1 /* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
43 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
49 #include "libguile/_scm.h"
50 #include "libguile/smob.h"
51 #include "libguile/feature.h"
52 #include "libguile/fports.h"
53 #include "libguile/iselect.h"
54 #include "libguile/strings.h"
55 #include "libguile/vectors.h"
57 #include "libguile/validate.h"
58 #include "libguile/filesys.h"
65 #ifdef TIME_WITH_SYS_TIME
66 # include <sys/time.h>
70 # include <sys/time.h>
80 #ifdef LIBC_H_WITH_UNISTD_H
84 #ifdef HAVE_SYS_SELECT_H
85 #include <sys/select.h>
92 #include <sys/types.h>
101 # define NAMLEN(dirent) strlen((dirent)->d_name)
103 # define dirent direct
104 # define NAMLEN(dirent) (dirent)->d_namlen
106 # include <sys/ndir.h>
109 # include <sys/dir.h>
116 /* Ultrix has S_IFSOCK, but no S_ISSOCK. Ipe! */
117 #if defined (S_IFSOCK) && ! defined (S_ISSOCK)
118 #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
128 SCM_DEFINE (scm_chown
, "chown", 3, 0, 0,
129 (SCM object
, SCM owner
, SCM group
),
130 "Change the ownership and group of the file referred to by @var{object} to\n"
131 "the integer values @var{owner} and @var{group}. @var{object} can be\n"
132 "a string containing a file name or, if the platform\n"
133 "supports fchown, a port or integer file descriptor\n"
134 "which is open on the file. The return value\n"
135 "is unspecified.\n\n"
136 "If @var{object} is a symbolic link, either the\n"
137 "ownership of the link or the ownership of the referenced file will be\n"
138 "changed depending on the operating system (lchown is\n"
139 "unsupported at present). If @var{owner} or @var{group} is specified\n"
140 "as @code{-1}, then that ID is not changed.")
141 #define FUNC_NAME s_scm_chown
145 object
= SCM_COERCE_OUTPORT (object
);
147 SCM_VALIDATE_INUM (2,owner
);
148 SCM_VALIDATE_INUM (3,group
);
150 if (SCM_INUMP (object
) || (SCM_OPFPORTP (object
)))
152 int fdes
= SCM_INUMP (object
) ? SCM_INUM (object
)
153 : SCM_FPORT_FDES (object
);
155 SCM_SYSCALL (rv
= fchown (fdes
, SCM_INUM (owner
), SCM_INUM (group
)));
160 SCM_VALIDATE_STRING (1, object
);
161 SCM_STRING_COERCE_0TERMINATION_X (object
);
162 SCM_SYSCALL (rv
= chown (SCM_STRING_CHARS (object
),
163 SCM_INUM (owner
), SCM_INUM (group
)));
167 return SCM_UNSPECIFIED
;
172 SCM_DEFINE (scm_chmod
, "chmod", 2, 0, 0,
173 (SCM object
, SCM mode
),
174 "Changes the permissions of the file referred to by @var{obj}.\n"
175 "@var{obj} can be a string containing a file name or a port or integer file\n"
176 "descriptor which is open on a file (in which case @code{fchmod} is used\n"
177 "as the underlying system call).\n"
178 "@var{mode} specifies\n"
179 "the new permissions as a decimal number, e.g., @code{(chmod \"foo\" #o755)}.\n"
180 "The return value is unspecified.")
181 #define FUNC_NAME s_scm_chmod
186 object
= SCM_COERCE_OUTPORT (object
);
188 SCM_VALIDATE_INUM (2,mode
);
189 if (SCM_INUMP (object
) || SCM_OPFPORTP (object
))
191 if (SCM_INUMP (object
))
192 fdes
= SCM_INUM (object
);
194 fdes
= SCM_FPORT_FDES (object
);
195 SCM_SYSCALL (rv
= fchmod (fdes
, SCM_INUM (mode
)));
199 SCM_VALIDATE_STRING (1, object
);
200 SCM_STRING_COERCE_0TERMINATION_X (object
);
201 SCM_SYSCALL (rv
= chmod (SCM_STRING_CHARS (object
), SCM_INUM (mode
)));
205 return SCM_UNSPECIFIED
;
209 SCM_DEFINE (scm_umask
, "umask", 0, 1, 0,
211 "If @var{mode} is omitted, retuns a decimal number representing the current\n"
212 "file creation mask. Otherwise the file creation mask is set to\n"
213 "@var{mode} and the previous value is returned.\n\n"
214 "E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18.")
215 #define FUNC_NAME s_scm_umask
218 if (SCM_UNBNDP (mode
))
225 SCM_VALIDATE_INUM (1,mode
);
226 mask
= umask (SCM_INUM (mode
));
228 return SCM_MAKINUM (mask
);
234 SCM_DEFINE (scm_open_fdes
, "open-fdes", 2, 1, 0,
235 (SCM path
, SCM flags
, SCM mode
),
236 "Similar to @code{open} but returns a file descriptor instead of a\n"
238 #define FUNC_NAME s_scm_open_fdes
244 SCM_VALIDATE_STRING (1, path
);
245 SCM_STRING_COERCE_0TERMINATION_X (path
);
246 iflags
= SCM_NUM2LONG(2,flags
);
247 imode
= SCM_NUM2LONG_DEF(3,mode
,0666);
248 SCM_SYSCALL (fd
= open (SCM_STRING_CHARS (path
), iflags
, imode
));
251 return SCM_MAKINUM (fd
);
255 SCM_DEFINE (scm_open
, "open", 2, 1, 0,
256 (SCM path
, SCM flags
, SCM mode
),
257 "Open the file named by @var{path} for reading and/or writing.\n"
258 "@var{flags} is an integer specifying how the file should be opened.\n"
259 "@var{mode} is an integer specifying the permission bits of the file, if\n"
260 "it needs to be created, before the umask is applied. The default is 666\n"
261 "(Unix itself has no default).\n\n"
262 "@var{flags} can be constructed by combining variables using @code{logior}.\n"
263 "Basic flags are:\n\n"
265 "Open the file read-only.\n"
268 "Open the file write-only. \n"
271 "Open the file read/write.\n"
274 "Append to the file instead of truncating.\n"
277 "Create the file if it does not already exist.\n"
279 "See the Unix documentation of the @code{open} system call\n"
280 "for additional flags.")
