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 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)
76 #include "intervals.h"
78 #include "character.h"
87 #endif /* not WINDOWSNT */
91 #include <sys/param.h>
99 #define CORRECT_DIR_SEPS(s) \
100 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
101 else unixtodos_filename (s); \
103 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
104 redirector allows the six letters between 'Z' and 'a' as well. */
106 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
109 #define IS_DRIVE(x) isalpha (x)
111 /* Need to lower-case the drive letter, or else expanded
112 filenames will sometimes compare inequal, because
113 `expand-file-name' doesn't always down-case the drive letter. */
114 #define DRIVE_LETTER(x) (tolower (x))
135 #include "commands.h"
136 extern int use_dialog_box
;
137 extern int use_file_dialog
;
151 #ifndef FILE_SYSTEM_CASE
152 #define FILE_SYSTEM_CASE(filename) (filename)
155 /* Nonzero during writing of auto-save files */
158 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
159 a new file with the same mode as the original */
160 int auto_save_mode_bits
;
162 /* The symbol bound to coding-system-for-read when
163 insert-file-contents is called for recovering a file. This is not
164 an actual coding system name, but just an indicator to tell
165 insert-file-contents to use `emacs-mule' with a special flag for
166 auto saving and recovering a file. */
167 Lisp_Object Qauto_save_coding
;
169 /* Coding system for file names, or nil if none. */
170 Lisp_Object Vfile_name_coding_system
;
172 /* Coding system for file names used only when
173 Vfile_name_coding_system is nil. */
174 Lisp_Object Vdefault_file_name_coding_system
;
176 /* Alist of elements (REGEXP . HANDLER) for file names
177 whose I/O is done with a special handler. */
178 Lisp_Object Vfile_name_handler_alist
;
180 /* Lisp functions for translating file formats */
181 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
183 /* Function to be called to decide a coding system of a reading file. */
184 Lisp_Object Vset_auto_coding_function
;
186 /* Functions to be called to process text properties in inserted file. */
187 Lisp_Object Vafter_insert_file_functions
;
189 /* Lisp function for setting buffer-file-coding-system and the
190 multibyteness of the current buffer after inserting a file. */
191 Lisp_Object Qafter_insert_file_set_coding
;
193 /* Functions to be called to create text property annotations for file. */
194 Lisp_Object Vwrite_region_annotate_functions
;
195 Lisp_Object Qwrite_region_annotate_functions
;
197 /* During build_annotations, each time an annotation function is called,
198 this holds the annotations made by the previous functions. */
199 Lisp_Object Vwrite_region_annotations_so_far
;
201 /* File name in which we write a list of all our auto save files. */
202 Lisp_Object Vauto_save_list_file_name
;
204 /* Function to call to read a file name. */
205 Lisp_Object Vread_file_name_function
;
207 /* Current predicate used by read_file_name_internal. */
208 Lisp_Object Vread_file_name_predicate
;
210 /* Nonzero means completion ignores case when reading file name. */
211 int read_file_name_completion_ignore_case
;
213 /* Nonzero means, when reading a filename in the minibuffer,
214 start out by inserting the default directory into the minibuffer. */
215 int insert_default_directory
;
217 /* On VMS, nonzero means write new files with record format stmlf.
218 Zero means use var format. */
221 /* On NT, specifies the directory separator character, used (eg.) when
222 expanding file names. This can be bound to / or \. */
223 Lisp_Object Vdirectory_sep_char
;
225 extern Lisp_Object Vuser_login_name
;
228 extern Lisp_Object Vw32_get_true_file_attributes
;
231 extern int minibuf_level
;
233 extern int minibuffer_auto_raise
;
235 extern int history_delete_duplicates
;
237 /* These variables describe handlers that have "already" had a chance
238 to handle the current operation.
240 Vinhibit_file_name_handlers is a list of file name handlers.
241 Vinhibit_file_name_operation is the operation being handled.
242 If we try to handle that operation, we ignore those handlers. */
244 static Lisp_Object Vinhibit_file_name_handlers
;
245 static Lisp_Object Vinhibit_file_name_operation
;
247 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
249 Lisp_Object Qfile_name_history
;
251 Lisp_Object Qcar_less_than_car
;
253 static int a_write
P_ ((int, Lisp_Object
, int, int,
254 Lisp_Object
*, struct coding_system
*));
255 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
259 report_file_error (string
, data
)
263 Lisp_Object errstring
;
267 synchronize_system_messages_locale ();
268 str
= strerror (errorno
);
269 errstring
= code_convert_string_norecord (make_unibyte_string (str
,
271 Vlocale_coding_system
, 0);
277 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
280 /* System error messages are capitalized. Downcase the initial
281 unless it is followed by a slash. */
282 if (SREF (errstring
, 1) != '/')
283 SSET (errstring
, 0, DOWNCASE (SREF (errstring
, 0)));
285 Fsignal (Qfile_error
,
286 Fcons (build_string (string
), Fcons (errstring
, data
)));
291 close_file_unwind (fd
)
294 emacs_close (XFASTINT (fd
));
298 /* Restore point, having saved it as a marker. */
301 restore_point_unwind (location
)
302 Lisp_Object location
;
304 Fgoto_char (location
);
305 Fset_marker (location
, Qnil
, Qnil
);
310 Lisp_Object Qexpand_file_name
;
311 Lisp_Object Qsubstitute_in_file_name
;
312 Lisp_Object Qdirectory_file_name
;
313 Lisp_Object Qfile_name_directory
;
314 Lisp_Object Qfile_name_nondirectory
;
315 Lisp_Object Qunhandled_file_name_directory
;
316 Lisp_Object Qfile_name_as_directory
;
317 Lisp_Object Qcopy_file
;
318 Lisp_Object Qmake_directory_internal
;
319 Lisp_Object Qmake_directory
;
320 Lisp_Object Qdelete_directory
;
321 Lisp_Object Qdelete_file
;
322 Lisp_Object Qrename_file
;
323 Lisp_Object Qadd_name_to_file
;
324 Lisp_Object Qmake_symbolic_link
;
325 Lisp_Object Qfile_exists_p
;
326 Lisp_Object Qfile_executable_p
;
327 Lisp_Object Qfile_readable_p
;
328 Lisp_Object Qfile_writable_p
;
329 Lisp_Object Qfile_symlink_p
;
330 Lisp_Object Qaccess_file
;
331 Lisp_Object Qfile_directory_p
;
332 Lisp_Object Qfile_regular_p
;
333 Lisp_Object Qfile_accessible_directory_p
;
334 Lisp_Object Qfile_modes
;
335 Lisp_Object Qset_file_modes
;
336 Lisp_Object Qset_file_times
;
337 Lisp_Object Qfile_newer_than_file_p
;
338 Lisp_Object Qinsert_file_contents
;
339 Lisp_Object Qwrite_region
;
340 Lisp_Object Qverify_visited_file_modtime
;
341 Lisp_Object Qset_visited_file_modtime
;
343 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
344 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
345 Otherwise, return nil.
346 A file name is handled if one of the regular expressions in
347 `file-name-handler-alist' matches it.
349 If OPERATION equals `inhibit-file-name-operation', then we ignore
350 any handlers that are members of `inhibit-file-name-handlers',
351 but we still do run any other handlers. This lets handlers
352 use the standard functions without calling themselves recursively. */)
353 (filename
, operation
)
354 Lisp_Object filename
, operation
;
356 /* This function must not munge the match data. */
357 Lisp_Object chain
, inhibited_handlers
, result
;
361 CHECK_STRING (filename
);
363 if (EQ (operation
, Vinhibit_file_name_operation
))
364 inhibited_handlers
= Vinhibit_file_name_handlers
;
366 inhibited_handlers
= Qnil
;
368 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
369 chain
= XCDR (chain
))
379 && (match_pos
= fast_string_match (string
, filename
)) > pos
)
381 Lisp_Object handler
, tem
;
383 handler
= XCDR (elt
);
384 tem
= Fmemq (handler
, inhibited_handlers
);
398 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
400 doc
: /* Return the directory component in file name FILENAME.
401 Return nil if FILENAME does not include a directory.
402 Otherwise return a directory spec.
403 Given a Unix syntax file name, returns a string ending in slash;
404 on VMS, perhaps instead a string ending in `:', `]' or `>'. */)
406 Lisp_Object filename
;
409 register const unsigned char *beg
;
411 register unsigned char *beg
;
413 register const unsigned char *p
;
416 CHECK_STRING (filename
);
418 /* If the file name has special constructs in it,
419 call the corresponding file handler. */
420 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
422 return call2 (handler
, Qfile_name_directory
, filename
);
424 filename
= FILE_SYSTEM_CASE (filename
);
425 beg
= SDATA (filename
);
427 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
429 p
= beg
+ SBYTES (filename
);
431 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
433 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
436 /* only recognise drive specifier at the beginning */
438 /* handle the "/:d:foo" and "/:foo" cases correctly */
439 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
440 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
447 /* Expansion of "c:" to drive and default directory. */
450 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
451 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
452 unsigned char *r
= res
;
454 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
456 strncpy (res
, beg
, 2);
461 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
463 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
466 p
= beg
+ strlen (beg
);
469 CORRECT_DIR_SEPS (beg
);
472 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
475 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
476 Sfile_name_nondirectory
, 1, 1, 0,
477 doc
: /* Return file name FILENAME sans its directory.
478 For example, in a Unix-syntax file name,
479 this is everything after the last slash,
480 or the entire name if it contains no slash. */)
482 Lisp_Object filename
;
484 register const unsigned char *beg
, *p
, *end
;
487 CHECK_STRING (filename
);
489 /* If the file name has special constructs in it,
490 call the corresponding file handler. */
491 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
493 return call2 (handler
, Qfile_name_nondirectory
, filename
);
495 beg
= SDATA (filename
);
496 end
= p
= beg
+ SBYTES (filename
);
498 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
500 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
503 /* only recognise drive specifier at beginning */
505 /* handle the "/:d:foo" case correctly */
506 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
511 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
514 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
515 Sunhandled_file_name_directory
, 1, 1, 0,
516 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
517 A `directly usable' directory name is one that may be used without the
518 intervention of any file handler.
519 If FILENAME is a directly usable file itself, return
520 \(file-name-directory FILENAME).
521 The `call-process' and `start-process' functions use this function to
522 get a current directory to run processes in. */)
524 Lisp_Object filename
;
528 /* If the file name has special constructs in it,
529 call the corresponding file handler. */
530 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
532 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
534 return Ffile_name_directory (filename
);
539 file_name_as_directory (out
, in
)
542 int size
= strlen (in
) - 1;
555 /* Is it already a directory string? */
556 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
558 /* Is it a VMS directory file name? If so, hack VMS syntax. */
559 else if (! index (in
, '/')
560 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
561 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
562 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
563 || ! strncmp (&in
[size
- 5], ".dir", 4))
564 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
565 && in
[size
] == '1')))
567 register char *p
, *dot
;
571 dir:x.dir --> dir:[x]
572 dir:[x]y.dir --> dir:[x.y] */
574 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
577 strncpy (out
, in
, p
- in
);
596 dot
= index (p
, '.');
599 /* blindly remove any extension */
600 size
= strlen (out
) + (dot
- p
);
601 strncat (out
, p
, dot
- p
);
612 /* For Unix syntax, Append a slash if necessary */
613 if (!IS_DIRECTORY_SEP (out
[size
]))
615 /* Cannot use DIRECTORY_SEP, which could have any value */
617 out
[size
+ 2] = '\0';
620 CORRECT_DIR_SEPS (out
);
626 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
627 Sfile_name_as_directory
, 1, 1, 0,
628 doc
: /* Return a string representing the file name FILE interpreted as a directory.
629 This operation exists because a directory is also a file, but its name as
630 a directory is different from its name as a file.
631 The result can be used as the value of `default-directory'
632 or passed as second argument to `expand-file-name'.
633 For a Unix-syntax file name, just appends a slash.
634 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */)
645 /* If the file name has special constructs in it,
646 call the corresponding file handler. */
647 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
649 return call2 (handler
, Qfile_name_as_directory
, file
);
651 buf
= (char *) alloca (SBYTES (file
) + 10);
652 file_name_as_directory (buf
, SDATA (file
));
653 return make_specified_string (buf
, -1, strlen (buf
),
654 STRING_MULTIBYTE (file
));
658 * Convert from directory name to filename.
660 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
661 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
662 * On UNIX, it's simple: just make sure there isn't a terminating /
664 * Value is nonzero if the string output is different from the input.
668 directory_file_name (src
, dst
)
676 struct FAB fab
= cc$rms_fab
;
677 struct NAM nam
= cc$rms_nam
;
678 char esa
[NAM$C_MAXRSS
];
683 if (! index (src
, '/')
684 && (src
[slen
- 1] == ']'
685 || src
[slen
- 1] == ':'
686 || src
[slen
- 1] == '>'))
688 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
690 fab
.fab$b_fns
= slen
;
691 fab
.fab$l_nam
= &nam
;
692 fab
.fab$l_fop
= FAB$M_NAM
;
695 nam
.nam$b_ess
= sizeof esa
;
696 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
698 /* We call SYS$PARSE to handle such things as [--] for us. */
699 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
701 slen
= nam
.nam$b_esl
;
702 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
707 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
709 /* what about when we have logical_name:???? */
710 if (src
[slen
- 1] == ':')
711 { /* Xlate logical name and see what we get */
712 ptr
= strcpy (dst
, src
); /* upper case for getenv */
715 if ('a' <= *ptr
&& *ptr
<= 'z')
719 dst
[slen
- 1] = 0; /* remove colon */
720 if (!(src
= egetenv (dst
)))
722 /* should we jump to the beginning of this procedure?
723 Good points: allows us to use logical names that xlate
725 Bad points: can be a problem if we just translated to a device
727 For now, I'll punt and always expect VMS names, and hope for
730 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
731 { /* no recursion here! */
737 { /* not a directory spec */
742 bracket
= src
[slen
- 1];
744 /* If bracket is ']' or '>', bracket - 2 is the corresponding
746 ptr
= index (src
, bracket
- 2);
748 { /* no opening bracket */
752 if (!(rptr
= rindex (src
, '.')))
755 strncpy (dst
, src
, slen
);
759 dst
[slen
++] = bracket
;
764 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
765 then translate the device and recurse. */
766 if (dst
[slen
- 1] == ':'
767 && dst
[slen
- 2] != ':' /* skip decnet nodes */
768 && strcmp (src
+ slen
, "[000000]") == 0)
770 dst
[slen
- 1] = '\0';
771 if ((ptr
= egetenv (dst
))
772 && (rlen
= strlen (ptr
) - 1) > 0
773 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
774 && ptr
[rlen
- 1] == '.')
776 char * buf
= (char *) alloca (strlen (ptr
) + 1);
780 return directory_file_name (buf
, dst
);
785 strcat (dst
, "[000000]");
789 rlen
= strlen (rptr
) - 1;
790 strncat (dst
, rptr
, rlen
);
791 dst
[slen
+ rlen
] = '\0';
792 strcat (dst
, ".DIR.1");
796 /* Process as Unix format: just remove any final slash.
797 But leave "/" unchanged; do not change it to "". */
800 /* Handle // as root for apollo's. */
801 if ((slen
> 2 && dst
[slen
- 1] == '/')
802 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
806 && IS_DIRECTORY_SEP (dst
[slen
- 1])
808 && !IS_ANY_SEP (dst
[slen
- 2])
814 CORRECT_DIR_SEPS (dst
);
819 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
821 doc
: /* Returns the file name of the directory named DIRECTORY.
822 This is the name of the file that holds the data for the directory DIRECTORY.
823 This operation exists because a directory is also a file, but its name as
824 a directory is different from its name as a file.
825 In Unix-syntax, this function just removes the final slash.
826 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",
827 it returns a file name such as \"[X]Y.DIR.1\". */)
829 Lisp_Object directory
;
834 CHECK_STRING (directory
);
836 if (NILP (directory
))
839 /* If the file name has special constructs in it,
840 call the corresponding file handler. */
841 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
843 return call2 (handler
, Qdirectory_file_name
, directory
);
846 /* 20 extra chars is insufficient for VMS, since we might perform a
847 logical name translation. an equivalence string can be up to 255
848 chars long, so grab that much extra space... - sss */
849 buf
= (char *) alloca (SBYTES (directory
) + 20 + 255);
851 buf
= (char *) alloca (SBYTES (directory
) + 20);
853 directory_file_name (SDATA (directory
), buf
);
854 return make_specified_string (buf
, -1, strlen (buf
),
855 STRING_MULTIBYTE (directory
));
858 static char make_temp_name_tbl
[64] =
860 'A','B','C','D','E','F','G','H',
861 'I','J','K','L','M','N','O','P',
862 'Q','R','S','T','U','V','W','X',
863 'Y','Z','a','b','c','d','e','f',
864 'g','h','i','j','k','l','m','n',
865 'o','p','q','r','s','t','u','v',
866 'w','x','y','z','0','1','2','3',
867 '4','5','6','7','8','9','-','_'
870 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
872 /* Value is a temporary file name starting with PREFIX, a string.
874 The Emacs process number forms part of the result, so there is
875 no danger of generating a name being used by another process.
876 In addition, this function makes an attempt to choose a name
877 which has no existing file. To make this work, PREFIX should be
878 an absolute file name.
880 BASE64_P non-zero means add the pid as 3 characters in base64
881 encoding. In this case, 6 characters will be added to PREFIX to
882 form the file name. Otherwise, if Emacs is running on a system
883 with long file names, add the pid as a decimal number.
885 This function signals an error if no unique file name could be
889 make_temp_name (prefix
, base64_p
)
896 unsigned char *p
, *data
;
900 CHECK_STRING (prefix
);
902 /* VAL is created by adding 6 characters to PREFIX. The first
903 three are the PID of this process, in base 64, and the second
904 three are incremented if the file already exists. This ensures
905 262144 unique file names per PID per PREFIX. */
907 pid
= (int) getpid ();
911 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
912 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
913 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
918 #ifdef HAVE_LONG_FILE_NAMES
919 sprintf (pidbuf
, "%d", pid
);
920 pidlen
= strlen (pidbuf
);
922 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
923 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
924 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
929 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
930 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
931 if (!STRING_MULTIBYTE (prefix
))
932 STRING_SET_UNIBYTE (val
);
934 bcopy(SDATA (prefix
), data
, len
);
937 bcopy (pidbuf
, p
, pidlen
);
940 /* Here we try to minimize useless stat'ing when this function is
941 invoked many times successively with the same PREFIX. We achieve
942 this by initializing count to a random value, and incrementing it
945 We don't want make-temp-name to be called while dumping,
946 because then make_temp_name_count_initialized_p would get set
947 and then make_temp_name_count would not be set when Emacs starts. */
949 if (!make_temp_name_count_initialized_p
)
951 make_temp_name_count
= (unsigned) time (NULL
);
952 make_temp_name_count_initialized_p
= 1;
958 unsigned num
= make_temp_name_count
;
960 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
961 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
962 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
964 /* Poor man's congruential RN generator. Replace with
965 ++make_temp_name_count for debugging. */
966 make_temp_name_count
+= 25229;
967 make_temp_name_count
%= 225307;
969 if (stat (data
, &ignored
) < 0)
971 /* We want to return only if errno is ENOENT. */
975 /* The error here is dubious, but there is little else we
976 can do. The alternatives are to return nil, which is
977 as bad as (and in many cases worse than) throwing the
978 error, or to ignore the error, which will likely result
979 in looping through 225307 stat's, which is not only
980 dog-slow, but also useless since it will fallback to
981 the errow below, anyway. */
982 report_file_error ("Cannot create temporary name for prefix",
983 Fcons (prefix
, Qnil
));
988 error ("Cannot create temporary name for prefix `%s'",
994 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
995 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
996 The Emacs process number forms part of the result,
997 so there is no danger of generating a name being used by another process.
999 In addition, this function makes an attempt to choose a name
1000 which has no existing file. To make this work,
1001 PREFIX should be an absolute file name.
1003 There is a race condition between calling `make-temp-name' and creating the
1004 file which opens all kinds of security holes. For that reason, you should
1005 probably use `make-temp-file' instead, except in three circumstances:
1007 * If you are creating the file in the user's home directory.
1008 * If you are creating a directory rather than an ordinary file.
1009 * If you are taking special precautions as `make-temp-file' does. */)
1013 return make_temp_name (prefix
, 0);
1018 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1019 doc
: /* Convert filename NAME to absolute, and canonicalize it.
1020 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
1021 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
1022 the current buffer's value of default-directory is used.
1023 File name components that are `.' are removed, and
1024 so are file name components followed by `..', along with the `..' itself;
1025 note that these simplifications are done without checking the resulting
1026 file names in the file system.
