1 /* File IO for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
29 #include <sys/types.h>
36 #if !defined (S_ISLNK) && defined (S_IFLNK)
37 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
40 #if !defined (S_ISFIFO) && defined (S_IFIFO)
41 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
44 #if !defined (S_ISREG) && defined (S_IFREG)
45 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
74 #include "intervals.h"
85 #endif /* not WINDOWSNT */
89 #include <sys/param.h>
97 #define CORRECT_DIR_SEPS(s) \
98 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
99 else unixtodos_filename (s); \
101 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
102 redirector allows the six letters between 'Z' and 'a' as well. */
104 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
107 #define IS_DRIVE(x) isalpha (x)
109 /* Need to lower-case the drive letter, or else expanded
110 filenames will sometimes compare inequal, because
111 `expand-file-name' doesn't always down-case the drive letter. */
112 #define DRIVE_LETTER(x) (tolower (x))
133 #include "commands.h"
134 extern int use_dialog_box
;
135 extern int use_file_dialog
;
149 #ifndef FILE_SYSTEM_CASE
150 #define FILE_SYSTEM_CASE(filename) (filename)
153 /* Nonzero during writing of auto-save files */
156 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
157 a new file with the same mode as the original */
158 int auto_save_mode_bits
;
160 /* The symbol bound to coding-system-for-read when
161 insert-file-contents is called for recovering a file. This is not
162 an actual coding system name, but just an indicator to tell
163 insert-file-contents to use `emacs-mule' with a special flag for
164 auto saving and recovering a file. */
165 Lisp_Object Qauto_save_coding
;
167 /* Coding system for file names, or nil if none. */
168 Lisp_Object Vfile_name_coding_system
;
170 /* Coding system for file names used only when
171 Vfile_name_coding_system is nil. */
172 Lisp_Object Vdefault_file_name_coding_system
;
174 /* Alist of elements (REGEXP . HANDLER) for file names
175 whose I/O is done with a special handler. */
176 Lisp_Object Vfile_name_handler_alist
;
178 /* Lisp functions for translating file formats */
179 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
181 /* Function to be called to decide a coding system of a reading file. */
182 Lisp_Object Vset_auto_coding_function
;
184 /* Functions to be called to process text properties in inserted file. */
185 Lisp_Object Vafter_insert_file_functions
;
187 /* Lisp function for setting buffer-file-coding-system and the
188 multibyteness of the current buffer after inserting a file. */
189 Lisp_Object Qafter_insert_file_set_coding
;
191 /* Functions to be called to create text property annotations for file. */
192 Lisp_Object Vwrite_region_annotate_functions
;
193 Lisp_Object Qwrite_region_annotate_functions
;
195 /* During build_annotations, each time an annotation function is called,
196 this holds the annotations made by the previous functions. */
197 Lisp_Object Vwrite_region_annotations_so_far
;
199 /* File name in which we write a list of all our auto save files. */
200 Lisp_Object Vauto_save_list_file_name
;
202 /* Function to call to read a file name. */
203 Lisp_Object Vread_file_name_function
;
205 /* Current predicate used by read_file_name_internal. */
206 Lisp_Object Vread_file_name_predicate
;
208 /* Nonzero means completion ignores case when reading file name. */
209 int read_file_name_completion_ignore_case
;
211 /* Nonzero means, when reading a filename in the minibuffer,
212 start out by inserting the default directory into the minibuffer. */
213 int insert_default_directory
;
215 /* On VMS, nonzero means write new files with record format stmlf.
216 Zero means use var format. */
219 /* On NT, specifies the directory separator character, used (eg.) when
220 expanding file names. This can be bound to / or \. */
221 Lisp_Object Vdirectory_sep_char
;
223 extern Lisp_Object Vuser_login_name
;
226 extern Lisp_Object Vw32_get_true_file_attributes
;
229 extern int minibuf_level
;
231 extern int minibuffer_auto_raise
;
233 extern int history_delete_duplicates
;
235 /* These variables describe handlers that have "already" had a chance
236 to handle the current operation.
238 Vinhibit_file_name_handlers is a list of file name handlers.
239 Vinhibit_file_name_operation is the operation being handled.
240 If we try to handle that operation, we ignore those handlers. */
242 static Lisp_Object Vinhibit_file_name_handlers
;
243 static Lisp_Object Vinhibit_file_name_operation
;
245 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
247 Lisp_Object Qfile_name_history
;
249 Lisp_Object Qcar_less_than_car
;
251 static int a_write
P_ ((int, Lisp_Object
, int, int,
252 Lisp_Object
*, struct coding_system
*));
253 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
257 report_file_error (string
, data
)
261 Lisp_Object errstring
;
264 synchronize_system_messages_locale ();
265 errstring
= code_convert_string_norecord (build_string (strerror (errorno
)),
266 Vlocale_coding_system
, 0);
272 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
275 /* System error messages are capitalized. Downcase the initial
276 unless it is followed by a slash. */
277 if (SREF (errstring
, 1) != '/')
278 SSET (errstring
, 0, DOWNCASE (SREF (errstring
, 0)));
280 Fsignal (Qfile_error
,
281 Fcons (build_string (string
), Fcons (errstring
, data
)));
286 close_file_unwind (fd
)
289 emacs_close (XFASTINT (fd
));
293 /* Restore point, having saved it as a marker. */
296 restore_point_unwind (location
)
297 Lisp_Object location
;
299 Fgoto_char (location
);
300 Fset_marker (location
, Qnil
, Qnil
);
304 Lisp_Object Qexpand_file_name
;
305 Lisp_Object Qsubstitute_in_file_name
;
306 Lisp_Object Qdirectory_file_name
;
307 Lisp_Object Qfile_name_directory
;
308 Lisp_Object Qfile_name_nondirectory
;
309 Lisp_Object Qunhandled_file_name_directory
;
310 Lisp_Object Qfile_name_as_directory
;
311 Lisp_Object Qcopy_file
;
312 Lisp_Object Qmake_directory_internal
;
313 Lisp_Object Qmake_directory
;
314 Lisp_Object Qdelete_directory
;
315 Lisp_Object Qdelete_file
;
316 Lisp_Object Qrename_file
;
317 Lisp_Object Qadd_name_to_file
;
318 Lisp_Object Qmake_symbolic_link
;
319 Lisp_Object Qfile_exists_p
;
320 Lisp_Object Qfile_executable_p
;
321 Lisp_Object Qfile_readable_p
;
322 Lisp_Object Qfile_writable_p
;
323 Lisp_Object Qfile_symlink_p
;
324 Lisp_Object Qaccess_file
;
325 Lisp_Object Qfile_directory_p
;
326 Lisp_Object Qfile_regular_p
;
327 Lisp_Object Qfile_accessible_directory_p
;
328 Lisp_Object Qfile_modes
;
329 Lisp_Object Qset_file_modes
;
330 Lisp_Object Qset_file_times
;
331 Lisp_Object Qfile_newer_than_file_p
;
332 Lisp_Object Qinsert_file_contents
;
333 Lisp_Object Qwrite_region
;
334 Lisp_Object Qverify_visited_file_modtime
;
335 Lisp_Object Qset_visited_file_modtime
;
337 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
338 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
339 Otherwise, return nil.
340 A file name is handled if one of the regular expressions in
341 `file-name-handler-alist' matches it.
343 If OPERATION equals `inhibit-file-name-operation', then we ignore
344 any handlers that are members of `inhibit-file-name-handlers',
345 but we still do run any other handlers. This lets handlers
346 use the standard functions without calling themselves recursively. */)
347 (filename
, operation
)
348 Lisp_Object filename
, operation
;
350 /* This function must not munge the match data. */
351 Lisp_Object chain
, inhibited_handlers
, result
;
355 CHECK_STRING (filename
);
357 if (EQ (operation
, Vinhibit_file_name_operation
))
358 inhibited_handlers
= Vinhibit_file_name_handlers
;
360 inhibited_handlers
= Qnil
;
362 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
363 chain
= XCDR (chain
))
373 && (match_pos
= fast_string_match (string
, filename
)) > pos
)
375 Lisp_Object handler
, tem
;
377 handler
= XCDR (elt
);
378 tem
= Fmemq (handler
, inhibited_handlers
);
392 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
394 doc
: /* Return the directory component in file name FILENAME.
395 Return nil if FILENAME does not include a directory.
396 Otherwise return a directory spec.
397 Given a Unix syntax file name, returns a string ending in slash;
398 on VMS, perhaps instead a string ending in `:', `]' or `>'. */)
400 Lisp_Object filename
;
403 register const unsigned char *beg
;
405 register unsigned char *beg
;
407 register const unsigned char *p
;
410 CHECK_STRING (filename
);
412 /* If the file name has special constructs in it,
413 call the corresponding file handler. */
414 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
416 return call2 (handler
, Qfile_name_directory
, filename
);
418 filename
= FILE_SYSTEM_CASE (filename
);
419 beg
= SDATA (filename
);
421 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
423 p
= beg
+ SBYTES (filename
);
425 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
427 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
430 /* only recognise drive specifier at the beginning */
432 /* handle the "/:d:foo" and "/:foo" cases correctly */
433 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
434 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
441 /* Expansion of "c:" to drive and default directory. */
444 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
445 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
446 unsigned char *r
= res
;
448 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
450 strncpy (res
, beg
, 2);
455 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
457 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
460 p
= beg
+ strlen (beg
);
463 CORRECT_DIR_SEPS (beg
);
466 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
469 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
470 Sfile_name_nondirectory
, 1, 1, 0,
471 doc
: /* Return file name FILENAME sans its directory.
472 For example, in a Unix-syntax file name,
473 this is everything after the last slash,
474 or the entire name if it contains no slash. */)
476 Lisp_Object filename
;
478 register const unsigned char *beg
, *p
, *end
;
481 CHECK_STRING (filename
);
483 /* If the file name has special constructs in it,
484 call the corresponding file handler. */
485 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
487 return call2 (handler
, Qfile_name_nondirectory
, filename
);
489 beg
= SDATA (filename
);
490 end
= p
= beg
+ SBYTES (filename
);
492 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
494 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
497 /* only recognise drive specifier at beginning */
499 /* handle the "/:d:foo" case correctly */
500 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
505 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
508 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
509 Sunhandled_file_name_directory
, 1, 1, 0,
510 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
511 A `directly usable' directory name is one that may be used without the
512 intervention of any file handler.
513 If FILENAME is a directly usable file itself, return
514 \(file-name-directory FILENAME).
515 The `call-process' and `start-process' functions use this function to
516 get a current directory to run processes in. */)
518 Lisp_Object filename
;
522 /* If the file name has special constructs in it,
523 call the corresponding file handler. */
524 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
526 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
528 return Ffile_name_directory (filename
);
533 file_name_as_directory (out
, in
)
536 int size
= strlen (in
) - 1;
549 /* Is it already a directory string? */
550 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
552 /* Is it a VMS directory file name? If so, hack VMS syntax. */
553 else if (! index (in
, '/')
554 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
555 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
556 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
557 || ! strncmp (&in
[size
- 5], ".dir", 4))
558 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
559 && in
[size
] == '1')))
561 register char *p
, *dot
;
565 dir:x.dir --> dir:[x]
566 dir:[x]y.dir --> dir:[x.y] */
568 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
571 strncpy (out
, in
, p
- in
);
590 dot
= index (p
, '.');
593 /* blindly remove any extension */
594 size
= strlen (out
) + (dot
- p
);
595 strncat (out
, p
, dot
- p
);
606 /* For Unix syntax, Append a slash if necessary */
607 if (!IS_DIRECTORY_SEP (out
[size
]))
609 /* Cannot use DIRECTORY_SEP, which could have any value */
611 out
[size
+ 2] = '\0';
614 CORRECT_DIR_SEPS (out
);
620 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
621 Sfile_name_as_directory
, 1, 1, 0,
622 doc
: /* Return a string representing the file name FILE interpreted as a directory.
623 This operation exists because a directory is also a file, but its name as
624 a directory is different from its name as a file.
625 The result can be used as the value of `default-directory'
626 or passed as second argument to `expand-file-name'.
627 For a Unix-syntax file name, just appends a slash.
628 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */)
639 /* If the file name has special constructs in it,
640 call the corresponding file handler. */
641 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
643 return call2 (handler
, Qfile_name_as_directory
, file
);
645 buf
= (char *) alloca (SBYTES (file
) + 10);
646 file_name_as_directory (buf
, SDATA (file
));
647 return make_specified_string (buf
, -1, strlen (buf
),
648 STRING_MULTIBYTE (file
));
652 * Convert from directory name to filename.
654 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
655 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
656 * On UNIX, it's simple: just make sure there isn't a terminating /
658 * Value is nonzero if the string output is different from the input.
662 directory_file_name (src
, dst
)
670 struct FAB fab
= cc$rms_fab
;
671 struct NAM nam
= cc$rms_nam
;
672 char esa
[NAM$C_MAXRSS
];
677 if (! index (src
, '/')
678 && (src
[slen
- 1] == ']'
679 || src
[slen
- 1] == ':'
680 || src
[slen
- 1] == '>'))
682 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
684 fab
.fab$b_fns
= slen
;
685 fab
.fab$l_nam
= &nam
;
686 fab
.fab$l_fop
= FAB$M_NAM
;
689 nam
.nam$b_ess
= sizeof esa
;
690 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
692 /* We call SYS$PARSE to handle such things as [--] for us. */
693 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
695 slen
= nam
.nam$b_esl
;
696 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
701 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
703 /* what about when we have logical_name:???? */
704 if (src
[slen
- 1] == ':')
705 { /* Xlate logical name and see what we get */
706 ptr
= strcpy (dst
, src
); /* upper case for getenv */
709 if ('a' <= *ptr
&& *ptr
<= 'z')
713 dst
[slen
- 1] = 0; /* remove colon */
714 if (!(src
= egetenv (dst
)))
716 /* should we jump to the beginning of this procedure?
717 Good points: allows us to use logical names that xlate
719 Bad points: can be a problem if we just translated to a device
721 For now, I'll punt and always expect VMS names, and hope for
724 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
725 { /* no recursion here! */
731 { /* not a directory spec */
736 bracket
= src
[slen
- 1];
738 /* If bracket is ']' or '>', bracket - 2 is the corresponding
740 ptr
= index (src
, bracket
- 2);
742 { /* no opening bracket */
746 if (!(rptr
= rindex (src
, '.')))
749 strncpy (dst
, src
, slen
);
753 dst
[slen
++] = bracket
;
758 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
759 then translate the device and recurse. */
760 if (dst
[slen
- 1] == ':'
761 && dst
[slen
- 2] != ':' /* skip decnet nodes */
762 && strcmp (src
+ slen
, "[000000]") == 0)
764 dst
[slen
- 1] = '\0';
765 if ((ptr
= egetenv (dst
))
766 && (rlen
= strlen (ptr
) - 1) > 0
767 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
768 && ptr
[rlen
- 1] == '.')
770 char * buf
= (char *) alloca (strlen (ptr
) + 1);
774 return directory_file_name (buf
, dst
);
779 strcat (dst
, "[000000]");
783 rlen
= strlen (rptr
) - 1;
784 strncat (dst
, rptr
, rlen
);
785 dst
[slen
+ rlen
] = '\0';
786 strcat (dst
, ".DIR.1");
790 /* Process as Unix format: just remove any final slash.
791 But leave "/" unchanged; do not change it to "". */
794 /* Handle // as root for apollo's. */
795 if ((slen
> 2 && dst
[slen
- 1] == '/')
796 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
800 && IS_DIRECTORY_SEP (dst
[slen
- 1])
802 && !IS_ANY_SEP (dst
[slen
- 2])
808 CORRECT_DIR_SEPS (dst
);
813 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
815 doc
: /* Returns the file name of the directory named DIRECTORY.
816 This is the name of the file that holds the data for the directory DIRECTORY.
817 This operation exists because a directory is also a file, but its name as
818 a directory is different from its name as a file.
819 In Unix-syntax, this function just removes the final slash.
820 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",
821 it returns a file name such as \"[X]Y.DIR.1\". */)
823 Lisp_Object directory
;
828 CHECK_STRING (directory
);
830 if (NILP (directory
))
833 /* If the file name has special constructs in it,
834 call the corresponding file handler. */
835 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
837 return call2 (handler
, Qdirectory_file_name
, directory
);
840 /* 20 extra chars is insufficient for VMS, since we might perform a
841 logical name translation. an equivalence string can be up to 255
842 chars long, so grab that much extra space... - sss */
843 buf
= (char *) alloca (SBYTES (directory
) + 20 + 255);
845 buf
= (char *) alloca (SBYTES (directory
) + 20);
847 directory_file_name (SDATA (directory
), buf
);
848 return make_specified_string (buf
, -1, strlen (buf
),
849 STRING_MULTIBYTE (directory
));
852 static char make_temp_name_tbl
[64] =
854 'A','B','C','D','E','F','G','H',
855 'I','J','K','L','M','N','O','P',
856 'Q','R','S','T','U','V','W','X',
857 'Y','Z','a','b','c','d','e','f',
858 'g','h','i','j','k','l','m','n',
859 'o','p','q','r','s','t','u','v',
860 'w','x','y','z','0','1','2','3',
861 '4','5','6','7','8','9','-','_'
864 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
866 /* Value is a temporary file name starting with PREFIX, a string.
868 The Emacs process number forms part of the result, so there is
869 no danger of generating a name being used by another process.
870 In addition, this function makes an attempt to choose a name
871 which has no existing file. To make this work, PREFIX should be
872 an absolute file name.
874 BASE64_P non-zero means add the pid as 3 characters in base64
875 encoding. In this case, 6 characters will be added to PREFIX to
876 form the file name. Otherwise, if Emacs is running on a system
877 with long file names, add the pid as a decimal number.
879 This function signals an error if no unique file name could be
883 make_temp_name (prefix
, base64_p
)
890 unsigned char *p
, *data
;
894 CHECK_STRING (prefix
);
896 /* VAL is created by adding 6 characters to PREFIX. The first
897 three are the PID of this process, in base 64, and the second
898 three are incremented if the file already exists. This ensures
899 262144 unique file names per PID per PREFIX. */
901 pid
= (int) getpid ();
905 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
906 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
907 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
912 #ifdef HAVE_LONG_FILE_NAMES
913 sprintf (pidbuf
, "%d", pid
);
914 pidlen
= strlen (pidbuf
);
916 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
917 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
918 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
923 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
924 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
925 if (!STRING_MULTIBYTE (prefix
))
926 STRING_SET_UNIBYTE (val
);
928 bcopy(SDATA (prefix
), data
, len
);
931 bcopy (pidbuf
, p
, pidlen
);
934 /* Here we try to minimize useless stat'ing when this function is
935 invoked many times successively with the same PREFIX. We achieve
936 this by initializing count to a random value, and incrementing it
939 We don't want make-temp-name to be called while dumping,
940 because then make_temp_name_count_initialized_p would get set
941 and then make_temp_name_count would not be set when Emacs starts. */
943 if (!make_temp_name_count_initialized_p
)
945 make_temp_name_count
= (unsigned) time (NULL
);
946 make_temp_name_count_initialized_p
= 1;
952 unsigned num
= make_temp_name_count
;
954 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
955 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
956 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
958 /* Poor man's congruential RN generator. Replace with
959 ++make_temp_name_count for debugging. */
960 make_temp_name_count
+= 25229;
961 make_temp_name_count
%= 225307;
963 if (stat (data
, &ignored
) < 0)
965 /* We want to return only if errno is ENOENT. */
969 /* The error here is dubious, but there is little else we
970 can do. The alternatives are to return nil, which is
971 as bad as (and in many cases worse than) throwing the
972 error, or to ignore the error, which will likely result
973 in looping through 225307 stat's, which is not only
974 dog-slow, but also useless since it will fallback to
975 the errow below, anyway. */
976 report_file_error ("Cannot create temporary name for prefix",
977 Fcons (prefix
, Qnil
));
982 error ("Cannot create temporary name for prefix `%s'",
988 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
989 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
990 The Emacs process number forms part of the result,
991 so there is no danger of generating a name being used by another process.
993 In addition, this function makes an attempt to choose a name
994 which has no existing file. To make this work,
995 PREFIX should be an absolute file name.
997 There is a race condition between calling `make-temp-name' and creating the
998 file which opens all kinds of security holes. For that reason, you should
999 probably use `make-temp-file' instead, except in three circumstances:
1001 * If you are creating the file in the user's home directory.
1002 * If you are creating a directory rather than an ordinary file.
1003 * If you are taking special precautions as `make-temp-file' does. */)
1007 return make_temp_name (prefix
, 0);
1012 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1013 doc
: /* Convert filename NAME to absolute, and canonicalize it.
1014 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
1015 \(does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
1016 the current buffer's value of default-directory is used.
1017 File name components that are `.' are removed, and
1018 so are file name components followed by `..', along with the `..' itself;
1019 note that these simplifications are done without checking the resulting
1020 file names in the file system.
