1 /* File IO for GNU Emacs.
2 Copyright (C) 1985,86,87,88,93,94,95,96,97,98,99,2000
3 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. */
22 #define _GNU_SOURCE /* for euidaccess */
26 #if defined (USG5) || defined (BSD_SYSTEM) || defined (LINUX)
31 #include <sys/types.h>
38 #if !defined (S_ISLNK) && defined (S_IFLNK)
39 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
42 #if !defined (S_ISFIFO) && defined (S_IFIFO)
43 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
46 #if !defined (S_ISREG) && defined (S_IFREG)
47 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
88 #include "intervals.h"
99 #endif /* not WINDOWSNT */
103 #include <sys/param.h>
111 #define CORRECT_DIR_SEPS(s) \
112 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
113 else unixtodos_filename (s); \
115 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
116 redirector allows the six letters between 'Z' and 'a' as well. */
118 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
121 #define IS_DRIVE(x) isalpha (x)
123 /* Need to lower-case the drive letter, or else expanded
124 filenames will sometimes compare inequal, because
125 `expand-file-name' doesn't always down-case the drive letter. */
126 #define DRIVE_LETTER(x) (tolower (x))
147 #include "commands.h"
148 extern int use_dialog_box
;
162 #define min(a, b) ((a) < (b) ? (a) : (b))
163 #define max(a, b) ((a) > (b) ? (a) : (b))
165 /* Nonzero during writing of auto-save files */
168 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
169 a new file with the same mode as the original */
170 int auto_save_mode_bits
;
172 /* Coding system for file names, or nil if none. */
173 Lisp_Object Vfile_name_coding_system
;
175 /* Coding system for file names used only when
176 Vfile_name_coding_system is nil. */
177 Lisp_Object Vdefault_file_name_coding_system
;
179 /* Alist of elements (REGEXP . HANDLER) for file names
180 whose I/O is done with a special handler. */
181 Lisp_Object Vfile_name_handler_alist
;
183 /* Format for auto-save files */
184 Lisp_Object Vauto_save_file_format
;
186 /* Lisp functions for translating file formats */
187 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
189 /* Function to be called to decide a coding system of a reading file. */
190 Lisp_Object Vset_auto_coding_function
;
192 /* Functions to be called to process text properties in inserted file. */
193 Lisp_Object Vafter_insert_file_functions
;
195 /* Functions to be called to create text property annotations for file. */
196 Lisp_Object Vwrite_region_annotate_functions
;
198 /* During build_annotations, each time an annotation function is called,
199 this holds the annotations made by the previous functions. */
200 Lisp_Object Vwrite_region_annotations_so_far
;
202 /* File name in which we write a list of all our auto save files. */
203 Lisp_Object Vauto_save_list_file_name
;
205 /* Nonzero means, when reading a filename in the minibuffer,
206 start out by inserting the default directory into the minibuffer. */
207 int insert_default_directory
;
209 /* On VMS, nonzero means write new files with record format stmlf.
210 Zero means use var format. */
213 /* On NT, specifies the directory separator character, used (eg.) when
214 expanding file names. This can be bound to / or \. */
215 Lisp_Object Vdirectory_sep_char
;
217 extern Lisp_Object Vuser_login_name
;
220 extern Lisp_Object Vw32_get_true_file_attributes
;
223 extern int minibuf_level
;
225 extern int minibuffer_auto_raise
;
227 /* These variables describe handlers that have "already" had a chance
228 to handle the current operation.
