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Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James +Random Hacker. + + , 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! + + diff --git a/libguile-ltdl/ChangeLog b/libguile-ltdl/ChangeLog new file mode 100644 index 000000000..2f24c2df0 --- /dev/null +++ b/libguile-ltdl/ChangeLog @@ -0,0 +1,94 @@ +2002-10-25 Marius Vollmer + + * upstream/ltdl.c: New copy from libtool 1.4.3. + * raw-ltdl.c: Merged in changes from libtool 1.4.3. + +2002-10-11 Marius Vollmer + + * upstream/Makefile.am (ltdl.h.diff, ltdl.c.diff): Look for + raw-ltdl.h and raw-ltdl.c in "$(srcdir)/..". This is needed for + VPATH builds. + + * Makefile.am (INCLUDES): Also look for includes in "." and + "$(srcdir)". This is needed for VPATH builds. + (EXTRA_DIST): Also distribute EXTRA_HEADERS. + +2002-10-09 Rob Browning + + * upstream/Makefile.am (ltdl.h.diff): remove + SCM_INSERTED_DLSYMLIST_STRUCT_DECL during diff computation. + (ltdl.c.diff): remove SCM_INSERTED_DLSYMLIST_STRUCT_DECL during + diff computation. + + * raw-ltdl.h: add SCM_INSERTED_DLSYMLIST_STRUCT_DECL so we can + insert our own struct name here. + + * guile-ltdl.h: add scm_lt_dlsymlist typedef. + (scm_lt_dlpreload_default): new function. Replaces + scm_lt_dlset_preloaded_symbols which depended on global that + libtool automagically defines in binaries, not libs. + + * guile-ltdl.c (scm_lt_dlpreload_default): new function. Replaces + scm_lt_dlset_preloaded_symbols which depended on global that + libtool automagically defines in binaries, not libs. Now the call + in guile.c has to pass us that magic value. + (SCM_INSERTED_DLSYMLIST_STRUCT_DECL): used to add a struct name in + the lt_dlsymlist typedef -- we use such a crazy name so we can + remove this in the upstream diff computation. + +2002-10-05 Marius Vollmer + + * upstream/Makefile.am (ltdl.h.diff, ltdl.c.diff): Create them in + '.' not in 'upstream' since we are already in upstream. + +2002-10-04 Rob Browning + + * COPYING.LIB: moved from ../libltdl. + + * ChangeLog: moved from ../libltdl. + + * README: moved from ../libltdl. + + * Makefile.am: build new libguile-ltdl. + + * upstream/Makefile.am: new file. + + * upstream/ltdl.c: upstream source. + + * upstream/ltdl.h: upstream source. + + * guile-ltdl.h: main header file for guile's internal + libguile-ltdl. + + * guile-ltdl.c: main source file for libguile-ltdl -- #includes + raw-ltdl.c and raw-ldtl.h directly. See README. + + * raw-ltdl.h: guile's modified version of the upstream ltdl.h. + + * raw-ltdl.c: guile's modified version of the upstream ltdl.c. + (memcpy): coerce ptrs to (char *) before copying characters + through them -- I can't recall for sure, but I believe this was + causing an overrun error at times. + (realloc): Remove custom realloc. (#define rpl_realloc realloc) + and comment out later code for custom realloc. You can't define + your own malloc unless you know enough about the malloc in use to + be able to tell how big the src ptr is. The disabled code + incorrectly used the *destination* ptr to decide how much to copy. + This sometimes results in out-of-bound accesses which cause + segfaults. This is a quick hack for now; we may want something + cleaner later. + (tryall_dlopen_module): check to be sure (dirname_len > 0) before + testing first character against '/'. + (try_dlopen): check for feof(file) in read loop -- otherwise + infloop? + (scm_lt_dlopenext): remove unused variable file_found. + (LT_EOS_CHAR): moved here from guile-ltdl.h. + +2002-10-04 Marius Vollmer + + * raw-ltdl.c: Renamed all exported functions and variables to have a + "scm_lt_" prefix. + (try_dlopen): Set newhandle to null when try_all_dlopen failed. + (scm_lt_dlopenext): Reverse test of "file_not_found()". + Previously, we would stop searching when the file wasn't found + yet, while we should continue in that case. diff --git a/libguile-ltdl/Makefile.am b/libguile-ltdl/Makefile.am new file mode 100644 index 000000000..46b613568 --- /dev/null +++ b/libguile-ltdl/Makefile.am @@ -0,0 +1,44 @@ +## Process this file with Automake to create Makefile.in +## +## Copyright (C) 2002 Free Software Foundation, Inc. +## +## This file is part of GUILE. +## +## GUILE is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as +## published by the Free Software Foundation; either version 2, or +## (at your option) any later version. +## +## GUILE is distributed in the hope that it will be useful, but +## WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public +## License along with GUILE; see the file COPYING. If not, write +## to the Free Software Foundation, Inc., 59 Temple Place, Suite +## 330, Boston, MA 02111-1307 USA + +SUBDIRS = upstream + +AUTOMAKE_OPTIONS = gnu + +## Prevent automake from adding extra -I options +DEFS = @DEFS@ +## Check for headers in $(srcdir)/.., so that #include +## will find MUMBLE.h in this dir when we're +## building. +INCLUDES = -I. -I$(srcdir) -I.. -I$(srcdir)/.. + +ETAGS_ARGS = --regex='/SCM_\(GLOBAL_\)?\(G?PROC\|G?PROC1\|SYMBOL\|VCELL\|CONST_LONG\).*\"\([^\"]\)*\"/\3/' \ + --regex='/[ \t]*SCM_[G]?DEFINE1?[ \t]*(\([^,]*\),[^,]*/\1/' + +# We don't install this header since no one should be using the lib directly. +EXTRA_HEADERS = guile-ltdl.h raw-ltdl.h +EXTRA_DIST = raw-ltdl.c $(EXTRA_HEADERS) + +lib_LTLIBRARIES = libguile-ltdl.la +libguile_ltdl_la_SOURCES = guile-ltdl.c +#libguile_ltdl_la_DEPENDENCIES = +libguile_ltdl_la_LIBADD = ${LIBADD_DL} +libguile_ltdl_la_LDFLAGS = -version-info 1:0:0 -export-dynamic -no-undefined diff --git a/libguile-ltdl/README b/libguile-ltdl/README new file mode 100644 index 000000000..e69de29bb diff --git a/libguile-ltdl/guile-ltdl.c b/libguile-ltdl/guile-ltdl.c new file mode 100644 index 000000000..f858770e9 --- /dev/null +++ b/libguile-ltdl/guile-ltdl.c @@ -0,0 +1,80 @@ +/* ltdl.c -- system independent dlopen wrapper + Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc. + Originally by Thomas Tanner + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA + +*/ + +#include "guile-ltdl.h" + +#define lt_dlhandle_struct scm_i_lt_dlhandle_struct +#define SCM_INSERTED_DLSYMLIST_STRUCT_DECL scm_i_lt_dlsymlist_struct + +#define LT_SCOPE static +#define SCMLTXT static +#define SCMLTSTATIC static + +#ifdef __GNUC__ +#define SCM_UNUSED __attribute__ ((unused)) +#else +#define SCM_UNUSED +#endif + +#include "raw-ltdl.h" +#include "raw-ltdl.c" + +void +scm_lt_dlpreload_default (const scm_lt_dlsymlist *preloads) +{ + lt_dlpreload_default(preloads); +} + +int +scm_lt_dlinit (void) +{ + return lt_dlinit (); +} + +scm_lt_dlhandle +scm_lt_dlopenext (const char *filename) +{ + return lt_dlopenext (filename); +} + +scm_lt_ptr +scm_lt_dlsym (scm_lt_dlhandle handle, const char *name) +{ + return lt_dlsym (handle, name); +} + +const char * +scm_lt_dlerror (void) +{ + return lt_dlerror (); +} + +int +scm_lt_dlclose (scm_lt_dlhandle handle) +{ + return lt_dlclose (handle); +} diff --git a/libguile-ltdl/guile-ltdl.h b/libguile-ltdl/guile-ltdl.h new file mode 100644 index 000000000..2f957d5e7 --- /dev/null +++ b/libguile-ltdl/guile-ltdl.h @@ -0,0 +1,40 @@ +/* guile-ltdl.h -- dlopen function actually used by guile + Copyright (C) 1998-2000, 2002 Free Software Foundation, Inc. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free +Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA +*/ + +/* Only include this header file once. */ +#ifndef SCM_LTDL_H +#define SCM_LTDL_H 1 + +typedef struct scm_i_lt_dlhandle_struct *scm_lt_dlhandle; +typedef struct scm_i_lt_dlsymlist_struct scm_lt_dlsymlist; +typedef void * scm_lt_ptr; + +void scm_lt_dlpreload_default (const scm_lt_dlsymlist *preloads); +int scm_lt_dlinit (void); +scm_lt_dlhandle scm_lt_dlopenext (const char *filename); +scm_lt_ptr scm_lt_dlsym (scm_lt_dlhandle handle, const char *name); +const char *scm_lt_dlerror (void); +int scm_lt_dlclose (scm_lt_dlhandle handle); + +#endif /* !SCM_LTDL_H */ diff --git a/libguile-ltdl/raw-ltdl.c b/libguile-ltdl/raw-ltdl.c new file mode 100644 index 000000000..eafef27a7 --- /dev/null +++ b/libguile-ltdl/raw-ltdl.c @@ -0,0 +1,4009 @@ +/* ltdl.c -- system independent dlopen wrapper + Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc. + Originally by Thomas Tanner + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA + +*/ + +#if HAVE_CONFIG_H +# include +#endif + +#if HAVE_UNISTD_H +# include +#endif + +#if HAVE_STDIO_H +# include +#endif + +#if HAVE_STDLIB_H +# include +#endif + +#if HAVE_STRING_H +# include +#else +# if HAVE_STRINGS_H +# include +# endif +#endif + +#if HAVE_CTYPE_H +# include +#endif + +#if HAVE_MALLOC_H +# include +#endif + +#if HAVE_MEMORY_H +# include +#endif + +#if HAVE_ERRNO_H +# include +#endif + +#if HAVE_DIRENT_H +# include +# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name)) +#else +# define dirent direct +# define LT_D_NAMLEN(dirent) ((dirent)->d_namlen) +# if HAVE_SYS_NDIR_H +# include +# endif +# if HAVE_SYS_DIR_H +# include +# endif +# if HAVE_NDIR_H +# include +# endif +#endif + +#if HAVE_ARGZ_H +# include +#endif + +#if HAVE_ASSERT_H +# include +#else +# define assert(arg) ((void) 0) +#endif + +#include "raw-ltdl.h" + +#if WITH_DMALLOC +# include +#endif + + +/* Saves on those hard to debug '\0' typos.... */ +#define LT_EOS_CHAR '\0' + + +/* --- WINDOWS SUPPORT --- */ + + +#ifdef DLL_EXPORT +# define LT_GLOBAL_DATA __declspec(dllexport) +#else +# define LT_GLOBAL_DATA +#endif + +/* fopen() mode flags for reading a text file */ +#undef LT_READTEXT_MODE +#ifdef __WINDOWS__ +# define LT_READTEXT_MODE "rt" +#else +# define LT_READTEXT_MODE "r" +#endif + + + + +/* --- MANIFEST CONSTANTS --- */ + + +/* Standard libltdl search path environment variable name */ +#undef LTDL_SEARCHPATH_VAR +#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH" + +/* Standard libtool archive file extension. */ +#undef LTDL_ARCHIVE_EXT +#define LTDL_ARCHIVE_EXT ".la" + +/* max. filename length */ +#ifndef LT_FILENAME_MAX +# define LT_FILENAME_MAX 1024 +#endif + +/* This is the maximum symbol size that won't require malloc/free */ +#undef LT_SYMBOL_LENGTH +#define LT_SYMBOL_LENGTH 128 + +/* This accounts for the _LTX_ separator */ +#undef LT_SYMBOL_OVERHEAD +#define LT_SYMBOL_OVERHEAD 5 + + + + +/* --- MEMORY HANDLING --- */ + + +/* These are the functions used internally. In addition to making + use of the associated function pointers above, they also perform + error handling. */ +static char *lt_estrdup LT_PARAMS((const char *str)); +static lt_ptr lt_emalloc LT_PARAMS((size_t size)); +static lt_ptr lt_erealloc LT_PARAMS((lt_ptr addr, size_t size)); + +#define rpl_realloc realloc + +/* These are the pointers that can be changed by the caller: */ +SCMLTSTATIC LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)) + = (lt_ptr (*) LT_PARAMS((size_t))) malloc; +SCMLTSTATIC LT_GLOBAL_DATA lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size)) + = (lt_ptr (*) LT_PARAMS((lt_ptr, size_t))) rpl_realloc; +SCMLTSTATIC LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)) + = (void (*) LT_PARAMS((lt_ptr))) free; + +/* The following macros reduce the amount of typing needed to cast + assigned memory. */ +#if WITH_DMALLOC + +#define LT_DLMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) +#define LT_DLREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) +#define LT_DLFREE(p) \ + LT_STMT_START { if (p) (p) = (xfree (p), (lt_ptr) 0); } LT_STMT_END + +#define LT_EMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) +#define LT_EREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) + +#else + +#define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp))) +#define LT_DLREALLOC(tp, p, n) ((tp *) rpl_realloc ((p), (n) * sizeof(tp))) +#define LT_DLFREE(p) \ + LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END + +#define LT_EMALLOC(tp, n) ((tp *) lt_emalloc ((n) * sizeof(tp))) +#define LT_EREALLOC(tp, p, n) ((tp *) lt_erealloc ((p), (n) * sizeof(tp))) + +#endif + +#define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \ + if ((p) != (q)) { if (p) lt_dlfree (p); (p) = (q); (q) = 0; } \ + } LT_STMT_END + + +/* --- REPLACEMENT FUNCTIONS --- */ + + +#undef strdup +#define strdup rpl_strdup + +static char *strdup LT_PARAMS((const char *str)); + +static char * +strdup(str) + const char *str; +{ + char *tmp = NULL; + + if (str) + { + tmp = LT_DLMALLOC (char, 1+ strlen (str)); + if (tmp) + { + strcpy(tmp, str); + } + } + + return tmp; +} + + +#if ! HAVE_STRCMP + +#undef strcmp +#define strcmp rpl_strcmp + +static int strcmp LT_PARAMS((const char *str1, const char *str2)); + +static int +strcmp (str1, str2) + const char *str1; + const char *str2; +{ + if (str1 == str2) + return 0; + if (str1 == NULL) + return -1; + if (str2 == NULL) + return 1; + + for (;*str1 && *str2; ++str1, ++str2) + { + if (*str1 != *str2) + break; + } + + return (int)(*str1 - *str2); +} +#endif + + +#if ! HAVE_STRCHR + +# if HAVE_INDEX +# define strchr index +# else +# define strchr rpl_strchr + +static const char *strchr LT_PARAMS((const char *str, int ch)); + +static const char* +strchr(str, ch) + const char *str; + int ch; +{ + const char *p; + + for (p = str; *p != (char)ch && *p != LT_EOS_CHAR; ++p) + /*NOWORK*/; + + return (*p == (char)ch) ? p : 0; +} + +# endif +#endif /* !HAVE_STRCHR */ + + +#if ! HAVE_STRRCHR + +# if HAVE_RINDEX +# define strrchr rindex +# else +# define strrchr rpl_strrchr + +static const char *strrchr LT_PARAMS((const char *str, int ch)); + +static const char* +strrchr(str, ch) + const char *str; + int ch; +{ + const char *p, *q = NULL; + + for (p = str; *p != LT_EOS_CHAR; ++p) + { + if (*p == (char) ch) + { + q = p; + } + } + + return q; +} + +# endif +#endif + +/* NOTE: Neither bcopy nor the memcpy implementation below can + reliably handle copying in overlapping areas of memory. Use + memmove (for which there is a fallback implmentation below) + if you need that behaviour. */ +#if ! HAVE_MEMCPY + +# if HAVE_BCOPY +# define memcpy(dest, src, size) bcopy (src, dest, size) +# else +# define memcpy rpl_memcpy + +static lt_ptr memcpy LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); + +static lt_ptr +memcpy (dest, src, size) + lt_ptr dest; + const lt_ptr src; + size_t size; +{ + size_t i = 0; + + for (i = 0; i < size; ++i) + { + ((char *) dest)[i] = ((char *) src)[i]; + } + + return dest; +} + +# endif /* !HAVE_BCOPY */ +#endif /* !HAVE_MEMCPY */ + +#if ! HAVE_MEMMOVE +# define memmove rpl_memmove + +static lt_ptr memmove LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); + +static lt_ptr +memmove (dest, src, size) + lt_ptr dest; + const lt_ptr src; + size_t size; +{ + size_t i; + + if (dest < src) + for (i = 0; i < size; ++i) + { + dest[i] = src[i]; + } + else if (dest > src) + for (i = size -1; i >= 0; --i) + { + dest[i] = src[i]; + } + + return dest; +} + +#endif /* !HAVE_MEMMOVE */ + + +/* According to Alexandre Oliva , + ``realloc is not entirely portable'' + In any case we want to use the allocator supplied by the user without + burdening them with an lt_dlrealloc function pointer to maintain. + Instead implement our own version (with known boundary conditions) + using lt_dlmalloc and lt_dlfree. */ + + +#if 0 + + /* You can't (re)define realloc unless you also (re)define malloc. + Right now, this code uses the size of the *destination* to decide + how much to copy. That's not right, but you can't know the size + of the source unless you know enough about, or wrote malloc. So + this code is disabled... */ + +static lt_ptr +realloc (ptr, size) + lt_ptr ptr; + size_t size; +{ + if (size == 0) + { + /* For zero or less bytes, free the original memory */ + if (ptr != NULL) + { + lt_dlfree (ptr); + } + + return (lt_ptr) 0; + } + else if (ptr == NULL) + { + /* Allow reallocation of a NULL pointer. */ + return lt_dlmalloc (size); + } + else + { + /* Allocate a new block, copy and free the old block. */ + lt_ptr mem = lt_dlmalloc (size); + + if (mem) + { + memcpy (mem, ptr, size); + lt_dlfree (ptr); + } + + /* Note that the contents of PTR are not damaged if there is + insufficient memory to realloc. */ + return mem; + } +} + +#endif + + +#if ! HAVE_ARGZ_APPEND +# define argz_append rpl_argz_append + +static error_t argz_append LT_PARAMS((char **pargz, size_t *pargz_len, + const char *buf, size_t buf_len)); + +static error_t +argz_append (pargz, pargz_len, buf, buf_len) + char **pargz; + size_t *pargz_len; + const char *buf; + size_t buf_len; +{ + size_t argz_len; + char *argz; + + assert (pargz); + assert (pargz_len); + assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len)); + + /* If nothing needs to be appended, no more work is required. */ + if (buf_len == 0) + return 0; + + /* Ensure there is enough room to append BUF_LEN. */ + argz_len = *pargz_len + buf_len; + argz = LT_DLREALLOC (char, *pargz, argz_len); + if (!argz) + return ENOMEM; + + /* Copy characters from BUF after terminating '\0' in ARGZ. */ + memcpy (argz + *pargz_len, buf, buf_len); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + + return 0; +} +#endif /* !HAVE_ARGZ_APPEND */ + + +#if ! HAVE_ARGZ_CREATE_SEP +# define argz_create_sep rpl_argz_create_sep + +static error_t argz_create_sep LT_PARAMS((const char *str, int delim, + char **pargz, size_t *pargz_len)); + +static error_t +argz_create_sep (str, delim, pargz, pargz_len) + const char *str; + int delim; + char **pargz; + size_t *pargz_len; +{ + size_t argz_len; + char *argz = NULL; + + assert (str); + assert (pargz); + assert (pargz_len); + + /* Make a copy of STR, but replacing each occurence of + DELIM with '\0'. */ + argz_len = 1+ LT_STRLEN (str); + if (argz_len) + { + const char *p; + char *q; + + argz = LT_DLMALLOC (char, argz_len); + if (!argz) + return ENOMEM; + + for (p = str, q = argz; *p != LT_EOS_CHAR; ++p) + { + if (*p == delim) + { + /* Ignore leading delimiters, and fold consecutive + delimiters in STR into a single '\0' in ARGZ. */ + if ((q > argz) && (q[-1] != LT_EOS_CHAR)) + *q++ = LT_EOS_CHAR; + else + --argz_len; + } + else + *q++ = *p; + } + /* Copy terminating LT_EOS_CHAR. */ + *q = *p; + } + + /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */ + if (!argz_len) + LT_DLFREE (argz); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + + return 0; +} +#endif /* !HAVE_ARGZ_CREATE_SEP */ + + +#if ! HAVE_ARGZ_INSERT +# define argz_insert rpl_argz_insert + +static error_t argz_insert LT_PARAMS((char **pargz, size_t *pargz_len, + char *before, const char *entry)); + +static error_t +argz_insert (pargz, pargz_len, before, entry) + char **pargz; + size_t *pargz_len; + char *before; + const char *entry; +{ + assert (pargz); + assert (pargz_len); + assert (entry && *entry); + + /* No BEFORE address indicates ENTRY should be inserted after the + current last element. */ + if (!before) + return argz_append (pargz, pargz_len, entry, 1+ LT_STRLEN (entry)); + + /* This probably indicates a programmer error, but to preserve + semantics, scan back to the start of an entry if BEFORE points + into the middle of it. */ + while ((before >= *pargz) && (before[-1] != LT_EOS_CHAR)) + --before; + + { + size_t entry_len = 1+ LT_STRLEN (entry); + size_t argz_len = *pargz_len + entry_len; + size_t offset = before - *pargz; + char *argz = LT_DLREALLOC (char, *pargz, argz_len); + + if (!argz) + return ENOMEM; + + /* Make BEFORE point to the equivalent offset in ARGZ that it + used to have in *PARGZ incase realloc() moved the block. */ + before = argz + offset; + + /* Move the ARGZ entries starting at BEFORE up into the new + space at the end -- making room to copy ENTRY into the + resulting gap. */ + memmove (before + entry_len, before, *pargz_len - offset); + memcpy (before, entry, entry_len); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + } + + return 0; +} +#endif /* !HAVE_ARGZ_INSERT */ + + +#if ! HAVE_ARGZ_NEXT +# define argz_next rpl_argz_next + +static char *argz_next LT_PARAMS((char *argz, size_t argz_len, + const char *entry)); + +static char * +argz_next (argz, argz_len, entry) + char *argz; + size_t argz_len; + const char *entry; +{ + assert ((argz && argz_len) || (!argz && !argz_len)); + + if (entry) + { + /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address + within the ARGZ vector. */ + assert ((!argz && !argz_len) + || ((argz <= entry) && (entry < (argz + argz_len)))); + + /* Move to the char immediately after the terminating + '\0' of ENTRY. */ + entry = 1+ strchr (entry, LT_EOS_CHAR); + + /* Return either the new ENTRY, or else NULL if ARGZ is + exhausted. */ + return (entry >= argz + argz_len) ? 0 : (char *) entry; + } + else + { + /* This should probably be flagged as a programmer error, + since starting an argz_next loop with the iterator set + to ARGZ is safer. To preserve semantics, handle the NULL + case by returning the start of ARGZ (if any). */ + if (argz_len > 0) + return argz; + else + return 0; + } +} +#endif /* !HAVE_ARGZ_NEXT */ + + + +#if ! HAVE_ARGZ_STRINGIFY +# define argz_stringify rpl_argz_stringify + +static void argz_stringify LT_PARAMS((char *argz, size_t argz_len, + int sep)); + +static void +argz_stringify (argz, argz_len, sep) + char *argz; + size_t argz_len; + int sep; +{ + assert ((argz && argz_len) || (!argz && !argz_len)); + + if (sep) + { + --argz_len; /* don't stringify the terminating EOS */ + while (--argz_len > 0) + { + if (argz[argz_len] == LT_EOS_CHAR) + argz[argz_len] = sep; + } + } +} +#endif /* !HAVE_ARGZ_STRINGIFY */ + + + + +/* --- TYPE DEFINITIONS -- */ + + +/* This type is used for the array of caller data sets in each handler. */ +typedef struct { + lt_dlcaller_id key; + lt_ptr data; +} lt_caller_data; + + + + +/* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */ + + +/* Extract the diagnostic strings from the error table macro in the same + order as the enumerated indices in ltdl.h. */ + +static const char *lt_dlerror_strings[] = + { +#define LT_ERROR(name, diagnostic) (diagnostic), + lt_dlerror_table +#undef LT_ERROR + + 0 + }; + +/* This structure is used for the list of registered loaders. */ +struct lt_dlloader { + struct lt_dlloader *next; + const char *loader_name; /* identifying name for each loader */ + const char *sym_prefix; /* prefix for symbols */ + lt_module_open *module_open; + lt_module_close *module_close; + lt_find_sym *find_sym; + lt_dlloader_exit *dlloader_exit; + lt_user_data dlloader_data; +}; + +struct lt_dlhandle_struct { + struct lt_dlhandle_struct *next; + lt_dlloader *loader; /* dlopening interface */ + lt_dlinfo info; + int depcount; /* number of dependencies */ + lt_dlhandle *deplibs; /* dependencies */ + lt_module module; /* system module handle */ + lt_ptr system; /* system specific data */ + lt_caller_data *caller_data; /* per caller associated data */ + int flags; /* various boolean stats */ +}; + +/* Various boolean flags can be stored in the flags field of an + lt_dlhandle_struct... */ +#define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag)) +#define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag)) + +#define LT_DLRESIDENT_FLAG (0x01 << 0) +/* ...add more flags here... */ + +#define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG) + + +#define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)] + +static const char objdir[] = LTDL_OBJDIR; +static const char archive_ext[] = LTDL_ARCHIVE_EXT; +#ifdef LTDL_SHLIB_EXT +static const char shlib_ext[] = LTDL_SHLIB_EXT; +#endif +#ifdef LTDL_SYSSEARCHPATH +static const char sys_search_path[] = LTDL_SYSSEARCHPATH; +#endif + + + + +/* --- MUTEX LOCKING --- */ + + +/* Macros to make it easier to run the lock functions only if they have + been registered. The reason for the complicated lock macro is to + ensure that the stored error message from the last error is not + accidentally erased if the current function doesn't generate an + error of its own. */ +#define LT_DLMUTEX_LOCK() LT_STMT_START { \ + if (lt_dlmutex_lock_func) (*lt_dlmutex_lock_func)(); \ + } LT_STMT_END +#define LT_DLMUTEX_UNLOCK() LT_STMT_START { \ + if (lt_dlmutex_unlock_func) (*lt_dlmutex_unlock_func)();\ + } LT_STMT_END +#define LT_DLMUTEX_SETERROR(errormsg) LT_STMT_START { \ + if (lt_dlmutex_seterror_func) \ + (*lt_dlmutex_seterror_func) (errormsg); \ + else lt_dllast_error = (errormsg); } LT_STMT_END +#define LT_DLMUTEX_GETERROR(errormsg) LT_STMT_START { \ + if (lt_dlmutex_seterror_func) \ + (errormsg) = (*lt_dlmutex_geterror_func) (); \ + else (errormsg) = lt_dllast_error; } LT_STMT_END + +/* The mutex functions stored here are global, and are necessarily the + same for all threads that wish to share access to libltdl. */ +static lt_dlmutex_lock *lt_dlmutex_lock_func = NULL; +static lt_dlmutex_unlock *lt_dlmutex_unlock_func = NULL; +static lt_dlmutex_seterror *lt_dlmutex_seterror_func = NULL; +static lt_dlmutex_geterror *lt_dlmutex_geterror_func = NULL; +static const char *lt_dllast_error = NULL; + + +/* Either set or reset the mutex functions. Either all the arguments must + be valid functions, or else all can be NULL to turn off locking entirely. + The registered functions should be manipulating a static global lock + from the lock() and unlock() callbacks, which needs to be reentrant. */ +int +lt_dlmutex_register (lock, unlock, seterror, geterror) + lt_dlmutex_lock *lock; + lt_dlmutex_unlock *unlock; + lt_dlmutex_seterror *seterror; + lt_dlmutex_geterror *geterror; +{ + lt_dlmutex_unlock *old_unlock = unlock; + int errors = 0; + + /* Lock using the old lock() callback, if any. */ + LT_DLMUTEX_LOCK (); + + if ((lock && unlock && seterror && geterror) + || !