281 #define FUNC_NAME s_scm_open
288 fd
= SCM_INUM (scm_open_fdes (path
, flags
, mode
));
289 iflags
= SCM_NUM2LONG (2,flags
);
292 if (iflags
& O_APPEND
)
294 else if (iflags
& O_CREAT
)
300 if (iflags
& O_APPEND
)
302 else if (iflags
& O_WRONLY
)
307 newpt
= scm_fdes_to_port (fd
, port_mode
, path
);
312 SCM_DEFINE (scm_close
, "close", 1, 0, 0,
314 "Similar to close-port (@pxref{Generic Port Operations, close-port}),\n"
315 "but also works on file descriptors. A side\n"
316 "effect of closing a file descriptor is that any ports using that file\n"
317 "descriptor are moved to a different file descriptor and have\n"
318 "their revealed counts set to zero.")
319 #define FUNC_NAME s_scm_close
324 fd_or_port
= SCM_COERCE_OUTPORT (fd_or_port
);
326 if (SCM_PORTP (fd_or_port
))
327 return scm_close_port (fd_or_port
);
328 SCM_VALIDATE_INUM (1,fd_or_port
);
329 fd
= SCM_INUM (fd_or_port
);
330 scm_evict_ports (fd
); /* see scsh manual. */
331 SCM_SYSCALL (rv
= close (fd
));
332 /* following scsh, closing an already closed file descriptor is
334 if (rv
< 0 && errno
!= EBADF
)
336 return SCM_NEGATE_BOOL(rv
< 0);
340 SCM_DEFINE (scm_close_fdes
, "close-fdes", 1, 0, 0,
342 "A simple wrapper for the @code{close} system call.\n"
343 "Close file descriptor @var{fd}, which must be an integer.\n"
344 "Unlike close (@pxref{Ports and File Descriptors, close}),\n"
345 "the file descriptor will be closed even if a port is using it.\n"
346 "The return value is unspecified.")
347 #define FUNC_NAME s_scm_close_fdes
352 SCM_VALIDATE_INUM_COPY (1, fd
, c_fd
);
353 SCM_SYSCALL (rv
= close (c_fd
));
356 return SCM_UNSPECIFIED
;
364 SCM_SYMBOL (scm_sym_regular
, "regular");
365 SCM_SYMBOL (scm_sym_directory
, "directory");
367 SCM_SYMBOL (scm_sym_symlink
, "symlink");
369 SCM_SYMBOL (scm_sym_block_special
, "block-special");
370 SCM_SYMBOL (scm_sym_char_special
, "char-special");
371 SCM_SYMBOL (scm_sym_fifo
, "fifo");
372 SCM_SYMBOL (scm_sym_sock
, "socket");
373 SCM_SYMBOL (scm_sym_unknown
, "unknown");
376 scm_stat2scm (struct stat
*stat_temp
)
378 SCM ans
= scm_c_make_vector (15, SCM_UNSPECIFIED
);
379 SCM
*ve
= SCM_VELTS (ans
);
381 ve
[0] = scm_ulong2num ((unsigned long) stat_temp
->st_dev
);
382 ve
[1] = scm_ulong2num ((unsigned long) stat_temp
->st_ino
);
383 ve
[2] = scm_ulong2num ((unsigned long) stat_temp
->st_mode
);
384 ve
[3] = scm_ulong2num ((unsigned long) stat_temp
->st_nlink
);
385 ve
[4] = scm_ulong2num ((unsigned long) stat_temp
->st_uid
);
386 ve
[5] = scm_ulong2num ((unsigned long) stat_temp
->st_gid
);
388 ve
[6] = scm_ulong2num ((unsigned long) stat_temp
->st_rdev
);
392 ve
[7] = scm_ulong2num ((unsigned long) stat_temp
->st_size
);
393 ve
[8] = scm_ulong2num ((unsigned long) stat_temp
->st_atime
);
394 ve
[9] = scm_ulong2num ((unsigned long) stat_temp
->st_mtime
);
395 ve
[10] = scm_ulong2num ((unsigned long) stat_temp
->st_ctime
);
396 #ifdef HAVE_ST_BLKSIZE
397 ve
[11] = scm_ulong2num ((unsigned long) stat_temp
->st_blksize
);
399 ve
[11] = scm_ulong2num (4096L);
401 #ifdef HAVE_ST_BLOCKS
402 ve
[12] = scm_ulong2num ((unsigned long) stat_temp
->st_blocks
);
407 int mode
= stat_temp
->st_mode
;
410 ve
[13] = scm_sym_regular
;
411 else if (S_ISDIR (mode
))
412 ve
[13] = scm_sym_directory
;
414 else if (S_ISLNK (mode
))
415 ve
[13] = scm_sym_symlink
;
417 else if (S_ISBLK (mode
))
418 ve
[13] = scm_sym_block_special
;
419 else if (S_ISCHR (mode
))
420 ve
[13] = scm_sym_char_special
;
421 else if (S_ISFIFO (mode
))
422 ve
[13] = scm_sym_fifo
;
424 else if (S_ISSOCK (mode
))
425 ve
[13] = scm_sym_sock
;
428 ve
[13] = scm_sym_unknown
;
430 ve
[14] = SCM_MAKINUM ((~S_IFMT
) & mode
);
432 /* the layout of the bits in ve[14] is intended to be portable.