230 Vinhibit_file_name_handlers is a list of file name handlers.
231 Vinhibit_file_name_operation is the operation being handled.
232 If we try to handle that operation, we ignore those handlers. */
234 static Lisp_Object Vinhibit_file_name_handlers
;
235 static Lisp_Object Vinhibit_file_name_operation
;
237 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
239 Lisp_Object Qfile_name_history
;
241 Lisp_Object Qcar_less_than_car
;
243 static int a_write
P_ ((int, Lisp_Object
, int, int,
244 Lisp_Object
*, struct coding_system
*));
245 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
249 report_file_error (string
, data
)
253 Lisp_Object errstring
;
256 synchronize_system_messages_locale ();
257 errstring
= code_convert_string_norecord (build_string (strerror (errorno
)),
258 Vlocale_coding_system
, 0);
264 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
267 /* System error messages are capitalized. Downcase the initial
268 unless it is followed by a slash. */
269 if (XSTRING (errstring
)->data
[1] != '/')
270 XSTRING (errstring
)->data
[0] = DOWNCASE (XSTRING (errstring
)->data
[0]);
272 Fsignal (Qfile_error
,
273 Fcons (build_string (string
), Fcons (errstring
, data
)));
278 close_file_unwind (fd
)
281 emacs_close (XFASTINT (fd
));
285 /* Restore point, having saved it as a marker. */
288 restore_point_unwind (location
)
289 Lisp_Object location
;
291 Fgoto_char (location
);
292 Fset_marker (location
, Qnil
, Qnil
);
296 Lisp_Object Qexpand_file_name
;
297 Lisp_Object Qsubstitute_in_file_name
;
298 Lisp_Object Qdirectory_file_name
;
299 Lisp_Object Qfile_name_directory
;
300 Lisp_Object Qfile_name_nondirectory
;
301 Lisp_Object Qunhandled_file_name_directory
;
302 Lisp_Object Qfile_name_as_directory
;
303 Lisp_Object Qcopy_file
;
304 Lisp_Object Qmake_directory_internal
;
305 Lisp_Object Qmake_directory
;
306 Lisp_Object Qdelete_directory
;
307 Lisp_Object Qdelete_file
;
308 Lisp_Object Qrename_file
;
309 Lisp_Object Qadd_name_to_file
;
310 Lisp_Object Qmake_symbolic_link
;
311 Lisp_Object Qfile_exists_p
;
312 Lisp_Object Qfile_executable_p
;
313 Lisp_Object Qfile_readable_p
;
314 Lisp_Object Qfile_writable_p
;
315 Lisp_Object Qfile_symlink_p
;
316 Lisp_Object Qaccess_file
;
317 Lisp_Object Qfile_directory_p
;
318 Lisp_Object Qfile_regular_p
;
319 Lisp_Object Qfile_accessible_directory_p
;
320 Lisp_Object Qfile_modes
;
321 Lisp_Object Qset_file_modes
;
322 Lisp_Object Qfile_newer_than_file_p
;
323 Lisp_Object Qinsert_file_contents
;
324 Lisp_Object Qwrite_region
;
325 Lisp_Object Qverify_visited_file_modtime
;
326 Lisp_Object Qset_visited_file_modtime
;
328 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
329 "Return FILENAME's handler function for OPERATION, if it has one.\n\
330 Otherwise, return nil.\n\
331 A file name is handled if one of the regular expressions in\n\
332 `file-name-handler-alist' matches it.\n\n\
333 If OPERATION equals `inhibit-file-name-operation', then we ignore\n\
334 any handlers that are members of `inhibit-file-name-handlers',\n\
335 but we still do run any other handlers. This lets handlers\n\
336 use the standard functions without calling themselves recursively.")
337 (filename
, operation
)
338 Lisp_Object filename
, operation
;
340 /* This function must not munge the match data. */
341 Lisp_Object chain
, inhibited_handlers
;
343 CHECK_STRING (filename
, 0);
345 if (EQ (operation
, Vinhibit_file_name_operation
))
346 inhibited_handlers
= Vinhibit_file_name_handlers
;
348 inhibited_handlers
= Qnil
;
350 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
351 chain
= XCDR (chain
))
359 if (STRINGP (string
) && fast_string_match (string
, filename
) >= 0)
361 Lisp_Object handler
, tem
;
363 handler
= XCDR (elt
);
364 tem
= Fmemq (handler
, inhibited_handlers
);
375 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
377 "Return the directory component in file name FILENAME.\n\
378 Return nil if FILENAME does not include a directory.\n\
379 Otherwise return a directory spec.\n\
380 Given a Unix syntax file name, returns a string ending in slash;\n\
381 on VMS, perhaps instead a string ending in `:', `]' or `>'.")