(lock || unlock || seterror || geterror)) + { + lt_dlmutex_lock_func = lock; + lt_dlmutex_unlock_func = unlock; + lt_dlmutex_geterror_func = geterror; + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS)); + ++errors; + } + + /* Use the old unlock() callback we saved earlier, if any. Otherwise + record any errors using internal storage. */ + if (old_unlock) + (*old_unlock) (); + + /* Return the number of errors encountered during the execution of + this function. */ + return errors; +} + + + + +/* --- ERROR HANDLING --- */ + +static const char **user_error_strings = NULL; +static int errorcount = LT_ERROR_MAX; + +int +lt_dladderror (diagnostic) + const char *diagnostic; +{ + int errindex = 0; + int result = -1; + const char **temp = NULL; + + assert (diagnostic); + + LT_DLMUTEX_LOCK (); + + errindex = errorcount - LT_ERROR_MAX; + temp = LT_EREALLOC (const char *, user_error_strings, 1 + errindex); + if (temp) + { + user_error_strings = temp; + user_error_strings[errindex] = diagnostic; + result = errorcount++; + } + + LT_DLMUTEX_UNLOCK (); + + return result; +} + +int +lt_dlseterror (errindex) + int errindex; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + if (errindex >= errorcount || errindex < 0) + { + /* Ack! Error setting the error message! */ + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE)); + ++errors; + } + else if (errindex < LT_ERROR_MAX) + { + /* No error setting the error message! */ + LT_DLMUTEX_SETERROR (lt_dlerror_strings[errindex]); + } + else + { + /* No error setting the error message! */ + LT_DLMUTEX_SETERROR (user_error_strings[errindex - LT_ERROR_MAX]); + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static lt_ptr +lt_emalloc (size) + size_t size; +{ + lt_ptr mem = lt_dlmalloc (size); + if (size && !mem) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return mem; +} + +static lt_ptr +lt_erealloc (addr, size) + lt_ptr addr; + size_t size; +{ + lt_ptr mem = realloc (addr, size); + if (size && !mem) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return mem; +} + +static char * +lt_estrdup (str) + const char *str; +{ + char *copy = strdup (str); + if (LT_STRLEN (str) && !copy) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return copy; +} + + + + +/* --- DLOPEN() INTERFACE LOADER --- */ + + +/* The Cygwin dlopen implementation prints a spurious error message to + stderr if its call to LoadLibrary() fails for any reason. We can + mitigate this by not using the Cygwin implementation, and falling + back to our own LoadLibrary() wrapper. */ +#if HAVE_LIBDL && !defined(__CYGWIN__) + +/* dynamic linking with dlopen/dlsym */ + +#if HAVE_DLFCN_H +# include +#endif + +#if HAVE_SYS_DL_H +# include +#endif + +#ifdef RTLD_GLOBAL +# define LT_GLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_GLOBAL DL_GLOBAL +# endif +#endif /* !RTLD_GLOBAL */ +#ifndef LT_GLOBAL +# define LT_GLOBAL 0 +#endif /* !LT_GLOBAL */ + +/* We may have to define LT_LAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_LAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_LAZY_OR_NOW DL_LAZY +# endif +# endif /* !RTLD_LAZY */ +#endif +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_NOW +# define LT_LAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_LAZY_OR_NOW DL_NOW +# endif +# endif /* !RTLD_NOW */ +#endif +#ifndef LT_LAZY_OR_NOW +# define LT_LAZY_OR_NOW 0 +#endif /* !LT_LAZY_OR_NOW */ + +#if HAVE_DLERROR +# define DLERROR(arg) dlerror () +#else +# define DLERROR(arg) LT_DLSTRERROR (arg) +#endif + +static lt_module +sys_dl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW); + + if (!module) + { + LT_DLMUTEX_SETERROR (DLERROR (CANNOT_OPEN)); + } + + return module; +} + +static int +sys_dl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dlclose (module) != 0) + { + LT_DLMUTEX_SETERROR (DLERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_dl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dlsym (module, symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dl = + { +# ifdef NEED_USCORE + "_", +# else + 0, +# endif + sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 }; + + +#endif /* HAVE_LIBDL */ + + + +/* --- SHL_LOAD() INTERFACE LOADER --- */ + +#if HAVE_SHL_LOAD + +/* dynamic linking with shl_load (HP-UX) (comments from gmodule) */ + +#ifdef HAVE_DL_H +# include +#endif + +/* some flags are missing on some systems, so we provide + * harmless defaults. + * + * Mandatory: + * BIND_IMMEDIATE - Resolve symbol references when the library is loaded. + * BIND_DEFERRED - Delay code symbol resolution until actual reference. + * + * Optionally: + * BIND_FIRST - Place the library at the head of the symbol search + * order. + * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all + * unsatisfied symbols as fatal. This flag allows + * binding of unsatisfied code symbols to be deferred + * until use. + * [Perl: For certain libraries, like DCE, deferred + * binding often causes run time problems. Adding + * BIND_NONFATAL to BIND_IMMEDIATE still allows + * unresolved references in situations like this.] + * BIND_NOSTART - Do not call the initializer for the shared library + * when the library is loaded, nor on a future call to + * shl_unload(). + * BIND_VERBOSE - Print verbose messages concerning possible + * unsatisfied symbols. + * + * hp9000s700/hp9000s800: + * BIND_RESTRICTED - Restrict symbols visible by the library to those + * present at library load time. + * DYNAMIC_PATH - Allow the loader to dynamically search for the + * library specified by the path argument. + */ + +#ifndef DYNAMIC_PATH +# define DYNAMIC_PATH 0 +#endif +#ifndef BIND_RESTRICTED +# define BIND_RESTRICTED 0 +#endif + +#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) + +static lt_module +sys_shl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + static shl_t self = (shl_t) 0; + lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L); + + /* Since searching for a symbol against a NULL module handle will also + look in everything else that was already loaded and exported with + the -E compiler flag, we always cache a handle saved before any + modules are loaded. */ + if (!self) + { + lt_ptr address; + shl_findsym (&self, "main", TYPE_UNDEFINED, &address); + } + + if (!filename) + { + module = self; + } + else + { + module = shl_load (filename, LT_BIND_FLAGS, 0L); + + if (!module) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + } + } + + return module; +} + +static int +sys_shl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (module && (shl_unload ((shl_t) (module)) != 0)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_shl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = NULL; + + /* sys_shl_open should never return a NULL module handle */ + if (module == (lt_module) 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + } + else if (!shl_findsym((shl_t*) &module, symbol, TYPE_UNDEFINED, &address)) + { + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + } + + return address; +} + +static struct lt_user_dlloader sys_shl = { + 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 +}; + +#endif /* HAVE_SHL_LOAD */ + + + + +/* --- LOADLIBRARY() INTERFACE LOADER --- */ + +#ifdef __WINDOWS__ + +/* dynamic linking for Win32 */ + +#include + +/* Forward declaration; required to implement handle search below. */ +static lt_dlhandle handles; + +static lt_module +sys_wll_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlhandle cur; + lt_module module = NULL; + const char *errormsg = NULL; + char *searchname = NULL; + char *ext; + char self_name_buf[MAX_PATH]; + + if (!filename) + { + /* Get the name of main module */ + *self_name_buf = '\0'; + GetModuleFileName (NULL, self_name_buf, sizeof (self_name_buf)); + filename = ext = self_name_buf; + } + else + { + ext = strrchr (filename, '.'); + } + + if (ext) + { + /* FILENAME already has an extension. */ + searchname = lt_estrdup (filename); + } + else + { + /* Append a `.' to stop Windows from adding an + implicit `.dll' extension. */ + searchname = LT_EMALLOC (char, 2+ LT_STRLEN (filename)); + if (searchname) + sprintf (searchname, "%s.", filename); + } + if (!searchname) + return 0; + +#if __CYGWIN__ + { + char wpath[MAX_PATH]; + cygwin_conv_to_full_win32_path(searchname, wpath); + module = LoadLibrary(wpath); + } +#else + module = LoadLibrary (searchname); +#endif + LT_DLFREE (searchname); + + /* libltdl expects this function to fail if it is unable + to physically load the library. Sadly, LoadLibrary + will search the loaded libraries for a match and return + one of them if the path search load fails. + + We check whether LoadLibrary is returning a handle to + an already loaded module, and simulate failure if we + find one. */ + LT_DLMUTEX_LOCK (); + cur = handles; + while (cur) + { + if (!cur->module) + { + cur = NULL; + break; + } + + if (cur->module == module) + { + break; + } + + cur = cur->next; + } + LT_DLMUTEX_UNLOCK (); + + if (cur || !module) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + module = NULL; + } + + return module; +} + +static int +sys_wll_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (FreeLibrary(module) == 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_wll_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = GetProcAddress (module, symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_wll = { + 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 +}; + +#endif /* __WINDOWS__ */ + + + + +/* --- LOAD_ADD_ON() INTERFACE LOADER --- */ + + +#ifdef __BEOS__ + +/* dynamic linking for BeOS */ + +#include + +static lt_module +sys_bedl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + image_id image = 0; + + if (filename) + { + image = load_add_on (filename); + } + else + { + image_info info; + int32 cookie = 0; + if (get_next_image_info (0, &cookie, &info) == B_OK) + image = load_add_on (info.name); + } + + if (image <= 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + image = 0; + } + + return (lt_module) image; +} + +static int +sys_bedl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (unload_add_on ((image_id) module) != B_OK) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_bedl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = NULL; + image_id image = (image_id) module; + + if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + address = NULL; + } + + return address; +} + +static struct lt_user_dlloader sys_bedl = { + 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 +}; + +#endif /* __BEOS__ */ + + + + +/* --- DLD_LINK() INTERFACE LOADER --- */ + + +#if HAVE_DLD + +/* dynamic linking with dld */ + +#if HAVE_DLD_H +#include +#endif + +static lt_module +sys_dld_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module = strdup (filename); + + if (dld_link (filename) != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + LT_DLFREE (module); + module = NULL; + } + + return module; +} + +static int +sys_dld_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dld_unlink_by_file ((char*)(module), 1) != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + else + { + LT_DLFREE (module); + } + + return errors; +} + +static lt_ptr +sys_dld_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dld_get_func (symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dld = { + 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0 +}; + +#endif /* HAVE_DLD */ + + + + +/* --- DLPREOPEN() INTERFACE LOADER --- */ + + +/* emulate dynamic linking using preloaded_symbols */ + +typedef struct lt_dlsymlists_t +{ + struct lt_dlsymlists_t *next; + const lt_dlsymlist *syms; +} lt_dlsymlists_t; + +static const lt_dlsymlist *default_preloaded_symbols = NULL; +static lt_dlsymlists_t *preloaded_symbols = NULL; + +static int +presym_init (loader_data) + lt_user_data loader_data; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + preloaded_symbols = NULL; + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static int +presym_free_symlists () +{ + lt_dlsymlists_t *lists; + + LT_DLMUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + lt_dlsymlists_t *tmp = lists; + + lists = lists->next; + LT_DLFREE (tmp); + } + preloaded_symbols = NULL; + + LT_DLMUTEX_UNLOCK (); + + return 0; +} + +static int +presym_exit (loader_data) + lt_user_data loader_data; +{ + presym_free_symlists (); + return 0; +} + +static int +presym_add_symlist (preloaded) + const lt_dlsymlist *preloaded; +{ + lt_dlsymlists_t *tmp; + lt_dlsymlists_t *lists; + int errors = 0; + + LT_DLMUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + if (lists->syms == preloaded) + { + goto done; + } + lists = lists->next; + } + + tmp = LT_EMALLOC (lt_dlsymlists_t, 1); + if (tmp) + { + memset (tmp, 0, sizeof(lt_dlsymlists_t)); + tmp->syms = preloaded; + tmp->next = preloaded_symbols; + preloaded_symbols = tmp; + } + else + { + ++errors; + } + + done: + LT_DLMUTEX_UNLOCK (); + return errors; +} + +static lt_module +presym_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlsymlists_t *lists; + lt_module module = (lt_module) 0; + + LT_DLMUTEX_LOCK (); + lists = preloaded_symbols; + + if (!lists) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS)); + goto done; + } + + /* Can't use NULL as the reflective symbol header, as NULL is + used to mark the end of the entire symbol list. Self-dlpreopened + symbols follow this magic number, chosen to be an unlikely + clash with a real module name. */ + if (!filename) + { + filename = "@PROGRAM@"; + } + + while (lists) + { + const lt_dlsymlist *syms = lists->syms; + + while (syms->name) + { + if (!syms->address && strcmp(syms->name, filename) == 0) + { + module = (lt_module) syms; + goto done; + } + ++syms; + } + + lists = lists->next; + } + + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + + done: + LT_DLMUTEX_UNLOCK (); + return module; +} + +static int +presym_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + /* Just to silence gcc -Wall */ + module = NULL; + return 0; +} + +static lt_ptr +presym_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_dlsymlist *syms = (lt_dlsymlist*) module; + + ++syms; + while (syms->address) + { + if (strcmp(syms->name, symbol) == 0) + { + return syms->address; + } + + ++syms; + } + + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + + return 0; +} + +static struct lt_user_dlloader presym = { + 0, presym_open, presym_close, presym_sym, presym_exit, 0 +}; + + + + + +/* --- DYNAMIC MODULE LOADING --- */ + + +/* The type of a function used at each iteration of foreach_dirinpath(). */ +typedef int foreach_callback_func LT_PARAMS((char *filename, lt_ptr data1, + lt_ptr data2)); + +static int foreach_dirinpath LT_PARAMS((const char *search_path, + const char *base_name, + foreach_callback_func *func, + lt_ptr data1, lt_ptr data2)); + +static int find_file_callback LT_PARAMS((char *filename, lt_ptr data, + lt_ptr ignored)); +static int find_handle_callback LT_PARAMS((char *filename, lt_ptr data, + lt_ptr ignored)); +static int foreachfile_callback LT_PARAMS((char *filename, lt_ptr data1, + lt_ptr data2)); + + +static int canonicalize_path LT_PARAMS((const char *path, + char **pcanonical)); +static int argzize_path LT_PARAMS((const char *path, + char **pargz, + size_t *pargz_len)); +static FILE *find_file LT_PARAMS((const char *search_path, + const char *base_name, + char **pdir)); +static lt_dlhandle *find_handle LT_PARAMS((const char *search_path, + const char *base_name, + lt_dlhandle *handle)); +static int find_module LT_PARAMS((lt_dlhandle *handle, + const char *dir, + const char *libdir, + const char *dlname, + const char *old_name, + int installed)); +static int free_vars LT_PARAMS((char *dlname, char *oldname, + char *libdir, char *deplibs)); +static int load_deplibs LT_PARAMS((lt_dlhandle handle, + char *deplibs)); +static int trim LT_PARAMS((char **dest, + const char *str)); +static int try_dlopen LT_PARAMS((lt_dlhandle *handle, + const char *filename)); +static int tryall_dlopen LT_PARAMS((lt_dlhandle *handle, + const char *filename)); +static int unload_deplibs LT_PARAMS((lt_dlhandle handle)); +static int lt_argz_insert LT_PARAMS((char **pargz, + size_t *pargz_len, + char *before, + const char *entry)); +static int lt_argz_insertinorder LT_PARAMS((char **pargz, + size_t *pargz_len, + const char *entry)); +static int lt_argz_insertdir LT_PARAMS((char **pargz, + size_t *pargz_len, + const char *dirnam, + struct dirent *dp)); +static int lt_dlpath_insertdir LT_PARAMS((char **ppath, + char *before, + const char *dir)); +static int list_files_by_dir LT_PARAMS((const char *dirnam, + char **pargz, + size_t *pargz_len)); +static int file_not_found LT_PARAMS((void)); + +static char *user_search_path= NULL; +static lt_dlloader *loaders = NULL; +static lt_dlhandle handles = NULL; +static int initialized = 0; + +/* Initialize libltdl. */ +int +lt_dlinit () +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + /* Initialize only at first call. */ + if (++initialized == 1) + { + handles = NULL; + user_search_path = NULL; /* empty search path */ + +#if HAVE_LIBDL && !defined(__CYGWIN__) + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen"); +#endif +#if HAVE_SHL_LOAD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen"); +#endif +#ifdef __WINDOWS__ + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen"); +#endif +#ifdef __BEOS__ + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen"); +#endif +#if HAVE_DLD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld"); +#endif + errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload"); + + if (presym_init (presym.dlloader_data)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER)); + ++errors; + } + else if (errors != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED)); + ++errors; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlpreload (preloaded) + const lt_dlsymlist *preloaded; +{ + int errors = 0; + + if (preloaded) + { + errors = presym_add_symlist (preloaded); + } + else + { + presym_free_symlists(); + + LT_DLMUTEX_LOCK (); + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlpreload_default (preloaded) + const lt_dlsymlist *preloaded; +{ + LT_DLMUTEX_LOCK (); + default_preloaded_symbols = preloaded; + LT_DLMUTEX_UNLOCK (); + return 0; +} + +int +lt_dlexit () +{ + /* shut down libltdl */ + lt_dlloader *loader; + int errors = 0; + + LT_DLMUTEX_LOCK (); + loader = loaders; + + if (!initialized) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN)); + ++errors; + goto done; + } + + /* shut down only at last call. */ + if (--initialized == 0) + { + int level; + + while (handles && LT_DLIS_RESIDENT (handles)) + { + handles = handles->next; + } + + /* close all modules */ + for (level = 1; handles; ++level) + { + lt_dlhandle cur = handles; + int saw_nonresident = 0; + + while (cur) + { + lt_dlhandle tmp = cur; + cur = cur->next; + if (!LT_DLIS_RESIDENT (tmp)) + saw_nonresident = 1; + if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level) + { + if (lt_dlclose (tmp)) + { + ++errors; + } + } + } + /* done if only resident modules are left */ + if (!saw_nonresident) + break; + } + + /* close all loaders */ + while (loader) + { + lt_dlloader *next = loader->next; + lt_user_data data = loader->dlloader_data; + if (loader->dlloader_exit && loader->dlloader_exit (data)) + { + ++errors; + } + + LT_DLMEM_REASSIGN (loader, next); + } + loaders = NULL; + } + + done: + LT_DLMUTEX_UNLOCK (); + return errors; +} + +static int +tryall_dlopen (handle, filename) + lt_dlhandle *handle; + const char *filename; +{ + lt_dlhandle cur; + lt_dlloader *loader; + const char *saved_error; + int errors = 0; + + LT_DLMUTEX_GETERROR (saved_error); + LT_DLMUTEX_LOCK (); + + cur = handles; + loader = loaders; + + /* check whether the module was already opened */ + while (cur) + { + /* try to dlopen the program itself? */ + if (!cur->info.filename && !filename) + { + break; + } + + if (cur->info.filename && filename + && strcmp (cur->info.filename, filename) == 0) + { + break; + } + + cur = cur->next; + } + + if (cur) + { + ++cur->info.ref_count; + *handle = cur; + goto done; + } + + cur = *handle; + if (filename) + { + cur->info.filename = lt_estrdup (filename); + if (!cur->info.filename) + { + ++errors; + goto done; + } + } + else + { + cur->info.filename = NULL; + } + + while (loader) + { + lt_user_data data = loader->dlloader_data; + + cur->module = loader->module_open (data, filename); + + if (cur->module != NULL) + { + break; + } + loader = loader->next; + } + + if (!loader) + { + LT_DLFREE (cur->info.filename); + ++errors; + goto done; + } + + cur->loader = loader; + LT_DLMUTEX_SETERROR (saved_error); + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static int +tryall_dlopen_module (handle, prefix, dirname, dlname) + lt_dlhandle *handle; + const char *prefix; + const char *dirname; + const char *dlname; +{ + int error = 0; + char *filename = NULL; + size_t filename_len = 0; + size_t dirname_len = LT_STRLEN (dirname); + + assert (handle); + assert (dirname); + assert (dlname); +#ifdef LT_DIRSEP_CHAR + /* Only canonicalized names (i.e. with DIRSEP chars already converted) + should make it into this function: */ + assert (strchr (dirname, LT_DIRSEP_CHAR) == NULL); +#endif + + if (dirname_len > 0) + if (dirname[dirname_len -1] == '/') + --dirname_len; + filename_len = dirname_len + 1 + LT_STRLEN (dlname); + + /* Allocate memory, and combine DIRNAME and MODULENAME into it. + The PREFIX (if any) is handled below. */ + filename = LT_EMALLOC (char, dirname_len + 1 + filename_len + 1); + if (!filename) + return 1; + + sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname); + + /* Now that we have combined DIRNAME and MODULENAME, if there is + also a PREFIX to contend with, simply recurse with the arguments + shuffled. Otherwise, attempt to open FILENAME as a module. */ + if (prefix) + { + error += tryall_dlopen_module (handle, + (const char *) 0, prefix, filename); + } + else if (tryall_dlopen (handle, filename) != 0) + { + ++error; + } + + LT_DLFREE (filename); + return error; +} + +static int +find_module (handle, dir, libdir, dlname, old_name, installed) + lt_dlhandle *handle; + const char *dir; + const char *libdir; + const char *dlname; + const char *old_name; + int installed; +{ + /* Try to open the old library first; if it was dlpreopened, + we want the preopened version of it, even if a dlopenable + module is available. */ + if (old_name && tryall_dlopen (handle, old_name) == 0) + { + return 0; + } + + /* Try to open the dynamic library. */ + if (dlname) + { + /* try to open the installed module */ + if (installed && libdir) + { + if (tryall_dlopen_module (handle, + (const char *) 0, libdir, dlname) == 0) + return 0; + } + + /* try to open the not-installed module */ + if (!installed) + { + if (tryall_dlopen_module (handle, dir, objdir, dlname) == 0) + return 0; + } + + /* maybe it was moved to another directory */ + { + if (tryall_dlopen_module (handle, + (const char *) 0, dir, dlname) == 0) + return 0; + } + } + + return 1; +} + + +static int +canonicalize_path (path, pcanonical) + const char *path; + char **pcanonical; +{ + char *canonical = NULL; + + assert (path && *path); + assert (pcanonical); + + canonical = LT_EMALLOC (char, 1+ LT_STRLEN (path)); + if (!canonical) + return 1; + + { + size_t dest = 0; + size_t src; + for (src = 0; path[src] != LT_EOS_CHAR; ++src) + { + /* Path separators are not copied to the beginning or end of + the destination, or if another separator would follow + immediately. */ + if (path[src] == LT_PATHSEP_CHAR) + { + if ((dest == 0) + || (path[1+ src] == LT_PATHSEP_CHAR) + || (path[1+ src] == LT_EOS_CHAR)) + continue; + } + + /* Anything other than a directory separator is copied verbatim. */ + if ((path[src] != '/') +#ifdef LT_DIRSEP_CHAR + && (path[src] != LT_DIRSEP_CHAR) +#endif + ) + { + canonical[dest++] = path[src]; + } + /* Directory separators are converted and copied only if they are + not at the end of a path -- i.e. before a path separator or + NULL terminator. */ + else if ((path[1+ src] != LT_PATHSEP_CHAR) + && (path[1+ src] != LT_EOS_CHAR) +#ifdef LT_DIRSEP_CHAR + && (path[1+ src] != LT_DIRSEP_CHAR) +#endif + && (path[1+ src] != '/')) + { + canonical[dest++] = '/'; + } + } + + /* Add an end-of-string marker at the end. */ + canonical[dest] = LT_EOS_CHAR; + } + + /* Assign new value. */ + *pcanonical = canonical; + + return 0; +} + +static int +argzize_path (path, pargz, pargz_len) + const char *path; + char **pargz; + size_t *pargz_len; +{ + error_t error; + + assert (path); + assert (pargz); + assert (pargz_len); + + if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len))) + { + switch (error) + { + case ENOMEM: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + break; + default: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); + break; + } + + return 1; + } + + return 0; +} + +/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element + of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns + non-zero or all elements are exhausted. If BASE_NAME is non-NULL, + it is appended to each SEARCH_PATH element before FUNC is called. */ +static int +foreach_dirinpath (search_path, base_name, func, data1, data2) + const char *search_path; + const char *base_name; + foreach_callback_func *func; + lt_ptr data1; + lt_ptr data2; +{ + int result = 0; + int filenamesize = 0; + size_t lenbase = LT_STRLEN (base_name); + size_t argz_len = 0; + char *argz = NULL; + char *filename = NULL; + char *canonical = NULL; + + LT_DLMUTEX_LOCK (); + + if (!search_path || !*search_path) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + goto cleanup; + } + + if (canonicalize_path (search_path, &canonical) != 0) + goto cleanup; + + if (argzize_path (canonical, &argz, &argz_len) != 0) + goto cleanup; + + { + char *dir_name = NULL; + while ((dir_name = argz_next (argz, argz_len, dir_name))) + { + size_t lendir = LT_STRLEN (dir_name); + + if (lendir +1 +lenbase >= filenamesize) + { + LT_DLFREE (filename); + filenamesize = lendir +1 +lenbase +1; /* "/d" + '/' + "f" + '\0' */ + filename = LT_EMALLOC (char, filenamesize); + if (!filename) + goto cleanup; + } + + assert (filenamesize > lendir); + strcpy (filename, dir_name); + + if (base_name && *base_name) + { + if (filename[lendir -1] != '/') + filename[lendir++] = '/'; + strcpy (filename +lendir, base_name); + } + + if ((result = (*func) (filename, data1, data2))) + { + break; + } + } + } + + cleanup: + LT_DLFREE (argz); + LT_DLFREE (canonical); + LT_DLFREE (filename); + + LT_DLMUTEX_UNLOCK (); + + return result; +} + +/* If FILEPATH can be opened, store the name of the directory component + in DATA1, and the opened FILE* structure address in DATA2. Otherwise + DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */ +static int +find_file_callback (filename, data1, data2) + char *filename; + lt_ptr data1; + lt_ptr data2; +{ + char **pdir = (char **) data1; + FILE **pfile = (FILE **) data2; + int is_done = 0; + + assert (filename && *filename); + assert (pdir); + assert (pfile); + + if ((*pfile = fopen (filename, LT_READTEXT_MODE))) + { + char *dirend = strrchr (filename, '/'); + + if (dirend > filename) + *dirend = LT_EOS_CHAR; + + LT_DLFREE (*pdir); + *pdir = lt_estrdup (filename); + is_done = (*pdir == NULL) ? -1 : 1; + } + + return is_done; +} + +static FILE * +find_file (search_path, base_name, pdir) + const char *search_path; + const char *base_name; + char **pdir; +{ + FILE *file = NULL; + + foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file); + + return file; +} + +static int +find_handle_callback (filename, data, ignored) + char *filename; + lt_ptr data; + lt_ptr ignored; +{ + lt_dlhandle *handle = (lt_dlhandle *) data; + int notfound = access (filename, R_OK); + + /* Bail out if file cannot be read... */ + if (notfound) + return 0; + + /* Try to dlopen the file, but do not continue searching in any + case. */ + if (tryall_dlopen (handle, filename) != 0) + *handle = NULL; + + return 1; +} + +/* If HANDLE was found return it, otherwise return 0. If HANDLE was + found but could not be opened, *HANDLE will be set to 0. */ +static lt_dlhandle * +find_handle (search_path, base_name, handle) + const char *search_path; + const char *base_name; + lt_dlhandle *handle; +{ + if (!search_path) + return 0; + + if (!foreach_dirinpath (search_path, base_name, find_handle_callback, + handle, 0)) + return 0; + + return handle; +} + +static int +load_deplibs (handle, deplibs) + lt_dlhandle handle; + char *deplibs; +{ +#if LTDL_DLOPEN_DEPLIBS + char *p, *save_search_path = NULL; + int depcount = 0; + int i; + char **names = NULL; +#endif + int errors = 0; + + handle->depcount = 0; + +#if LTDL_DLOPEN_DEPLIBS + if (!deplibs) + { + return errors; + } + ++errors; + + LT_DLMUTEX_LOCK (); + if (user_search_path) + { + save_search_path = lt_estrdup (user_search_path); + if (!save_search_path) + goto cleanup; + } + + /* extract search paths and count deplibs */ + p = deplibs; + while (*p) + { + if (!isspace ((int) *p)) + { + char *end = p+1; + while (*end && !isspace((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0) + { + char save = *end; + *end = '\0'; /* set a temporary string terminator */ + if (lt_dladdsearchdir(p+2)) + { + goto cleanup; + } + *end = save; + } + else + { + ++depcount; + } + + p = end; + } + else + { + ++p; + } + } + + /* restore the old search path */ + LT_DLFREE (user_search_path); + user_search_path = save_search_path; + + LT_DLMUTEX_UNLOCK (); + + if (!depcount) + { + errors = 0; + goto cleanup; + } + + names = LT_EMALLOC (char *, depcount * sizeof (char*)); + if (!names) + goto cleanup; + + /* now only extract the actual deplibs */ + depcount = 0; + p = deplibs; + while (*p) + { + if (isspace ((int) *p)) + { + ++p; + } + else + { + char *end = p+1; + while (*end && !isspace ((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0) + { + char *name; + char save = *end; + *end = '\0'; /* set a temporary string terminator */ + if (strncmp(p, "-l", 2) == 0) + { + size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2); + name = LT_EMALLOC (char, 1+ name_len); + if (name) + sprintf (name, "lib%s", p+2); + } + else + name = lt_estrdup(p); + + if (!name) + goto cleanup_names; + + names[depcount++] = name; + *end = save; + } + p = end; + } + } + + /* load the deplibs (in reverse order) + At this stage, don't worry if the deplibs do not load correctly, + they may already be statically linked into the loading application + for instance. There will be a more enlightening error message + later on if the loaded module cannot resolve all of its symbols. */ + if (depcount) + { + int j = 0; + + handle->deplibs = (lt_dlhandle*) LT_EMALLOC (lt_dlhandle *, depcount); + if (!handle->deplibs) + goto cleanup; + + for (i = 0; i < depcount; ++i) + { + handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]); + if (handle->deplibs[j]) + { + ++j; + } + } + + handle->depcount = j; /* Number of successfully loaded deplibs */ + errors = 0; + } + + cleanup_names: + for (i = 0; i < depcount; ++i) + { + LT_DLFREE (names[i]); + } + + cleanup: + LT_DLFREE (names); +#endif + + return errors; +} + +static int +unload_deplibs (handle) + lt_dlhandle handle; +{ + int i; + int errors = 0; + + if (handle->depcount) + { + for (i = 0; i < handle->depcount; ++i) + { + if (!LT_DLIS_RESIDENT (handle->deplibs[i])) + { + errors += lt_dlclose (handle->deplibs[i]); + } + } + } + + return errors; +} + +static int +trim (dest, str) + char **dest; + const char *str; +{ + /* remove the leading and trailing "'" from str + and store the result in dest */ + const char *end = strrchr (str, '\''); + size_t len = LT_STRLEN (str); + char *tmp; + + LT_DLFREE (*dest); + + if (len > 3 && str[0] == '\'') + { + tmp = LT_EMALLOC (char, end - str); + if (!tmp) + return 1; + + strncpy(tmp, &str[1], (end - str) - 1); + tmp[len-3] = LT_EOS_CHAR; + *dest = tmp; + } + else + { + *dest = NULL; + } + + return 0; +} + +static int +free_vars (dlname, oldname, libdir, deplibs) + char *dlname; + char *oldname; + char *libdir; + char *deplibs; +{ + LT_DLFREE (dlname); + LT_DLFREE (oldname); + LT_DLFREE (libdir); + LT_DLFREE (deplibs); + + return 0; +} + +static int +try_dlopen (phandle, filename) + lt_dlhandle *phandle; + const char *filename; +{ + const char * ext = NULL; + const char * saved_error = NULL; + char * canonical = NULL; + char * base_name = NULL; + char * dir = NULL; + char * name = NULL; + int errors = 0; + lt_dlhandle newhandle; + + assert (phandle); + assert (*phandle == NULL); + + LT_DLMUTEX_GETERROR (saved_error); + + /* dlopen self? */ + if (!filename) + { + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + return 1; + + memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); + newhandle = *phandle; + + /* lt_dlclose()ing yourself is very bad! Disallow it. */ + LT_DLSET_FLAG (*phandle, LT_DLRESIDENT_FLAG); + + if (tryall_dlopen (&newhandle, 0) != 0) + { + LT_DLFREE (*phandle); + return 1; + } + + goto register_handle; + } + + assert (filename && *filename); + + /* Doing this immediately allows internal functions to safely + assume only canonicalized paths are passed. */ + if (canonicalize_path (filename, &canonical) != 0) + { + ++errors; + goto cleanup; + } + + /* If the canonical module name is a path (relative or absolute) + then split it into a directory part and a name part. */ + base_name = strrchr (canonical, '/'); + if (base_name) + { + size_t dirlen = (1+ base_name) - canonical; + + dir = LT_EMALLOC (char, 1+ dirlen); + if (!dir) + { + ++errors; + goto cleanup; + } + + strncpy (dir, canonical, dirlen); + dir[dirlen] = LT_EOS_CHAR; + + ++base_name; + } + else + LT_DLMEM_REASSIGN (base_name, canonical); + + assert (base_name && *base_name); + + /* Check whether we are opening a libtool module (.la extension). */ + ext = strrchr (base_name, '.'); + if (ext && strcmp (ext, archive_ext) == 0) + { + /* this seems to be a libtool module */ + FILE * file = NULL; + char * dlname = NULL; + char * old_name = NULL; + char * libdir = NULL; + char * deplibs = NULL; + char * line = NULL; + size_t line_len; + + /* if we can't find the installed flag, it is probably an + installed libtool archive, produced with an old version + of libtool */ + int installed = 1; + + /* extract the module name from the file name */ + name = LT_EMALLOC (char, ext - base_name + 1); + if (!name) + { + ++errors; + goto cleanup; + } + + /* canonicalize the module name */ + { + size_t i; + for (i = 0; i < ext - base_name; ++i) + { + if (isalnum ((int)(base_name[i]))) + { + name[i] = base_name[i]; + } + else + { + name[i] = '_'; + } + } + name[ext - base_name] = LT_EOS_CHAR; + } + + /* Now try to open the .la file. If there is no directory name + component, try to find it first in user_search_path and then other + prescribed paths. Otherwise (or in any case if the module was not + yet found) try opening just the module name as passed. */ + if (!dir) + { + const char *search_path; + + LT_DLMUTEX_LOCK (); + search_path = user_search_path; + if (search_path) + file = find_file (user_search_path, base_name, &dir); + LT_DLMUTEX_UNLOCK (); + + if (!file) + { + search_path = getenv (LTDL_SEARCHPATH_VAR); + if (search_path) + file = find_file (search_path, base_name, &dir); + } + +#ifdef LTDL_SHLIBPATH_VAR + if (!file) + { + search_path = getenv (LTDL_SHLIBPATH_VAR); + if (search_path) + file = find_file (search_path, base_name, &dir); + } +#endif +#ifdef LTDL_SYSSEARCHPATH + if (!file && sys_search_path) + { + file = find_file (sys_search_path, base_name, &dir); + } +#endif + } + if (!file) + { + file = fopen (filename, LT_READTEXT_MODE); + } + + /* If we didn't find the file by now, it really isn't there. Set + the status flag, and bail out. */ + if (!file) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + ++errors; + goto cleanup; + } + + line_len = LT_FILENAME_MAX; + line = LT_EMALLOC (char, line_len); + if (!line) + { + fclose (file); + ++errors; + goto cleanup; + } + + /* read the .la file */ + while (!feof (file)) + { + if (!fgets (line, (int) line_len, file)) + { + break; + } + + /* Handle the case where we occasionally need to read a line + that is longer than the initial buffer size. */ + while ((line[LT_STRLEN(line) -1] != '\n') && (!feof (file))) + { + line = LT_DLREALLOC (char, line, line_len *2); + if (!fgets (&line[line_len -1], (int) line_len +1, file)) + { + break; + } + line_len *= 2; + } + + if (line[0] == '\n' || line[0] == '#') + { + continue; + } + +#undef STR_DLNAME +#define STR_DLNAME "dlname=" + if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0) + { + errors += trim (&dlname, &line[sizeof (STR_DLNAME) - 1]); + } + +#undef STR_OLD_LIBRARY +#define STR_OLD_LIBRARY "old_library=" + else if (strncmp (line, STR_OLD_LIBRARY, + sizeof (STR_OLD_LIBRARY) - 1) == 0) + { + errors += trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]); + } +#undef STR_LIBDIR +#define STR_LIBDIR "libdir=" + else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0) + { + errors += trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]); + } + +#undef STR_DL_DEPLIBS +#define STR_DL_DEPLIBS "dependency_libs=" + else if (strncmp (line, STR_DL_DEPLIBS, + sizeof (STR_DL_DEPLIBS) - 1) == 0) + { + errors += trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]); + } + else if (strcmp (line, "installed=yes\n") == 0) + { + installed = 1; + } + else if (strcmp (line, "installed=no\n") == 0) + { + installed = 0; + } + +#undef STR_LIBRARY_NAMES +#define STR_LIBRARY_NAMES "library_names=" + else if (! dlname && strncmp (line, STR_LIBRARY_NAMES, + sizeof (STR_LIBRARY_NAMES) - 1) == 0) + { + char *last_libname; + errors += trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]); + if (!errors + && dlname + && (last_libname = strrchr (dlname, ' ')) != NULL) + { + last_libname = lt_estrdup (last_libname + 1); + if (!last_libname) + { + ++errors; + goto cleanup; + } + LT_DLMEM_REASSIGN (dlname, last_libname); + } + } + + if (errors) + break; + } + + fclose (file); + LT_DLFREE (line); + + /* allocate the handle */ + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + ++errors; + + if (errors) + { + free_vars (dlname, old_name, libdir, deplibs); + LT_DLFREE (*phandle); + goto cleanup; + } + + assert (*phandle); + + memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); + if (load_deplibs (*phandle, deplibs) == 0) + { + newhandle = *phandle; + /* find_module may replace newhandle */ + if (find_module (&newhandle, dir, libdir, dlname, old_name, installed)) + { + unload_deplibs (*phandle); + ++errors; + } + } + else + { + ++errors; + } + + free_vars (dlname, old_name, libdir, deplibs); + if (errors) + { + LT_DLFREE (*phandle); + goto cleanup; + } + + if (*phandle != newhandle) + { + unload_deplibs (*phandle); + } + } + else + { + /* not a libtool module */ + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + { + ++errors; + goto cleanup; + } + + memset (*phandle, 0, sizeof (struct lt_dlhandle_struct)); + newhandle = *phandle; + + /* If the module has no directory name component, try to find it + first in user_search_path and then other prescribed paths. + Otherwise (or in any case if the module was not yet found) try + opening just the module name as passed. */ + if ((dir || (!find_handle (user_search_path, base_name, &newhandle) + && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name, + &newhandle) +#ifdef LTDL_SHLIBPATH_VAR + && !find_handle (getenv (LTDL_SHLIBPATH_VAR), base_name, + &newhandle) +#endif +#ifdef LTDL_SYSSEARCHPATH + && !find_handle (sys_search_path, base_name, &newhandle) +#endif + ))) + { + if (tryall_dlopen (&newhandle, filename) != 0) + { + newhandle = NULL; + } + } + + if (!newhandle) + { + LT_DLFREE (*phandle); + ++errors; + goto cleanup; + } + } + + register_handle: + LT_DLMEM_REASSIGN (*phandle, newhandle); + + if ((*phandle)->info.ref_count == 0) + { + (*phandle)->info.ref_count = 1; + LT_DLMEM_REASSIGN ((*phandle)->info.name, name); + + LT_DLMUTEX_LOCK (); + (*phandle)->next = handles; + handles = *phandle; + LT_DLMUTEX_UNLOCK (); + } + + LT_DLMUTEX_SETERROR (saved_error); + + cleanup: + LT_DLFREE (dir); + LT_DLFREE (name); + LT_DLFREE (canonical); + + return errors; +} + +lt_dlhandle +lt_dlopen (filename) + const char *filename; +{ + lt_dlhandle handle = NULL; + + /* Just incase we missed a code path in try_dlopen() that reports + an error, but forgets to reset handle... */ + if (try_dlopen (&handle, filename) != 0) + return 0; + + return handle; +} + +/* If the last error messge store was `FILE_NOT_FOUND', then return + non-zero. */ +static int +file_not_found () +{ + const char *error = NULL; + + LT_DLMUTEX_GETERROR (error); + if (error == LT_DLSTRERROR (FILE_NOT_FOUND)) + return 1; + + return 0; +} + +/* If FILENAME has an ARCHIVE_EXT or SHLIB_EXT extension, try to + open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT, + and if a file is still not found try again with SHLIB_EXT appended + instead. */ +lt_dlhandle +lt_dlopenext (filename) + const char *filename; +{ + lt_dlhandle handle = NULL; + char * tmp = NULL; + char * ext = NULL; + size_t len; + int errors = 0; + + if (!filename) + { + return lt_dlopen (filename); + } + + assert (filename); + + len = LT_STRLEN (filename); + ext = strrchr (filename, '.'); + + /* If FILENAME already bears a suitable extension, there is no need + to try appending additional extensions. */ + if (ext && ((strcmp (ext, archive_ext) == 0) +#ifdef LTDL_SHLIB_EXT + || (strcmp (ext, shlib_ext) == 0) +#endif + )) + { + return lt_dlopen (filename); + } + + /* First try appending ARCHIVE_EXT. */ + tmp = LT_EMALLOC (char, len + LT_STRLEN (archive_ext) + 1); + if (!tmp) + return 0; + + strcpy (tmp, filename); + strcat (tmp, archive_ext); + errors = try_dlopen (&handle, tmp); + + /* If we found FILENAME, stop searching -- whether we were able to + load the file as a module or not. If the file exists but loading + failed, it is better to return an error message here than to + report FILE_NOT_FOUND when the alternatives (foo.so etc) are not + in the module search path. */ + if (handle || ((errors > 0) && !file_not_found ())) + { + LT_DLFREE (tmp); + return handle; + } + +#ifdef LTDL_SHLIB_EXT + /* Try appending SHLIB_EXT. */ + if (LT_STRLEN (shlib_ext) > LT_STRLEN (archive_ext)) + { + LT_DLFREE (tmp); + tmp = LT_EMALLOC (char, len + LT_STRLEN (shlib_ext) + 1); + if (!tmp) + return 0; + + strcpy (tmp, filename); + } + else + { + tmp[len] = LT_EOS_CHAR; + } + + strcat(tmp, shlib_ext); + errors = try_dlopen (&handle, tmp); + + /* As before, if the file was found but loading failed, return now + with the current error message. */ + if (handle || ((errors > 0) && !file_not_found ())) + { + LT_DLFREE (tmp); + return handle; + } +#endif + + /* Still here? Then we really did fail to locate any of the file + names we tried. */ + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + LT_DLFREE (tmp); + return 0; +} + + +static int +lt_argz_insert (pargz, pargz_len, before, entry) + char **pargz; + size_t *pargz_len; + char *before; + const char *entry; +{ + error_t error; + + if ((error = argz_insert (pargz, pargz_len, before, entry))) + { + switch (error) + { + case ENOMEM: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + break; + default: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); + break; + } + return 1; + } + + return 0; +} + +static int +lt_argz_insertinorder (pargz, pargz_len, entry) + char **pargz; + size_t *pargz_len; + const char *entry; +{ + char *before = NULL; + + assert (pargz); + assert (pargz_len); + assert (entry && *entry); + + if (*pargz) + while ((before = argz_next (*pargz, *pargz_len, before))) + { + int cmp = strcmp (entry, before); + + if (cmp < 0) break; + if (cmp == 0) return 0; /* No duplicates! */ + } + + return lt_argz_insert (pargz, pargz_len, before, entry); +} + +static int +lt_argz_insertdir (pargz, pargz_len, dirnam, dp) + char **pargz; + size_t *pargz_len; + const char *dirnam; + struct dirent *dp; +{ + char *buf = NULL; + size_t buf_len = 0; + char *end = NULL; + size_t end_offset = 0; + size_t dir_len = 0; + int errors = 0; + + assert (pargz); + assert (pargz_len); + assert (dp); + + dir_len = LT_STRLEN (dirnam); + end = dp->d_name + LT_D_NAMLEN(dp); + + /* Ignore version numbers. */ + { + char *p; + for (p = end; p -1 > dp->d_name; --p) + if (strchr (".0123456789", p[-1]) == 0) + break; + + if (*p == '.') + end = p; + } + + /* Ignore filename extension. */ + { + char *p; + for (p = end -1; p > dp->d_name; --p) + if (*p == '.') + { + end = p; + break; + } + } + + /* Prepend the directory name. */ + end_offset = end - dp->d_name; + buf_len = dir_len + 1+ end_offset; + buf = LT_EMALLOC (char, 1+ buf_len); + if (!buf) + return ++errors; + + assert (buf); + + strcpy (buf, dirnam); + strcat (buf, "/"); + strncat (buf, dp->d_name, end_offset); + buf[buf_len] = LT_EOS_CHAR; + + /* Try to insert (in order) into ARGZ/ARGZ_LEN. */ + if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0) + ++errors; + + LT_DLFREE (buf); + + return errors; +} + +static int +list_files_by_dir (dirnam, pargz, pargz_len) + const char *dirnam; + char **pargz; + size_t *pargz_len; +{ + DIR *dirp = NULL; + int errors = 0; + + assert (dirnam && *dirnam); + assert (pargz); + assert (pargz_len); + assert (dirnam[LT_STRLEN(dirnam) -1] != '/'); + + dirp = opendir (dirnam); + if (dirp) + { + struct dirent *dp = NULL; + + while ((dp = readdir (dirp))) + if (dp->d_name[0] != '.') + if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp)) + { + ++errors; + break; + } + + closedir (dirp); + } + else + ++errors; + + return errors; +} + + +/* If there are any files in DIRNAME, call the function passed in + DATA1 (with the name of each file and DATA2 as arguments). */ +static int +foreachfile_callback (dirname, data1, data2) + char *dirname; + lt_ptr data1; + lt_ptr data2; +{ + int (*func) LT_PARAMS((const char *filename, lt_ptr data)) + = (int (*) LT_PARAMS((const char *filename, lt_ptr data))) data1; + + int is_done = 0; + char *argz = NULL; + size_t argz_len = 0; + + if (list_files_by_dir (dirname, &argz, &argz_len) != 0) + goto cleanup; + if (!argz) + goto cleanup; + + { + char *filename = NULL; + while ((filename = argz_next (argz, argz_len, filename))) + if ((is_done = (*func) (filename, data2))) + break; + } + + cleanup: + LT_DLFREE (argz); + + return is_done; +} + + +/* Call FUNC for each unique extensionless file in SEARCH_PATH, along + with DATA. The filenames passed to FUNC would be suitable for + passing to lt_dlopenext. The extensions are stripped so that + individual modules do not generate several entries (e.g. libfoo.la, + libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL, + then the same directories that lt_dlopen would search are examined. */ +int +lt_dlforeachfile (search_path, func, data) + const char *search_path; + int (*func) LT_PARAMS ((const char *filename, lt_ptr data)); + lt_ptr data; +{ + int is_done = 0; + + if (search_path) + { + /* If a specific path was passed, search only the directories + listed in it. */ + is_done = foreach_dirinpath (search_path, 0, + foreachfile_callback, func, data); + } + else + { + /* Otherwise search the default paths. */ + is_done = foreach_dirinpath (user_search_path, 0, + foreachfile_callback, func, data); + if (!is_done) + { + is_done = foreach_dirinpath (getenv("LTDL_LIBRARY_PATH"), 0, + foreachfile_callback, func, data); + } + +#ifdef LTDL_SHLIBPATH_VAR + if (!is_done) + { + is_done = foreach_dirinpath (getenv(LTDL_SHLIBPATH_VAR), 0, + foreachfile_callback, func, data); + } +#endif +#ifdef LTDL_SYSSEARCHPATH + if (!is_done) + { + is_done = foreach_dirinpath (getenv(LTDL_SYSSEARCHPATH), 0, + foreachfile_callback, func, data); + } +#endif + } + + return is_done; +} + +int +lt_dlclose (handle) + lt_dlhandle handle; +{ + lt_dlhandle cur, last; + int errors = 0; + + LT_DLMUTEX_LOCK (); + + /* check whether the handle is valid */ + last = cur = handles; + while (cur && handle != cur) + { + last = cur; + cur = cur->next; + } + + if (!cur) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + goto done; + } + + handle->info.ref_count--; + + /* Note that even with resident modules, we must track the ref_count + correctly incase the user decides to reset the residency flag + later (even though the API makes no provision for that at the + moment). */ + if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle)) + { + lt_user_data data = handle->loader->dlloader_data; + + if (handle != handles) + { + last->next = handle->next; + } + else + { + handles = handle->next; + } + + errors += handle->loader->module_close (data, handle->module); + errors += unload_deplibs(handle); + + /* It is up to the callers to free the data itself. */ + LT_DLFREE (handle->caller_data); + + LT_DLFREE (handle->info.filename); + LT_DLFREE (handle->info.name); + LT_DLFREE (handle); + + goto done; + } + + if (LT_DLIS_RESIDENT (handle)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE)); + ++errors; + } + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_ptr +lt_dlsym (handle, symbol) + lt_dlhandle handle; + const char *symbol; +{ + size_t lensym; + char lsym[LT_SYMBOL_LENGTH]; + char *sym; + lt_ptr address; + lt_user_data data; + + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + if (!symbol) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + return 0; + } + + lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->loader->sym_prefix) + + LT_STRLEN (handle->info.name); + + if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH) + { + sym = lsym; + } + else + { + sym = LT_EMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1); + if (!sym) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW)); + return 0; + } + } + + data = handle->loader->dlloader_data; + if (handle->info.name) + { + const char *saved_error; + + LT_DLMUTEX_GETERROR (saved_error); + + /* this is a libtool module */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, handle->info.name); + } + else + { + strcpy(sym, handle->info.name); + } + + strcat(sym, "_LTX_"); + strcat(sym, symbol); + + /* try "modulename_LTX_symbol" */ + address = handle->loader->find_sym (data, handle->module, sym); + if (address) + { + if (sym != lsym) + { + LT_DLFREE (sym); + } + return address; + } + LT_DLMUTEX_SETERROR (saved_error); + } + + /* otherwise try "symbol" */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, symbol); + } + else + { + strcpy(sym, symbol); + } + + address = handle->loader->find_sym (data, handle->module, sym); + if (sym != lsym) + { + LT_DLFREE (sym); + } + + return address; +} + +const char * +lt_dlerror () +{ + const char *error; + + LT_DLMUTEX_GETERROR (error); + LT_DLMUTEX_SETERROR (0); + + return error ? error : LT_DLSTRERROR (UNKNOWN); +} + +static int +lt_dlpath_insertdir (ppath, before, dir) + char **ppath; + char *before; + const char *dir; +{ + int errors = 0; + char *canonical = NULL; + char *argz = NULL; + size_t argz_len = 0; + + assert (ppath); + assert (dir && *dir); + + if (canonicalize_path (dir, &canonical) != 0) + { + ++errors; + goto cleanup; + } + + assert (canonical && *canonical); + + /* If *PPATH is empty, set it to DIR. */ + if (*ppath == NULL) + { + assert (!before); /* BEFORE cannot be set without PPATH. */ + assert (dir); /* Without DIR, don't call this function! */ + + *ppath = lt_estrdup (dir); + if (*ppath == NULL) + ++errors; + + return errors; + } + + assert (ppath && *ppath); + + if (argzize_path (*ppath, &argz, &argz_len) != 0) + { + ++errors; + goto cleanup; + } + + /* Convert BEFORE into an equivalent offset into ARGZ. This only works + if *PPATH is already canonicalized, and hence does not change length + with respect to ARGZ. We canonicalize each entry as it is added to + the search path, and don't call this function with (uncanonicalized) + user paths, so this is a fair assumption. */ + if (before) + { + assert (*ppath <= before); + assert (before - *ppath <= strlen (*ppath)); + + before = before - *ppath + argz; + } + + if (lt_argz_insert (&argz, &argz_len, before, dir) != 0) + { + ++errors; + goto cleanup; + } + + argz_stringify (argz, argz_len, LT_PATHSEP_CHAR); + LT_DLMEM_REASSIGN (*ppath, argz); + + cleanup: + LT_DLFREE (canonical); + LT_DLFREE (argz); + + return errors; +} + +int +lt_dladdsearchdir (search_dir) + const char *search_dir; +{ + int errors = 0; + + if (search_dir && *search_dir) + { + LT_DLMUTEX_LOCK (); + if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0) + ++errors; + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlinsertsearchdir (before, search_dir) + const char *before; + const char *search_dir; +{ + int errors = 0; + + if (before) + { + LT_DLMUTEX_LOCK (); + if ((before < user_search_path) + || (before >= user_search_path + LT_STRLEN (user_search_path))) + { + LT_DLMUTEX_UNLOCK (); + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_POSITION)); + return 1; + } + LT_DLMUTEX_UNLOCK (); + } + + if (search_dir && *search_dir) + { + LT_DLMUTEX_LOCK (); + if (lt_dlpath_insertdir (&user_search_path, + (char *) before, search_dir) != 0) + { + ++errors; + } + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlsetsearchpath (search_path) + const char *search_path; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + LT_DLFREE (user_search_path); + LT_DLMUTEX_UNLOCK (); + + if (!search_path || !LT_STRLEN (search_path)) + { + return errors; + } + + LT_DLMUTEX_LOCK (); + if (canonicalize_path (search_path, &user_search_path) != 0) + ++errors; + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +const char * +lt_dlgetsearchpath () +{ + const char *saved_path; + + LT_DLMUTEX_LOCK (); + saved_path = user_search_path; + LT_DLMUTEX_UNLOCK (); + + return saved_path; +} + +int +lt_dlmakeresident (handle) + lt_dlhandle handle; +{ + int errors = 0; + + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + } + else + { + LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); + } + + return errors; +} + +int +lt_dlisresident (handle) + lt_dlhandle handle; +{ + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return -1; + } + + return LT_DLIS_RESIDENT (handle); +} + + + + +/* --- MODULE INFORMATION --- */ + +const lt_dlinfo * +lt_dlgetinfo (handle) + lt_dlhandle handle; +{ + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + return &(handle->info); +} + +lt_dlhandle +lt_dlhandle_next (place) + lt_dlhandle place; +{ + return place ? place->next : handles; +} + +int +lt_dlforeach (func, data) + int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data)); + lt_ptr data; +{ + int errors = 0; + lt_dlhandle cur; + + LT_DLMUTEX_LOCK (); + + cur = handles; + while (cur) + { + lt_dlhandle tmp = cur; + + cur = cur->next; + if ((*func) (tmp, data)) + { + ++errors; + break; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_dlcaller_id +lt_dlcaller_register () +{ + static lt_dlcaller_id last_caller_id = 0; + int result; + + LT_DLMUTEX_LOCK (); + result = ++last_caller_id; + LT_DLMUTEX_UNLOCK (); + + return result; +} + +lt_ptr +lt_dlcaller_set_data (key, handle, data) + lt_dlcaller_id key; + lt_dlhandle handle; + lt_ptr data; +{ + int n_elements = 0; + lt_ptr stale = NULL; + int i; + + /* This needs to be locked so that the caller data can be updated + simultaneously by different threads. */ + LT_DLMUTEX_LOCK (); + + if (handle->caller_data) + while (handle->caller_data[n_elements].key) + ++n_elements; + + for (i = 0; i < n_elements; ++i) + { + if (handle->caller_data[i].key == key) + { + stale = handle->caller_data[i].data; + break; + } + } + + /* Ensure that there is enough room in this handle's caller_data + array to accept a new element (and an empty end marker). */ + if (i == n_elements) + { + lt_caller_data *temp + = LT_DLREALLOC (lt_caller_data, handle->caller_data, 2+ n_elements); + + if (!temp) + { + stale = NULL; + goto done; + } + + handle->caller_data = temp; + + /* We only need this if we needed to allocate a new caller_data. */ + handle->caller_data[i].key = key; + handle->caller_data[1+ i].key = 0; + } + + handle->caller_data[i].data = data; + + done: + LT_DLMUTEX_UNLOCK (); + + return stale; +} + +lt_ptr +lt_dlcaller_get_data (key, handle) + lt_dlcaller_id key; + lt_dlhandle handle; +{ + lt_ptr result = (lt_ptr) 0; + + /* This needs to be locked so that the caller data isn't updated by + another thread part way through this function. */ + LT_DLMUTEX_LOCK (); + + /* Locate the index of the element with a matching KEY. */ + { + int i; + for (i = 0; handle->caller_data[i].key; ++i) + { + if (handle->caller_data[i].key == key) + { + result = handle->caller_data[i].data; + break; + } + } + } + + LT_DLMUTEX_UNLOCK (); + + return result; +} + + + +/* --- USER MODULE LOADER API --- */ + + +int +lt_dlloader_add (place, dlloader, loader_name) + lt_dlloader *place; + const struct lt_user_dlloader *dlloader; + const char *loader_name; +{ + int errors = 0; + lt_dlloader *node = NULL, *ptr = NULL; + + if ((dlloader == NULL) /* diagnose null parameters */ + || (dlloader->module_open == NULL) + || (dlloader->module_close == NULL) + || (dlloader->find_sym == NULL)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + /* Create a new dlloader node with copies of the user callbacks. */ + node = LT_EMALLOC (lt_dlloader, 1); + if (!node) + return 1; + + node->next = NULL; + node->loader_name = loader_name; + node->sym_prefix = dlloader->sym_prefix; + node->dlloader_exit = dlloader->dlloader_exit; + node->module_open = dlloader->module_open; + node->module_close = dlloader->module_close; + node->find_sym = dlloader->find_sym; + node->dlloader_data = dlloader->dlloader_data; + + LT_DLMUTEX_LOCK (); + if (!loaders) + { + /* If there are no loaders, NODE becomes the list! */ + loaders = node; + } + else if (!place) + { + /* If PLACE is not set, add NODE to the end of the + LOADERS list. */ + for (ptr = loaders; ptr->next; ptr = ptr->next) + { + /*NOWORK*/; + } + + ptr->next = node; + } + else if (loaders == place) + { + /* If PLACE is the first loader, NODE goes first. */ + node->next = place; + loaders = node; + } + else + { + /* Find the node immediately preceding PLACE. */ + for (ptr = loaders; ptr->next != place; ptr = ptr->next) + { + /*NOWORK*/; + } + + if (ptr->next != place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + ++errors; + } + else + { + /* Insert NODE between PTR and PLACE. */ + node->next = place; + ptr->next = node; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlloader_remove (loader_name) + const char *loader_name; +{ + lt_dlloader *place = lt_dlloader_find (loader_name); + lt_dlhandle handle; + int errors = 0; + + if (!place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + LT_DLMUTEX_LOCK (); + + /* Fail if there are any open modules which use this loader. */ + for (handle = handles; handle; handle = handle->next) + { + if (handle->loader == place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER)); + ++errors; + goto done; + } + } + + if (place == loaders) + { + /* PLACE is the first loader in the list. */ + loaders = loaders->next; + } + else + { + /* Find the loader before the one being removed. */ + lt_dlloader *prev; + for (prev = loaders; prev->next; prev = prev->next) + { + if (!strcmp (prev->next->loader_name, loader_name)) + { + break; + } + } + + place = prev->next; + prev->next = prev->next->next; + } + + if (place->dlloader_exit) + { + errors = place->dlloader_exit (place->dlloader_data); + } + + LT_DLFREE (place); + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_dlloader * +lt_dlloader_next (place) + lt_dlloader *place; +{ + lt_dlloader *next; + + LT_DLMUTEX_LOCK (); + next = place ? place->next : loaders; + LT_DLMUTEX_UNLOCK (); + + return next; +} + +const char * +lt_dlloader_name (place) + lt_dlloader *place; +{ + const char *name = NULL; + + if (place) + { + LT_DLMUTEX_LOCK (); + name = place ? place->loader_name : 0; + LT_DLMUTEX_UNLOCK (); + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return name; +} + +lt_user_data * +lt_dlloader_data (place) + lt_dlloader *place; +{ + lt_user_data *data = NULL; + + if (place) + { + LT_DLMUTEX_LOCK (); + data = place ? &(place->dlloader_data) : 0; + LT_DLMUTEX_UNLOCK (); + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return data; +} + +lt_dlloader * +lt_dlloader_find (loader_name) + const char *loader_name; +{ + lt_dlloader *place = NULL; + + LT_DLMUTEX_LOCK (); + for (place = loaders; place; place = place->next) + { + if (strcmp (place->loader_name, loader_name) == 0) + { + break; + } + } + LT_DLMUTEX_UNLOCK (); + + return place; +} diff --git a/libguile-ltdl/raw-ltdl.h b/libguile-ltdl/raw-ltdl.h new file mode 100644 index 000000000..632168bdb --- /dev/null +++ b/libguile-ltdl/raw-ltdl.h @@ -0,0 +1,344 @@ +/* ltdl.h -- generic dlopen functions + Copyright (C) 1998-2000, 2002 Free Software Foundation, Inc. + Originally by Thomas Tanner + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free +Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA +*/ + +/* Only include this header file once. */ +#ifndef LTDL_H +#define LTDL_H 1 + +#include "guile-ltdl.h" + +#include /* for size_t declaration */ + + +/* --- MACROS FOR PORTABILITY --- */ + +/* LTDL_BEGIN_C_DECLS should be used at the beginning of your declarations, + so that C++ compilers don't mangle their names. Use LTDL_END_C_DECLS at + the end of C declarations. */ +#ifdef __cplusplus +# define LT_BEGIN_C_DECLS extern "C" { +# define LT_END_C_DECLS } +#else +# define LT_BEGIN_C_DECLS /* empty */ +# define LT_END_C_DECLS /* empty */ +#endif + +LT_BEGIN_C_DECLS + + +/* LT_PARAMS is a macro used to wrap function prototypes, so that compilers + that don't understand ANSI C prototypes still work, and ANSI C + compilers can issue warnings about type mismatches. */ +#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(WIN32) || defined(__cplusplus) +# define LT_PARAMS(protos) protos +# define lt_ptr void* +#else +# define LT_PARAMS(protos) () +# define lt_ptr char* +#endif + +/* LT_STMT_START/END are used to create macros which expand to a + a single compound statement in a portable way. */ +#if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus) +# define LT_STMT_START (void)( +# define LT_STMT_END ) +#else +# if (defined (sun) || defined (__sun__)) +# define LT_STMT_START if (1) +# define LT_STMT_END else (void)0 +# else +# define LT_STMT_START do +# define LT_STMT_END while (0) +# endif +#endif + +/* LT_CONC creates a new concatenated symbol for the compiler + in a portable way. */ +#if defined(__STDC__) || defined(__cplusplus) +# define LT_CONC(s,t) s##t +#else +# define LT_CONC(s,t) s/**/t +#endif + +/* LT_STRLEN can be used safely on NULL pointers. */ +#define LT_STRLEN(s) (((s) && (s)[0]) ? strlen (s) : 0) + + + +/* --- WINDOWS SUPPORT --- */ + + +/* Canonicalise Windows and Cygwin recognition macros. */ +#ifdef __CYGWIN32__ +# ifndef __CYGWIN__ +# define __CYGWIN__ __CYGWIN32__ +# endif +#endif +#if defined(_WIN32) || defined(WIN32) +# ifndef __WINDOWS__ +# ifdef _WIN32 +# define __WINDOWS__ _WIN32 +# else +# ifdef WIN32 +# define __WINDOWS__ WIN32 +# endif +# endif +# endif +#endif + +#ifdef __WINDOWS__ +# ifndef __CYGWIN__ +/* LT_DIRSEP_CHAR is accepted *in addition* to '/' as a directory + separator when it is set. */ +# define LT_DIRSEP_CHAR '\\' +# define LT_PATHSEP_CHAR ';' +# endif +#endif +#ifndef LT_PATHSEP_CHAR +# define LT_PATHSEP_CHAR ':' +#endif + +/* DLL building support on win32 hosts; mostly to workaround their + ridiculous implementation of data symbol exporting. */ +#ifndef LT_SCOPE +# ifdef __WINDOWS__ +# ifdef DLL_EXPORT /* defined by libtool (if required) */ +# define LT_SCOPE __declspec(dllexport) +# endif +# ifdef LIBLTDL_DLL_IMPORT /* define if linking with this dll */ +# define LT_SCOPE extern __declspec(dllimport) +# endif +# endif +# ifndef LT_SCOPE /* static linking or !__WINDOWS__ */ +# define LT_SCOPE extern +# endif +#endif + + + + +/* --- DYNAMIC MODULE LOADING API --- */ + + +typedef struct lt_dlhandle_struct *lt_dlhandle; /* A loaded module. */ + +/* Initialisation and finalisation functions for libltdl. */ +SCMLTXT int lt_dlinit LT_PARAMS((void)); +SCMLTXT int lt_dlexit LT_PARAMS((void)) SCM_UNUSED; + +/* Module search path manipulation. */ +SCMLTXT int lt_dladdsearchdir LT_PARAMS((const char *search_dir)) SCM_UNUSED; +SCMLTXT int lt_dlinsertsearchdir LT_PARAMS((const char *before, + const char *search_dir)) SCM_UNUSED; +SCMLTXT int lt_dlsetsearchpath LT_PARAMS((const char *search_path)) SCM_UNUSED; +SCMLTXT const char *lt_dlgetsearchpath LT_PARAMS((void)) SCM_UNUSED; +SCMLTXT int lt_dlforeachfile LT_PARAMS(( + const char *search_path, + int (*func) (const char *filename, lt_ptr data), + lt_ptr data)) SCM_UNUSED; + +/* Portable libltdl versions of the system dlopen() API. */ +SCMLTXT lt_dlhandle lt_dlopen LT_PARAMS((const char *filename)); +SCMLTXT lt_dlhandle lt_dlopenext LT_PARAMS((const char *filename)); +SCMLTXT lt_ptr lt_dlsym LT_PARAMS((lt_dlhandle handle, + const char *name)); +SCMLTXT const char *lt_dlerror LT_PARAMS((void)); +SCMLTXT int lt_dlclose LT_PARAMS((lt_dlhandle handle)); + +/* Module residency management. */ +SCMLTXT int lt_dlmakeresident LT_PARAMS((lt_dlhandle handle)) SCM_UNUSED; +SCMLTXT int lt_dlisresident LT_PARAMS((lt_dlhandle handle)) SCM_UNUSED; + + + + +/* --- MUTEX LOCKING --- */ + + +typedef void lt_dlmutex_lock LT_PARAMS((void)); +typedef void lt_dlmutex_unlock LT_PARAMS((void)); +typedef void lt_dlmutex_seterror LT_PARAMS((const char *errmsg)); +typedef const char *lt_dlmutex_geterror LT_PARAMS((void)); + +SCMLTXT int lt_dlmutex_register LT_PARAMS((lt_dlmutex_lock *lock, + lt_dlmutex_unlock *unlock, + lt_dlmutex_seterror *seterror, + lt_dlmutex_geterror *geterror)) SCM_UNUSED; + + + + +/* --- MEMORY HANDLING --- */ + + +/* By default, the realloc function pointer is set to our internal + realloc implementation which iself uses lt_dlmalloc and lt_dlfree. + libltdl relies on a featureful realloc, but if you are sure yours + has the right semantics then you can assign it directly. Generally, + it is safe to assign just a malloc() and a free() function. */ +LT_SCOPE lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)); +LT_SCOPE lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size)) SCM_UNUSED; +LT_SCOPE void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)); + + + + +/* --- PRELOADED MODULE SUPPORT --- */ + + +/* A preopened symbol. Arrays of this type comprise the exported + symbols for a dlpreopened module. */ +typedef struct SCM_INSERTED_DLSYMLIST_STRUCT_DECL { + const char *name; + lt_ptr address; +} lt_dlsymlist; + +SCMLTXT int lt_dlpreload LT_PARAMS((const lt_dlsymlist *preloaded)); +SCMLTXT int lt_dlpreload_default + LT_PARAMS((const lt_dlsymlist *preloaded)); + +#define LTDL_SET_PRELOADED_SYMBOLS() LT_STMT_START{ \ + extern const lt_dlsymlist lt_preloaded_symbols[]; \ + lt_dlpreload_default(lt_preloaded_symbols); \ + }LT_STMT_END + + + + +/* --- MODULE INFORMATION --- */ + + +/* Read only information pertaining to a loaded module. */ +typedef struct { + char *filename; /* file name */ + char *name; /* module name */ + int ref_count; /* number of times lt_dlopened minus + number of times lt_dlclosed. */ +} lt_dlinfo; + +SCMLTXT const lt_dlinfo *lt_dlgetinfo LT_PARAMS((lt_dlhandle handle)) SCM_UNUSED; +SCMLTXT lt_dlhandle lt_dlhandle_next LT_PARAMS((lt_dlhandle place)) SCM_UNUSED; +SCMLTXT int lt_dlforeach LT_PARAMS(( + int (*func) (lt_dlhandle handle, lt_ptr data), + lt_ptr data)) SCM_UNUSED; + +/* Associating user data with loaded modules. */ +typedef unsigned lt_dlcaller_id; + +SCMLTXT lt_dlcaller_id lt_dlcaller_register LT_PARAMS((void)) SCM_UNUSED; +SCMLTXT lt_ptr lt_dlcaller_set_data LT_PARAMS((lt_dlcaller_id key, + lt_dlhandle handle, + lt_ptr data)) SCM_UNUSED; +SCMLTXT lt_ptr lt_dlcaller_get_data LT_PARAMS((lt_dlcaller_id key, + lt_dlhandle handle)) SCM_UNUSED; + + + +/* --- USER MODULE LOADER API --- */ + + +typedef struct lt_dlloader lt_dlloader; +typedef lt_ptr lt_user_data; +typedef lt_ptr lt_module; + +/* Function pointer types for creating user defined module loaders. */ +typedef lt_module lt_module_open LT_PARAMS((lt_user_data loader_data, + const char *filename)); +typedef int lt_module_close LT_PARAMS((lt_user_data loader_data, + lt_module handle)); +typedef lt_ptr lt_find_sym LT_PARAMS((lt_user_data loader_data, + lt_module handle, + const char *symbol)); +typedef int lt_dlloader_exit LT_PARAMS((lt_user_data loader_data)); + +struct lt_user_dlloader { + const char *sym_prefix; + lt_module_open *module_open; + lt_module_close *module_close; + lt_find_sym *find_sym; + lt_dlloader_exit *dlloader_exit; + lt_user_data