433 If there are systems that don't follow the usual convention,
434 the following could be used:
437 if (S_ISUID & mode) tmp += 1;
439 if (S_IRGRP & mode) tmp += 1;
441 if (S_ISVTX & mode) tmp += 1;
443 if (S_IRUSR & mode) tmp += 1;
445 if (S_IWUSR & mode) tmp += 1;
447 if (S_IXUSR & mode) tmp += 1;
449 if (S_IWGRP & mode) tmp += 1;
451 if (S_IXGRP & mode) tmp += 1;
453 if (S_IROTH & mode) tmp += 1;
455 if (S_IWOTH & mode) tmp += 1;
457 if (S_IXOTH & mode) tmp += 1;
459 ve[14] = SCM_MAKINUM (tmp);
467 SCM_DEFINE (scm_stat
, "stat", 1, 0, 0,
469 "Returns an object containing various information\n"
470 "about the file determined by @var{obj}.\n"
471 "@var{obj} can be a string containing a file name or a port or integer file\n"
472 "descriptor which is open on a file (in which case @code{fstat} is used\n"
473 "as the underlying system call).\n\n"
474 "The object returned by @code{stat} can be passed as a single parameter\n"
475 "to the following procedures, all of which return integers:\n\n"
478 "The device containing the file.\n"
480 "The file serial number, which distinguishes this file from all other\n"
481 "files on the same device.\n"
483 "The mode of the file. This includes file type information\n"
484 "and the file permission bits. See @code{stat:type} and @code{stat:perms}\n"
487 "The number of hard links to the file.\n"
489 "The user ID of the file's owner.\n"
491 "The group ID of the file.\n"
493 "Device ID; this entry is defined only for character or block\n"
496 "The size of a regular file in bytes.\n"
498 "The last access time for the file.\n"
500 "The last modification time for the file.\n"
502 "The last modification time for the attributes of the file.\n"
503 "@item stat:blksize\n"
504 "The optimal block size for reading or writing the file, in bytes.\n"
505 "@item stat:blocks\n"
506 "The amount of disk space that the file occupies measured in units of\n"
509 "In addition, the following procedures return the information\n"
510 "from stat:mode in a more convenient form:\n\n"
513 "A symbol representing the type of file. Possible values are\n"
514 "regular, directory, symlink, block-special, char-special,\n"
515 "fifo, socket and unknown\n"
517 "An integer representing the access permission bits.\n"
519 #define FUNC_NAME s_scm_stat
523 struct stat stat_temp
;
525 if (SCM_INUMP (object
))
526 SCM_SYSCALL (rv
= fstat (SCM_INUM (object
), &stat_temp
));
529 SCM_VALIDATE_NIM (1,object
);
530 if (SCM_STRINGP (object
))
532 SCM_STRING_COERCE_0TERMINATION_X (object
);
533 SCM_SYSCALL (rv
= stat (SCM_STRING_CHARS (object
), &stat_temp
));
537 object
= SCM_COERCE_OUTPORT (object
);
538 SCM_VALIDATE_OPFPORT(1,object
);
539 fdes
= SCM_FPORT_FDES (object
);
540 SCM_SYSCALL (rv
= fstat (fdes
, &stat_temp
));
547 SCM_SYSERROR_MSG ("~A: ~S",
548 SCM_LIST2 (scm_makfrom0str (strerror (errno
)), object
),
551 return scm_stat2scm (&stat_temp
);
556 /* {Modifying Directories}
559 SCM_DEFINE (scm_link
, "link", 2, 0, 0,
560 (SCM oldpath
, SCM newpath
),
561 "Creates a new name @var{newpath} in the file system for the\n"
562 "file named by @var{oldpath}. If @var{oldpath} is a symbolic\n"
563 "link, the link may or may not be followed depending on the\n"
565 #define FUNC_NAME s_scm_link
569 SCM_VALIDATE_STRING (1, oldpath
);
570 SCM_STRING_COERCE_0TERMINATION_X (oldpath
);
571 SCM_VALIDATE_STRING (2, newpath
);
572 SCM_STRING_COERCE_0TERMINATION_X (newpath
);
573 SCM_SYSCALL (val
= link (SCM_STRING_CHARS (oldpath
),
574 SCM_STRING_CHARS (newpath
)));
577 return SCM_UNSPECIFIED
;
583 SCM_DEFINE (scm_rename
, "rename-file", 2, 0, 0,
584 (SCM oldname
, SCM newname
),
585 "Renames the file specified by @var{oldname} to @var{newname}.\n"
586 "The return value is unspecified.")
