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 return a file descriptor instead of\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_NUM2INT (2, flags
);
247 imode
= SCM_NUM2INT_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_NUM2INT (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_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
);
387 #ifdef HAVE_STRUCT_STAT_ST_RDEV
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_STRUCT_STAT_ST_BLKSIZE
397 ve
[11] = scm_ulong2num ((unsigned long) stat_temp
->st_blksize
);
399 ve
[11] = scm_ulong2num (4096L);
401 #ifdef HAVE_STRUCT_STAT_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 "Return an object containing various information about the file\n"
470 "determined by @var{obj}. @var{obj} can be a string containing\n"
471 "a file name or a port or integer file descriptor which is open\n"
472 "on a file (in which case @code{fstat} is used as the underlying\n"
475 "The object returned by @code{stat} can be passed as a single\n"
476 "parameter to the following procedures, all of which return\n"
481 "The device containing the file.\n"
483 "The file serial number, which distinguishes this file from all\n"
484 "other files on the same device.\n"
486 "The mode of the file. This includes file type information and\n"
487 "the file permission bits. See @code{stat:type} and\n"
488 "@code{stat:perms} below.\n"
490 "The number of hard links to the file.\n"
492 "The user ID of the file's owner.\n"
494 "The group ID of the file.\n"
496 "Device ID; this entry is defined only for character or block\n"
499 "The size of a regular file in bytes.\n"
501 "The last access time for the file.\n"
503 "The last modification time for the file.\n"
505 "The last modification time for the attributes of the file.\n"
506 "@item stat:blksize\n"
507 "The optimal block size for reading or writing the file, in\n"
509 "@item stat:blocks\n"
510 "The amount of disk space that the file occupies measured in\n"
511 "units of 512 byte blocks.\n"
514 "In addition, the following procedures return the information\n"
515 "from stat:mode in a more convenient form:\n"
519 "A symbol representing the type of file. Possible values are\n"
520 "regular, directory, symlink, block-special, char-special, fifo,\n"
521 "socket and unknown\n"
523 "An integer representing the access permission bits.\n"
525 #define FUNC_NAME s_scm_stat
529 struct stat stat_temp
;
531 if (SCM_INUMP (object
))
533 SCM_SYSCALL (rv
= fstat (SCM_INUM (object
), &stat_temp
));
535 else if (SCM_STRINGP (object
))
537 SCM_STRING_COERCE_0TERMINATION_X (object
);
538 SCM_SYSCALL (rv
= stat (SCM_STRING_CHARS (object
), &stat_temp
));
542 object
= SCM_COERCE_OUTPORT (object
);
543 SCM_VALIDATE_OPFPORT (1, object
);
544 fdes
= SCM_FPORT_FDES (object
);
545 SCM_SYSCALL (rv
= fstat (fdes
, &stat_temp
));
552 SCM_SYSERROR_MSG ("~A: ~S",
553 SCM_LIST2 (scm_makfrom0str (strerror (errno
)), object
),
556 return scm_stat2scm (&stat_temp
);
561 /* {Modifying Directories}
564 SCM_DEFINE (scm_link
, "link", 2, 0, 0,
565 (SCM oldpath
, SCM newpath
),
566 "Creates a new name @var{newpath} in the file system for the\n"
567 "file named by @var{oldpath}. If @var{oldpath} is a symbolic\n"
568 "link, the link may or may not be followed depending on the\n"
570 #define FUNC_NAME s_scm_link
574 SCM_VALIDATE_STRING (1, oldpath
);
575 SCM_STRING_COERCE_0TERMINATION_X (oldpath
);
576 SCM_VALIDATE_STRING (2, newpath
);
577 SCM_STRING_COERCE_0TERMINATION_X (newpath
);
578 SCM_SYSCALL (val
= link (SCM_STRING_CHARS (oldpath
),
579 SCM_STRING_CHARS (newpath
)));
582 return SCM_UNSPECIFIED
;
588 SCM_DEFINE (scm_rename
, "rename-file", 2, 0, 0,
589 (SCM oldname
, SCM newname
),
590 "Renames the file specified by @var{oldname} to @var{newname}.\n"
591 "The return value is unspecified.")
