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guile/libguile/filesys.c
Jim Blandy 0d03da62e3 Change the name of the objects returned by OPENDIR from 
"directory" to "directory stream".  A predicate named "directory?"
would be confusing.
* filesys.c (scm_directory_stream_p): Renamed from scm_directory_p.
At the Scheme level, "directory?" -> "directory-stream?".
(scm_dir_print): Use the phrase "directory stream" in printed form.
* filesys.h (scm_directory_stream_p): Prototype renamed
accordingly.
1999-09-12 03:47:39 +00:00

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/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
*
* This program 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.
*
* This program 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 this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
#include <stdio.h>
#include "_scm.h"
#include "genio.h"
#include "smob.h"
#include "feature.h"
#include "fports.h"
#include "iselect.h"
#include "filesys.h"
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef LIBC_H_WITH_UNISTD_H
#include <libc.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pwd.h>
#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
/* Ultrix has S_IFSOCK, but no S_ISSOCK. Ipe! */
#if defined (S_IFSOCK) && ! defined (S_ISSOCK)
#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
#endif
/* {Permissions}
*/
SCM_PROC (s_chown, "chown", 3, 0, 0, scm_chown);
SCM
scm_chown (object, owner, group)
SCM object;
SCM owner;
SCM group;
{
int rv;
int fdes;
object = SCM_COERCE_OUTPORT (object);
SCM_ASSERT (SCM_INUMP (owner), owner, SCM_ARG2, s_chown);
SCM_ASSERT (SCM_INUMP (group), group, SCM_ARG3, s_chown);
if (SCM_INUMP (object) || (SCM_NIMP (object) && SCM_OPFPORTP (object)))
{
if (SCM_INUMP (object))
fdes = SCM_INUM (object);
else
fdes = SCM_FPORT_FDES (object);
SCM_SYSCALL (rv = fchown (fdes, SCM_INUM (owner), SCM_INUM (group)));
}
else
{
SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object),
object, SCM_ARG1, s_chown);
SCM_COERCE_SUBSTR (object);
SCM_SYSCALL (rv = chown (SCM_ROCHARS (object),
SCM_INUM (owner), SCM_INUM (group)));
}
if (rv == -1)
scm_syserror (s_chown);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_chmod, "chmod", 2, 0, 0, scm_chmod);
SCM
scm_chmod (object, mode)
SCM object;
SCM mode;
{
int rv;
int fdes;
object = SCM_COERCE_OUTPORT (object);
SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_chmod);
if (SCM_INUMP (object) || (SCM_NIMP (object) && SCM_OPFPORTP (object)))
{
if (SCM_INUMP (object))
fdes = SCM_INUM (object);
else
fdes = SCM_FPORT_FDES (object);
SCM_SYSCALL (rv = fchmod (fdes, SCM_INUM (mode)));
}
else
{
SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object),
object, SCM_ARG1, s_chmod);
SCM_COERCE_SUBSTR (object);
SCM_SYSCALL (rv = chmod (SCM_ROCHARS (object), SCM_INUM (mode)));
}
if (rv == -1)
scm_syserror (s_chmod);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_umask, "umask", 0, 1, 0, scm_umask);
SCM
scm_umask (mode)
SCM mode;
{
mode_t mask;
if (SCM_UNBNDP (mode))
{
mask = umask (0);
umask (mask);
}
else
{
SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG1, s_umask);
mask = umask (SCM_INUM (mode));
}
return SCM_MAKINUM (mask);
}
SCM_PROC (s_open_fdes, "open-fdes", 2, 1, 0, scm_open_fdes);
SCM
scm_open_fdes (SCM path, SCM flags, SCM mode)
{
int fd;
int iflags;
int imode;
SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
s_open_fdes);
SCM_COERCE_SUBSTR (path);
iflags = scm_num2long (flags, (char *) SCM_ARG2, s_open_fdes);
if (SCM_UNBNDP (mode))
