/* 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. */ /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ #include #include "_scm.h" #include "genio.h" #include "smob.h" #include "feature.h" #include "fports.h" #include "iselect.h" #include "scm_validate.h" #include "filesys.h" #ifdef HAVE_IO_H #include #endif #ifdef TIME_WITH_SYS_TIME # include # include #else # if HAVE_SYS_TIME_H # include # else # include # endif #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef LIBC_H_WITH_UNISTD_H #include #endif #ifdef HAVE_SYS_SELECT_H #include #endif #ifdef HAVE_STRING_H #include #endif #include #include #include #include #if HAVE_DIRENT_H # include # define NAMLEN(dirent) strlen((dirent)->d_name) #else # define dirent direct # define 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 /* 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_DEFINE (scm_chown, "chown", 3, 0, 0, (SCM object, SCM owner, SCM group), "Change the ownership and group of the file referred to by @var{obj} to\n" "the integer userid values @var{owner} and @var{group}. @var{obj} can be\n" "a string containing a file name or a port or integer file descriptor\n" "which is open on the file (in which case fchown is used as the underlying\n" "system call). The return value\n" "is unspecified.\n\n" "If @var{obj} is a symbolic link, either the\n" "ownership of the link or the ownership of the referenced file will be\n" "changed depending on the operating system (lchown is\n" "unsupported at present). If @var{owner} or @var{group} is specified\n" "as @code{-1}, then that ID is not changed.") #define FUNC_NAME s_scm_chown { int rv; int fdes; object = SCM_COERCE_OUTPORT (object); SCM_VALIDATE_INUM (2,owner); SCM_VALIDATE_INUM (3,group); if (SCM_INUMP (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_VALIDATE_ROSTRING(1,object); SCM_COERCE_SUBSTR (object); SCM_SYSCALL (rv = chown (SCM_ROCHARS (object), SCM_INUM (owner), SCM_INUM (group))); } if (rv == -1) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME SCM_DEFINE (scm_chmod, "chmod", 2, 0, 0, (SCM object, SCM mode), "Changes the permissions of the file referred to by @var{obj}.\n" "@var{obj} can be a string containing a file name or a port or integer file\n" "descriptor which is open on a file (in which case @code{fchmod} is used\n" "as the underlying system call).\n" "@var{mode} specifies\n" "the new permissions as a decimal number, e.g., @code{(chmod \"foo\" #o755)}.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_chmod { int rv; int fdes; object = SCM_COERCE_OUTPORT (object); SCM_VALIDATE_INUM (2,mode); if (SCM_INUMP (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_VALIDATE_ROSTRING (1,object); SCM_COERCE_SUBSTR (object); SCM_SYSCALL (rv = chmod (SCM_ROCHARS (object), SCM_INUM (mode))); } if (rv == -1) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME SCM_DEFINE (scm_umask, "umask", 0, 1, 0, (SCM mode), "If @var{mode} is omitted, retuns a decimal number representing the current\n" "file creation mask. Otherwise the file creation mask is set to\n" "@var{mode} and the previous value is returned.\n\n" "E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18.") #define FUNC_NAME s_scm_umask { mode_t mask; if (SCM_UNBNDP (mode)) { mask = umask (0); umask (mask); } else { SCM_VALIDATE_INUM (1,mode); mask = umask (SCM_INUM (mode)); } return SCM_MAKINUM (mask); } #undef FUNC_NAME SCM_DEFINE (scm_open_fdes, "open-fdes", 2, 1, 0, (SCM path, SCM flags, SCM mode), "Similar to @code{open} but returns a file descriptor instead of a\n" "port.") #define FUNC_NAME s_scm_open_fdes { int fd; int iflags; int imode; SCM_VALIDATE_ROSTRING (1,path); SCM_COERCE_SUBSTR (path); iflags = SCM_NUM2LONG(2,flags); imode = SCM_NUM2LONG_DEF(3,mode,0666); SCM_SYSCALL (fd = open (SCM_ROCHARS (path), iflags, imode)); if (fd == -1) SCM_SYSERROR; return SCM_MAKINUM (fd); } #undef FUNC_NAME SCM_DEFINE (scm_open, "open", 2, 1, 0, (SCM path, SCM flags, SCM mode), "Open the file named by @var{path} for reading and/or writing.