587 #define FUNC_NAME s_scm_rename
590 SCM_VALIDATE_STRING (1, oldname
);
591 SCM_VALIDATE_STRING (2, newname
);
592 SCM_STRING_COERCE_0TERMINATION_X (oldname
);
593 SCM_STRING_COERCE_0TERMINATION_X (newname
);
595 SCM_SYSCALL (rv
= rename (SCM_STRING_CHARS (oldname
), SCM_STRING_CHARS (newname
)));
597 SCM_SYSCALL (rv
= link (SCM_STRING_CHARS (oldname
), SCM_STRING_CHARS (newname
)));
600 SCM_SYSCALL (rv
= unlink (SCM_STRING_CHARS (oldname
)));;
602 /* unlink failed. remove new name */
603 SCM_SYSCALL (unlink (SCM_STRING_CHARS (newname
)));
608 return SCM_UNSPECIFIED
;
613 SCM_DEFINE (scm_delete_file
, "delete-file", 1, 0, 0,
615 "Deletes (or \"unlinks\") the file specified by @var{path}.")
616 #define FUNC_NAME s_scm_delete_file
619 SCM_VALIDATE_STRING (1, str
);
620 SCM_STRING_COERCE_0TERMINATION_X (str
);
621 SCM_SYSCALL (ans
= unlink (SCM_STRING_CHARS (str
)));
624 return SCM_UNSPECIFIED
;
629 SCM_DEFINE (scm_mkdir
, "mkdir", 1, 1, 0,
630 (SCM path
, SCM mode
),
631 "Create a new directory named by @var{path}. If @var{mode} is omitted\n"
632 "then the permissions of the directory file are set using the current\n"
633 "umask. Otherwise they are set to the decimal value specified with\n"
634 "@var{mode}. The return value is unspecified.")
635 #define FUNC_NAME s_scm_mkdir
639 SCM_VALIDATE_STRING (1, path
);
640 SCM_STRING_COERCE_0TERMINATION_X (path
);
641 if (SCM_UNBNDP (mode
))
645 SCM_SYSCALL (rv
= mkdir (SCM_STRING_CHARS (path
), 0777 ^ mask
));
649 SCM_VALIDATE_INUM (2,mode
);
650 SCM_SYSCALL (rv
= mkdir (SCM_STRING_CHARS (path
), SCM_INUM (mode
)));
654 return SCM_UNSPECIFIED
;
657 #endif /* HAVE_MKDIR */
660 SCM_DEFINE (scm_rmdir
, "rmdir", 1, 0, 0,
662 "Remove the existing directory named by @var{path}. The directory must\n"
663 "be empty for this to succeed. The return value is unspecified.")
664 #define FUNC_NAME s_scm_rmdir
668 SCM_VALIDATE_STRING (1, path
);
669 SCM_STRING_COERCE_0TERMINATION_X (path
);
670 SCM_SYSCALL (val
= rmdir (SCM_STRING_CHARS (path
)));
673 return SCM_UNSPECIFIED
;
680 /* {Examining Directories}
683 scm_bits_t scm_tc16_dir
;
686 SCM_DEFINE (scm_directory_stream_p
, "directory-stream?", 1, 0, 0,
688 "Returns a boolean indicating whether @var{object} is a directory stream\n"
689 "as returned by @code{opendir}.")
690 #define FUNC_NAME s_scm_directory_stream_p
692 return SCM_BOOL (SCM_DIRP (obj
));
697 SCM_DEFINE (scm_opendir
, "opendir", 1, 0, 0,
699 "Open the directory specified by @var{path} and return a directory\n"
701 #define FUNC_NAME s_scm_opendir
704 SCM_VALIDATE_STRING (1, dirname
);
705 SCM_STRING_COERCE_0TERMINATION_X (dirname
);
706 SCM_SYSCALL (ds
= opendir (SCM_STRING_CHARS (dirname
)));
709 SCM_RETURN_NEWSMOB (scm_tc16_dir
| SCM_DIR_FLAG_OPEN
, ds
);
714 SCM_DEFINE (scm_readdir
, "readdir", 1, 0, 0,
716 "Return (as a string) the next directory entry from the directory stream\n"
717 "@var{stream}. If there is no remaining entry to be read then the\n"
718 "end of file object is returned.")
719 #define FUNC_NAME s_scm_readdir
721 struct dirent
*rdent
;
723 SCM_VALIDATE_DIR (1, port
);
724 if (!SCM_DIR_OPEN_P (port
))
725 SCM_MISC_ERROR ("Directory ~S is not open.", SCM_LIST1 (port
));
728 SCM_SYSCALL (rdent
= readdir ((DIR *) SCM_CELL_WORD_1 (port
)));
732 return (rdent
? scm_makfromstr (rdent
->d_name
, NAMLEN (rdent
), 0)
738 SCM_DEFINE (scm_rewinddir
, "rewinddir", 1, 0, 0,
740 "Reset the directory port @var{stream} so that the next call to\n"
741 "@code{readdir} will return the first directory entry.")
742 #define FUNC_NAME s_scm_rewinddir
744 SCM_VALIDATE_DIR (1, port
);
745 if (!SCM_DIR_OPEN_P (port
))
746 SCM_MISC_ERROR ("Directory ~S is not open.", SCM_LIST1 (port
));
748 rewinddir ((DIR *) SCM_CELL_WORD_1 (port
));
750 return SCM_UNSPECIFIED
;
755 SCM_DEFINE (scm_closedir
, "closedir", 1, 0, 0,
757 "Close the directory stream @var{stream}.\n"
758 "The return value is unspecified.")