dlloader_data; +}; + +SCMLTXT lt_dlloader *lt_dlloader_next LT_PARAMS((lt_dlloader *place)); +SCMLTXT lt_dlloader *lt_dlloader_find LT_PARAMS(( + const char *loader_name)); +SCMLTXT const char *lt_dlloader_name LT_PARAMS((lt_dlloader *place)) SCM_UNUSED; +SCMLTXT lt_user_data *lt_dlloader_data LT_PARAMS((lt_dlloader *place)) SCM_UNUSED; +SCMLTXT int lt_dlloader_add LT_PARAMS((lt_dlloader *place, + const struct lt_user_dlloader *dlloader, + const char *loader_name)); +SCMLTXT int lt_dlloader_remove LT_PARAMS(( + const char *loader_name)) SCM_UNUSED; + + + +/* --- ERROR MESSAGE HANDLING --- */ + + +/* Defining error strings alongside their symbolic names in a macro in + this way allows us to expand the macro in different contexts with + confidence that the enumeration of symbolic names will map correctly + onto the table of error strings. */ +#define lt_dlerror_table \ + LT_ERROR(UNKNOWN, "unknown error") \ + LT_ERROR(DLOPEN_NOT_SUPPORTED, "dlopen support not available") \ + LT_ERROR(INVALID_LOADER, "invalid loader") \ + LT_ERROR(INIT_LOADER, "loader initialization failed") \ + LT_ERROR(REMOVE_LOADER, "loader removal failed") \ + LT_ERROR(FILE_NOT_FOUND, "file not found") \ + LT_ERROR(DEPLIB_NOT_FOUND, "dependency library not found") \ + LT_ERROR(NO_SYMBOLS, "no symbols defined") \ + LT_ERROR(CANNOT_OPEN, "can't open the module") \ + LT_ERROR(CANNOT_CLOSE, "can't close the module") \ + LT_ERROR(SYMBOL_NOT_FOUND, "symbol not found") \ + LT_ERROR(NO_MEMORY, "not enough memory") \ + LT_ERROR(INVALID_HANDLE, "invalid module handle") \ + LT_ERROR(BUFFER_OVERFLOW, "internal buffer overflow") \ + LT_ERROR(INVALID_ERRORCODE, "invalid errorcode") \ + LT_ERROR(SHUTDOWN, "library already shutdown") \ + LT_ERROR(CLOSE_RESIDENT_MODULE, "can't close resident module") \ + LT_ERROR(INVALID_MUTEX_ARGS, "invalid mutex handler registration") \ + LT_ERROR(INVALID_POSITION, "invalid search path insert position") + +/* Enumerate the symbolic error names. */ +enum { +#define LT_ERROR(name, diagnostic) LT_CONC(LT_ERROR_, name), + lt_dlerror_table +#undef LT_ERROR + + LT_ERROR_MAX +}; + +/* These functions are only useful from inside custom module loaders. */ +SCMLTXT int lt_dladderror LT_PARAMS((const char *diagnostic)) SCM_UNUSED; +SCMLTXT int lt_dlseterror LT_PARAMS((int errorcode)) SCM_UNUSED; + + + +LT_END_C_DECLS + +#endif /* !LTDL_H */ diff --git a/libguile-ltdl/upstream/.cvsignore b/libguile-ltdl/upstream/.cvsignore new file mode 100644 index 000000000..e69de29bb diff --git a/libguile-ltdl/upstream/Makefile.am b/libguile-ltdl/upstream/Makefile.am new file mode 100644 index 000000000..9f8782e81 --- /dev/null +++ b/libguile-ltdl/upstream/Makefile.am @@ -0,0 +1,63 @@ +## Process this file with Automake to create Makefile.in +## +## Copyright (C) 2002 Free Software Foundation, Inc. +## +## This file is part of GUILE. +## +## GUILE is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as +## published by the Free Software Foundation; either version 2, or +## (at your option) any later version. +## +## GUILE is distributed in the hope that it will be useful, but +## WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public +## License along with GUILE; see the file COPYING. If not, write +## to the Free Software Foundation, Inc., 59 Temple Place, Suite +## 330, Boston, MA 02111-1307 USA + +AUTOMAKE_OPTIONS = gnu + +## Prevent automake from adding extra -I options +DEFS = @DEFS@ +## Check for headers in $(srcdir)/.., so that #include +## will find MUMBLE.h in this dir when we're +## building. +INCLUDES = -I.. -I$(srcdir)/.. + +ETAGS_ARGS = --regex='/SCM_\(GLOBAL_\)?\(G?PROC\|G?PROC1\|SYMBOL\|VCELL\|CONST_LONG\).*\"\([^\"]\)*\"/\3/' \ + --regex='/[ \t]*SCM_[G]?DEFINE1?[ \t]*(\([^,]*\),[^,]*/\1/' + +EXTRA_DIST := ltdl.h ltdl.c ltdl.h.diff ltdl.c.diff +BUILT_SOURCES := ltdl.h.diff ltdl.c.diff + +ltdl.h.diff: ltdl.h $(srcdir)/../raw-ltdl.h + cp $(srcdir)/../raw-ltdl.h raw-ltdl.guilemod.h.tmp + perl -pi \ + -e 's/SCMLTXT/extern/go;' \ + -e 's/SCMLTSTATIC //go;' \ + -e 's/ SCM_UNUSED//go;' \ + -e 's/SCM_INSERTED_DLSYMLIST_STRUCT_DECL //go;' \ + raw-ltdl.guilemod.h.tmp + mv raw-ltdl.guilemod.h.tmp raw-ltdl.guilemod.h + diff -ru ltdl.h raw-ltdl.guilemod.h > ltdl.h.diff; \ + test "$$?" -eq 1 + +ltdl.c.diff: ltdl.c $(srcdir)/../raw-ltdl.c + cp $(srcdir)/../raw-ltdl.c raw-ltdl.guilemod.c.tmp + perl -pi \ + -e 's/SCMLTXT/extern/go;' \ + -e 's/SCMLTSTATIC //go;' \ + -e 's/ SCM_UNUSED//go;' \ + -e 's/SCM_INSERTED_DLSYMLIST_STRUCT_DECL //go;' \ + raw-ltdl.guilemod.c.tmp + mv raw-ltdl.guilemod.c.tmp raw-ltdl.guilemod.c + diff -ru ltdl.c raw-ltdl.guilemod.c > ltdl.c.diff; \ + test "$$?" -eq 1 + +CLEANFILES := \ + raw-ltdl.guilemod.h raw-ltdl.guilemod.c \ + raw-ltdl.guilemod.h.tmp raw-ltdl.guilemod.c.tmp diff --git a/libguile-ltdl/upstream/ltdl.c b/libguile-ltdl/upstream/ltdl.c new file mode 100644 index 000000000..820bd3071 --- /dev/null +++ b/libguile-ltdl/upstream/ltdl.c @@ -0,0 +1,3999 @@ +/* ltdl.c -- system independent dlopen wrapper + Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. + Originally by Thomas Tanner + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA + +*/ + +#if HAVE_CONFIG_H +# include +#endif + +#if HAVE_UNISTD_H +# include +#endif + +#if HAVE_STDIO_H +# include +#endif + +#if HAVE_STDLIB_H +# include +#endif + +#if HAVE_STRING_H +# include +#else +# if HAVE_STRINGS_H +# include +# endif +#endif + +#if HAVE_CTYPE_H +# include +#endif + +#if HAVE_MALLOC_H +# include +#endif + +#if HAVE_MEMORY_H +# include +#endif + +#if HAVE_ERRNO_H +# include +#endif + +#if HAVE_DIRENT_H +# include +# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name)) +#else +# define dirent direct +# define LT_D_NAMLEN(dirent) ((dirent)->d_namlen) +# if HAVE_SYS_NDIR_H +# include +# endif +# if HAVE_SYS_DIR_H +# include +# endif +# if HAVE_NDIR_H +# include +# endif +#endif + +#if HAVE_ARGZ_H +# include +#endif + +#if HAVE_ASSERT_H +# include +#else +# define assert(arg) ((void) 0) +#endif + +#include "ltdl.h" + +#if WITH_DMALLOC +# include +#endif + + + + +/* --- WINDOWS SUPPORT --- */ + + +#ifdef DLL_EXPORT +# define LT_GLOBAL_DATA __declspec(dllexport) +#else +# define LT_GLOBAL_DATA +#endif + +/* fopen() mode flags for reading a text file */ +#undef LT_READTEXT_MODE +#ifdef __WINDOWS__ +# define LT_READTEXT_MODE "rt" +#else +# define LT_READTEXT_MODE "r" +#endif + + + + +/* --- MANIFEST CONSTANTS --- */ + + +/* Standard libltdl search path environment variable name */ +#undef LTDL_SEARCHPATH_VAR +#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH" + +/* Standard libtool archive file extension. */ +#undef LTDL_ARCHIVE_EXT +#define LTDL_ARCHIVE_EXT ".la" + +/* max. filename length */ +#ifndef LT_FILENAME_MAX +# define LT_FILENAME_MAX 1024 +#endif + +/* This is the maximum symbol size that won't require malloc/free */ +#undef LT_SYMBOL_LENGTH +#define LT_SYMBOL_LENGTH 128 + +/* This accounts for the _LTX_ separator */ +#undef LT_SYMBOL_OVERHEAD +#define LT_SYMBOL_OVERHEAD 5 + + + + +/* --- MEMORY HANDLING --- */ + + +/* These are the functions used internally. In addition to making + use of the associated function pointers above, they also perform + error handling. */ +static char *lt_estrdup LT_PARAMS((const char *str)); +static lt_ptr lt_emalloc LT_PARAMS((size_t size)); +static lt_ptr lt_erealloc LT_PARAMS((lt_ptr addr, size_t size)); + +static lt_ptr rpl_realloc LT_PARAMS((lt_ptr ptr, size_t size)); + +/* These are the pointers that can be changed by the caller: */ +LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)) + = (lt_ptr (*) LT_PARAMS((size_t))) malloc; +LT_GLOBAL_DATA lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size)) + = (lt_ptr (*) LT_PARAMS((lt_ptr, size_t))) rpl_realloc; +LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)) + = (void (*) LT_PARAMS((lt_ptr))) free; + +/* The following macros reduce the amount of typing needed to cast + assigned memory. */ +#if WITH_DMALLOC + +#define LT_DLMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) +#define LT_DLREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) +#define LT_DLFREE(p) \ + LT_STMT_START { if (p) (p) = (xfree (p), (lt_ptr) 0); } LT_STMT_END + +#define LT_EMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) +#define LT_EREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) + +#else + +#define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp))) +#define LT_DLREALLOC(tp, p, n) ((tp *) rpl_realloc ((p), (n) * sizeof(tp))) +#define LT_DLFREE(p) \ + LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END + +#define LT_EMALLOC(tp, n) ((tp *) lt_emalloc ((n) * sizeof(tp))) +#define LT_EREALLOC(tp, p, n) ((tp *) lt_erealloc ((p), (n) * sizeof(tp))) + +#endif + +#define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \ + if ((p) != (q)) { if (p) lt_dlfree (p); (p) = (q); (q) = 0; } \ + } LT_STMT_END + + +/* --- REPLACEMENT FUNCTIONS --- */ + + +#undef strdup +#define strdup rpl_strdup + +static char *strdup LT_PARAMS((const char *str)); + +static char * +strdup(str) + const char *str; +{ + char *tmp = NULL; + + if (str) + { + tmp = LT_DLMALLOC (char, 1+ strlen (str)); + if (tmp) + { + strcpy(tmp, str); + } + } + + return tmp; +} + + +#if ! HAVE_STRCMP + +#undef strcmp +#define strcmp rpl_strcmp + +static int strcmp LT_PARAMS((const char *str1, const char *str2)); + +static int +strcmp (str1, str2) + const char *str1; + const char *str2; +{ + if (str1 == str2) + return 0; + if (str1 == NULL) + return -1; + if (str2 == NULL) + return 1; + + for (;*str1 && *str2; ++str1, ++str2) + { + if (*str1 != *str2) + break; + } + + return (int)(*str1 - *str2); +} +#endif + + +#if ! HAVE_STRCHR + +# if HAVE_INDEX +# define strchr index +# else +# define strchr rpl_strchr + +static const char *strchr LT_PARAMS((const char *str, int ch)); + +static const char* +strchr(str, ch) + const char *str; + int ch; +{ + const char *p; + + for (p = str; *p != (char)ch && *p != LT_EOS_CHAR; ++p) + /*NOWORK*/; + + return (*p == (char)ch) ? p : 0; +} + +# endif +#endif /* !HAVE_STRCHR */ + + +#if ! HAVE_STRRCHR + +# if HAVE_RINDEX +# define strrchr rindex +# else +# define strrchr rpl_strrchr + +static const char *strrchr LT_PARAMS((const char *str, int ch)); + +static const char* +strrchr(str, ch) + const char *str; + int ch; +{ + const char *p, *q = NULL; + + for (p = str; *p != LT_EOS_CHAR; ++p) + { + if (*p == (char) ch) + { + q = p; + } + } + + return q; +} + +# endif +#endif + +/* NOTE: Neither bcopy nor the memcpy implementation below can + reliably handle copying in overlapping areas of memory. Use + memmove (for which there is a fallback implmentation below) + if you need that behaviour. */ +#if ! HAVE_MEMCPY + +# if HAVE_BCOPY +# define memcpy(dest, src, size) bcopy (src, dest, size) +# else +# define memcpy rpl_memcpy + +static lt_ptr memcpy LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); + +static lt_ptr +memcpy (dest, src, size) + lt_ptr dest; + const lt_ptr src; + size_t size; +{ + size_t i = 0; + + for (i = 0; i < size; ++i) + { + dest[i] = src[i]; + } + + return dest; +} + +# endif /* !HAVE_BCOPY */ +#endif /* !HAVE_MEMCPY */ + +#if ! HAVE_MEMMOVE +# define memmove rpl_memmove + +static lt_ptr memmove LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); + +static lt_ptr +memmove (dest, src, size) + lt_ptr dest; + const lt_ptr src; + size_t size; +{ + size_t i; + + if (dest < src) + for (i = 0; i < size; ++i) + { + dest[i] = src[i]; + } + else if (dest > src) + for (i = size -1; i >= 0; --i) + { + dest[i] = src[i]; + } + + return dest; +} + +#endif /* !HAVE_MEMMOVE */ + + +/* According to Alexandre Oliva , + ``realloc is not entirely portable'' + In any case we want to use the allocator supplied by the user without + burdening them with an lt_dlrealloc function pointer to maintain. + Instead implement our own version (with known boundary conditions) + using lt_dlmalloc and lt_dlfree. */ + +#undef realloc +#define realloc rpl_realloc + +static lt_ptr +realloc (ptr, size) + lt_ptr ptr; + size_t size; +{ + if (size == 0) + { + /* For zero or less bytes, free the original memory */ + if (ptr != NULL) + { + lt_dlfree (ptr); + } + + return (lt_ptr) 0; + } + else if (ptr == NULL) + { + /* Allow reallocation of a NULL pointer. */ + return lt_dlmalloc (size); + } + else + { + /* Allocate a new block, copy and free the old block. */ + lt_ptr mem = lt_dlmalloc (size); + + if (mem) + { + memcpy (mem, ptr, size); + lt_dlfree (ptr); + } + + /* Note that the contents of PTR are not damaged if there is + insufficient memory to realloc. */ + return mem; + } +} + + +#if ! HAVE_ARGZ_APPEND +# define argz_append rpl_argz_append + +static error_t argz_append LT_PARAMS((char **pargz, size_t *pargz_len, + const char *buf, size_t buf_len)); + +static error_t +argz_append (pargz, pargz_len, buf, buf_len) + char **pargz; + size_t *pargz_len; + const char *buf; + size_t buf_len; +{ + size_t argz_len; + char *argz; + + assert (pargz); + assert (pargz_len); + assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len)); + + /* If nothing needs to be appended, no more work is required. */ + if (buf_len == 0) + return 0; + + /* Ensure there is enough room to append BUF_LEN. */ + argz_len = *pargz_len + buf_len; + argz = LT_DLREALLOC (char, *pargz, argz_len); + if (!argz) + return ENOMEM; + + /* Copy characters from BUF after terminating '\0' in ARGZ. */ + memcpy (argz + *pargz_len, buf, buf_len); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + + return 0; +} +#endif /* !HAVE_ARGZ_APPEND */ + + +#if ! HAVE_ARGZ_CREATE_SEP +# define argz_create_sep rpl_argz_create_sep + +static error_t argz_create_sep LT_PARAMS((const char *str, int delim, + char **pargz, size_t *pargz_len)); + +static error_t +argz_create_sep (str, delim, pargz, pargz_len) + const char *str; + int delim; + char **pargz; + size_t *pargz_len; +{ + size_t argz_len; + char *argz = NULL; + + assert (str); + assert (pargz); + assert (pargz_len); + + /* Make a copy of STR, but replacing each occurence of + DELIM with '\0'. */ + argz_len = 1+ LT_STRLEN (str); + if (argz_len) + { + const char *p; + char *q; + + argz = LT_DLMALLOC (char, argz_len); + if (!argz) + return ENOMEM; + + for (p = str, q = argz; *p != LT_EOS_CHAR; ++p) + { + if (*p == delim) + { + /* Ignore leading delimiters, and fold consecutive + delimiters in STR into a single '\0' in ARGZ. */ + if ((q > argz) && (q[-1] != LT_EOS_CHAR)) + *q++ = LT_EOS_CHAR; + else + --argz_len; + } + else + *q++ = *p; + } + /* Copy terminating LT_EOS_CHAR. */ + *q = *p; + } + + /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */ + if (!argz_len) + LT_DLFREE (argz); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + + return 0; +} +#endif /* !HAVE_ARGZ_CREATE_SEP */ + + +#if ! HAVE_ARGZ_INSERT +# define argz_insert rpl_argz_insert + +static error_t argz_insert LT_PARAMS((char **pargz, size_t *pargz_len, + char *before, const char *entry)); + +static error_t +argz_insert (pargz, pargz_len, before, entry) + char **pargz; + size_t *pargz_len; + char *before; + const char *entry; +{ + assert (pargz); + assert (pargz_len); + assert (entry && *entry); + + /* No BEFORE address indicates ENTRY should be inserted after the + current last element. */ + if (!before) + return argz_append (pargz, pargz_len, entry, 1+ LT_STRLEN (entry)); + + /* This probably indicates a programmer error, but to preserve + semantics, scan back to the start of an entry if BEFORE points + into the middle of it. */ + while ((before >= *pargz) && (before[-1] != LT_EOS_CHAR)) + --before; + + { + size_t entry_len = 1+ LT_STRLEN (entry); + size_t argz_len = *pargz_len + entry_len; + size_t offset = before - *pargz; + char *argz = LT_DLREALLOC (char, *pargz, argz_len); + + if (!argz) + return ENOMEM; + + /* Make BEFORE point to the equivalent offset in ARGZ that it + used to have in *PARGZ incase realloc() moved the block. */ + before = argz + offset; + + /* Move the ARGZ entries starting at BEFORE up into the new + space at the end -- making room to copy ENTRY into the + resulting gap. */ + memmove (before + entry_len, before, *pargz_len - offset); + memcpy (before, entry, entry_len); + + /* Assign new values. */ + *pargz = argz; + *pargz_len = argz_len; + } + + return 0; +} +#endif /* !HAVE_ARGZ_INSERT */ + + +#if ! HAVE_ARGZ_NEXT +# define argz_next rpl_argz_next + +static char *argz_next LT_PARAMS((char *argz, size_t argz_len, + const char *entry)); + +static char * +argz_next (argz, argz_len, entry) + char *argz; + size_t argz_len; + const char *entry; +{ + assert ((argz && argz_len) || (!argz && !argz_len)); + + if (entry) + { + /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address + within the ARGZ vector. */ + assert ((!argz && !argz_len) + || ((argz <= entry) && (entry < (argz + argz_len)))); + + /* Move to the char immediately after the terminating + '\0' of ENTRY. */ + entry = 1+ strchr (entry, LT_EOS_CHAR); + + /* Return either the new ENTRY, or else NULL if ARGZ is + exhausted. */ + return (entry >= argz + argz_len) ? 0 : (char *) entry; + } + else + { + /* This should probably be flagged as a programmer error, + since starting an argz_next loop with the iterator set + to ARGZ is safer. To preserve semantics, handle the NULL + case by returning the start of ARGZ (if any). */ + if (argz_len > 0) + return argz; + else + return 0; + } +} +#endif /* !HAVE_ARGZ_NEXT */ + + + +#if ! HAVE_ARGZ_STRINGIFY +# define argz_stringify rpl_argz_stringify + +static void argz_stringify LT_PARAMS((char *argz, size_t argz_len, + int sep)); + +static void +argz_stringify (argz, argz_len, sep) + char *argz; + size_t argz_len; + int sep; +{ + assert ((argz && argz_len) || (!argz && !argz_len)); + + if (sep) + { + --argz_len; /* don't stringify the terminating EOS */ + while (--argz_len > 0) + { + if (argz[argz_len] == LT_EOS_CHAR) + argz[argz_len] = sep; + } + } +} +#endif /* !HAVE_ARGZ_STRINGIFY */ + + + + +/* --- TYPE DEFINITIONS -- */ + + +/* This type is used for the array of caller data sets in each handler. */ +typedef struct { + lt_dlcaller_id key; + lt_ptr data; +} lt_caller_data; + + + + +/* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */ + + +/* Extract the diagnostic strings from the error table macro in the same + order as the enumerated indices in ltdl.h. */ + +static const char *lt_dlerror_strings[] = + { +#define LT_ERROR(name, diagnostic) (diagnostic), + lt_dlerror_table +#undef LT_ERROR + + 0 + }; + +/* This structure is used for the list of registered loaders. */ +struct lt_dlloader { + struct lt_dlloader *next; + const char *loader_name; /* identifying name for each loader */ + const char *sym_prefix; /* prefix for symbols */ + lt_module_open *module_open; + lt_module_close *module_close; + lt_find_sym *find_sym; + lt_dlloader_exit *dlloader_exit; + lt_user_data dlloader_data; +}; + +struct lt_dlhandle_struct { + struct lt_dlhandle_struct *next; + lt_dlloader *loader; /* dlopening interface */ + lt_dlinfo info; + int depcount; /* number of dependencies */ + lt_dlhandle *deplibs; /* dependencies */ + lt_module module; /* system module handle */ + lt_ptr system; /* system specific data */ + lt_caller_data *caller_data; /* per caller associated data */ + int flags; /* various boolean stats */ +}; + +/* Various boolean flags can be stored in the flags field of an + lt_dlhandle_struct... */ +#define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag)) +#define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag)) + +#define LT_DLRESIDENT_FLAG (0x01 << 0) +/* ...add more flags here... */ + +#define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG) + + +#define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)] + +static const char objdir[] = LTDL_OBJDIR; +static const char archive_ext[] = LTDL_ARCHIVE_EXT; +#ifdef LTDL_SHLIB_EXT +static const char shlib_ext[] = LTDL_SHLIB_EXT; +#endif +#ifdef LTDL_SYSSEARCHPATH +static const char sys_search_path[] = LTDL_SYSSEARCHPATH; +#endif + + + + +/* --- MUTEX LOCKING --- */ + + +/* Macros to make it easier to run the lock functions only if they have + been registered. The reason for the complicated lock macro is to + ensure that the stored error message from the last error is not + accidentally erased if the current function doesn't generate an + error of its own. */ +#define LT_DLMUTEX_LOCK() LT_STMT_START { \ + if (lt_dlmutex_lock_func) (*lt_dlmutex_lock_func)(); \ + } LT_STMT_END +#define LT_DLMUTEX_UNLOCK() LT_STMT_START { \ + if (lt_dlmutex_unlock_func) (*lt_dlmutex_unlock_func)();\ + } LT_STMT_END +#define LT_DLMUTEX_SETERROR(errormsg) LT_STMT_START { \ + if (lt_dlmutex_seterror_func) \ + (*lt_dlmutex_seterror_func) (errormsg); \ + else lt_dllast_error = (errormsg); } LT_STMT_END +#define LT_DLMUTEX_GETERROR(errormsg) LT_STMT_START { \ + if (lt_dlmutex_seterror_func) \ + (errormsg) = (*lt_dlmutex_geterror_func) (); \ + else (errormsg) = lt_dllast_error; } LT_STMT_END + +/* The mutex functions stored here are global, and are necessarily the + same for all threads that wish to share access to libltdl. */ +static lt_dlmutex_lock *lt_dlmutex_lock_func = NULL; +static lt_dlmutex_unlock *lt_dlmutex_unlock_func = NULL; +static lt_dlmutex_seterror *lt_dlmutex_seterror_func = NULL; +static lt_dlmutex_geterror *lt_dlmutex_geterror_func = NULL; +static const char *lt_dllast_error = NULL; + + +/* Either set or reset the mutex functions. Either all the arguments must + be valid functions, or else all can be NULL to turn off locking entirely. + The registered functions should be manipulating a static global lock + from the lock() and unlock() callbacks, which needs to be reentrant. */ +int +lt_dlmutex_register (lock, unlock, seterror, geterror) + lt_dlmutex_lock *lock; + lt_dlmutex_unlock *unlock; + lt_dlmutex_seterror *seterror; + lt_dlmutex_geterror *geterror; +{ + lt_dlmutex_unlock *old_unlock = unlock; + int errors = 0; + + /* Lock using the old lock() callback, if any. */ + LT_DLMUTEX_LOCK (); + + if ((lock && unlock && seterror && geterror) + || !