1027 An initial `~/' expands to your home directory.
1028 An initial `~USER/' expands to USER's home directory.
1029 See also the function `substitute-in-file-name'. */)
1030 (name
, default_directory
)
1031 Lisp_Object name
, default_directory
;
1035 register unsigned char *newdir
, *p
, *o
;
1037 unsigned char *target
;
1040 unsigned char * colon
= 0;
1041 unsigned char * close
= 0;
1042 unsigned char * slash
= 0;
1043 unsigned char * brack
= 0;
1044 int lbrack
= 0, rbrack
= 0;
1049 int collapse_newdir
= 1;
1053 Lisp_Object handler
, result
;
1055 CHECK_STRING (name
);
1057 /* If the file name has special constructs in it,
1058 call the corresponding file handler. */
1059 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1060 if (!NILP (handler
))
1061 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1063 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1064 if (NILP (default_directory
))
1065 default_directory
= current_buffer
->directory
;
1066 if (! STRINGP (default_directory
))
1069 /* "/" is not considered a root directory on DOS_NT, so using "/"
1070 here causes an infinite recursion in, e.g., the following:
1072 (let (default-directory)
1073 (expand-file-name "a"))
1075 To avoid this, we set default_directory to the root of the
1077 extern char *emacs_root_dir (void);
1079 default_directory
= build_string (emacs_root_dir ());
1081 default_directory
= build_string ("/");
1085 if (!NILP (default_directory
))
1087 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1088 if (!NILP (handler
))
1089 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1092 o
= SDATA (default_directory
);
1094 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1095 It would be better to do this down below where we actually use
1096 default_directory. Unfortunately, calling Fexpand_file_name recursively
1097 could invoke GC, and the strings might be relocated. This would
1098 be annoying because we have pointers into strings lying around
1099 that would need adjusting, and people would add new pointers to
1100 the code and forget to adjust them, resulting in intermittent bugs.
1101 Putting this call here avoids all that crud.
1103 The EQ test avoids infinite recursion. */
1104 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1105 /* Save time in some common cases - as long as default_directory
1106 is not relative, it can be canonicalized with name below (if it
1107 is needed at all) without requiring it to be expanded now. */
1109 /* Detect MSDOS file names with drive specifiers. */
1110 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1112 /* Detect Windows file names in UNC format. */
1113 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1115 #else /* not DOS_NT */
1116 /* Detect Unix absolute file names (/... alone is not absolute on
1118 && ! (IS_DIRECTORY_SEP (o
[0]))
1119 #endif /* not DOS_NT */
1122 struct gcpro gcpro1
;
1125 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1129 name
= FILE_SYSTEM_CASE (name
);
1133 /* We will force directory separators to be either all \ or /, so make
1134 a local copy to modify, even if there ends up being no change. */
1135 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1137 /* Note if special escape prefix is present, but remove for now. */
1138 if (nm
[0] == '/' && nm
[1] == ':')
1144 /* Find and remove drive specifier if present; this makes nm absolute
1145 even if the rest of the name appears to be relative. Only look for
1146 drive specifier at the beginning. */
1147 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1154 /* If we see "c://somedir", we want to strip the first slash after the
1155 colon when stripping the drive letter. Otherwise, this expands to
1157 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1159 #endif /* WINDOWSNT */
1163 /* Discard any previous drive specifier if nm is now in UNC format. */
1164 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1170 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
1171 none are found, we can probably return right away. We will avoid
1172 allocating a new string if name is already fully expanded. */
1174 IS_DIRECTORY_SEP (nm
[0])
1176 && drive
&& !is_escaped
1179 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1186 /* If it turns out that the filename we want to return is just a
1187 suffix of FILENAME, we don't need to go through and edit
1188 things; we just need to construct a new string using data
1189 starting at the middle of FILENAME. If we set lose to a
1190 non-zero value, that means we've discovered that we can't do
1197 /* Since we know the name is absolute, we can assume that each
1198 element starts with a "/". */
1200 /* "." and ".." are hairy. */
1201 if (IS_DIRECTORY_SEP (p
[0])
1203 && (IS_DIRECTORY_SEP (p
[2])
1205 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1208 /* We want to replace multiple `/' in a row with a single
1211 && IS_DIRECTORY_SEP (p
[0])
1212 && IS_DIRECTORY_SEP (p
[1]))
1219 /* if dev:[dir]/, move nm to / */
1220 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1221 nm
= (brack
? brack
+ 1 : colon
+ 1);
1222 lbrack
= rbrack
= 0;
1229 #ifdef NO_HYPHENS_IN_FILENAMES
1230 if (lbrack
== rbrack
)
1232 /* Avoid clobbering negative version numbers. */
1237 #endif /* NO_HYPHENS_IN_FILENAMES */
1238 if (lbrack
> rbrack
&&
1239 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1240 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1242 #ifdef NO_HYPHENS_IN_FILENAMES
1245 #endif /* NO_HYPHENS_IN_FILENAMES */
1246 /* count open brackets, reset close bracket pointer */
1247 if (p
[0] == '[' || p
[0] == '<')
1248 lbrack
++, brack
= 0;
1249 /* count close brackets, set close bracket pointer */
1250 if (p
[0] == ']' || p
[0] == '>')
1251 rbrack
++, brack
= p
;
1252 /* detect ][ or >< */
1253 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1255 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1256 nm
= p
+ 1, lose
= 1;
1257 if (p
[0] == ':' && (colon
|| slash
))
1258 /* if dev1:[dir]dev2:, move nm to dev2: */
1264 /* if /name/dev:, move nm to dev: */
1267 /* if node::dev:, move colon following dev */
1268 else if (colon
&& colon
[-1] == ':')
1270 /* if dev1:dev2:, move nm to dev2: */
1271 else if (colon
&& colon
[-1] != ':')
1276 if (p
[0] == ':' && !colon
)
1282 if (lbrack
== rbrack
)
1285 else if (p
[0] == '.')
1293 if (index (nm
, '/'))
1295 nm
= sys_translate_unix (nm
);
1296 return make_specified_string (nm
, -1, strlen (nm
),
1297 STRING_MULTIBYTE (name
));
1301 /* Make sure directories are all separated with / or \ as
1302 desired, but avoid allocation of a new string when not
1304 CORRECT_DIR_SEPS (nm
);
1306 if (IS_DIRECTORY_SEP (nm
[1]))
1308 if (strcmp (nm
, SDATA (name
)) != 0)
1309 name
= make_specified_string (nm
, -1, strlen (nm
),
1310 STRING_MULTIBYTE (name
));
1314 /* drive must be set, so this is okay */
1315 if (strcmp (nm
- 2, SDATA (name
)) != 0)
1319 name
= make_specified_string (nm
, -1, p
- nm
,
1320 STRING_MULTIBYTE (name
));
1321 temp
[0] = DRIVE_LETTER (drive
);
1322 name
= concat2 (build_string (temp
), name
);
1325 #else /* not DOS_NT */
1326 if (nm
== SDATA (name
))
1328 return make_specified_string (nm
, -1, strlen (nm
),
1329 STRING_MULTIBYTE (name
));
1330 #endif /* not DOS_NT */
1334 /* At this point, nm might or might not be an absolute file name. We
1335 need to expand ~ or ~user if present, otherwise prefix nm with
1336 default_directory if nm is not absolute, and finally collapse /./
1337 and /foo/../ sequences.
1339 We set newdir to be the appropriate prefix if one is needed:
1340 - the relevant user directory if nm starts with ~ or ~user
1341 - the specified drive's working dir (DOS/NT only) if nm does not
1343 - the value of default_directory.
1345 Note that these prefixes are not guaranteed to be absolute (except
1346 for the working dir of a drive). Therefore, to ensure we always
1347 return an absolute name, if the final prefix is not absolute we
1348 append it to the current working directory. */
1352 if (nm
[0] == '~') /* prefix ~ */
1354 if (IS_DIRECTORY_SEP (nm
[1])
1358 || nm
[1] == 0) /* ~ by itself */
1360 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1361 newdir
= (unsigned char *) "";
1364 collapse_newdir
= 0;
1367 nm
++; /* Don't leave the slash in nm. */
1370 else /* ~user/filename */
1372 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1377 o
= (unsigned char *) alloca (p
- nm
+ 1);
1378 bcopy ((char *) nm
, o
, p
- nm
);
1381 pw
= (struct passwd
*) getpwnam (o
+ 1);
1384 newdir
= (unsigned char *) pw
-> pw_dir
;
1386 nm
= p
+ 1; /* skip the terminator */
1390 collapse_newdir
= 0;
1395 /* If we don't find a user of that name, leave the name
1396 unchanged; don't move nm forward to p. */
1401 /* On DOS and Windows, nm is absolute if a drive name was specified;
1402 use the drive's current directory as the prefix if needed. */
1403 if (!newdir
&& drive
)
1405 /* Get default directory if needed to make nm absolute. */
1406 if (!IS_DIRECTORY_SEP (nm
[0]))
1408 newdir
= alloca (MAXPATHLEN
+ 1);
1409 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1414 /* Either nm starts with /, or drive isn't mounted. */
1415 newdir
= alloca (4);
1416 newdir
[0] = DRIVE_LETTER (drive
);
1424 /* Finally, if no prefix has been specified and nm is not absolute,
1425 then it must be expanded relative to default_directory. */
1429 /* /... alone is not absolute on DOS and Windows. */
1430 && !IS_DIRECTORY_SEP (nm
[0])
1433 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1440 newdir
= SDATA (default_directory
);
1442 /* Note if special escape prefix is present, but remove for now. */
1443 if (newdir
[0] == '/' && newdir
[1] == ':')
1454 /* First ensure newdir is an absolute name. */
1456 /* Detect MSDOS file names with drive specifiers. */
1457 ! (IS_DRIVE (newdir
[0])
1458 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1460 /* Detect Windows file names in UNC format. */
1461 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1465 /* Effectively, let newdir be (expand-file-name newdir cwd).
1466 Because of the admonition against calling expand-file-name
1467 when we have pointers into lisp strings, we accomplish this
1468 indirectly by prepending newdir to nm if necessary, and using
1469 cwd (or the wd of newdir's drive) as the new newdir. */
1471 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1476 if (!IS_DIRECTORY_SEP (nm
[0]))
1478 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1479 file_name_as_directory (tmp
, newdir
);
1483 newdir
= alloca (MAXPATHLEN
+ 1);
1486 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1493 /* Strip off drive name from prefix, if present. */
1494 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1500 /* Keep only a prefix from newdir if nm starts with slash
1501 (//server/share for UNC, nothing otherwise). */
1502 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1505 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1507 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1509 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1511 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1523 /* Get rid of any slash at the end of newdir, unless newdir is
1524 just / or // (an incomplete UNC name). */
1525 length
= strlen (newdir
);
1526 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1528 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1532 unsigned char *temp
= (unsigned char *) alloca (length
);
1533 bcopy (newdir
, temp
, length
- 1);
1534 temp
[length
- 1] = 0;
1542 /* Now concatenate the directory and name to new space in the stack frame */
1543 tlen
+= strlen (nm
) + 1;
1545 /* Reserve space for drive specifier and escape prefix, since either
1546 or both may need to be inserted. (The Microsoft x86 compiler
1547 produces incorrect code if the following two lines are combined.) */
1548 target
= (unsigned char *) alloca (tlen
+ 4);
1550 #else /* not DOS_NT */
1551 target
= (unsigned char *) alloca (tlen
);
1552 #endif /* not DOS_NT */
1558 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1561 /* If newdir is effectively "C:/", then the drive letter will have
1562 been stripped and newdir will be "/". Concatenating with an
1563 absolute directory in nm produces "//", which will then be
1564 incorrectly treated as a network share. Ignore newdir in
1565 this case (keeping the drive letter). */
1566 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1567 && newdir
[1] == '\0'))
1569 strcpy (target
, newdir
);
1573 file_name_as_directory (target
, newdir
);
1576 strcat (target
, nm
);
1578 if (index (target
, '/'))
1579 strcpy (target
, sys_translate_unix (target
));
1582 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1584 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1593 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1599 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1600 /* brackets are offset from each other by 2 */
1603 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1604 /* convert [foo][bar] to [bar] */
1605 while (o
[-1] != '[' && o
[-1] != '<')
1607 else if (*p
== '-' && *o
!= '.')
1610 else if (p
[0] == '-' && o
[-1] == '.' &&
1611 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1612 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1616 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1617 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1619 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1621 /* else [foo.-] ==> [-] */
1625 #ifdef NO_HYPHENS_IN_FILENAMES
1627 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1628 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1630 #endif /* NO_HYPHENS_IN_FILENAMES */
1634 if (!IS_DIRECTORY_SEP (*p
))
1638 else if (IS_DIRECTORY_SEP (p
[0])
1640 && (IS_DIRECTORY_SEP (p
[2])
1643 /* If "/." is the entire filename, keep the "/". Otherwise,
1644 just delete the whole "/.". */
1645 if (o
== target
&& p
[2] == '\0')
1649 else if (IS_DIRECTORY_SEP (p
[0]) && p
[1] == '.' && p
[2] == '.'
1650 /* `/../' is the "superroot" on certain file systems. */
1652 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1654 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1656 /* Keep initial / only if this is the whole name. */
1657 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1662 && IS_DIRECTORY_SEP (p
[0]) && IS_DIRECTORY_SEP (p
[1]))
1664 /* Collapse multiple `/' in a row. */
1666 while (IS_DIRECTORY_SEP (*p
))
1673 #endif /* not VMS */
1677 /* At last, set drive name. */
1679 /* Except for network file name. */
1680 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1681 #endif /* WINDOWSNT */
1683 if (!drive
) abort ();
1685 target
[0] = DRIVE_LETTER (drive
);
1688 /* Reinsert the escape prefix if required. */
1695 CORRECT_DIR_SEPS (target
);
1698 result
= make_specified_string (target
, -1, o
- target
,
1699 STRING_MULTIBYTE (name
));
1701 /* Again look to see if the file name has special constructs in it
1702 and perhaps call the corresponding file handler. This is needed
1703 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1704 the ".." component gives us "/user@host:/bar/../baz" which needs
1705 to be expanded again. */
1706 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1707 if (!NILP (handler
))
1708 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1714 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1715 This is the old version of expand-file-name, before it was thoroughly
1716 rewritten for Emacs 10.31. We leave this version here commented-out,
1717 because the code is very complex and likely to have subtle bugs. If
1718 bugs _are_ found, it might be of interest to look at the old code and
1719 see what did it do in the relevant situation.
1721 Don't remove this code: it's true that it will be accessible via CVS,
1722 but a few years from deletion, people will forget it is there. */
1724 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1725 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1726 "Convert FILENAME to absolute, and canonicalize it.\n\
1727 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1728 (does not start with slash); if DEFAULT is nil or missing,\n\
1729 the current buffer's value of default-directory is used.\n\
1730 Filenames containing `.' or `..' as components are simplified;\n\
1731 initial `~/' expands to your home directory.\n\
1732 See also the function `substitute-in-file-name'.")
1734 Lisp_Object name
, defalt
;
1738 register unsigned char *newdir
, *p
, *o
;
1740 unsigned char *target
;
1744 unsigned char * colon
= 0;
1745 unsigned char * close
= 0;
1746 unsigned char * slash
= 0;
1747 unsigned char * brack
= 0;
1748 int lbrack
= 0, rbrack
= 0;
1752 CHECK_STRING (name
);
1755 /* Filenames on VMS are always upper case. */
1756 name
= Fupcase (name
);
1761 /* If nm is absolute, flush ...// and detect /./ and /../.
1762 If no /./ or /../ we can return right away. */
1774 if (p
[0] == '/' && p
[1] == '/'
1776 /* // at start of filename is meaningful on Apollo system. */
1781 if (p
[0] == '/' && p
[1] == '~')
1782 nm
= p
+ 1, lose
= 1;
1783 if (p
[0] == '/' && p
[1] == '.'
1784 && (p
[2] == '/' || p
[2] == 0
1785 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1791 /* if dev:[dir]/, move nm to / */
1792 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1793 nm
= (brack
? brack
+ 1 : colon
+ 1);
1794 lbrack
= rbrack
= 0;
1802 /* VMS pre V4.4,convert '-'s in filenames. */
1803 if (lbrack
== rbrack
)
1805 if (dots
< 2) /* this is to allow negative version numbers */
1810 if (lbrack
> rbrack
&&
1811 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1812 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1818 /* count open brackets, reset close bracket pointer */
1819 if (p
[0] == '[' || p
[0] == '<')
1820 lbrack
++, brack
= 0;
1821 /* count close brackets, set close bracket pointer */
1822 if (p
[0] == ']' || p
[0] == '>')
1823 rbrack
++, brack
= p
;
1824 /* detect ][ or >< */
1825 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1827 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1828 nm
= p
+ 1, lose
= 1;
1829 if (p
[0] == ':' && (colon
|| slash
))
1830 /* if dev1:[dir]dev2:, move nm to dev2: */
1836 /* If /name/dev:, move nm to dev: */
1839 /* If node::dev:, move colon following dev */
1840 else if (colon
&& colon
[-1] == ':')
1842 /* If dev1:dev2:, move nm to dev2: */
1843 else if (colon
&& colon
[-1] != ':')
1848 if (p
[0] == ':' && !colon
)
1854 if (lbrack
== rbrack
)
1857 else if (p
[0] == '.')
1865 if (index (nm
, '/'))
1866 return build_string (sys_translate_unix (nm
));
1868 if (nm
== SDATA (name
))
1870 return build_string (nm
);
1874 /* Now determine directory to start with and put it in NEWDIR */
1878 if (nm
[0] == '~') /* prefix ~ */
1883 || nm
[1] == 0)/* ~/filename */
1885 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1886 newdir
= (unsigned char *) "";
1889 nm
++; /* Don't leave the slash in nm. */
1892 else /* ~user/filename */
1894 /* Get past ~ to user */
1895 unsigned char *user
= nm
+ 1;
1896 /* Find end of name. */
1897 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1898 int len
= ptr
? ptr
- user
: strlen (user
);
1900 unsigned char *ptr1
= index (user
, ':');
1901 if (ptr1
!= 0 && ptr1
- user
< len
)
1904 /* Copy the user name into temp storage. */
1905 o
= (unsigned char *) alloca (len
+ 1);
1906 bcopy ((char *) user
, o
, len
);
1909 /* Look up the user name. */
1910 pw
= (struct passwd
*) getpwnam (o
+ 1);
1912 error ("\"%s\" isn't a registered user", o
+ 1);
1914 newdir
= (unsigned char *) pw
->pw_dir
;
1916 /* Discard the user name from NM. */
1923 #endif /* not VMS */
1927 defalt
= current_buffer
->directory
;
1928 CHECK_STRING (defalt
);
1929 newdir
= SDATA (defalt
);
1932 /* Now concatenate the directory and name to new space in the stack frame */
1934 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1935 target
= (unsigned char *) alloca (tlen
);
1941 if (nm
[0] == 0 || nm
[0] == '/')
1942 strcpy (target
, newdir
);
1945 file_name_as_directory (target
, newdir
);
1948 strcat (target
, nm
);
1950 if (index (target
, '/'))
1951 strcpy (target
, sys_translate_unix (target
));
1954 /* Now canonicalize by removing /. and /foo/.. if they appear */
1962 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1968 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1969 /* brackets are offset from each other by 2 */
1972 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1973 /* convert [foo][bar] to [bar] */
1974 while (o
[-1] != '[' && o
[-1] != '<')
1976 else if (*p
== '-' && *o
!= '.')
1979 else if (p
[0] == '-' && o
[-1] == '.' &&
1980 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1981 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1985 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1986 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1988 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1990 /* else [foo.-] ==> [-] */
1996 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1997 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
2007 else if (!strncmp (p
, "//", 2)
2009 /* // at start of filename is meaningful in Apollo system. */
2017 else if (p
[0] == '/' && p
[1] == '.' &&
2018 (p
[2] == '/' || p
[2] == 0))
2020 else if (!strncmp (p
, "/..", 3)
2021 /* `/../' is the "superroot" on certain file systems. */
2023 && (p
[3] == '/' || p
[3] == 0))
2025 while (o
!= target
&& *--o
!= '/')
2028 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
2032 if (o
== target
&& *o
== '/')
2040 #endif /* not VMS */
2043 return make_string (target
, o
- target
);
2047 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
2048 Ssubstitute_in_file_name
, 1, 1, 0,
2049 doc
: /* Substitute environment variables referred to in FILENAME.
2050 `$FOO' where FOO is an environment variable name means to substitute
2051 the value of that variable. The variable name should be terminated
2052 with a character not a letter, digit or underscore; otherwise, enclose
2053 the entire variable name in braces.