imode = 0666;
else
{
SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG3, s_open_fdes);
imode = SCM_INUM (mode);
}
SCM_SYSCALL (fd = open (SCM_ROCHARS (path), iflags, imode));
if (fd == -1)
scm_syserror (s_open_fdes);
return SCM_MAKINUM (fd);
}
SCM_PROC (s_open, "open", 2, 1, 0, scm_open);
SCM
scm_open (SCM path, SCM flags, SCM mode)
{
SCM newpt;
char *port_mode;
int fd;
int iflags;
fd = SCM_INUM (scm_open_fdes (path, flags, mode));
iflags = scm_num2long (flags, (char *) SCM_ARG2, s_open_fdes);
if (iflags & O_RDWR)
{
if (iflags & O_APPEND)
port_mode = "a+";
else if (iflags & O_CREAT)
port_mode = "w+";
else
port_mode = "r+";
}
else {
if (iflags & O_APPEND)
port_mode = "a";
else if (iflags & O_WRONLY)
port_mode = "w";
else
port_mode = "r";
}
newpt = scm_fdes_to_port (fd, port_mode, path);
return newpt;
}
SCM_PROC (s_close, "close", 1, 0, 0, scm_close);
SCM
scm_close (SCM fd_or_port)
{
int rv;
int fd;
fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
if (SCM_NIMP (fd_or_port) && SCM_PORTP (fd_or_port))
return scm_close_port (fd_or_port);
SCM_ASSERT (SCM_INUMP (fd_or_port), fd_or_port, SCM_ARG1, s_close);
fd = SCM_INUM (fd_or_port);
scm_evict_ports (fd); /* see scsh manual. */
SCM_SYSCALL (rv = close (fd));
/* following scsh, closing an already closed file descriptor is
not an error. */
if (rv < 0 && errno != EBADF)
scm_syserror (s_close);
return (rv < 0) ? SCM_BOOL_F : SCM_BOOL_T;
}
/* {Files}
*/
SCM_SYMBOL (scm_sym_regular, "regular");
SCM_SYMBOL (scm_sym_directory, "directory");
#ifdef HAVE_S_ISLNK
SCM_SYMBOL (scm_sym_symlink, "symlink");
#endif
SCM_SYMBOL (scm_sym_block_special, "block-special");
SCM_SYMBOL (scm_sym_char_special, "char-special");
SCM_SYMBOL (scm_sym_fifo, "fifo");
SCM_SYMBOL (scm_sym_sock, "socket");
SCM_SYMBOL (scm_sym_unknown, "unknown");
static SCM scm_stat2scm SCM_P ((struct stat *stat_temp));
static SCM
scm_stat2scm (stat_temp)
struct stat *stat_temp;
{
SCM ans = scm_make_vector (SCM_MAKINUM (15), SCM_UNSPECIFIED);
SCM *ve = SCM_VELTS (ans);
ve[0] = scm_ulong2num ((unsigned long) stat_temp->st_dev);
ve[1] = scm_ulong2num ((unsigned long) stat_temp->st_ino);
ve[2] = scm_ulong2num ((unsigned long) stat_temp->st_mode);
ve[3] = scm_ulong2num ((unsigned long) stat_temp->st_nlink);
ve[4] = scm_ulong2num ((unsigned long) stat_temp->st_uid);
ve[5] = scm_ulong2num ((unsigned long) stat_temp->st_gid);
#ifdef HAVE_ST_RDEV
ve[6] = scm_ulong2num ((unsigned long) stat_temp->st_rdev);
#else
ve[6] = SCM_BOOL_F;
#endif
ve[7] = scm_ulong2num ((unsigned long) stat_temp->st_size);
ve[8] = scm_ulong2num ((unsigned long) stat_temp->st_atime);
ve[9] = scm_ulong2num ((unsigned long) stat_temp->st_mtime);
ve[10] = scm_ulong2num ((unsigned long) stat_temp->st_ctime);
#ifdef HAVE_ST_BLKSIZE
ve[11] = scm_ulong2num ((unsigned long) stat_temp->st_blksize);
#else
ve[11] = scm_ulong2num (4096L);
#endif
#ifdef HAVE_ST_BLOCKS
ve[12] = scm_ulong2num ((unsigned long) stat_temp->st_blocks);
#else
ve[12] = SCM_BOOL_F;
#endif
{
int mode = stat_temp->st_mode;
if (S_ISREG (mode))
ve[13] = scm_sym_regular;
else if (S_ISDIR (mode))
ve[13] = scm_sym_directory;
#ifdef HAVE_S_ISLNK
else if (S_ISLNK (mode))
ve[13] = scm_sym_symlink;
#endif
else if (S_ISBLK (mode))
ve[13] = scm_sym_block_special;
else if (S_ISCHR (mode))
ve[13] = scm_sym_char_special;
else if (S_ISFIFO (mode))
ve[13] = scm_sym_fifo;
else if (S_ISSOCK (mode))
ve[13] = scm_sym_sock;
else
ve[13] = scm_sym_unknown;
ve[14] = SCM_MAKINUM ((~S_IFMT) & mode);
/* the layout of the bits in ve[14] is intended to be portable.