\n" "@var{flags} is an integer specifying how the file should be opened.\n" "@var{mode} is an integer specifying the permission bits of the file, if\n" "it needs to be created, before the umask is applied. The default is 666\n" "(Unix itself has no default).\n\n" "@var{flags} can be constructed by combining variables using @code{logior}.\n" "Basic flags are:\n\n" "@defvar O_RDONLY\n" "Open the file read-only.\n" "@end defvar\n" "@defvar O_WRONLY\n" "Open the file write-only. \n" "@end defvar\n" "@defvar O_RDWR\n" "Open the file read/write.\n" "@end defvar\n" "@defvar O_APPEND\n" "Append to the file instead of truncating.\n" "@end defvar\n" "@defvar O_CREAT\n" "Create the file if it does not already exist.\n" "@end defvar\n\n" "See the Unix documentation of the @code{open} system call\n" "for additional flags.") #define FUNC_NAME s_scm_open { SCM newpt; char *port_mode; int fd; int iflags; fd = SCM_INUM (scm_open_fdes (path, flags, mode)); iflags = SCM_NUM2LONG (2,flags); 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; } #undef FUNC_NAME SCM_DEFINE (scm_close, "close", 1, 0, 0, (SCM fd_or_port), "Similar to close-port (@pxref{Generic Port Operations, close-port}),\n" "but also works on file descriptors. A side\n" "effect of closing a file descriptor is that any ports using that file\n" "descriptor are moved to a different file descriptor and have\n" "their revealed counts set to zero.") #define FUNC_NAME s_scm_close { int rv; int fd; fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); if (SCM_PORTP (fd_or_port)) return scm_close_port (fd_or_port); SCM_VALIDATE_INUM (1,fd_or_port); 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; return SCM_NEGATE_BOOL(rv < 0); } #undef FUNC_NAME /* {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 (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_DEFINE (scm_stat, "stat", 1, 0, 0, (SCM object), "Returns an object containing various information\n" "about the file determined by @var{obj}.\n" "@var{obj} can be a string containing a file name or a port or integer file\n" "descriptor which is open on a file (in which case @code{fstat} is used\n" "as the underlying system call).\n\n" "The object returned by @code{stat} can be passed as a single parameter\n" "to the following procedures, all of which return integers:\n\n" "@table @code\n" "@item stat:dev\n" "The device containing the file.\n" "@item stat:ino\n" "The file serial number, which distinguishes this file from all other\n" "files on the same device.\n" "@item stat:mode\n" "The mode of the file. This includes file type information\n" "and the file permission bits. See @code{stat:type} and @code{stat:perms}\n" "below.\n" "@item stat:nlink\n" "The number of hard links to the file.\n" "@item stat:uid\n" "The user ID of the file's owner.\n" "@item stat:gid\n" "The group ID of the file.\n" "@item stat:rdev\n" "Device ID; this entry is defined only for character or block\n" "special files.\n" "@item stat:size\n" "The size of a regular file in bytes.\n" "@item stat:atime\n" "The last access time for the file.\n" "@item stat:mtime\n" "The last modification time for the file.\n" "@item stat:ctime\n" "The last modification time for the attributes of the file.\n" "@item stat:blksize\n" "The optimal block size for reading or writing the file, in bytes.\n" "@item stat:blocks\n" "The amount of disk space that the file occupies measured in units of\n" "512 byte blocks.