2054 If `/~' appears, all of FILENAME through that `/' is discarded.
2056 On VMS, `$' substitution is not done; this function does little and only
2057 duplicates what `expand-file-name' does. */)
2059 Lisp_Object filename
;
2063 register unsigned char *s
, *p
, *o
, *x
, *endp
;
2064 unsigned char *target
= NULL
;
2066 int substituted
= 0;
2069 Lisp_Object handler
;
2071 CHECK_STRING (filename
);
2073 /* If the file name has special constructs in it,
2074 call the corresponding file handler. */
2075 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
2076 if (!NILP (handler
))
2077 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
2079 nm
= SDATA (filename
);
2081 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
2082 CORRECT_DIR_SEPS (nm
);
2083 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
2085 endp
= nm
+ SBYTES (filename
);
2087 /* If /~ or // appears, discard everything through first slash. */
2089 for (p
= nm
; p
!= endp
; p
++)
2092 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2093 /* // at start of file name is meaningful in Apollo,
2094 WindowsNT and Cygwin systems. */
2095 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != nm
)
2096 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2097 || IS_DIRECTORY_SEP (p
[0])
2098 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2103 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2105 || IS_DIRECTORY_SEP (p
[-1])))
2107 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)
2112 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
2114 o
= (unsigned char *) alloca (s
- p
+ 1);
2115 bcopy ((char *) p
, o
, s
- p
);
2118 pw
= (struct passwd
*) getpwnam (o
+ 1);
2120 /* If we have ~/ or ~user and `user' exists, discard
2121 everything up to ~. But if `user' does not exist, leave
2122 ~user alone, it might be a literal file name. */
2123 if (IS_DIRECTORY_SEP (p
[0]) || s
== p
+ 1 || pw
)
2130 /* see comment in expand-file-name about drive specifiers */
2131 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2132 && p
> nm
&& IS_DIRECTORY_SEP (p
[-1]))
2141 return make_specified_string (nm
, -1, strlen (nm
),
2142 STRING_MULTIBYTE (filename
));
2145 /* See if any variables are substituted into the string
2146 and find the total length of their values in `total' */
2148 for (p
= nm
; p
!= endp
;)
2158 /* "$$" means a single "$" */
2167 while (p
!= endp
&& *p
!= '}') p
++;
2168 if (*p
!= '}') goto missingclose
;
2174 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2178 /* Copy out the variable name */
2179 target
= (unsigned char *) alloca (s
- o
+ 1);
2180 strncpy (target
, o
, s
- o
);
2183 strupr (target
); /* $home == $HOME etc. */
2186 /* Get variable value */
2187 o
= (unsigned char *) egetenv (target
);
2190 total
+= strlen (o
);
2200 /* If substitution required, recopy the string and do it */
2201 /* Make space in stack frame for the new copy */
2202 xnm
= (unsigned char *) alloca (SBYTES (filename
) + total
+ 1);
2205 /* Copy the rest of the name through, replacing $ constructs with values */
2222 while (p
!= endp
&& *p
!= '}') p
++;
2223 if (*p
!= '}') goto missingclose
;
2229 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2233 /* Copy out the variable name */
2234 target
= (unsigned char *) alloca (s
- o
+ 1);
2235 strncpy (target
, o
, s
- o
);
2238 strupr (target
); /* $home == $HOME etc. */
2241 /* Get variable value */
2242 o
= (unsigned char *) egetenv (target
);
2246 strcpy (x
, target
); x
+= strlen (target
);
2248 else if (STRING_MULTIBYTE (filename
))
2250 /* If the original string is multibyte,
2251 convert what we substitute into multibyte. */
2255 c
= unibyte_char_to_multibyte (c
);
2256 x
+= CHAR_STRING (c
, x
);
2268 /* If /~ or // appears, discard everything through first slash. */
2270 for (p
= xnm
; p
!= x
; p
++)
2272 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2273 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != xnm
)
2274 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2275 || IS_DIRECTORY_SEP (p
[0])
2276 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2278 && p
!= xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2281 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2282 && p
> xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2286 return make_specified_string (xnm
, -1, x
- xnm
, STRING_MULTIBYTE (filename
));
2289 error ("Bad format environment-variable substitution");
2291 error ("Missing \"}\" in environment-variable substitution");
2293 error ("Substituting nonexistent environment variable \"%s\"", target
);
2296 #endif /* not VMS */
2300 /* A slightly faster and more convenient way to get
2301 (directory-file-name (expand-file-name FOO)). */
2304 expand_and_dir_to_file (filename
, defdir
)
2305 Lisp_Object filename
, defdir
;
2307 register Lisp_Object absname
;
2309 absname
= Fexpand_file_name (filename
, defdir
);
2312 register int c
= SREF (absname
, SBYTES (absname
) - 1);
2313 if (c
== ':' || c
== ']' || c
== '>')
2314 absname
= Fdirectory_file_name (absname
);
2317 /* Remove final slash, if any (unless this is the root dir).
2318 stat behaves differently depending! */
2319 if (SCHARS (absname
) > 1
2320 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
2321 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
2322 /* We cannot take shortcuts; they might be wrong for magic file names. */
2323 absname
= Fdirectory_file_name (absname
);
2328 /* Signal an error if the file ABSNAME already exists.
2329 If INTERACTIVE is nonzero, ask the user whether to proceed,
2330 and bypass the error if the user says to go ahead.
2331 QUERYSTRING is a name for the action that is being considered
2334 *STATPTR is used to store the stat information if the file exists.
2335 If the file does not exist, STATPTR->st_mode is set to 0.
2336 If STATPTR is null, we don't store into it.
2338 If QUICK is nonzero, we ask for y or n, not yes or no. */
2341 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2342 Lisp_Object absname
;
2343 unsigned char *querystring
;
2345 struct stat
*statptr
;
2348 register Lisp_Object tem
, encoded_filename
;
2349 struct stat statbuf
;
2350 struct gcpro gcpro1
;
2352 encoded_filename
= ENCODE_FILE (absname
);
2354 /* stat is a good way to tell whether the file exists,
2355 regardless of what access permissions it has. */
2356 if (lstat (SDATA (encoded_filename
), &statbuf
) >= 0)
2359 Fsignal (Qfile_already_exists
,
2360 Fcons (build_string ("File already exists"),
2361 Fcons (absname
, Qnil
)));
2363 tem
= format2 ("File %s already exists; %s anyway? ",
2364 absname
, build_string (querystring
));
2366 tem
= Fy_or_n_p (tem
);
2368 tem
= do_yes_or_no_p (tem
);
2371 Fsignal (Qfile_already_exists
,
2372 Fcons (build_string ("File already exists"),
2373 Fcons (absname
, Qnil
)));
2380 statptr
->st_mode
= 0;
2385 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 4,
2386 "fCopy file: \nFCopy %s to file: \np\nP",
2387 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
2388 If NEWNAME names a directory, copy FILE there.
2389 Signals a `file-already-exists' error if file NEWNAME already exists,
2390 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
2391 A number as third arg means request confirmation if NEWNAME already exists.
2392 This is what happens in interactive use with M-x.
2393 Always sets the file modes of the output file to match the input file.
2394 Fourth arg KEEP-TIME non-nil means give the output file the same
2395 last-modified time as the old one. (This works on only some systems.)
2396 A prefix arg makes KEEP-TIME non-nil. */)
2397 (file
, newname
, ok_if_already_exists
, keep_time
)
2398 Lisp_Object file
, newname
, ok_if_already_exists
, keep_time
;
2401 char buf
[16 * 1024];
2402 struct stat st
, out_st
;
2403 Lisp_Object handler
;
2404 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2405 int count
= SPECPDL_INDEX ();
2406 int input_file_statable_p
;
2407 Lisp_Object encoded_file
, encoded_newname
;
2409 encoded_file
= encoded_newname
= Qnil
;
2410 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2411 CHECK_STRING (file
);
2412 CHECK_STRING (newname
);
2414 if (!NILP (Ffile_directory_p (newname
)))
2415 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2417 newname
= Fexpand_file_name (newname
, Qnil
);
2419 file
= Fexpand_file_name (file
, Qnil
);
2421 /* If the input file name has special constructs in it,
2422 call the corresponding file handler. */
2423 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2424 /* Likewise for output file name. */
2426 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2427 if (!NILP (handler
))
2428 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2429 ok_if_already_exists
, keep_time
));
2431 encoded_file
= ENCODE_FILE (file
);
2432 encoded_newname
= ENCODE_FILE (newname
);
2434 if (NILP (ok_if_already_exists
)
2435 || INTEGERP (ok_if_already_exists
))
2436 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2437 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2438 else if (stat (SDATA (encoded_newname
), &out_st
) < 0)
2442 if (!CopyFile (SDATA (encoded_file
),
2443 SDATA (encoded_newname
),
2445 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
2446 /* CopyFile retains the timestamp by default. */
2447 else if (NILP (keep_time
))
2453 EMACS_GET_TIME (now
);
2454 filename
= SDATA (encoded_newname
);
2456 /* Ensure file is writable while its modified time is set. */
2457 attributes
= GetFileAttributes (filename
);
2458 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
2459 if (set_file_times (filename
, now
, now
))
2461 /* Restore original attributes. */
2462 SetFileAttributes (filename
, attributes
);
2463 Fsignal (Qfile_date_error
,
2464 Fcons (build_string ("Cannot set file date"),
2465 Fcons (newname
, Qnil
)));
2467 /* Restore original attributes. */
2468 SetFileAttributes (filename
, attributes
);
2470 #else /* not WINDOWSNT */
2472 ifd
= emacs_open (SDATA (encoded_file
), O_RDONLY
, 0);
2476 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2478 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2480 /* We can only copy regular files and symbolic links. Other files are not
2482 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2484 #if !defined (DOS_NT) || __DJGPP__ > 1
2485 if (out_st
.st_mode
!= 0
2486 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2489 report_file_error ("Input and output files are the same",
2490 Fcons (file
, Fcons (newname
, Qnil
)));
2494 #if defined (S_ISREG) && defined (S_ISLNK)
2495 if (input_file_statable_p
)
2497 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2499 #if defined (EISDIR)
2500 /* Get a better looking error message. */
2503 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2506 #endif /* S_ISREG && S_ISLNK */
2509 /* Create the copy file with the same record format as the input file */
2510 ofd
= sys_creat (SDATA (encoded_newname
), 0666, ifd
);
2513 /* System's default file type was set to binary by _fmode in emacs.c. */
2514 ofd
= creat (SDATA (encoded_newname
), S_IREAD
| S_IWRITE
);
2515 #else /* not MSDOS */
2516 ofd
= creat (SDATA (encoded_newname
), 0666);
2517 #endif /* not MSDOS */
2520 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2522 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2526 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2527 if (emacs_write (ofd
, buf
, n
) != n
)
2528 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2531 /* Closing the output clobbers the file times on some systems. */
2532 if (emacs_close (ofd
) < 0)
2533 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2535 if (input_file_statable_p
)
2537 if (!NILP (keep_time
))
2539 EMACS_TIME atime
, mtime
;
2540 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2541 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2542 if (set_file_times (SDATA (encoded_newname
),
2544 Fsignal (Qfile_date_error
,
2545 Fcons (build_string ("Cannot set file date"),
2546 Fcons (newname
, Qnil
)));
2549 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2551 #if defined (__DJGPP__) && __DJGPP__ > 1
2552 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2553 and if it can't, it tells so. Otherwise, under MSDOS we usually
2554 get only the READ bit, which will make the copied file read-only,
2555 so it's better not to chmod at all. */
2556 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2557 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2558 #endif /* DJGPP version 2 or newer */
2563 #endif /* WINDOWSNT */
2565 /* Discard the unwind protects. */
2566 specpdl_ptr
= specpdl
+ count
;
2572 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2573 Smake_directory_internal
, 1, 1, 0,
2574 doc
: /* Create a new directory named DIRECTORY. */)
2576 Lisp_Object directory
;
2578 const unsigned char *dir
;
2579 Lisp_Object handler
;
2580 Lisp_Object encoded_dir
;
2582 CHECK_STRING (directory
);
2583 directory
= Fexpand_file_name (directory
, Qnil
);
2585 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2586 if (!NILP (handler
))
2587 return call2 (handler
, Qmake_directory_internal
, directory
);
2589 encoded_dir
= ENCODE_FILE (directory
);
2591 dir
= SDATA (encoded_dir
);
2594 if (mkdir (dir
) != 0)
2596 if (mkdir (dir
, 0777) != 0)
2598 report_file_error ("Creating directory", Flist (1, &directory
));
2603 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2604 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2606 Lisp_Object directory
;
2608 const unsigned char *dir
;
2609 Lisp_Object handler
;
2610 Lisp_Object encoded_dir
;
2612 CHECK_STRING (directory
);
2613 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2615 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2616 if (!NILP (handler
))
2617 return call2 (handler
, Qdelete_directory
, directory
);
2619 encoded_dir
= ENCODE_FILE (directory
);
2621 dir
= SDATA (encoded_dir
);
2623 if (rmdir (dir
) != 0)
2624 report_file_error ("Removing directory", Flist (1, &directory
));
2629 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2630 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2631 If file has multiple names, it continues to exist with the other names. */)
2633 Lisp_Object filename
;
2635 Lisp_Object handler
;
2636 Lisp_Object encoded_file
;
2637 struct gcpro gcpro1
;
2640 if (!NILP (Ffile_directory_p (filename
))
2641 && NILP (Ffile_symlink_p (filename
)))
2642 Fsignal (Qfile_error
,
2643 Fcons (build_string ("Removing old name: is a directory"),
2644 Fcons (filename
, Qnil
)));
2646 filename
= Fexpand_file_name (filename
, Qnil
);
2648 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2649 if (!NILP (handler
))
2650 return call2 (handler
, Qdelete_file
, filename
);
2652 encoded_file
= ENCODE_FILE (filename
);
2654 if (0 > unlink (SDATA (encoded_file
)))
2655 report_file_error ("Removing old name", Flist (1, &filename
));
2660 internal_delete_file_1 (ignore
)
2666 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2669 internal_delete_file (filename
)
2670 Lisp_Object filename
;
2672 return NILP (internal_condition_case_1 (Fdelete_file
, filename
,
2673 Qt
, internal_delete_file_1
));
2676 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2677 "fRename file: \nFRename %s to file: \np",
2678 doc
: /* Rename FILE as NEWNAME. Both args strings.
2679 If file has names other than FILE, it continues to have those names.
2680 Signals a `file-already-exists' error if a file NEWNAME already exists
2681 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2682 A number as third arg means request confirmation if NEWNAME already exists.
2683 This is what happens in interactive use with M-x. */)
2684 (file
, newname
, ok_if_already_exists
)
2685 Lisp_Object file
, newname
, ok_if_already_exists
;
2688 Lisp_Object args
[2];
2690 Lisp_Object handler
;
2691 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2692 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2694 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2695 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2696 CHECK_STRING (file
);
2697 CHECK_STRING (newname
);
2698 file
= Fexpand_file_name (file
, Qnil
);
2699 newname
= Fexpand_file_name (newname
, Qnil
);
2701 /* If the file name has special constructs in it,
2702 call the corresponding file handler. */
2703 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2705 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2706 if (!NILP (handler
))
2707 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2708 file
, newname
, ok_if_already_exists
));
2710 encoded_file
= ENCODE_FILE (file
);
2711 encoded_newname
= ENCODE_FILE (newname
);
2714 /* If the file names are identical but for the case, don't ask for
2715 confirmation: they simply want to change the letter-case of the
2717 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2719 if (NILP (ok_if_already_exists
)
2720 || INTEGERP (ok_if_already_exists
))
2721 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2722 INTEGERP (ok_if_already_exists
), 0, 0);
2724 if (0 > rename (SDATA (encoded_file
), SDATA (encoded_newname
)))
2726 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
))
2727 || 0 > unlink (SDATA (encoded_file
)))
2733 symlink_target
= Ffile_symlink_p (file
);
2734 if (! NILP (symlink_target
))
2735 Fmake_symbolic_link (symlink_target
, newname
,
2736 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2739 Fcopy_file (file
, newname
,
2740 /* We have already prompted if it was an integer,
2741 so don't have copy-file prompt again. */
2742 NILP (ok_if_already_exists
) ? Qnil
: Qt
, Qt
);
2743 Fdelete_file (file
);
2750 report_file_error ("Renaming", Flist (2, args
));
2753 report_file_error ("Renaming", Flist (2, &file
));
2760 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2761 "fAdd name to file: \nFName to add to %s: \np",
2762 doc
: /* Give FILE additional name NEWNAME. Both args strings.
2763 Signals a `file-already-exists' error if a file NEWNAME already exists
2764 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2765 A number as third arg means request confirmation if NEWNAME already exists.
2766 This is what happens in interactive use with M-x. */)
2767 (file
, newname
, ok_if_already_exists
)
2768 Lisp_Object file
, newname
, ok_if_already_exists
;
2771 Lisp_Object args
[2];
2773 Lisp_Object handler
;
2774 Lisp_Object encoded_file
, encoded_newname
;
2775 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2777 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2778 encoded_file
= encoded_newname
= Qnil
;
2779 CHECK_STRING (file
);
2780 CHECK_STRING (newname
);
2781 file
= Fexpand_file_name (file
, Qnil
);
2782 newname
= Fexpand_file_name (newname
, Qnil
);
2784 /* If the file name has special constructs in it,
2785 call the corresponding file handler. */
2786 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2787 if (!NILP (handler
))
2788 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2789 newname
, ok_if_already_exists
));
2791 /* If the new name has special constructs in it,
2792 call the corresponding file handler. */
2793 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2794 if (!NILP (handler
))
2795 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2796 newname
, ok_if_already_exists
));
2798 encoded_file
= ENCODE_FILE (file
);
2799 encoded_newname
= ENCODE_FILE (newname
);
2801 if (NILP (ok_if_already_exists
)
2802 || INTEGERP (ok_if_already_exists
))
2803 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2804 INTEGERP (ok_if_already_exists
), 0, 0);
2806 unlink (SDATA (newname
));
2807 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
)))
2812 report_file_error ("Adding new name", Flist (2, args
));
2814 report_file_error ("Adding new name", Flist (2, &file
));
2823 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2824 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np",
2825 doc
: /* Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
2826 Signals a `file-already-exists' error if a file LINKNAME already exists
2827 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2828 A number as third arg means request confirmation if LINKNAME already exists.
2829 This happens for interactive use with M-x. */)
2830 (filename
, linkname
, ok_if_already_exists
)
2831 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2834 Lisp_Object args
[2];
2836 Lisp_Object handler
;
2837 Lisp_Object encoded_filename
, encoded_linkname
;
2838 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2840 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2841 encoded_filename
= encoded_linkname
= Qnil
;
2842 CHECK_STRING (filename
);
2843 CHECK_STRING (linkname
);
2844 /* If the link target has a ~, we must expand it to get
2845 a truly valid file name. Otherwise, do not expand;
2846 we want to permit links to relative file names. */
2847 if (SREF (filename
, 0) == '~')
2848 filename
= Fexpand_file_name (filename
, Qnil
);
2849 linkname
= Fexpand_file_name (linkname
, Qnil
);
2851 /* If the file name has special constructs in it,
2852 call the corresponding file handler. */
2853 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2854 if (!NILP (handler
))
2855 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2856 linkname
, ok_if_already_exists
));
2858 /* If the new link name has special constructs in it,
2859 call the corresponding file handler. */
2860 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2861 if (!NILP (handler
))
2862 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2863 linkname
, ok_if_already_exists
));
2865 encoded_filename
= ENCODE_FILE (filename
);
2866 encoded_linkname
= ENCODE_FILE (linkname
);
2868 if (NILP (ok_if_already_exists
)
2869 || INTEGERP (ok_if_already_exists
))
2870 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2871 INTEGERP (ok_if_already_exists
), 0, 0);
2872 if (0 > symlink (SDATA (encoded_filename
),
2873 SDATA (encoded_linkname
)))
2875 /* If we didn't complain already, silently delete existing file. */
2876 if (errno
== EEXIST
)
2878 unlink (SDATA (encoded_linkname
));
2879 if (0 <= symlink (SDATA (encoded_filename
),
2880 SDATA (encoded_linkname
)))
2890 report_file_error ("Making symbolic link", Flist (2, args
));
2892 report_file_error ("Making symbolic link", Flist (2, &filename
));
2898 #endif /* S_IFLNK */
2902 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2903 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2904 doc
: /* Define the job-wide logical name NAME to have the value STRING.
2905 If STRING is nil or a null string, the logical name NAME is deleted. */)
2910 CHECK_STRING (name
);
2912 delete_logical_name (SDATA (name
));
2915 CHECK_STRING (string
);
2917 if (SCHARS (string
) == 0)
2918 delete_logical_name (SDATA (name
));
2920 define_logical_name (SDATA (name
), SDATA (string
));
2929 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
2930 doc
: /* Open a network connection to PATH using LOGIN as the login string. */)
2932 Lisp_Object path
, login
;
2936 CHECK_STRING (path
);
2937 CHECK_STRING (login
);
2939 netresult
= netunam (SDATA (path
), SDATA (login
));
2941 if (netresult
== -1)
2946 #endif /* HPUX_NET */
2948 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2950 doc
: /* Return t if file FILENAME specifies an absolute file name.