759 #define FUNC_NAME s_scm_closedir
761 SCM_VALIDATE_DIR (1, port
);
763 if (SCM_DIR_OPEN_P (port
))
767 SCM_SYSCALL (sts
= closedir ((DIR *) SCM_CELL_WORD_1 (port
)));
771 SCM_SET_CELL_WORD_0 (port
, scm_tc16_dir
);
774 return SCM_UNSPECIFIED
;
780 scm_dir_print (SCM exp
, SCM port
, scm_print_state
*pstate
)
782 scm_puts ("#<", port
);
783 if (!SCM_DIR_OPEN_P (exp
))
784 scm_puts ("closed: ", port
);
785 scm_puts ("directory stream ", port
);
786 scm_intprint (SCM_CELL_WORD_1 (exp
), 16, port
);
787 scm_putc ('>', port
);
795 if (SCM_DIR_OPEN_P (p
))
796 closedir ((DIR *) SCM_CELL_WORD_1 (p
));
801 /* {Navigating Directories}
805 SCM_DEFINE (scm_chdir
, "chdir", 1, 0, 0,
807 "Change the current working directory to @var{path}.\n"
808 "The return value is unspecified.")
809 #define FUNC_NAME s_scm_chdir
813 SCM_VALIDATE_STRING (1, str
);
814 SCM_STRING_COERCE_0TERMINATION_X (str
);
815 SCM_SYSCALL (ans
= chdir (SCM_STRING_CHARS (str
)));
818 return SCM_UNSPECIFIED
;
823 SCM_DEFINE (scm_getcwd
, "getcwd", 0, 0, 0,
825 "Returns the name of the current working directory.")
826 #define FUNC_NAME s_scm_getcwd
829 scm_sizet size
= 100;
833 wd
= scm_must_malloc (size
, FUNC_NAME
);
834 while ((rv
= getcwd (wd
, size
)) == 0 && errno
== ERANGE
)
838 wd
= scm_must_malloc (size
, FUNC_NAME
);
842 result
= scm_makfromstr (wd
, strlen (wd
), 0);
847 #endif /* HAVE_GETCWD */
853 /* check that element is a port or file descriptor. if it's a port
854 and its buffer is ready for use, add it to the ports_ready list.
855 otherwise add its file descriptor to *set. the type of list can be
856 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
857 SCM_ARG3 for excepts. */
859 set_element (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM element
, int pos
)
863 if (SCM_INUMP (element
))
865 fd
= SCM_INUM (element
);
871 element
= SCM_COERCE_OUTPORT (element
);
872 SCM_ASSERT (SCM_OPFPORTP (element
), element
, pos
, "select");
875 /* check whether port has buffered input. */
876 scm_port
*pt
= SCM_PTAB_ENTRY (element
);
878 if (pt
->read_pos
< pt
->read_end
)
881 else if (pos
== SCM_ARG2
)
883 /* check whether port's output buffer has room. */
884 scm_port
*pt
= SCM_PTAB_ENTRY (element
);
886 /* > 1 since writing the last byte in the buffer causes flush. */
887 if (pt
->write_end
- pt
->write_pos
> 1)
890 fd
= use_buf
? -1 : SCM_FPORT_FDES (element
);
893 *ports_ready
= scm_cons (element
, *ports_ready
);
899 /* check list_or_vec, a list or vector of ports or file descriptors,
900 adding each member to either the ports_ready list (if it's a port
901 with a usable buffer) or to *set. the kind of list_or_vec can be
902 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
903 SCM_ARG3 for excepts. */
905 fill_select_type (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM list_or_vec
, int pos
)
909 if (SCM_VECTORP (list_or_vec
))
911 int i
= SCM_VECTOR_LENGTH (list_or_vec
);
912 SCM
*ve
= SCM_VELTS (list_or_vec
);
916 int fd
= set_element (set
, ports_ready
, ve
[i
], pos
);
924 while (!SCM_NULLP (list_or_vec
))
926 int fd
= set_element (set
, ports_ready
, SCM_CAR (list_or_vec
), pos
);
930 list_or_vec
= SCM_CDR (list_or_vec
);
937 /* if element (a file descriptor or port) appears in *set, cons it to
938 list. return list. */
940 get_element (SELECT_TYPE
*set
, SCM element
, SCM list
)
944 if (SCM_INUMP (element
))
946 fd
= SCM_INUM (element
);
950 fd
= SCM_FPORT_FDES (SCM_COERCE_OUTPORT (element
));
952 if (FD_ISSET (fd
, set
))
953 list
= scm_cons (element
, list
);
957 /* construct component of scm_select return value.
958 set: pointer to set of file descriptors found by select to be ready
959 ports_ready: ports ready due to buffering
960 list_or_vec: original list/vector handed to scm_select.
961 the return value is a list/vector of ready ports/file descriptors.