383 Lisp_Object filename
;
385 register unsigned char *beg
;
386 register unsigned char *p
;
389 CHECK_STRING (filename
, 0);
391 /* If the file name has special constructs in it,
392 call the corresponding file handler. */
393 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
395 return call2 (handler
, Qfile_name_directory
, filename
);
397 #ifdef FILE_SYSTEM_CASE
398 filename
= FILE_SYSTEM_CASE (filename
);
400 beg
= XSTRING (filename
)->data
;
402 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
404 p
= beg
+ STRING_BYTES (XSTRING (filename
));
406 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
408 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
411 /* only recognise drive specifier at the beginning */
413 /* handle the "/:d:foo" and "/:foo" cases correctly */
414 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
415 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
422 /* Expansion of "c:" to drive and default directory. */
425 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
426 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
427 unsigned char *r
= res
;
429 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
431 strncpy (res
, beg
, 2);
436 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
438 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
441 p
= beg
+ strlen (beg
);
444 CORRECT_DIR_SEPS (beg
);
447 if (STRING_MULTIBYTE (filename
))
448 return make_string (beg
, p
- beg
);
449 return make_unibyte_string (beg
, p
- beg
);
452 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
453 Sfile_name_nondirectory
, 1, 1, 0,
454 "Return file name FILENAME sans its directory.\n\
455 For example, in a Unix-syntax file name,\n\
456 this is everything after the last slash,\n\
457 or the entire name if it contains no slash.")
459 Lisp_Object filename
;
461 register unsigned char *beg
, *p
, *end
;
464 CHECK_STRING (filename
, 0);
466 /* If the file name has special constructs in it,
467 call the corresponding file handler. */
468 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
470 return call2 (handler
, Qfile_name_nondirectory
, filename
);
472 beg
= XSTRING (filename
)->data
;
473 end
= p
= beg
+ STRING_BYTES (XSTRING (filename
));
475 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
477 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
480 /* only recognise drive specifier at beginning */
482 /* handle the "/:d:foo" case correctly */
483 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
488 if (STRING_MULTIBYTE (filename
))
489 return make_string (p
, end
- p
);
490 return make_unibyte_string (p
, end
- p
);
493 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
494 Sunhandled_file_name_directory
, 1, 1, 0,
495 "Return a directly usable directory name somehow associated with FILENAME.\n\
496 A `directly usable' directory name is one that may be used without the\n\
497 intervention of any file handler.\n\
498 If FILENAME is a directly usable file itself, return\n\
499 \(file-name-directory FILENAME).\n\
500 The `call-process' and `start-process' functions use this function to\n\
501 get a current directory to run processes in.")
503 Lisp_Object filename
;
507 /* If the file name has special constructs in it,
508 call the corresponding file handler. */
509 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
511 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
513 return Ffile_name_directory (filename
);
518 file_name_as_directory (out
, in
)
521 int size
= strlen (in
) - 1;
534 /* Is it already a directory string? */
535 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
537 /* Is it a VMS directory file name? If so, hack VMS syntax. */
538 else if (! index (in
, '/')
539 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
540 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
541 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
542 || ! strncmp (&in
[size
- 5], ".dir", 4))
543 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
544 && in
[size
] == '1')))
546 register char *p
, *dot
;
550 dir:x.dir --> dir:[x]
551 dir:[x]y.dir --> dir:[x.y] */
553 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
556 strncpy (out
, in
, p
- in
);
575 dot
= index (p
, '.');
578 /* blindly remove any extension */
579 size
= strlen (out
) + (dot
- p
);
580 strncat (out
, p
, dot
- p
);
591 /* For Unix syntax, Append a slash if necessary */
592 if (!IS_DIRECTORY_SEP (out
[size
]))
594 out
[size
+ 1] = DIRECTORY_SEP
;
595 out
[size
+ 2] = '\0';
598 CORRECT_DIR_SEPS (out
);
604 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
605 Sfile_name_as_directory
, 1, 1, 0,
606 "Return a string representing file FILENAME interpreted as a directory.\n\
607 This operation exists because a directory is also a file, but its name as\n\
608 a directory is different from its name as a file.\n\
609 The result can be used as the value of `default-directory'\n\
610 or passed as second argument to `expand-file-name'.\n\
611 For a Unix-syntax file name, just appends a slash.\n\
612 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.")