2951 On Unix, this is a name starting with a `/' or a `~'. */)
2953 Lisp_Object filename
;
2955 const unsigned char *ptr
;
2957 CHECK_STRING (filename
);
2958 ptr
= SDATA (filename
);
2959 if (IS_DIRECTORY_SEP (*ptr
) || *ptr
== '~'
2961 /* ??? This criterion is probably wrong for '<'. */
2962 || index (ptr
, ':') || index (ptr
, '<')
2963 || (*ptr
== '[' && (ptr
[1] != '-' || (ptr
[2] != '.' && ptr
[2] != ']'))
2967 || (IS_DRIVE (*ptr
) && ptr
[1] == ':' && IS_DIRECTORY_SEP (ptr
[2]))
2975 /* Return nonzero if file FILENAME exists and can be executed. */
2978 check_executable (filename
)
2982 int len
= strlen (filename
);
2985 if (stat (filename
, &st
) < 0)
2987 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
2988 return ((st
.st_mode
& S_IEXEC
) != 0);
2990 return (S_ISREG (st
.st_mode
)
2992 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
2993 || stricmp (suffix
, ".exe") == 0
2994 || stricmp (suffix
, ".bat") == 0)
2995 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2996 #endif /* not WINDOWSNT */
2997 #else /* not DOS_NT */
2998 #ifdef HAVE_EUIDACCESS
2999 return (euidaccess (filename
, 1) >= 0);
3001 /* Access isn't quite right because it uses the real uid
3002 and we really want to test with the effective uid.
3003 But Unix doesn't give us a right way to do it. */
3004 return (access (filename
, 1) >= 0);
3006 #endif /* not DOS_NT */
3009 /* Return nonzero if file FILENAME exists and can be written. */
3012 check_writable (filename
)
3017 if (stat (filename
, &st
) < 0)
3019 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3020 #else /* not MSDOS */
3021 #ifdef HAVE_EUIDACCESS
3022 return (euidaccess (filename
, 2) >= 0);
3024 /* Access isn't quite right because it uses the real uid
3025 and we really want to test with the effective uid.
3026 But Unix doesn't give us a right way to do it.
3027 Opening with O_WRONLY could work for an ordinary file,
3028 but would lose for directories. */
3029 return (access (filename
, 2) >= 0);
3031 #endif /* not MSDOS */
3034 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
3035 doc
: /* Return t if file FILENAME exists. (This does not mean you can read it.)
3036 See also `file-readable-p' and `file-attributes'. */)
3038 Lisp_Object filename
;
3040 Lisp_Object absname
;
3041 Lisp_Object handler
;
3042 struct stat statbuf
;
3044 CHECK_STRING (filename
);
3045 absname
= Fexpand_file_name (filename
, Qnil
);
3047 /* If the file name has special constructs in it,
3048 call the corresponding file handler. */
3049 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
3050 if (!NILP (handler
))
3051 return call2 (handler
, Qfile_exists_p
, absname
);
3053 absname
= ENCODE_FILE (absname
);
3055 return (stat (SDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
3058 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
3059 doc
: /* Return t if FILENAME can be executed by you.
3060 For a directory, this means you can access files in that directory. */)
3062 Lisp_Object filename
;
3064 Lisp_Object absname
;
3065 Lisp_Object handler
;
3067 CHECK_STRING (filename
);
3068 absname
= Fexpand_file_name (filename
, Qnil
);
3070 /* If the file name has special constructs in it,
3071 call the corresponding file handler. */
3072 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
3073 if (!NILP (handler
))
3074 return call2 (handler
, Qfile_executable_p
, absname
);
3076 absname
= ENCODE_FILE (absname
);
3078 return (check_executable (SDATA (absname
)) ? Qt
: Qnil
);
3081 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
3082 doc
: /* Return t if file FILENAME exists and you can read it.
3083 See also `file-exists-p' and `file-attributes'. */)
3085 Lisp_Object filename
;
3087 Lisp_Object absname
;
3088 Lisp_Object handler
;
3091 struct stat statbuf
;
3093 CHECK_STRING (filename
);
3094 absname
= Fexpand_file_name (filename
, Qnil
);
3096 /* If the file name has special constructs in it,
3097 call the corresponding file handler. */
3098 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
3099 if (!NILP (handler
))
3100 return call2 (handler
, Qfile_readable_p
, absname
);
3102 absname
= ENCODE_FILE (absname
);
3104 #if defined(DOS_NT) || defined(macintosh)
3105 /* Under MS-DOS, Windows, and Macintosh, open does not work for
3107 if (access (SDATA (absname
), 0) == 0)
3110 #else /* not DOS_NT and not macintosh */
3112 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
3113 /* Opening a fifo without O_NONBLOCK can wait.
3114 We don't want to wait. But we don't want to mess wth O_NONBLOCK
3115 except in the case of a fifo, on a system which handles it. */
3116 desc
= stat (SDATA (absname
), &statbuf
);
3119 if (S_ISFIFO (statbuf
.st_mode
))
3120 flags
|= O_NONBLOCK
;
3122 desc
= emacs_open (SDATA (absname
), flags
, 0);
3127 #endif /* not DOS_NT and not macintosh */
3130 /* Having this before file-symlink-p mysteriously caused it to be forgotten
3132 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
3133 doc
: /* Return t if file FILENAME can be written or created by you. */)
3135 Lisp_Object filename
;
3137 Lisp_Object absname
, dir
, encoded
;
3138 Lisp_Object handler
;
3139 struct stat statbuf
;
3141 CHECK_STRING (filename
);
3142 absname
= Fexpand_file_name (filename
, Qnil
);
3144 /* If the file name has special constructs in it,
3145 call the corresponding file handler. */
3146 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
3147 if (!NILP (handler
))
3148 return call2 (handler
, Qfile_writable_p
, absname
);
3150 encoded
= ENCODE_FILE (absname
);
3151 if (stat (SDATA (encoded
), &statbuf
) >= 0)
3152 return (check_writable (SDATA (encoded
))
3155 dir
= Ffile_name_directory (absname
);
3158 dir
= Fdirectory_file_name (dir
);
3162 dir
= Fdirectory_file_name (dir
);
3165 dir
= ENCODE_FILE (dir
);
3167 /* The read-only attribute of the parent directory doesn't affect
3168 whether a file or directory can be created within it. Some day we
3169 should check ACLs though, which do affect this. */
3170 if (stat (SDATA (dir
), &statbuf
) < 0)
3172 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3174 return (check_writable (!NILP (dir
) ? (char *) SDATA (dir
) : "")
3179 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3180 doc
: /* Access file FILENAME, and get an error if that does not work.
3181 The second argument STRING is used in the error message.
3182 If there is no error, we return nil. */)
3184 Lisp_Object filename
, string
;
3186 Lisp_Object handler
, encoded_filename
, absname
;
3189 CHECK_STRING (filename
);
3190 absname
= Fexpand_file_name (filename
, Qnil
);
3192 CHECK_STRING (string
);
3194 /* If the file name has special constructs in it,
3195 call the corresponding file handler. */
3196 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
3197 if (!NILP (handler
))
3198 return call3 (handler
, Qaccess_file
, absname
, string
);
3200 encoded_filename
= ENCODE_FILE (absname
);
3202 fd
= emacs_open (SDATA (encoded_filename
), O_RDONLY
, 0);
3204 report_file_error (SDATA (string
), Fcons (filename
, Qnil
));
3210 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3211 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
3212 The value is the link target, as a string.
3213 Otherwise returns nil. */)
3215 Lisp_Object filename
;
3217 Lisp_Object handler
;
3219 CHECK_STRING (filename
);
3220 filename
= Fexpand_file_name (filename
, Qnil
);
3222 /* If the file name has special constructs in it,
3223 call the corresponding file handler. */
3224 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3225 if (!NILP (handler
))
3226 return call2 (handler
, Qfile_symlink_p
, filename
);
3235 filename
= ENCODE_FILE (filename
);
3242 buf
= (char *) xrealloc (buf
, bufsize
);
3243 bzero (buf
, bufsize
);
3246 valsize
= readlink (SDATA (filename
), buf
, bufsize
);
3250 /* HP-UX reports ERANGE if buffer is too small. */
3251 if (errno
== ERANGE
)
3261 while (valsize
>= bufsize
);
3263 val
= make_string (buf
, valsize
);
3264 if (buf
[0] == '/' && index (buf
, ':'))
3265 val
= concat2 (build_string ("/:"), val
);
3267 val
= DECODE_FILE (val
);
3270 #else /* not S_IFLNK */
3272 #endif /* not S_IFLNK */
3275 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3276 doc
: /* Return t if FILENAME names an existing directory.
3277 Symbolic links to directories count as directories.
3278 See `file-symlink-p' to distinguish symlinks. */)
3280 Lisp_Object filename
;
3282 register Lisp_Object absname
;
3284 Lisp_Object handler
;
3286 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3288 /* If the file name has special constructs in it,
3289 call the corresponding file handler. */
3290 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3291 if (!NILP (handler
))
3292 return call2 (handler
, Qfile_directory_p
, absname
);
3294 absname
= ENCODE_FILE (absname
);
3296 if (stat (SDATA (absname
), &st
) < 0)
3298 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3301 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3302 doc
: /* Return t if file FILENAME names a directory you can open.
3303 For the value to be t, FILENAME must specify the name of a directory as a file,
3304 and the directory must allow you to open files in it. In order to use a
3305 directory as a buffer's current directory, this predicate must return true.
3306 A directory name spec may be given instead; then the value is t
3307 if the directory so specified exists and really is a readable and
3308 searchable directory. */)
3310 Lisp_Object filename
;
3312 Lisp_Object handler
;
3314 struct gcpro gcpro1
;
3316 /* If the file name has special constructs in it,
3317 call the corresponding file handler. */
3318 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3319 if (!NILP (handler
))
3320 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3323 tem
= (NILP (Ffile_directory_p (filename
))
3324 || NILP (Ffile_executable_p (filename
)));
3326 return tem
? Qnil
: Qt
;
3329 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3330 doc
: /* Return t if file FILENAME is the name of a regular file.
3331 This is the sort of file that holds an ordinary stream of data bytes. */)
3333 Lisp_Object filename
;
3335 register Lisp_Object absname
;
3337 Lisp_Object handler
;
3339 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3341 /* If the file name has special constructs in it,
3342 call the corresponding file handler. */
3343 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3344 if (!NILP (handler
))
3345 return call2 (handler
, Qfile_regular_p
, absname
);
3347 absname
= ENCODE_FILE (absname
);
3352 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3354 /* Tell stat to use expensive method to get accurate info. */
3355 Vw32_get_true_file_attributes
= Qt
;
3356 result
= stat (SDATA (absname
), &st
);
3357 Vw32_get_true_file_attributes
= tem
;
3361 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3364 if (stat (SDATA (absname
), &st
) < 0)
3366 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3370 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3371 doc
: /* Return mode bits of file named FILENAME, as an integer.
3372 Return nil, if file does not exist or is not accessible. */)
3374 Lisp_Object filename
;
3376 Lisp_Object absname
;
3378 Lisp_Object handler
;
3380 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3382 /* If the file name has special constructs in it,
3383 call the corresponding file handler. */
3384 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3385 if (!NILP (handler
))
3386 return call2 (handler
, Qfile_modes
, absname
);
3388 absname
= ENCODE_FILE (absname
);
3390 if (stat (SDATA (absname
), &st
) < 0)
3392 #if defined (MSDOS) && __DJGPP__ < 2
3393 if (check_executable (SDATA (absname
)))
3394 st
.st_mode
|= S_IEXEC
;
3395 #endif /* MSDOS && __DJGPP__ < 2 */
3397 return make_number (st
.st_mode
& 07777);
3400 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3401 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
3402 Only the 12 low bits of MODE are used. */)
3404 Lisp_Object filename
, mode
;
3406 Lisp_Object absname
, encoded_absname
;
3407 Lisp_Object handler
;
3409 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3410 CHECK_NUMBER (mode
);
3412 /* If the file name has special constructs in it,
3413 call the corresponding file handler. */
3414 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3415 if (!NILP (handler
))
3416 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3418 encoded_absname
= ENCODE_FILE (absname
);
3420 if (chmod (SDATA (encoded_absname
), XINT (mode
)) < 0)
3421 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3426 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3427 doc
: /* Set the file permission bits for newly created files.
3428 The argument MODE should be an integer; only the low 9 bits are used.
3429 This setting is inherited by subprocesses. */)
3433 CHECK_NUMBER (mode
);
3435 umask ((~ XINT (mode
)) & 0777);
3440 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3441 doc
: /* Return the default file protection for created files.
3442 The value is an integer. */)
3448 realmask
= umask (0);
3451 XSETINT (value
, (~ realmask
) & 0777);
3455 extern int lisp_time_argument
P_ ((Lisp_Object
, time_t *, int *));
3457 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3458 doc
: /* Set times of file FILENAME to TIME.
3459 Set both access and modification times.
3460 Return t on success, else nil.
3461 Use the current time if TIME is nil. TIME is in the format of
3464 Lisp_Object filename
, time
;
3466 Lisp_Object absname
, encoded_absname
;
3467 Lisp_Object handler
;
3471 if (! lisp_time_argument (time
, &sec
, &usec
))
3472 error ("Invalid time specification");
3474 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3476 /* If the file name has special constructs in it,
3477 call the corresponding file handler. */
3478 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3479 if (!NILP (handler
))
3480 return call3 (handler
, Qset_file_times
, absname
, time
);
3482 encoded_absname
= ENCODE_FILE (absname
);
3487 EMACS_SET_SECS (t
, sec
);
3488 EMACS_SET_USECS (t
, usec
);
3490 if (set_file_times (SDATA (encoded_absname
), t
, t
))
3495 /* Setting times on a directory always fails. */
3496 if (stat (SDATA (encoded_absname
), &st
) == 0
3497 && (st
.st_mode
& S_IFMT
) == S_IFDIR
)
3500 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3513 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3514 doc
: /* Tell Unix to finish all pending disk updates. */)
3523 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3524 doc
: /* Return t if file FILE1 is newer than file FILE2.
3525 If FILE1 does not exist, the answer is nil;
3526 otherwise, if FILE2 does not exist, the answer is t. */)
3528 Lisp_Object file1
, file2
;
3530 Lisp_Object absname1
, absname2
;
3533 Lisp_Object handler
;
3534 struct gcpro gcpro1
, gcpro2
;
3536 CHECK_STRING (file1
);
3537 CHECK_STRING (file2
);
3540 GCPRO2 (absname1
, file2
);
3541 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3542 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3545 /* If the file name has special constructs in it,
3546 call the corresponding file handler. */
3547 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3549 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3550 if (!NILP (handler
))
3551 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3553 GCPRO2 (absname1
, absname2
);
3554 absname1
= ENCODE_FILE (absname1
);
3555 absname2
= ENCODE_FILE (absname2
);
3558 if (stat (SDATA (absname1
), &st
) < 0)
3561 mtime1
= st
.st_mtime
;
3563 if (stat (SDATA (absname2
), &st
) < 0)
3566 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3570 Lisp_Object Qfind_buffer_file_type
;
3573 #ifndef READ_BUF_SIZE
3574 #define READ_BUF_SIZE (64 << 10)
3577 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3579 /* This function is called after Lisp functions to decide a coding
3580 system are called, or when they cause an error. Before they are
3581 called, the current buffer is set unibyte and it contains only a
3582 newly inserted text (thus the buffer was empty before the
3585 The functions may set markers, overlays, text properties, or even
3586 alter the buffer contents, change the current buffer.
3588 Here, we reset all those changes by:
3589 o set back the current buffer.
3590 o move all markers and overlays to BEG.
3591 o remove all text properties.
3592 o set back the buffer multibyteness. */
3595 decide_coding_unwind (unwind_data
)
3596 Lisp_Object unwind_data
;
3598 Lisp_Object multibyte
, undo_list
, buffer
;
3600 multibyte
= XCAR (unwind_data
);
3601 unwind_data
= XCDR (unwind_data
);
3602 undo_list
= XCAR (unwind_data
);
3603 buffer
= XCDR (unwind_data
);
3605 if (current_buffer
!= XBUFFER (buffer
))
3606 set_buffer_internal (XBUFFER (buffer
));
3607 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3608 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3609 BUF_INTERVALS (current_buffer
) = 0;
3610 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3612 /* Now we are safe to change the buffer's multibyteness directly. */
3613 current_buffer
->enable_multibyte_characters
= multibyte
;
3614 current_buffer
->undo_list
= undo_list
;
3620 /* Used to pass values from insert-file-contents to read_non_regular. */
3622 static int non_regular_fd
;
3623 static int non_regular_inserted
;
3624 static int non_regular_nbytes
;
3627 /* Read from a non-regular file.
3628 Read non_regular_trytry bytes max from non_regular_fd.
3629 Non_regular_inserted specifies where to put the read bytes.
3630 Value is the number of bytes read. */
3639 nbytes
= emacs_read (non_regular_fd
,
3640 BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ non_regular_inserted
,
3641 non_regular_nbytes
);
3643 return make_number (nbytes
);
3647 /* Condition-case handler used when reading from non-regular files
3648 in insert-file-contents. */
3651 read_non_regular_quit ()
3657 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3659 doc
: /* Insert contents of file FILENAME after point.
3660 Returns list of absolute file name and number of characters inserted.
3661 If second argument VISIT is non-nil, the buffer's visited filename
3662 and last save file modtime are set, and it is marked unmodified.
3663 If visiting and the file does not exist, visiting is completed
3664 before the error is signaled.
3665 The optional third and fourth arguments BEG and END
3666 specify what portion of the file to insert.
3667 These arguments count bytes in the file, not characters in the buffer.
3668 If VISIT is non-nil, BEG and END must be nil.
3670 If optional fifth argument REPLACE is non-nil,
3671 it means replace the current buffer contents (in the accessible portion)
3672 with the file contents. This is better than simply deleting and inserting
3673 the whole thing because (1) it preserves some marker positions
3674 and (2) it puts less data in the undo list.
3675 When REPLACE is non-nil, the value is the number of characters actually read,
3676 which is often less than the number of characters to be read.
3678 This does code conversion according to the value of
3679 `coding-system-for-read' or `file-coding-system-alist',
3680 and sets the variable `last-coding-system-used' to the coding system
3682 (filename
, visit
, beg
, end
, replace
)
3683 Lisp_Object filename
, visit
, beg
, end
, replace
;
3688 register int how_much
;
3689 register int unprocessed
;
3690 int count
= SPECPDL_INDEX ();
3691 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3692 Lisp_Object handler
, val
, insval
, orig_filename
;
3695 int not_regular
= 0;
3696 unsigned char read_buf
[READ_BUF_SIZE
];
3697 struct coding_system coding
;
3698 unsigned char buffer
[1 << 14];
3699 int replace_handled
= 0;
3700 int set_coding_system
= 0;
3701 Lisp_Object coding_system
;
3704 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3705 error ("Cannot do file visiting in an indirect buffer");
3707 if (!NILP (current_buffer
->read_only
))
3708 Fbarf_if_buffer_read_only ();
3712 orig_filename
= Qnil
;
3714 GCPRO4 (filename
, val
, p
, orig_filename
);
3716 CHECK_STRING (filename
);
3717 filename
= Fexpand_file_name (filename
, Qnil
);
3719 /* The value Qnil means that the coding system is not yet
3721 coding_system
= Qnil
;
3723 /* If the file name has special constructs in it,
3724 call the corresponding file handler. */
3725 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3726 if (!NILP (handler
))
3728 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3729 visit
, beg
, end
, replace
);
3730 if (CONSP (val
) && CONSP (XCDR (val
)))
3731 inserted
= XINT (XCAR (XCDR (val
)));
3735 orig_filename
= filename
;
3736 filename
= ENCODE_FILE (filename
);
3742 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3744 /* Tell stat to use expensive method to get accurate info. */
3745 Vw32_get_true_file_attributes
= Qt
;
3746 total
= stat (SDATA (filename
), &st
);
3747 Vw32_get_true_file_attributes
= tem
;
3752 if (stat (SDATA (filename
), &st
) < 0)
3754 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0
3755 || fstat (fd
, &st
) < 0)
3756 #endif /* not APOLLO */
3757 #endif /* WINDOWSNT */
3759 if (fd
>= 0) emacs_close (fd
);
3762 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3765 if (!NILP (Vcoding_system_for_read
))
3766 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3771 /* This code will need to be changed in order to work on named
3772 pipes, and it's probably just not worth it. So we should at
3773 least signal an error. */
3774 if (!S_ISREG (st
.st_mode
))
3781 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3782 Fsignal (Qfile_error
,
3783 Fcons (build_string ("not a regular file"),
3784 Fcons (orig_filename
, Qnil
)));
3789 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0)
3792 /* Replacement should preserve point as it preserves markers. */
3793 if (!NILP (replace
))
3794 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3796 record_unwind_protect (close_file_unwind
, make_number (fd
));
3798 /* Supposedly happens on VMS. */
3799 /* Can happen on any platform that uses long as type of off_t, but allows
3800 file sizes to exceed 2Gb. VMS is no longer officially supported, so
3801 give a message suitable for the latter case. */
3802 if (! not_regular
&& st
.st_size
< 0)
3803 error ("Maximum buffer size exceeded");
3805 /* Prevent redisplay optimizations. */
3806 current_buffer
->clip_changed
= 1;
3810 if (!NILP (beg
) || !NILP (end
))
3811 error ("Attempt to visit less than an entire file");
3812 if (BEG
< Z
&& NILP (replace
))
3813 error ("Cannot do file visiting in a non-empty buffer");
3819 XSETFASTINT (beg
, 0);
3827 XSETINT (end
, st
.st_size
);
3829 /* Arithmetic overflow can occur if an Emacs integer cannot
3830 represent the file size, or if the calculations below
3831 overflow. The calculations below double the file size
3832 twice, so check that it can be multiplied by 4 safely. */
3833 if (XINT (end
) != st
.st_size
3834 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3835 error ("Maximum buffer size exceeded");
3837 /* The file size returned from stat may be zero, but data
3838 may be readable nonetheless, for example when this is a
3839 file in the /proc filesystem. */
3840 if (st
.st_size
== 0)
3841 XSETINT (end
, READ_BUF_SIZE
);
3845 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3847 coding_system
= Qutf_8_emacs
;
3848 setup_coding_system (coding_system
, &coding
);
3849 /* Ensure we set Vlast_coding_system_used. */
3850 set_coding_system
= 1;
3854 /* Decide the coding system to use for reading the file now
3855 because we can't use an optimized method for handling
3856 `coding:' tag if the current buffer is not empty. */
3857 if (!NILP (Vcoding_system_for_read
))
3858 coding_system
= Vcoding_system_for_read
;
3861 /* Don't try looking inside a file for a coding system
3862 specification if it is not seekable. */
3863 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3865 /* Find a coding system specified in the heading two
3866 lines or in the tailing several lines of the file.