592 #define FUNC_NAME s_scm_rename
595 SCM_VALIDATE_STRING (1, oldname
);
596 SCM_VALIDATE_STRING (2, newname
);
597 SCM_STRING_COERCE_0TERMINATION_X (oldname
);
598 SCM_STRING_COERCE_0TERMINATION_X (newname
);
600 SCM_SYSCALL (rv
= rename (SCM_STRING_CHARS (oldname
), SCM_STRING_CHARS (newname
)));
602 SCM_SYSCALL (rv
= link (SCM_STRING_CHARS (oldname
), SCM_STRING_CHARS (newname
)));
605 SCM_SYSCALL (rv
= unlink (SCM_STRING_CHARS (oldname
)));;
607 /* unlink failed. remove new name */
608 SCM_SYSCALL (unlink (SCM_STRING_CHARS (newname
)));
613 return SCM_UNSPECIFIED
;
618 SCM_DEFINE (scm_delete_file
, "delete-file", 1, 0, 0,
620 "Deletes (or \"unlinks\") the file specified by @var{path}.")
621 #define FUNC_NAME s_scm_delete_file
624 SCM_VALIDATE_STRING (1, str
);
625 SCM_STRING_COERCE_0TERMINATION_X (str
);
626 SCM_SYSCALL (ans
= unlink (SCM_STRING_CHARS (str
)));
629 return SCM_UNSPECIFIED
;
634 SCM_DEFINE (scm_mkdir
, "mkdir", 1, 1, 0,
635 (SCM path
, SCM mode
),
636 "Create a new directory named by @var{path}. If @var{mode} is omitted\n"
637 "then the permissions of the directory file are set using the current\n"
638 "umask. Otherwise they are set to the decimal value specified with\n"
639 "@var{mode}. The return value is unspecified.")
640 #define FUNC_NAME s_scm_mkdir
644 SCM_VALIDATE_STRING (1, path
);
645 SCM_STRING_COERCE_0TERMINATION_X (path
);
646 if (SCM_UNBNDP (mode
))
650 SCM_SYSCALL (rv
= mkdir (SCM_STRING_CHARS (path
), 0777 ^ mask
));
654 SCM_VALIDATE_INUM (2,mode
);
655 SCM_SYSCALL (rv
= mkdir (SCM_STRING_CHARS (path
), SCM_INUM (mode
)));
659 return SCM_UNSPECIFIED
;
662 #endif /* HAVE_MKDIR */
665 SCM_DEFINE (scm_rmdir
, "rmdir", 1, 0, 0,
667 "Remove the existing directory named by @var{path}. The directory must\n"
668 "be empty for this to succeed. The return value is unspecified.")
669 #define FUNC_NAME s_scm_rmdir
673 SCM_VALIDATE_STRING (1, path
);
674 SCM_STRING_COERCE_0TERMINATION_X (path
);
675 SCM_SYSCALL (val
= rmdir (SCM_STRING_CHARS (path
)));
678 return SCM_UNSPECIFIED
;
685 /* {Examining Directories}
688 scm_t_bits scm_tc16_dir
;
691 SCM_DEFINE (scm_directory_stream_p
, "directory-stream?", 1, 0, 0,
693 "Return a boolean indicating whether @var{object} is a directory\n"
694 "stream as returned by @code{opendir}.")
695 #define FUNC_NAME s_scm_directory_stream_p
697 return SCM_BOOL (SCM_DIRP (obj
));
702 SCM_DEFINE (scm_opendir
, "opendir", 1, 0, 0,
704 "Open the directory specified by @var{path} and return a directory\n"
706 #define FUNC_NAME s_scm_opendir
709 SCM_VALIDATE_STRING (1, dirname
);
710 SCM_STRING_COERCE_0TERMINATION_X (dirname
);
711 SCM_SYSCALL (ds
= opendir (SCM_STRING_CHARS (dirname
)));
714 SCM_RETURN_NEWSMOB (scm_tc16_dir
| SCM_DIR_FLAG_OPEN
, ds
);
719 SCM_DEFINE (scm_readdir
, "readdir", 1, 0, 0,
721 "Return (as a string) the next directory entry from the directory stream\n"
722 "@var{stream}. If there is no remaining entry to be read then the\n"
723 "end of file object is returned.")