619 CHECK_STRING (file
, 0);
623 /* If the file name has special constructs in it,
624 call the corresponding file handler. */
625 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
627 return call2 (handler
, Qfile_name_as_directory
, file
);
629 buf
= (char *) alloca (STRING_BYTES (XSTRING (file
)) + 10);
630 return build_string (file_name_as_directory (buf
, XSTRING (file
)->data
));
634 * Convert from directory name to filename.
636 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
637 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
638 * On UNIX, it's simple: just make sure there isn't a terminating /
640 * Value is nonzero if the string output is different from the input.
644 directory_file_name (src
, dst
)
652 struct FAB fab
= cc$rms_fab
;
653 struct NAM nam
= cc$rms_nam
;
654 char esa
[NAM$C_MAXRSS
];
659 if (! index (src
, '/')
660 && (src
[slen
- 1] == ']'
661 || src
[slen
- 1] == ':'
662 || src
[slen
- 1] == '>'))
664 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
666 fab
.fab$b_fns
= slen
;
667 fab
.fab$l_nam
= &nam
;
668 fab
.fab$l_fop
= FAB$M_NAM
;
671 nam
.nam$b_ess
= sizeof esa
;
672 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
674 /* We call SYS$PARSE to handle such things as [--] for us. */
675 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
677 slen
= nam
.nam$b_esl
;
678 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
683 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
685 /* what about when we have logical_name:???? */
686 if (src
[slen
- 1] == ':')
687 { /* Xlate logical name and see what we get */
688 ptr
= strcpy (dst
, src
); /* upper case for getenv */
691 if ('a' <= *ptr
&& *ptr
<= 'z')
695 dst
[slen
- 1] = 0; /* remove colon */
696 if (!(src
= egetenv (dst
)))
698 /* should we jump to the beginning of this procedure?
699 Good points: allows us to use logical names that xlate
701 Bad points: can be a problem if we just translated to a device
703 For now, I'll punt and always expect VMS names, and hope for
706 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
707 { /* no recursion here! */
713 { /* not a directory spec */
718 bracket
= src
[slen
- 1];
720 /* If bracket is ']' or '>', bracket - 2 is the corresponding
722 ptr
= index (src
, bracket
- 2);
724 { /* no opening bracket */
728 if (!(rptr
= rindex (src
, '.')))
731 strncpy (dst
, src
, slen
);
735 dst
[slen
++] = bracket
;
740 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
741 then translate the device and recurse. */
742 if (dst
[slen
- 1] == ':'
743 && dst
[slen
- 2] != ':' /* skip decnet nodes */
744 && strcmp (src
+ slen
, "[000000]") == 0)
746 dst
[slen
- 1] = '\0';
747 if ((ptr
= egetenv (dst
))
748 && (rlen
= strlen (ptr
) - 1) > 0
749 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
750 && ptr
[rlen
- 1] == '.')
752 char * buf
= (char *) alloca (strlen (ptr
) + 1);
756 return directory_file_name (buf
, dst
);
761 strcat (dst
, "[000000]");
765 rlen
= strlen (rptr
) - 1;
766 strncat (dst
, rptr
, rlen
);
767 dst
[slen
+ rlen
] = '\0';
768 strcat (dst
, ".DIR.1");
772 /* Process as Unix format: just remove any final slash.