1021 An initial `~/' expands to your home directory.
1022 An initial `~USER/' expands to USER's home directory.
1023 See also the function `substitute-in-file-name'. */)
1024 (name
, default_directory
)
1025 Lisp_Object name
, default_directory
;
1029 register unsigned char *newdir
, *p
, *o
;
1031 unsigned char *target
;
1034 unsigned char * colon
= 0;
1035 unsigned char * close
= 0;
1036 unsigned char * slash
= 0;
1037 unsigned char * brack
= 0;
1038 int lbrack
= 0, rbrack
= 0;
1043 int collapse_newdir
= 1;
1047 Lisp_Object handler
, result
;
1049 CHECK_STRING (name
);
1051 /* If the file name has special constructs in it,
1052 call the corresponding file handler. */
1053 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1054 if (!NILP (handler
))
1055 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1057 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1058 if (NILP (default_directory
))
1059 default_directory
= current_buffer
->directory
;
1060 if (! STRINGP (default_directory
))
1063 /* "/" is not considered a root directory on DOS_NT, so using "/"
1064 here causes an infinite recursion in, e.g., the following:
1066 (let (default-directory)
1067 (expand-file-name "a"))
1069 To avoid this, we set default_directory to the root of the
1071 extern char *emacs_root_dir (void);
1073 default_directory
= build_string (emacs_root_dir ());
1075 default_directory
= build_string ("/");
1079 if (!NILP (default_directory
))
1081 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1082 if (!NILP (handler
))
1083 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1086 o
= SDATA (default_directory
);
1088 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1089 It would be better to do this down below where we actually use
1090 default_directory. Unfortunately, calling Fexpand_file_name recursively
1091 could invoke GC, and the strings might be relocated. This would
1092 be annoying because we have pointers into strings lying around
1093 that would need adjusting, and people would add new pointers to
1094 the code and forget to adjust them, resulting in intermittent bugs.
1095 Putting this call here avoids all that crud.
1097 The EQ test avoids infinite recursion. */
1098 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1099 /* Save time in some common cases - as long as default_directory
1100 is not relative, it can be canonicalized with name below (if it
1101 is needed at all) without requiring it to be expanded now. */
1103 /* Detect MSDOS file names with drive specifiers. */
1104 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1106 /* Detect Windows file names in UNC format. */
1107 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1109 #else /* not DOS_NT */
1110 /* Detect Unix absolute file names (/... alone is not absolute on
1112 && ! (IS_DIRECTORY_SEP (o
[0]))
1113 #endif /* not DOS_NT */
1116 struct gcpro gcpro1
;
1119 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1123 name
= FILE_SYSTEM_CASE (name
);
1127 /* We will force directory separators to be either all \ or /, so make
1128 a local copy to modify, even if there ends up being no change. */
1129 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1131 /* Note if special escape prefix is present, but remove for now. */
1132 if (nm
[0] == '/' && nm
[1] == ':')
1138 /* Find and remove drive specifier if present; this makes nm absolute
1139 even if the rest of the name appears to be relative. Only look for
1140 drive specifier at the beginning. */
1141 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1148 /* If we see "c://somedir", we want to strip the first slash after the
1149 colon when stripping the drive letter. Otherwise, this expands to
1151 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1153 #endif /* WINDOWSNT */
1157 /* Discard any previous drive specifier if nm is now in UNC format. */
1158 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1164 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
1165 none are found, we can probably return right away. We will avoid
1166 allocating a new string if name is already fully expanded. */
1168 IS_DIRECTORY_SEP (nm
[0])
1170 && drive
&& !is_escaped
1173 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1180 /* If it turns out that the filename we want to return is just a
1181 suffix of FILENAME, we don't need to go through and edit
1182 things; we just need to construct a new string using data
1183 starting at the middle of FILENAME. If we set lose to a
1184 non-zero value, that means we've discovered that we can't do
1191 /* Since we know the name is absolute, we can assume that each
1192 element starts with a "/". */
1194 /* "." and ".." are hairy. */
1195 if (IS_DIRECTORY_SEP (p
[0])
1197 && (IS_DIRECTORY_SEP (p
[2])
1199 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1202 /* We want to replace multiple `/' in a row with a single
1205 && IS_DIRECTORY_SEP (p
[0])
1206 && IS_DIRECTORY_SEP (p
[1]))
1213 /* if dev:[dir]/, move nm to / */
1214 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1215 nm
= (brack
? brack
+ 1 : colon
+ 1);
1216 lbrack
= rbrack
= 0;
1223 #ifdef NO_HYPHENS_IN_FILENAMES
1224 if (lbrack
== rbrack
)
1226 /* Avoid clobbering negative version numbers. */
1231 #endif /* NO_HYPHENS_IN_FILENAMES */
1232 if (lbrack
> rbrack
&&
1233 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1234 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1236 #ifdef NO_HYPHENS_IN_FILENAMES
1239 #endif /* NO_HYPHENS_IN_FILENAMES */
1240 /* count open brackets, reset close bracket pointer */
1241 if (p
[0] == '[' || p
[0] == '<')
1242 lbrack
++, brack
= 0;
1243 /* count close brackets, set close bracket pointer */
1244 if (p
[0] == ']' || p
[0] == '>')
1245 rbrack
++, brack
= p
;
1246 /* detect ][ or >< */
1247 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1249 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1250 nm
= p
+ 1, lose
= 1;
1251 if (p
[0] == ':' && (colon
|| slash
))
1252 /* if dev1:[dir]dev2:, move nm to dev2: */
1258 /* if /name/dev:, move nm to dev: */
1261 /* if node::dev:, move colon following dev */
1262 else if (colon
&& colon
[-1] == ':')
1264 /* if dev1:dev2:, move nm to dev2: */
1265 else if (colon
&& colon
[-1] != ':')
1270 if (p
[0] == ':' && !colon
)
1276 if (lbrack
== rbrack
)
1279 else if (p
[0] == '.')
1287 if (index (nm
, '/'))
1289 nm
= sys_translate_unix (nm
);
1290 return make_specified_string (nm
, -1, strlen (nm
),
1291 STRING_MULTIBYTE (name
));
1295 /* Make sure directories are all separated with / or \ as
1296 desired, but avoid allocation of a new string when not
1298 CORRECT_DIR_SEPS (nm
);
1300 if (IS_DIRECTORY_SEP (nm
[1]))
1302 if (strcmp (nm
, SDATA (name
)) != 0)
1303 name
= make_specified_string (nm
, -1, strlen (nm
),
1304 STRING_MULTIBYTE (name
));
1308 /* drive must be set, so this is okay */
1309 if (strcmp (nm
- 2, SDATA (name
)) != 0)
1313 name
= make_specified_string (nm
, -1, p
- nm
,
1314 STRING_MULTIBYTE (name
));
1315 temp
[0] = DRIVE_LETTER (drive
);
1316 name
= concat2 (build_string (temp
), name
);
1319 #else /* not DOS_NT */
1320 if (nm
== SDATA (name
))
1322 return make_specified_string (nm
, -1, strlen (nm
),
1323 STRING_MULTIBYTE (name
));
1324 #endif /* not DOS_NT */
1328 /* At this point, nm might or might not be an absolute file name. We
1329 need to expand ~ or ~user if present, otherwise prefix nm with
1330 default_directory if nm is not absolute, and finally collapse /./
1331 and /foo/../ sequences.
1333 We set newdir to be the appropriate prefix if one is needed:
1334 - the relevant user directory if nm starts with ~ or ~user
1335 - the specified drive's working dir (DOS/NT only) if nm does not
1337 - the value of default_directory.
1339 Note that these prefixes are not guaranteed to be absolute (except
1340 for the working dir of a drive). Therefore, to ensure we always
1341 return an absolute name, if the final prefix is not absolute we
1342 append it to the current working directory. */
1346 if (nm
[0] == '~') /* prefix ~ */
1348 if (IS_DIRECTORY_SEP (nm
[1])
1352 || nm
[1] == 0) /* ~ by itself */
1354 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1355 newdir
= (unsigned char *) "";
1358 collapse_newdir
= 0;
1361 nm
++; /* Don't leave the slash in nm. */
1364 else /* ~user/filename */
1366 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1371 o
= (unsigned char *) alloca (p
- nm
+ 1);
1372 bcopy ((char *) nm
, o
, p
- nm
);
1375 pw
= (struct passwd
*) getpwnam (o
+ 1);
1378 newdir
= (unsigned char *) pw
-> pw_dir
;
1380 nm
= p
+ 1; /* skip the terminator */
1384 collapse_newdir
= 0;
1389 /* If we don't find a user of that name, leave the name
1390 unchanged; don't move nm forward to p. */
1395 /* On DOS and Windows, nm is absolute if a drive name was specified;
1396 use the drive's current directory as the prefix if needed. */
1397 if (!newdir
&& drive
)
1399 /* Get default directory if needed to make nm absolute. */
1400 if (!IS_DIRECTORY_SEP (nm
[0]))
1402 newdir
= alloca (MAXPATHLEN
+ 1);
1403 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1408 /* Either nm starts with /, or drive isn't mounted. */
1409 newdir
= alloca (4);
1410 newdir
[0] = DRIVE_LETTER (drive
);
1418 /* Finally, if no prefix has been specified and nm is not absolute,
1419 then it must be expanded relative to default_directory. */
1423 /* /... alone is not absolute on DOS and Windows. */
1424 && !IS_DIRECTORY_SEP (nm
[0])
1427 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1434 newdir
= SDATA (default_directory
);
1436 /* Note if special escape prefix is present, but remove for now. */
1437 if (newdir
[0] == '/' && newdir
[1] == ':')
1448 /* First ensure newdir is an absolute name. */
1450 /* Detect MSDOS file names with drive specifiers. */
1451 ! (IS_DRIVE (newdir
[0])
1452 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1454 /* Detect Windows file names in UNC format. */
1455 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1459 /* Effectively, let newdir be (expand-file-name newdir cwd).
1460 Because of the admonition against calling expand-file-name
1461 when we have pointers into lisp strings, we accomplish this
1462 indirectly by prepending newdir to nm if necessary, and using
1463 cwd (or the wd of newdir's drive) as the new newdir. */
1465 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1470 if (!IS_DIRECTORY_SEP (nm
[0]))
1472 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1473 file_name_as_directory (tmp
, newdir
);
1477 newdir
= alloca (MAXPATHLEN
+ 1);
1480 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1487 /* Strip off drive name from prefix, if present. */
1488 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1494 /* Keep only a prefix from newdir if nm starts with slash
1495 (//server/share for UNC, nothing otherwise). */
1496 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1499 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1501 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1503 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1505 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1517 /* Get rid of any slash at the end of newdir, unless newdir is
1518 just / or // (an incomplete UNC name). */
1519 length
= strlen (newdir
);
1520 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1522 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1526 unsigned char *temp
= (unsigned char *) alloca (length
);
1527 bcopy (newdir
, temp
, length
- 1);
1528 temp
[length
- 1] = 0;
1536 /* Now concatenate the directory and name to new space in the stack frame */
1537 tlen
+= strlen (nm
) + 1;
1539 /* Reserve space for drive specifier and escape prefix, since either
1540 or both may need to be inserted. (The Microsoft x86 compiler
1541 produces incorrect code if the following two lines are combined.) */
1542 target
= (unsigned char *) alloca (tlen
+ 4);
1544 #else /* not DOS_NT */
1545 target
= (unsigned char *) alloca (tlen
);
1546 #endif /* not DOS_NT */
1552 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1555 /* If newdir is effectively "C:/", then the drive letter will have
1556 been stripped and newdir will be "/". Concatenating with an
1557 absolute directory in nm produces "//", which will then be
1558 incorrectly treated as a network share. Ignore newdir in
1559 this case (keeping the drive letter). */
1560 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1561 && newdir
[1] == '\0'))
1563 strcpy (target
, newdir
);
1567 file_name_as_directory (target
, newdir
);
1570 strcat (target
, nm
);
1572 if (index (target
, '/'))
1573 strcpy (target
, sys_translate_unix (target
));
1576 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1578 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1587 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1593 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1594 /* brackets are offset from each other by 2 */
1597 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1598 /* convert [foo][bar] to [bar] */
1599 while (o
[-1] != '[' && o
[-1] != '<')
1601 else if (*p
== '-' && *o
!= '.')
1604 else if (p
[0] == '-' && o
[-1] == '.' &&
1605 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1606 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1610 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1611 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1613 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1615 /* else [foo.-] ==> [-] */
1619 #ifdef NO_HYPHENS_IN_FILENAMES
1621 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1622 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1624 #endif /* NO_HYPHENS_IN_FILENAMES */
1628 if (!IS_DIRECTORY_SEP (*p
))
1632 else if (IS_DIRECTORY_SEP (p
[0])
1634 && (IS_DIRECTORY_SEP (p
[2])
1637 /* If "/." is the entire filename, keep the "/". Otherwise,
1638 just delete the whole "/.". */
1639 if (o
== target
&& p
[2] == '\0')
1643 else if (IS_DIRECTORY_SEP (p
[0]) && p
[1] == '.' && p
[2] == '.'
1644 /* `/../' is the "superroot" on certain file systems. */
1646 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1648 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1650 /* Keep initial / only if this is the whole name. */
1651 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1656 && IS_DIRECTORY_SEP (p
[0]) && IS_DIRECTORY_SEP (p
[1]))
1658 /* Collapse multiple `/' in a row. */
1660 while (IS_DIRECTORY_SEP (*p
))
1667 #endif /* not VMS */
1671 /* At last, set drive name. */
1673 /* Except for network file name. */
1674 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1675 #endif /* WINDOWSNT */
1677 if (!drive
) abort ();
1679 target
[0] = DRIVE_LETTER (drive
);
1682 /* Reinsert the escape prefix if required. */
1689 CORRECT_DIR_SEPS (target
);
1692 result
= make_specified_string (target
, -1, o
- target
,
1693 STRING_MULTIBYTE (name
));
1695 /* Again look to see if the file name has special constructs in it
1696 and perhaps call the corresponding file handler. This is needed
1697 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1698 the ".." component gives us "/user@host:/bar/../baz" which needs
1699 to be expanded again. */
1700 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1701 if (!NILP (handler
))
1702 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1708 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1709 This is the old version of expand-file-name, before it was thoroughly
1710 rewritten for Emacs 10.31. We leave this version here commented-out,
1711 because the code is very complex and likely to have subtle bugs. If
1712 bugs _are_ found, it might be of interest to look at the old code and
1713 see what did it do in the relevant situation.
1715 Don't remove this code: it's true that it will be accessible via CVS,
1716 but a few years from deletion, people will forget it is there. */
1718 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1719 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1720 "Convert FILENAME to absolute, and canonicalize it.\n\
1721 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1722 \(does not start with slash); if DEFAULT is nil or missing,\n\
1723 the current buffer's value of default-directory is used.\n\
1724 Filenames containing `.' or `..' as components are simplified;\n\
1725 initial `~/' expands to your home directory.\n\
1726 See also the function `substitute-in-file-name'.")
1728 Lisp_Object name
, defalt
;
1732 register unsigned char *newdir
, *p
, *o
;
1734 unsigned char *target
;
1738 unsigned char * colon
= 0;
1739 unsigned char * close
= 0;
1740 unsigned char * slash
= 0;
1741 unsigned char * brack
= 0;
1742 int lbrack
= 0, rbrack
= 0;
1746 CHECK_STRING (name
);
1749 /* Filenames on VMS are always upper case. */
1750 name
= Fupcase (name
);
1755 /* If nm is absolute, flush ...// and detect /./ and /../.
1756 If no /./ or /../ we can return right away. */
1768 if (p
[0] == '/' && p
[1] == '/'
1770 /* // at start of filename is meaningful on Apollo system. */
1775 if (p
[0] == '/' && p
[1] == '~')
1776 nm
= p
+ 1, lose
= 1;
1777 if (p
[0] == '/' && p
[1] == '.'
1778 && (p
[2] == '/' || p
[2] == 0
1779 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1785 /* if dev:[dir]/, move nm to / */
1786 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1787 nm
= (brack
? brack
+ 1 : colon
+ 1);
1788 lbrack
= rbrack
= 0;
1796 /* VMS pre V4.4,convert '-'s in filenames. */
1797 if (lbrack
== rbrack
)
1799 if (dots
< 2) /* this is to allow negative version numbers */
1804 if (lbrack
> rbrack
&&
1805 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1806 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1812 /* count open brackets, reset close bracket pointer */
1813 if (p
[0] == '[' || p
[0] == '<')
1814 lbrack
++, brack
= 0;
1815 /* count close brackets, set close bracket pointer */
1816 if (p
[0] == ']' || p
[0] == '>')
1817 rbrack
++, brack
= p
;
1818 /* detect ][ or >< */
1819 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1821 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1822 nm
= p
+ 1, lose
= 1;
1823 if (p
[0] == ':' && (colon
|| slash
))
1824 /* if dev1:[dir]dev2:, move nm to dev2: */
1830 /* If /name/dev:, move nm to dev: */
1833 /* If node::dev:, move colon following dev */
1834 else if (colon
&& colon
[-1] == ':')
1836 /* If dev1:dev2:, move nm to dev2: */
1837 else if (colon
&& colon
[-1] != ':')
1842 if (p
[0] == ':' && !colon
)
1848 if (lbrack
== rbrack
)
1851 else if (p
[0] == '.')
1859 if (index (nm
, '/'))
1860 return build_string (sys_translate_unix (nm
));
1862 if (nm
== SDATA (name
))
1864 return build_string (nm
);
1868 /* Now determine directory to start with and put it in NEWDIR */
1872 if (nm
[0] == '~') /* prefix ~ */
1877 || nm
[1] == 0)/* ~/filename */
1879 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1880 newdir
= (unsigned char *) "";
1883 nm
++; /* Don't leave the slash in nm. */
1886 else /* ~user/filename */
1888 /* Get past ~ to user */
1889 unsigned char *user
= nm
+ 1;
1890 /* Find end of name. */
1891 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1892 int len
= ptr
? ptr
- user
: strlen (user
);
1894 unsigned char *ptr1
= index (user
, ':');
1895 if (ptr1
!= 0 && ptr1
- user
< len
)
1898 /* Copy the user name into temp storage. */
1899 o
= (unsigned char *) alloca (len
+ 1);
1900 bcopy ((char *) user
, o
, len
);
1903 /* Look up the user name. */
1904 pw
= (struct passwd
*) getpwnam (o
+ 1);
1906 error ("\"%s\" isn't a registered user", o
+ 1);
1908 newdir
= (unsigned char *) pw
->pw_dir
;
1910 /* Discard the user name from NM. */
1917 #endif /* not VMS */
1921 defalt
= current_buffer
->directory
;
1922 CHECK_STRING (defalt
);
1923 newdir
= SDATA (defalt
);
1926 /* Now concatenate the directory and name to new space in the stack frame */
1928 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1929 target
= (unsigned char *) alloca (tlen
);
1935 if (nm
[0] == 0 || nm
[0] == '/')
1936 strcpy (target
, newdir
);
1939 file_name_as_directory (target
, newdir
);
1942 strcat (target
, nm
);
1944 if (index (target
, '/'))
1945 strcpy (target
, sys_translate_unix (target
));
1948 /* Now canonicalize by removing /. and /foo/.. if they appear */
1956 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1962 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1963 /* brackets are offset from each other by 2 */
1966 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1967 /* convert [foo][bar] to [bar] */
1968 while (o
[-1] != '[' && o
[-1] != '<')
1970 else if (*p
== '-' && *o
!= '.')
1973 else if (p
[0] == '-' && o
[-1] == '.' &&
1974 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1975 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1979 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1980 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1982 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1984 /* else [foo.-] ==> [-] */
1990 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1991 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
2001 else if (!strncmp (p
, "//", 2)
2003 /* // at start of filename is meaningful in Apollo system. */
2011 else if (p
[0] == '/' && p
[1] == '.' &&
2012 (p
[2] == '/' || p
[2] == 0))
2014 else if (!strncmp (p
, "/..", 3)
2015 /* `/../' is the "superroot" on certain file systems. */
2017 && (p
[3] == '/' || p
[3] == 0))
2019 while (o
!= target
&& *--o
!= '/')
2022 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
2026 if (o
== target
&& *o
== '/')
2034 #endif /* not VMS */
2037 return make_string (target
, o
- target
);
2041 /* If /~ or // appears, discard everything through first slash. */
2043 file_name_absolute_p (filename
)
2044 const unsigned char *filename
;
2047 (IS_DIRECTORY_SEP (*filename
) || *filename
== '~'
2049 /* ??? This criterion is probably wrong for '<'. */
2050 || index (filename
, ':') || index (filename
, '<')
2051 || (*filename
== '[' && (filename
[1] != '-'
2052 || (filename
[2] != '.' && filename
[2] != ']'))
2053 && filename
[1] != '.')
2056 || (IS_DRIVE (*filename
) && IS_DEVICE_SEP (filename
[1])
2057 && IS_DIRECTORY_SEP (filename
[2]))
2062 static unsigned char *
2063 search_embedded_absfilename (nm
, endp
)
2064 unsigned char *nm
, *endp
;
2066 unsigned char *p
, *s
;
2068 for (p
= nm
+ 1; p
< endp
; p
++)
2072 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2074 || IS_DIRECTORY_SEP (p
[-1]))
2075 && file_name_absolute_p (p
)
2076 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2077 /* // at start of file name is meaningful in Apollo,
2078 WindowsNT and Cygwin systems. */
2079 && !(IS_DIRECTORY_SEP (p
[0]) && p
- 1 == nm
)
2080 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2083 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)
2088 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
2090 unsigned char *o
= alloca (s
- p
+ 1);
2092 bcopy (p
, o
, s
- p
);
2095 /* If we have ~user and `user' exists, discard
2096 everything up to ~. But if `user' does not exist, leave
2097 ~user alone, it might be a literal file name. */
2098 if ((pw
= getpwnam (o
+ 1)))
2110 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
2111 Ssubstitute_in_file_name
, 1, 1, 0,
2112 doc
: /* Substitute environment variables referred to in FILENAME.