\n" "@end table\n\n" "In addition, the following procedures return the information\n" "from stat:mode in a more convenient form:\n\n" "@table @code\n" "@item stat:type\n" "A symbol representing the type of file. Possible values are\n" "regular, directory, symlink, block-special, char-special,\n" "fifo, socket and unknown\n" "@item stat:perms\n" "An integer representing the access permission bits.\n" "@end table") #define FUNC_NAME s_scm_stat { int rv; int fdes; struct stat stat_temp; if (SCM_INUMP (object)) SCM_SYSCALL (rv = fstat (SCM_INUM (object), &stat_temp)); else { SCM_VALIDATE_NIM (1,object); if (SCM_ROSTRINGP (object)) { SCM_COERCE_SUBSTR (object); SCM_SYSCALL (rv = stat (SCM_ROCHARS (object), &stat_temp)); } else { object = SCM_COERCE_OUTPORT (object); SCM_VALIDATE_OPFPORT(1,object); fdes = SCM_FPORT_FDES (object); SCM_SYSCALL (rv = fstat (fdes, &stat_temp)); } } if (rv == -1) { int en = errno; SCM_SYSERROR_MSG ("~A: ~S", scm_listify (scm_makfrom0str (strerror (errno)), object, SCM_UNDEFINED), en); } return scm_stat2scm (&stat_temp); } #undef FUNC_NAME /* {Modifying Directories} */ SCM_DEFINE (scm_link, "link", 2, 0, 0, (SCM oldpath, SCM newpath), "Creates a new name @var{path-to} in the file system for the file\n" "named by @var{path-from}. If @var{path-from} is a symbolic link, the\n" "link may or may not be followed depending on the system.") #define FUNC_NAME s_scm_link { int val; SCM_VALIDATE_ROSTRING (1,oldpath); if (SCM_SUBSTRP (oldpath)) oldpath = scm_makfromstr (SCM_ROCHARS (oldpath), SCM_ROLENGTH (oldpath), 0); SCM_VALIDATE_ROSTRING (2,newpath); 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; return SCM_UNSPECIFIED; } #undef FUNC_NAME SCM_DEFINE (scm_rename, "rename-file", 2, 0, 0, (SCM oldname, SCM newname), "Renames the file specified by @var{path-from} to @var{path-to}.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_rename { int rv; SCM_VALIDATE_ROSTRING (1,oldname); SCM_VALIDATE_ROSTRING (2,newname); 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; return SCM_UNSPECIFIED; } #undef FUNC_NAME SCM_DEFINE (scm_delete_file, "delete-file", 1, 0, 0, (SCM str), "Deletes (or \"unlinks\") the file specified by @var{path}.") #define FUNC_NAME s_scm_delete_file { int ans; SCM_VALIDATE_ROSTRING (1,str); SCM_COERCE_SUBSTR (str); SCM_SYSCALL (ans = unlink (SCM_ROCHARS (str))); if (ans != 0) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #ifdef HAVE_MKDIR SCM_DEFINE (scm_mkdir, "mkdir", 1, 1, 0, (SCM path, SCM mode), "Create a new directory named by @var{path}. If @var{mode} is omitted\n" "then the permissions of the directory file are set using the current\n" "umask. Otherwise they are set to the decimal value specified with\n" "@var{mode}. The return value is unspecified.") #define FUNC_NAME s_scm_mkdir { int rv; mode_t mask; SCM_VALIDATE_ROSTRING (1,path); SCM_COERCE_SUBSTR (path); if (SCM_UNBNDP (mode)) { mask = umask (0); umask (mask); SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), 0777 ^ mask)); } else { SCM_VALIDATE_INUM (2,mode); SCM_SYSCALL (rv = mkdir (SCM_ROCHARS (path), SCM_INUM (mode))); } if (rv != 0) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #endif /* HAVE_MKDIR */ #ifdef HAVE_RMDIR SCM_DEFINE (scm_rmdir, "rmdir", 1, 0, 0, (SCM path), "Remove the existing directory named by @var{path}. The directory must\n" "be empty for this to succeed. The return value is unspecified.") #define FUNC_NAME s_scm_rmdir { int val; SCM_VALIDATE_ROSTRING (1,path); SCM_COERCE_SUBSTR (path); SCM_SYSCALL (val = rmdir (SCM_ROCHARS (path))); if (val != 0) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #endif /* {Examining Directories} */ long