724 #define FUNC_NAME s_scm_readdir
726 struct dirent
*rdent
;
728 SCM_VALIDATE_DIR (1, port
);
729 if (!SCM_DIR_OPEN_P (port
))
730 SCM_MISC_ERROR ("Directory ~S is not open.", SCM_LIST1 (port
));
733 SCM_SYSCALL (rdent
= readdir ((DIR *) SCM_CELL_WORD_1 (port
)));
737 return (rdent
? scm_mem2string (rdent
->d_name
, NAMLEN (rdent
))
743 SCM_DEFINE (scm_rewinddir
, "rewinddir", 1, 0, 0,
745 "Reset the directory port @var{stream} so that the next call to\n"
746 "@code{readdir} will return the first directory entry.")
747 #define FUNC_NAME s_scm_rewinddir
749 SCM_VALIDATE_DIR (1, port
);
750 if (!SCM_DIR_OPEN_P (port
))
751 SCM_MISC_ERROR ("Directory ~S is not open.", SCM_LIST1 (port
));
753 rewinddir ((DIR *) SCM_CELL_WORD_1 (port
));
755 return SCM_UNSPECIFIED
;
760 SCM_DEFINE (scm_closedir
, "closedir", 1, 0, 0,
762 "Close the directory stream @var{stream}.\n"
763 "The return value is unspecified.")
764 #define FUNC_NAME s_scm_closedir
766 SCM_VALIDATE_DIR (1, port
);
768 if (SCM_DIR_OPEN_P (port
))
772 SCM_SYSCALL (sts
= closedir ((DIR *) SCM_CELL_WORD_1 (port
)));
776 SCM_SET_CELL_WORD_0 (port
, scm_tc16_dir
);
779 return SCM_UNSPECIFIED
;
785 scm_dir_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
787 scm_puts ("#<", port
);
788 if (!SCM_DIR_OPEN_P (exp
))
789 scm_puts ("closed: ", port
);
790 scm_puts ("directory stream ", port
);
791 scm_intprint (SCM_CELL_WORD_1 (exp
), 16, port
);
792 scm_putc ('>', port
);
800 if (SCM_DIR_OPEN_P (p
))
801 closedir ((DIR *) SCM_CELL_WORD_1 (p
));
806 /* {Navigating Directories}
810 SCM_DEFINE (scm_chdir
, "chdir", 1, 0, 0,
812 "Change the current working directory to @var{path}.\n"
813 "The return value is unspecified.")
814 #define FUNC_NAME s_scm_chdir
818 SCM_VALIDATE_STRING (1, str
);
819 SCM_STRING_COERCE_0TERMINATION_X (str
);
820 SCM_SYSCALL (ans
= chdir (SCM_STRING_CHARS (str
)));
823 return SCM_UNSPECIFIED
;
828 SCM_DEFINE (scm_getcwd
, "getcwd", 0, 0, 0,
830 "Return the name of the current working directory.")
831 #define FUNC_NAME s_scm_getcwd
838 wd
= scm_must_malloc (size
, FUNC_NAME
);
839 while ((rv
= getcwd (wd
, size
)) == 0 && errno
== ERANGE
)
843 wd
= scm_must_malloc (size
, FUNC_NAME
);
847 result
= scm_mem2string (wd
, strlen (wd
));
852 #endif /* HAVE_GETCWD */
858 /* check that element is a port or file descriptor. if it's a port
859 and its buffer is ready for use, add it to the ports_ready list.