773 But leave "/" unchanged; do not change it to "". */
776 /* Handle // as root for apollo's. */
777 if ((slen
> 2 && dst
[slen
- 1] == '/')
778 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
782 && IS_DIRECTORY_SEP (dst
[slen
- 1])
784 && !IS_ANY_SEP (dst
[slen
- 2])
790 CORRECT_DIR_SEPS (dst
);
795 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
797 "Returns the file name of the directory named DIRECTORY.\n\
798 This is the name of the file that holds the data for the directory DIRECTORY.\n\
799 This operation exists because a directory is also a file, but its name as\n\
800 a directory is different from its name as a file.\n\
801 In Unix-syntax, this function just removes the final slash.\n\
802 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\
803 it returns a file name such as \"[X]Y.DIR.1\".")
805 Lisp_Object directory
;
810 CHECK_STRING (directory
, 0);
812 if (NILP (directory
))
815 /* If the file name has special constructs in it,
816 call the corresponding file handler. */
817 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
819 return call2 (handler
, Qdirectory_file_name
, directory
);
822 /* 20 extra chars is insufficient for VMS, since we might perform a
823 logical name translation. an equivalence string can be up to 255
824 chars long, so grab that much extra space... - sss */
825 buf
= (char *) alloca (STRING_BYTES (XSTRING (directory
)) + 20 + 255);
827 buf
= (char *) alloca (STRING_BYTES (XSTRING (directory
)) + 20);
829 directory_file_name (XSTRING (directory
)->data
, buf
);
830 return build_string (buf
);
833 static char make_temp_name_tbl
[64] =
835 'A','B','C','D','E','F','G','H',
836 'I','J','K','L','M','N','O','P',
837 'Q','R','S','T','U','V','W','X',
838 'Y','Z','a','b','c','d','e','f',
839 'g','h','i','j','k','l','m','n',
840 'o','p','q','r','s','t','u','v',
841 'w','x','y','z','0','1','2','3',
842 '4','5','6','7','8','9','-','_'
845 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
847 /* Value is a temporary file name starting with PREFIX, a string.
849 The Emacs process number forms part of the result, so there is
850 no danger of generating a name being used by another process.
851 In addition, this function makes an attempt to choose a name
852 which has no existing file. To make this work, PREFIX should be
853 an absolute file name.
855 BASE64_P non-zero means add the pid as 3 characters in base64
856 encoding. In this case, 6 characters will be added to PREFIX to
857 form the file name. Otherwise, if Emacs is running on a system
858 with long file names, add the pid as a decimal number.
860 This function signals an error if no unique file name could be
864 make_temp_name (prefix
, base64_p
)
871 unsigned char *p
, *data
;
875 CHECK_STRING (prefix
, 0);
877 /* VAL is created by adding 6 characters to PREFIX. The first
878 three are the PID of this process, in base 64, and the second
879 three are incremented if the file already exists. This ensures
880 262144 unique file names per PID per PREFIX. */
882 pid
= (int) getpid ();
886 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
887 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
888 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
893 #ifdef HAVE_LONG_FILE_NAMES
894 sprintf (pidbuf
, "%d", pid
);
895 pidlen
= strlen (pidbuf
);
897 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
898 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
899 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
904 len
= XSTRING (prefix
)->size
;
905 val
= make_uninit_string (len
+ 3 + pidlen
);
906 data
= XSTRING (val
)->data
;
907 bcopy(XSTRING (prefix
)->data
, data
, len
);
910 bcopy (pidbuf
, p
, pidlen
);
913 /* Here we try to minimize useless stat'ing when this function is
914 invoked many times successively with the same PREFIX. We achieve
915 this by initializing count to a random value, and incrementing it
918 We don't want make-temp-name to be called while dumping,
919 because then make_temp_name_count_initialized_p would get set
920 and then make_temp_name_count would not be set when Emacs starts. */
922 if (!make_temp_name_count_initialized_p
)