scm_tc16_dir; SCM_DEFINE (scm_directory_stream_p, "directory-stream?", 1, 0, 0, (SCM obj), "Returns a boolean indicating whether @var{object} is a directory stream\n" "as returned by @code{opendir}.") #define FUNC_NAME s_scm_directory_stream_p { return SCM_BOOL(SCM_DIRP (obj)); } #undef FUNC_NAME SCM_DEFINE (scm_opendir, "opendir", 1, 0, 0, (SCM dirname), "Open the directory specified by @var{path} and return a directory\n" "stream.") #define FUNC_NAME s_scm_opendir { DIR *ds; SCM_VALIDATE_ROSTRING (1,dirname); SCM_COERCE_SUBSTR (dirname); SCM_SYSCALL (ds = opendir (SCM_ROCHARS (dirname))); if (ds == NULL) SCM_SYSERROR; SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_OPN, ds); } #undef FUNC_NAME SCM_DEFINE (scm_readdir, "readdir", 1, 0, 0, (SCM port), "Return (as a string) the next directory entry from the directory stream\n" "@var{stream}. If there is no remaining entry to be read then the\n" "end of file object is returned.") #define FUNC_NAME s_scm_readdir { struct dirent *rdent; SCM_VALIDATE_OPDIR (1,port); errno = 0; SCM_SYSCALL (rdent = readdir ((DIR *) SCM_CDR (port))); if (errno != 0) SCM_SYSERROR; return (rdent ? scm_makfromstr (rdent->d_name, NAMLEN (rdent), 0) : SCM_EOF_VAL); } #undef FUNC_NAME SCM_DEFINE (scm_rewinddir, "rewinddir", 1, 0, 0, (SCM port), "Reset the directory port @var{stream} so that the next call to\n" "@code{readdir} will return the first directory entry.") #define FUNC_NAME s_scm_rewinddir { SCM_VALIDATE_OPDIR (1,port); rewinddir ((DIR *) SCM_CDR (port)); return SCM_UNSPECIFIED; } #undef FUNC_NAME SCM_DEFINE (scm_closedir, "closedir", 1, 0, 0, (SCM port), "Close the directory stream @var{stream}.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_closedir { int sts; SCM_VALIDATE_DIR (1,port); if (SCM_CLOSEDP (port)) { return SCM_UNSPECIFIED; } SCM_SYSCALL (sts = closedir ((DIR *) SCM_CDR (port))); if (sts != 0) SCM_SYSERROR; SCM_SETCAR (port, scm_tc16_dir); return SCM_UNSPECIFIED; } #undef FUNC_NAME 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) { if (SCM_OPENP (p)) closedir ((DIR *) SCM_CDR (p)); return 0; } /* {Navigating Directories} */ SCM_DEFINE (scm_chdir, "chdir", 1, 0, 0, (SCM str), "Change the current working directory to @var{path}.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_chdir { int ans; SCM_VALIDATE_ROSTRING (1,str); SCM_COERCE_SUBSTR (str); SCM_SYSCALL (ans = chdir (SCM_ROCHARS (str))); if (ans != 0) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #ifdef HAVE_GETCWD SCM_DEFINE (scm_getcwd, "getcwd", 0, 0, 0, (), "Returns the name of the current working directory.") #define FUNC_NAME s_scm_getcwd { char *rv; scm_sizet size = 100; char *wd; SCM result; wd = scm_must_malloc (size, FUNC_NAME); while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE) { scm_must_free (wd); size *= 2; wd = scm_must_malloc (size, FUNC_NAME); } if (rv == 0) SCM_SYSERROR; result = scm_makfromstr (wd, strlen (wd), 0); scm_must_free (wd); return result; } #undef FUNC_NAME #endif /* HAVE_GETCWD */ static int set_element (SELECT_TYPE *set, SCM element, int arg) { int fd; element = SCM_COERCE_OUTPORT (element); if (SCM_OPFPORTP (element)) fd = SCM_FPORT_FDES (element); else { SCM_ASSERT (SCM_INUMP (element), element, arg, "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_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_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_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; } } #ifdef HAVE_SELECT /* Static helper functions above refer to s_scm_select directly as s_select */ SCM_DEFINE (scm_select, "select", 3, 2, 0, (SCM reads, SCM writes, SCM excepts, SCM secs, SCM usecs), "@var{reads}, @var{writes} and @var{excepts} can be lists or vectors: it\n" "doesn't matter which, but the corresponding object returned will be\n" "of the same type.