3867 We assume that the 1K-byte and 3K-byte for heading
3868 and tailing respectively are sufficient for this
3872 if (st
.st_size
<= (1024 * 4))
3873 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3876 nread
= emacs_read (fd
, read_buf
, 1024);
3879 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3880 report_file_error ("Setting file position",
3881 Fcons (orig_filename
, Qnil
));
3882 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3887 error ("IO error reading %s: %s",
3888 SDATA (orig_filename
), emacs_strerror (errno
));
3891 struct buffer
*prev
= current_buffer
;
3895 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3897 buffer
= Fget_buffer_create (build_string (" *code-converting-work*"));
3898 buf
= XBUFFER (buffer
);
3900 delete_all_overlays (buf
);
3901 buf
->directory
= current_buffer
->directory
;
3902 buf
->read_only
= Qnil
;
3903 buf
->filename
= Qnil
;
3904 buf
->undo_list
= Qt
;
3905 eassert (buf
->overlays_before
== NULL
);
3906 eassert (buf
->overlays_after
== NULL
);
3908 set_buffer_internal (buf
);
3910 buf
->enable_multibyte_characters
= Qnil
;
3912 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3913 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3914 coding_system
= call2 (Vset_auto_coding_function
,
3915 filename
, make_number (nread
));
3916 set_buffer_internal (prev
);
3918 /* Discard the unwind protect for recovering the
3922 /* Rewind the file for the actual read done later. */
3923 if (lseek (fd
, 0, 0) < 0)
3924 report_file_error ("Setting file position",
3925 Fcons (orig_filename
, Qnil
));
3929 if (NILP (coding_system
))
3931 /* If we have not yet decided a coding system, check
3932 file-coding-system-alist. */
3933 Lisp_Object args
[6];
3935 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3936 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3937 coding_system
= Ffind_operation_coding_system (6, args
);
3938 if (CONSP (coding_system
))
3939 coding_system
= XCAR (coding_system
);
3943 if (NILP (coding_system
))
3944 coding_system
= Qundecided
;
3946 CHECK_CODING_SYSTEM (coding_system
);
3948 if (NILP (current_buffer
->enable_multibyte_characters
))
3949 /* We must suppress all character code conversion except for
3950 end-of-line conversion. */
3951 coding_system
= raw_text_coding_system (coding_system
);
3953 setup_coding_system (coding_system
, &coding
);
3954 /* Ensure we set Vlast_coding_system_used. */
3955 set_coding_system
= 1;
3958 /* If requested, replace the accessible part of the buffer
3959 with the file contents. Avoid replacing text at the
3960 beginning or end of the buffer that matches the file contents;
3961 that preserves markers pointing to the unchanged parts.
3963 Here we implement this feature in an optimized way
3964 for the case where code conversion is NOT needed.
3965 The following if-statement handles the case of conversion
3966 in a less optimal way.
3968 If the code conversion is "automatic" then we try using this
3969 method and hope for the best.
3970 But if we discover the need for conversion, we give up on this method
3971 and let the following if-statement handle the replace job. */
3974 && (NILP (coding_system
)
3975 || ! CODING_REQUIRE_DECODING (&coding
)))
3977 /* same_at_start and same_at_end count bytes,
3978 because file access counts bytes
3979 and BEG and END count bytes. */
3980 int same_at_start
= BEGV_BYTE
;
3981 int same_at_end
= ZV_BYTE
;
3983 /* There is still a possibility we will find the need to do code
3984 conversion. If that happens, we set this variable to 1 to
3985 give up on handling REPLACE in the optimized way. */
3986 int giveup_match_end
= 0;
3988 if (XINT (beg
) != 0)
3990 if (lseek (fd
, XINT (beg
), 0) < 0)
3991 report_file_error ("Setting file position",
3992 Fcons (orig_filename
, Qnil
));
3997 /* Count how many chars at the start of the file
3998 match the text at the beginning of the buffer. */
4003 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
4005 error ("IO error reading %s: %s",
4006 SDATA (orig_filename
), emacs_strerror (errno
));
4007 else if (nread
== 0)
4010 if (CODING_REQUIRE_DETECTION (&coding
))
4012 coding_system
= detect_coding_system (buffer
, nread
, nread
, 1, 0,
4014 setup_coding_system (coding_system
, &coding
);
4017 if (CODING_REQUIRE_DECODING (&coding
))
4018 /* We found that the file should be decoded somehow.
4019 Let's give up here. */
4021 giveup_match_end
= 1;
4026 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
4027 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
4028 same_at_start
++, bufpos
++;
4029 /* If we found a discrepancy, stop the scan.
4030 Otherwise loop around and scan the next bufferful. */
4031 if (bufpos
!= nread
)
4035 /* If the file matches the buffer completely,
4036 there's no need to replace anything. */
4037 if (same_at_start
- BEGV_BYTE
== XINT (end
))
4041 /* Truncate the buffer to the size of the file. */
4042 del_range_1 (same_at_start
, same_at_end
, 0, 0);
4047 /* Count how many chars at the end of the file
4048 match the text at the end of the buffer. But, if we have
4049 already found that decoding is necessary, don't waste time. */
4050 while (!giveup_match_end
)
4052 int total_read
, nread
, bufpos
, curpos
, trial
;
4054 /* At what file position are we now scanning? */
4055 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
4056 /* If the entire file matches the buffer tail, stop the scan. */
4059 /* How much can we scan in the next step? */
4060 trial
= min (curpos
, sizeof buffer
);
4061 if (lseek (fd
, curpos
- trial
, 0) < 0)
4062 report_file_error ("Setting file position",
4063 Fcons (orig_filename
, Qnil
));
4065 total_read
= nread
= 0;
4066 while (total_read
< trial
)
4068 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
4070 error ("IO error reading %s: %s",
4071 SDATA (orig_filename
), emacs_strerror (errno
));
4072 else if (nread
== 0)
4074 total_read
+= nread
;
4077 /* Scan this bufferful from the end, comparing with
4078 the Emacs buffer. */
4079 bufpos
= total_read
;
4081 /* Compare with same_at_start to avoid counting some buffer text
4082 as matching both at the file's beginning and at the end. */
4083 while (bufpos
> 0 && same_at_end
> same_at_start
4084 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
4085 same_at_end
--, bufpos
--;
4087 /* If we found a discrepancy, stop the scan.
4088 Otherwise loop around and scan the preceding bufferful. */
4091 /* If this discrepancy is because of code conversion,
4092 we cannot use this method; giveup and try the other. */
4093 if (same_at_end
> same_at_start
4094 && FETCH_BYTE (same_at_end
- 1) >= 0200
4095 && ! NILP (current_buffer
->enable_multibyte_characters
)
4096 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
4097 giveup_match_end
= 1;
4106 if (! giveup_match_end
)
4110 /* We win! We can handle REPLACE the optimized way. */
4112 /* Extend the start of non-matching text area to multibyte
4113 character boundary. */
4114 if (! NILP (current_buffer
->enable_multibyte_characters
))
4115 while (same_at_start
> BEGV_BYTE
4116 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4119 /* Extend the end of non-matching text area to multibyte
4120 character boundary. */
4121 if (! NILP (current_buffer
->enable_multibyte_characters
))
4122 while (same_at_end
< ZV_BYTE
4123 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4126 /* Don't try to reuse the same piece of text twice. */
4127 overlap
= (same_at_start
- BEGV_BYTE
4128 - (same_at_end
+ st
.st_size
- ZV
));
4130 same_at_end
+= overlap
;
4132 /* Arrange to read only the nonmatching middle part of the file. */
4133 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
4134 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
4136 del_range_byte (same_at_start
, same_at_end
, 0);
4137 /* Insert from the file at the proper position. */
4138 temp
= BYTE_TO_CHAR (same_at_start
);
4139 SET_PT_BOTH (temp
, same_at_start
);
4141 /* If display currently starts at beginning of line,
4142 keep it that way. */
4143 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4144 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4146 replace_handled
= 1;
4150 /* If requested, replace the accessible part of the buffer
4151 with the file contents. Avoid replacing text at the
4152 beginning or end of the buffer that matches the file contents;
4153 that preserves markers pointing to the unchanged parts.
4155 Here we implement this feature for the case where code conversion
4156 is needed, in a simple way that needs a lot of memory.
4157 The preceding if-statement handles the case of no conversion
4158 in a more optimized way. */
4159 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
4161 int same_at_start
= BEGV_BYTE
;
4162 int same_at_end
= ZV_BYTE
;
4163 int same_at_start_charpos
;
4167 unsigned char *decoded
;
4169 int this_count
= SPECPDL_INDEX ();
4170 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
4171 Lisp_Object conversion_buffer
;
4173 conversion_buffer
= code_conversion_save (1, multibyte
);
4175 /* First read the whole file, performing code conversion into
4176 CONVERSION_BUFFER. */
4178 if (lseek (fd
, XINT (beg
), 0) < 0)
4179 report_file_error ("Setting file position",
4180 Fcons (orig_filename
, Qnil
));
4182 total
= st
.st_size
; /* Total bytes in the file. */
4183 how_much
= 0; /* Bytes read from file so far. */
4184 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
4185 unprocessed
= 0; /* Bytes not processed in previous loop. */
4187 GCPRO1 (conversion_buffer
);
4188 while (how_much
< total
)
4190 /* We read one bunch by one (READ_BUF_SIZE bytes) to allow
4191 quitting while reading a huge while. */
4192 /* try is reserved in some compilers (Microsoft C) */
4193 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
4196 /* Allow quitting out of the actual I/O. */
4199 this = emacs_read (fd
, read_buf
+ unprocessed
, trytry
);
4211 BUF_SET_PT (XBUFFER (conversion_buffer
),
4212 BUF_Z (XBUFFER (conversion_buffer
)));
4213 decode_coding_c_string (&coding
, read_buf
, unprocessed
+ this,
4215 unprocessed
= coding
.carryover_bytes
;
4216 if (coding
.carryover_bytes
> 0)
4217 bcopy (coding
.carryover
, read_buf
, unprocessed
);
4222 /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0
4223 if we couldn't read the file. */
4228 error ("IO error reading %s: %s",
4229 SDATA (orig_filename
), emacs_strerror (errno
));
4230 else if (how_much
== -2)
4231 error ("maximum buffer size exceeded");
4234 if (unprocessed
> 0)
4236 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4237 decode_coding_c_string (&coding
, read_buf
, unprocessed
,
4239 coding
.mode
&= ~CODING_MODE_LAST_BLOCK
;
4242 decoded
= BUF_BEG_ADDR (XBUFFER (conversion_buffer
));
4243 inserted
= (BUF_Z_BYTE (XBUFFER (conversion_buffer
))
4244 - BUF_BEG_BYTE (XBUFFER (conversion_buffer
)));
4246 /* Compare the beginning of the converted string with the buffer
4250 while (bufpos
< inserted
&& same_at_start
< same_at_end
4251 && FETCH_BYTE (same_at_start
) == decoded
[bufpos
])
4252 same_at_start
++, bufpos
++;
4254 /* If the file matches the head of buffer completely,
4255 there's no need to replace anything. */
4257 if (bufpos
== inserted
)
4260 /* Truncate the buffer to the size of the file. */
4261 del_range_byte (same_at_start
, same_at_end
, 0);
4264 unbind_to (this_count
, Qnil
);
4268 /* Extend the start of non-matching text area to the previous
4269 multibyte character boundary. */
4270 if (! NILP (current_buffer
->enable_multibyte_characters
))
4271 while (same_at_start
> BEGV_BYTE
4272 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4275 /* Scan this bufferful from the end, comparing with
4276 the Emacs buffer. */
4279 /* Compare with same_at_start to avoid counting some buffer text
4280 as matching both at the file's beginning and at the end. */
4281 while (bufpos
> 0 && same_at_end
> same_at_start
4282 && FETCH_BYTE (same_at_end
- 1) == decoded
[bufpos
- 1])
4283 same_at_end
--, bufpos
--;
4285 /* Extend the end of non-matching text area to the next
4286 multibyte character boundary. */
4287 if (! NILP (current_buffer
->enable_multibyte_characters
))
4288 while (same_at_end
< ZV_BYTE
4289 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4292 /* Don't try to reuse the same piece of text twice. */
4293 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4295 same_at_end
+= overlap
;
4297 /* If display currently starts at beginning of line,
4298 keep it that way. */
4299 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4300 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4302 /* Replace the chars that we need to replace,
4303 and update INSERTED to equal the number of bytes
4304 we are taking from the decoded string. */
4305 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
4307 if (same_at_end
!= same_at_start
)
4309 del_range_byte (same_at_start
, same_at_end
, 0);
4311 same_at_start
= GPT_BYTE
;
4315 temp
= BYTE_TO_CHAR (same_at_start
);
4317 /* Insert from the file at the proper position. */
4318 SET_PT_BOTH (temp
, same_at_start
);
4319 same_at_start_charpos
4320 = buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
4323 = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
4324 same_at_start
+ inserted
)
4325 - same_at_start_charpos
);
4326 insert_from_buffer (XBUFFER (conversion_buffer
),
4327 same_at_start_charpos
, inserted_chars
, 0);
4328 /* Set `inserted' to the number of inserted characters. */
4329 inserted
= PT
- temp
;
4331 unbind_to (this_count
, Qnil
);
4338 register Lisp_Object temp
;
4340 total
= XINT (end
) - XINT (beg
);
4342 /* Make sure point-max won't overflow after this insertion. */
4343 XSETINT (temp
, total
);
4344 if (total
!= XINT (temp
))
4345 error ("Maximum buffer size exceeded");
4348 /* For a special file, all we can do is guess. */
4349 total
= READ_BUF_SIZE
;
4351 if (NILP (visit
) && total
> 0)
4352 prepare_to_modify_buffer (PT
, PT
, NULL
);
4355 if (GAP_SIZE
< total
)
4356 make_gap (total
- GAP_SIZE
);
4358 if (XINT (beg
) != 0 || !NILP (replace
))
4360 if (lseek (fd
, XINT (beg
), 0) < 0)
4361 report_file_error ("Setting file position",
4362 Fcons (orig_filename
, Qnil
));
4365 /* In the following loop, HOW_MUCH contains the total bytes read so
4366 far for a regular file, and not changed for a special file. But,
4367 before exiting the loop, it is set to a negative value if I/O
4371 /* Total bytes inserted. */
4374 /* Here, we don't do code conversion in the loop. It is done by
4375 decode_coding_gap after all data are read into the buffer. */
4377 int gap_size
= GAP_SIZE
;
4379 while (how_much
< total
)
4381 /* try is reserved in some compilers (Microsoft C) */
4382 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4389 /* Maybe make more room. */
4390 if (gap_size
< trytry
)
4392 make_gap (total
- gap_size
);
4393 gap_size
= GAP_SIZE
;
4396 /* Read from the file, capturing `quit'. When an
4397 error occurs, end the loop, and arrange for a quit
4398 to be signaled after decoding the text we read. */
4399 non_regular_fd
= fd
;
4400 non_regular_inserted
= inserted
;
4401 non_regular_nbytes
= trytry
;
4402 val
= internal_condition_case_1 (read_non_regular
, Qnil
, Qerror
,
4403 read_non_regular_quit
);
4414 /* Allow quitting out of the actual I/O. We don't make text
4415 part of the buffer until all the reading is done, so a C-g
4416 here doesn't do any harm. */
4419 this = emacs_read (fd
, BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ inserted
, trytry
);
4431 /* For a regular file, where TOTAL is the real size,
4432 count HOW_MUCH to compare with it.
4433 For a special file, where TOTAL is just a buffer size,
4434 so don't bother counting in HOW_MUCH.
4435 (INSERTED is where we count the number of characters inserted.) */
4442 /* Make the text read part of the buffer. */
4443 GAP_SIZE
-= inserted
;
4445 GPT_BYTE
+= inserted
;
4447 ZV_BYTE
+= inserted
;
4452 /* Put an anchor to ensure multi-byte form ends at gap. */
4457 /* Discard the unwind protect for closing the file. */
4461 error ("IO error reading %s: %s",
4462 SDATA (orig_filename
), emacs_strerror (errno
));
4466 if (NILP (coding_system
))
4468 /* The coding system is not yet decided. Decide it by an
4469 optimized method for handling `coding:' tag.