860 otherwise add its file descriptor to *set. the type of list can be
861 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
862 SCM_ARG3 for excepts. */
864 set_element (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM element
, int pos
)
868 if (SCM_INUMP (element
))
870 fd
= SCM_INUM (element
);
876 element
= SCM_COERCE_OUTPORT (element
);
877 SCM_ASSERT (SCM_OPFPORTP (element
), element
, pos
, "select");
880 /* check whether port has buffered input. */
881 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
883 if (pt
->read_pos
< pt
->read_end
)
886 else if (pos
== SCM_ARG2
)
888 /* check whether port's output buffer has room. */
889 scm_t_port
*pt
= SCM_PTAB_ENTRY (element
);
891 /* > 1 since writing the last byte in the buffer causes flush. */
892 if (pt
->write_end
- pt
->write_pos
> 1)
895 fd
= use_buf
? -1 : SCM_FPORT_FDES (element
);
898 *ports_ready
= scm_cons (element
, *ports_ready
);
904 /* check list_or_vec, a list or vector of ports or file descriptors,
905 adding each member to either the ports_ready list (if it's a port
906 with a usable buffer) or to *set. the kind of list_or_vec can be
907 determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
908 SCM_ARG3 for excepts. */
910 fill_select_type (SELECT_TYPE
*set
, SCM
*ports_ready
, SCM list_or_vec
, int pos
)
914 if (SCM_VECTORP (list_or_vec
))
916 int i
= SCM_VECTOR_LENGTH (list_or_vec
);
917 SCM
*ve
= SCM_VELTS (list_or_vec
);
921 int fd
= set_element (set
, ports_ready
, ve
[i
], pos
);
929 while (!SCM_NULLP (list_or_vec
))
931 int fd
= set_element (set
, ports_ready
, SCM_CAR (list_or_vec
), pos
);
935 list_or_vec
= SCM_CDR (list_or_vec
);
942 /* if element (a file descriptor or port) appears in *set, cons it to
943 list. return list. */
945 get_element (SELECT_TYPE
*set
, SCM element
, SCM list
)
949 if (SCM_INUMP (element
))
951 fd
= SCM_INUM (element
);
955 fd
= SCM_FPORT_FDES (SCM_COERCE_OUTPORT (element
));
957 if (FD_ISSET (fd
, set
))
958 list
= scm_cons (element
, list
);
962 /* construct component of scm_select return value.
963 set: pointer to set of file descriptors found by select to be ready
964 ports_ready: ports ready due to buffering
965 list_or_vec: original list/vector handed to scm_select.
966 the return value is a list/vector of ready ports/file descriptors.
967 works by finding the objects in list which correspond to members of
968 *set and appending them to ports_ready. result is converted to a
969 vector if list_or_vec is a vector. */
971 retrieve_select_type (SELECT_TYPE
*set
, SCM ports_ready
, SCM list_or_vec
)
973 SCM answer_list
= ports_ready
;
975 if (SCM_VECTORP (list_or_vec
))
977 int i
= SCM_VECTOR_LENGTH (list_or_vec
);
978 SCM
*ve
= SCM_VELTS (list_or_vec
);
982 answer_list
= get_element (set
, ve
[i
], answer_list
);
984 return scm_vector (answer_list
);
988 /* list_or_vec must be a list. */
989 while (!SCM_NULLP (list_or_vec
))
991 answer_list
= get_element (set
, SCM_CAR (list_or_vec
), answer_list
);
992 list_or_vec
= SCM_CDR (list_or_vec
);
998 /* Static helper functions above refer to s_scm_select directly as s_select */
999 SCM_DEFINE (scm_select
, "select", 3, 2, 0,
1000 (SCM reads