\n" "Each element is a port or file descriptor on which to wait for\n" "readability, writeability\n" "or exceptional conditions respectively. @var{secs} and @var{usecs}\n" "optionally specify a timeout: @var{secs} can be specified alone, as\n" "either an integer or a real number, or both @var{secs} and @var{usecs}\n" "can be specified as integers, in which case @var{usecs} is an additional\n" "timeout expressed in microseconds.\n\n" "Buffered input or output data is (currently, but this may change)\n" "ignored: select uses the underlying file descriptor of a port\n" "(@code{char-ready?} will check input buffers, output buffers are\n" "problematic).\n\n" "The return value is a list of subsets of the input lists or vectors for\n" "which the requested condition has been met.\n\n" "It is not quite compatible with scsh's select: scsh checks port buffers,\n" "doesn't accept input lists or a microsecond timeout, returns multiple\n" "values instead of a list and has an additional select! interface.\n" "") #define FUNC_NAME s_scm_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) >= 0 || (SCM_VECTORP (x)), \ x, arg, FUNC_NAME) 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_VALIDATE_INUM (5,usecs); timeout.tv_usec = SCM_INUM (usecs); } } else { double fl = scm_num2dbl (secs, FUNC_NAME); if (!SCM_UNBNDP (usecs)) SCM_WRONG_TYPE_ARG (4, secs); if (fl > LONG_MAX) SCM_OUT_OF_RANGE (4, 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; return scm_listify (retrieve_select_type (&read_set, reads), retrieve_select_type (&write_set, writes), retrieve_select_type (&except_set, excepts), SCM_UNDEFINED); } #undef FUNC_NAME #endif /* HAVE_SELECT */ SCM_DEFINE (scm_fcntl, "fcntl", 2, 0, 1, (SCM object, SCM cmd, SCM value), "Apply @var{command} to the specified file descriptor or the underlying\n" "file descriptor of the specified port. @var{value} is an optional\n" "integer argument.\n\n" "Values for @var{command} are:\n\n" "@table @code\n" "@item F_DUPFD\n" "Duplicate a file descriptor\n" "@item F_GETFD\n" "Get flags associated with the file descriptor.\n" "@item F_SETFD\n" "Set flags associated with the file descriptor to @var{value}.\n" "@item F_GETFL\n" "Get flags associated with the open file.\n" "@item F_SETFL\n" "Set flags associated with the open file to @var{value}\n" "@item F_GETOWN\n" "Get the process ID of a socket's owner, for @code{SIGIO} signals.\n" "@item F_SETOWN\n" "Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n" "@item FD_CLOEXEC\n" "The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or" "@code{F_SETFL}." "@end table") #define FUNC_NAME s_scm_fcntl { int rv; int fdes; int ivalue; object = SCM_COERCE_OUTPORT (object); SCM_VALIDATE_INUM (2,cmd); if (SCM_OPFPORTP (object)) fdes = SCM_FPORT_FDES (object); else { SCM_VALIDATE_INUM (1,object); fdes = SCM_INUM (object); } if (SCM_NULLP (value)) ivalue = 0; else { SCM_ASSERT (SCM_INUMP (SCM_CAR (value)), value, SCM_ARG3, FUNC_NAME); ivalue = SCM_INUM (SCM_CAR (value)); } SCM_SYSCALL (rv = fcntl (fdes, SCM_INUM (cmd), ivalue)); if (rv == -1) SCM_SYSERROR; return SCM_MAKINUM (rv); } #undef FUNC_NAME SCM_DEFINE (scm_fsync, "fsync", 1, 0, 0, (SCM object), "Copies any unwritten data for the specified output file descriptor to disk.\n" "If @var{port/fd} is a port, its buffer is flushed before the underlying\n" "file descriptor is fsync'd.