If there are systems that don't follow the usual convention,
the following could be used:
tmp = 0;
if (S_ISUID & mode) tmp += 1;
tmp <<= 1;
if (S_IRGRP & mode) tmp += 1;
tmp <<= 1;
if (S_ISVTX & mode) tmp += 1;
tmp <<= 1;
if (S_IRUSR & mode) tmp += 1;
tmp <<= 1;
if (S_IWUSR & mode) tmp += 1;
tmp <<= 1;
if (S_IXUSR & mode) tmp += 1;
tmp <<= 1;
if (S_IWGRP & mode) tmp += 1;
tmp <<= 1;
if (S_IXGRP & mode) tmp += 1;
tmp <<= 1;
if (S_IROTH & mode) tmp += 1;
tmp <<= 1;
if (S_IWOTH & mode) tmp += 1;
tmp <<= 1;
if (S_IXOTH & mode) tmp += 1;
ve[14] = SCM_MAKINUM (tmp);
*/
}
return ans;
}
SCM_PROC (s_stat, "stat", 1, 0, 0, scm_stat);
SCM
scm_stat (object)
SCM object;
{
int rv;
int fdes;
struct stat stat_temp;
if (SCM_INUMP (object))
SCM_SYSCALL (rv = fstat (SCM_INUM (object), &stat_temp));
else
{
SCM_ASSERT (SCM_NIMP (object), object, SCM_ARG1, s_stat);
if (SCM_ROSTRINGP (object))
{
SCM_COERCE_SUBSTR (object);
SCM_SYSCALL (rv = stat (SCM_ROCHARS (object), &stat_temp));
}
else
{
object = SCM_COERCE_OUTPORT (object);
SCM_ASSERT (SCM_OPFPORTP (object), object, SCM_ARG1, s_stat);
fdes = SCM_FPORT_FDES (object);
SCM_SYSCALL (rv = fstat (fdes, &stat_temp));
}
}
if (rv == -1)
{
int en = errno;
scm_syserror_msg (s_stat, "%s: %S",
scm_listify (scm_makfrom0str (strerror (errno)),
object,
SCM_UNDEFINED),
en);
}
return scm_stat2scm (&stat_temp);
}
/* {Modifying Directories}
*/
SCM_PROC (s_link, "link", 2, 0, 0, scm_link);
SCM
scm_link (oldpath, newpath)
SCM oldpath;
SCM newpath;
{
int val;
SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath,
SCM_ARG1, s_link);
if (SCM_SUBSTRP (oldpath))
oldpath = scm_makfromstr (SCM_ROCHARS (oldpath),
SCM_ROLENGTH (oldpath), 0);
SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath,
SCM_ARG2, s_link);
if (SCM_SUBSTRP (newpath))
newpath = scm_makfromstr (SCM_ROCHARS (newpath),
SCM_ROLENGTH (newpath), 0);
SCM_SYSCALL (val = link (SCM_ROCHARS (oldpath), SCM_ROCHARS (newpath)));
if (val != 0)
scm_syserror (s_link);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_rename, "rename-file", 2, 0, 0, scm_rename);
SCM
scm_rename (oldname, newname)
SCM oldname;
SCM newname;
{
int rv;
SCM_ASSERT (SCM_NIMP (oldname) && SCM_ROSTRINGP (oldname), oldname, SCM_ARG1,
s_rename);
SCM_ASSERT (SCM_NIMP (newname) && SCM_ROSTRINGP (newname), newname, SCM_ARG2,
s_rename);
SCM_COERCE_SUBSTR (oldname);
SCM_COERCE_SUBSTR (newname);
#ifdef HAVE_RENAME
SCM_SYSCALL (rv = rename (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
#else
SCM_SYSCALL (rv = link (SCM_ROCHARS (oldname), SCM_ROCHARS (newname)));
if (rv == 0)
{
SCM_SYSCALL (rv = unlink (SCM_ROCHARS (oldname)));;
if (rv != 0)
/* unlink failed. remove new name */
SCM_SYSCALL (unlink (SCM_ROCHARS (newname)));
}
#endif
if (rv != 0)
scm_syserror (s_rename);
return SCM_UNSPECIFIED;
}
SCM_PROC(s_delete_file, "delete-file", 1, 0, 0, scm_delete_file);
SCM
scm_delete_file (str)
SCM str;
{
int ans;
SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1,
s_delete_file);
SCM_COERCE_SUBSTR (str);