, SCM writes
, SCM excepts
, SCM secs
, SCM usecs
),
1001 "This procedure has a variety of uses: waiting for the ability\n"
1002 "to provide input, accept output, or the existance of\n"
1003 "exceptional conditions on a collection of ports or file\n"
1004 "descriptors, or waiting for a timeout to occur.\n"
1005 "It also returns if interrupted by a signal.\n\n"
1006 "@var{reads}, @var{writes} and @var{excepts} can be lists or\n"
1007 "vectors, with each member a port or a file descriptor.\n"
1008 "The value returned is a list of three corresponding\n"
1009 "lists or vectors containing only the members which meet the\n"
1010 "specified requirement. The ability of port buffers to\n"
1011 "provide input or accept output is taken into account.\n"
1012 "Ordering of the input lists or vectors is not preserved.\n\n"
1013 "The optional arguments @var{secs} and @var{usecs} specify the\n"
1014 "timeout. Either @var{secs} can be specified alone, as\n"
1015 "either an integer or a real number, or both @var{secs} and\n"
1016 "@var{usecs} can be specified as integers, in which case\n"
1017 "@var{usecs} is an additional timeout expressed in\n"
1018 "microseconds. If @var{secs} is omitted or is @code{#f} then\n"
1019 "select will wait for as long as it takes for one of the other\n"
1020 "conditions to be satisfied.\n\n"
1021 "The scsh version of @code{select} differs as follows:\n"
1022 "Only vectors are accepted for the first three arguments.\n"
1023 "The @var{usecs} argument is not supported.\n"
1024 "Multiple values are returned instead of a list.\n"
1025 "Duplicates in the input vectors appear only once in output.\n"
1026 "An additional @code{select!} interface is provided.\n"
1028 #define FUNC_NAME s_scm_select
1030 struct timeval timeout
;
1031 struct timeval
* time_ptr
;
1032 SELECT_TYPE read_set
;
1033 SELECT_TYPE write_set
;
1034 SELECT_TYPE except_set
;
1038 /* these lists accumulate ports which are ready due to buffering.
1039 their file descriptors don't need to be added to the select sets. */
1040 SCM read_ports_ready
= SCM_EOL
;
1041 SCM write_ports_ready
= SCM_EOL
;
1044 if (SCM_VECTORP (reads
))
1046 read_count
= SCM_VECTOR_LENGTH (reads
);
1050 read_count
= scm_ilength (reads
);
1051 SCM_ASSERT (read_count
>= 0, reads
, SCM_ARG1
, FUNC_NAME
);
1053 if (SCM_VECTORP (writes
))
1055 write_count
= SCM_VECTOR_LENGTH (writes
);
1059 write_count
= scm_ilength (writes
);
1060 SCM_ASSERT (write_count
>= 0, writes
, SCM_ARG2
, FUNC_NAME
);
1062 if (SCM_VECTORP (excepts
))
1064 except_count
= SCM_VECTOR_LENGTH (excepts
);
1068 except_count
= scm_ilength (excepts
);
1069 SCM_ASSERT (except_count
>= 0, excepts
, SCM_ARG3
, FUNC_NAME
);
1072 FD_ZERO (&read_set
);
1073 FD_ZERO (&write_set
);
1074 FD_ZERO (&except_set
);
1076 max_fd
= fill_select_type (&read_set
, &read_ports_ready
, reads
, SCM_ARG1
);
1079 int write_max
= fill_select_type (&write_set
, &write_ports_ready
,
1081 int except_max
= fill_select_type (&except_set
, NULL
,
1084 if (write_max
> max_fd
)
1086 if (except_max
> max_fd
)
1087 max_fd
= except_max
;
1090 /* if there's a port with a ready buffer, don't block, just
1091 check for ready file descriptors. */