2113 `$FOO' where FOO is an environment variable name means to substitute
2114 the value of that variable. The variable name should be terminated
2115 with a character not a letter, digit or underscore; otherwise, enclose
2116 the entire variable name in braces.
2117 If `/~' appears, all of FILENAME through that `/' is discarded.
2119 On VMS, `$' substitution is not done; this function does little and only
2120 duplicates what `expand-file-name' does. */)
2122 Lisp_Object filename
;
2126 register unsigned char *s
, *p
, *o
, *x
, *endp
;
2127 unsigned char *target
= NULL
;
2129 int substituted
= 0;
2131 Lisp_Object handler
;
2133 CHECK_STRING (filename
);
2135 /* If the file name has special constructs in it,
2136 call the corresponding file handler. */
2137 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
2138 if (!NILP (handler
))
2139 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
2141 nm
= SDATA (filename
);
2143 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
2144 CORRECT_DIR_SEPS (nm
);
2145 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
2147 endp
= nm
+ SBYTES (filename
);
2149 /* If /~ or // appears, discard everything through first slash. */
2150 p
= search_embedded_absfilename (nm
, endp
);
2152 /* Start over with the new string, so we check the file-name-handler
2153 again. Important with filenames like "/home/foo//:/hello///there"
2154 which whould substitute to "/:/hello///there" rather than "/there". */
2155 return Fsubstitute_in_file_name
2156 (make_specified_string (p
, -1, endp
- p
,
2157 STRING_MULTIBYTE (filename
)));
2163 /* See if any variables are substituted into the string
2164 and find the total length of their values in `total' */
2166 for (p
= nm
; p
!= endp
;)
2176 /* "$$" means a single "$" */
2185 while (p
!= endp
&& *p
!= '}') p
++;
2186 if (*p
!= '}') goto missingclose
;
2192 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2196 /* Copy out the variable name */
2197 target
= (unsigned char *) alloca (s
- o
+ 1);
2198 strncpy (target
, o
, s
- o
);
2201 strupr (target
); /* $home == $HOME etc. */
2204 /* Get variable value */
2205 o
= (unsigned char *) egetenv (target
);
2208 total
+= strlen (o
);
2218 /* If substitution required, recopy the string and do it */
2219 /* Make space in stack frame for the new copy */
2220 xnm
= (unsigned char *) alloca (SBYTES (filename
) + total
+ 1);
2223 /* Copy the rest of the name through, replacing $ constructs with values */
2240 while (p
!= endp
&& *p
!= '}') p
++;
2241 if (*p
!= '}') goto missingclose
;
2247 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2251 /* Copy out the variable name */
2252 target
= (unsigned char *) alloca (s
- o
+ 1);
2253 strncpy (target
, o
, s
- o
);
2256 strupr (target
); /* $home == $HOME etc. */
2259 /* Get variable value */
2260 o
= (unsigned char *) egetenv (target
);
2264 strcpy (x
, target
); x
+= strlen (target
);
2266 else if (STRING_MULTIBYTE (filename
))
2268 /* If the original string is multibyte,
2269 convert what we substitute into multibyte. */
2272 int c
= unibyte_char_to_multibyte (*o
++);
2273 x
+= CHAR_STRING (c
, x
);
2285 /* If /~ or // appears, discard everything through first slash. */
2286 while ((p
= search_embedded_absfilename (xnm
, x
)))
2287 /* This time we do not start over because we've already expanded envvars
2288 and replaced $$ with $. Maybe we should start over as well, but we'd
2289 need to quote some $ to $$ first. */
2292 return make_specified_string (xnm
, -1, x
- xnm
, STRING_MULTIBYTE (filename
));
2295 error ("Bad format environment-variable substitution");
2297 error ("Missing \"}\" in environment-variable substitution");
2299 error ("Substituting nonexistent environment variable \"%s\"", target
);
2302 #endif /* not VMS */
2306 /* A slightly faster and more convenient way to get
2307 (directory-file-name (expand-file-name FOO)). */
2310 expand_and_dir_to_file (filename
, defdir
)
2311 Lisp_Object filename
, defdir
;
2313 register Lisp_Object absname
;
2315 absname
= Fexpand_file_name (filename
, defdir
);
2318 register int c
= SREF (absname
, SBYTES (absname
) - 1);
2319 if (c
== ':' || c
== ']' || c
== '>')
2320 absname
= Fdirectory_file_name (absname
);
2323 /* Remove final slash, if any (unless this is the root dir).
2324 stat behaves differently depending! */
2325 if (SCHARS (absname
) > 1
2326 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
2327 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
2328 /* We cannot take shortcuts; they might be wrong for magic file names. */
2329 absname
= Fdirectory_file_name (absname
);
2334 /* Signal an error if the file ABSNAME already exists.
2335 If INTERACTIVE is nonzero, ask the user whether to proceed,
2336 and bypass the error if the user says to go ahead.
2337 QUERYSTRING is a name for the action that is being considered
2340 *STATPTR is used to store the stat information if the file exists.
2341 If the file does not exist, STATPTR->st_mode is set to 0.
2342 If STATPTR is null, we don't store into it.
2344 If QUICK is nonzero, we ask for y or n, not yes or no. */
2347 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2348 Lisp_Object absname
;
2349 unsigned char *querystring
;
2351 struct stat
*statptr
;
2354 register Lisp_Object tem
, encoded_filename
;
2355 struct stat statbuf
;
2356 struct gcpro gcpro1
;
2358 encoded_filename
= ENCODE_FILE (absname
);
2360 /* stat is a good way to tell whether the file exists,
2361 regardless of what access permissions it has. */
2362 if (lstat (SDATA (encoded_filename
), &statbuf
) >= 0)
2365 Fsignal (Qfile_already_exists
,
2366 Fcons (build_string ("File already exists"),
2367 Fcons (absname
, Qnil
)));
2369 tem
= format2 ("File %s already exists; %s anyway? ",
2370 absname
, build_string (querystring
));
2372 tem
= Fy_or_n_p (tem
);
2374 tem
= do_yes_or_no_p (tem
);
2377 Fsignal (Qfile_already_exists
,
2378 Fcons (build_string ("File already exists"),
2379 Fcons (absname
, Qnil
)));
2386 statptr
->st_mode
= 0;
2391 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 4,
2392 "fCopy file: \nGCopy %s to file: \np\nP",
2393 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
2394 If NEWNAME names a directory, copy FILE there.
2395 Signals a `file-already-exists' error if file NEWNAME already exists,
2396 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
2397 A number as third arg means request confirmation if NEWNAME already exists.
2398 This is what happens in interactive use with M-x.
2399 Always sets the file modes of the output file to match the input file.
2400 Fourth arg KEEP-TIME non-nil means give the output file the same
2401 last-modified time as the old one. (This works on only some systems.)
2402 A prefix arg makes KEEP-TIME non-nil. */)
2403 (file
, newname
, ok_if_already_exists
, keep_time
)
2404 Lisp_Object file
, newname
, ok_if_already_exists
, keep_time
;
2407 char buf
[16 * 1024];
2408 struct stat st
, out_st
;
2409 Lisp_Object handler
;
2410 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2411 int count
= SPECPDL_INDEX ();
2412 int input_file_statable_p
;
2413 Lisp_Object encoded_file
, encoded_newname
;
2415 encoded_file
= encoded_newname
= Qnil
;
2416 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2417 CHECK_STRING (file
);
2418 CHECK_STRING (newname
);
2420 if (!NILP (Ffile_directory_p (newname
)))
2421 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2423 newname
= Fexpand_file_name (newname
, Qnil
);
2425 file
= Fexpand_file_name (file
, Qnil
);
2427 /* If the input file name has special constructs in it,
2428 call the corresponding file handler. */
2429 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2430 /* Likewise for output file name. */
2432 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2433 if (!NILP (handler
))
2434 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2435 ok_if_already_exists
, keep_time
));
2437 encoded_file
= ENCODE_FILE (file
);
2438 encoded_newname
= ENCODE_FILE (newname
);
2440 if (NILP (ok_if_already_exists
)
2441 || INTEGERP (ok_if_already_exists
))
2442 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2443 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2444 else if (stat (SDATA (encoded_newname
), &out_st
) < 0)
2448 if (!CopyFile (SDATA (encoded_file
),
2449 SDATA (encoded_newname
),
2451 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
2452 /* CopyFile retains the timestamp by default. */
2453 else if (NILP (keep_time
))
2459 EMACS_GET_TIME (now
);
2460 filename
= SDATA (encoded_newname
);
2462 /* Ensure file is writable while its modified time is set. */
2463 attributes
= GetFileAttributes (filename
);
2464 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
2465 if (set_file_times (filename
, now
, now
))
2467 /* Restore original attributes. */
2468 SetFileAttributes (filename
, attributes
);
2469 Fsignal (Qfile_date_error
,
2470 Fcons (build_string ("Cannot set file date"),
2471 Fcons (newname
, Qnil
)));
2473 /* Restore original attributes. */
2474 SetFileAttributes (filename
, attributes
);
2476 #else /* not WINDOWSNT */
2478 ifd
= emacs_open (SDATA (encoded_file
), O_RDONLY
, 0);
2482 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2484 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2486 /* We can only copy regular files and symbolic links. Other files are not
2488 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2490 #if !defined (DOS_NT) || __DJGPP__ > 1
2491 if (out_st
.st_mode
!= 0
2492 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2495 report_file_error ("Input and output files are the same",
2496 Fcons (file
, Fcons (newname
, Qnil
)));
2500 #if defined (S_ISREG) && defined (S_ISLNK)
2501 if (input_file_statable_p
)
2503 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2505 #if defined (EISDIR)
2506 /* Get a better looking error message. */
2509 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2512 #endif /* S_ISREG && S_ISLNK */
2515 /* Create the copy file with the same record format as the input file */
2516 ofd
= sys_creat (SDATA (encoded_newname
), 0666, ifd
);
2519 /* System's default file type was set to binary by _fmode in emacs.c. */
2520 ofd
= creat (SDATA (encoded_newname
), S_IREAD
| S_IWRITE
);
2521 #else /* not MSDOS */
2522 ofd
= creat (SDATA (encoded_newname
), 0666);
2523 #endif /* not MSDOS */
2526 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2528 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2532 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2533 if (emacs_write (ofd
, buf
, n
) != n
)
2534 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2537 /* Closing the output clobbers the file times on some systems. */
2538 if (emacs_close (ofd
) < 0)
2539 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2541 if (input_file_statable_p
)
2543 if (!NILP (keep_time
))
2545 EMACS_TIME atime
, mtime
;
2546 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2547 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2548 if (set_file_times (SDATA (encoded_newname
),
2550 Fsignal (Qfile_date_error
,
2551 Fcons (build_string ("Cannot set file date"),
2552 Fcons (newname
, Qnil
)));
2555 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2557 #if defined (__DJGPP__) && __DJGPP__ > 1
2558 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2559 and if it can't, it tells so. Otherwise, under MSDOS we usually
2560 get only the READ bit, which will make the copied file read-only,
2561 so it's better not to chmod at all. */
2562 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2563 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2564 #endif /* DJGPP version 2 or newer */
2569 #endif /* WINDOWSNT */
2571 /* Discard the unwind protects. */
2572 specpdl_ptr
= specpdl
+ count
;
2578 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2579 Smake_directory_internal
, 1, 1, 0,
2580 doc
: /* Create a new directory named DIRECTORY. */)
2582 Lisp_Object directory
;
2584 const unsigned char *dir
;
2585 Lisp_Object handler
;
2586 Lisp_Object encoded_dir
;
2588 CHECK_STRING (directory
);
2589 directory
= Fexpand_file_name (directory
, Qnil
);
2591 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2592 if (!NILP (handler
))
2593 return call2 (handler
, Qmake_directory_internal
, directory
);
2595 encoded_dir
= ENCODE_FILE (directory
);
2597 dir
= SDATA (encoded_dir
);
2600 if (mkdir (dir
) != 0)
2602 if (mkdir (dir
, 0777) != 0)
2604 report_file_error ("Creating directory", Flist (1, &directory
));
2609 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2610 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2612 Lisp_Object directory
;
2614 const unsigned char *dir
;
2615 Lisp_Object handler
;
2616 Lisp_Object encoded_dir
;
2618 CHECK_STRING (directory
);
2619 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2621 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2622 if (!NILP (handler
))
2623 return call2 (handler
, Qdelete_directory
, directory
);
2625 encoded_dir
= ENCODE_FILE (directory
);
2627 dir
= SDATA (encoded_dir
);
2629 if (rmdir (dir
) != 0)
2630 report_file_error ("Removing directory", Flist (1, &directory
));
2635 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2636 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2637 If file has multiple names, it continues to exist with the other names. */)
2639 Lisp_Object filename
;
2641 Lisp_Object handler
;
2642 Lisp_Object encoded_file
;
2643 struct gcpro gcpro1
;
2646 if (!NILP (Ffile_directory_p (filename
))
2647 && NILP (Ffile_symlink_p (filename
)))
2648 Fsignal (Qfile_error
,
2649 Fcons (build_string ("Removing old name: is a directory"),
2650 Fcons (filename
, Qnil
)));
2652 filename
= Fexpand_file_name (filename
, Qnil
);
2654 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2655 if (!NILP (handler
))
2656 return call2 (handler
, Qdelete_file
, filename
);
2658 encoded_file
= ENCODE_FILE (filename
);
2660 if (0 > unlink (SDATA (encoded_file
)))
2661 report_file_error ("Removing old name", Flist (1, &filename
));
2666 internal_delete_file_1 (ignore
)
2672 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2675 internal_delete_file (filename
)
2676 Lisp_Object filename
;
2678 return NILP (internal_condition_case_1 (Fdelete_file
, filename
,
2679 Qt
, internal_delete_file_1
));
2682 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2683 "fRename file: \nGRename %s to file: \np",
2684 doc
: /* Rename FILE as NEWNAME. Both args strings.
2685 If file has names other than FILE, it continues to have those names.
2686 Signals a `file-already-exists' error if a file NEWNAME already exists
2687 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2688 A number as third arg means request confirmation if NEWNAME already exists.
2689 This is what happens in interactive use with M-x. */)
2690 (file
, newname
, ok_if_already_exists
)
2691 Lisp_Object file
, newname
, ok_if_already_exists
;
2694 Lisp_Object args
[2];
2696 Lisp_Object handler
;
2697 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2698 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2700 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2701 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2702 CHECK_STRING (file
);
2703 CHECK_STRING (newname
);
2704 file
= Fexpand_file_name (file
, Qnil
);
2706 if (!NILP (Ffile_directory_p (newname
)))
2707 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2709 newname
= Fexpand_file_name (newname
, Qnil
);
2711 /* If the file name has special constructs in it,
2712 call the corresponding file handler. */
2713 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2715 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2716 if (!NILP (handler
))
2717 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2718 file
, newname
, ok_if_already_exists
));
2720 encoded_file
= ENCODE_FILE (file
);
2721 encoded_newname
= ENCODE_FILE (newname
);
2724 /* If the file names are identical but for the case, don't ask for
2725 confirmation: they simply want to change the letter-case of the
2727 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2729 if (NILP (ok_if_already_exists
)
2730 || INTEGERP (ok_if_already_exists
))
2731 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2732 INTEGERP (ok_if_already_exists
), 0, 0);
2734 if (0 > rename (SDATA (encoded_file
), SDATA (encoded_newname
)))
2736 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
))
2737 || 0 > unlink (SDATA (encoded_file
)))
2743 symlink_target
= Ffile_symlink_p (file
);
2744 if (! NILP (symlink_target
))
2745 Fmake_symbolic_link (symlink_target
, newname
,
2746 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2749 Fcopy_file (file
, newname
,
2750 /* We have already prompted if it was an integer,
2751 so don't have copy-file prompt again. */
2752 NILP (ok_if_already_exists
) ? Qnil
: Qt
, Qt
);
2753 Fdelete_file (file
);
2760 report_file_error ("Renaming", Flist (2, args
));
2763 report_file_error ("Renaming", Flist (2, &file
));
2770 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2771 "fAdd name to file: \nGName to add to %s: \np",
2772 doc
: /* Give FILE additional name NEWNAME. Both args strings.
2773 Signals a `file-already-exists' error if a file NEWNAME already exists
2774 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2775 A number as third arg means request confirmation if NEWNAME already exists.
2776 This is what happens in interactive use with M-x. */)
2777 (file
, newname
, ok_if_already_exists
)
2778 Lisp_Object file
, newname
, ok_if_already_exists
;
2781 Lisp_Object args
[2];
2783 Lisp_Object handler
;
2784 Lisp_Object encoded_file
, encoded_newname
;
2785 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2787 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2788 encoded_file
= encoded_newname
= Qnil
;
2789 CHECK_STRING (file
);
2790 CHECK_STRING (newname
);
2791 file
= Fexpand_file_name (file
, Qnil
);
2793 if (!NILP (Ffile_directory_p (newname
)))
2794 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2796 newname
= Fexpand_file_name (newname
, Qnil
);
2798 /* If the file name has special constructs in it,
2799 call the corresponding file handler. */
2800 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2801 if (!NILP (handler
))
2802 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2803 newname
, ok_if_already_exists
));
2805 /* If the new name has special constructs in it,
2806 call the corresponding file handler. */
2807 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2808 if (!NILP (handler
))
2809 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2810 newname
, ok_if_already_exists
));
2812 encoded_file
= ENCODE_FILE (file
);
2813 encoded_newname
= ENCODE_FILE (newname
);
2815 if (NILP (ok_if_already_exists
)
2816 || INTEGERP (ok_if_already_exists
))
2817 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2818 INTEGERP (ok_if_already_exists
), 0, 0);
2820 unlink (SDATA (newname
));
2821 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
)))
2826 report_file_error ("Adding new name", Flist (2, args
));
2828 report_file_error ("Adding new name", Flist (2, &file
));
2837 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2838 "FMake symbolic link to file: \nGMake symbolic link to file %s: \np",
2839 doc
: /* Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
2840 Signals a `file-already-exists' error if a file LINKNAME already exists
2841 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2842 A number as third arg means request confirmation if LINKNAME already exists.
2843 This happens for interactive use with M-x. */)
2844 (filename
, linkname
, ok_if_already_exists
)
2845 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2848 Lisp_Object args
[2];
2850 Lisp_Object handler
;
2851 Lisp_Object encoded_filename
, encoded_linkname
;
2852 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2854 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2855 encoded_filename
= encoded_linkname
= Qnil
;
2856 CHECK_STRING (filename
);
2857 CHECK_STRING (linkname
);
2858 /* If the link target has a ~, we must expand it to get
2859 a truly valid file name. Otherwise, do not expand;
2860 we want to permit links to relative file names. */
2861 if (SREF (filename
, 0) == '~')
2862 filename
= Fexpand_file_name (filename
, Qnil
);
2864 if (!NILP (Ffile_directory_p (linkname
)))
2865 linkname
= Fexpand_file_name (Ffile_name_nondirectory (filename
), linkname
);
2867 linkname
= Fexpand_file_name (linkname
, Qnil
);
2869 /* If the file name has special constructs in it,
2870 call the corresponding file handler. */
2871 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2872 if (!NILP (handler
))
2873 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2874 linkname
, ok_if_already_exists
));
2876 /* If the new link name has special constructs in it,
2877 call the corresponding file handler. */
2878 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2879 if (!NILP (handler
))
2880 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2881 linkname
, ok_if_already_exists
));
2883 encoded_filename
= ENCODE_FILE (filename
);
2884 encoded_linkname
= ENCODE_FILE (linkname
);
2886 if (NILP (ok_if_already_exists
)
2887 || INTEGERP (ok_if_already_exists
))
2888 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2889 INTEGERP (ok_if_already_exists
), 0, 0);
2890 if (0 > symlink (SDATA (encoded_filename
),
2891 SDATA (encoded_linkname
)))
2893 /* If we didn't complain already, silently delete existing file. */
2894 if (errno
== EEXIST
)
2896 unlink (SDATA (encoded_linkname
));
2897 if (0 <= symlink (SDATA (encoded_filename
),
2898 SDATA (encoded_linkname
)))
2908 report_file_error ("Making symbolic link", Flist (2, args
));
2910 report_file_error ("Making symbolic link", Flist (2, &filename
));
2916 #endif /* S_IFLNK */
2920 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2921 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2922 doc
: /* Define the job-wide logical name NAME to have the value STRING.
2923 If STRING is nil or a null string, the logical name NAME is deleted. */)
2928 CHECK_STRING (name
);
2930 delete_logical_name (SDATA (name
));
2933 CHECK_STRING (string
);
2935 if (SCHARS (string
) == 0)
2936 delete_logical_name (SDATA (name
));
2938 define_logical_name (SDATA (name
), SDATA (string
));
2947 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
2948 doc
: /* Open a network connection to PATH using LOGIN as the login string. */)
2950 Lisp_Object path
, login
;
2954 CHECK_STRING (path
);
2955 CHECK_STRING (login
);
2957 netresult
= netunam (SDATA (path
), SDATA (login
));
2959 if (netresult
== -1)
2964 #endif /* HPUX_NET */
2966 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2968 doc
: /* Return t if file FILENAME specifies an absolute file name.