(lock || unlock || seterror || geterror)) + { + lt_dlmutex_lock_func = lock; + lt_dlmutex_unlock_func = unlock; + lt_dlmutex_geterror_func = geterror; + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS)); + ++errors; + } + + /* Use the old unlock() callback we saved earlier, if any. Otherwise + record any errors using internal storage. */ + if (old_unlock) + (*old_unlock) (); + + /* Return the number of errors encountered during the execution of + this function. */ + return errors; +} + + + + +/* --- ERROR HANDLING --- */ + + +static const char **user_error_strings = NULL; +static int errorcount = LT_ERROR_MAX; + +int +lt_dladderror (diagnostic) + const char *diagnostic; +{ + int errindex = 0; + int result = -1; + const char **temp = NULL; + + assert (diagnostic); + + LT_DLMUTEX_LOCK (); + + errindex = errorcount - LT_ERROR_MAX; + temp = LT_EREALLOC (const char *, user_error_strings, 1 + errindex); + if (temp) + { + user_error_strings = temp; + user_error_strings[errindex] = diagnostic; + result = errorcount++; + } + + LT_DLMUTEX_UNLOCK (); + + return result; +} + +int +lt_dlseterror (errindex) + int errindex; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + if (errindex >= errorcount || errindex < 0) + { + /* Ack! Error setting the error message! */ + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE)); + ++errors; + } + else if (errindex < LT_ERROR_MAX) + { + /* No error setting the error message! */ + LT_DLMUTEX_SETERROR (lt_dlerror_strings[errindex]); + } + else + { + /* No error setting the error message! */ + LT_DLMUTEX_SETERROR (user_error_strings[errindex - LT_ERROR_MAX]); + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static lt_ptr +lt_emalloc (size) + size_t size; +{ + lt_ptr mem = lt_dlmalloc (size); + if (size && !mem) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return mem; +} + +static lt_ptr +lt_erealloc (addr, size) + lt_ptr addr; + size_t size; +{ + lt_ptr mem = realloc (addr, size); + if (size && !mem) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return mem; +} + +static char * +lt_estrdup (str) + const char *str; +{ + char *copy = strdup (str); + if (LT_STRLEN (str) && !copy) + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + return copy; +} + + + + +/* --- DLOPEN() INTERFACE LOADER --- */ + + +/* The Cygwin dlopen implementation prints a spurious error message to + stderr if its call to LoadLibrary() fails for any reason. We can + mitigate this by not using the Cygwin implementation, and falling + back to our own LoadLibrary() wrapper. */ +#if HAVE_LIBDL && !defined(__CYGWIN__) + +/* dynamic linking with dlopen/dlsym */ + +#if HAVE_DLFCN_H +# include +#endif + +#if HAVE_SYS_DL_H +# include +#endif + +#ifdef RTLD_GLOBAL +# define LT_GLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LT_GLOBAL DL_GLOBAL +# endif +#endif /* !RTLD_GLOBAL */ +#ifndef LT_GLOBAL +# define LT_GLOBAL 0 +#endif /* !LT_GLOBAL */ + +/* We may have to define LT_LAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_LAZY +# define LT_LAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LT_LAZY_OR_NOW DL_LAZY +# endif +# endif /* !RTLD_LAZY */ +#endif +#ifndef LT_LAZY_OR_NOW +# ifdef RTLD_NOW +# define LT_LAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LT_LAZY_OR_NOW DL_NOW +# endif +# endif /* !RTLD_NOW */ +#endif +#ifndef LT_LAZY_OR_NOW +# define LT_LAZY_OR_NOW 0 +#endif /* !LT_LAZY_OR_NOW */ + +#if HAVE_DLERROR +# define DLERROR(arg) dlerror () +#else +# define DLERROR(arg) LT_DLSTRERROR (arg) +#endif + +static lt_module +sys_dl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW); + + if (!module) + { + LT_DLMUTEX_SETERROR (DLERROR (CANNOT_OPEN)); + } + + return module; +} + +static int +sys_dl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dlclose (module) != 0) + { + LT_DLMUTEX_SETERROR (DLERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_dl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dlsym (module, symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dl = + { +# ifdef NEED_USCORE + "_", +# else + 0, +# endif + sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 }; + + +#endif /* HAVE_LIBDL */ + + + +/* --- SHL_LOAD() INTERFACE LOADER --- */ + +#if HAVE_SHL_LOAD + +/* dynamic linking with shl_load (HP-UX) (comments from gmodule) */ + +#ifdef HAVE_DL_H +# include +#endif + +/* some flags are missing on some systems, so we provide + * harmless defaults. + * + * Mandatory: + * BIND_IMMEDIATE - Resolve symbol references when the library is loaded. + * BIND_DEFERRED - Delay code symbol resolution until actual reference. + * + * Optionally: + * BIND_FIRST - Place the library at the head of the symbol search + * order. + * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all + * unsatisfied symbols as fatal. This flag allows + * binding of unsatisfied code symbols to be deferred + * until use. + * [Perl: For certain libraries, like DCE, deferred + * binding often causes run time problems. Adding + * BIND_NONFATAL to BIND_IMMEDIATE still allows + * unresolved references in situations like this.] + * BIND_NOSTART - Do not call the initializer for the shared library + * when the library is loaded, nor on a future call to + * shl_unload(). + * BIND_VERBOSE - Print verbose messages concerning possible + * unsatisfied symbols. + * + * hp9000s700/hp9000s800: + * BIND_RESTRICTED - Restrict symbols visible by the library to those + * present at library load time. + * DYNAMIC_PATH - Allow the loader to dynamically search for the + * library specified by the path argument. + */ + +#ifndef DYNAMIC_PATH +# define DYNAMIC_PATH 0 +#endif +#ifndef BIND_RESTRICTED +# define BIND_RESTRICTED 0 +#endif + +#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) + +static lt_module +sys_shl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + static shl_t self = (shl_t) 0; + lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L); + + /* Since searching for a symbol against a NULL module handle will also + look in everything else that was already loaded and exported with + the -E compiler flag, we always cache a handle saved before any + modules are loaded. */ + if (!self) + { + lt_ptr address; + shl_findsym (&self, "main", TYPE_UNDEFINED, &address); + } + + if (!filename) + { + module = self; + } + else + { + module = shl_load (filename, LT_BIND_FLAGS, 0L); + + if (!module) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + } + } + + return module; +} + +static int +sys_shl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (module && (shl_unload ((shl_t) (module)) != 0)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_shl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = NULL; + + /* sys_shl_open should never return a NULL module handle */ + if (module == (lt_module) 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + } + else if (!shl_findsym((shl_t*) &module, symbol, TYPE_UNDEFINED, &address)) + { + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + } + + return address; +} + +static struct lt_user_dlloader sys_shl = { + 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 +}; + +#endif /* HAVE_SHL_LOAD */ + + + + +/* --- LOADLIBRARY() INTERFACE LOADER --- */ + +#ifdef __WINDOWS__ + +/* dynamic linking for Win32 */ + +#include + +/* Forward declaration; required to implement handle search below. */ +static lt_dlhandle handles; + +static lt_module +sys_wll_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlhandle cur; + lt_module module = NULL; + const char *errormsg = NULL; + char *searchname = NULL; + char *ext; + char self_name_buf[MAX_PATH]; + + if (!filename) + { + /* Get the name of main module */ + *self_name_buf = '\0'; + GetModuleFileName (NULL, self_name_buf, sizeof (self_name_buf)); + filename = ext = self_name_buf; + } + else + { + ext = strrchr (filename, '.'); + } + + if (ext) + { + /* FILENAME already has an extension. */ + searchname = lt_estrdup (filename); + } + else + { + /* Append a `.' to stop Windows from adding an + implicit `.dll' extension. */ + searchname = LT_EMALLOC (char, 2+ LT_STRLEN (filename)); + if (searchname) + sprintf (searchname, "%s.", filename); + } + if (!searchname) + return 0; + +#if __CYGWIN__ + { + char wpath[MAX_PATH]; + cygwin_conv_to_full_win32_path(searchname, wpath); + module = LoadLibrary(wpath); + } +#else + module = LoadLibrary (searchname); +#endif + LT_DLFREE (searchname); + + /* libltdl expects this function to fail if it is unable + to physically load the library. Sadly, LoadLibrary + will search the loaded libraries for a match and return + one of them if the path search load fails. + + We check whether LoadLibrary is returning a handle to + an already loaded module, and simulate failure if we + find one. */ + LT_DLMUTEX_LOCK (); + cur = handles; + while (cur) + { + if (!cur->module) + { + cur = NULL; + break; + } + + if (cur->module == module) + { + break; + } + + cur = cur->next; + } + LT_DLMUTEX_UNLOCK (); + + if (cur || !module) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + module = NULL; + } + + return module; +} + +static int +sys_wll_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (FreeLibrary(module) == 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_wll_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = GetProcAddress (module, symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_wll = { + 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 +}; + +#endif /* __WINDOWS__ */ + + + + +/* --- LOAD_ADD_ON() INTERFACE LOADER --- */ + + +#ifdef __BEOS__ + +/* dynamic linking for BeOS */ + +#include + +static lt_module +sys_bedl_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + image_id image = 0; + + if (filename) + { + image = load_add_on (filename); + } + else + { + image_info info; + int32 cookie = 0; + if (get_next_image_info (0, &cookie, &info) == B_OK) + image = load_add_on (info.name); + } + + if (image <= 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + image = 0; + } + + return (lt_module) image; +} + +static int +sys_bedl_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (unload_add_on ((image_id) module) != B_OK) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + + return errors; +} + +static lt_ptr +sys_bedl_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = NULL; + image_id image = (image_id) module; + + if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + address = NULL; + } + + return address; +} + +static struct lt_user_dlloader sys_bedl = { + 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 +}; + +#endif /* __BEOS__ */ + + + + +/* --- DLD_LINK() INTERFACE LOADER --- */ + + +#if HAVE_DLD + +/* dynamic linking with dld */ + +#if HAVE_DLD_H +#include +#endif + +static lt_module +sys_dld_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_module module = strdup (filename); + + if (dld_link (filename) != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); + LT_DLFREE (module); + module = NULL; + } + + return module; +} + +static int +sys_dld_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + int errors = 0; + + if (dld_unlink_by_file ((char*)(module), 1) != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); + ++errors; + } + else + { + LT_DLFREE (module); + } + + return errors; +} + +static lt_ptr +sys_dld_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_ptr address = dld_get_func (symbol); + + if (!address) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + } + + return address; +} + +static struct lt_user_dlloader sys_dld = { + 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0 +}; + +#endif /* HAVE_DLD */ + + + + +/* --- DLPREOPEN() INTERFACE LOADER --- */ + + +/* emulate dynamic linking using preloaded_symbols */ + +typedef struct lt_dlsymlists_t +{ + struct lt_dlsymlists_t *next; + const lt_dlsymlist *syms; +} lt_dlsymlists_t; + +static const lt_dlsymlist *default_preloaded_symbols = NULL; +static lt_dlsymlists_t *preloaded_symbols = NULL; + +static int +presym_init (loader_data) + lt_user_data loader_data; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + preloaded_symbols = NULL; + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static int +presym_free_symlists () +{ + lt_dlsymlists_t *lists; + + LT_DLMUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + lt_dlsymlists_t *tmp = lists; + + lists = lists->next; + LT_DLFREE (tmp); + } + preloaded_symbols = NULL; + + LT_DLMUTEX_UNLOCK (); + + return 0; +} + +static int +presym_exit (loader_data) + lt_user_data loader_data; +{ + presym_free_symlists (); + return 0; +} + +static int +presym_add_symlist (preloaded) + const lt_dlsymlist *preloaded; +{ + lt_dlsymlists_t *tmp; + lt_dlsymlists_t *lists; + int errors = 0; + + LT_DLMUTEX_LOCK (); + + lists = preloaded_symbols; + while (lists) + { + if (lists->syms == preloaded) + { + goto done; + } + lists = lists->next; + } + + tmp = LT_EMALLOC (lt_dlsymlists_t, 1); + if (tmp) + { + memset (tmp, 0, sizeof(lt_dlsymlists_t)); + tmp->syms = preloaded; + tmp->next = preloaded_symbols; + preloaded_symbols = tmp; + } + else + { + ++errors; + } + + done: + LT_DLMUTEX_UNLOCK (); + return errors; +} + +static lt_module +presym_open (loader_data, filename) + lt_user_data loader_data; + const char *filename; +{ + lt_dlsymlists_t *lists; + lt_module module = (lt_module) 0; + + LT_DLMUTEX_LOCK (); + lists = preloaded_symbols; + + if (!lists) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS)); + goto done; + } + + /* Can't use NULL as the reflective symbol header, as NULL is + used to mark the end of the entire symbol list. Self-dlpreopened + symbols follow this magic number, chosen to be an unlikely + clash with a real module name. */ + if (!filename) + { + filename = "@PROGRAM@"; + } + + while (lists) + { + const lt_dlsymlist *syms = lists->syms; + + while (syms->name) + { + if (!syms->address && strcmp(syms->name, filename) == 0) + { + module = (lt_module) syms; + goto done; + } + ++syms; + } + + lists = lists->next; + } + + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + + done: + LT_DLMUTEX_UNLOCK (); + return module; +} + +static int +presym_close (loader_data, module) + lt_user_data loader_data; + lt_module module; +{ + /* Just to silence gcc -Wall */ + module = NULL; + return 0; +} + +static lt_ptr +presym_sym (loader_data, module, symbol) + lt_user_data loader_data; + lt_module module; + const char *symbol; +{ + lt_dlsymlist *syms = (lt_dlsymlist*) module; + + ++syms; + while (syms->address) + { + if (strcmp(syms->name, symbol) == 0) + { + return syms->address; + } + + ++syms; + } + + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + + return 0; +} + +static struct lt_user_dlloader presym = { + 0, presym_open, presym_close, presym_sym, presym_exit, 0 +}; + + + + + +/* --- DYNAMIC MODULE LOADING --- */ + + +/* The type of a function used at each iteration of foreach_dirinpath(). */ +typedef int foreach_callback_func LT_PARAMS((char *filename, lt_ptr data1, + lt_ptr data2)); + +static int foreach_dirinpath LT_PARAMS((const char *search_path, + const char *base_name, + foreach_callback_func *func, + lt_ptr data1, lt_ptr data2)); + +static int find_file_callback LT_PARAMS((char *filename, lt_ptr data, + lt_ptr ignored)); +static int find_handle_callback LT_PARAMS((char *filename, lt_ptr data, + lt_ptr ignored)); +static int foreachfile_callback LT_PARAMS((char *filename, lt_ptr data1, + lt_ptr data2)); + + +static int canonicalize_path LT_PARAMS((const char *path, + char **pcanonical)); +static int argzize_path LT_PARAMS((const char *path, + char **pargz, + size_t *pargz_len)); +static FILE *find_file LT_PARAMS((const char *search_path, + const char *base_name, + char **pdir)); +static lt_dlhandle *find_handle LT_PARAMS((const char *search_path, + const char *base_name, + lt_dlhandle *handle)); +static int find_module LT_PARAMS((lt_dlhandle *handle, + const char *dir, + const char *libdir, + const char *dlname, + const char *old_name, + int installed)); +static int free_vars LT_PARAMS((char *dlname, char *oldname, + char *libdir, char *deplibs)); +static int load_deplibs LT_PARAMS((lt_dlhandle handle, + char *deplibs)); +static int trim LT_PARAMS((char **dest, + const char *str)); +static int try_dlopen LT_PARAMS((lt_dlhandle *handle, + const char *filename)); +static int tryall_dlopen LT_PARAMS((lt_dlhandle *handle, + const char *filename)); +static int unload_deplibs LT_PARAMS((lt_dlhandle handle)); +static int lt_argz_insert LT_PARAMS((char **pargz, + size_t *pargz_len, + char *before, + const char *entry)); +static int lt_argz_insertinorder LT_PARAMS((char **pargz, + size_t *pargz_len, + const char *entry)); +static int lt_argz_insertdir LT_PARAMS((char **pargz, + size_t *pargz_len, + const char *dirnam, + struct dirent *dp)); +static int lt_dlpath_insertdir LT_PARAMS((char **ppath, + char *before, + const char *dir)); +static int list_files_by_dir LT_PARAMS((const char *dirnam, + char **pargz, + size_t *pargz_len)); +static int file_not_found LT_PARAMS((void)); + +static char *user_search_path= NULL; +static lt_dlloader *loaders = NULL; +static lt_dlhandle handles = NULL; +static int initialized = 0; + +/* Initialize libltdl. */ +int +lt_dlinit () +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + + /* Initialize only at first call. */ + if (++initialized == 1) + { + handles = NULL; + user_search_path = NULL; /* empty search path */ + +#if HAVE_LIBDL && !defined(__CYGWIN__) + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen"); +#endif +#if HAVE_SHL_LOAD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen"); +#endif +#ifdef __WINDOWS__ + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen"); +#endif +#ifdef __BEOS__ + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen"); +#endif +#if HAVE_DLD + errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld"); +#endif + errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload"); + + if (presym_init (presym.dlloader_data)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER)); + ++errors; + } + else if (errors != 0) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED)); + ++errors; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlpreload (preloaded) + const lt_dlsymlist *preloaded; +{ + int errors = 0; + + if (preloaded) + { + errors = presym_add_symlist (preloaded); + } + else + { + presym_free_symlists(); + + LT_DLMUTEX_LOCK (); + if (default_preloaded_symbols) + { + errors = lt_dlpreload (default_preloaded_symbols); + } + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlpreload_default (preloaded) + const lt_dlsymlist *preloaded; +{ + LT_DLMUTEX_LOCK (); + default_preloaded_symbols = preloaded; + LT_DLMUTEX_UNLOCK (); + return 0; +} + +int +lt_dlexit () +{ + /* shut down libltdl */ + lt_dlloader *loader; + int errors = 0; + + LT_DLMUTEX_LOCK (); + loader = loaders; + + if (!initialized) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN)); + ++errors; + goto done; + } + + /* shut down only at last call. */ + if (--initialized == 0) + { + int level; + + while (handles && LT_DLIS_RESIDENT (handles)) + { + handles = handles->next; + } + + /* close all modules */ + for (level = 1; handles; ++level) + { + lt_dlhandle cur = handles; + int saw_nonresident = 0; + + while (cur) + { + lt_dlhandle tmp = cur; + cur = cur->next; + if (!LT_DLIS_RESIDENT (tmp)) + saw_nonresident = 1; + if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level) + { + if (lt_dlclose (tmp)) + { + ++errors; + } + } + } + /* done if only resident modules are left */ + if (!saw_nonresident) + break; + } + + /* close all loaders */ + while (loader) + { + lt_dlloader *next = loader->next; + lt_user_data data = loader->dlloader_data; + if (loader->dlloader_exit && loader->dlloader_exit (data)) + { + ++errors; + } + + LT_DLMEM_REASSIGN (loader, next); + } + loaders = NULL; + } + + done: + LT_DLMUTEX_UNLOCK (); + return errors; +} + +static int +tryall_dlopen (handle, filename) + lt_dlhandle *handle; + const char *filename; +{ + lt_dlhandle cur; + lt_dlloader *loader; + const char *saved_error; + int errors = 0; + + LT_DLMUTEX_GETERROR (saved_error); + LT_DLMUTEX_LOCK (); + + cur = handles; + loader = loaders; + + /* check whether the module was already opened */ + while (cur) + { + /* try to dlopen the program itself? */ + if (!cur->info.filename && !filename) + { + break; + } + + if (cur->info.filename && filename + && strcmp (cur->info.filename, filename) == 0) + { + break; + } + + cur = cur->next; + } + + if (cur) + { + ++cur->info.ref_count; + *handle = cur; + goto done; + } + + cur = *handle; + if (filename) + { + cur->info.filename = lt_estrdup (filename); + if (!cur->info.filename) + { + ++errors; + goto done; + } + } + else + { + cur->info.filename = NULL; + } + + while (loader) + { + lt_user_data data = loader->dlloader_data; + + cur->module = loader->module_open (data, filename); + + if (cur->module != NULL) + { + break; + } + loader = loader->next; + } + + if (!loader) + { + LT_DLFREE (cur->info.filename); + ++errors; + goto done; + } + + cur->loader = loader; + LT_DLMUTEX_SETERROR (saved_error); + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +static int +tryall_dlopen_module (handle, prefix, dirname, dlname) + lt_dlhandle *handle; + const char *prefix; + const char *dirname; + const char *dlname; +{ + int error = 0; + char *filename = NULL; + size_t filename_len = 0; + size_t dirname_len = LT_STRLEN (dirname); + + assert (handle); + assert (dirname); + assert (dlname); +#ifdef LT_DIRSEP_CHAR + /* Only canonicalized names (i.e. with DIRSEP chars already converted) + should make it into this function: */ + assert (strchr (dirname, LT_DIRSEP_CHAR) == NULL); +#endif + + if (dirname[dirname_len -1] == '/') + --dirname_len; + filename_len = dirname_len + 1 + LT_STRLEN (dlname); + + /* Allocate memory, and combine DIRNAME and MODULENAME into it. + The PREFIX (if any) is handled below. */ + filename = LT_EMALLOC (char, dirname_len + 1 + filename_len + 1); + if (!filename) + return 1; + + sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname); + + /* Now that we have combined DIRNAME and MODULENAME, if there is + also a PREFIX to contend with, simply recurse with the arguments + shuffled. Otherwise, attempt to open FILENAME as a module. */ + if (prefix) + { + error += tryall_dlopen_module (handle, + (const char *) 0, prefix, filename); + } + else if (tryall_dlopen (handle, filename) != 0) + { + ++error; + } + + LT_DLFREE (filename); + return error; +} + +static int +find_module (handle, dir, libdir, dlname, old_name, installed) + lt_dlhandle *handle; + const char *dir; + const char *libdir; + const char *dlname; + const char *old_name; + int installed; +{ + /* Try to open the old library first; if it was dlpreopened, + we want the preopened version of it, even if a dlopenable + module is available. */ + if (old_name && tryall_dlopen (handle, old_name) == 0) + { + return 0; + } + + /* Try to open the dynamic library. */ + if (dlname) + { + /* try to open the installed module */ + if (installed && libdir) + { + if (tryall_dlopen_module (handle, + (const char *) 0, libdir, dlname) == 0) + return 0; + } + + /* try to open the not-installed module */ + if (!installed) + { + if (tryall_dlopen_module (handle, dir, objdir, dlname) == 0) + return 0; + } + + /* maybe it was moved to another directory */ + { + if (tryall_dlopen_module (handle, + (const char *) 0, dir, dlname) == 0) + return 0; + } + } + + return 1; +} + + +static int +canonicalize_path (path, pcanonical) + const char *path; + char **pcanonical; +{ + char *canonical = NULL; + + assert (path && *path); + assert (pcanonical); + + canonical = LT_EMALLOC (char, 1+ LT_STRLEN (path)); + if (!canonical) + return 1; + + { + size_t dest = 0; + size_t src; + for (src = 0; path[src] != LT_EOS_CHAR; ++src) + { + /* Path separators are not copied to the beginning or end of + the destination, or if another separator would follow + immediately. */ + if (path[src] == LT_PATHSEP_CHAR) + { + if ((dest == 0) + || (path[1+ src] == LT_PATHSEP_CHAR) + || (path[1+ src] == LT_EOS_CHAR)) + continue; + } + + /* Anything other than a directory separator is copied verbatim. */ + if ((path[src] != '/') +#ifdef LT_DIRSEP_CHAR + && (path[src] != LT_DIRSEP_CHAR) +#endif + ) + { + canonical[dest++] = path[src]; + } + /* Directory separators are converted and copied only if they are + not at the end of a path -- i.e. before a path separator or + NULL terminator. */ + else if ((path[1+ src] != LT_PATHSEP_CHAR) + && (path[1+ src] != LT_EOS_CHAR) +#ifdef LT_DIRSEP_CHAR + && (path[1+ src] != LT_DIRSEP_CHAR) +#endif + && (path[1+ src] != '/')) + { + canonical[dest++] = '/'; + } + } + + /* Add an end-of-string marker at the end. */ + canonical[dest] = LT_EOS_CHAR; + } + + /* Assign new value. */ + *pcanonical = canonical; + + return 0; +} + +static int +argzize_path (path, pargz, pargz_len) + const char *path; + char **pargz; + size_t *pargz_len; +{ + error_t error; + + assert (path); + assert (pargz); + assert (pargz_len); + + if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len))) + { + switch (error) + { + case ENOMEM: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + break; + default: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); + break; + } + + return 1; + } + + return 0; +} + +/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element + of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns + non-zero or all elements are exhausted. If BASE_NAME is non-NULL, + it is appended to each SEARCH_PATH element before FUNC is called. */ +static int +foreach_dirinpath (search_path, base_name, func, data1, data2) + const char *search_path; + const char *base_name; + foreach_callback_func *func; + lt_ptr data1; + lt_ptr data2; +{ + int result = 0; + int filenamesize = 0; + size_t lenbase = LT_STRLEN (base_name); + size_t argz_len = 0; + char *argz = NULL; + char *filename = NULL; + char *canonical = NULL; + + LT_DLMUTEX_LOCK (); + + if (!search_path || !