962 works by finding the objects in list which correspond to members of
963 *set and appending them to ports_ready. result is converted to a
964 vector if list_or_vec is a vector. */
966 retrieve_select_type (SELECT_TYPE
*set
, SCM ports_ready
, SCM list_or_vec
)
968 SCM answer_list
= ports_ready
;
970 if (SCM_VECTORP (list_or_vec
))
972 int i
= SCM_VECTOR_LENGTH (list_or_vec
);
973 SCM
*ve
= SCM_VELTS (list_or_vec
);
977 answer_list
= get_element (set
, ve
[i
], answer_list
);
979 return scm_vector (answer_list
);
983 /* list_or_vec must be a list. */
984 while (!SCM_NULLP (list_or_vec
))
986 answer_list
= get_element (set
, SCM_CAR (list_or_vec
), answer_list
);
987 list_or_vec
= SCM_CDR (list_or_vec
);
993 /* Static helper functions above refer to s_scm_select directly as s_select */
994 SCM_DEFINE (scm_select
, "select", 3, 2, 0,
995 (SCM reads
, SCM writes
, SCM excepts
, SCM secs
, SCM usecs
),
996 "This procedure has a variety of uses: waiting for the ability\n"
997 "to provide input, accept output, or the existance of\n"
998 "exceptional conditions on a collection of ports or file\n"
999 "descriptors, or waiting for a timeout to occur.\n"
1000 "It also returns if interrupted by a signal.\n\n"
1001 "@var{reads}, @var{writes} and @var{excepts} can be lists or\n"
1002 "vectors, with each member a port or a file descriptor.\n"
1003 "The value returned is a list of three corresponding\n"
1004 "lists or vectors containing only the members which meet the\n"
1005 "specified requirement. The ability of port buffers to\n"
1006 "provide input or accept output is taken into account.\n"
1007 "Ordering of the input lists or vectors is not preserved.\n\n"
1008 "The optional arguments @var{secs} and @var{usecs} specify the\n"
1009 "timeout. Either @var{secs} can be specified alone, as\n"
1010 "either an integer or a real number, or both @var{secs} and\n"
1011 "@var{usecs} can be specified as integers, in which case\n"
1012 "@var{usecs} is an additional timeout expressed in\n"
1013 "microseconds. If @var{secs} is omitted or is @code{#f} then\n"
1014 "select will wait for as long as it takes for one of the other\n"
1015 "conditions to be satisfied.\n\n"
1016 "The scsh version of @code{select} differs as follows:\n"
1017 "Only vectors are accepted for the first three arguments.\n"
1018 "The @var{usecs} argument is not supported.\n"
1019 "Multiple values are returned instead of a list.\n"
1020 "Duplicates in the input vectors appear only once in output.\n"
1021 "An additional @code{select!} interface is provided.\n"
1023 #define FUNC_NAME s_scm_select
1025 struct timeval timeout
;
1026 struct timeval
* time_ptr
;
1027 SELECT_TYPE read_set
;
1028 SELECT_TYPE write_set
;
1029 SELECT_TYPE except_set
;
1033 /* these lists accumulate ports which are ready due to buffering.
1034 their file descriptors don't need to be added to the select sets. */
1035 SCM read_ports_ready
= SCM_EOL
;
1036 SCM write_ports_ready
= SCM_EOL
;
1039 if (SCM_VECTORP (reads
))
1041 read_count
= SCM_VECTOR_LENGTH (reads
);
1045 read_count
= scm_ilength (reads
);
1046 SCM_ASSERT (read_count
>= 0, reads
, SCM_ARG1
, FUNC_NAME
);
1048 if (SCM_VECTORP (writes
))
1050 write_count
= SCM_VECTOR_LENGTH (writes
);
1054 write_count
= scm_ilength (writes
);
1055 SCM_ASSERT (write_count
>= 0, writes
, SCM_ARG2
, FUNC_NAME
);
1057 if (SCM_VECTORP (excepts
))
1059 except_count
= SCM_VECTOR_LENGTH (excepts
);
1063 except_count
= scm_ilength (excepts
);
1064 SCM_ASSERT (except_count
>= 0, excepts
, SCM_ARG3
, FUNC_NAME
);
1067 FD_ZERO (&read_set
);
1068 FD_ZERO (&write_set
);
1069 FD_ZERO (&except_set
);
1071 max_fd
= fill_select_type (&read_set
, &read_ports_ready
, reads
, SCM_ARG1
);
1074 int write_max
= fill_select_type (&write_set
, &write_ports_ready
,
1076 int except_max
= fill_select_type (&except_set
, NULL
,
1079 if (write_max
> max_fd
)
1081 if (except_max
> max_fd
)
1082 max_fd
= except_max
;
1085 /* if there's a port with a ready buffer, don't block, just
1086 check for ready file descriptors. */
1087 if (!SCM_NULLP (read_ports_ready
) || !SCM_NULLP (write_ports_ready
))
1090 timeout
.tv_usec
= 0;
1091 time_ptr
= &timeout
;
1093 else if (SCM_UNBNDP (secs
) || SCM_FALSEP (secs
))
1097 if (SCM_INUMP (secs
))
1099 timeout
.tv_sec
= SCM_INUM (secs
);
1100 if (SCM_UNBNDP (usecs
))
1101 timeout
.tv_usec
= 0;
1104 SCM_VALIDATE_INUM (5,usecs
);
1105 timeout
.tv_usec
= SCM_INUM (usecs
);
1110 double fl
= scm_num2dbl (secs
, FUNC_NAME
);
1112 if (!SCM_UNBNDP (usecs
))
1113 SCM_WRONG_TYPE_ARG (4, secs