924 make_temp_name_count
= (unsigned) time (NULL
);
925 make_temp_name_count_initialized_p
= 1;
931 unsigned num
= make_temp_name_count
;
933 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
934 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
935 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
937 /* Poor man's congruential RN generator. Replace with
938 ++make_temp_name_count for debugging. */
939 make_temp_name_count
+= 25229;
940 make_temp_name_count
%= 225307;
942 if (stat (data
, &ignored
) < 0)
944 /* We want to return only if errno is ENOENT. */
948 /* The error here is dubious, but there is little else we
949 can do. The alternatives are to return nil, which is
950 as bad as (and in many cases worse than) throwing the
951 error, or to ignore the error, which will likely result
952 in looping through 225307 stat's, which is not only
953 dog-slow, but also useless since it will fallback to
954 the errow below, anyway. */
955 report_file_error ("Cannot create temporary name for prefix",
956 Fcons (prefix
, Qnil
));
961 error ("Cannot create temporary name for prefix `%s'",
962 XSTRING (prefix
)->data
);
967 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
968 "Generate temporary file name (string) starting with PREFIX (a string).\n\
969 The Emacs process number forms part of the result,\n\
970 so there is no danger of generating a name being used by another process.\n\
972 In addition, this function makes an attempt to choose a name\n\
973 which has no existing file. To make this work,\n\
974 PREFIX should be an absolute file name.\n\
976 There is a race condition between calling `make-temp-name' and creating the\n\
977 file which opens all kinds of security holes. For that reason, you should\n\
978 probably use `make-temp-file' instead.")
982 return make_temp_name (prefix
, 0);
987 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
988 "Convert filename NAME to absolute, and canonicalize it.\n\
989 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative\n\
990 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,\n\
991 the current buffer's value of default-directory is used.\n\
992 File name components that are `.' are removed, and \n\
993 so are file name components followed by `..', along with the `..' itself;\n\
994 note that these simplifications are done without checking the resulting\n\
995 file names in the file system.\n\
996 An initial `~/' expands to your home directory.\n\
997 An initial `~USER/' expands to USER's home directory.\n\
998 See also the function `substitute-in-file-name'.")
999 (name
, default_directory
)
1000 Lisp_Object name
, default_directory
;
1004 register unsigned char *newdir
, *p
, *o
;
1006 unsigned char *target
;
1009 unsigned char * colon
= 0;
1010 unsigned char * close
= 0;
1011 unsigned char * slash
= 0;
1012 unsigned char * brack
= 0;
1013 int lbrack
= 0, rbrack
= 0;
1018 int collapse_newdir
= 1;
1022 Lisp_Object handler
;
1024 CHECK_STRING (name
, 0);
1026 /* If the file name has special constructs in it,
1027 call the corresponding file handler. */
1028 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1029 if (!NILP (handler
))
1030 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1032 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1033 if (NILP (default_directory
))
1034 default_directory
= current_buffer
->directory
;
1035 if (! STRINGP (default_directory
))
1036 default_directory
= build_string ("/");
1038 if (!NILP (default_directory
))
1040 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1041 if (!NILP (handler
))
1042 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1045 o
= XSTRING (default_directory
)->data
;
1047 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1048 It would be better to do this down below where we actually use
1049 default_directory. Unfortunately, calling Fexpand_file_name recursively
1050 could invoke GC, and the strings might be relocated. This would
1051 be annoying because we have pointers into strings lying around
1052 that would need adjusting, and people would add new pointers to
1053 the code and forget to adjust them, resulting in intermittent bugs.