SCM_SYSCALL (ans = unlink (SCM_ROCHARS (str)));
if (ans != 0)
scm_syserror (s_delete_file);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_mkdir, "mkdir", 1, 1, 0, scm_mkdir);
SCM
scm_mkdir (path, mode)
SCM path;
SCM mode;
{
#ifdef HAVE_MKDIR
int rv;
mode_t mask;
SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
s_mkdir);
SCM_COERCE_SUBSTR (path);
if (SCM_UNBNDP (mode))
{
mask = umask (0);
umask (mask);
SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), 0777 ^ mask));
}
else
{
SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_mkdir);
SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), SCM_INUM (mode)));
}
if (rv != 0)
scm_syserror (s_mkdir);
return SCM_UNSPECIFIED;
#else
scm_sysmissing (s_mkdir);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_rmdir, "rmdir", 1, 0, 0, scm_rmdir);
SCM
scm_rmdir (path)
SCM path;
{
#ifdef HAVE_RMDIR
int val;
SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, SCM_ARG1,
s_rmdir);
SCM_COERCE_SUBSTR (path);
SCM_SYSCALL (val = rmdir (SCM_ROCHARS (path)));
if (val != 0)
scm_syserror (s_rmdir);
return SCM_UNSPECIFIED;
#else
scm_sysmissing (s_rmdir);
/* not reached. */
return SCM_BOOL_F;
#endif
}
/* {Examining Directories}
*/
long scm_tc16_dir;
SCM_PROC (s_directory_stream_p, "directory-stream?", 1, 0, 0, scm_directory_stream_p);
SCM
scm_directory_stream_p (SCM obj)
{
return SCM_NIMP (obj) && SCM_DIRP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
}
SCM_PROC (s_opendir, "opendir", 1, 0, 0, scm_opendir);
SCM
scm_opendir (dirname)
SCM dirname;
{
DIR *ds;
SCM_ASSERT (SCM_NIMP (dirname) && SCM_ROSTRINGP (dirname), dirname, SCM_ARG1,
s_opendir);
SCM_COERCE_SUBSTR (dirname);
SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname)));
if (ds == NULL)
scm_syserror (s_opendir);
SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_OPN, ds);
}
SCM_PROC (s_readdir, "readdir", 1, 0, 0, scm_readdir);
SCM
scm_readdir (port)
SCM port;
{
struct dirent *rdent;
SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_readdir);
errno = 0;
SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port)));
if (errno != 0)
scm_syserror (s_readdir);
return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0)
: SCM_EOF_VAL);
}
SCM_PROC (s_rewinddir, "rewinddir", 1, 0, 0, scm_rewinddir);
SCM
scm_rewinddir (port)
SCM port;
{
SCM_ASSERT (SCM_NIMP (port) && SCM_OPDIRP (port), port, SCM_ARG1, s_rewinddir);
rewinddir ((DIR *) SCM_CDR (port));
return SCM_UNSPECIFIED;
}
SCM_PROC (s_closedir, "closedir", 1, 0, 0, scm_closedir);
SCM
scm_closedir (port)
SCM port;
{
int sts;
SCM_ASSERT (SCM_NIMP (port) && SCM_DIRP (port), port, SCM_ARG1, s_closedir);
if (SCM_CLOSEDP (port))
{
return SCM_UNSPECIFIED;
}
SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port)));
if (sts != 0)
scm_syserror (s_closedir);
SCM_SETCAR (port, scm_tc16_dir);
return SCM_UNSPECIFIED;
}
static int scm_dir_print SCM_P ((SCM sexp, SCM port, scm_print_state *pstate));
static int
scm_dir_print (SCM exp, SCM port, scm_print_state *pstate)
{
scm_puts ("#<", port);