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_fsync { int fdes; object = SCM_COERCE_OUTPORT (object); if (SCM_OPFPORTP (object)) { scm_flush (object); fdes = SCM_FPORT_FDES (object); } else { SCM_VALIDATE_INUM (1,object); fdes = SCM_INUM (object); } if (fsync (fdes) == -1) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #ifdef HAVE_SYMLINK SCM_DEFINE (scm_symlink, "symlink", 2, 0, 0, (SCM oldpath, SCM newpath), "Create a symbolic link named @var{path-to} with the value (i.e., pointing to)\n" "@var{path-from}. The return value is unspecified.") #define FUNC_NAME s_scm_symlink { int val; SCM_VALIDATE_ROSTRING (1,oldpath); SCM_VALIDATE_ROSTRING (2,newpath); SCM_COERCE_SUBSTR (oldpath); SCM_COERCE_SUBSTR (newpath); SCM_SYSCALL (val = symlink(SCM_ROCHARS(oldpath), SCM_ROCHARS(newpath))); if (val != 0) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME #endif /* HAVE_SYMLINK */ #ifdef HAVE_READLINK SCM_DEFINE (scm_readlink, "readlink", 1, 0, 0, (SCM path), "Returns the value of the symbolic link named by\n" "@var{path} (a string), i.e., the\n" "file that the link points to.") #define FUNC_NAME s_scm_readlink { int rv; int size = 100; char *buf; SCM result; SCM_VALIDATE_ROSTRING (1,path); SCM_COERCE_SUBSTR (path); buf = scm_must_malloc (size, FUNC_NAME); while ((rv = readlink (SCM_ROCHARS (path), buf, size)) == size) { scm_must_free (buf); size *= 2; buf = scm_must_malloc (size, FUNC_NAME); } if (rv == -1) SCM_SYSERROR; result = scm_makfromstr (buf, rv, 0); scm_must_free (buf); return result; } #undef FUNC_NAME #endif /* HAVE_READLINK */ #ifdef HAVE_LSTAT SCM_DEFINE (scm_lstat, "lstat", 1, 0, 0, (SCM str), "Similar to @code{stat}, but does not follow symbolic links, i.e.,\n" "it will return information about a symbolic link itself, not the \n" "file it points to. @var{path} must be a string.") #define FUNC_NAME s_scm_lstat { int rv; struct stat stat_temp; SCM_VALIDATE_ROSTRING (1,str); SCM_COERCE_SUBSTR (str); SCM_SYSCALL(rv = lstat(SCM_ROCHARS(str), &stat_temp)); if (rv != 0) { int en = errno; SCM_SYSERROR_MSG ("~A: ~S", scm_listify (scm_makfrom0str (strerror (errno)), str, SCM_UNDEFINED), en); } return scm_stat2scm(&stat_temp); } #undef FUNC_NAME #endif /* HAVE_LSTAT */ SCM_DEFINE (scm_copy_file, "copy-file", 2, 0, 0, (SCM oldfile, SCM newfile), "Copy the file specified by @var{path-from} to @var{path-to}.\n" "The return value is unspecified.") #define FUNC_NAME s_scm_copy_file { int oldfd, newfd; int n; char buf[BUFSIZ]; struct stat oldstat; SCM_VALIDATE_ROSTRING (1,oldfile); if (SCM_SUBSTRP (oldfile)) oldfile = scm_makfromstr (SCM_ROCHARS (oldfile), SCM_ROLENGTH (oldfile), 0); SCM_VALIDATE_ROSTRING (2,newfile); if (SCM_SUBSTRP (newfile)) newfile = scm_makfromstr (SCM_ROCHARS (newfile), SCM_ROLENGTH (newfile), 0); if (stat (SCM_ROCHARS (oldfile), &oldstat) == -1) SCM_SYSERROR; oldfd = open (SCM_ROCHARS (oldfile), O_RDONLY); if (oldfd == -1) SCM_SYSERROR; /* 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; while ((n = read (oldfd, buf, sizeof buf)) > 0) if (write (newfd, buf, n) != n) { close (oldfd); close (newfd); SCM_SYSERROR; } close (oldfd); if (close (newfd) == -1) SCM_SYSERROR; return SCM_UNSPECIFIED; } #undef FUNC_NAME /* Filename manipulation */ SCM scm_dot_string; SCM_DEFINE (scm_dirname, "dirname", 1, 0, 0, (SCM filename), "") #define FUNC_NAME s_scm_dirname { char *s; int i, len; SCM_VALIDATE_ROSTRING (1,filename); 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)); } #undef FUNC_NAME SCM_DEFINE (scm_basename, "basename", 1, 1, 0, (SCM filename, SCM suffix), "") #define FUNC_NAME s_scm_basename { char *f, *s = 0; int i, j, len, end; SCM_VALIDATE_ROSTRING (1,filename); SCM_ASSERT (SCM_UNBNDP (suffix) || (SCM_ROSTRINGP (suffix)), suffix, SCM_ARG2, FUNC_NAME); 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)); } #undef FUNC_NAME void scm_init_filesys () { 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" }