);
1115 SCM_OUT_OF_RANGE (4, secs
);
1116 timeout
.tv_sec
= (long) fl
;
1117 timeout
.tv_usec
= (long) ((fl
- timeout
.tv_sec
) * 1000000);
1119 time_ptr
= &timeout
;
1123 #ifdef GUILE_ISELECT
1124 int rv
= scm_internal_select (max_fd
+ 1,
1125 &read_set
, &write_set
, &except_set
,
1128 int rv
= select (max_fd
+ 1,
1129 &read_set
, &write_set
, &except_set
, time_ptr
);
1134 return SCM_LIST3 (retrieve_select_type (&read_set
, read_ports_ready
, reads
),
1135 retrieve_select_type (&write_set
, write_ports_ready
, writes
),
1136 retrieve_select_type (&except_set
, SCM_EOL
, excepts
));
1139 #endif /* HAVE_SELECT */
1143 SCM_DEFINE (scm_fcntl
, "fcntl", 2, 1, 0,
1144 (SCM object
, SCM cmd
, SCM value
),
1145 "Apply @var{command} to the specified file descriptor or the underlying\n"
1146 "file descriptor of the specified port. @var{value} is an optional\n"
1147 "integer argument.\n\n"
1148 "Values for @var{command} are:\n\n"
1151 "Duplicate a file descriptor\n"
1153 "Get flags associated with the file descriptor.\n"
1155 "Set flags associated with the file descriptor to @var{value}.\n"
1157 "Get flags associated with the open file.\n"
1159 "Set flags associated with the open file to @var{value}\n"
1161 "Get the process ID of a socket's owner, for @code{SIGIO} signals.\n"
1163 "Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n"
1164 "@item FD_CLOEXEC\n"
1165 "The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or\n"
1168 #define FUNC_NAME s_scm_fcntl
1174 object
= SCM_COERCE_OUTPORT (object
);
1176 SCM_VALIDATE_INUM (2,cmd
);
1177 if (SCM_OPFPORTP (object
))
1178 fdes
= SCM_FPORT_FDES (object
);
1181 SCM_VALIDATE_INUM (1,object
);
1182 fdes
= SCM_INUM (object
);
1185 if (SCM_UNBNDP (value
)) {
1188 SCM_VALIDATE_INUM_COPY (SCM_ARG3
, value
, ivalue
);
1191 SCM_SYSCALL (rv
= fcntl (fdes
, SCM_INUM (cmd
), ivalue
));
1194 return SCM_MAKINUM (rv
);
1198 SCM_DEFINE (scm_fsync
, "fsync", 1, 0, 0,
1200 "Copies any unwritten data for the specified output file descriptor to disk.\n"
1201 "If @var{port/fd} is a port, its buffer is flushed before the underlying\n"
1202 "file descriptor is fsync'd.\n"
1203 "The return value is unspecified.")
1204 #define FUNC_NAME s_scm_fsync
1208 object
= SCM_COERCE_OUTPORT (object
);
1210 if (SCM_OPFPORTP (object
))
1213 fdes
= SCM_FPORT_FDES (object
);
1217 SCM_VALIDATE_INUM (1,object
);
1218 fdes
= SCM_INUM (object
);
1220 if (fsync (fdes
) == -1)
1222 return SCM_UNSPECIFIED
;
1227 SCM_DEFINE (scm_symlink
, "symlink", 2, 0, 0,
1228 (SCM oldpath
, SCM newpath
),
1229 "Create a symbolic link named @var{path-to} with the value (i.e., pointing to)\n"
1230 "@var{path-from}. The return value is unspecified.")
1231 #define FUNC_NAME s_scm_symlink
1235 SCM_VALIDATE_STRING (1, oldpath
);
1236 SCM_VALIDATE_STRING (2, newpath
);
1237 SCM_STRING_COERCE_0TERMINATION_X (oldpath
);
1238 SCM_STRING_COERCE_0TERMINATION_X (newpath
);
1239 SCM_SYSCALL (val
= symlink (SCM_STRING_CHARS (oldpath
), SCM_STRING_CHARS (newpath
)));
1242 return SCM_UNSPECIFIED
;
1245 #endif /* HAVE_SYMLINK */
1247 #ifdef HAVE_READLINK
1248 SCM_DEFINE (scm_readlink
, "readlink", 1, 0, 0,
1250 "Returns the value of the symbolic link named by\n"
1251 "@var{path} (a string), i.e., the\n"
1252 "file that the link points to.")
1253 #define FUNC_NAME s_scm_readlink
1259 SCM_VALIDATE_STRING (1, path
);
1260 SCM_STRING_COERCE_0TERMINATION_X (path
);
1261 buf
= scm_must_malloc (size
, FUNC_NAME
);
1262 while ((rv
= readlink (SCM_STRING_CHARS (path
), buf
, size
)) == size
)
1264 scm_must_free (buf
);
1266 buf
= scm_must_malloc (size
, FUNC_NAME
);
1270 result
= scm_makfromstr (buf
, rv
, 0);
1271 scm_must_free (buf
);
1275 #endif /* HAVE_READLINK */
1278 SCM_DEFINE (scm_lstat
, "lstat", 1, 0, 0,
1280 "Similar to @code{stat}, but does not follow symbolic links, i.e.,\n"
1281 "it will return information about a symbolic link itself, not the \n"
1282 "file it points to. @var{path} must be a string.")
1283 #define FUNC_NAME s_scm_lstat
1286 struct stat stat_temp
;
1288 SCM_VALIDATE_STRING (1, str
);
1289 SCM_STRING_COERCE_0TERMINATION_X (str
);
1290 SCM_SYSCALL (rv
= lstat (SCM_STRING_CHARS (str
), &stat_temp
));
1295 SCM_SYSERROR_MSG ("~A: ~S",
1296 SCM_LIST2 (scm_makfrom0str (strerror (errno
)), str
),
1299 return scm_stat2scm(&stat_temp
);
1302 #endif /* HAVE_LSTAT */
1304 SCM_DEFINE (scm_copy_file
, "copy-file", 2, 0, 0,
1305 (SCM oldfile
, SCM newfile
),
1306 "Copy the file specified by @var{path-from} to @var{path-to}.\n"
1307 "The return value is unspecified.")