2969 On Unix, this is a name starting with a `/' or a `~'. */)
2971 Lisp_Object filename
;
2973 CHECK_STRING (filename
);
2974 return file_name_absolute_p (SDATA (filename
)) ? Qt
: Qnil
;
2977 /* Return nonzero if file FILENAME exists and can be executed. */
2980 check_executable (filename
)
2984 int len
= strlen (filename
);
2987 if (stat (filename
, &st
) < 0)
2989 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
2990 return ((st
.st_mode
& S_IEXEC
) != 0);
2992 return (S_ISREG (st
.st_mode
)
2994 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
2995 || stricmp (suffix
, ".exe") == 0
2996 || stricmp (suffix
, ".bat") == 0)
2997 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2998 #endif /* not WINDOWSNT */
2999 #else /* not DOS_NT */
3000 #ifdef HAVE_EUIDACCESS
3001 return (euidaccess (filename
, 1) >= 0);
3003 /* Access isn't quite right because it uses the real uid
3004 and we really want to test with the effective uid.
3005 But Unix doesn't give us a right way to do it. */
3006 return (access (filename
, 1) >= 0);
3008 #endif /* not DOS_NT */
3011 /* Return nonzero if file FILENAME exists and can be written. */
3014 check_writable (filename
)
3019 if (stat (filename
, &st
) < 0)
3021 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3022 #else /* not MSDOS */
3023 #ifdef HAVE_EUIDACCESS
3024 return (euidaccess (filename
, 2) >= 0);
3026 /* Access isn't quite right because it uses the real uid
3027 and we really want to test with the effective uid.
3028 But Unix doesn't give us a right way to do it.
3029 Opening with O_WRONLY could work for an ordinary file,
3030 but would lose for directories. */
3031 return (access (filename
, 2) >= 0);
3033 #endif /* not MSDOS */
3036 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
3037 doc
: /* Return t if file FILENAME exists. (This does not mean you can read it.)
3038 See also `file-readable-p' and `file-attributes'. */)
3040 Lisp_Object filename
;
3042 Lisp_Object absname
;
3043 Lisp_Object handler
;
3044 struct stat statbuf
;
3046 CHECK_STRING (filename
);
3047 absname
= Fexpand_file_name (filename
, Qnil
);
3049 /* If the file name has special constructs in it,
3050 call the corresponding file handler. */
3051 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
3052 if (!NILP (handler
))
3053 return call2 (handler
, Qfile_exists_p
, absname
);
3055 absname
= ENCODE_FILE (absname
);
3057 return (stat (SDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
3060 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
3061 doc
: /* Return t if FILENAME can be executed by you.
3062 For a directory, this means you can access files in that directory. */)
3064 Lisp_Object filename
;
3066 Lisp_Object absname
;
3067 Lisp_Object handler
;
3069 CHECK_STRING (filename
);
3070 absname
= Fexpand_file_name (filename
, Qnil
);
3072 /* If the file name has special constructs in it,
3073 call the corresponding file handler. */
3074 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
3075 if (!NILP (handler
))
3076 return call2 (handler
, Qfile_executable_p
, absname
);
3078 absname
= ENCODE_FILE (absname
);
3080 return (check_executable (SDATA (absname
)) ? Qt
: Qnil
);
3083 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
3084 doc
: /* Return t if file FILENAME exists and you can read it.
3085 See also `file-exists-p' and `file-attributes'. */)
3087 Lisp_Object filename
;
3089 Lisp_Object absname
;
3090 Lisp_Object handler
;
3093 struct stat statbuf
;
3095 CHECK_STRING (filename
);
3096 absname
= Fexpand_file_name (filename
, Qnil
);
3098 /* If the file name has special constructs in it,
3099 call the corresponding file handler. */
3100 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
3101 if (!NILP (handler
))
3102 return call2 (handler
, Qfile_readable_p
, absname
);
3104 absname
= ENCODE_FILE (absname
);
3106 #if defined(DOS_NT) || defined(macintosh)
3107 /* Under MS-DOS, Windows, and Macintosh, open does not work for
3109 if (access (SDATA (absname
), 0) == 0)
3112 #else /* not DOS_NT and not macintosh */
3114 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
3115 /* Opening a fifo without O_NONBLOCK can wait.
3116 We don't want to wait. But we don't want to mess wth O_NONBLOCK
3117 except in the case of a fifo, on a system which handles it. */
3118 desc
= stat (SDATA (absname
), &statbuf
);
3121 if (S_ISFIFO (statbuf
.st_mode
))
3122 flags
|= O_NONBLOCK
;
3124 desc
= emacs_open (SDATA (absname
), flags
, 0);
3129 #endif /* not DOS_NT and not macintosh */
3132 /* Having this before file-symlink-p mysteriously caused it to be forgotten
3134 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
3135 doc
: /* Return t if file FILENAME can be written or created by you. */)
3137 Lisp_Object filename
;
3139 Lisp_Object absname
, dir
, encoded
;
3140 Lisp_Object handler
;
3141 struct stat statbuf
;
3143 CHECK_STRING (filename
);
3144 absname
= Fexpand_file_name (filename
, Qnil
);
3146 /* If the file name has special constructs in it,
3147 call the corresponding file handler. */
3148 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
3149 if (!NILP (handler
))
3150 return call2 (handler
, Qfile_writable_p
, absname
);
3152 encoded
= ENCODE_FILE (absname
);
3153 if (stat (SDATA (encoded
), &statbuf
) >= 0)
3154 return (check_writable (SDATA (encoded
))
3157 dir
= Ffile_name_directory (absname
);
3160 dir
= Fdirectory_file_name (dir
);
3164 dir
= Fdirectory_file_name (dir
);
3167 dir
= ENCODE_FILE (dir
);
3169 /* The read-only attribute of the parent directory doesn't affect
3170 whether a file or directory can be created within it. Some day we
3171 should check ACLs though, which do affect this. */
3172 if (stat (SDATA (dir
), &statbuf
) < 0)
3174 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3176 return (check_writable (!NILP (dir
) ? (char *) SDATA (dir
) : "")
3181 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3182 doc
: /* Access file FILENAME, and get an error if that does not work.
3183 The second argument STRING is used in the error message.
3184 If there is no error, we return nil. */)
3186 Lisp_Object filename
, string
;
3188 Lisp_Object handler
, encoded_filename
, absname
;
3191 CHECK_STRING (filename
);
3192 absname
= Fexpand_file_name (filename
, Qnil
);
3194 CHECK_STRING (string
);
3196 /* If the file name has special constructs in it,
3197 call the corresponding file handler. */
3198 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
3199 if (!NILP (handler
))
3200 return call3 (handler
, Qaccess_file
, absname
, string
);
3202 encoded_filename
= ENCODE_FILE (absname
);
3204 fd
= emacs_open (SDATA (encoded_filename
), O_RDONLY
, 0);
3206 report_file_error (SDATA (string
), Fcons (filename
, Qnil
));
3212 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3213 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
3214 The value is the link target, as a string.
3215 Otherwise returns nil. */)
3217 Lisp_Object filename
;
3219 Lisp_Object handler
;
3221 CHECK_STRING (filename
);
3222 filename
= Fexpand_file_name (filename
, Qnil
);
3224 /* If the file name has special constructs in it,
3225 call the corresponding file handler. */
3226 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3227 if (!NILP (handler
))
3228 return call2 (handler
, Qfile_symlink_p
, filename
);
3237 filename
= ENCODE_FILE (filename
);
3244 buf
= (char *) xrealloc (buf
, bufsize
);
3245 bzero (buf
, bufsize
);
3248 valsize
= readlink (SDATA (filename
), buf
, bufsize
);
3252 /* HP-UX reports ERANGE if buffer is too small. */
3253 if (errno
== ERANGE
)
3263 while (valsize
>= bufsize
);
3265 val
= make_string (buf
, valsize
);
3266 if (buf
[0] == '/' && index (buf
, ':'))
3267 val
= concat2 (build_string ("/:"), val
);
3269 val
= DECODE_FILE (val
);
3272 #else /* not S_IFLNK */
3274 #endif /* not S_IFLNK */
3277 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3278 doc
: /* Return t if FILENAME names an existing directory.
3279 Symbolic links to directories count as directories.
3280 See `file-symlink-p' to distinguish symlinks. */)
3282 Lisp_Object filename
;
3284 register Lisp_Object absname
;
3286 Lisp_Object handler
;
3288 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3290 /* If the file name has special constructs in it,
3291 call the corresponding file handler. */
3292 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3293 if (!NILP (handler
))
3294 return call2 (handler
, Qfile_directory_p
, absname
);
3296 absname
= ENCODE_FILE (absname
);
3298 if (stat (SDATA (absname
), &st
) < 0)
3300 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3303 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3304 doc
: /* Return t if file FILENAME names a directory you can open.
3305 For the value to be t, FILENAME must specify the name of a directory as a file,
3306 and the directory must allow you to open files in it. In order to use a
3307 directory as a buffer's current directory, this predicate must return true.
3308 A directory name spec may be given instead; then the value is t
3309 if the directory so specified exists and really is a readable and
3310 searchable directory. */)
3312 Lisp_Object filename
;
3314 Lisp_Object handler
;
3316 struct gcpro gcpro1
;
3318 /* If the file name has special constructs in it,
3319 call the corresponding file handler. */
3320 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3321 if (!NILP (handler
))
3322 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3325 tem
= (NILP (Ffile_directory_p (filename
))
3326 || NILP (Ffile_executable_p (filename
)));
3328 return tem
? Qnil
: Qt
;
3331 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3332 doc
: /* Return t if file FILENAME is the name of a regular file.
3333 This is the sort of file that holds an ordinary stream of data bytes. */)
3335 Lisp_Object filename
;
3337 register Lisp_Object absname
;
3339 Lisp_Object handler
;
3341 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3343 /* If the file name has special constructs in it,
3344 call the corresponding file handler. */
3345 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3346 if (!NILP (handler
))
3347 return call2 (handler
, Qfile_regular_p
, absname
);
3349 absname
= ENCODE_FILE (absname
);
3354 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3356 /* Tell stat to use expensive method to get accurate info. */
3357 Vw32_get_true_file_attributes
= Qt
;
3358 result
= stat (SDATA (absname
), &st
);
3359 Vw32_get_true_file_attributes
= tem
;
3363 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3366 if (stat (SDATA (absname
), &st
) < 0)
3368 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3372 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3373 doc
: /* Return mode bits of file named FILENAME, as an integer.
3374 Return nil, if file does not exist or is not accessible. */)
3376 Lisp_Object filename
;
3378 Lisp_Object absname
;
3380 Lisp_Object handler
;
3382 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3384 /* If the file name has special constructs in it,
3385 call the corresponding file handler. */
3386 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3387 if (!NILP (handler
))
3388 return call2 (handler
, Qfile_modes
, absname
);
3390 absname
= ENCODE_FILE (absname
);
3392 if (stat (SDATA (absname
), &st
) < 0)
3394 #if defined (MSDOS) && __DJGPP__ < 2
3395 if (check_executable (SDATA (absname
)))
3396 st
.st_mode
|= S_IEXEC
;
3397 #endif /* MSDOS && __DJGPP__ < 2 */
3399 return make_number (st
.st_mode
& 07777);
3402 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3403 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
3404 Only the 12 low bits of MODE are used. */)
3406 Lisp_Object filename
, mode
;
3408 Lisp_Object absname
, encoded_absname
;
3409 Lisp_Object handler
;
3411 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3412 CHECK_NUMBER (mode
);
3414 /* If the file name has special constructs in it,
3415 call the corresponding file handler. */
3416 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3417 if (!NILP (handler
))
3418 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3420 encoded_absname
= ENCODE_FILE (absname
);
3422 if (chmod (SDATA (encoded_absname
), XINT (mode
)) < 0)
3423 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3428 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3429 doc
: /* Set the file permission bits for newly created files.
3430 The argument MODE should be an integer; only the low 9 bits are used.
3431 This setting is inherited by subprocesses. */)
3435 CHECK_NUMBER (mode
);
3437 umask ((~ XINT (mode
)) & 0777);
3442 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3443 doc
: /* Return the default file protection for created files.
3444 The value is an integer. */)
3450 realmask
= umask (0);
3453 XSETINT (value
, (~ realmask
) & 0777);
3457 extern int lisp_time_argument
P_ ((Lisp_Object
, time_t *, int *));
3459 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3460 doc
: /* Set times of file FILENAME to TIME.
3461 Set both access and modification times.
3462 Return t on success, else nil.
3463 Use the current time if TIME is nil. TIME is in the format of
3466 Lisp_Object filename
, time
;
3468 Lisp_Object absname
, encoded_absname
;
3469 Lisp_Object handler
;
3473 if (! lisp_time_argument (time
, &sec
, &usec
))
3474 error ("Invalid time specification");
3476 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3478 /* If the file name has special constructs in it,
3479 call the corresponding file handler. */
3480 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3481 if (!NILP (handler
))
3482 return call3 (handler
, Qset_file_times
, absname
, time
);
3484 encoded_absname
= ENCODE_FILE (absname
);
3489 EMACS_SET_SECS (t
, sec
);
3490 EMACS_SET_USECS (t
, usec
);
3492 if (set_file_times (SDATA (encoded_absname
), t
, t
))
3497 /* Setting times on a directory always fails. */
3498 if (stat (SDATA (encoded_absname
), &st
) == 0
3499 && (st
.st_mode
& S_IFMT
) == S_IFDIR
)
3502 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3515 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3516 doc
: /* Tell Unix to finish all pending disk updates. */)
3525 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3526 doc
: /* Return t if file FILE1 is newer than file FILE2.
3527 If FILE1 does not exist, the answer is nil;
3528 otherwise, if FILE2 does not exist, the answer is t. */)
3530 Lisp_Object file1
, file2
;
3532 Lisp_Object absname1
, absname2
;
3535 Lisp_Object handler
;
3536 struct gcpro gcpro1
, gcpro2
;
3538 CHECK_STRING (file1
);
3539 CHECK_STRING (file2
);
3542 GCPRO2 (absname1
, file2
);
3543 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3544 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3547 /* If the file name has special constructs in it,
3548 call the corresponding file handler. */
3549 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3551 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3552 if (!NILP (handler
))
3553 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3555 GCPRO2 (absname1
, absname2
);
3556 absname1
= ENCODE_FILE (absname1
);
3557 absname2
= ENCODE_FILE (absname2
);
3560 if (stat (SDATA (absname1
), &st
) < 0)
3563 mtime1
= st
.st_mtime
;
3565 if (stat (SDATA (absname2
), &st
) < 0)
3568 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3572 Lisp_Object Qfind_buffer_file_type
;
3575 #ifndef READ_BUF_SIZE
3576 #define READ_BUF_SIZE (64 << 10)
3579 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3581 /* This function is called after Lisp functions to decide a coding
3582 system are called, or when they cause an error. Before they are
3583 called, the current buffer is set unibyte and it contains only a
3584 newly inserted text (thus the buffer was empty before the
3587 The functions may set markers, overlays, text properties, or even
3588 alter the buffer contents, change the current buffer.
3590 Here, we reset all those changes by:
3591 o set back the current buffer.
3592 o move all markers and overlays to BEG.
3593 o remove all text properties.
3594 o set back the buffer multibyteness. */
3597 decide_coding_unwind (unwind_data
)
3598 Lisp_Object unwind_data
;
3600 Lisp_Object multibyte
, undo_list
, buffer
;
3602 multibyte
= XCAR (unwind_data
);
3603 unwind_data
= XCDR (unwind_data
);
3604 undo_list
= XCAR (unwind_data
);
3605 buffer
= XCDR (unwind_data
);
3607 if (current_buffer
!= XBUFFER (buffer
))
3608 set_buffer_internal (XBUFFER (buffer
));
3609 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3610 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3611 BUF_INTERVALS (current_buffer
) = 0;
3612 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3614 /* Now we are safe to change the buffer's multibyteness directly. */
3615 current_buffer
->enable_multibyte_characters
= multibyte
;
3616 current_buffer
->undo_list
= undo_list
;
3622 /* Used to pass values from insert-file-contents to read_non_regular. */
3624 static int non_regular_fd
;
3625 static int non_regular_inserted
;
3626 static int non_regular_nbytes
;
3629 /* Read from a non-regular file.
3630 Read non_regular_trytry bytes max from non_regular_fd.
3631 Non_regular_inserted specifies where to put the read bytes.
3632 Value is the number of bytes read. */
3641 nbytes
= emacs_read (non_regular_fd
,
3642 BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ non_regular_inserted
,
3643 non_regular_nbytes
);
3645 return make_number (nbytes
);
3649 /* Condition-case handler used when reading from non-regular files
3650 in insert-file-contents. */
3653 read_non_regular_quit ()
3659 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3661 doc
: /* Insert contents of file FILENAME after point.
3662 Returns list of absolute file name and number of characters inserted.
3663 If second argument VISIT is non-nil, the buffer's visited filename
3664 and last save file modtime are set, and it is marked unmodified.
3665 If visiting and the file does not exist, visiting is completed
3666 before the error is signaled.
3667 The optional third and fourth arguments BEG and END
3668 specify what portion of the file to insert.
3669 These arguments count bytes in the file, not characters in the buffer.
3670 If VISIT is non-nil, BEG and END must be nil.
3672 If optional fifth argument REPLACE is non-nil,
3673 it means replace the current buffer contents (in the accessible portion)
3674 with the file contents. This is better than simply deleting and inserting
3675 the whole thing because (1) it preserves some marker positions
3676 and (2) it puts less data in the undo list.
3677 When REPLACE is non-nil, the value is the number of characters actually read,
3678 which is often less than the number of characters to be read.
3680 This does code conversion according to the value of
3681 `coding-system-for-read' or `file-coding-system-alist',
3682 and sets the variable `last-coding-system-used' to the coding system
3684 (filename
, visit
, beg
, end
, replace
)
3685 Lisp_Object filename
, visit
, beg
, end
, replace
;
3690 register int how_much
;
3691 register int unprocessed
;
3692 int count
= SPECPDL_INDEX ();
3693 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3694 Lisp_Object handler
, val
, insval
, orig_filename
;
3697 int not_regular
= 0;
3698 unsigned char read_buf
[READ_BUF_SIZE
];
3699 struct coding_system coding
;
3700 unsigned char buffer
[1 << 14];
3701 int replace_handled
= 0;
3702 int set_coding_system
= 0;
3703 int coding_system_decided
= 0;
3706 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3707 error ("Cannot do file visiting in an indirect buffer");
3709 if (!NILP (current_buffer
->read_only
))
3710 Fbarf_if_buffer_read_only ();
3714 orig_filename
= Qnil
;
3716 GCPRO4 (filename
, val
, p
, orig_filename
);
3718 CHECK_STRING (filename
);
3719 filename
= Fexpand_file_name (filename
, Qnil
);
3721 /* If the file name has special constructs in it,
3722 call the corresponding file handler. */
3723 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3724 if (!NILP (handler
))
3726 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3727 visit
, beg
, end
, replace
);
3728 if (CONSP (val
) && CONSP (XCDR (val
)))
3729 inserted
= XINT (XCAR (XCDR (val
)));
3733 orig_filename
= filename
;
3734 filename
= ENCODE_FILE (filename
);
3740 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3742 /* Tell stat to use expensive method to get accurate info. */
3743 Vw32_get_true_file_attributes
= Qt
;
3744 total
= stat (SDATA (filename
), &st
);
3745 Vw32_get_true_file_attributes
= tem
;
3750 if (stat (SDATA (filename
), &st
) < 0)
3752 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0
3753 || fstat (fd
, &st
) < 0)
3754 #endif /* not APOLLO */
3755 #endif /* WINDOWSNT */
3757 if (fd
>= 0) emacs_close (fd
);
3760 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3763 if (!NILP (Vcoding_system_for_read
))
3764 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3769 /* This code will need to be changed in order to work on named
3770 pipes, and it's probably just not worth it. So we should at
3771 least signal an error. */
3772 if (!S_ISREG (st
.st_mode
))
3779 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3780 Fsignal (Qfile_error
,
3781 Fcons (build_string ("not a regular file"),
3782 Fcons (orig_filename
, Qnil
)));
3787 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0)
3790 /* Replacement should preserve point as it preserves markers. */
3791 if (!NILP (replace
))
3792 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3794 record_unwind_protect (close_file_unwind
, make_number (fd
));
3796 /* Supposedly happens on VMS. */
3797 /* Can happen on any platform that uses long as type of off_t, but allows
3798 file sizes to exceed 2Gb. VMS is no longer officially supported, so
3799 give a message suitable for the latter case. */
3800 if (! not_regular
&& st
.st_size
< 0)
3801 error ("Maximum buffer size exceeded");
3803 /* Prevent redisplay optimizations. */
3804 current_buffer
->clip_changed
= 1;
3808 if (!NILP (beg
) || !NILP (end
))
3809 error ("Attempt to visit less than an entire file");
3810 if (BEG
< Z
&& NILP (replace
))
3811 error ("Cannot do file visiting in a non-empty buffer");
3817 XSETFASTINT (beg
, 0);
3825 XSETINT (end
, st
.st_size
);
3827 /* Arithmetic overflow can occur if an Emacs integer cannot
3828 represent the file size, or if the calculations below
3829 overflow. The calculations below double the file size
3830 twice, so check that it can be multiplied by 4 safely. */
3831 if (XINT (end
) != st
.st_size
3832 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3833 error ("Maximum buffer size exceeded");
3835 /* The file size returned from stat may be zero, but data
3836 may be readable nonetheless, for example when this is a
3837 file in the /proc filesystem. */
3838 if (st
.st_size
== 0)
3839 XSETINT (end
, READ_BUF_SIZE
);
3843 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3845 /* We use emacs-mule for auto saving... */
3846 setup_coding_system (Qemacs_mule
, &coding
);
3847 /* ... but with the special flag to indicate to read in a
3848 multibyte sequence for eight-bit-control char as is. */
3850 coding
.src_multibyte
= 0;
3851 coding
.dst_multibyte
3852 = !NILP (current_buffer
->enable_multibyte_characters
);
3853 coding
.eol_type
= CODING_EOL_LF
;
3854 coding_system_decided
= 1;
3858 /* Decide the coding system to use for reading the file now
3859 because we can't use an optimized method for handling
3860 `coding:' tag if the current buffer is not empty. */
3864 if (!NILP (Vcoding_system_for_read
))
3865 val
= Vcoding_system_for_read
;
3868 /* Don't try looking inside a file for a coding system
3869 specification if it is not seekable. */
3870 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3872 /* Find a coding system specified in the heading two
3873 lines or in the tailing several lines of the file.