4471 Note that we can get here only if the buffer was empty
4472 before the insertion. */
4474 if (!NILP (Vcoding_system_for_read
))
4475 coding_system
= Vcoding_system_for_read
;
4478 /* Since we are sure that the current buffer was empty
4479 before the insertion, we can toggle
4480 enable-multibyte-characters directly here without taking
4481 care of marker adjustment. By this way, we can run Lisp
4482 program safely before decoding the inserted text. */
4483 Lisp_Object unwind_data
;
4484 int count
= SPECPDL_INDEX ();
4486 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4487 Fcons (current_buffer
->undo_list
,
4488 Fcurrent_buffer ()));
4489 current_buffer
->enable_multibyte_characters
= Qnil
;
4490 current_buffer
->undo_list
= Qt
;
4491 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4493 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4495 coding_system
= call2 (Vset_auto_coding_function
,
4496 filename
, make_number (inserted
));
4499 if (NILP (coding_system
))
4501 /* If the coding system is not yet decided, check
4502 file-coding-system-alist. */
4503 Lisp_Object args
[6];
4505 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4506 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4507 coding_system
= Ffind_operation_coding_system (6, args
);
4508 if (CONSP (coding_system
))
4509 coding_system
= XCAR (coding_system
);
4512 unbind_to (count
, Qnil
);
4513 inserted
= Z_BYTE
- BEG_BYTE
;
4516 if (NILP (coding_system
))
4517 coding_system
= Qundecided
;
4519 CHECK_CODING_SYSTEM (coding_system
);
4521 if (NILP (current_buffer
->enable_multibyte_characters
))
4522 /* We must suppress all character code conversion except for
4523 end-of-line conversion. */
4524 coding_system
= raw_text_coding_system (coding_system
);
4525 setup_coding_system (coding_system
, &coding
);
4526 /* Ensure we set Vlast_coding_system_used. */
4527 set_coding_system
= 1;
4532 /* When we visit a file by raw-text, we change the buffer to
4534 if (CODING_FOR_UNIBYTE (&coding
)
4535 /* Can't do this if part of the buffer might be preserved. */
4537 /* Visiting a file with these coding system makes the buffer
4539 current_buffer
->enable_multibyte_characters
= Qnil
;
4542 coding
.dst_multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
4543 if (CODING_MAY_REQUIRE_DECODING (&coding
)
4544 && (inserted
> 0 || CODING_REQUIRE_FLUSHING (&coding
)))
4546 move_gap_both (PT
, PT_BYTE
);
4547 GAP_SIZE
+= inserted
;
4548 ZV_BYTE
-= inserted
;
4552 decode_coding_gap (&coding
, inserted
, inserted
);
4553 inserted
= coding
.produced_char
;
4554 coding_system
= CODING_ID_NAME (coding
.id
);
4556 else if (inserted
> 0)
4557 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4560 /* Now INSERTED is measured in characters. */
4563 /* Use the conversion type to determine buffer-file-type
4564 (find-buffer-file-type is now used to help determine the
4566 if ((VECTORP (CODING_ID_EOL_TYPE (coding
.id
))
4567 || EQ (CODING_ID_EOL_TYPE (coding
.id
), Qunix
))
4568 && ! CODING_REQUIRE_DECODING (&coding
))
4569 current_buffer
->buffer_file_type
= Qt
;
4571 current_buffer
->buffer_file_type
= Qnil
;
4578 if (!EQ (current_buffer
->undo_list
, Qt
))
4579 current_buffer
->undo_list
= Qnil
;
4581 stat (SDATA (filename
), &st
);
4586 current_buffer
->modtime
= st
.st_mtime
;
4587 current_buffer
->filename
= orig_filename
;
4590 SAVE_MODIFF
= MODIFF
;
4591 current_buffer
->auto_save_modified
= MODIFF
;
4592 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4593 #ifdef CLASH_DETECTION
4596 if (!NILP (current_buffer
->file_truename
))
4597 unlock_file (current_buffer
->file_truename
);
4598 unlock_file (filename
);
4600 #endif /* CLASH_DETECTION */
4602 Fsignal (Qfile_error
,
4603 Fcons (build_string ("not a regular file"),
4604 Fcons (orig_filename
, Qnil
)));
4607 if (set_coding_system
)
4608 Vlast_coding_system_used
= coding_system
;
4610 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4612 insval
= call2 (Qafter_insert_file_set_coding
, make_number (inserted
),
4614 if (! NILP (insval
))
4616 CHECK_NUMBER (insval
);
4617 inserted
= XFASTINT (insval
);
4621 /* Decode file format */
4624 int empty_undo_list_p
= 0;
4626 /* If we're anyway going to discard undo information, don't
4627 record it in the first place. The buffer's undo list at this
4628 point is either nil or t when visiting a file. */
4631 empty_undo_list_p
= NILP (current_buffer
->undo_list
);
4632 current_buffer
->undo_list
= Qt
;
4635 insval
= call3 (Qformat_decode
,
4636 Qnil
, make_number (inserted
), visit
);
4637 CHECK_NUMBER (insval
);
4638 inserted
= XFASTINT (insval
);
4641 current_buffer
->undo_list
= empty_undo_list_p
? Qnil
: Qt
;
4644 /* Call after-change hooks for the inserted text, aside from the case
4645 of normal visiting (not with REPLACE), which is done in a new buffer
4646 "before" the buffer is changed. */
4647 if (inserted
> 0 && total
> 0
4648 && (NILP (visit
) || !NILP (replace
)))
4650 signal_after_change (PT
, 0, inserted
);
4651 update_compositions (PT
, PT
, CHECK_BORDER
);
4654 p
= Vafter_insert_file_functions
;
4657 insval
= call1 (XCAR (p
), make_number (inserted
));
4660 CHECK_NUMBER (insval
);
4661 inserted
= XFASTINT (insval
);
4668 && current_buffer
->modtime
== -1)
4670 /* If visiting nonexistent file, return nil. */
4671 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4675 Fsignal (Qquit
, Qnil
);
4677 /* ??? Retval needs to be dealt with in all cases consistently. */
4679 val
= Fcons (orig_filename
,
4680 Fcons (make_number (inserted
),
4683 RETURN_UNGCPRO (unbind_to (count
, val
));
4686 static Lisp_Object build_annotations
P_ ((Lisp_Object
, Lisp_Object
));
4688 /* If build_annotations switched buffers, switch back to BUF.
4689 Kill the temporary buffer that was selected in the meantime.
4691 Since this kill only the last temporary buffer, some buffers remain
4692 not killed if build_annotations switched buffers more than once.
4696 build_annotations_unwind (buf
)
4701 if (XBUFFER (buf
) == current_buffer
)
4703 tembuf
= Fcurrent_buffer ();
4705 Fkill_buffer (tembuf
);
4709 /* Decide the coding-system to encode the data with. */
4712 choose_write_coding_system (start
, end
, filename
,
4713 append
, visit
, lockname
, coding
)
4714 Lisp_Object start
, end
, filename
, append
, visit
, lockname
;
4715 struct coding_system
*coding
;
4720 && NILP (Fstring_equal (current_buffer
->filename
,
4721 current_buffer
->auto_save_file_name
)))
4723 else if (!NILP (Vcoding_system_for_write
))
4725 val
= Vcoding_system_for_write
;
4726 if (coding_system_require_warning
4727 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4728 /* Confirm that VAL can surely encode the current region. */
4729 val
= call5 (Vselect_safe_coding_system_function
,
4730 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4735 /* If the variable `buffer-file-coding-system' is set locally,
4736 it means that the file was read with some kind of code
4737 conversion or the variable is explicitly set by users. We
4738 had better write it out with the same coding system even if
4739 `enable-multibyte-characters' is nil.
4741 If it is not set locally, we anyway have to convert EOL
4742 format if the default value of `buffer-file-coding-system'
4743 tells that it is not Unix-like (LF only) format. */
4744 int using_default_coding
= 0;
4745 int force_raw_text
= 0;
4747 val
= current_buffer
->buffer_file_coding_system
;
4749 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4752 if (NILP (current_buffer
->enable_multibyte_characters
))
4758 /* Check file-coding-system-alist. */
4759 Lisp_Object args
[7], coding_systems
;
4761 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4762 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4764 coding_systems
= Ffind_operation_coding_system (7, args
);
4765 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4766 val
= XCDR (coding_systems
);
4771 /* If we still have not decided a coding system, use the
4772 default value of buffer-file-coding-system. */
4773 val
= current_buffer
->buffer_file_coding_system
;
4774 using_default_coding
= 1;
4777 if (! NILP (val
) && ! force_raw_text
)
4779 Lisp_Object spec
, attrs
;
4781 CHECK_CODING_SYSTEM_GET_SPEC (val
, spec
);
4782 attrs
= AREF (spec
, 0);
4783 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
4788 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4789 /* Confirm that VAL can surely encode the current region. */
4790 val
= call5 (Vselect_safe_coding_system_function
,
4791 start
, end
, val
, Qnil
, filename
);
4793 /* If the decided coding-system doesn't specify end-of-line
4794 format, we use that of
4795 `default-buffer-file-coding-system'. */
4796 if (! using_default_coding
4797 && ! NILP (buffer_defaults
.buffer_file_coding_system
))
4798 val
= (coding_inherit_eol_type
4799 (val
, buffer_defaults
.buffer_file_coding_system
));
4801 /* If we decide not to encode text, use `raw-text' or one of its
4804 val
= raw_text_coding_system (val
);
4807 setup_coding_system (val
, coding
);
4809 && VECTORP (CODING_ID_EOL_TYPE (coding
->id
)))
4810 val
= AREF (CODING_ID_EOL_TYPE (coding
->id
), 0);
4812 if (!STRINGP (start
) && !NILP (current_buffer
->selective_display
))
4813 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4817 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4818 "r\nFWrite region to file: \ni\ni\ni\np",
4819 doc
: /* Write current region into specified file.
4820 When called from a program, requires three arguments:
4821 START, END and FILENAME. START and END are normally buffer positions
4822 specifying the part of the buffer to write.
4823 If START is nil, that means to use the entire buffer contents.
4824 If START is a string, then output that string to the file
4825 instead of any buffer contents; END is ignored.
4827 Optional fourth argument APPEND if non-nil means
4828 append to existing file contents (if any). If it is an integer,
4829 seek to that offset in the file before writing.
4830 Optional fifth argument VISIT, if t or a string, means
4831 set the last-save-file-modtime of buffer to this file's modtime
4832 and mark buffer not modified.
4833 If VISIT is a string, it is a second file name;
4834 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4835 VISIT is also the file name to lock and unlock for clash detection.
4836 If VISIT is neither t nor nil nor a string,
4837 that means do not display the \"Wrote file\" message.
4838 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4839 use for locking and unlocking, overriding FILENAME and VISIT.
4840 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4841 for an existing file with the same name. If MUSTBENEW is `excl',
4842 that means to get an error if the file already exists; never overwrite.
4843 If MUSTBENEW is neither nil nor `excl', that means ask for
4844 confirmation before overwriting, but do go ahead and overwrite the file
4845 if the user confirms.
4847 This does code conversion according to the value of
4848 `coding-system-for-write', `buffer-file-coding-system', or
4849 `file-coding-system-alist', and sets the variable
4850 `last-coding-system-used' to the coding system actually used. */)
4851 (start
, end
, filename
, append
, visit
, lockname
, mustbenew
)
4852 Lisp_Object start
, end
, filename
, append
, visit
, lockname
, mustbenew
;
4857 const unsigned char *fn
;
4859 int count
= SPECPDL_INDEX ();
4862 unsigned char *fname
= 0; /* If non-0, original filename (must rename) */
4864 Lisp_Object handler
;
4865 Lisp_Object visit_file
;
4866 Lisp_Object annotations
;
4867 Lisp_Object encoded_filename
;
4868 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4869 int quietly
= !NILP (visit
);
4870 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4871 struct buffer
*given_buffer
;
4873 int buffer_file_type
= O_BINARY
;
4875 struct coding_system coding
;
4877 if (current_buffer
->base_buffer
&& visiting
)
4878 error ("Cannot do file visiting in an indirect buffer");
4880 if (!NILP (start
) && !STRINGP (start
))
4881 validate_region (&start
, &end
);
4883 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
4885 filename
= Fexpand_file_name (filename
, Qnil
);
4887 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4888 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4890 if (STRINGP (visit
))
4891 visit_file
= Fexpand_file_name (visit
, Qnil
);
4893 visit_file
= filename
;
4895 if (NILP (lockname
))
4896 lockname
= visit_file
;
4900 /* If the file name has special constructs in it,
4901 call the corresponding file handler. */
4902 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4903 /* If FILENAME has no handler, see if VISIT has one. */
4904 if (NILP (handler
) && STRINGP (visit
))
4905 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4907 if (!NILP (handler
))
4910 val
= call6 (handler
, Qwrite_region
, start
, end
,
4911 filename
, append
, visit
);
4915 SAVE_MODIFF
= MODIFF
;
4916 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4917 current_buffer
->filename
= visit_file
;
4923 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
4925 /* Special kludge to simplify auto-saving. */
4928 XSETFASTINT (start
, BEG
);
4929 XSETFASTINT (end
, Z
);
4933 record_unwind_protect (build_annotations_unwind
, Fcurrent_buffer ());
4934 count1
= SPECPDL_INDEX ();
4936 given_buffer
= current_buffer
;
4938 if (!STRINGP (start
))
4940 annotations
= build_annotations (start
, end
);
4942 if (current_buffer
!= given_buffer
)
4944 XSETFASTINT (start
, BEGV
);
4945 XSETFASTINT (end
, ZV
);
4951 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4953 /* Decide the coding-system to encode the data with.
4954 We used to make this choice before calling build_annotations, but that
4955 leads to problems when a write-annotate-function takes care of
4956 unsavable chars (as was the case with X-Symbol). */
4957 Vlast_coding_system_used
4958 = choose_write_coding_system (start
, end
, filename
,
4959 append
, visit
, lockname
, &coding
);
4961 #ifdef CLASH_DETECTION
4964 #if 0 /* This causes trouble for GNUS. */
4965 /* If we've locked this file for some other buffer,
4966 query before proceeding. */
4967 if (!visiting
&& EQ (Ffile_locked_p (lockname
), Qt
))
4968 call2 (intern ("ask-user-about-lock"), filename
, Vuser_login_name
);
4971 lock_file (lockname
);
4973 #endif /* CLASH_DETECTION */
4975 encoded_filename
= ENCODE_FILE (filename
);
4977 fn
= SDATA (encoded_filename
);
4981 desc
= emacs_open (fn
, O_WRONLY
| buffer_file_type
, 0);
4982 #else /* not DOS_NT */
4983 desc
= emacs_open (fn
, O_WRONLY
, 0);
4984 #endif /* not DOS_NT */
4986 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
4988 if (auto_saving
) /* Overwrite any previous version of autosave file */
4990 vms_truncate (fn
); /* if fn exists, truncate to zero length */
4991 desc
= emacs_open (fn
, O_RDWR
, 0);
4993 desc
= creat_copy_attrs (STRINGP (current_buffer
->filename
)
4994 ? SDATA (current_buffer
->filename
) : 0,
4997 else /* Write to temporary name and rename if no errors */
4999 Lisp_Object temp_name
;
5000 temp_name
= Ffile_name_directory (filename
);
5002 if (!NILP (temp_name
))
5004 temp_name
= Fmake_temp_name (concat2 (temp_name
,
5005 build_string ("$$SAVE$$")));
5006 fname
= SDATA (filename
);
5007 fn
= SDATA (temp_name
);
5008 desc
= creat_copy_attrs (fname
, fn
);
5011 /* If we can't open the temporary file, try creating a new
5012 version of the original file. VMS "creat" creates a
5013 new version rather than truncating an existing file. */
5016 desc
= creat (fn
, 0666);
5017 #if 0 /* This can clobber an existing file and fail to replace it,
5018 if the user runs out of space. */
5021 /* We can't make a new version;
5022 try to truncate and rewrite existing version if any. */
5024 desc
= emacs_open (fn
, O_RDWR
, 0);
5030 desc
= creat (fn
, 0666);
5034 desc
= emacs_open (fn
,
5035 O_WRONLY
| O_CREAT
| buffer_file_type
5036 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
5037 S_IREAD
| S_IWRITE
);
5038 #else /* not DOS_NT */
5039 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
5040 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
5041 auto_saving
? auto_save_mode_bits
: 0666);
5042 #endif /* not DOS_NT */
5043 #endif /* not VMS */
5047 #ifdef CLASH_DETECTION
5049 if (!auto_saving
) unlock_file (lockname
);
5051 #endif /* CLASH_DETECTION */
5053 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
5056 record_unwind_protect (close_file_unwind
, make_number (desc
));
5058 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
5062 if (NUMBERP (append
))
5063 ret
= lseek (desc
, XINT (append
), 1);
5065 ret
= lseek (desc
, 0, 2);
5068 #ifdef CLASH_DETECTION
5069 if (!auto_saving
) unlock_file (lockname
);
5070 #endif /* CLASH_DETECTION */
5072 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
5080 * Kludge Warning: The VMS C RTL likes to insert carriage returns
5081 * if we do writes that don't end with a carriage return. Furthermore
5082 * it cannot handle writes of more then 16K. The modified
5083 * version of "sys_write" in SYSDEP.C (see comment there) copes with
5084 * this EXCEPT for the last record (iff it doesn't end with a carriage
5085 * return). This implies that if your buffer doesn't end with a carriage
5086 * return, you get one free... tough. However it also means that if
5087 * we make two calls to sys_write (a la the following code) you can
5088 * get one at the gap as well. The easiest way to fix this (honest)
5089 * is to move the gap to the next newline (or the end of the buffer).
5094 if (GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5095 move_gap (find_next_newline (GPT
, 1));
5098 /* The new encoding routine doesn't require the following. */
5100 /* Whether VMS or not, we must move the gap to the next of newline
5101 when we must put designation sequences at beginning of line. */
5102 if (INTEGERP (start
)
5103 && coding
.type
== coding_type_iso2022
5104 && coding
.flags
& CODING_FLAG_ISO_DESIGNATE_AT_BOL
5105 && GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5107 int opoint
= PT
, opoint_byte
= PT_BYTE
;
5108 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 0);
5109 move_gap_both (PT
, PT_BYTE
);
5110 SET_PT_BOTH (opoint
, opoint_byte
);
5118 if (STRINGP (start
))
5120 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
5121 &annotations
, &coding
);
5124 else if (XINT (start
) != XINT (end
))
5126 failure
= 0 > a_write (desc
, Qnil
,
5127 XINT (start
), XINT (end
) - XINT (start
),
5128 &annotations
, &coding
);
5133 /* If file was empty, still need to write the annotations */
5134 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5135 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
5139 if (CODING_REQUIRE_FLUSHING (&coding
)
5140 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
5143 /* We have to flush out a data. */
5144 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5145 failure
= 0 > e_write (desc
, Qnil
, 1, 1, &coding
);
5152 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
5153 Disk full in NFS may be reported here. */
5154 /* mib says that closing the file will try to write as fast as NFS can do
5155 it, and that means the fsync here is not crucial for autosave files. */
5156 if (!auto_saving
&& fsync (desc
) < 0)
5158 /* If fsync fails with EINTR, don't treat that as serious. */
5160 failure
= 1, save_errno
= errno
;
5164 /* Spurious "file has changed on disk" warnings have been
5165 observed on Suns as well.
5166 It seems that `close' can change the modtime, under nfs.
5168 (This has supposedly been fixed in Sunos 4,
5169 but who knows about all the other machines with NFS?) */
5172 /* On VMS and APOLLO, must do the stat after the close
5173 since closing changes the modtime. */
5176 /* Recall that #if defined does not work on VMS. */
5183 /* NFS can report a write failure now. */
5184 if (emacs_close (desc
) < 0)
5185 failure
= 1, save_errno
= errno
;
5188 /* If we wrote to a temporary name and had no errors, rename to real name. */
5192 failure
= (rename (fn
, fname
) != 0), save_errno
= errno
;
5200 /* Discard the unwind protect for close_file_unwind. */
5201 specpdl_ptr
= specpdl
+ count1
;
5202 /* Restore the original current buffer. */
5203 visit_file
= unbind_to (count
, visit_file
);
5205 #ifdef CLASH_DETECTION
5207 unlock_file (lockname
);
5208 #endif /* CLASH_DETECTION */
5210 /* Do this before reporting IO error
5211 to avoid a "file has changed on disk" warning on
5212 next attempt to save. */
5214 current_buffer
->modtime
= st
.st_mtime
;
5217 error ("IO error writing %s: %s", SDATA (filename
),
5218 emacs_strerror (save_errno
));
5222 SAVE_MODIFF
= MODIFF
;
5223 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5224 current_buffer
->filename
= visit_file
;
5225 update_mode_lines
++;
5230 && ! NILP (Fstring_equal (current_buffer
->filename
,
5231 current_buffer
->auto_save_file_name
)))
5232 SAVE_MODIFF
= MODIFF
;
5238 message_with_string ((INTEGERP (append
)
5248 Lisp_Object
merge ();
5250 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
5251 doc
: /* Return t if (car A) is numerically less than (car B). */)
5255 return Flss (Fcar (a
), Fcar (b
));
5258 /* Build the complete list of annotations appropriate for writing out
5259 the text between START and END, by calling all the functions in
5260 write-region-annotate-functions and merging the lists they return.
5261 If one of these functions switches to a different buffer, we assume
5262 that buffer contains altered text. Therefore, the caller must
5263 make sure to restore the current buffer in all cases,
5264 as save-excursion would do. */
5267 build_annotations (start
, end
)
5268 Lisp_Object start
, end
;
5270 Lisp_Object annotations
;
5272 struct gcpro gcpro1
, gcpro2
;
5273 Lisp_Object original_buffer
;
5274 int i
, used_global
= 0;
5276 XSETBUFFER (original_buffer
, current_buffer
);
5279 p
= Vwrite_region_annotate_functions
;
5280 GCPRO2 (annotations
, p
);
5283 struct buffer
*given_buffer
= current_buffer
;
5284 if (EQ (Qt
, XCAR (p
)) && !used_global
)
5285 { /* Use the global value of the hook. */
5288 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
5290 p
= Fappend (2, arg
);
5293 Vwrite_region_annotations_so_far
= annotations
;
5294 res
= call2 (XCAR (p
), start
, end
);
5295 /* If the function makes a different buffer current,
5296 assume that means this buffer contains altered text to be output.