1054 Putting this call here avoids all that crud.
1056 The EQ test avoids infinite recursion. */
1057 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1058 /* Save time in some common cases - as long as default_directory
1059 is not relative, it can be canonicalized with name below (if it
1060 is needed at all) without requiring it to be expanded now. */
1062 /* Detect MSDOS file names with drive specifiers. */
1063 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1065 /* Detect Windows file names in UNC format. */
1066 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1068 #else /* not DOS_NT */
1069 /* Detect Unix absolute file names (/... alone is not absolute on
1071 && ! (IS_DIRECTORY_SEP (o
[0]))
1072 #endif /* not DOS_NT */
1075 struct gcpro gcpro1
;
1078 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1083 /* Filenames on VMS are always upper case. */
1084 name
= Fupcase (name
);
1086 #ifdef FILE_SYSTEM_CASE
1087 name
= FILE_SYSTEM_CASE (name
);
1090 nm
= XSTRING (name
)->data
;
1093 /* We will force directory separators to be either all \ or /, so make
1094 a local copy to modify, even if there ends up being no change. */
1095 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1097 /* Note if special escape prefix is present, but remove for now. */
1098 if (nm
[0] == '/' && nm
[1] == ':')
1104 /* Find and remove drive specifier if present; this makes nm absolute
1105 even if the rest of the name appears to be relative. Only look for
1106 drive specifier at the beginning. */
1107 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1114 /* If we see "c://somedir", we want to strip the first slash after the
1115 colon when stripping the drive letter. Otherwise, this expands to
1117 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1119 #endif /* WINDOWSNT */
1123 /* Discard any previous drive specifier if nm is now in UNC format. */
1124 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1130 /* If nm is absolute, look for /./ or /../ sequences; if none are
1131 found, we can probably return right away. We will avoid allocating
1132 a new string if name is already fully expanded. */
1134 IS_DIRECTORY_SEP (nm
[0])
1136 && drive
&& !is_escaped
1139 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1146 /* If it turns out that the filename we want to return is just a
1147 suffix of FILENAME, we don't need to go through and edit
1148 things; we just need to construct a new string using data
1149 starting at the middle of FILENAME. If we set lose to a
1150 non-zero value, that means we've discovered that we can't do
1157 /* Since we know the name is absolute, we can assume that each
1158 element starts with a "/". */
1160 /* "." and ".." are hairy. */
1161 if (IS_DIRECTORY_SEP (p
[0])
1163 && (IS_DIRECTORY_SEP (p
[2])
1165 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1172 /* if dev:[dir]/, move nm to / */
1173 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1174 nm
= (brack
? brack
+ 1 : colon
+ 1);
1175 lbrack
= rbrack
= 0;
1183 /* VMS pre V4.4,convert '-'s in filenames. */
1184 if (lbrack
== rbrack
)
1186 if (dots
< 2) /* this is to allow negative version numbers */
1191 if (lbrack
> rbrack
&&
1192 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1193 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1199 /* count open brackets, reset close bracket pointer */
1200 if (p
[0] == '[' || p
[0] == '<')
1201 lbrack
++, brack
= 0;
1202 /* count close brackets, set close bracket pointer */
1203 if (p
[0] == ']' || p
[0] == '>')
1204 rbrack
++, brack
= p
;
1205 /* detect ][ or >< */
1206 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1208 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1209 nm
= p
+ 1, lose
= 1;
1210 if (p
[0] == ':' && (colon
|| slash
))
1211 /* if dev1:[dir]dev2:, move nm to dev2: */
1217 /* if /name/dev:, move nm to dev: */
1220 /* if node::dev:, move colon following dev */
1221 else if (colon
&& colon
[-1] == ':')
1223 /* if dev1:dev2:, move nm to dev2: */
1224 else if (colon
&& colon
[-1] != ':')
1229 if (p
[0] == ':' && !colon
)
1235 if (lbrack
== rbrack
)
1238 else if (p
[0] == '.')