3874 We assume that the 1K-byte and 3K-byte for heading
3875 and tailing respectively are sufficient for this
3879 if (st
.st_size
<= (1024 * 4))
3880 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3883 nread
= emacs_read (fd
, read_buf
, 1024);
3886 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3887 report_file_error ("Setting file position",
3888 Fcons (orig_filename
, Qnil
));
3889 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3894 error ("IO error reading %s: %s",
3895 SDATA (orig_filename
), emacs_strerror (errno
));
3898 struct buffer
*prev
= current_buffer
;
3902 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3904 buffer
= Fget_buffer_create (build_string (" *code-converting-work*"));
3905 buf
= XBUFFER (buffer
);
3907 delete_all_overlays (buf
);
3908 buf
->directory
= current_buffer
->directory
;
3909 buf
->read_only
= Qnil
;
3910 buf
->filename
= Qnil
;
3911 buf
->undo_list
= Qt
;
3912 eassert (buf
->overlays_before
== NULL
);
3913 eassert (buf
->overlays_after
== NULL
);
3915 set_buffer_internal (buf
);
3917 buf
->enable_multibyte_characters
= Qnil
;
3919 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3920 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3921 val
= call2 (Vset_auto_coding_function
,
3922 filename
, make_number (nread
));
3923 set_buffer_internal (prev
);
3925 /* Discard the unwind protect for recovering the
3929 /* Rewind the file for the actual read done later. */
3930 if (lseek (fd
, 0, 0) < 0)
3931 report_file_error ("Setting file position",
3932 Fcons (orig_filename
, Qnil
));
3938 /* If we have not yet decided a coding system, check
3939 file-coding-system-alist. */
3940 Lisp_Object args
[6], coding_systems
;
3942 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3943 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3944 coding_systems
= Ffind_operation_coding_system (6, args
);
3945 if (CONSP (coding_systems
))
3946 val
= XCAR (coding_systems
);
3950 setup_coding_system (Fcheck_coding_system (val
), &coding
);
3951 /* Ensure we set Vlast_coding_system_used. */
3952 set_coding_system
= 1;
3954 if (NILP (current_buffer
->enable_multibyte_characters
)
3956 /* We must suppress all character code conversion except for
3957 end-of-line conversion. */
3958 setup_raw_text_coding_system (&coding
);
3960 coding
.src_multibyte
= 0;
3961 coding
.dst_multibyte
3962 = !NILP (current_buffer
->enable_multibyte_characters
);
3963 coding_system_decided
= 1;
3966 /* If requested, replace the accessible part of the buffer
3967 with the file contents. Avoid replacing text at the
3968 beginning or end of the buffer that matches the file contents;
3969 that preserves markers pointing to the unchanged parts.
3971 Here we implement this feature in an optimized way
3972 for the case where code conversion is NOT needed.
3973 The following if-statement handles the case of conversion
3974 in a less optimal way.
3976 If the code conversion is "automatic" then we try using this
3977 method and hope for the best.
3978 But if we discover the need for conversion, we give up on this method
3979 and let the following if-statement handle the replace job. */
3982 && !(coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
))
3984 /* same_at_start and same_at_end count bytes,
3985 because file access counts bytes
3986 and BEG and END count bytes. */
3987 int same_at_start
= BEGV_BYTE
;
3988 int same_at_end
= ZV_BYTE
;
3990 /* There is still a possibility we will find the need to do code
3991 conversion. If that happens, we set this variable to 1 to
3992 give up on handling REPLACE in the optimized way. */
3993 int giveup_match_end
= 0;
3995 if (XINT (beg
) != 0)
3997 if (lseek (fd
, XINT (beg
), 0) < 0)
3998 report_file_error ("Setting file position",
3999 Fcons (orig_filename
, Qnil
));
4004 /* Count how many chars at the start of the file
4005 match the text at the beginning of the buffer. */
4010 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
4012 error ("IO error reading %s: %s",
4013 SDATA (orig_filename
), emacs_strerror (errno
));
4014 else if (nread
== 0)
4017 if (coding
.type
== coding_type_undecided
)
4018 detect_coding (&coding
, buffer
, nread
);
4019 if (coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
)
4020 /* We found that the file should be decoded somehow.
4021 Let's give up here. */
4023 giveup_match_end
= 1;
4027 if (coding
.eol_type
== CODING_EOL_UNDECIDED
)
4028 detect_eol (&coding
, buffer
, nread
);
4029 if (coding
.eol_type
!= CODING_EOL_UNDECIDED
4030 && coding
.eol_type
!= CODING_EOL_LF
)
4031 /* We found that the format of eol should be decoded.
4032 Let's give up here. */
4034 giveup_match_end
= 1;
4039 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
4040 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
4041 same_at_start
++, bufpos
++;
4042 /* If we found a discrepancy, stop the scan.
4043 Otherwise loop around and scan the next bufferful. */
4044 if (bufpos
!= nread
)
4048 /* If the file matches the buffer completely,
4049 there's no need to replace anything. */
4050 if (same_at_start
- BEGV_BYTE
== XINT (end
))
4054 /* Truncate the buffer to the size of the file. */
4055 del_range_1 (same_at_start
, same_at_end
, 0, 0);
4060 /* Count how many chars at the end of the file
4061 match the text at the end of the buffer. But, if we have
4062 already found that decoding is necessary, don't waste time. */
4063 while (!giveup_match_end
)
4065 int total_read
, nread
, bufpos
, curpos
, trial
;
4067 /* At what file position are we now scanning? */
4068 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
4069 /* If the entire file matches the buffer tail, stop the scan. */
4072 /* How much can we scan in the next step? */
4073 trial
= min (curpos
, sizeof buffer
);
4074 if (lseek (fd
, curpos
- trial
, 0) < 0)
4075 report_file_error ("Setting file position",
4076 Fcons (orig_filename
, Qnil
));
4078 total_read
= nread
= 0;
4079 while (total_read
< trial
)
4081 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
4083 error ("IO error reading %s: %s",
4084 SDATA (orig_filename
), emacs_strerror (errno
));
4085 else if (nread
== 0)
4087 total_read
+= nread
;
4090 /* Scan this bufferful from the end, comparing with
4091 the Emacs buffer. */
4092 bufpos
= total_read
;
4094 /* Compare with same_at_start to avoid counting some buffer text
4095 as matching both at the file's beginning and at the end. */
4096 while (bufpos
> 0 && same_at_end
> same_at_start
4097 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
4098 same_at_end
--, bufpos
--;
4100 /* If we found a discrepancy, stop the scan.
4101 Otherwise loop around and scan the preceding bufferful. */
4104 /* If this discrepancy is because of code conversion,
4105 we cannot use this method; giveup and try the other. */
4106 if (same_at_end
> same_at_start
4107 && FETCH_BYTE (same_at_end
- 1) >= 0200
4108 && ! NILP (current_buffer
->enable_multibyte_characters
)
4109 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
4110 giveup_match_end
= 1;
4119 if (! giveup_match_end
)
4123 /* We win! We can handle REPLACE the optimized way. */
4125 /* Extend the start of non-matching text area to multibyte
4126 character boundary. */
4127 if (! NILP (current_buffer
->enable_multibyte_characters
))
4128 while (same_at_start
> BEGV_BYTE
4129 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4132 /* Extend the end of non-matching text area to multibyte
4133 character boundary. */
4134 if (! NILP (current_buffer
->enable_multibyte_characters
))
4135 while (same_at_end
< ZV_BYTE
4136 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4139 /* Don't try to reuse the same piece of text twice. */
4140 overlap
= (same_at_start
- BEGV_BYTE
4141 - (same_at_end
+ st
.st_size
- ZV
));
4143 same_at_end
+= overlap
;
4145 /* Arrange to read only the nonmatching middle part of the file. */
4146 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
4147 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
4149 del_range_byte (same_at_start
, same_at_end
, 0);
4150 /* Insert from the file at the proper position. */
4151 temp
= BYTE_TO_CHAR (same_at_start
);
4152 SET_PT_BOTH (temp
, same_at_start
);
4154 /* If display currently starts at beginning of line,
4155 keep it that way. */
4156 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4157 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4159 replace_handled
= 1;
4163 /* If requested, replace the accessible part of the buffer
4164 with the file contents. Avoid replacing text at the
4165 beginning or end of the buffer that matches the file contents;
4166 that preserves markers pointing to the unchanged parts.
4168 Here we implement this feature for the case where code conversion
4169 is needed, in a simple way that needs a lot of memory.
4170 The preceding if-statement handles the case of no conversion
4171 in a more optimized way. */
4172 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
4174 int same_at_start
= BEGV_BYTE
;
4175 int same_at_end
= ZV_BYTE
;
4178 /* Make sure that the gap is large enough. */
4179 int bufsize
= 2 * st
.st_size
;
4180 unsigned char *conversion_buffer
= (unsigned char *) xmalloc (bufsize
);
4183 /* First read the whole file, performing code conversion into
4184 CONVERSION_BUFFER. */
4186 if (lseek (fd
, XINT (beg
), 0) < 0)
4188 xfree (conversion_buffer
);
4189 report_file_error ("Setting file position",
4190 Fcons (orig_filename
, Qnil
));
4193 total
= st
.st_size
; /* Total bytes in the file. */
4194 how_much
= 0; /* Bytes read from file so far. */
4195 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
4196 unprocessed
= 0; /* Bytes not processed in previous loop. */
4198 while (how_much
< total
)
4200 /* try is reserved in some compilers (Microsoft C) */
4201 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
4202 unsigned char *destination
= read_buf
+ unprocessed
;
4205 /* Allow quitting out of the actual I/O. */
4208 this = emacs_read (fd
, destination
, trytry
);
4211 if (this < 0 || this + unprocessed
== 0)
4219 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4221 int require
, result
;
4223 this += unprocessed
;
4225 /* If we are using more space than estimated,
4226 make CONVERSION_BUFFER bigger. */
4227 require
= decoding_buffer_size (&coding
, this);
4228 if (inserted
+ require
+ 2 * (total
- how_much
) > bufsize
)
4230 bufsize
= inserted
+ require
+ 2 * (total
- how_much
);
4231 conversion_buffer
= (unsigned char *) xrealloc (conversion_buffer
, bufsize
);
4234 /* Convert this batch with results in CONVERSION_BUFFER. */
4235 if (how_much
>= total
) /* This is the last block. */
4236 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4237 if (coding
.composing
!= COMPOSITION_DISABLED
)
4238 coding_allocate_composition_data (&coding
, BEGV
);
4239 result
= decode_coding (&coding
, read_buf
,
4240 conversion_buffer
+ inserted
,
4241 this, bufsize
- inserted
);
4243 /* Save for next iteration whatever we didn't convert. */
4244 unprocessed
= this - coding
.consumed
;
4245 bcopy (read_buf
+ coding
.consumed
, read_buf
, unprocessed
);
4246 if (!NILP (current_buffer
->enable_multibyte_characters
))
4247 this = coding
.produced
;
4249 this = str_as_unibyte (conversion_buffer
+ inserted
,
4256 /* At this point, INSERTED is how many characters (i.e. bytes)
4257 are present in CONVERSION_BUFFER.
4258 HOW_MUCH should equal TOTAL,
4259 or should be <= 0 if we couldn't read the file. */
4263 xfree (conversion_buffer
);
4264 coding_free_composition_data (&coding
);
4266 error ("IO error reading %s: %s",
4267 SDATA (orig_filename
), emacs_strerror (errno
));
4268 else if (how_much
== -2)
4269 error ("maximum buffer size exceeded");
4272 /* Compare the beginning of the converted file
4273 with the buffer text. */
4276 while (bufpos
< inserted
&& same_at_start
< same_at_end
4277 && FETCH_BYTE (same_at_start
) == conversion_buffer
[bufpos
])
4278 same_at_start
++, bufpos
++;
4280 /* If the file matches the buffer completely,
4281 there's no need to replace anything. */
4283 if (bufpos
== inserted
)
4285 xfree (conversion_buffer
);
4286 coding_free_composition_data (&coding
);
4289 /* Truncate the buffer to the size of the file. */
4290 del_range_byte (same_at_start
, same_at_end
, 0);
4295 /* Extend the start of non-matching text area to multibyte
4296 character boundary. */
4297 if (! NILP (current_buffer
->enable_multibyte_characters
))
4298 while (same_at_start
> BEGV_BYTE
4299 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4302 /* Scan this bufferful from the end, comparing with
4303 the Emacs buffer. */
4306 /* Compare with same_at_start to avoid counting some buffer text
4307 as matching both at the file's beginning and at the end. */
4308 while (bufpos
> 0 && same_at_end
> same_at_start
4309 && FETCH_BYTE (same_at_end
- 1) == conversion_buffer
[bufpos
- 1])
4310 same_at_end
--, bufpos
--;
4312 /* Extend the end of non-matching text area to multibyte
4313 character boundary. */
4314 if (! NILP (current_buffer
->enable_multibyte_characters
))
4315 while (same_at_end
< ZV_BYTE
4316 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4319 /* Don't try to reuse the same piece of text twice. */
4320 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4322 same_at_end
+= overlap
;
4324 /* If display currently starts at beginning of line,
4325 keep it that way. */
4326 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4327 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4329 /* Replace the chars that we need to replace,
4330 and update INSERTED to equal the number of bytes
4331 we are taking from the file. */
4332 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
4334 if (same_at_end
!= same_at_start
)
4336 del_range_byte (same_at_start
, same_at_end
, 0);
4338 same_at_start
= GPT_BYTE
;
4342 temp
= BYTE_TO_CHAR (same_at_start
);
4344 /* Insert from the file at the proper position. */
4345 SET_PT_BOTH (temp
, same_at_start
);
4346 insert_1 (conversion_buffer
+ same_at_start
- BEGV_BYTE
, inserted
,
4348 if (coding
.cmp_data
&& coding
.cmp_data
->used
)
4349 coding_restore_composition (&coding
, Fcurrent_buffer ());
4350 coding_free_composition_data (&coding
);
4352 /* Set `inserted' to the number of inserted characters. */
4353 inserted
= PT
- temp
;
4355 xfree (conversion_buffer
);
4364 register Lisp_Object temp
;
4366 total
= XINT (end
) - XINT (beg
);
4368 /* Make sure point-max won't overflow after this insertion. */
4369 XSETINT (temp
, total
);
4370 if (total
!= XINT (temp
))
4371 error ("Maximum buffer size exceeded");
4374 /* For a special file, all we can do is guess. */
4375 total
= READ_BUF_SIZE
;
4377 if (NILP (visit
) && total
> 0)
4378 prepare_to_modify_buffer (PT
, PT
, NULL
);
4381 if (GAP_SIZE
< total
)
4382 make_gap (total
- GAP_SIZE
);
4384 if (XINT (beg
) != 0 || !NILP (replace
))
4386 if (lseek (fd
, XINT (beg
), 0) < 0)
4387 report_file_error ("Setting file position",
4388 Fcons (orig_filename
, Qnil
));
4391 /* In the following loop, HOW_MUCH contains the total bytes read so
4392 far for a regular file, and not changed for a special file. But,
4393 before exiting the loop, it is set to a negative value if I/O
4397 /* Total bytes inserted. */
4400 /* Here, we don't do code conversion in the loop. It is done by
4401 code_convert_region after all data are read into the buffer. */
4403 int gap_size
= GAP_SIZE
;
4405 while (how_much
< total
)
4407 /* try is reserved in some compilers (Microsoft C) */
4408 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4415 /* Maybe make more room. */
4416 if (gap_size
< trytry
)
4418 make_gap (total
- gap_size
);
4419 gap_size
= GAP_SIZE
;
4422 /* Read from the file, capturing `quit'. When an
4423 error occurs, end the loop, and arrange for a quit
4424 to be signaled after decoding the text we read. */
4425 non_regular_fd
= fd
;
4426 non_regular_inserted
= inserted
;
4427 non_regular_nbytes
= trytry
;
4428 val
= internal_condition_case_1 (read_non_regular
, Qnil
, Qerror
,
4429 read_non_regular_quit
);
4440 /* Allow quitting out of the actual I/O. We don't make text
4441 part of the buffer until all the reading is done, so a C-g
4442 here doesn't do any harm. */
4445 this = emacs_read (fd
, BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ inserted
, trytry
);
4457 /* For a regular file, where TOTAL is the real size,
4458 count HOW_MUCH to compare with it.
4459 For a special file, where TOTAL is just a buffer size,
4460 so don't bother counting in HOW_MUCH.
4461 (INSERTED is where we count the number of characters inserted.) */
4468 /* Make the text read part of the buffer. */
4469 GAP_SIZE
-= inserted
;
4471 GPT_BYTE
+= inserted
;
4473 ZV_BYTE
+= inserted
;
4478 /* Put an anchor to ensure multi-byte form ends at gap. */
4483 /* Discard the unwind protect for closing the file. */
4487 error ("IO error reading %s: %s",
4488 SDATA (orig_filename
), emacs_strerror (errno
));
4492 if (! coding_system_decided
)
4494 /* The coding system is not yet decided. Decide it by an
4495 optimized method for handling `coding:' tag.
4497 Note that we can get here only if the buffer was empty
4498 before the insertion. */
4502 if (!NILP (Vcoding_system_for_read
))
4503 val
= Vcoding_system_for_read
;
4506 /* Since we are sure that the current buffer was empty
4507 before the insertion, we can toggle
4508 enable-multibyte-characters directly here without taking
4509 care of marker adjustment and byte combining problem. By
4510 this way, we can run Lisp program safely before decoding
4511 the inserted text. */
4512 Lisp_Object unwind_data
;
4513 int count
= SPECPDL_INDEX ();
4515 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4516 Fcons (current_buffer
->undo_list
,
4517 Fcurrent_buffer ()));
4518 current_buffer
->enable_multibyte_characters
= Qnil
;
4519 current_buffer
->undo_list
= Qt
;
4520 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4522 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4524 val
= call2 (Vset_auto_coding_function
,
4525 filename
, make_number (inserted
));
4530 /* If the coding system is not yet decided, check
4531 file-coding-system-alist. */
4532 Lisp_Object args
[6], coding_systems
;
4534 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4535 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4536 coding_systems
= Ffind_operation_coding_system (6, args
);
4537 if (CONSP (coding_systems
))
4538 val
= XCAR (coding_systems
);
4540 unbind_to (count
, Qnil
);
4541 inserted
= Z_BYTE
- BEG_BYTE
;
4544 /* The following kludgy code is to avoid some compiler bug.