1308 #define FUNC_NAME s_scm_copy_file
1313 struct stat oldstat
;
1315 SCM_VALIDATE_STRING (1, oldfile
);
1316 SCM_STRING_COERCE_0TERMINATION_X (oldfile
);
1317 SCM_VALIDATE_STRING (2, newfile
);
1318 SCM_STRING_COERCE_0TERMINATION_X (newfile
);
1319 if (stat (SCM_STRING_CHARS (oldfile
), &oldstat
) == -1)
1321 oldfd
= open (SCM_STRING_CHARS (oldfile
), O_RDONLY
);
1325 /* use POSIX flags instead of 07777?. */
1326 newfd
= open (SCM_STRING_CHARS (newfile
), O_WRONLY
| O_CREAT
| O_TRUNC
,
1327 oldstat
.st_mode
& 07777);
1331 while ((n
= read (oldfd
, buf
, sizeof buf
)) > 0)
1332 if (write (newfd
, buf
, n
) != n
)
1339 if (close (newfd
) == -1)
1341 return SCM_UNSPECIFIED
;
1346 /* Filename manipulation */
1350 SCM_DEFINE (scm_dirname
, "dirname", 1, 0, 0,
1352 "Return the directory name component of the file name\n"
1353 "@var{filename}. If @var{filename} does not contain a directory\n"
1354 "component, @code{.} is returned.")
1355 #define FUNC_NAME s_scm_dirname
1359 unsigned long int len
;
1361 SCM_VALIDATE_STRING (1,filename
);
1363 s
= SCM_STRING_CHARS (filename
);
1364 len
= SCM_STRING_LENGTH (filename
);
1367 while (i
>= 0 && s
[i
] == '/') --i
;
1368 while (i
>= 0 && s
[i
] != '/') --i
;
1369 while (i
>= 0 && s
[i
] == '/') --i
;
1372 if (len
> 0 && s
[0] == '/')
1373 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (1));
1375 return scm_dot_string
;
1378 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (i
+ 1));
1382 SCM_DEFINE (scm_basename
, "basename", 1, 1, 0,
1383 (SCM filename
, SCM suffix
),
1384 "Return the base name of the file name @var{filename}. The\n"
1385 "base name is the file name without any directory components.\n"
1386 "If @var{suffix} is privided, and is equal to the end of\n"
1387 "@var{basename}, it is removed also.")
1388 #define FUNC_NAME s_scm_basename
1393 SCM_VALIDATE_STRING (1,filename
);
1394 f
= SCM_STRING_CHARS (filename
);
1395 len
= SCM_STRING_LENGTH (filename
);
1397 if (SCM_UNBNDP (suffix
))
1401 SCM_VALIDATE_STRING (2, suffix
);
1402 s
= SCM_STRING_CHARS (suffix
);
1403 j
= SCM_STRING_LENGTH (suffix
) - 1;
1406 while (i
>= 0 && f
[i
] == '/') --i
;
1408 while (i
>= 0 && j
>= 0 && f
[i
] == s
[j
]) --i
, --j
;
1411 while (i
>= 0 && f
[i
] != '/') --i
;
1414 if (len
> 0 && f
[0] == '/')
1415 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (1));
1417 return scm_dot_string
;
1420 return scm_substring (filename
, SCM_MAKINUM (i
+ 1), SCM_MAKINUM (end
+ 1));
1431 scm_tc16_dir
= scm_make_smob_type ("directory", 0);
1432 scm_set_smob_free (scm_tc16_dir
, scm_dir_free
);
1433 scm_set_smob_print (scm_tc16_dir
, scm_dir_print
);
1435 scm_dot_string
= scm_permanent_object (scm_makfrom0str ("."));
1438 scm_sysintern ("O_RDONLY", scm_long2num (O_RDONLY
));
1441 scm_sysintern ("O_WRONLY", scm_long2num (O_WRONLY
));
1444 scm_sysintern ("O_RDWR", scm_long2num (O_RDWR
));
1447 scm_sysintern ("O_CREAT", scm_long2num (O_CREAT
));
1450 scm_sysintern ("O_EXCL", scm_long2num (O_EXCL
));
1453 scm_sysintern ("O_NOCTTY", scm_long2num (O_NOCTTY
));
1456 scm_sysintern ("O_TRUNC", scm_long2num (O_TRUNC
));
1459 scm_sysintern ("O_APPEND", scm_long2num (O_APPEND
));
1462 scm_sysintern ("O_NONBLOCK", scm_long2num (O_NONBLOCK
));
1465 scm_sysintern ("O_NDELAY", scm_long2num (O_NDELAY
));
1468 scm_sysintern ("O_SYNC", scm_long2num (O_SYNC
));
1472 scm_sysintern ("F_DUPFD", scm_long2num (F_DUPFD
));
1475 scm_sysintern ("F_GETFD", scm_long2num (F_GETFD
));
1478 scm_sysintern ("F_SETFD", scm_long2num (F_SETFD
));
1481 scm_sysintern ("F_GETFL", scm_long2num (F_GETFL
));
1484 scm_sysintern ("F_SETFL", scm_long2num (F_SETFL
));
1487 scm_sysintern ("F_GETOWN", scm_long2num (F_GETOWN
));
1490 scm_sysintern ("F_SETOWN", scm_long2num (F_SETOWN
));
1493 scm_sysintern ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC
));
1496 #ifndef SCM_MAGIC_SNARFER
1497 #include "libguile/filesys.x"