5297 Reset START and END from the buffer bounds
5298 and discard all previous annotations because they should have
5299 been dealt with by this function. */
5300 if (current_buffer
!= given_buffer
)
5302 XSETFASTINT (start
, BEGV
);
5303 XSETFASTINT (end
, ZV
);
5306 Flength (res
); /* Check basic validity of return value */
5307 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5311 /* Now do the same for annotation functions implied by the file-format */
5312 if (auto_saving
&& (!EQ (current_buffer
->auto_save_file_format
, Qt
)))
5313 p
= current_buffer
->auto_save_file_format
;
5315 p
= current_buffer
->file_format
;
5316 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
5318 struct buffer
*given_buffer
= current_buffer
;
5320 Vwrite_region_annotations_so_far
= annotations
;
5322 /* Value is either a list of annotations or nil if the function
5323 has written annotations to a temporary buffer, which is now
5325 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
5326 original_buffer
, make_number (i
));
5327 if (current_buffer
!= given_buffer
)
5329 XSETFASTINT (start
, BEGV
);
5330 XSETFASTINT (end
, ZV
);
5335 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5343 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
5344 If STRING is nil, POS is the character position in the current buffer.
5345 Intersperse with them the annotations from *ANNOT
5346 which fall within the range of POS to POS + NCHARS,
5347 each at its appropriate position.
5349 We modify *ANNOT by discarding elements as we use them up.
5351 The return value is negative in case of system call failure. */
5354 a_write (desc
, string
, pos
, nchars
, annot
, coding
)
5357 register int nchars
;
5360 struct coding_system
*coding
;
5364 int lastpos
= pos
+ nchars
;
5366 while (NILP (*annot
) || CONSP (*annot
))
5368 tem
= Fcar_safe (Fcar (*annot
));
5371 nextpos
= XFASTINT (tem
);
5373 /* If there are no more annotations in this range,
5374 output the rest of the range all at once. */
5375 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
5376 return e_write (desc
, string
, pos
, lastpos
, coding
);
5378 /* Output buffer text up to the next annotation's position. */
5381 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
5385 /* Output the annotation. */
5386 tem
= Fcdr (Fcar (*annot
));
5389 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
5392 *annot
= Fcdr (*annot
);
5398 /* Write text in the range START and END into descriptor DESC,
5399 encoding them with coding system CODING. If STRING is nil, START
5400 and END are character positions of the current buffer, else they
5401 are indexes to the string STRING. */
5404 e_write (desc
, string
, start
, end
, coding
)
5408 struct coding_system
*coding
;
5410 if (STRINGP (string
))
5413 end
= SCHARS (string
);
5416 /* We used to have a code for handling selective display here. But,
5417 now it is handled within encode_coding. */
5421 if (STRINGP (string
))
5423 coding
->src_multibyte
= SCHARS (string
) < SBYTES (string
);
5424 if (CODING_REQUIRE_ENCODING (coding
))
5426 encode_coding_object (coding
, string
,
5427 start
, string_char_to_byte (string
, start
),
5428 end
, string_char_to_byte (string
, end
), Qt
);
5432 coding
->dst_object
= string
;
5433 coding
->consumed_char
= SCHARS (string
);
5434 coding
->produced
= SBYTES (string
);
5439 int start_byte
= CHAR_TO_BYTE (start
);
5440 int end_byte
= CHAR_TO_BYTE (end
);
5442 coding
->src_multibyte
= (end
- start
) < (end_byte
- start_byte
);
5443 if (CODING_REQUIRE_ENCODING (coding
))
5445 encode_coding_object (coding
, Fcurrent_buffer (),
5446 start
, start_byte
, end
, end_byte
, Qt
);
5450 coding
->dst_object
= Qnil
;
5451 coding
->dst_pos_byte
= start_byte
;
5452 if (start
>= GPT
|| end
<= GPT
)
5454 coding
->consumed_char
= end
- start
;
5455 coding
->produced
= end_byte
- start_byte
;
5459 coding
->consumed_char
= GPT
- start
;
5460 coding
->produced
= GPT_BYTE
- start_byte
;
5465 if (coding
->produced
> 0)
5469 STRINGP (coding
->dst_object
)
5470 ? SDATA (coding
->dst_object
)
5471 : BYTE_POS_ADDR (coding
->dst_pos_byte
),
5474 if (coding
->produced
)
5477 start
+= coding
->consumed_char
;
5483 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5484 Sverify_visited_file_modtime
, 1, 1, 0,
5485 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
5486 This means that the file has not been changed since it was visited or saved.
5487 See Info node `(elisp)Modification Time' for more details. */)
5493 Lisp_Object handler
;
5494 Lisp_Object filename
;
5499 if (!STRINGP (b
->filename
)) return Qt
;
5500 if (b
->modtime
== 0) return Qt
;
5502 /* If the file name has special constructs in it,
5503 call the corresponding file handler. */
5504 handler
= Ffind_file_name_handler (b
->filename
,
5505 Qverify_visited_file_modtime
);
5506 if (!NILP (handler
))
5507 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5509 filename
= ENCODE_FILE (b
->filename
);
5511 if (stat (SDATA (filename
), &st
) < 0)
5513 /* If the file doesn't exist now and didn't exist before,
5514 we say that it isn't modified, provided the error is a tame one. */
5515 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5520 if (st
.st_mtime
== b
->modtime
5521 /* If both are positive, accept them if they are off by one second. */
5522 || (st
.st_mtime
> 0 && b
->modtime
> 0
5523 && (st
.st_mtime
== b
->modtime
+ 1
5524 || st
.st_mtime
== b
->modtime
- 1)))
5529 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5530 Sclear_visited_file_modtime
, 0, 0, 0,
5531 doc
: /* Clear out records of last mod time of visited file.
5532 Next attempt to save will certainly not complain of a discrepancy. */)
5535 current_buffer
->modtime
= 0;
5539 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5540 Svisited_file_modtime
, 0, 0, 0,
5541 doc
: /* Return the current buffer's recorded visited file modification time.
5542 The value is a list of the form (HIGH LOW), like the time values
5543 that `file-attributes' returns. If the current buffer has no recorded
5544 file modification time, this function returns 0.
5545 See Info node `(elisp)Modification Time' for more details. */)
5549 tcons
= long_to_cons ((unsigned long) current_buffer
->modtime
);
5551 return list2 (XCAR (tcons
), XCDR (tcons
));
5555 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5556 Sset_visited_file_modtime
, 0, 1, 0,
5557 doc
: /* Update buffer's recorded modification time from the visited file's time.
5558 Useful if the buffer was not read from the file normally
5559 or if the file itself has been changed for some known benign reason.
5560 An argument specifies the modification time value to use
5561 \(instead of that of the visited file), in the form of a list
5562 \(HIGH . LOW) or (HIGH LOW). */)
5564 Lisp_Object time_list
;
5566 if (!NILP (time_list
))
5567 current_buffer
->modtime
= cons_to_long (time_list
);
5570 register Lisp_Object filename
;
5572 Lisp_Object handler
;
5574 filename
= Fexpand_file_name (current_buffer
->filename
, Qnil
);
5576 /* If the file name has special constructs in it,
5577 call the corresponding file handler. */
5578 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5579 if (!NILP (handler
))
5580 /* The handler can find the file name the same way we did. */
5581 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5583 filename
= ENCODE_FILE (filename
);
5585 if (stat (SDATA (filename
), &st
) >= 0)
5586 current_buffer
->modtime
= st
.st_mtime
;
5593 auto_save_error (error
)
5596 Lisp_Object args
[3], msg
;
5598 struct gcpro gcpro1
;
5602 args
[0] = build_string ("Auto-saving %s: %s");
5603 args
[1] = current_buffer
->name
;
5604 args
[2] = Ferror_message_string (error
);
5605 msg
= Fformat (3, args
);
5607 nbytes
= SBYTES (msg
);
5609 for (i
= 0; i
< 3; ++i
)
5612 message2 (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5614 message2_nolog (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5615 Fsleep_for (make_number (1), Qnil
);
5628 auto_save_mode_bits
= 0666;
5630 /* Get visited file's mode to become the auto save file's mode. */
5631 if (! NILP (current_buffer
->filename
))
5633 if (stat (SDATA (current_buffer
->filename
), &st
) >= 0)
5634 /* But make sure we can overwrite it later! */
5635 auto_save_mode_bits
= st
.st_mode
| 0600;
5636 else if ((modes
= Ffile_modes (current_buffer
->filename
),
5638 /* Remote files don't cooperate with stat. */
5639 auto_save_mode_bits
= XINT (modes
) | 0600;
5643 Fwrite_region (Qnil
, Qnil
,
5644 current_buffer
->auto_save_file_name
,
5645 Qnil
, Qlambda
, Qnil
, Qnil
);
5649 do_auto_save_unwind (stream
) /* used as unwind-protect function */
5654 fclose ((FILE *) (XFASTINT (XCAR (stream
)) << 16
5655 | XFASTINT (XCDR (stream
))));
5660 do_auto_save_unwind_1 (value
) /* used as unwind-protect function */
5663 minibuffer_auto_raise
= XINT (value
);
5668 do_auto_save_make_dir (dir
)
5671 return call2 (Qmake_directory
, dir
, Qt
);
5675 do_auto_save_eh (ignore
)
5681 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5682 doc
: /* Auto-save all buffers that need it.
5683 This is all buffers that have auto-saving enabled
5684 and are changed since last auto-saved.
5685 Auto-saving writes the buffer into a file
5686 so that your editing is not lost if the system crashes.
5687 This file is not the file you visited; that changes only when you save.
5688 Normally we run the normal hook `auto-save-hook' before saving.
5690 A non-nil NO-MESSAGE argument means do not print any message if successful.
5691 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5692 (no_message
, current_only
)
5693 Lisp_Object no_message
, current_only
;
5695 struct buffer
*old
= current_buffer
, *b
;
5696 Lisp_Object tail
, buf
;
5698 int do_handled_files
;
5701 Lisp_Object lispstream
;
5702 int count
= SPECPDL_INDEX ();
5703 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5704 int old_message_p
= 0;
5705 struct gcpro gcpro1
, gcpro2
;
5707 if (max_specpdl_size
< specpdl_size
+ 40)
5708 max_specpdl_size
= specpdl_size
+ 40;
5713 if (NILP (no_message
))
5715 old_message_p
= push_message ();
5716 record_unwind_protect (pop_message_unwind
, Qnil
);
5719 /* Ordinarily don't quit within this function,
5720 but don't make it impossible to quit (in case we get hung in I/O). */
5724 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5725 point to non-strings reached from Vbuffer_alist. */
5727 if (!NILP (Vrun_hooks
))
5728 call1 (Vrun_hooks
, intern ("auto-save-hook"));
5730 if (STRINGP (Vauto_save_list_file_name
))
5732 Lisp_Object listfile
;
5734 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5736 /* Don't try to create the directory when shutting down Emacs,
5737 because creating the directory might signal an error, and
5738 that would leave Emacs in a strange state. */
5739 if (!NILP (Vrun_hooks
))
5743 GCPRO2 (dir
, listfile
);
5744 dir
= Ffile_name_directory (listfile
);
5745 if (NILP (Ffile_directory_p (dir
)))
5746 internal_condition_case_1 (do_auto_save_make_dir
,
5747 dir
, Fcons (Fcons (Qfile_error
, Qnil
), Qnil
),
5752 stream
= fopen (SDATA (listfile
), "w");
5755 /* Arrange to close that file whether or not we get an error.
5756 Also reset auto_saving to 0. */
5757 lispstream
= Fcons (Qnil
, Qnil
);
5758 XSETCARFASTINT (lispstream
, (EMACS_UINT
)stream
>> 16);
5759 XSETCDRFASTINT (lispstream
, (EMACS_UINT
)stream
& 0xffff);
5770 record_unwind_protect (do_auto_save_unwind
, lispstream
);
5771 record_unwind_protect (do_auto_save_unwind_1
,
5772 make_number (minibuffer_auto_raise
));
5773 minibuffer_auto_raise
= 0;
5776 /* On first pass, save all files that don't have handlers.
5777 On second pass, save all files that do have handlers.
5779 If Emacs is crashing, the handlers may tweak what is causing
5780 Emacs to crash in the first place, and it would be a shame if
5781 Emacs failed to autosave perfectly ordinary files because it
5782 couldn't handle some ange-ftp'd file. */
5784 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5785 for (tail
= Vbuffer_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5787 buf
= XCDR (XCAR (tail
));
5790 /* Record all the buffers that have auto save mode
5791 in the special file that lists them. For each of these buffers,
5792 Record visited name (if any) and auto save name. */
5793 if (STRINGP (b
->auto_save_file_name
)
5794 && stream
!= NULL
&& do_handled_files
== 0)
5796 if (!NILP (b
->filename
))
5798 fwrite (SDATA (b
->filename
), 1,
5799 SBYTES (b
->filename
), stream
);
5801 putc ('\n', stream
);
5802 fwrite (SDATA (b
->auto_save_file_name
), 1,
5803 SBYTES (b
->auto_save_file_name
), stream
);
5804 putc ('\n', stream
);
5807 if (!NILP (current_only
)
5808 && b
!= current_buffer
)
5811 /* Don't auto-save indirect buffers.
5812 The base buffer takes care of it. */
5816 /* Check for auto save enabled
5817 and file changed since last auto save
5818 and file changed since last real save. */
5819 if (STRINGP (b
->auto_save_file_name
)
5820 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5821 && b
->auto_save_modified
< BUF_MODIFF (b
)
5822 /* -1 means we've turned off autosaving for a while--see below. */
5823 && XINT (b
->save_length
) >= 0
5824 && (do_handled_files
5825 || NILP (Ffind_file_name_handler (b
->auto_save_file_name
,
5828 EMACS_TIME before_time
, after_time
;
5830 EMACS_GET_TIME (before_time
);
5832 /* If we had a failure, don't try again for 20 minutes. */
5833 if (b
->auto_save_failure_time
>= 0
5834 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5837 if ((XFASTINT (b
->save_length
) * 10
5838 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5839 /* A short file is likely to change a large fraction;
5840 spare the user annoying messages. */
5841 && XFASTINT (b
->save_length
) > 5000
5842 /* These messages are frequent and annoying for `*mail*'. */
5843 && !EQ (b
->filename
, Qnil
)
5844 && NILP (no_message
))
5846 /* It has shrunk too much; turn off auto-saving here. */
5847 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5848 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
5850 minibuffer_auto_raise
= 0;
5851 /* Turn off auto-saving until there's a real save,
5852 and prevent any more warnings. */
5853 XSETINT (b
->save_length
, -1);
5854 Fsleep_for (make_number (1), Qnil
);
5857 set_buffer_internal (b
);
5858 if (!auto_saved
&& NILP (no_message
))
5859 message1 ("Auto-saving...");
5860 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5862 b
->auto_save_modified
= BUF_MODIFF (b
);
5863 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5864 set_buffer_internal (old
);
5866 EMACS_GET_TIME (after_time
);
5868 /* If auto-save took more than 60 seconds,
5869 assume it was an NFS failure that got a timeout. */
5870 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5871 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5875 /* Prevent another auto save till enough input events come in. */
5876 record_auto_save ();
5878 if (auto_saved
&& NILP (no_message
))
5882 /* If we are going to restore an old message,
5883 give time to read ours. */
5884 sit_for (1, 0, 0, 0, 0);
5888 /* If we displayed a message and then restored a state
5889 with no message, leave a "done" message on the screen. */
5890 message1 ("Auto-saving...done");
5895 /* This restores the message-stack status. */
5896 unbind_to (count
, Qnil
);
5900 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5901 Sset_buffer_auto_saved
, 0, 0, 0,
5902 doc
: /* Mark current buffer as auto-saved with its current text.
5903 No auto-save file will be written until the buffer changes again. */)
5906 current_buffer
->auto_save_modified
= MODIFF
;
5907 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5908 current_buffer
->auto_save_failure_time
= -1;
5912 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
5913 Sclear_buffer_auto_save_failure
, 0, 0, 0,
5914 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
5917 current_buffer
->auto_save_failure_time
= -1;
5921 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
5923 doc
: /* Return t if buffer has been auto-saved since last read in or saved. */)
5926 return (SAVE_MODIFF
< current_buffer
->auto_save_modified
) ? Qt
: Qnil
;
5929 /* Reading and completing file names */
5930 extern Lisp_Object
Ffile_name_completion (), Ffile_name_all_completions ();
5932 /* In the string VAL, change each $ to $$ and return the result. */
5935 double_dollars (val
)
5938 register const unsigned char *old
;
5939 register unsigned char *new;
5943 osize
= SBYTES (val
);
5945 /* Count the number of $ characters. */
5946 for (n
= osize
, count
= 0, old
= SDATA (val
); n
> 0; n
--)
5947 if (*old
++ == '$') count
++;
5951 val
= make_uninit_multibyte_string (SCHARS (val
) + count
,
5954 for (n
= osize
; n
> 0; n
--)
5968 read_file_name_cleanup (arg
)
5971 return (current_buffer
->directory
= arg
);
5974 DEFUN ("read-file-name-internal", Fread_file_name_internal
, Sread_file_name_internal
,
5976 doc
: /* Internal subroutine for read-file-name. Do not call this. */)
5977 (string
, dir
, action
)
5978 Lisp_Object string
, dir
, action
;
5979 /* action is nil for complete, t for return list of completions,
5980 lambda for verify final value */
5982 Lisp_Object name
, specdir
, realdir
, val
, orig_string
;
5984 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
5986 CHECK_STRING (string
);
5993 /* No need to protect ACTION--we only compare it with t and nil. */
5994 GCPRO5 (string
, realdir
, name
, specdir
, orig_string
);
5996 if (SCHARS (string
) == 0)
5998 if (EQ (action
, Qlambda
))
6006 orig_string
= string
;
6007 string
= Fsubstitute_in_file_name (string
);
6008 changed
= NILP (Fstring_equal (string
, orig_string
));
6009 name
= Ffile_name_nondirectory (string
);
6010 val
= Ffile_name_directory (string
);
6012 realdir
= Fexpand_file_name (val
, realdir
);
6017 specdir
= Ffile_name_directory (string
);
6018 val
= Ffile_name_completion (name
, realdir
);
6023 return double_dollars (string
);
6027 if (!NILP (specdir
))
6028 val
= concat2 (specdir
, val
);
6030 return double_dollars (val
);
6033 #endif /* not VMS */
6037 if (EQ (action
, Qt
))
6039 Lisp_Object all
= Ffile_name_all_completions (name
, realdir
);
6043 if (NILP (Vread_file_name_predicate
)
6044 || EQ (Vread_file_name_predicate
, Qfile_exists_p
))
6048 if (EQ (Vread_file_name_predicate
, Qfile_directory_p
))
6050 /* Brute-force speed up for directory checking:
6051 Discard strings which don't end in a slash. */
6052 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6054 Lisp_Object tem
= XCAR (all
);
6056 if (STRINGP (tem
) &&
6057 (len
= SCHARS (tem
), len
> 0) &&
6058 IS_DIRECTORY_SEP (SREF (tem
, len
-1)))
6059 comp
= Fcons (tem
, comp
);
6065 /* Must do it the hard (and slow) way. */
6066 GCPRO3 (all
, comp
, specdir
);
6067 count
= SPECPDL_INDEX ();
6068 record_unwind_protect (read_file_name_cleanup
, current_buffer
->directory
);
6069 current_buffer
->directory
= realdir
;
6070 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6071 if (!NILP (call1 (Vread_file_name_predicate
, XCAR (all
))))
6072 comp
= Fcons (XCAR (all
), comp
);
6073 unbind_to (count
, Qnil
);
6076 return Fnreverse (comp
);
6079 /* Only other case actually used is ACTION = lambda */
6081 /* Supposedly this helps commands such as `cd' that read directory names,
6082 but can someone explain how it helps them? -- RMS */
6083 if (SCHARS (name
) == 0)
6086 string
= Fexpand_file_name (string
, dir
);
6087 if (!NILP (Vread_file_name_predicate
))
6088 return call1 (Vread_file_name_predicate
, string
);
6089 return Ffile_exists_p (string
);
6092 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
6093 Snext_read_file_uses_dialog_p
, 0, 0, 0,
6094 doc
: /* Return t if a call to `read-file-name' will use a dialog.
6095 The return value is only relevant for a call to `read-file-name' that happens
6096 before any other event (mouse or keypress) is handeled. */)
6099 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6100 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
6109 DEFUN ("read-file-name", Fread_file_name
, Sread_file_name
, 1, 6, 0,
6110 doc
: /* Read file name, prompting with PROMPT and completing in directory DIR.
6111 Value is not expanded---you must call `expand-file-name' yourself.
6112 Default name to DEFAULT-FILENAME if user exits the minibuffer with
6113 the same non-empty string that was inserted by this function.
6114 (If DEFAULT-FILENAME is omitted, the visited file name is used,
6115 except that if INITIAL is specified, that combined with DIR is used.)
6116 If the user exits with an empty minibuffer, this function returns
6117 an empty string. (This can only happen if the user erased the
6118 pre-inserted contents or if `insert-default-directory' is nil.)
6119 Fourth arg MUSTMATCH non-nil means require existing file's name.
6120 Non-nil and non-t means also require confirmation after completion.
6121 Fifth arg INITIAL specifies text to start with.
6122 If optional sixth arg PREDICATE is non-nil, possible completions and
6123 the resulting file name must satisfy (funcall PREDICATE NAME).