4546 setup_coding_system (val, &coding);
4549 struct coding_system temp_coding
;
4550 setup_coding_system (Fcheck_coding_system (val
), &temp_coding
);
4551 bcopy (&temp_coding
, &coding
, sizeof coding
);
4553 /* Ensure we set Vlast_coding_system_used. */
4554 set_coding_system
= 1;
4556 if (NILP (current_buffer
->enable_multibyte_characters
)
4558 /* We must suppress all character code conversion except for
4559 end-of-line conversion. */
4560 setup_raw_text_coding_system (&coding
);
4561 coding
.src_multibyte
= 0;
4562 coding
.dst_multibyte
4563 = !NILP (current_buffer
->enable_multibyte_characters
);
4567 /* Can't do this if part of the buffer might be preserved. */
4569 && (coding
.type
== coding_type_no_conversion
4570 || coding
.type
== coding_type_raw_text
))
4572 /* Visiting a file with these coding system makes the buffer
4574 current_buffer
->enable_multibyte_characters
= Qnil
;
4575 coding
.dst_multibyte
= 0;
4578 if (inserted
> 0 || coding
.type
== coding_type_ccl
)
4580 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4582 code_convert_region (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4584 inserted
= coding
.produced_char
;
4587 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4591 /* Now INSERTED is measured in characters. */
4594 /* Use the conversion type to determine buffer-file-type
4595 (find-buffer-file-type is now used to help determine the
4597 if ((coding
.eol_type
== CODING_EOL_UNDECIDED
4598 || coding
.eol_type
== CODING_EOL_LF
)
4599 && ! CODING_REQUIRE_DECODING (&coding
))
4600 current_buffer
->buffer_file_type
= Qt
;
4602 current_buffer
->buffer_file_type
= Qnil
;
4609 if (!EQ (current_buffer
->undo_list
, Qt
))
4610 current_buffer
->undo_list
= Qnil
;
4612 stat (SDATA (filename
), &st
);
4617 current_buffer
->modtime
= st
.st_mtime
;
4618 current_buffer
->filename
= orig_filename
;
4621 SAVE_MODIFF
= MODIFF
;
4622 current_buffer
->auto_save_modified
= MODIFF
;
4623 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4624 #ifdef CLASH_DETECTION
4627 if (!NILP (current_buffer
->file_truename
))
4628 unlock_file (current_buffer
->file_truename
);
4629 unlock_file (filename
);
4631 #endif /* CLASH_DETECTION */
4633 Fsignal (Qfile_error
,
4634 Fcons (build_string ("not a regular file"),
4635 Fcons (orig_filename
, Qnil
)));
4638 if (set_coding_system
)
4639 Vlast_coding_system_used
= coding
.symbol
;
4641 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4643 insval
= call2 (Qafter_insert_file_set_coding
, make_number (inserted
),
4645 if (! NILP (insval
))
4647 CHECK_NUMBER (insval
);
4648 inserted
= XFASTINT (insval
);
4652 /* Decode file format */
4655 int empty_undo_list_p
= 0;
4657 /* If we're anyway going to discard undo information, don't
4658 record it in the first place. The buffer's undo list at this
4659 point is either nil or t when visiting a file. */
4662 empty_undo_list_p
= NILP (current_buffer
->undo_list
);
4663 current_buffer
->undo_list
= Qt
;
4666 insval
= call3 (Qformat_decode
,
4667 Qnil
, make_number (inserted
), visit
);
4668 CHECK_NUMBER (insval
);
4669 inserted
= XFASTINT (insval
);
4672 current_buffer
->undo_list
= empty_undo_list_p
? Qnil
: Qt
;
4675 /* Call after-change hooks for the inserted text, aside from the case
4676 of normal visiting (not with REPLACE), which is done in a new buffer
4677 "before" the buffer is changed. */
4678 if (inserted
> 0 && total
> 0
4679 && (NILP (visit
) || !NILP (replace
)))
4681 signal_after_change (PT
, 0, inserted
);
4682 update_compositions (PT
, PT
, CHECK_BORDER
);
4685 p
= Vafter_insert_file_functions
;
4688 insval
= call1 (XCAR (p
), make_number (inserted
));
4691 CHECK_NUMBER (insval
);
4692 inserted
= XFASTINT (insval
);
4699 && current_buffer
->modtime
== -1)
4701 /* If visiting nonexistent file, return nil. */
4702 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4706 Fsignal (Qquit
, Qnil
);
4708 /* ??? Retval needs to be dealt with in all cases consistently. */
4710 val
= Fcons (orig_filename
,
4711 Fcons (make_number (inserted
),
4714 RETURN_UNGCPRO (unbind_to (count
, val
));
4717 static Lisp_Object build_annotations
P_ ((Lisp_Object
, Lisp_Object
));
4718 static Lisp_Object build_annotations_2
P_ ((Lisp_Object
, Lisp_Object
,
4719 Lisp_Object
, Lisp_Object
));
4721 /* If build_annotations switched buffers, switch back to BUF.
4722 Kill the temporary buffer that was selected in the meantime.
4724 Since this kill only the last temporary buffer, some buffers remain
4725 not killed if build_annotations switched buffers more than once.
4729 build_annotations_unwind (buf
)
4734 if (XBUFFER (buf
) == current_buffer
)
4736 tembuf
= Fcurrent_buffer ();
4738 Fkill_buffer (tembuf
);
4742 /* Decide the coding-system to encode the data with. */
4745 choose_write_coding_system (start
, end
, filename
,
4746 append
, visit
, lockname
, coding
)
4747 Lisp_Object start
, end
, filename
, append
, visit
, lockname
;
4748 struct coding_system
*coding
;
4753 && NILP (Fstring_equal (current_buffer
->filename
,
4754 current_buffer
->auto_save_file_name
)))
4756 /* We use emacs-mule for auto saving... */
4757 setup_coding_system (Qemacs_mule
, coding
);
4758 /* ... but with the special flag to indicate not to strip off
4759 leading code of eight-bit-control chars. */
4761 goto done_setup_coding
;
4763 else if (!NILP (Vcoding_system_for_write
))
4765 val
= Vcoding_system_for_write
;
4766 if (coding_system_require_warning
4767 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4768 /* Confirm that VAL can surely encode the current region. */
4769 val
= call5 (Vselect_safe_coding_system_function
,
4770 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4775 /* If the variable `buffer-file-coding-system' is set locally,
4776 it means that the file was read with some kind of code
4777 conversion or the variable is explicitly set by users. We
4778 had better write it out with the same coding system even if
4779 `enable-multibyte-characters' is nil.
4781 If it is not set locally, we anyway have to convert EOL
4782 format if the default value of `buffer-file-coding-system'
4783 tells that it is not Unix-like (LF only) format. */
4784 int using_default_coding
= 0;
4785 int force_raw_text
= 0;
4787 val
= current_buffer
->buffer_file_coding_system
;
4789 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4792 if (NILP (current_buffer
->enable_multibyte_characters
))
4798 /* Check file-coding-system-alist. */
4799 Lisp_Object args
[7], coding_systems
;
4801 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4802 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4804 coding_systems
= Ffind_operation_coding_system (7, args
);
4805 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4806 val
= XCDR (coding_systems
);
4810 && !NILP (current_buffer
->buffer_file_coding_system
))
4812 /* If we still have not decided a coding system, use the
4813 default value of buffer-file-coding-system. */
4814 val
= current_buffer
->buffer_file_coding_system
;
4815 using_default_coding
= 1;
4819 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4820 /* Confirm that VAL can surely encode the current region. */
4821 val
= call5 (Vselect_safe_coding_system_function
,
4822 start
, end
, val
, Qnil
, filename
);
4824 setup_coding_system (Fcheck_coding_system (val
), coding
);
4825 if (coding
->eol_type
== CODING_EOL_UNDECIDED
4826 && !using_default_coding
)
4828 if (! EQ (default_buffer_file_coding
.symbol
,
4829 buffer_defaults
.buffer_file_coding_system
))
4830 setup_coding_system (buffer_defaults
.buffer_file_coding_system
,
4831 &default_buffer_file_coding
);
4832 if (default_buffer_file_coding
.eol_type
!= CODING_EOL_UNDECIDED
)
4834 Lisp_Object subsidiaries
;
4836 coding
->eol_type
= default_buffer_file_coding
.eol_type
;
4837 subsidiaries
= Fget (coding
->symbol
, Qeol_type
);
4838 if (VECTORP (subsidiaries
)
4839 && XVECTOR (subsidiaries
)->size
== 3)
4841 = XVECTOR (subsidiaries
)->contents
[coding
->eol_type
];
4846 setup_raw_text_coding_system (coding
);
4847 goto done_setup_coding
;
4850 setup_coding_system (Fcheck_coding_system (val
), coding
);
4853 if (!STRINGP (start
) && !NILP (current_buffer
->selective_display
))
4854 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4857 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4858 "r\nFWrite region to file: \ni\ni\ni\np",
4859 doc
: /* Write current region into specified file.
4860 When called from a program, requires three arguments:
4861 START, END and FILENAME. START and END are normally buffer positions
4862 specifying the part of the buffer to write.
4863 If START is nil, that means to use the entire buffer contents.
4864 If START is a string, then output that string to the file
4865 instead of any buffer contents; END is ignored.
4867 Optional fourth argument APPEND if non-nil means
4868 append to existing file contents (if any). If it is an integer,
4869 seek to that offset in the file before writing.
4870 Optional fifth argument VISIT, if t or a string, means
4871 set the last-save-file-modtime of buffer to this file's modtime
4872 and mark buffer not modified.
4873 If VISIT is a string, it is a second file name;
4874 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4875 VISIT is also the file name to lock and unlock for clash detection.
4876 If VISIT is neither t nor nil nor a string,
4877 that means do not display the \"Wrote file\" message.
4878 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4879 use for locking and unlocking, overriding FILENAME and VISIT.
4880 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4881 for an existing file with the same name. If MUSTBENEW is `excl',
4882 that means to get an error if the file already exists; never overwrite.
4883 If MUSTBENEW is neither nil nor `excl', that means ask for
4884 confirmation before overwriting, but do go ahead and overwrite the file
4885 if the user confirms.
4887 This does code conversion according to the value of
4888 `coding-system-for-write', `buffer-file-coding-system', or
4889 `file-coding-system-alist', and sets the variable
4890 `last-coding-system-used' to the coding system actually used. */)
4891 (start
, end
, filename
, append
, visit
, lockname
, mustbenew
)
4892 Lisp_Object start
, end
, filename
, append
, visit
, lockname
, mustbenew
;
4897 const unsigned char *fn
;
4900 int count
= SPECPDL_INDEX ();
4903 unsigned char *fname
= 0; /* If non-0, original filename (must rename) */
4905 Lisp_Object handler
;
4906 Lisp_Object visit_file
;
4907 Lisp_Object annotations
;
4908 Lisp_Object encoded_filename
;
4909 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4910 int quietly
= !NILP (visit
);
4911 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4912 struct buffer
*given_buffer
;
4914 int buffer_file_type
= O_BINARY
;
4916 struct coding_system coding
;
4918 if (current_buffer
->base_buffer
&& visiting
)
4919 error ("Cannot do file visiting in an indirect buffer");
4921 if (!NILP (start
) && !STRINGP (start
))
4922 validate_region (&start
, &end
);
4924 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
4926 filename
= Fexpand_file_name (filename
, Qnil
);
4928 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4929 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4931 if (STRINGP (visit
))
4932 visit_file
= Fexpand_file_name (visit
, Qnil
);
4934 visit_file
= filename
;
4936 if (NILP (lockname
))
4937 lockname
= visit_file
;
4941 /* If the file name has special constructs in it,
4942 call the corresponding file handler. */
4943 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4944 /* If FILENAME has no handler, see if VISIT has one. */
4945 if (NILP (handler
) && STRINGP (visit
))
4946 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4948 if (!NILP (handler
))
4951 val
= call6 (handler
, Qwrite_region
, start
, end
,
4952 filename
, append
, visit
);
4956 SAVE_MODIFF
= MODIFF
;
4957 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4958 current_buffer
->filename
= visit_file
;
4964 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
4966 /* Special kludge to simplify auto-saving. */
4969 XSETFASTINT (start
, BEG
);
4970 XSETFASTINT (end
, Z
);
4974 record_unwind_protect (build_annotations_unwind
, Fcurrent_buffer ());
4975 count1
= SPECPDL_INDEX ();
4977 given_buffer
= current_buffer
;
4979 if (!STRINGP (start
))
4981 annotations
= build_annotations (start
, end
);
4983 if (current_buffer
!= given_buffer
)
4985 XSETFASTINT (start
, BEGV
);
4986 XSETFASTINT (end
, ZV
);
4992 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4994 /* Decide the coding-system to encode the data with.
4995 We used to make this choice before calling build_annotations, but that
4996 leads to problems when a write-annotate-function takes care of
4997 unsavable chars (as was the case with X-Symbol). */
4998 choose_write_coding_system (start
, end
, filename
,
4999 append
, visit
, lockname
, &coding
);
5000 Vlast_coding_system_used
= coding
.symbol
;
5002 given_buffer
= current_buffer
;
5003 if (! STRINGP (start
))
5005 annotations
= build_annotations_2 (start
, end
,
5006 coding
.pre_write_conversion
, annotations
);
5007 if (current_buffer
!= given_buffer
)
5009 XSETFASTINT (start
, BEGV
);
5010 XSETFASTINT (end
, ZV
);
5014 #ifdef CLASH_DETECTION
5017 #if 0 /* This causes trouble for GNUS. */
5018 /* If we've locked this file for some other buffer,
5019 query before proceeding. */
5020 if (!visiting
&& EQ (Ffile_locked_p (lockname
), Qt
))
5021 call2 (intern ("ask-user-about-lock"), filename
, Vuser_login_name
);
5024 lock_file (lockname
);
5026 #endif /* CLASH_DETECTION */
5028 encoded_filename
= ENCODE_FILE (filename
);
5030 fn
= SDATA (encoded_filename
);
5034 desc
= emacs_open (fn
, O_WRONLY
| buffer_file_type
, 0);
5035 #else /* not DOS_NT */
5036 desc
= emacs_open (fn
, O_WRONLY
, 0);
5037 #endif /* not DOS_NT */
5039 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
5041 if (auto_saving
) /* Overwrite any previous version of autosave file */
5043 vms_truncate (fn
); /* if fn exists, truncate to zero length */
5044 desc
= emacs_open (fn
, O_RDWR
, 0);
5046 desc
= creat_copy_attrs (STRINGP (current_buffer
->filename
)
5047 ? SDATA (current_buffer
->filename
) : 0,
5050 else /* Write to temporary name and rename if no errors */
5052 Lisp_Object temp_name
;
5053 temp_name
= Ffile_name_directory (filename
);
5055 if (!NILP (temp_name
))
5057 temp_name
= Fmake_temp_name (concat2 (temp_name
,
5058 build_string ("$$SAVE$$")));
5059 fname
= SDATA (filename
);
5060 fn
= SDATA (temp_name
);
5061 desc
= creat_copy_attrs (fname
, fn
);
5064 /* If we can't open the temporary file, try creating a new
5065 version of the original file. VMS "creat" creates a
5066 new version rather than truncating an existing file. */
5069 desc
= creat (fn
, 0666);
5070 #if 0 /* This can clobber an existing file and fail to replace it,
5071 if the user runs out of space. */
5074 /* We can't make a new version;
5075 try to truncate and rewrite existing version if any. */
5077 desc
= emacs_open (fn
, O_RDWR
, 0);
5083 desc
= creat (fn
, 0666);
5087 desc
= emacs_open (fn
,
5088 O_WRONLY
| O_CREAT
| buffer_file_type
5089 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
5090 S_IREAD
| S_IWRITE
);
5091 #else /* not DOS_NT */
5092 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
5093 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
5094 auto_saving
? auto_save_mode_bits
: 0666);
5095 #endif /* not DOS_NT */
5096 #endif /* not VMS */
5100 #ifdef CLASH_DETECTION
5102 if (!auto_saving
) unlock_file (lockname
);
5104 #endif /* CLASH_DETECTION */
5106 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
5109 record_unwind_protect (close_file_unwind
, make_number (desc
));
5111 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
5115 if (NUMBERP (append
))
5116 ret
= lseek (desc
, XINT (append
), 1);
5118 ret
= lseek (desc
, 0, 2);
5121 #ifdef CLASH_DETECTION
5122 if (!auto_saving
) unlock_file (lockname
);
5123 #endif /* CLASH_DETECTION */
5125 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
5133 * Kludge Warning: The VMS C RTL likes to insert carriage returns
5134 * if we do writes that don't end with a carriage return. Furthermore
5135 * it cannot handle writes of more then 16K. The modified
5136 * version of "sys_write" in SYSDEP.C (see comment there) copes with
5137 * this EXCEPT for the last record (iff it doesn't end with a carriage
5138 * return). This implies that if your buffer doesn't end with a carriage
5139 * return, you get one free... tough. However it also means that if
5140 * we make two calls to sys_write (a la the following code) you can
5141 * get one at the gap as well. The easiest way to fix this (honest)
5142 * is to move the gap to the next newline (or the end of the buffer).
5147 if (GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5148 move_gap (find_next_newline (GPT
, 1));
5150 /* Whether VMS or not, we must move the gap to the next of newline
5151 when we must put designation sequences at beginning of line. */
5152 if (INTEGERP (start
)
5153 && coding
.type
== coding_type_iso2022
5154 && coding
.flags
& CODING_FLAG_ISO_DESIGNATE_AT_BOL
5155 && GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5157 int opoint
= PT
, opoint_byte
= PT_BYTE
;
5158 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 0);
5159 move_gap_both (PT
, PT_BYTE
);
5160 SET_PT_BOTH (opoint
, opoint_byte
);
5167 if (STRINGP (start
))
5169 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
5170 &annotations
, &coding
);
5173 else if (XINT (start
) != XINT (end
))
5175 tem
= CHAR_TO_BYTE (XINT (start
));
5177 if (XINT (start
) < GPT
)
5179 failure
= 0 > a_write (desc
, Qnil
, XINT (start
),
5180 min (GPT
, XINT (end
)) - XINT (start
),
5181 &annotations
, &coding
);
5185 if (XINT (end
) > GPT
&& !failure
)
5187 tem
= max (XINT (start
), GPT
);
5188 failure
= 0 > a_write (desc
, Qnil
, tem
, XINT (end
) - tem
,
5189 &annotations
, &coding
);
5195 /* If file was empty, still need to write the annotations */
5196 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5197 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
5201 if (CODING_REQUIRE_FLUSHING (&coding
)
5202 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
5205 /* We have to flush out a data. */
5206 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5207 failure
= 0 > e_write (desc
, Qnil
, 0, 0, &coding
);
5214 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
5215 Disk full in NFS may be reported here. */
5216 /* mib says that closing the file will try to write as fast as NFS can do
5217 it, and that means the fsync here is not crucial for autosave files. */
5218 if (!auto_saving
&& fsync (desc
) < 0)
5220 /* If fsync fails with EINTR, don't treat that as serious. */
5222 failure
= 1, save_errno
= errno
;
5226 /* Spurious "file has changed on disk" warnings have been
5227 observed on Suns as well.
5228 It seems that `close' can change the modtime, under nfs.
5230 (This has supposedly been fixed in Sunos 4,
5231 but who knows about all the other machines with NFS?) */
5234 /* On VMS and APOLLO, must do the stat after the close
5235 since closing changes the modtime. */
5238 /* Recall that #if defined does not work on VMS. */
5245 /* NFS can report a write failure now. */
5246 if (emacs_close (desc
) < 0)
5247 failure
= 1, save_errno
= errno
;
5250 /* If we wrote to a temporary name and had no errors, rename to real name. */
5254 failure
= (rename (fn
, fname
) != 0), save_errno
= errno
;
5262 /* Discard the unwind protect for close_file_unwind. */
5263 specpdl_ptr
= specpdl
+ count1
;
5264 /* Restore the original current buffer. */
5265 visit_file
= unbind_to (count
, visit_file
);
5267 #ifdef CLASH_DETECTION
5269 unlock_file (lockname
);
5270 #endif /* CLASH_DETECTION */
5272 /* Do this before reporting IO error
5273 to avoid a "file has changed on disk" warning on
5274 next attempt to save. */
5276 current_buffer
->modtime
= st
.st_mtime
;
5279 error ("IO error writing %s: %s", SDATA (filename
),
5280 emacs_strerror (save_errno
));
5284 SAVE_MODIFF
= MODIFF
;
5285 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5286 current_buffer
->filename
= visit_file
;
5287 update_mode_lines
++;
5292 && ! NILP (Fstring_equal (current_buffer
->filename
,
5293 current_buffer
->auto_save_file_name
)))
5294 SAVE_MODIFF
= MODIFF
;
5300 message_with_string ((INTEGERP (append
)
5310 Lisp_Object
merge ();
5312 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
5313 doc
: /* Return t if (car A) is numerically less than (car B). */)
5317 return Flss (Fcar (a
), Fcar (b
));
5320 /* Build the complete list of annotations appropriate for writing out
5321 the text between START and END, by calling all the functions in
5322 write-region-annotate-functions and merging the lists they return.
5323 If one of these functions switches to a different buffer, we assume
5324 that buffer contains altered text. Therefore, the caller must
5325 make sure to restore the current buffer in all cases,
5326 as save-excursion would do. */
5329 build_annotations (start
, end
)
5330 Lisp_Object start
, end
;
5332 Lisp_Object annotations
;
5334 struct gcpro gcpro1
, gcpro2
;
5335 Lisp_Object original_buffer
;
5336 int i
, used_global
= 0;
5338 XSETBUFFER (original_buffer
, current_buffer
);
5341 p
= Vwrite_region_annotate_functions
;
5342 GCPRO2 (annotations
, p
);
5345 struct buffer
*given_buffer
= current_buffer
;
5346 if (EQ (Qt
, XCAR (p
)) && !used_global
)
5347 { /* Use the global value of the hook. */
5350 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
5352 p
= Fappend (2, arg
);
5355 Vwrite_region_annotations_so_far
= annotations
;
5356 res
= call2 (XCAR (p
), start
, end
);
5357 /* If the function makes a different buffer current,
5358 assume that means this buffer contains altered text to be output.