if (SCM_CLOSEDP (exp))
scm_puts ("closed: ", port);
scm_puts ("directory stream ", port);
scm_intprint (SCM_CDR (exp), 16, port);
scm_putc ('>', port);
return 1;
}
static scm_sizet scm_dir_free SCM_P ((SCM p));
static scm_sizet
scm_dir_free (p)
SCM p;
{
if (SCM_OPENP (p))
closedir ((DIR *) SCM_CDR (p));
return 0;
}
/* {Navigating Directories}
*/
SCM_PROC (s_chdir, "chdir", 1, 0, 0, scm_chdir);
SCM
scm_chdir (str)
SCM str;
{
int ans;
SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG1, s_chdir);
SCM_COERCE_SUBSTR (str);
SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str)));
if (ans != 0)
scm_syserror (s_chdir);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_getcwd, "getcwd", 0, 0, 0, scm_getcwd);
SCM
scm_getcwd ()
{
#ifdef HAVE_GETCWD
char *rv;
scm_sizet size = 100;
char *wd;
SCM result;
wd = scm_must_malloc (size, s_getcwd);
while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
{
scm_must_free (wd);
size *= 2;
wd = scm_must_malloc (size, s_getcwd);
}
if (rv == 0)
scm_syserror (s_getcwd);
result = scm_makfromstr (wd, strlen (wd), 0);
scm_must_free (wd);
return result;
#else
scm_sysmissing (s_getcwd);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_select, "select", 3, 2, 0, scm_select);
static int
set_element (SELECT_TYPE *set, SCM element, int arg)
{
int fd;
element = SCM_COERCE_OUTPORT (element);
if (SCM_NIMP (element) && SCM_OPFPORTP (element))
fd = SCM_FPORT_FDES (element);
else {
SCM_ASSERT (SCM_INUMP (element), element, arg, s_select);
fd = SCM_INUM (element);
}
FD_SET (fd, set);
return fd;
}
static int
fill_select_type (SELECT_TYPE *set, SCM list, int arg)
{
int max_fd = 0, fd;
if (SCM_NIMP (list) && SCM_VECTORP (list))
{
int len = SCM_LENGTH (list);
SCM *ve = SCM_VELTS (list);
while (len > 0)
{
fd = set_element (set, ve[len - 1], arg);
if (fd > max_fd)
max_fd = fd;
len--;
}
}
else
{
while (list != SCM_EOL)
{
fd = set_element (set, SCM_CAR (list), arg);
if (fd > max_fd)
max_fd = fd;
list = SCM_CDR (list);
}
}
return max_fd;
}
static SCM
get_element (SELECT_TYPE *set, SCM element, SCM list)
{
element = SCM_COERCE_OUTPORT (element);
if (SCM_NIMP (element) && SCM_OPFPORTP (element))
{
if (FD_ISSET (SCM_FPORT_FDES (element), set))
list = scm_cons (element, list);
}
else if (SCM_INUMP (element))
{
if (FD_ISSET (SCM_INUM (element), set))
list = scm_cons (element, list);
}
return list;
}
static SCM
retrieve_select_type (SELECT_TYPE *set, SCM list)
{
SCM answer_list = SCM_EOL;
if (SCM_NIMP (list) && SCM_VECTORP (list))
{
int len = SCM_LENGTH (list);
SCM *ve = SCM_VELTS (list);
while (len > 0)
{
answer_list = get_element (set, ve[len - 1], answer_list);
len--;
}
return scm_vector (answer_list);
}
else
{
/* list is a list. */
while (list != SCM_EOL)
{
answer_list = get_element (set, SCM_CAR (list), answer_list);
list = SCM_CDR (list);
}
return answer_list;
}
}
SCM
scm_select (reads, writes, excepts, secs, usecs)
SCM reads;
SCM writes;
SCM excepts;
SCM secs;
SCM usecs;
{
#ifdef HAVE_SELECT
struct timeval timeout;