*search_path) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + goto cleanup; + } + + if (canonicalize_path (search_path, &canonical) != 0) + goto cleanup; + + if (argzize_path (canonical, &argz, &argz_len) != 0) + goto cleanup; + + { + char *dir_name = NULL; + while ((dir_name = argz_next (argz, argz_len, dir_name))) + { + size_t lendir = LT_STRLEN (dir_name); + + if (lendir +1 +lenbase >= filenamesize) + { + LT_DLFREE (filename); + filenamesize = lendir +1 +lenbase +1; /* "/d" + '/' + "f" + '\0' */ + filename = LT_EMALLOC (char, filenamesize); + if (!filename) + goto cleanup; + } + + assert (filenamesize > lendir); + strcpy (filename, dir_name); + + if (base_name && *base_name) + { + if (filename[lendir -1] != '/') + filename[lendir++] = '/'; + strcpy (filename +lendir, base_name); + } + + if ((result = (*func) (filename, data1, data2))) + { + break; + } + } + } + + cleanup: + LT_DLFREE (argz); + LT_DLFREE (canonical); + LT_DLFREE (filename); + + LT_DLMUTEX_UNLOCK (); + + return result; +} + +/* If FILEPATH can be opened, store the name of the directory component + in DATA1, and the opened FILE* structure address in DATA2. Otherwise + DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */ +static int +find_file_callback (filename, data1, data2) + char *filename; + lt_ptr data1; + lt_ptr data2; +{ + char **pdir = (char **) data1; + FILE **pfile = (FILE **) data2; + int is_done = 0; + + assert (filename && *filename); + assert (pdir); + assert (pfile); + + if ((*pfile = fopen (filename, LT_READTEXT_MODE))) + { + char *dirend = strrchr (filename, '/'); + + if (dirend > filename) + *dirend = LT_EOS_CHAR; + + LT_DLFREE (*pdir); + *pdir = lt_estrdup (filename); + is_done = (*pdir == NULL) ? -1 : 1; + } + + return is_done; +} + +static FILE * +find_file (search_path, base_name, pdir) + const char *search_path; + const char *base_name; + char **pdir; +{ + FILE *file = NULL; + + foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file); + + return file; +} + +static int +find_handle_callback (filename, data, ignored) + char *filename; + lt_ptr data; + lt_ptr ignored; +{ + lt_dlhandle *handle = (lt_dlhandle *) data; + int notfound = access (filename, R_OK); + + /* Bail out if file cannot be read... */ + if (notfound) + return 0; + + /* Try to dlopen the file, but do not continue searching in any + case. */ + if (tryall_dlopen (handle, filename) != 0) + *handle = NULL; + + return 1; +} + +/* If HANDLE was found return it, otherwise return 0. If HANDLE was + found but could not be opened, *HANDLE will be set to 0. */ +static lt_dlhandle * +find_handle (search_path, base_name, handle) + const char *search_path; + const char *base_name; + lt_dlhandle *handle; +{ + if (!search_path) + return 0; + + if (!foreach_dirinpath (search_path, base_name, find_handle_callback, + handle, 0)) + return 0; + + return handle; +} + +static int +load_deplibs (handle, deplibs) + lt_dlhandle handle; + char *deplibs; +{ +#if LTDL_DLOPEN_DEPLIBS + char *p, *save_search_path = NULL; + int depcount = 0; + int i; + char **names = NULL; +#endif + int errors = 0; + + handle->depcount = 0; + +#if LTDL_DLOPEN_DEPLIBS + if (!deplibs) + { + return errors; + } + ++errors; + + LT_DLMUTEX_LOCK (); + if (user_search_path) + { + save_search_path = lt_estrdup (user_search_path); + if (!save_search_path) + goto cleanup; + } + + /* extract search paths and count deplibs */ + p = deplibs; + while (*p) + { + if (!isspace ((int) *p)) + { + char *end = p+1; + while (*end && !isspace((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0) + { + char save = *end; + *end = '\0'; /* set a temporary string terminator */ + if (lt_dladdsearchdir(p+2)) + { + goto cleanup; + } + *end = save; + } + else + { + ++depcount; + } + + p = end; + } + else + { + ++p; + } + } + + /* restore the old search path */ + LT_DLFREE (user_search_path); + user_search_path = save_search_path; + + LT_DLMUTEX_UNLOCK (); + + if (!depcount) + { + errors = 0; + goto cleanup; + } + + names = LT_EMALLOC (char *, depcount * sizeof (char*)); + if (!names) + goto cleanup; + + /* now only extract the actual deplibs */ + depcount = 0; + p = deplibs; + while (*p) + { + if (isspace ((int) *p)) + { + ++p; + } + else + { + char *end = p+1; + while (*end && !isspace ((int) *end)) + { + ++end; + } + + if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0) + { + char *name; + char save = *end; + *end = '\0'; /* set a temporary string terminator */ + if (strncmp(p, "-l", 2) == 0) + { + size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2); + name = LT_EMALLOC (char, 1+ name_len); + if (name) + sprintf (name, "lib%s", p+2); + } + else + name = lt_estrdup(p); + + if (!name) + goto cleanup_names; + + names[depcount++] = name; + *end = save; + } + p = end; + } + } + + /* load the deplibs (in reverse order) + At this stage, don't worry if the deplibs do not load correctly, + they may already be statically linked into the loading application + for instance. There will be a more enlightening error message + later on if the loaded module cannot resolve all of its symbols. */ + if (depcount) + { + int j = 0; + + handle->deplibs = (lt_dlhandle*) LT_EMALLOC (lt_dlhandle *, depcount); + if (!handle->deplibs) + goto cleanup; + + for (i = 0; i < depcount; ++i) + { + handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]); + if (handle->deplibs[j]) + { + ++j; + } + } + + handle->depcount = j; /* Number of successfully loaded deplibs */ + errors = 0; + } + + cleanup_names: + for (i = 0; i < depcount; ++i) + { + LT_DLFREE (names[i]); + } + + cleanup: + LT_DLFREE (names); +#endif + + return errors; +} + +static int +unload_deplibs (handle) + lt_dlhandle handle; +{ + int i; + int errors = 0; + + if (handle->depcount) + { + for (i = 0; i < handle->depcount; ++i) + { + if (!LT_DLIS_RESIDENT (handle->deplibs[i])) + { + errors += lt_dlclose (handle->deplibs[i]); + } + } + } + + return errors; +} + +static int +trim (dest, str) + char **dest; + const char *str; +{ + /* remove the leading and trailing "'" from str + and store the result in dest */ + const char *end = strrchr (str, '\''); + size_t len = LT_STRLEN (str); + char *tmp; + + LT_DLFREE (*dest); + + if (len > 3 && str[0] == '\'') + { + tmp = LT_EMALLOC (char, end - str); + if (!tmp) + return 1; + + strncpy(tmp, &str[1], (end - str) - 1); + tmp[len-3] = LT_EOS_CHAR; + *dest = tmp; + } + else + { + *dest = NULL; + } + + return 0; +} + +static int +free_vars (dlname, oldname, libdir, deplibs) + char *dlname; + char *oldname; + char *libdir; + char *deplibs; +{ + LT_DLFREE (dlname); + LT_DLFREE (oldname); + LT_DLFREE (libdir); + LT_DLFREE (deplibs); + + return 0; +} + +static int +try_dlopen (phandle, filename) + lt_dlhandle *phandle; + const char *filename; +{ + const char * ext = NULL; + const char * saved_error = NULL; + char * canonical = NULL; + char * base_name = NULL; + char * dir = NULL; + char * name = NULL; + int errors = 0; + lt_dlhandle newhandle; + + assert (phandle); + assert (*phandle == NULL); + + LT_DLMUTEX_GETERROR (saved_error); + + /* dlopen self? */ + if (!filename) + { + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + return 1; + + memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); + newhandle = *phandle; + + /* lt_dlclose()ing yourself is very bad! Disallow it. */ + LT_DLSET_FLAG (*phandle, LT_DLRESIDENT_FLAG); + + if (tryall_dlopen (&newhandle, 0) != 0) + { + LT_DLFREE (*phandle); + return 1; + } + + goto register_handle; + } + + assert (filename && *filename); + + /* Doing this immediately allows internal functions to safely + assume only canonicalized paths are passed. */ + if (canonicalize_path (filename, &canonical) != 0) + { + ++errors; + goto cleanup; + } + + /* If the canonical module name is a path (relative or absolute) + then split it into a directory part and a name part. */ + base_name = strrchr (canonical, '/'); + if (base_name) + { + size_t dirlen = (1+ base_name) - canonical; + + dir = LT_EMALLOC (char, 1+ dirlen); + if (!dir) + { + ++errors; + goto cleanup; + } + + strncpy (dir, canonical, dirlen); + dir[dirlen] = LT_EOS_CHAR; + + ++base_name; + } + else + LT_DLMEM_REASSIGN (base_name, canonical); + + assert (base_name && *base_name); + + /* Check whether we are opening a libtool module (.la extension). */ + ext = strrchr (base_name, '.'); + if (ext && strcmp (ext, archive_ext) == 0) + { + /* this seems to be a libtool module */ + FILE * file = NULL; + char * dlname = NULL; + char * old_name = NULL; + char * libdir = NULL; + char * deplibs = NULL; + char * line = NULL; + size_t line_len; + + /* if we can't find the installed flag, it is probably an + installed libtool archive, produced with an old version + of libtool */ + int installed = 1; + + /* extract the module name from the file name */ + name = LT_EMALLOC (char, ext - base_name + 1); + if (!name) + { + ++errors; + goto cleanup; + } + + /* canonicalize the module name */ + { + size_t i; + for (i = 0; i < ext - base_name; ++i) + { + if (isalnum ((int)(base_name[i]))) + { + name[i] = base_name[i]; + } + else + { + name[i] = '_'; + } + } + name[ext - base_name] = LT_EOS_CHAR; + } + + /* Now try to open the .la file. If there is no directory name + component, try to find it first in user_search_path and then other + prescribed paths. Otherwise (or in any case if the module was not + yet found) try opening just the module name as passed. */ + if (!dir) + { + const char *search_path; + + LT_DLMUTEX_LOCK (); + search_path = user_search_path; + if (search_path) + file = find_file (user_search_path, base_name, &dir); + LT_DLMUTEX_UNLOCK (); + + if (!file) + { + search_path = getenv (LTDL_SEARCHPATH_VAR); + if (search_path) + file = find_file (search_path, base_name, &dir); + } + +#ifdef LTDL_SHLIBPATH_VAR + if (!file) + { + search_path = getenv (LTDL_SHLIBPATH_VAR); + if (search_path) + file = find_file (search_path, base_name, &dir); + } +#endif +#ifdef LTDL_SYSSEARCHPATH + if (!file && sys_search_path) + { + file = find_file (sys_search_path, base_name, &dir); + } +#endif + } + if (!file) + { + file = fopen (filename, LT_READTEXT_MODE); + } + + /* If we didn't find the file by now, it really isn't there. Set + the status flag, and bail out. */ + if (!file) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + ++errors; + goto cleanup; + } + + line_len = LT_FILENAME_MAX; + line = LT_EMALLOC (char, line_len); + if (!line) + { + fclose (file); + ++errors; + goto cleanup; + } + + /* read the .la file */ + while (!feof (file)) + { + if (!fgets (line, (int) line_len, file)) + { + break; + } + + /* Handle the case where we occasionally need to read a line + that is longer than the initial buffer size. */ + while (line[LT_STRLEN(line) -1] != '\n') + { + line = LT_DLREALLOC (char, line, line_len *2); + if (!fgets (&line[line_len -1], (int) line_len +1, file)) + { + break; + } + line_len *= 2; + } + + if (line[0] == '\n' || line[0] == '#') + { + continue; + } + +#undef STR_DLNAME +#define STR_DLNAME "dlname=" + if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0) + { + errors += trim (&dlname, &line[sizeof (STR_DLNAME) - 1]); + } + +#undef STR_OLD_LIBRARY +#define STR_OLD_LIBRARY "old_library=" + else if (strncmp (line, STR_OLD_LIBRARY, + sizeof (STR_OLD_LIBRARY) - 1) == 0) + { + errors += trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]); + } +#undef STR_LIBDIR +#define STR_LIBDIR "libdir=" + else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0) + { + errors += trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]); + } + +#undef STR_DL_DEPLIBS +#define STR_DL_DEPLIBS "dependency_libs=" + else if (strncmp (line, STR_DL_DEPLIBS, + sizeof (STR_DL_DEPLIBS) - 1) == 0) + { + errors += trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]); + } + else if (strcmp (line, "installed=yes\n") == 0) + { + installed = 1; + } + else if (strcmp (line, "installed=no\n") == 0) + { + installed = 0; + } + +#undef STR_LIBRARY_NAMES +#define STR_LIBRARY_NAMES "library_names=" + else if (! dlname && strncmp (line, STR_LIBRARY_NAMES, + sizeof (STR_LIBRARY_NAMES) - 1) == 0) + { + char *last_libname; + errors += trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]); + if (!errors + && dlname + && (last_libname = strrchr (dlname, ' ')) != NULL) + { + last_libname = lt_estrdup (last_libname + 1); + if (!last_libname) + { + ++errors; + goto cleanup; + } + LT_DLMEM_REASSIGN (dlname, last_libname); + } + } + + if (errors) + break; + } + + fclose (file); + LT_DLFREE (line); + + /* allocate the handle */ + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + ++errors; + + if (errors) + { + free_vars (dlname, old_name, libdir, deplibs); + LT_DLFREE (*phandle); + goto cleanup; + } + + assert (*phandle); + + memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); + if (load_deplibs (*phandle, deplibs) == 0) + { + newhandle = *phandle; + /* find_module may replace newhandle */ + if (find_module (&newhandle, dir, libdir, dlname, old_name, installed)) + { + unload_deplibs (*phandle); + ++errors; + } + } + else + { + ++errors; + } + + free_vars (dlname, old_name, libdir, deplibs); + if (errors) + { + LT_DLFREE (*phandle); + goto cleanup; + } + + if (*phandle != newhandle) + { + unload_deplibs (*phandle); + } + } + else + { + /* not a libtool module */ + *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); + if (*phandle == NULL) + { + ++errors; + goto cleanup; + } + + memset (*phandle, 0, sizeof (struct lt_dlhandle_struct)); + newhandle = *phandle; + + /* If the module has no directory name component, try to find it + first in user_search_path and then other prescribed paths. + Otherwise (or in any case if the module was not yet found) try + opening just the module name as passed. */ + if ((dir || (!find_handle (user_search_path, base_name, &newhandle) + && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name, + &newhandle) +#ifdef LTDL_SHLIBPATH_VAR + && !find_handle (getenv (LTDL_SHLIBPATH_VAR), base_name, + &newhandle) +#endif +#ifdef LTDL_SYSSEARCHPATH + && !find_handle (sys_search_path, base_name, &newhandle) +#endif + ))) + { + if (tryall_dlopen (&newhandle, filename) != 0) + { + newhandle = NULL; + } + } + + if (!newhandle) + { + LT_DLFREE (*phandle); + ++errors; + goto cleanup; + } + } + + register_handle: + LT_DLMEM_REASSIGN (*phandle, newhandle); + + if ((*phandle)->info.ref_count == 0) + { + (*phandle)->info.ref_count = 1; + LT_DLMEM_REASSIGN ((*phandle)->info.name, name); + + LT_DLMUTEX_LOCK (); + (*phandle)->next = handles; + handles = *phandle; + LT_DLMUTEX_UNLOCK (); + } + + LT_DLMUTEX_SETERROR (saved_error); + + cleanup: + LT_DLFREE (dir); + LT_DLFREE (name); + LT_DLFREE (canonical); + + return errors; +} + +lt_dlhandle +lt_dlopen (filename) + const char *filename; +{ + lt_dlhandle handle = NULL; + + /* Just incase we missed a code path in try_dlopen() that reports + an error, but forgets to reset handle... */ + if (try_dlopen (&handle, filename) != 0) + return 0; + + return handle; +} + +/* If the last error messge store was `FILE_NOT_FOUND', then return + non-zero. */ +static int +file_not_found () +{ + const char *error = NULL; + + LT_DLMUTEX_GETERROR (error); + if (error == LT_DLSTRERROR (FILE_NOT_FOUND)) + return 1; + + return 0; +} + +/* If FILENAME has an ARCHIVE_EXT or SHLIB_EXT extension, try to + open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT, + and if a file is still not found try again with SHLIB_EXT appended + instead. */ +lt_dlhandle +lt_dlopenext (filename) + const char *filename; +{ + lt_dlhandle handle = NULL; + char * tmp = NULL; + char * ext = NULL; + size_t len; + int errors = 0; + + if (!filename) + { + return lt_dlopen (filename); + } + + assert (filename); + + len = LT_STRLEN (filename); + ext = strrchr (filename, '.'); + + /* If FILENAME already bears a suitable extension, there is no need + to try appending additional extensions. */ + if (ext && ((strcmp (ext, archive_ext) == 0) +#ifdef LTDL_SHLIB_EXT + || (strcmp (ext, shlib_ext) == 0) +#endif + )) + { + return lt_dlopen (filename); + } + + /* First try appending ARCHIVE_EXT. */ + tmp = LT_EMALLOC (char, len + LT_STRLEN (archive_ext) + 1); + if (!tmp) + return 0; + + strcpy (tmp, filename); + strcat (tmp, archive_ext); + errors = try_dlopen (&handle, tmp); + + /* If we found FILENAME, stop searching -- whether we were able to + load the file as a module or not. If the file exists but loading + failed, it is better to return an error message here than to + report FILE_NOT_FOUND when the alternatives (foo.so etc) are not + in the module search path. */ + if (handle || ((errors > 0) && file_not_found ())) + { + LT_DLFREE (tmp); + return handle; + } + +#ifdef LTDL_SHLIB_EXT + /* Try appending SHLIB_EXT. */ + if (LT_STRLEN (shlib_ext) > LT_STRLEN (archive_ext)) + { + LT_DLFREE (tmp); + tmp = LT_EMALLOC (char, len + LT_STRLEN (shlib_ext) + 1); + if (!tmp) + return 0; + + strcpy (tmp, filename); + } + else + { + tmp[len] = LT_EOS_CHAR; + } + + strcat(tmp, shlib_ext); + errors = try_dlopen (&handle, tmp); + + /* As before, if the file was found but loading failed, return now + with the current error message. */ + if (handle || ((errors > 0) && file_not_found ())) + { + LT_DLFREE (tmp); + return handle; + } +#endif + + /* Still here? Then we really did fail to locate any of the file + names we tried. */ + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); + LT_DLFREE (tmp); + return 0; +} + + +static int +lt_argz_insert (pargz, pargz_len, before, entry) + char **pargz; + size_t *pargz_len; + char *before; + const char *entry; +{ + error_t error; + + if ((error = argz_insert (pargz, pargz_len, before, entry))) + { + switch (error) + { + case ENOMEM: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); + break; + default: + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); + break; + } + return 1; + } + + return 0; +} + +static int +lt_argz_insertinorder (pargz, pargz_len, entry) + char **pargz; + size_t *pargz_len; + const char *entry; +{ + char *before = NULL; + + assert (pargz); + assert (pargz_len); + assert (entry && *entry); + + if (*pargz) + while ((before = argz_next (*pargz, *pargz_len, before))) + { + int cmp = strcmp (entry, before); + + if (cmp < 0) break; + if (cmp == 0) return 0; /* No duplicates! */ + } + + return lt_argz_insert (pargz, pargz_len, before, entry); +} + +static int +lt_argz_insertdir (pargz, pargz_len, dirnam, dp) + char **pargz; + size_t *pargz_len; + const char *dirnam; + struct dirent *dp; +{ + char *buf = NULL; + size_t buf_len = 0; + char *end = NULL; + size_t end_offset = 0; + size_t dir_len = 0; + int errors = 0; + + assert (pargz); + assert (pargz_len); + assert (dp); + + dir_len = LT_STRLEN (dirnam); + end = dp->d_name + LT_D_NAMLEN(dp); + + /* Ignore version numbers. */ + { + char *p; + for (p = end; p -1 > dp->d_name; --p) + if (strchr (".0123456789", p[-1]) == 0) + break; + + if (*p == '.') + end = p; + } + + /* Ignore filename extension. */ + { + char *p; + for (p = end -1; p > dp->d_name; --p) + if (*p == '.') + { + end = p; + break; + } + } + + /* Prepend the directory name. */ + end_offset = end - dp->d_name; + buf_len = dir_len + 1+ end_offset; + buf = LT_EMALLOC (char, 1+ buf_len); + if (!buf) + return ++errors; + + assert (buf); + + strcpy (buf, dirnam); + strcat (buf, "/"); + strncat (buf, dp->d_name, end_offset); + buf[buf_len] = LT_EOS_CHAR; + + /* Try to insert (in order) into ARGZ/ARGZ_LEN. */ + if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0) + ++errors; + + LT_DLFREE (buf); + + return errors; +} + +static int +list_files_by_dir (dirnam, pargz, pargz_len) + const char *dirnam; + char **pargz; + size_t *pargz_len; +{ + DIR *dirp = NULL; + int errors = 0; + + assert (dirnam && *dirnam); + assert (pargz); + assert (pargz_len); + assert (dirnam[LT_STRLEN(dirnam) -1] != '/'); + + dirp = opendir (dirnam); + if (dirp) + { + struct dirent *dp = NULL; + + while ((dp = readdir (dirp))) + if (dp->d_name[0] != '.') + if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp)) + { + ++errors; + break; + } + + closedir (dirp); + } + else + ++errors; + + return errors; +} + + +/* If there are any files in DIRNAME, call the function passed in + DATA1 (with the name of each file and DATA2 as arguments). */ +static int +foreachfile_callback (dirname, data1, data2) + char *dirname; + lt_ptr data1; + lt_ptr data2; +{ + int (*func) LT_PARAMS((const char *filename, lt_ptr data)) + = (int (*) LT_PARAMS((const char *filename, lt_ptr data))) data1; + + int is_done = 0; + char *argz = NULL; + size_t argz_len = 0; + + if (list_files_by_dir (dirname, &argz, &argz_len) != 0) + goto cleanup; + if (!argz) + goto cleanup; + + { + char *filename = NULL; + while ((filename = argz_next (argz, argz_len, filename))) + if ((is_done = (*func) (filename, data2))) + break; + } + + cleanup: + LT_DLFREE (argz); + + return is_done; +} + + +/* Call FUNC for each unique extensionless file in SEARCH_PATH, along + with DATA. The filenames passed to FUNC would be suitable for + passing to lt_dlopenext. The extensions are stripped so that + individual modules do not generate several entries (e.g. libfoo.la, + libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL, + then the same directories that lt_dlopen would search are examined. */ +int +lt_dlforeachfile (search_path, func, data) + const char *search_path; + int (*func) LT_PARAMS ((const char *filename, lt_ptr data)); + lt_ptr data; +{ + int is_done = 0; + + if (search_path) + { + /* If a specific path was passed, search only the directories + listed in it. */ + is_done = foreach_dirinpath (search_path, 0, + foreachfile_callback, func, data); + } + else + { + /* Otherwise search the default paths. */ + is_done = foreach_dirinpath (user_search_path, 0, + foreachfile_callback, func, data); + if (!is_done) + { + is_done = foreach_dirinpath (getenv("LTDL_LIBRARY_PATH"), 0, + foreachfile_callback, func, data); + } + +#ifdef LTDL_SHLIBPATH_VAR + if (!is_done) + { + is_done = foreach_dirinpath (getenv(LTDL_SHLIBPATH_VAR), 0, + foreachfile_callback, func, data); + } +#endif +#ifdef LTDL_SYSSEARCHPATH + if (!is_done) + { + is_done = foreach_dirinpath (getenv(LTDL_SYSSEARCHPATH), 0, + foreachfile_callback, func, data); + } +#endif + } + + return is_done; +} + +int +lt_dlclose (handle) + lt_dlhandle handle; +{ + lt_dlhandle cur, last; + int errors = 0; + + LT_DLMUTEX_LOCK (); + + /* check whether the handle is valid */ + last = cur = handles; + while (cur && handle != cur) + { + last = cur; + cur = cur->next; + } + + if (!cur) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + goto done; + } + + handle->info.ref_count--; + + /* Note that even with