1092 if (!SCM_NULLP (read_ports_ready
) || !SCM_NULLP (write_ports_ready
))
1095 timeout
.tv_usec
= 0;
1096 time_ptr
= &timeout
;
1098 else if (SCM_UNBNDP (secs
) || SCM_FALSEP (secs
))
1102 if (SCM_INUMP (secs
))
1104 timeout
.tv_sec
= SCM_INUM (secs
);
1105 if (SCM_UNBNDP (usecs
))
1106 timeout
.tv_usec
= 0;
1109 SCM_VALIDATE_INUM (5,usecs
);
1110 timeout
.tv_usec
= SCM_INUM (usecs
);
1115 double fl
= scm_num2dbl (secs
, FUNC_NAME
);
1117 if (!SCM_UNBNDP (usecs
))
1118 SCM_WRONG_TYPE_ARG (4, secs
);
1120 SCM_OUT_OF_RANGE (4, secs
);
1121 timeout
.tv_sec
= (long) fl
;
1122 timeout
.tv_usec
= (long) ((fl
- timeout
.tv_sec
) * 1000000);
1124 time_ptr
= &timeout
;
1128 #ifdef GUILE_ISELECT
1129 int rv
= scm_internal_select (max_fd
+ 1,
1130 &read_set
, &write_set
, &except_set
,
1133 int rv
= select (max_fd
+ 1,
1134 &read_set
, &write_set
, &except_set
, time_ptr
);
1139 return SCM_LIST3 (retrieve_select_type (&read_set
, read_ports_ready
, reads
),
1140 retrieve_select_type (&write_set
, write_ports_ready
, writes
),
1141 retrieve_select_type (&except_set
, SCM_EOL
, excepts
));
1144 #endif /* HAVE_SELECT */
1148 SCM_DEFINE (scm_fcntl
, "fcntl", 2, 1, 0,
1149 (SCM object
, SCM cmd
, SCM value
),
1150 "Apply @var{command} to the specified file descriptor or the underlying\n"
1151 "file descriptor of the specified port. @var{value} is an optional\n"
1152 "integer argument.\n\n"
1153 "Values for @var{command} are:\n\n"
1156 "Duplicate a file descriptor\n"
1158 "Get flags associated with the file descriptor.\n"
1160 "Set flags associated with the file descriptor to @var{value}.\n"
1162 "Get flags associated with the open file.\n"
1164 "Set flags associated with the open file to @var{value}\n"
1166 "Get the process ID of a socket's owner, for @code{SIGIO} signals.\n"
1168 "Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n"
1169 "@item FD_CLOEXEC\n"
1170 "The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or\n"
1173 #define FUNC_NAME s_scm_fcntl
1179 object
= SCM_COERCE_OUTPORT (object
);
1181 SCM_VALIDATE_INUM (2,cmd
);
1182 if (SCM_OPFPORTP (object
))
1183 fdes
= SCM_FPORT_FDES (object
);
1186 SCM_VALIDATE_INUM (1,object
);
1187 fdes
= SCM_INUM (object
);
1190 if (SCM_UNBNDP (value
)) {
1193 SCM_VALIDATE_INUM_COPY (SCM_ARG3
, value
, ivalue
);
1196 SCM_SYSCALL (rv
= fcntl (fdes
, SCM_INUM (cmd
), ivalue
));
1199 return SCM_MAKINUM (rv
);
1203 SCM_DEFINE (scm_fsync
, "fsync", 1, 0, 0,
1205 "Copies any unwritten data for the specified output file descriptor to disk.\n"
1206 "If @var{port/fd} is a port, its buffer is flushed before the underlying\n"
1207 "file descriptor is fsync'd.\n"
1208 "The return value is unspecified.")
1209 #define FUNC_NAME s_scm_fsync
1213 object
= SCM_COERCE_OUTPORT (object
);
1215 if (SCM_OPFPORTP (object
))
1218 fdes
= SCM_FPORT_FDES (object
);
1222 SCM_VALIDATE_INUM (1,object
);
1223 fdes
= SCM_INUM (object
);
1225 if (fsync (fdes
) == -1)
1227 return SCM_UNSPECIFIED
;
1232 SCM_DEFINE (scm_symlink
, "symlink", 2, 0, 0,
1233 (SCM oldpath
, SCM newpath
),
1234 "Create a symbolic link named @var{path-to} with the value (i.e., pointing to)\n"
1235 "@var{path-from}. The return value is unspecified.")