struct timeval * time_p;
SELECT_TYPE read_set;
SELECT_TYPE write_set;
SELECT_TYPE except_set;
int max_fd, fd;
int sreturn;
#define assert_set(x, arg) \
SCM_ASSERT (scm_ilength (x) > -1 || (SCM_NIMP (x) && SCM_VECTORP (x)), \
x, arg, s_select)
assert_set (reads, SCM_ARG1);
assert_set (writes, SCM_ARG2);
assert_set (excepts, SCM_ARG3);
#undef assert_set
FD_ZERO (&read_set);
FD_ZERO (&write_set);
FD_ZERO (&except_set);
max_fd = fill_select_type (&read_set, reads, SCM_ARG1);
fd = fill_select_type (&write_set, writes, SCM_ARG2);
if (fd > max_fd)
max_fd = fd;
fd = fill_select_type (&except_set, excepts, SCM_ARG3);
if (fd > max_fd)
max_fd = fd;
if (SCM_UNBNDP (secs) || SCM_FALSEP (secs))
time_p = 0;
else
{
if (SCM_INUMP (secs))
{
timeout.tv_sec = SCM_INUM (secs);
if (SCM_UNBNDP (usecs))
timeout.tv_usec = 0;
else
{
SCM_ASSERT (SCM_INUMP (usecs), usecs, SCM_ARG5, s_select);
timeout.tv_usec = SCM_INUM (usecs);
}
}
else
{
double fl = scm_num2dbl (secs, s_select);
if (!SCM_UNBNDP (usecs))
scm_wrong_type_arg (s_select, 4, secs);
if (fl > LONG_MAX)
scm_out_of_range (s_select, secs);
timeout.tv_sec = (long) fl;
timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
}
time_p = &timeout;
}
#ifdef GUILE_ISELECT
sreturn = scm_internal_select (max_fd + 1,
&read_set, &write_set, &except_set, time_p);
#else
sreturn = select (max_fd + 1,
&read_set, &write_set, &except_set, time_p);
#endif
if (sreturn < 0)
scm_syserror (s_select);
return scm_listify (retrieve_select_type (&read_set, reads),
retrieve_select_type (&write_set, writes),
retrieve_select_type (&except_set, excepts),
SCM_UNDEFINED);
#else
scm_sysmissing (s_select);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_fcntl, "fcntl", 2, 0, 1, scm_fcntl);
SCM
scm_fcntl (SCM object, SCM cmd, SCM value)
{
int rv;
int fdes;
int ivalue;
object = SCM_COERCE_OUTPORT (object);
SCM_ASSERT (SCM_INUMP (cmd), cmd, SCM_ARG2, s_fcntl);
if (SCM_NIMP (object) && SCM_OPFPORTP (object))
fdes = SCM_FPORT_FDES (object);
else
{
SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fcntl);
fdes = SCM_INUM (object);
}
if (SCM_NULLP (value))
ivalue = 0;
else
{
SCM_ASSERT (SCM_INUMP (SCM_CAR (value)), value, SCM_ARG3, s_fcntl);
ivalue = SCM_INUM (SCM_CAR (value));
}
SCM_SYSCALL (rv = fcntl (fdes, SCM_INUM (cmd), ivalue));
if (rv == -1)
scm_syserror (s_fcntl);
return SCM_MAKINUM (rv);
}
SCM_PROC (s_fsync, "fsync", 1, 0, 0, scm_fsync);
SCM
scm_fsync (SCM object)
{
int fdes;
object = SCM_COERCE_OUTPORT (object);
if (SCM_NIMP (object) && SCM_OPFPORTP (object))
{
scm_flush (object);
fdes = SCM_FPORT_FDES (object);
}
else
{
SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fsync);
fdes = SCM_INUM (object);
}
if (fsync (fdes) == -1)
scm_syserror (s_fsync);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_symlink, "symlink", 2, 0, 0, scm_symlink);
SCM
scm_symlink(oldpath, newpath)
SCM oldpath;
SCM newpath;
{
#ifdef HAVE_SYMLINK
int val;
SCM_ASSERT (SCM_NIMP (oldpath) && SCM_ROSTRINGP (oldpath), oldpath, SCM_ARG1,
s_symlink);