resident modules, we must track the ref_count + correctly incase the user decides to reset the residency flag + later (even though the API makes no provision for that at the + moment). */ + if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle)) + { + lt_user_data data = handle->loader->dlloader_data; + + if (handle != handles) + { + last->next = handle->next; + } + else + { + handles = handle->next; + } + + errors += handle->loader->module_close (data, handle->module); + errors += unload_deplibs(handle); + + /* It is up to the callers to free the data itself. */ + LT_DLFREE (handle->caller_data); + + LT_DLFREE (handle->info.filename); + LT_DLFREE (handle->info.name); + LT_DLFREE (handle); + + goto done; + } + + if (LT_DLIS_RESIDENT (handle)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE)); + ++errors; + } + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_ptr +lt_dlsym (handle, symbol) + lt_dlhandle handle; + const char *symbol; +{ + size_t lensym; + char lsym[LT_SYMBOL_LENGTH]; + char *sym; + lt_ptr address; + lt_user_data data; + + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + if (!symbol) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); + return 0; + } + + lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->loader->sym_prefix) + + LT_STRLEN (handle->info.name); + + if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH) + { + sym = lsym; + } + else + { + sym = LT_EMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1); + if (!sym) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW)); + return 0; + } + } + + data = handle->loader->dlloader_data; + if (handle->info.name) + { + const char *saved_error; + + LT_DLMUTEX_GETERROR (saved_error); + + /* this is a libtool module */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, handle->info.name); + } + else + { + strcpy(sym, handle->info.name); + } + + strcat(sym, "_LTX_"); + strcat(sym, symbol); + + /* try "modulename_LTX_symbol" */ + address = handle->loader->find_sym (data, handle->module, sym); + if (address) + { + if (sym != lsym) + { + LT_DLFREE (sym); + } + return address; + } + LT_DLMUTEX_SETERROR (saved_error); + } + + /* otherwise try "symbol" */ + if (handle->loader->sym_prefix) + { + strcpy(sym, handle->loader->sym_prefix); + strcat(sym, symbol); + } + else + { + strcpy(sym, symbol); + } + + address = handle->loader->find_sym (data, handle->module, sym); + if (sym != lsym) + { + LT_DLFREE (sym); + } + + return address; +} + +const char * +lt_dlerror () +{ + const char *error; + + LT_DLMUTEX_GETERROR (error); + LT_DLMUTEX_SETERROR (0); + + return error ? error : LT_DLSTRERROR (UNKNOWN); +} + +static int +lt_dlpath_insertdir (ppath, before, dir) + char **ppath; + char *before; + const char *dir; +{ + int errors = 0; + char *canonical = NULL; + char *argz = NULL; + size_t argz_len = 0; + + assert (ppath); + assert (dir && *dir); + + if (canonicalize_path (dir, &canonical) != 0) + { + ++errors; + goto cleanup; + } + + assert (canonical && *canonical); + + /* If *PPATH is empty, set it to DIR. */ + if (*ppath == NULL) + { + assert (!before); /* BEFORE cannot be set without PPATH. */ + assert (dir); /* Without DIR, don't call this function! */ + + *ppath = lt_estrdup (dir); + if (*ppath == NULL) + ++errors; + + return errors; + } + + assert (ppath && *ppath); + + if (argzize_path (*ppath, &argz, &argz_len) != 0) + { + ++errors; + goto cleanup; + } + + /* Convert BEFORE into an equivalent offset into ARGZ. This only works + if *PPATH is already canonicalized, and hence does not change length + with respect to ARGZ. We canonicalize each entry as it is added to + the search path, and don't call this function with (uncanonicalized) + user paths, so this is a fair assumption. */ + if (before) + { + assert (*ppath <= before); + assert (before - *ppath <= strlen (*ppath)); + + before = before - *ppath + argz; + } + + if (lt_argz_insert (&argz, &argz_len, before, dir) != 0) + { + ++errors; + goto cleanup; + } + + argz_stringify (argz, argz_len, LT_PATHSEP_CHAR); + LT_DLMEM_REASSIGN (*ppath, argz); + + cleanup: + LT_DLFREE (canonical); + LT_DLFREE (argz); + + return errors; +} + +int +lt_dladdsearchdir (search_dir) + const char *search_dir; +{ + int errors = 0; + + if (search_dir && *search_dir) + { + LT_DLMUTEX_LOCK (); + if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0) + ++errors; + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlinsertsearchdir (before, search_dir) + const char *before; + const char *search_dir; +{ + int errors = 0; + + if (before) + { + LT_DLMUTEX_LOCK (); + if ((before < user_search_path) + || (before >= user_search_path + LT_STRLEN (user_search_path))) + { + LT_DLMUTEX_UNLOCK (); + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_POSITION)); + return 1; + } + LT_DLMUTEX_UNLOCK (); + } + + if (search_dir && *search_dir) + { + LT_DLMUTEX_LOCK (); + if (lt_dlpath_insertdir (&user_search_path, + (char *) before, search_dir) != 0) + { + ++errors; + } + LT_DLMUTEX_UNLOCK (); + } + + return errors; +} + +int +lt_dlsetsearchpath (search_path) + const char *search_path; +{ + int errors = 0; + + LT_DLMUTEX_LOCK (); + LT_DLFREE (user_search_path); + LT_DLMUTEX_UNLOCK (); + + if (!search_path || !LT_STRLEN (search_path)) + { + return errors; + } + + LT_DLMUTEX_LOCK (); + if (canonicalize_path (search_path, &user_search_path) != 0) + ++errors; + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +const char * +lt_dlgetsearchpath () +{ + const char *saved_path; + + LT_DLMUTEX_LOCK (); + saved_path = user_search_path; + LT_DLMUTEX_UNLOCK (); + + return saved_path; +} + +int +lt_dlmakeresident (handle) + lt_dlhandle handle; +{ + int errors = 0; + + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + ++errors; + } + else + { + LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); + } + + return errors; +} + +int +lt_dlisresident (handle) + lt_dlhandle handle; +{ + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return -1; + } + + return LT_DLIS_RESIDENT (handle); +} + + + + +/* --- MODULE INFORMATION --- */ + +const lt_dlinfo * +lt_dlgetinfo (handle) + lt_dlhandle handle; +{ + if (!handle) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); + return 0; + } + + return &(handle->info); +} + +lt_dlhandle +lt_dlhandle_next (place) + lt_dlhandle place; +{ + return place ? place->next : handles; +} + +int +lt_dlforeach (func, data) + int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data)); + lt_ptr data; +{ + int errors = 0; + lt_dlhandle cur; + + LT_DLMUTEX_LOCK (); + + cur = handles; + while (cur) + { + lt_dlhandle tmp = cur; + + cur = cur->next; + if ((*func) (tmp, data)) + { + ++errors; + break; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_dlcaller_id +lt_dlcaller_register () +{ + static lt_dlcaller_id last_caller_id = 0; + int result; + + LT_DLMUTEX_LOCK (); + result = ++last_caller_id; + LT_DLMUTEX_UNLOCK (); + + return result; +} + +lt_ptr +lt_dlcaller_set_data (key, handle, data) + lt_dlcaller_id key; + lt_dlhandle handle; + lt_ptr data; +{ + int n_elements = 0; + lt_ptr stale = NULL; + int i; + + /* This needs to be locked so that the caller data can be updated + simultaneously by different threads. */ + LT_DLMUTEX_LOCK (); + + if (handle->caller_data) + while (handle->caller_data[n_elements].key) + ++n_elements; + + for (i = 0; i < n_elements; ++i) + { + if (handle->caller_data[i].key == key) + { + stale = handle->caller_data[i].data; + break; + } + } + + /* Ensure that there is enough room in this handle's caller_data + array to accept a new element (and an empty end marker). */ + if (i == n_elements) + { + lt_caller_data *temp + = LT_DLREALLOC (lt_caller_data, handle->caller_data, 2+ n_elements); + + if (!temp) + { + stale = NULL; + goto done; + } + + handle->caller_data = temp; + + /* We only need this if we needed to allocate a new caller_data. */ + handle->caller_data[i].key = key; + handle->caller_data[1+ i].key = 0; + } + + handle->caller_data[i].data = data; + + done: + LT_DLMUTEX_UNLOCK (); + + return stale; +} + +lt_ptr +lt_dlcaller_get_data (key, handle) + lt_dlcaller_id key; + lt_dlhandle handle; +{ + lt_ptr result = (lt_ptr) 0; + + /* This needs to be locked so that the caller data isn't updated by + another thread part way through this function. */ + LT_DLMUTEX_LOCK (); + + /* Locate the index of the element with a matching KEY. */ + { + int i; + for (i = 0; handle->caller_data[i].key; ++i) + { + if (handle->caller_data[i].key == key) + { + result = handle->caller_data[i].data; + break; + } + } + } + + LT_DLMUTEX_UNLOCK (); + + return result; +} + + + +/* --- USER MODULE LOADER API --- */ + + +int +lt_dlloader_add (place, dlloader, loader_name) + lt_dlloader *place; + const struct lt_user_dlloader *dlloader; + const char *loader_name; +{ + int errors = 0; + lt_dlloader *node = NULL, *ptr = NULL; + + if ((dlloader == NULL) /* diagnose null parameters */ + || (dlloader->module_open == NULL) + || (dlloader->module_close == NULL) + || (dlloader->find_sym == NULL)) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + /* Create a new dlloader node with copies of the user callbacks. */ + node = LT_EMALLOC (lt_dlloader, 1); + if (!node) + return 1; + + node->next = NULL; + node->loader_name = loader_name; + node->sym_prefix = dlloader->sym_prefix; + node->dlloader_exit = dlloader->dlloader_exit; + node->module_open = dlloader->module_open; + node->module_close = dlloader->module_close; + node->find_sym = dlloader->find_sym; + node->dlloader_data = dlloader->dlloader_data; + + LT_DLMUTEX_LOCK (); + if (!loaders) + { + /* If there are no loaders, NODE becomes the list! */ + loaders = node; + } + else if (!place) + { + /* If PLACE is not set, add NODE to the end of the + LOADERS list. */ + for (ptr = loaders; ptr->next; ptr = ptr->next) + { + /*NOWORK*/; + } + + ptr->next = node; + } + else if (loaders == place) + { + /* If PLACE is the first loader, NODE goes first. */ + node->next = place; + loaders = node; + } + else + { + /* Find the node immediately preceding PLACE. */ + for (ptr = loaders; ptr->next != place; ptr = ptr->next) + { + /*NOWORK*/; + } + + if (ptr->next != place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + ++errors; + } + else + { + /* Insert NODE between PTR and PLACE. */ + node->next = place; + ptr->next = node; + } + } + + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +int +lt_dlloader_remove (loader_name) + const char *loader_name; +{ + lt_dlloader *place = lt_dlloader_find (loader_name); + lt_dlhandle handle; + int errors = 0; + + if (!place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + return 1; + } + + LT_DLMUTEX_LOCK (); + + /* Fail if there are any open modules which use this loader. */ + for (handle = handles; handle; handle = handle->next) + { + if (handle->loader == place) + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER)); + ++errors; + goto done; + } + } + + if (place == loaders) + { + /* PLACE is the first loader in the list. */ + loaders = loaders->next; + } + else + { + /* Find the loader before the one being removed. */ + lt_dlloader *prev; + for (prev = loaders; prev->next; prev = prev->next) + { + if (!strcmp (prev->next->loader_name, loader_name)) + { + break; + } + } + + place = prev->next; + prev->next = prev->next->next; + } + + if (place->dlloader_exit) + { + errors = place->dlloader_exit (place->dlloader_data); + } + + LT_DLFREE (place); + + done: + LT_DLMUTEX_UNLOCK (); + + return errors; +} + +lt_dlloader * +lt_dlloader_next (place) + lt_dlloader *place; +{ + lt_dlloader *next; + + LT_DLMUTEX_LOCK (); + next = place ? place->next : loaders; + LT_DLMUTEX_UNLOCK (); + + return next; +} + +const char * +lt_dlloader_name (place) + lt_dlloader *place; +{ + const char *name = NULL; + + if (place) + { + LT_DLMUTEX_LOCK (); + name = place ? place->loader_name : 0; + LT_DLMUTEX_UNLOCK (); + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return name; +} + +lt_user_data * +lt_dlloader_data (place) + lt_dlloader *place; +{ + lt_user_data *data = NULL; + + if (place) + { + LT_DLMUTEX_LOCK (); + data = place ? &(place->dlloader_data) : 0; + LT_DLMUTEX_UNLOCK (); + } + else + { + LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); + } + + return data; +} + +lt_dlloader * +lt_dlloader_find (loader_name) + const char *loader_name; +{ + lt_dlloader *place = NULL; + + LT_DLMUTEX_LOCK (); + for (place = loaders; place; place = place->next) + { + if (strcmp (place->loader_name, loader_name) == 0) + { + break; + } + } + LT_DLMUTEX_UNLOCK (); + + return place; +} diff --git a/libguile-ltdl/upstream/ltdl.h b/libguile-ltdl/upstream/ltdl.h new file mode 100644 index 000000000..2bbfa302c --- /dev/null +++ b/libguile-ltdl/upstream/ltdl.h @@ -0,0 +1,361 @@ +/* ltdl.h -- generic dlopen functions + Copyright (C) 1998-2000 Free Software Foundation, Inc. + Originally by Thomas Tanner + This file is part of GNU Libtool. + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +As a special exception to the GNU Lesser General Public License, +if you distribute this file as part of a program or library that +is built using GNU libtool, you may include it under the same +distribution terms that you use for the rest of that program. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free +Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA +*/ + +/* Only include this header file once. */ +#ifndef LTDL_H +#define LTDL_H 1 + +#include /* for size_t declaration */ + + +/* --- MACROS FOR PORTABILITY --- */ + + +/* Saves on those hard to debug '\0' typos.... */ +#define LT_EOS_CHAR '\0' + +/* LTDL_BEGIN_C_DECLS should be used at the beginning of your declarations, + so that C++ compilers don't mangle their names. Use LTDL_END_C_DECLS at + the end of C declarations. */ +#ifdef __cplusplus +# define LT_BEGIN_C_DECLS extern "C" { +# define LT_END_C_DECLS } +#else +# define LT_BEGIN_C_DECLS /* empty */ +# define LT_END_C_DECLS /* empty */ +#endif + +LT_BEGIN_C_DECLS + + +/* LT_PARAMS is a macro used to wrap function prototypes, so that compilers + that don't understand ANSI C prototypes still work, and ANSI C + compilers can issue warnings about type mismatches. */ +#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(WIN32) || defined(__cplusplus) +# define LT_PARAMS(protos) protos +# define lt_ptr void* +#else +# define LT_PARAMS(protos) () +# define lt_ptr char* +#endif + +/* LT_STMT_START/END are used to create macros which expand to a + a single compound statement in a portable way. */ +#if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus) +# define LT_STMT_START (void)( +# define LT_STMT_END ) +#else +# if (defined (sun) || defined (__sun__)) +# define LT_STMT_START if (1) +# define LT_STMT_END else (void)0 +# else +# define LT_STMT_START do +# define LT_STMT_END while (0) +# endif +#endif + +/* LT_CONC creates a new concatenated symbol for the compiler + in a portable way. */ +#if defined(__STDC__) || defined(__cplusplus) +# define LT_CONC(s,t) s##t +#else +# define LT_CONC(s,t) s/**/t +#endif + +/* LT_STRLEN can be used safely on NULL pointers. */ +#define LT_STRLEN(s) (((s) && (s)[0]) ? strlen (s) : 0) + + + +/* --- WINDOWS SUPPORT --- */ + + +/* Canonicalise Windows and Cygwin recognition macros. */ +#ifdef __CYGWIN32__ +# ifndef __CYGWIN__ +# define __CYGWIN__ __CYGWIN32__ +# endif +#endif +#if defined(_WIN32) || defined(WIN32) +# ifndef __WINDOWS__ +# ifdef _WIN32 +# define __WINDOWS__ _WIN32 +# else +# ifdef WIN32 +# define __WINDOWS__ WIN32 +# endif +# endif +# endif +#endif + +#ifdef __WINDOWS__ +# ifndef __CYGWIN__ +/* LT_DIRSEP_CHAR is accepted *in addition* to '/' as a directory + separator when it is set. */ +# define LT_DIRSEP_CHAR '\\' +# define LT_PATHSEP_CHAR ';' +# endif +#endif +#ifndef LT_PATHSEP_CHAR +# define LT_PATHSEP_CHAR ':' +#endif + +/* DLL building support on win32 hosts; mostly to workaround their + ridiculous implementation of data symbol exporting. */ +#ifndef LT_SCOPE +# ifdef __WINDOWS__ +# ifdef DLL_EXPORT /* defined by libtool (if required) */ +# define LT_SCOPE __declspec(dllexport) +# endif +# ifdef LIBLTDL_DLL_IMPORT /* define if linking with this dll */ +# define LT_SCOPE extern __declspec(dllimport) +# endif +# endif +# ifndef LT_SCOPE /* static linking or !__WINDOWS__ */ +# define LT_SCOPE extern +# endif +#endif + + + + +/* --- DYNAMIC MODULE LOADING API --- */ + + +typedef struct lt_dlhandle_struct *lt_dlhandle; /* A loaded module. */ + +/* Initialisation and finalisation functions for libltdl. */ +extern int lt_dlinit LT_PARAMS((void)); +extern int lt_dlexit LT_PARAMS((void)); + +/* Module search path manipulation. */ +extern int lt_dladdsearchdir LT_PARAMS((const char *search_dir)); +extern int lt_dlinsertsearchdir LT_PARAMS((const char *before, + const char *search_dir)); +extern int lt_dlsetsearchpath LT_PARAMS((const char *search_path)); +extern const char *lt_dlgetsearchpath LT_PARAMS((void)); +extern int lt_dlforeachfile LT_PARAMS(( + const char *search_path, + int (*func) (const char *filename, lt_ptr data), + lt_ptr data)); + +/* Portable libltdl versions of the system dlopen() API. */ +extern lt_dlhandle lt_dlopen LT_PARAMS((const char *filename)); +extern lt_dlhandle lt_dlopenext LT_PARAMS((const char *filename)); +extern lt_ptr lt_dlsym LT_PARAMS((lt_dlhandle handle, + const char *name)); +extern const char *lt_dlerror LT_PARAMS((void)); +extern int lt_dlclose LT_PARAMS((lt_dlhandle handle)); + +/* Module residency management. */ +extern int lt_dlmakeresident LT_PARAMS((lt_dlhandle handle)); +extern int lt_dlisresident LT_PARAMS((lt_dlhandle handle)); + + + + +/* --- MUTEX LOCKING --- */ + + +typedef void lt_dlmutex_lock LT_PARAMS((void)); +typedef void lt_dlmutex_unlock LT_PARAMS((void)); +typedef void lt_dlmutex_seterror LT_PARAMS((const char *errmsg)); +typedef const char *lt_dlmutex_geterror LT_PARAMS((void)); + +extern int lt_dlmutex_register LT_PARAMS((lt_dlmutex_lock *lock, + lt_dlmutex_unlock *unlock, + lt_dlmutex_seterror *seterror, + lt_dlmutex_geterror *geterror)); + + + + +/* --- MEMORY HANDLING --- */ + + +/* By default, the realloc function pointer is set to our internal + realloc implementation which iself uses lt_dlmalloc and lt_dlfree. + libltdl relies on a featureful realloc, but if you are sure yours + has the right semantics then you can assign it directly. Generally, + it is safe to assign just a malloc() and a free() function. */ +LT_SCOPE lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)); +LT_SCOPE lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size)); +LT_SCOPE void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)); + + + + +/* --- PRELOADED MODULE SUPPORT --- */ + + +/* A preopened symbol. Arrays of this type comprise the exported + symbols for a dlpreopened module. */ +typedef struct { + const char *name; + lt_ptr address; +} lt_dlsymlist; + +extern int lt_dlpreload LT_PARAMS((const lt_dlsymlist *preloaded)); +extern int lt_dlpreload_default + LT_PARAMS((const lt_dlsymlist *preloaded)); + +#define LTDL_SET_PRELOADED_SYMBOLS() LT_STMT_START{ \ + extern const lt_dlsymlist lt_preloaded_symbols[]; \ + lt_dlpreload_default(lt_preloaded_symbols); \ + }LT_STMT_END + + + + +/* --- MODULE INFORMATION --- */ + + +/* Read only information pertaining to a loaded module. */ +typedef struct { + char *filename; /* file name */ + char *name; /* module name */ + int ref_count; /* number of times lt_dlopened minus + number of times lt_dlclosed. */ +} lt_dlinfo; + +extern const lt_dlinfo *lt_dlgetinfo LT_PARAMS((lt_dlhandle handle)); +extern lt_dlhandle lt_dlhandle_next LT_PARAMS((lt_dlhandle place)); +extern int lt_dlforeach LT_PARAMS(( + int (*func) (lt_dlhandle handle, lt_ptr data), + lt_ptr data)); + +/* Associating user data with loaded modules. */ +typedef unsigned lt_dlcaller_id; + +extern lt_dlcaller_id lt_dlcaller_register LT_PARAMS((void)); +extern lt_ptr lt_dlcaller_set_data LT_PARAMS((lt_dlcaller_id key, + lt_dlhandle handle, + lt_ptr data)); +extern lt_ptr lt_dlcaller_get_data LT_PARAMS((lt_dlcaller_id key, + lt_dlhandle handle)); + + + +/* --- USER MODULE LOADER API --- */ + + +typedef struct lt_dlloader lt_dlloader; +typedef lt_ptr lt_user_data; +typedef lt_ptr lt_module; + +/* Function pointer types for creating user defined module loaders. */ +typedef lt_module lt_module_open LT_PARAMS((lt_user_data loader_data, + const char *filename)); +typedef int lt_module_close LT_PARAMS((lt_user_data loader_data, + lt_module handle)); +typedef lt_ptr lt_find_sym LT_PARAMS((lt_user_data loader_data, + lt_module handle, + const char *symbol)); +typedef int lt_dlloader_exit LT_PARAMS((lt_user_data loader_data)); + +struct lt_user_dlloader { + const char *sym_prefix; + lt_module_open *module_open; + lt_module_close *module_close; + lt_find_sym *find_sym; + lt_dlloader_exit *dlloader_exit; + lt_user_data dlloader_data; +}; + +extern lt_dlloader *lt_dlloader_next LT_PARAMS((lt_dlloader *place)); +extern lt_dlloader *lt_dlloader_find LT_PARAMS(( + const char *loader_name)); +extern const char *lt_dlloader_name LT_PARAMS((lt_dlloader *place)); +extern lt_user_data *lt_dlloader_data LT_PARAMS((lt_dlloader *place)); +extern int lt_dlloader_add LT_PARAMS((lt_dlloader *place, + const struct lt_user_dlloader *dlloader, + const char *loader_name)); +extern int lt_dlloader_remove LT_PARAMS(( + const char *loader_name)); + + + +/* --- ERROR MESSAGE HANDLING --- */ + + +/* Defining error strings alongside their symbolic names in a macro in + this way allows us to expand the macro in different contexts with + confidence that the enumeration of symbolic names will map correctly + onto the table of error strings. */ +#define lt_dlerror_table \ + LT_ERROR(UNKNOWN, "unknown error") \ + LT_ERROR(DLOPEN_NOT_SUPPORTED, "dlopen support not available") \ + LT_ERROR(INVALID_LOADER, "invalid loader") \ + LT_ERROR(INIT_LOADER, "loader initialization failed") \ + LT_ERROR(REMOVE_LOADER, "loader removal failed") \ + LT_ERROR(FILE_NOT_FOUND, "file not found") \ + LT_ERROR(DEPLIB_NOT_FOUND, "dependency library not found") \ + LT_ERROR(NO_SYMBOLS, "no symbols defined") \ + LT_ERROR(CANNOT_OPEN, "can't open the module") \ + LT_ERROR(CANNOT_CLOSE, "can't close the module") \ + LT_ERROR(SYMBOL_NOT_FOUND, "symbol not found") \ + LT_ERROR(NO_MEMORY, "not enough memory") \ + LT_ERROR(INVALID_HANDLE, "invalid module handle") \ + LT_ERROR(BUFFER_OVERFLOW, "internal buffer overflow") \ + LT_ERROR(INVALID_ERRORCODE, "invalid errorcode") \ + LT_ERROR(SHUTDOWN, "library already shutdown") \ + LT_ERROR(CLOSE_RESIDENT_MODULE, "can't close resident module") \ + LT_ERROR(INVALID_MUTEX_ARGS, "invalid mutex handler registration") \ + LT_ERROR(INVALID_POSITION, "invalid search path insert position") + +/* Enumerate the symbolic error names. */ +enum { +#define LT_ERROR(name, diagnostic) LT_CONC(LT_ERROR_, name), + lt_dlerror_table +#undef LT_ERROR + + LT_ERROR_MAX +}; + +/* These functions are only useful from inside custom module loaders. */ +extern int lt_dladderror LT_PARAMS((const char *diagnostic)); +extern int lt_dlseterror LT_PARAMS((int errorcode)); + + + + +/* --- SOURCE COMPATIBILITY WITH OLD LIBLTDL --- */ + + +#ifdef LT_NON_POSIX_NAMESPACE +# define lt_ptr_t lt_ptr +# define lt_module_t lt_module +# define lt_module_open_t lt_module_open +# define lt_module_close_t lt_module_close +# define lt_find_sym_t lt_find_sym +# define lt_dlloader_exit_t lt_dlloader_exit +# define lt_dlloader_t lt_dlloader +# define lt_dlloader_data_t lt_user_data +#endif + +LT_END_C_DECLS + +#endif /* !LTDL_H */