1236 #define FUNC_NAME s_scm_symlink
1240 SCM_VALIDATE_STRING (1, oldpath
);
1241 SCM_VALIDATE_STRING (2, newpath
);
1242 SCM_STRING_COERCE_0TERMINATION_X (oldpath
);
1243 SCM_STRING_COERCE_0TERMINATION_X (newpath
);
1244 SCM_SYSCALL (val
= symlink (SCM_STRING_CHARS (oldpath
), SCM_STRING_CHARS (newpath
)));
1247 return SCM_UNSPECIFIED
;
1250 #endif /* HAVE_SYMLINK */
1252 #ifdef HAVE_READLINK
1253 SCM_DEFINE (scm_readlink
, "readlink", 1, 0, 0,
1255 "Return the value of the symbolic link named by @var{path} (a\n"
1256 "string), i.e., the file that the link points to.")
1257 #define FUNC_NAME s_scm_readlink
1263 SCM_VALIDATE_STRING (1, path
);
1264 SCM_STRING_COERCE_0TERMINATION_X (path
);
1265 buf
= scm_must_malloc (size
, FUNC_NAME
);
1266 while ((rv
= readlink (SCM_STRING_CHARS (path
), buf
, size
)) == size
)
1268 scm_must_free (buf
);
1270 buf
= scm_must_malloc (size
, FUNC_NAME
);
1274 result
= scm_mem2string (buf
, rv
);
1275 scm_must_free (buf
);
1279 #endif /* HAVE_READLINK */
1282 SCM_DEFINE (scm_lstat
, "lstat", 1, 0, 0,
1284 "Similar to @code{stat}, but does not follow symbolic links, i.e.,\n"
1285 "it will return information about a symbolic link itself, not the \n"
1286 "file it points to. @var{path} must be a string.")
1287 #define FUNC_NAME s_scm_lstat
1290 struct stat stat_temp
;
1292 SCM_VALIDATE_STRING (1, str
);
1293 SCM_STRING_COERCE_0TERMINATION_X (str
);
1294 SCM_SYSCALL (rv
= lstat (SCM_STRING_CHARS (str
), &stat_temp
));
1299 SCM_SYSERROR_MSG ("~A: ~S",
1300 SCM_LIST2 (scm_makfrom0str (strerror (errno
)), str
),
1303 return scm_stat2scm(&stat_temp
);
1306 #endif /* HAVE_LSTAT */
1308 SCM_DEFINE (scm_copy_file
, "copy-file", 2, 0, 0,
1309 (SCM oldfile
, SCM newfile
),
1310 "Copy the file specified by @var{path-from} to @var{path-to}.\n"
1311 "The return value is unspecified.")
1312 #define FUNC_NAME s_scm_copy_file
1317 struct stat oldstat
;
1319 SCM_VALIDATE_STRING (1, oldfile
);
1320 SCM_STRING_COERCE_0TERMINATION_X (oldfile
);
1321 SCM_VALIDATE_STRING (2, newfile
);
1322 SCM_STRING_COERCE_0TERMINATION_X (newfile
);
1323 if (stat (SCM_STRING_CHARS (oldfile
), &oldstat
) == -1)
1325 oldfd
= open (SCM_STRING_CHARS (oldfile
), O_RDONLY
);
1329 /* use POSIX flags instead of 07777?. */
1330 newfd
= open (SCM_STRING_CHARS (newfile
), O_WRONLY
| O_CREAT
| O_TRUNC
,
1331 oldstat
.st_mode
& 07777);
1335 while ((n
= read (oldfd
, buf
, sizeof buf
)) > 0)
1336 if (write (newfd
, buf
, n
) != n
)
1343 if (close (newfd
) == -1)
1345 return SCM_UNSPECIFIED
;
1350 /* Filename manipulation */
1354 SCM_DEFINE (scm_dirname
, "dirname", 1, 0, 0,
1356 "Return the directory name component of the file name\n"
1357 "@var{filename}. If @var{filename} does not contain a directory\n"
1358 "component, @code{.} is returned.")