5359 Reset START and END from the buffer bounds
5360 and discard all previous annotations because they should have
5361 been dealt with by this function. */
5362 if (current_buffer
!= given_buffer
)
5364 XSETFASTINT (start
, BEGV
);
5365 XSETFASTINT (end
, ZV
);
5368 Flength (res
); /* Check basic validity of return value */
5369 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5373 /* Now do the same for annotation functions implied by the file-format */
5374 if (auto_saving
&& (!EQ (current_buffer
->auto_save_file_format
, Qt
)))
5375 p
= current_buffer
->auto_save_file_format
;
5377 p
= current_buffer
->file_format
;
5378 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
5380 struct buffer
*given_buffer
= current_buffer
;
5382 Vwrite_region_annotations_so_far
= annotations
;
5384 /* Value is either a list of annotations or nil if the function
5385 has written annotations to a temporary buffer, which is now
5387 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
5388 original_buffer
, make_number (i
));
5389 if (current_buffer
!= given_buffer
)
5391 XSETFASTINT (start
, BEGV
);
5392 XSETFASTINT (end
, ZV
);
5397 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5405 build_annotations_2 (start
, end
, pre_write_conversion
, annotations
)
5406 Lisp_Object start
, end
, pre_write_conversion
, annotations
;
5408 struct gcpro gcpro1
;
5411 GCPRO1 (annotations
);
5412 /* At last, do the same for the function PRE_WRITE_CONVERSION
5413 implied by the current coding-system. */
5414 if (!NILP (pre_write_conversion
))
5416 struct buffer
*given_buffer
= current_buffer
;
5417 Vwrite_region_annotations_so_far
= annotations
;
5418 res
= call2 (pre_write_conversion
, start
, end
);
5420 annotations
= (current_buffer
!= given_buffer
5422 : merge (annotations
, res
, Qcar_less_than_car
));
5429 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
5430 If STRING is nil, POS is the character position in the current buffer.
5431 Intersperse with them the annotations from *ANNOT
5432 which fall within the range of POS to POS + NCHARS,
5433 each at its appropriate position.
5435 We modify *ANNOT by discarding elements as we use them up.
5437 The return value is negative in case of system call failure. */
5440 a_write (desc
, string
, pos
, nchars
, annot
, coding
)
5443 register int nchars
;
5446 struct coding_system
*coding
;
5450 int lastpos
= pos
+ nchars
;
5452 while (NILP (*annot
) || CONSP (*annot
))
5454 tem
= Fcar_safe (Fcar (*annot
));
5457 nextpos
= XFASTINT (tem
);
5459 /* If there are no more annotations in this range,
5460 output the rest of the range all at once. */
5461 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
5462 return e_write (desc
, string
, pos
, lastpos
, coding
);
5464 /* Output buffer text up to the next annotation's position. */
5467 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
5471 /* Output the annotation. */
5472 tem
= Fcdr (Fcar (*annot
));
5475 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
5478 *annot
= Fcdr (*annot
);
5483 #ifndef WRITE_BUF_SIZE
5484 #define WRITE_BUF_SIZE (16 * 1024)
5487 /* Write text in the range START and END into descriptor DESC,
5488 encoding them with coding system CODING. If STRING is nil, START
5489 and END are character positions of the current buffer, else they
5490 are indexes to the string STRING. */
5493 e_write (desc
, string
, start
, end
, coding
)
5497 struct coding_system
*coding
;
5499 register char *addr
;
5500 register int nbytes
;
5501 char buf
[WRITE_BUF_SIZE
];
5505 coding
->composing
= COMPOSITION_DISABLED
;
5506 if (coding
->composing
!= COMPOSITION_DISABLED
)
5507 coding_save_composition (coding
, start
, end
, string
);
5509 if (STRINGP (string
))
5511 addr
= SDATA (string
);
5512 nbytes
= SBYTES (string
);
5513 coding
->src_multibyte
= STRING_MULTIBYTE (string
);
5515 else if (start
< end
)
5517 /* It is assured that the gap is not in the range START and END-1. */
5518 addr
= CHAR_POS_ADDR (start
);
5519 nbytes
= CHAR_TO_BYTE (end
) - CHAR_TO_BYTE (start
);
5520 coding
->src_multibyte
5521 = !NILP (current_buffer
->enable_multibyte_characters
);
5527 coding
->src_multibyte
= 1;
5530 /* We used to have a code for handling selective display here. But,
5531 now it is handled within encode_coding. */
5536 result
= encode_coding (coding
, addr
, buf
, nbytes
, WRITE_BUF_SIZE
);
5537 if (coding
->produced
> 0)
5539 coding
->produced
-= emacs_write (desc
, buf
, coding
->produced
);
5540 if (coding
->produced
)
5546 nbytes
-= coding
->consumed
;
5547 addr
+= coding
->consumed
;
5548 if (result
== CODING_FINISH_INSUFFICIENT_SRC
5551 /* The source text ends by an incomplete multibyte form.
5552 There's no way other than write it out as is. */
5553 nbytes
-= emacs_write (desc
, addr
, nbytes
);
5562 start
+= coding
->consumed_char
;
5563 if (coding
->cmp_data
)
5564 coding_adjust_composition_offset (coding
, start
);
5567 if (coding
->cmp_data
)
5568 coding_free_composition_data (coding
);
5573 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5574 Sverify_visited_file_modtime
, 1, 1, 0,
5575 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
5576 This means that the file has not been changed since it was visited or saved.
5577 See Info node `(elisp)Modification Time' for more details. */)
5583 Lisp_Object handler
;
5584 Lisp_Object filename
;
5589 if (!STRINGP (b
->filename
)) return Qt
;
5590 if (b
->modtime
== 0) return Qt
;
5592 /* If the file name has special constructs in it,
5593 call the corresponding file handler. */
5594 handler
= Ffind_file_name_handler (b
->filename
,
5595 Qverify_visited_file_modtime
);
5596 if (!NILP (handler
))
5597 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5599 filename
= ENCODE_FILE (b
->filename
);
5601 if (stat (SDATA (filename
), &st
) < 0)
5603 /* If the file doesn't exist now and didn't exist before,
5604 we say that it isn't modified, provided the error is a tame one. */
5605 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5610 if (st
.st_mtime
== b
->modtime
5611 /* If both are positive, accept them if they are off by one second. */
5612 || (st
.st_mtime
> 0 && b
->modtime
> 0
5613 && (st
.st_mtime
== b
->modtime
+ 1
5614 || st
.st_mtime
== b
->modtime
- 1)))
5619 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5620 Sclear_visited_file_modtime
, 0, 0, 0,
5621 doc
: /* Clear out records of last mod time of visited file.
5622 Next attempt to save will certainly not complain of a discrepancy. */)
5625 current_buffer
->modtime
= 0;
5629 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5630 Svisited_file_modtime
, 0, 0, 0,
5631 doc
: /* Return the current buffer's recorded visited file modification time.
5632 The value is a list of the form (HIGH LOW), like the time values
5633 that `file-attributes' returns. If the current buffer has no recorded
5634 file modification time, this function returns 0.
5635 See Info node `(elisp)Modification Time' for more details. */)
5639 tcons
= long_to_cons ((unsigned long) current_buffer
->modtime
);
5641 return list2 (XCAR (tcons
), XCDR (tcons
));
5645 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5646 Sset_visited_file_modtime
, 0, 1, 0,
5647 doc
: /* Update buffer's recorded modification time from the visited file's time.
5648 Useful if the buffer was not read from the file normally
5649 or if the file itself has been changed for some known benign reason.
5650 An argument specifies the modification time value to use
5651 \(instead of that of the visited file), in the form of a list
5652 \(HIGH . LOW) or (HIGH LOW). */)
5654 Lisp_Object time_list
;
5656 if (!NILP (time_list
))
5657 current_buffer
->modtime
= cons_to_long (time_list
);
5660 register Lisp_Object filename
;
5662 Lisp_Object handler
;
5664 filename
= Fexpand_file_name (current_buffer
->filename
, Qnil
);
5666 /* If the file name has special constructs in it,
5667 call the corresponding file handler. */
5668 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5669 if (!NILP (handler
))
5670 /* The handler can find the file name the same way we did. */
5671 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5673 filename
= ENCODE_FILE (filename
);
5675 if (stat (SDATA (filename
), &st
) >= 0)
5676 current_buffer
->modtime
= st
.st_mtime
;
5683 auto_save_error (error
)
5686 Lisp_Object args
[3], msg
;
5688 struct gcpro gcpro1
;
5692 args
[0] = build_string ("Auto-saving %s: %s");
5693 args
[1] = current_buffer
->name
;
5694 args
[2] = Ferror_message_string (error
);
5695 msg
= Fformat (3, args
);
5697 nbytes
= SBYTES (msg
);
5699 for (i
= 0; i
< 3; ++i
)
5702 message2 (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5704 message2_nolog (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5705 Fsleep_for (make_number (1), Qnil
);
5718 auto_save_mode_bits
= 0666;
5720 /* Get visited file's mode to become the auto save file's mode. */
5721 if (! NILP (current_buffer
->filename
))
5723 if (stat (SDATA (current_buffer
->filename
), &st
) >= 0)
5724 /* But make sure we can overwrite it later! */
5725 auto_save_mode_bits
= st
.st_mode
| 0600;
5726 else if ((modes
= Ffile_modes (current_buffer
->filename
),
5728 /* Remote files don't cooperate with stat. */
5729 auto_save_mode_bits
= XINT (modes
) | 0600;
5733 Fwrite_region (Qnil
, Qnil
,
5734 current_buffer
->auto_save_file_name
,
5735 Qnil
, Qlambda
, Qnil
, Qnil
);
5739 do_auto_save_unwind (stream
) /* used as unwind-protect function */
5744 fclose ((FILE *) (XFASTINT (XCAR (stream
)) << 16
5745 | XFASTINT (XCDR (stream
))));
5750 do_auto_save_unwind_1 (value
) /* used as unwind-protect function */
5753 minibuffer_auto_raise
= XINT (value
);
5758 do_auto_save_make_dir (dir
)
5761 return call2 (Qmake_directory
, dir
, Qt
);
5765 do_auto_save_eh (ignore
)
5771 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5772 doc
: /* Auto-save all buffers that need it.
5773 This is all buffers that have auto-saving enabled
5774 and are changed since last auto-saved.
5775 Auto-saving writes the buffer into a file
5776 so that your editing is not lost if the system crashes.
5777 This file is not the file you visited; that changes only when you save.
5778 Normally we run the normal hook `auto-save-hook' before saving.
5780 A non-nil NO-MESSAGE argument means do not print any message if successful.
5781 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5782 (no_message
, current_only
)
5783 Lisp_Object no_message
, current_only
;
5785 struct buffer
*old
= current_buffer
, *b
;
5786 Lisp_Object tail
, buf
;
5788 int do_handled_files
;
5791 Lisp_Object lispstream
;
5792 int count
= SPECPDL_INDEX ();
5793 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5794 int old_message_p
= 0;
5795 struct gcpro gcpro1
, gcpro2
;
5797 if (max_specpdl_size
< specpdl_size
+ 40)
5798 max_specpdl_size
= specpdl_size
+ 40;
5803 if (NILP (no_message
))
5805 old_message_p
= push_message ();
5806 record_unwind_protect (pop_message_unwind
, Qnil
);
5809 /* Ordinarily don't quit within this function,
5810 but don't make it impossible to quit (in case we get hung in I/O). */
5814 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5815 point to non-strings reached from Vbuffer_alist. */
5817 if (!NILP (Vrun_hooks
))
5818 call1 (Vrun_hooks
, intern ("auto-save-hook"));
5820 if (STRINGP (Vauto_save_list_file_name
))
5822 Lisp_Object listfile
;
5824 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5826 /* Don't try to create the directory when shutting down Emacs,
5827 because creating the directory might signal an error, and
5828 that would leave Emacs in a strange state. */
5829 if (!NILP (Vrun_hooks
))
5833 GCPRO2 (dir
, listfile
);
5834 dir
= Ffile_name_directory (listfile
);
5835 if (NILP (Ffile_directory_p (dir
)))
5836 internal_condition_case_1 (do_auto_save_make_dir
,
5837 dir
, Fcons (Fcons (Qfile_error
, Qnil
), Qnil
),
5842 stream
= fopen (SDATA (listfile
), "w");
5845 /* Arrange to close that file whether or not we get an error.
5846 Also reset auto_saving to 0. */
5847 lispstream
= Fcons (Qnil
, Qnil
);
5848 XSETCARFASTINT (lispstream
, (EMACS_UINT
)stream
>> 16);
5849 XSETCDRFASTINT (lispstream
, (EMACS_UINT
)stream
& 0xffff);
5860 record_unwind_protect (do_auto_save_unwind
, lispstream
);
5861 record_unwind_protect (do_auto_save_unwind_1
,
5862 make_number (minibuffer_auto_raise
));
5863 minibuffer_auto_raise
= 0;
5866 /* On first pass, save all files that don't have handlers.
5867 On second pass, save all files that do have handlers.
5869 If Emacs is crashing, the handlers may tweak what is causing
5870 Emacs to crash in the first place, and it would be a shame if
5871 Emacs failed to autosave perfectly ordinary files because it
5872 couldn't handle some ange-ftp'd file. */
5874 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5875 for (tail
= Vbuffer_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5877 buf
= XCDR (XCAR (tail
));
5880 /* Record all the buffers that have auto save mode
5881 in the special file that lists them. For each of these buffers,
5882 Record visited name (if any) and auto save name. */
5883 if (STRINGP (b
->auto_save_file_name
)
5884 && stream
!= NULL
&& do_handled_files
== 0)
5886 if (!NILP (b
->filename
))
5888 fwrite (SDATA (b
->filename
), 1,
5889 SBYTES (b
->filename
), stream
);
5891 putc ('\n', stream
);
5892 fwrite (SDATA (b
->auto_save_file_name
), 1,
5893 SBYTES (b
->auto_save_file_name
), stream
);
5894 putc ('\n', stream
);
5897 if (!NILP (current_only
)
5898 && b
!= current_buffer
)
5901 /* Don't auto-save indirect buffers.
5902 The base buffer takes care of it. */
5906 /* Check for auto save enabled
5907 and file changed since last auto save
5908 and file changed since last real save. */
5909 if (STRINGP (b
->auto_save_file_name
)
5910 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5911 && b
->auto_save_modified
< BUF_MODIFF (b
)
5912 /* -1 means we've turned off autosaving for a while--see below. */
5913 && XINT (b
->save_length
) >= 0
5914 && (do_handled_files
5915 || NILP (Ffind_file_name_handler (b
->auto_save_file_name
,
5918 EMACS_TIME before_time
, after_time
;
5920 EMACS_GET_TIME (before_time
);
5922 /* If we had a failure, don't try again for 20 minutes. */
5923 if (b
->auto_save_failure_time
>= 0
5924 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5927 if ((XFASTINT (b
->save_length
) * 10
5928 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5929 /* A short file is likely to change a large fraction;
5930 spare the user annoying messages. */
5931 && XFASTINT (b
->save_length
) > 5000
5932 /* These messages are frequent and annoying for `*mail*'. */
5933 && !EQ (b
->filename
, Qnil
)
5934 && NILP (no_message
))
5936 /* It has shrunk too much; turn off auto-saving here. */
5937 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5938 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
5940 minibuffer_auto_raise
= 0;
5941 /* Turn off auto-saving until there's a real save,
5942 and prevent any more warnings. */
5943 XSETINT (b
->save_length
, -1);
5944 Fsleep_for (make_number (1), Qnil
);
5947 set_buffer_internal (b
);
5948 if (!auto_saved
&& NILP (no_message
))
5949 message1 ("Auto-saving...");
5950 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5952 b
->auto_save_modified
= BUF_MODIFF (b
);
5953 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5954 set_buffer_internal (old
);
5956 EMACS_GET_TIME (after_time
);
5958 /* If auto-save took more than 60 seconds,
5959 assume it was an NFS failure that got a timeout. */
5960 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5961 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5965 /* Prevent another auto save till enough input events come in. */
5966 record_auto_save ();
5968 if (auto_saved
&& NILP (no_message
))
5972 /* If we are going to restore an old message,
5973 give time to read ours. */
5974 sit_for (1, 0, 0, 0, 0);
5978 /* If we displayed a message and then restored a state
5979 with no message, leave a "done" message on the screen. */
5980 message1 ("Auto-saving...done");
5985 /* This restores the message-stack status. */
5986 unbind_to (count
, Qnil
);
5990 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5991 Sset_buffer_auto_saved
, 0, 0, 0,
5992 doc
: /* Mark current buffer as auto-saved with its current text.
5993 No auto-save file will be written until the buffer changes again. */)
5996 current_buffer
->auto_save_modified
= MODIFF
;
5997 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5998 current_buffer
->auto_save_failure_time
= -1;
6002 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
6003 Sclear_buffer_auto_save_failure
, 0, 0, 0,
6004 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
6007 current_buffer
->auto_save_failure_time
= -1;
6011 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
6013 doc
: /* Return t if buffer has been auto-saved since last read in or saved. */)
6016 return (SAVE_MODIFF
< current_buffer
->auto_save_modified
) ? Qt
: Qnil
;
6019 /* Reading and completing file names */
6020 extern Lisp_Object
Ffile_name_completion (), Ffile_name_all_completions ();
6022 /* In the string VAL, change each $ to $$ and return the result. */
6025 double_dollars (val
)
6028 register const unsigned char *old
;
6029 register unsigned char *new;
6033 osize
= SBYTES (val
);
6035 /* Count the number of $ characters. */
6036 for (n
= osize
, count
= 0, old
= SDATA (val
); n
> 0; n
--)
6037 if (*old
++ == '$') count
++;
6041 val
= make_uninit_multibyte_string (SCHARS (val
) + count
,
6044 for (n
= osize
; n
> 0; n
--)
6058 read_file_name_cleanup (arg
)
6061 return (current_buffer
->directory
= arg
);
6064 DEFUN ("read-file-name-internal", Fread_file_name_internal
, Sread_file_name_internal
,
6066 doc
: /* Internal subroutine for read-file-name. Do not call this. */)
6067 (string
, dir
, action
)
6068 Lisp_Object string
, dir
, action
;
6069 /* action is nil for complete, t for return list of completions,
6070 lambda for verify final value */
6072 Lisp_Object name
, specdir
, realdir
, val
, orig_string
;
6074 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
6076 CHECK_STRING (string
);
6083 /* No need to protect ACTION--we only compare it with t and nil. */
6084 GCPRO5 (string
, realdir
, name
, specdir
, orig_string
);
6086 if (SCHARS (string
) == 0)
6088 if (EQ (action
, Qlambda
))
6096 orig_string
= string
;
6097 string
= Fsubstitute_in_file_name (string
);
6098 changed
= NILP (Fstring_equal (string
, orig_string
));
6099 name
= Ffile_name_nondirectory (string
);
6100 val
= Ffile_name_directory (string
);
6102 realdir
= Fexpand_file_name (val
, realdir
);
6107 specdir
= Ffile_name_directory (string
);
6108 val
= Ffile_name_completion (name
, realdir
);
6113 return double_dollars (string
);
6117 if (!NILP (specdir
))
6118 val
= concat2 (specdir
, val
);
6120 return double_dollars (val
);
6123 #endif /* not VMS */
6127 if (EQ (action
, Qt
))
6129 Lisp_Object all
= Ffile_name_all_completions (name
, realdir
);
6133 if (NILP (Vread_file_name_predicate
)
6134 || EQ (Vread_file_name_predicate
, Qfile_exists_p
))
6138 if (EQ (Vread_file_name_predicate
, Qfile_directory_p
))
6140 /* Brute-force speed up for directory checking:
6141 Discard strings which don't end in a slash. */
6142 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6144 Lisp_Object tem
= XCAR (all
);
6146 if (STRINGP (tem
) &&
6147 (len
= SCHARS (tem
), len
> 0) &&
6148 IS_DIRECTORY_SEP (SREF (tem
, len
-1)))
6149 comp
= Fcons (tem
, comp
);
6155 /* Must do it the hard (and slow) way. */
6156 GCPRO3 (all
, comp
, specdir
);
6157 count
= SPECPDL_INDEX ();
6158 record_unwind_protect (read_file_name_cleanup
, current_buffer
->directory
);
6159 current_buffer
->directory
= realdir
;
6160 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6161 if (!NILP (call1 (Vread_file_name_predicate
, XCAR (all
))))
6162 comp
= Fcons (XCAR (all
), comp
);
6163 unbind_to (count
, Qnil
);
6166 return Fnreverse (comp
);
6169 /* Only other case actually used is ACTION = lambda */
6171 /* Supposedly this helps commands such as `cd' that read directory names,
6172 but can someone explain how it helps them? -- RMS */
6173 if (SCHARS (name
) == 0)
6176 string
= Fexpand_file_name (string
, dir
);
6177 if (!NILP (Vread_file_name_predicate
))
6178 return call1 (Vread_file_name_predicate
, string
);
6179 return Ffile_exists_p (string
);
6182 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
6183 Snext_read_file_uses_dialog_p
, 0, 0, 0,
6184 doc
: /* Return t if a call to `read-file-name' will use a dialog.
6185 The return value is only relevant for a call to `read-file-name' that happens
6186 before any other event (mouse or keypress) is handeled. */)
6189 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6190 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
6199 DEFUN ("read-file-name", Fread_file_name
, Sread_file_name
, 1, 6, 0,
6200 doc
: /* Read file name, prompting with PROMPT and completing in directory DIR.
6201 Value is not expanded---you must call `expand-file-name' yourself.
6202 Default name to DEFAULT-FILENAME if user exits the minibuffer with
6203 the same non-empty string that was inserted by this function.