SCM_ASSERT (SCM_NIMP (newpath) && SCM_ROSTRINGP (newpath), newpath, SCM_ARG2,
s_symlink);
SCM_COERCE_SUBSTR (oldpath);
SCM_COERCE_SUBSTR (newpath);
SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath)));
if (val != 0)
scm_syserror (s_symlink);
return SCM_UNSPECIFIED;
#else
scm_sysmissing (s_symlink);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_readlink, "readlink", 1, 0, 0, scm_readlink);
SCM
scm_readlink(path)
SCM path;
{
#ifdef HAVE_READLINK
int rv;
int size = 100;
char *buf;
SCM result;
SCM_ASSERT (SCM_NIMP (path) && SCM_ROSTRINGP (path), path, (char *) SCM_ARG1,
s_readlink);
SCM_COERCE_SUBSTR (path);
buf = scm_must_malloc (size, s_readlink);
while ((rv = readlink (SCM_ROCHARS (path), buf, size)) == size)
{
scm_must_free (buf);
size *= 2;
buf = scm_must_malloc (size, s_readlink);
}
if (rv == -1)
scm_syserror (s_readlink);
result = scm_makfromstr (buf, rv, 0);
scm_must_free (buf);
return result;
#else
scm_sysmissing (s_readlink);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_lstat, "lstat", 1, 0, 0, scm_lstat);
SCM
scm_lstat(str)
SCM str;
{
#ifdef HAVE_LSTAT
int rv;
struct stat stat_temp;
SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, (char *) SCM_ARG1,
s_lstat);
SCM_COERCE_SUBSTR (str);
SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp));
if (rv != 0)
{
int en = errno;
scm_syserror_msg (s_lstat, "%s: %S",
scm_listify (scm_makfrom0str (strerror (errno)),
str,
SCM_UNDEFINED),
en);
}
return scm_stat2scm(&stat_temp);
#else
scm_sysmissing (s_lstat);
/* not reached. */
return SCM_BOOL_F;
#endif
}
SCM_PROC (s_copy_file, "copy-file", 2, 0, 0, scm_copy_file);
SCM
scm_copy_file (oldfile, newfile)
SCM oldfile;
SCM newfile;
{
int oldfd, newfd;
int n;
char buf[BUFSIZ];
struct stat oldstat;
SCM_ASSERT (SCM_NIMP (oldfile) && SCM_ROSTRINGP (oldfile), oldfile, SCM_ARG1, s_copy_file);
if (SCM_SUBSTRP (oldfile))
oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0);
SCM_ASSERT (SCM_NIMP (newfile) && SCM_ROSTRINGP (newfile), newfile, SCM_ARG2, s_copy_file);
if (SCM_SUBSTRP (newfile))
newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0);
if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1)
scm_syserror (s_copy_file);
oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY);
if (oldfd == -1)
scm_syserror (s_copy_file);
/* use POSIX flags instead of 07777?. */
newfd = open (SCM_ROCHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
oldstat.st_mode & 07777);
if (newfd == -1)
scm_syserror (s_copy_file);
while ((n = read (oldfd, buf, sizeof buf)) > 0)
if (write (newfd, buf, n) != n)
{
close (oldfd);
close (newfd);
scm_syserror (s_copy_file);
}
close (oldfd);
if (close (newfd) == -1)
scm_syserror (s_copy_file);
return SCM_UNSPECIFIED;
}
/* Filename manipulation */
SCM scm_dot_string;
SCM_PROC (s_dirname, "dirname", 1, 0, 0, scm_dirname);
SCM
scm_dirname (SCM filename)
{
char *s;
int i, len;
SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
filename,
SCM_ARG1,
s_dirname);
s = SCM_ROCHARS (filename);
len = SCM_LENGTH (filename);
i = len - 1;