1359 #define FUNC_NAME s_scm_dirname
1363 unsigned long int len
;
1365 SCM_VALIDATE_STRING (1,filename
);
1367 s
= SCM_STRING_CHARS (filename
);
1368 len
= SCM_STRING_LENGTH (filename
);
1371 while (i
>= 0 && s
[i
] == '/') --i
;
1372 while (i
>= 0 && s
[i
] != '/') --i
;
1373 while (i
>= 0 && s
[i
] == '/') --i
;
1376 if (len
> 0 && s
[0] == '/')
1377 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (1));
1379 return scm_dot_string
;
1382 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (i
+ 1));
1386 SCM_DEFINE (scm_basename
, "basename", 1, 1, 0,
1387 (SCM filename
, SCM suffix
),
1388 "Return the base name of the file name @var{filename}. The\n"
1389 "base name is the file name without any directory components.\n"
1390 "If @var{suffix} is privided, and is equal to the end of\n"
1391 "@var{basename}, it is removed also.")
1392 #define FUNC_NAME s_scm_basename
1397 SCM_VALIDATE_STRING (1,filename
);
1398 f
= SCM_STRING_CHARS (filename
);
1399 len
= SCM_STRING_LENGTH (filename
);
1401 if (SCM_UNBNDP (suffix
))
1405 SCM_VALIDATE_STRING (2, suffix
);
1406 s
= SCM_STRING_CHARS (suffix
);
1407 j
= SCM_STRING_LENGTH (suffix
) - 1;
1410 while (i
>= 0 && f
[i
] == '/') --i
;
1412 while (i
>= 0 && j
>= 0 && f
[i
] == s
[j
]) --i
, --j
;
1415 while (i
>= 0 && f
[i
] != '/') --i
;
1418 if (len
> 0 && f
[0] == '/')
1419 return scm_substring (filename
, SCM_INUM0
, SCM_MAKINUM (1));
1421 return scm_dot_string
;
1424 return scm_substring (filename
, SCM_MAKINUM (i
+ 1), SCM_MAKINUM (end
+ 1));
1435 scm_tc16_dir
= scm_make_smob_type ("directory", 0);
1436 scm_set_smob_free (scm_tc16_dir
, scm_dir_free
);
1437 scm_set_smob_print (scm_tc16_dir
, scm_dir_print
);
1439 scm_dot_string
= scm_permanent_object (scm_makfrom0str ("."));
1442 scm_c_define ("O_RDONLY", scm_long2num (O_RDONLY
));
1445 scm_c_define ("O_WRONLY", scm_long2num (O_WRONLY
));
1448 scm_c_define ("O_RDWR", scm_long2num (O_RDWR
));
1451 scm_c_define ("O_CREAT", scm_long2num (O_CREAT
));
1454 scm_c_define ("O_EXCL", scm_long2num (O_EXCL
));
1457 scm_c_define ("O_NOCTTY", scm_long2num (O_NOCTTY
));
1460 scm_c_define ("O_TRUNC", scm_long2num (O_TRUNC
));
1463 scm_c_define ("O_APPEND", scm_long2num (O_APPEND
));
1466 scm_c_define ("O_NONBLOCK", scm_long2num (O_NONBLOCK
));
1469 scm_c_define ("O_NDELAY", scm_long2num (O_NDELAY
));
1472 scm_c_define ("O_SYNC", scm_long2num (O_SYNC
));
1476 scm_c_define ("F_DUPFD", scm_long2num (F_DUPFD
));
1479 scm_c_define ("F_GETFD", scm_long2num (F_GETFD
));
1482 scm_c_define ("F_SETFD", scm_long2num (F_SETFD
));
1485 scm_c_define ("F_GETFL", scm_long2num (F_GETFL
));
1488 scm_c_define ("F_SETFL", scm_long2num (F_SETFL
));
1491 scm_c_define ("F_GETOWN", scm_long2num (F_GETOWN
));
1494 scm_c_define ("F_SETOWN", scm_long2num (F_SETOWN
));
1497 scm_c_define ("FD_CLOEXEC", scm_long2num (FD_CLOEXEC
));
1500 #ifndef SCM_MAGIC_SNARFER
1501 #include "libguile/filesys.x"