6124 DIR should be an absolute directory name. It defaults to the value of
6125 `default-directory'.
6127 If this command was invoked with the mouse, use a file dialog box if
6128 `use-dialog-box' is non-nil, and the window system or X toolkit in use
6129 provides a file dialog box.
6131 See also `read-file-name-completion-ignore-case'
6132 and `read-file-name-function'. */)
6133 (prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
)
6134 Lisp_Object prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
;
6136 Lisp_Object val
, insdef
, tem
;
6137 struct gcpro gcpro1
, gcpro2
;
6138 register char *homedir
;
6139 Lisp_Object decoded_homedir
;
6140 int replace_in_history
= 0;
6141 int add_to_history
= 0;
6145 dir
= current_buffer
->directory
;
6146 if (NILP (Ffile_name_absolute_p (dir
)))
6147 dir
= Fexpand_file_name (dir
, Qnil
);
6148 if (NILP (default_filename
))
6151 ? Fexpand_file_name (initial
, dir
)
6152 : current_buffer
->filename
);
6154 /* If dir starts with user's homedir, change that to ~. */
6155 homedir
= (char *) egetenv ("HOME");
6157 /* homedir can be NULL in temacs, since Vprocess_environment is not
6158 yet set up. We shouldn't crash in that case. */
6161 homedir
= strcpy (alloca (strlen (homedir
) + 1), homedir
);
6162 CORRECT_DIR_SEPS (homedir
);
6167 = DECODE_FILE (make_unibyte_string (homedir
, strlen (homedir
)));
6170 && !strncmp (SDATA (decoded_homedir
), SDATA (dir
),
6171 SBYTES (decoded_homedir
))
6172 && IS_DIRECTORY_SEP (SREF (dir
, SBYTES (decoded_homedir
))))
6174 dir
= Fsubstring (dir
, make_number (SCHARS (decoded_homedir
)), Qnil
);
6175 dir
= concat2 (build_string ("~"), dir
);
6177 /* Likewise for default_filename. */
6179 && STRINGP (default_filename
)
6180 && !strncmp (SDATA (decoded_homedir
), SDATA (default_filename
),
6181 SBYTES (decoded_homedir
))
6182 && IS_DIRECTORY_SEP (SREF (default_filename
, SBYTES (decoded_homedir
))))
6185 = Fsubstring (default_filename
,
6186 make_number (SCHARS (decoded_homedir
)), Qnil
);
6187 default_filename
= concat2 (build_string ("~"), default_filename
);
6189 if (!NILP (default_filename
))
6191 CHECK_STRING (default_filename
);
6192 default_filename
= double_dollars (default_filename
);
6195 if (insert_default_directory
&& STRINGP (dir
))
6198 if (!NILP (initial
))
6200 Lisp_Object args
[2], pos
;
6204 insdef
= Fconcat (2, args
);
6205 pos
= make_number (SCHARS (double_dollars (dir
)));
6206 insdef
= Fcons (double_dollars (insdef
), pos
);
6209 insdef
= double_dollars (insdef
);
6211 else if (STRINGP (initial
))
6212 insdef
= Fcons (double_dollars (initial
), make_number (0));
6216 if (!NILP (Vread_file_name_function
))
6218 Lisp_Object args
[7];
6220 GCPRO2 (insdef
, default_filename
);
6221 args
[0] = Vread_file_name_function
;
6224 args
[3] = default_filename
;
6225 args
[4] = mustmatch
;
6227 args
[6] = predicate
;
6228 RETURN_UNGCPRO (Ffuncall (7, args
));
6231 count
= SPECPDL_INDEX ();
6232 specbind (intern ("completion-ignore-case"),
6233 read_file_name_completion_ignore_case
? Qt
: Qnil
);
6234 specbind (intern ("minibuffer-completing-file-name"), Qt
);
6235 specbind (intern ("read-file-name-predicate"),
6236 (NILP (predicate
) ? Qfile_exists_p
: predicate
));
6238 GCPRO2 (insdef
, default_filename
);
6240 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6241 if (! NILP (Fnext_read_file_uses_dialog_p ()))
6243 /* If DIR contains a file name, split it. */
6245 file
= Ffile_name_nondirectory (dir
);
6246 if (SCHARS (file
) && NILP (default_filename
))
6248 default_filename
= file
;
6249 dir
= Ffile_name_directory (dir
);
6251 if (!NILP(default_filename
))
6252 default_filename
= Fexpand_file_name (default_filename
, dir
);
6253 val
= Fx_file_dialog (prompt
, dir
, default_filename
, mustmatch
,
6254 EQ (predicate
, Qfile_directory_p
) ? Qt
: Qnil
);
6259 val
= Fcompleting_read (prompt
, intern ("read-file-name-internal"),
6260 dir
, mustmatch
, insdef
,
6261 Qfile_name_history
, default_filename
, Qnil
);
6263 tem
= Fsymbol_value (Qfile_name_history
);
6264 if (CONSP (tem
) && EQ (XCAR (tem
), val
))
6265 replace_in_history
= 1;
6267 /* If Fcompleting_read returned the inserted default string itself
6268 (rather than a new string with the same contents),
6269 it has to mean that the user typed RET with the minibuffer empty.
6270 In that case, we really want to return ""
6271 so that commands such as set-visited-file-name can distinguish. */
6272 if (EQ (val
, default_filename
))
6274 /* In this case, Fcompleting_read has not added an element
6275 to the history. Maybe we should. */
6276 if (! replace_in_history
)
6282 unbind_to (count
, Qnil
);
6285 error ("No file name specified");
6287 tem
= Fstring_equal (val
, CONSP (insdef
) ? XCAR (insdef
) : insdef
);
6289 if (!NILP (tem
) && !NILP (default_filename
))
6290 val
= default_filename
;
6291 val
= Fsubstitute_in_file_name (val
);
6293 if (replace_in_history
)
6294 /* Replace what Fcompleting_read added to the history
6295 with what we will actually return. */
6297 Lisp_Object val1
= double_dollars (val
);
6298 tem
= Fsymbol_value (Qfile_name_history
);
6299 if (history_delete_duplicates
)
6300 XSETCDR (tem
, Fdelete (val1
, XCDR(tem
)));
6301 XSETCAR (tem
, val1
);
6303 else if (add_to_history
)
6305 /* Add the value to the history--but not if it matches
6306 the last value already there. */
6307 Lisp_Object val1
= double_dollars (val
);
6308 tem
= Fsymbol_value (Qfile_name_history
);
6309 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
6311 if (history_delete_duplicates
) tem
= Fdelete (val1
, tem
);
6312 Fset (Qfile_name_history
, Fcons (val1
, tem
));
6323 /* Must be set before any path manipulation is performed. */
6324 XSETFASTINT (Vdirectory_sep_char
, '/');
6331 Qexpand_file_name
= intern ("expand-file-name");
6332 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
6333 Qdirectory_file_name
= intern ("directory-file-name");
6334 Qfile_name_directory
= intern ("file-name-directory");
6335 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
6336 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
6337 Qfile_name_as_directory
= intern ("file-name-as-directory");
6338 Qcopy_file
= intern ("copy-file");
6339 Qmake_directory_internal
= intern ("make-directory-internal");
6340 Qmake_directory
= intern ("make-directory");
6341 Qdelete_directory
= intern ("delete-directory");
6342 Qdelete_file
= intern ("delete-file");
6343 Qrename_file
= intern ("rename-file");
6344 Qadd_name_to_file
= intern ("add-name-to-file");
6345 Qmake_symbolic_link
= intern ("make-symbolic-link");
6346 Qfile_exists_p
= intern ("file-exists-p");
6347 Qfile_executable_p
= intern ("file-executable-p");
6348 Qfile_readable_p
= intern ("file-readable-p");
6349 Qfile_writable_p
= intern ("file-writable-p");
6350 Qfile_symlink_p
= intern ("file-symlink-p");
6351 Qaccess_file
= intern ("access-file");
6352 Qfile_directory_p
= intern ("file-directory-p");
6353 Qfile_regular_p
= intern ("file-regular-p");
6354 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
6355 Qfile_modes
= intern ("file-modes");
6356 Qset_file_modes
= intern ("set-file-modes");
6357 Qset_file_times
= intern ("set-file-times");
6358 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
6359 Qinsert_file_contents
= intern ("insert-file-contents");
6360 Qwrite_region
= intern ("write-region");
6361 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
6362 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
6363 Qauto_save_coding
= intern ("auto-save-coding");
6365 staticpro (&Qexpand_file_name
);
6366 staticpro (&Qsubstitute_in_file_name
);
6367 staticpro (&Qdirectory_file_name
);
6368 staticpro (&Qfile_name_directory
);
6369 staticpro (&Qfile_name_nondirectory
);
6370 staticpro (&Qunhandled_file_name_directory
);
6371 staticpro (&Qfile_name_as_directory
);
6372 staticpro (&Qcopy_file
);
6373 staticpro (&Qmake_directory_internal
);
6374 staticpro (&Qmake_directory
);
6375 staticpro (&Qdelete_directory
);
6376 staticpro (&Qdelete_file
);
6377 staticpro (&Qrename_file
);
6378 staticpro (&Qadd_name_to_file
);
6379 staticpro (&Qmake_symbolic_link
);
6380 staticpro (&Qfile_exists_p
);
6381 staticpro (&Qfile_executable_p
);
6382 staticpro (&Qfile_readable_p
);
6383 staticpro (&Qfile_writable_p
);
6384 staticpro (&Qaccess_file
);
6385 staticpro (&Qfile_symlink_p
);
6386 staticpro (&Qfile_directory_p
);
6387 staticpro (&Qfile_regular_p
);
6388 staticpro (&Qfile_accessible_directory_p
);
6389 staticpro (&Qfile_modes
);
6390 staticpro (&Qset_file_modes
);
6391 staticpro (&Qset_file_times
);
6392 staticpro (&Qfile_newer_than_file_p
);
6393 staticpro (&Qinsert_file_contents
);
6394 staticpro (&Qwrite_region
);
6395 staticpro (&Qverify_visited_file_modtime
);
6396 staticpro (&Qset_visited_file_modtime
);
6397 staticpro (&Qauto_save_coding
);
6399 Qfile_name_history
= intern ("file-name-history");
6400 Fset (Qfile_name_history
, Qnil
);
6401 staticpro (&Qfile_name_history
);
6403 Qfile_error
= intern ("file-error");
6404 staticpro (&Qfile_error
);
6405 Qfile_already_exists
= intern ("file-already-exists");
6406 staticpro (&Qfile_already_exists
);
6407 Qfile_date_error
= intern ("file-date-error");
6408 staticpro (&Qfile_date_error
);
6409 Qexcl
= intern ("excl");
6413 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
6414 staticpro (&Qfind_buffer_file_type
);
6417 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
6418 doc
: /* *Coding system for encoding file names.
6419 If it is nil, `default-file-name-coding-system' (which see) is used. */);
6420 Vfile_name_coding_system
= Qnil
;
6422 DEFVAR_LISP ("default-file-name-coding-system",
6423 &Vdefault_file_name_coding_system
,
6424 doc
: /* Default coding system for encoding file names.
6425 This variable is used only when `file-name-coding-system' is nil.
6427 This variable is set/changed by the command `set-language-environment'.
6428 User should not set this variable manually,
6429 instead use `file-name-coding-system' to get a constant encoding
6430 of file names regardless of the current language environment. */);
6431 Vdefault_file_name_coding_system
= Qnil
;
6433 Qformat_decode
= intern ("format-decode");
6434 staticpro (&Qformat_decode
);
6435 Qformat_annotate_function
= intern ("format-annotate-function");
6436 staticpro (&Qformat_annotate_function
);
6437 Qafter_insert_file_set_coding
= intern ("after-insert-file-set-coding");
6438 staticpro (&Qafter_insert_file_set_coding
);
6440 Qcar_less_than_car
= intern ("car-less-than-car");
6441 staticpro (&Qcar_less_than_car
);
6443 Fput (Qfile_error
, Qerror_conditions
,
6444 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
6445 Fput (Qfile_error
, Qerror_message
,
6446 build_string ("File error"));
6448 Fput (Qfile_already_exists
, Qerror_conditions
,
6449 Fcons (Qfile_already_exists
,
6450 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6451 Fput (Qfile_already_exists
, Qerror_message
,
6452 build_string ("File already exists"));
6454 Fput (Qfile_date_error
, Qerror_conditions
,
6455 Fcons (Qfile_date_error
,
6456 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6457 Fput (Qfile_date_error
, Qerror_message
,
6458 build_string ("Cannot set file date"));
6460 DEFVAR_LISP ("read-file-name-function", &Vread_file_name_function
,
6461 doc
: /* If this is non-nil, `read-file-name' does its work by calling this function. */);
6462 Vread_file_name_function
= Qnil
;
6464 DEFVAR_LISP ("read-file-name-predicate", &Vread_file_name_predicate
,
6465 doc
: /* Current predicate used by `read-file-name-internal'. */);
6466 Vread_file_name_predicate
= Qnil
;
6468 DEFVAR_BOOL ("read-file-name-completion-ignore-case", &read_file_name_completion_ignore_case
,
6469 doc
: /* *Non-nil means when reading a file name completion ignores case. */);
6470 #if defined VMS || defined DOS_NT || defined MAC_OS
6471 read_file_name_completion_ignore_case
= 1;
6473 read_file_name_completion_ignore_case
= 0;
6476 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
6477 doc
: /* *Non-nil means when reading a filename start with default dir in minibuffer.
6478 If the initial minibuffer contents are non-empty, you can usually
6479 request a default filename by typing RETURN without editing. For some
6480 commands, exiting with an empty minibuffer has a special meaning,
6481 such as making the current buffer visit no file in the case of
6482 `set-visited-file-name'.
6483 If this variable is non-nil, the minibuffer contents are always
6484 initially non-empty and typing RETURN without editing will fetch the
6485 default name, if one is provided. Note however that this default name
6486 is not necessarily the name originally inserted in the minibuffer, if
6487 that is just the default directory.
6488 If this variable is nil, the minibuffer often starts out empty. In
6489 that case you may have to explicitly fetch the next history element to
6490 request the default name. */);
6491 insert_default_directory
= 1;
6493 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
6494 doc
: /* *Non-nil means write new files with record format `stmlf'.
6495 nil means use format `var'. This variable is meaningful only on VMS. */);
6496 vms_stmlf_recfm
= 0;
6498 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
6499 doc
: /* Directory separator character for built-in functions that return file names.
6500 The value is always ?/. Don't use this variable, just use `/'. */);
6502 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
6503 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
6504 If a file name matches REGEXP, then all I/O on that file is done by calling
6507 The first argument given to HANDLER is the name of the I/O primitive
6508 to be handled; the remaining arguments are the arguments that were
6509 passed to that primitive. For example, if you do
6510 (file-exists-p FILENAME)
6511 and FILENAME is handled by HANDLER, then HANDLER is called like this:
6512 (funcall HANDLER 'file-exists-p FILENAME)
6513 The function `find-file-name-handler' checks this list for a handler
6514 for its argument. */);
6515 Vfile_name_handler_alist
= Qnil
;
6517 DEFVAR_LISP ("set-auto-coding-function",
6518 &Vset_auto_coding_function
,
6519 doc
: /* If non-nil, a function to call to decide a coding system of file.
6520 Two arguments are passed to this function: the file name
6521 and the length of a file contents following the point.
6522 This function should return a coding system to decode the file contents.
6523 It should check the file name against `auto-coding-alist'.
6524 If no coding system is decided, it should check a coding system
6525 specified in the heading lines with the format:
6526 -*- ... coding: CODING-SYSTEM; ... -*-
6527 or local variable spec of the tailing lines with `coding:' tag. */);
6528 Vset_auto_coding_function
= Qnil
;
6530 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
6531 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
6532 Each is passed one argument, the number of characters inserted.
6533 It should return the new character count, and leave point the same.
6534 If `insert-file-contents' is intercepted by a handler from
6535 `file-name-handler-alist', that handler is responsible for calling the
6536 functions in `after-insert-file-functions' if appropriate. */);
6537 Vafter_insert_file_functions
= Qnil
;
6539 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
6540 doc
: /* A list of functions to be called at the start of `write-region'.
6541 Each is passed two arguments, START and END as for `write-region'.
6542 These are usually two numbers but not always; see the documentation
6543 for `write-region'. The function should return a list of pairs
6544 of the form (POSITION . STRING), consisting of strings to be effectively
6545 inserted at the specified positions of the file being written (1 means to
6546 insert before the first byte written). The POSITIONs must be sorted into
6547 increasing order. If there are several functions in the list, the several
6548 lists are merged destructively. Alternatively, the function can return
6549 with a different buffer current; in that case it should pay attention
6550 to the annotations returned by previous functions and listed in
6551 `write-region-annotations-so-far'.*/);
6552 Vwrite_region_annotate_functions
= Qnil
;
6553 staticpro (&Qwrite_region_annotate_functions
);
6554 Qwrite_region_annotate_functions
6555 = intern ("write-region-annotate-functions");
6557 DEFVAR_LISP ("write-region-annotations-so-far",
6558 &Vwrite_region_annotations_so_far
,
6559 doc
: /* When an annotation function is called, this holds the previous annotations.
6560 These are the annotations made by other annotation functions
6561 that were already called. See also `write-region-annotate-functions'. */);
6562 Vwrite_region_annotations_so_far
= Qnil
;
6564 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
6565 doc
: /* A list of file name handlers that temporarily should not be used.
6566 This applies only to the operation `inhibit-file-name-operation'. */);
6567 Vinhibit_file_name_handlers
= Qnil
;
6569 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
6570 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
6571 Vinhibit_file_name_operation
= Qnil
;
6573 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
6574 doc
: /* File name in which we write a list of all auto save file names.
6575 This variable is initialized automatically from `auto-save-list-file-prefix'
6576 shortly after Emacs reads your `.emacs' file, if you have not yet given it
6577 a non-nil value. */);
6578 Vauto_save_list_file_name
= Qnil
;
6580 defsubr (&Sfind_file_name_handler
);
6581 defsubr (&Sfile_name_directory
);
6582 defsubr (&Sfile_name_nondirectory
);
6583 defsubr (&Sunhandled_file_name_directory
);
6584 defsubr (&Sfile_name_as_directory
);
6585 defsubr (&Sdirectory_file_name
);
6586 defsubr (&Smake_temp_name
);
6587 defsubr (&Sexpand_file_name
);
6588 defsubr (&Ssubstitute_in_file_name
);
6589 defsubr (&Scopy_file
);
6590 defsubr (&Smake_directory_internal
);
6591 defsubr (&Sdelete_directory
);
6592 defsubr (&Sdelete_file
);
6593 defsubr (&Srename_file
);
6594 defsubr (&Sadd_name_to_file
);
6596 defsubr (&Smake_symbolic_link
);
6597 #endif /* S_IFLNK */
6599 defsubr (&Sdefine_logical_name
);
6602 defsubr (&Ssysnetunam
);
6603 #endif /* HPUX_NET */
6604 defsubr (&Sfile_name_absolute_p
);
6605 defsubr (&Sfile_exists_p
);
6606 defsubr (&Sfile_executable_p
);
6607 defsubr (&Sfile_readable_p
);
6608 defsubr (&Sfile_writable_p
);
6609 defsubr (&Saccess_file
);
6610 defsubr (&Sfile_symlink_p
);
6611 defsubr (&Sfile_directory_p
);
6612 defsubr (&Sfile_accessible_directory_p
);
6613 defsubr (&Sfile_regular_p
);
6614 defsubr (&Sfile_modes
);
6615 defsubr (&Sset_file_modes
);
6616 defsubr (&Sset_file_times
);
6617 defsubr (&Sset_default_file_modes
);
6618 defsubr (&Sdefault_file_modes
);
6619 defsubr (&Sfile_newer_than_file_p
);
6620 defsubr (&Sinsert_file_contents
);
6621 defsubr (&Swrite_region
);
6622 defsubr (&Scar_less_than_car
);
6623 defsubr (&Sverify_visited_file_modtime
);
6624 defsubr (&Sclear_visited_file_modtime
);
6625 defsubr (&Svisited_file_modtime
);
6626 defsubr (&Sset_visited_file_modtime
);
6627 defsubr (&Sdo_auto_save
);
6628 defsubr (&Sset_buffer_auto_saved
);
6629 defsubr (&Sclear_buffer_auto_save_failure
);
6630 defsubr (&Srecent_auto_save_p
);
6632 defsubr (&Sread_file_name_internal
);
6633 defsubr (&Sread_file_name
);
6634 defsubr (&Snext_read_file_uses_dialog_p
);
6637 defsubr (&Sunix_sync
);
6641 /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c
6642 (do not change this comment) */