while (i >= 0 && s[i] == '/') --i;
while (i >= 0 && s[i] != '/') --i;
while (i >= 0 && s[i] == '/') --i;
if (i < 0)
{
if (len > 0 && s[0] == '/')
return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
else
return scm_dot_string;
}
else
return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (i + 1));
}
SCM_PROC (s_basename, "basename", 1, 1, 0, scm_basename);
SCM
scm_basename (SCM filename, SCM suffix)
{
char *f, *s = 0;
int i, j, len, end;
SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename),
filename,
SCM_ARG1,
s_basename);
SCM_ASSERT (SCM_UNBNDP (suffix)
|| (SCM_NIMP (suffix) && SCM_ROSTRINGP (suffix)),
suffix,
SCM_ARG2,
s_basename);
f = SCM_ROCHARS (filename);
if (SCM_UNBNDP (suffix))
j = -1;
else
{
s = SCM_ROCHARS (suffix);
j = SCM_LENGTH (suffix) - 1;
}
len = SCM_LENGTH (filename);
i = len - 1;
while (i >= 0 && f[i] == '/') --i;
end = i;
while (i >= 0 && j >= 0 && f[i] == s[j]) --i, --j;
if (j == -1)
end = i;
while (i >= 0 && f[i] != '/') --i;
if (i == end)
{
if (len > 0 && f[0] == '/')
return scm_make_shared_substring (filename, SCM_INUM0, SCM_MAKINUM (1));
else
return scm_dot_string;
}
else
return scm_make_shared_substring (filename,
SCM_MAKINUM (i + 1),
SCM_MAKINUM (end + 1));
}
void
scm_init_filesys ()
{
scm_add_feature ("i/o-extensions");
scm_tc16_dir = scm_make_smob_type_mfpe ("directory", 0,
NULL, scm_dir_free,scm_dir_print, NULL);
scm_dot_string = scm_permanent_object (scm_makfrom0str ("."));
#ifdef O_RDONLY
scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY));
#endif
#ifdef O_WRONLY
scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY));
#endif
#ifdef O_RDWR
scm_sysintern ("O_RDWR", scm_long2num (O_RDWR));
#endif
#ifdef O_CREAT
scm_sysintern ("O_CREAT", scm_long2num (O_CREAT));
#endif
#ifdef O_EXCL
scm_sysintern ("O_EXCL", scm_long2num (O_EXCL));
#endif
#ifdef O_NOCTTY
scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY));
#endif
#ifdef O_TRUNC
scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC));
#endif
#ifdef O_APPEND
scm_sysintern ("O_APPEND", scm_long2num (O_APPEND));
#endif
#ifdef O_NONBLOCK
scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK));
#endif
#ifdef O_NDELAY
scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY));
#endif
#ifdef O_SYNC
scm_sysintern ("O_SYNC", scm_long2num (O_SYNC));
#endif
#ifdef F_DUPFD
scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD));
#endif
#ifdef F_GETFD
scm_sysintern ("F_GETFD", scm_long2num (F_GETFD));
#endif
#ifdef F_SETFD
scm_sysintern ("F_SETFD", scm_long2num (F_SETFD));
#endif
#ifdef F_GETFL
scm_sysintern ("F_GETFL", scm_long2num (F_GETFL));
#endif
#ifdef F_SETFL
scm_sysintern ("F_SETFL", scm_long2num (F_SETFL));
#endif
#ifdef F_GETOWN
scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN));
#endif
#ifdef F_SETOWN
scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN));
#endif
#ifdef FD_CLOEXEC
scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC));
#endif
#include "filesys.x"
}
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