6204 (If DEFAULT-FILENAME is omitted, the visited file name is used,
6205 except that if INITIAL is specified, that combined with DIR is used.)
6206 If the user exits with an empty minibuffer, this function returns
6207 an empty string. (This can only happen if the user erased the
6208 pre-inserted contents or if `insert-default-directory' is nil.)
6209 Fourth arg MUSTMATCH non-nil means require existing file's name.
6210 Non-nil and non-t means also require confirmation after completion.
6211 Fifth arg INITIAL specifies text to start with.
6212 If optional sixth arg PREDICATE is non-nil, possible completions and
6213 the resulting file name must satisfy (funcall PREDICATE NAME).
6214 DIR should be an absolute directory name. It defaults to the value of
6215 `default-directory'.
6217 If this command was invoked with the mouse, use a file dialog box if
6218 `use-dialog-box' is non-nil, and the window system or X toolkit in use
6219 provides a file dialog box.
6221 See also `read-file-name-completion-ignore-case'
6222 and `read-file-name-function'. */)
6223 (prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
)
6224 Lisp_Object prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
;
6226 Lisp_Object val
, insdef
, tem
;
6227 struct gcpro gcpro1
, gcpro2
;
6228 register char *homedir
;
6229 Lisp_Object decoded_homedir
;
6230 int replace_in_history
= 0;
6231 int add_to_history
= 0;
6235 dir
= current_buffer
->directory
;
6236 if (NILP (Ffile_name_absolute_p (dir
)))
6237 dir
= Fexpand_file_name (dir
, Qnil
);
6238 if (NILP (default_filename
))
6241 ? Fexpand_file_name (initial
, dir
)
6242 : current_buffer
->filename
);
6244 /* If dir starts with user's homedir, change that to ~. */
6245 homedir
= (char *) egetenv ("HOME");
6247 /* homedir can be NULL in temacs, since Vprocess_environment is not
6248 yet set up. We shouldn't crash in that case. */
6251 homedir
= strcpy (alloca (strlen (homedir
) + 1), homedir
);
6252 CORRECT_DIR_SEPS (homedir
);
6257 = DECODE_FILE (make_unibyte_string (homedir
, strlen (homedir
)));
6260 && !strncmp (SDATA (decoded_homedir
), SDATA (dir
),
6261 SBYTES (decoded_homedir
))
6262 && IS_DIRECTORY_SEP (SREF (dir
, SBYTES (decoded_homedir
))))
6264 dir
= Fsubstring (dir
, make_number (SCHARS (decoded_homedir
)), Qnil
);
6265 dir
= concat2 (build_string ("~"), dir
);
6267 /* Likewise for default_filename. */
6269 && STRINGP (default_filename
)
6270 && !strncmp (SDATA (decoded_homedir
), SDATA (default_filename
),
6271 SBYTES (decoded_homedir
))
6272 && IS_DIRECTORY_SEP (SREF (default_filename
, SBYTES (decoded_homedir
))))
6275 = Fsubstring (default_filename
,
6276 make_number (SCHARS (decoded_homedir
)), Qnil
);
6277 default_filename
= concat2 (build_string ("~"), default_filename
);
6279 if (!NILP (default_filename
))
6281 CHECK_STRING (default_filename
);
6282 default_filename
= double_dollars (default_filename
);
6285 if (insert_default_directory
&& STRINGP (dir
))
6288 if (!NILP (initial
))
6290 Lisp_Object args
[2], pos
;
6294 insdef
= Fconcat (2, args
);
6295 pos
= make_number (SCHARS (double_dollars (dir
)));
6296 insdef
= Fcons (double_dollars (insdef
), pos
);
6299 insdef
= double_dollars (insdef
);
6301 else if (STRINGP (initial
))
6302 insdef
= Fcons (double_dollars (initial
), make_number (0));
6306 if (!NILP (Vread_file_name_function
))
6308 Lisp_Object args
[7];
6310 GCPRO2 (insdef
, default_filename
);
6311 args
[0] = Vread_file_name_function
;
6314 args
[3] = default_filename
;
6315 args
[4] = mustmatch
;
6317 args
[6] = predicate
;
6318 RETURN_UNGCPRO (Ffuncall (7, args
));
6321 count
= SPECPDL_INDEX ();
6322 specbind (intern ("completion-ignore-case"),
6323 read_file_name_completion_ignore_case
? Qt
: Qnil
);
6324 specbind (intern ("minibuffer-completing-file-name"), Qt
);
6325 specbind (intern ("read-file-name-predicate"),
6326 (NILP (predicate
) ? Qfile_exists_p
: predicate
));
6328 GCPRO2 (insdef
, default_filename
);
6330 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6331 if (! NILP (Fnext_read_file_uses_dialog_p ()))
6333 /* If DIR contains a file name, split it. */
6335 file
= Ffile_name_nondirectory (dir
);
6336 if (SCHARS (file
) && NILP (default_filename
))
6338 default_filename
= file
;
6339 dir
= Ffile_name_directory (dir
);
6341 if (!NILP(default_filename
))
6342 default_filename
= Fexpand_file_name (default_filename
, dir
);
6343 val
= Fx_file_dialog (prompt
, dir
, default_filename
, mustmatch
,
6344 EQ (predicate
, Qfile_directory_p
) ? Qt
: Qnil
);
6349 val
= Fcompleting_read (prompt
, intern ("read-file-name-internal"),
6350 dir
, mustmatch
, insdef
,
6351 Qfile_name_history
, default_filename
, Qnil
);
6353 tem
= Fsymbol_value (Qfile_name_history
);
6354 if (CONSP (tem
) && EQ (XCAR (tem
), val
))
6355 replace_in_history
= 1;
6357 /* If Fcompleting_read returned the inserted default string itself
6358 (rather than a new string with the same contents),
6359 it has to mean that the user typed RET with the minibuffer empty.
6360 In that case, we really want to return ""
6361 so that commands such as set-visited-file-name can distinguish. */
6362 if (EQ (val
, default_filename
))
6364 /* In this case, Fcompleting_read has not added an element
6365 to the history. Maybe we should. */
6366 if (! replace_in_history
)
6372 unbind_to (count
, Qnil
);
6375 error ("No file name specified");
6377 tem
= Fstring_equal (val
, CONSP (insdef
) ? XCAR (insdef
) : insdef
);
6379 if (!NILP (tem
) && !NILP (default_filename
))
6380 val
= default_filename
;
6381 val
= Fsubstitute_in_file_name (val
);
6383 if (replace_in_history
)
6384 /* Replace what Fcompleting_read added to the history
6385 with what we will actually return. */
6387 Lisp_Object val1
= double_dollars (val
);
6388 tem
= Fsymbol_value (Qfile_name_history
);
6389 if (history_delete_duplicates
)
6390 XSETCDR (tem
, Fdelete (val1
, XCDR(tem
)));
6391 XSETCAR (tem
, val1
);
6393 else if (add_to_history
)
6395 /* Add the value to the history--but not if it matches
6396 the last value already there. */
6397 Lisp_Object val1
= double_dollars (val
);
6398 tem
= Fsymbol_value (Qfile_name_history
);
6399 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
6401 if (history_delete_duplicates
) tem
= Fdelete (val1
, tem
);
6402 Fset (Qfile_name_history
, Fcons (val1
, tem
));
6413 /* Must be set before any path manipulation is performed. */
6414 XSETFASTINT (Vdirectory_sep_char
, '/');
6421 Qexpand_file_name
= intern ("expand-file-name");
6422 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
6423 Qdirectory_file_name
= intern ("directory-file-name");
6424 Qfile_name_directory
= intern ("file-name-directory");
6425 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
6426 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
6427 Qfile_name_as_directory
= intern ("file-name-as-directory");
6428 Qcopy_file
= intern ("copy-file");
6429 Qmake_directory_internal
= intern ("make-directory-internal");
6430 Qmake_directory
= intern ("make-directory");
6431 Qdelete_directory
= intern ("delete-directory");
6432 Qdelete_file
= intern ("delete-file");
6433 Qrename_file
= intern ("rename-file");
6434 Qadd_name_to_file
= intern ("add-name-to-file");
6435 Qmake_symbolic_link
= intern ("make-symbolic-link");
6436 Qfile_exists_p
= intern ("file-exists-p");
6437 Qfile_executable_p
= intern ("file-executable-p");
6438 Qfile_readable_p
= intern ("file-readable-p");
6439 Qfile_writable_p
= intern ("file-writable-p");
6440 Qfile_symlink_p
= intern ("file-symlink-p");
6441 Qaccess_file
= intern ("access-file");
6442 Qfile_directory_p
= intern ("file-directory-p");
6443 Qfile_regular_p
= intern ("file-regular-p");
6444 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
6445 Qfile_modes
= intern ("file-modes");
6446 Qset_file_modes
= intern ("set-file-modes");
6447 Qset_file_times
= intern ("set-file-times");
6448 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
6449 Qinsert_file_contents
= intern ("insert-file-contents");
6450 Qwrite_region
= intern ("write-region");
6451 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
6452 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
6453 Qauto_save_coding
= intern ("auto-save-coding");
6455 staticpro (&Qexpand_file_name
);
6456 staticpro (&Qsubstitute_in_file_name
);
6457 staticpro (&Qdirectory_file_name
);
6458 staticpro (&Qfile_name_directory
);
6459 staticpro (&Qfile_name_nondirectory
);
6460 staticpro (&Qunhandled_file_name_directory
);
6461 staticpro (&Qfile_name_as_directory
);
6462 staticpro (&Qcopy_file
);
6463 staticpro (&Qmake_directory_internal
);
6464 staticpro (&Qmake_directory
);
6465 staticpro (&Qdelete_directory
);
6466 staticpro (&Qdelete_file
);
6467 staticpro (&Qrename_file
);
6468 staticpro (&Qadd_name_to_file
);
6469 staticpro (&Qmake_symbolic_link
);
6470 staticpro (&Qfile_exists_p
);
6471 staticpro (&Qfile_executable_p
);
6472 staticpro (&Qfile_readable_p
);
6473 staticpro (&Qfile_writable_p
);
6474 staticpro (&Qaccess_file
);
6475 staticpro (&Qfile_symlink_p
);
6476 staticpro (&Qfile_directory_p
);
6477 staticpro (&Qfile_regular_p
);
6478 staticpro (&Qfile_accessible_directory_p
);
6479 staticpro (&Qfile_modes
);
6480 staticpro (&Qset_file_modes
);
6481 staticpro (&Qset_file_times
);
6482 staticpro (&Qfile_newer_than_file_p
);
6483 staticpro (&Qinsert_file_contents
);
6484 staticpro (&Qwrite_region
);
6485 staticpro (&Qverify_visited_file_modtime
);
6486 staticpro (&Qset_visited_file_modtime
);
6487 staticpro (&Qauto_save_coding
);
6489 Qfile_name_history
= intern ("file-name-history");
6490 Fset (Qfile_name_history
, Qnil
);
6491 staticpro (&Qfile_name_history
);
6493 Qfile_error
= intern ("file-error");
6494 staticpro (&Qfile_error
);
6495 Qfile_already_exists
= intern ("file-already-exists");
6496 staticpro (&Qfile_already_exists
);
6497 Qfile_date_error
= intern ("file-date-error");
6498 staticpro (&Qfile_date_error
);
6499 Qexcl
= intern ("excl");
6503 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
6504 staticpro (&Qfind_buffer_file_type
);
6507 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
6508 doc
: /* *Coding system for encoding file names.
6509 If it is nil, `default-file-name-coding-system' (which see) is used. */);
6510 Vfile_name_coding_system
= Qnil
;
6512 DEFVAR_LISP ("default-file-name-coding-system",
6513 &Vdefault_file_name_coding_system
,
6514 doc
: /* Default coding system for encoding file names.
6515 This variable is used only when `file-name-coding-system' is nil.
6517 This variable is set/changed by the command `set-language-environment'.
6518 User should not set this variable manually,
6519 instead use `file-name-coding-system' to get a constant encoding
6520 of file names regardless of the current language environment. */);
6521 Vdefault_file_name_coding_system
= Qnil
;
6523 Qformat_decode
= intern ("format-decode");
6524 staticpro (&Qformat_decode
);
6525 Qformat_annotate_function
= intern ("format-annotate-function");
6526 staticpro (&Qformat_annotate_function
);
6527 Qafter_insert_file_set_coding
= intern ("after-insert-file-set-coding");
6528 staticpro (&Qafter_insert_file_set_coding
);
6530 Qcar_less_than_car
= intern ("car-less-than-car");
6531 staticpro (&Qcar_less_than_car
);
6533 Fput (Qfile_error
, Qerror_conditions
,
6534 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
6535 Fput (Qfile_error
, Qerror_message
,
6536 build_string ("File error"));
6538 Fput (Qfile_already_exists
, Qerror_conditions
,
6539 Fcons (Qfile_already_exists
,
6540 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6541 Fput (Qfile_already_exists
, Qerror_message
,
6542 build_string ("File already exists"));
6544 Fput (Qfile_date_error
, Qerror_conditions
,
6545 Fcons (Qfile_date_error
,
6546 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6547 Fput (Qfile_date_error
, Qerror_message
,
6548 build_string ("Cannot set file date"));
6550 DEFVAR_LISP ("read-file-name-function", &Vread_file_name_function
,
6551 doc
: /* If this is non-nil, `read-file-name' does its work by calling this function. */);
6552 Vread_file_name_function
= Qnil
;
6554 DEFVAR_LISP ("read-file-name-predicate", &Vread_file_name_predicate
,
6555 doc
: /* Current predicate used by `read-file-name-internal'. */);
6556 Vread_file_name_predicate
= Qnil
;
6558 DEFVAR_BOOL ("read-file-name-completion-ignore-case", &read_file_name_completion_ignore_case
,
6559 doc
: /* *Non-nil means when reading a file name completion ignores case. */);
6560 #if defined VMS || defined DOS_NT || defined MAC_OS
6561 read_file_name_completion_ignore_case
= 1;
6563 read_file_name_completion_ignore_case
= 0;
6566 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
6567 doc
: /* *Non-nil means when reading a filename start with default dir in minibuffer.
6568 If the initial minibuffer contents are non-empty, you can usually
6569 request a default filename by typing RETURN without editing. For some
6570 commands, exiting with an empty minibuffer has a special meaning,
6571 such as making the current buffer visit no file in the case of
6572 `set-visited-file-name'.
6573 If this variable is non-nil, the minibuffer contents are always
6574 initially non-empty and typing RETURN without editing will fetch the
6575 default name, if one is provided. Note however that this default name
6576 is not necessarily the name originally inserted in the minibuffer, if
6577 that is just the default directory.
6578 If this variable is nil, the minibuffer often starts out empty. In
6579 that case you may have to explicitly fetch the next history element to
6580 request the default name. */);
6581 insert_default_directory
= 1;
6583 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
6584 doc
: /* *Non-nil means write new files with record format `stmlf'.
6585 nil means use format `var'. This variable is meaningful only on VMS. */);
6586 vms_stmlf_recfm
= 0;
6588 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
6589 doc
: /* Directory separator character for built-in functions that return file names.
6590 The value is always ?/. Don't use this variable, just use `/'. */);
6592 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
6593 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
6594 If a file name matches REGEXP, then all I/O on that file is done by calling
6597 The first argument given to HANDLER is the name of the I/O primitive
6598 to be handled; the remaining arguments are the arguments that were
6599 passed to that primitive. For example, if you do
6600 (file-exists-p FILENAME)
6601 and FILENAME is handled by HANDLER, then HANDLER is called like this:
6602 (funcall HANDLER 'file-exists-p FILENAME)
6603 The function `find-file-name-handler' checks this list for a handler
6604 for its argument. */);
6605 Vfile_name_handler_alist
= Qnil
;
6607 DEFVAR_LISP ("set-auto-coding-function",
6608 &Vset_auto_coding_function
,
6609 doc
: /* If non-nil, a function to call to decide a coding system of file.
6610 Two arguments are passed to this function: the file name
6611 and the length of a file contents following the point.
6612 This function should return a coding system to decode the file contents.
6613 It should check the file name against `auto-coding-alist'.
6614 If no coding system is decided, it should check a coding system
6615 specified in the heading lines with the format:
6616 -*- ... coding: CODING-SYSTEM; ... -*-
6617 or local variable spec of the tailing lines with `coding:' tag. */);
6618 Vset_auto_coding_function
= Qnil
;
6620 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
6621 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
6622 Each is passed one argument, the number of characters inserted.
6623 It should return the new character count, and leave point the same.
6624 If `insert-file-contents' is intercepted by a handler from
6625 `file-name-handler-alist', that handler is responsible for calling the
6626 functions in `after-insert-file-functions' if appropriate. */);
6627 Vafter_insert_file_functions
= Qnil
;
6629 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
6630 doc
: /* A list of functions to be called at the start of `write-region'.
6631 Each is passed two arguments, START and END as for `write-region'.
6632 These are usually two numbers but not always; see the documentation
6633 for `write-region'. The function should return a list of pairs
6634 of the form (POSITION . STRING), consisting of strings to be effectively
6635 inserted at the specified positions of the file being written (1 means to
6636 insert before the first byte written). The POSITIONs must be sorted into
6637 increasing order. If there are several functions in the list, the several
6638 lists are merged destructively. Alternatively, the function can return
6639 with a different buffer current; in that case it should pay attention
6640 to the annotations returned by previous functions and listed in
6641 `write-region-annotations-so-far'.*/);
6642 Vwrite_region_annotate_functions
= Qnil
;
6643 staticpro (&Qwrite_region_annotate_functions
);
6644 Qwrite_region_annotate_functions
6645 = intern ("write-region-annotate-functions");
6647 DEFVAR_LISP ("write-region-annotations-so-far",
6648 &Vwrite_region_annotations_so_far
,
6649 doc
: /* When an annotation function is called, this holds the previous annotations.
6650 These are the annotations made by other annotation functions
6651 that were already called. See also `write-region-annotate-functions'. */);
6652 Vwrite_region_annotations_so_far
= Qnil
;
6654 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
6655 doc
: /* A list of file name handlers that temporarily should not be used.
6656 This applies only to the operation `inhibit-file-name-operation'. */);
6657 Vinhibit_file_name_handlers
= Qnil
;
6659 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
6660 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
6661 Vinhibit_file_name_operation
= Qnil
;
6663 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
6664 doc
: /* File name in which we write a list of all auto save file names.
6665 This variable is initialized automatically from `auto-save-list-file-prefix'
6666 shortly after Emacs reads your `.emacs' file, if you have not yet given it
6667 a non-nil value. */);
6668 Vauto_save_list_file_name
= Qnil
;
6670 defsubr (&Sfind_file_name_handler
);
6671 defsubr (&Sfile_name_directory
);
6672 defsubr (&Sfile_name_nondirectory
);
6673 defsubr (&Sunhandled_file_name_directory
);
6674 defsubr (&Sfile_name_as_directory
);
6675 defsubr (&Sdirectory_file_name
);
6676 defsubr (&Smake_temp_name
);
6677 defsubr (&Sexpand_file_name
);
6678 defsubr (&Ssubstitute_in_file_name
);
6679 defsubr (&Scopy_file
);
6680 defsubr (&Smake_directory_internal
);
6681 defsubr (&Sdelete_directory
);
6682 defsubr (&Sdelete_file
);
6683 defsubr (&Srename_file
);
6684 defsubr (&Sadd_name_to_file
);
6686 defsubr (&Smake_symbolic_link
);
6687 #endif /* S_IFLNK */
6689 defsubr (&Sdefine_logical_name
);
6692 defsubr (&Ssysnetunam
);
6693 #endif /* HPUX_NET */
6694 defsubr (&Sfile_name_absolute_p
);
6695 defsubr (&Sfile_exists_p
);
6696 defsubr (&Sfile_executable_p
);
6697 defsubr (&Sfile_readable_p
);
6698 defsubr (&Sfile_writable_p
);
6699 defsubr (&Saccess_file
);
6700 defsubr (&Sfile_symlink_p
);
6701 defsubr (&Sfile_directory_p
);
6702 defsubr (&Sfile_accessible_directory_p
);
6703 defsubr (&Sfile_regular_p
);
6704 defsubr (&Sfile_modes
);
6705 defsubr (&Sset_file_modes
);
6706 defsubr (&Sset_file_times
);
6707 defsubr (&Sset_default_file_modes
);
6708 defsubr (&Sdefault_file_modes
);
6709 defsubr (&Sfile_newer_than_file_p
);
6710 defsubr (&Sinsert_file_contents
);
6711 defsubr (&Swrite_region
);
6712 defsubr (&Scar_less_than_car
);
6713 defsubr (&Sverify_visited_file_modtime
);
6714 defsubr (&Sclear_visited_file_modtime
);
6715 defsubr (&Svisited_file_modtime
);
6716 defsubr (&Sset_visited_file_modtime
);
6717 defsubr (&Sdo_auto_save
);
6718 defsubr (&Sset_buffer_auto_saved
);
6719 defsubr (&Sclear_buffer_auto_save_failure
);
6720 defsubr (&Srecent_auto_save_p
);
6722 defsubr (&Sread_file_name_internal
);
6723 defsubr (&Sread_file_name
);
6724 defsubr (&Snext_read_file_uses_dialog_p
);
6727 defsubr (&Sunix_sync
);
6731 /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c
6732 (do not change this comment) */