1246 if (index (nm
, '/'))
1247 return build_string (sys_translate_unix (nm
));
1250 /* Make sure directories are all separated with / or \ as
1251 desired, but avoid allocation of a new string when not
1253 CORRECT_DIR_SEPS (nm
);
1255 if (IS_DIRECTORY_SEP (nm
[1]))
1257 if (strcmp (nm
, XSTRING (name
)->data
) != 0)
1258 name
= build_string (nm
);
1262 /* drive must be set, so this is okay */
1263 if (strcmp (nm
- 2, XSTRING (name
)->data
) != 0)
1265 name
= make_string (nm
- 2, p
- nm
+ 2);
1266 XSTRING (name
)->data
[0] = DRIVE_LETTER (drive
);
1267 XSTRING (name
)->data
[1] = ':';
1270 #else /* not DOS_NT */
1271 if (nm
== XSTRING (name
)->data
)
1273 return build_string (nm
);
1274 #endif /* not DOS_NT */
1278 /* At this point, nm might or might not be an absolute file name. We
1279 need to expand ~ or ~user if present, otherwise prefix nm with
1280 default_directory if nm is not absolute, and finally collapse /./
1281 and /foo/../ sequences.
1283 We set newdir to be the appropriate prefix if one is needed:
1284 - the relevant user directory if nm starts with ~ or ~user
1285 - the specified drive's working dir (DOS/NT only) if nm does not
1287 - the value of default_directory.
1289 Note that these prefixes are not guaranteed to be absolute (except
1290 for the working dir of a drive). Therefore, to ensure we always
1291 return an absolute name, if the final prefix is not absolute we
1292 append it to the current working directory. */
1296 if (nm
[0] == '~') /* prefix ~ */
1298 if (IS_DIRECTORY_SEP (nm
[1])
1302 || nm
[1] == 0) /* ~ by itself */
1304 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1305 newdir
= (unsigned char *) "";
1308 collapse_newdir
= 0;
1311 nm
++; /* Don't leave the slash in nm. */
1314 else /* ~user/filename */
1316 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1321 o
= (unsigned char *) alloca (p
- nm
+ 1);
1322 bcopy ((char *) nm
, o
, p
- nm
);
1325 pw
= (struct passwd
*) getpwnam (o
+ 1);
1328 newdir
= (unsigned char *) pw
-> pw_dir
;
1330 nm
= p
+ 1; /* skip the terminator */
1334 collapse_newdir
= 0;
1339 /* If we don't find a user of that name, leave the name
1340 unchanged; don't move nm forward to p. */
1345 /* On DOS and Windows, nm is absolute if a drive name was specified;
1346 use the drive's current directory as the prefix if needed. */
1347 if (!newdir
&& drive
)
1349 /* Get default directory if needed to make nm absolute. */
1350 if (!IS_DIRECTORY_SEP (nm
[0]))
1352 newdir
= alloca (MAXPATHLEN
+ 1);
1353 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1358 /* Either nm starts with /, or drive isn't mounted. */
1359 newdir
= alloca (4);
1360 newdir
[0] = DRIVE_LETTER (drive
);
1368 /* Finally, if no prefix has been specified and nm is not absolute,
1369 then it must be expanded relative to default_directory. */
1373 /* /... alone is not absolute on DOS and Windows. */
1374 && !IS_DIRECTORY_SEP (nm
[0])
1377 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1384 newdir
= XSTRING (default_directory
)->data
;
1386 /* Note if special escape prefix is present, but remove for now. */
1387 if (newdir
[0] == '/' && newdir
[1] == ':')
1398 /* First ensure newdir is an absolute name. */
1400 /* Detect MSDOS file names with drive specifiers. */
1401 ! (IS_DRIVE (newdir
[0])
1402 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1404 /* Detect Windows file names in UNC format. */
1405 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1409 /* Effectively, let newdir be (expand-file-name newdir cwd).
1410 Because of the admonition against calling expand-file-name
1411 when we have pointers into lisp strings, we accomplish this
1412 indirectly by prepending newdir to nm if necessary, and using
1413 cwd (or the wd of newdir's drive) as the new newdir. */
1415 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1420 if (!IS_DIRECTORY_SEP (nm
[0]))
1422 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1423 file_name_as_directory (tmp
, newdir
);
1427 newdir
= alloca (MAXPATHLEN
+ 1);
1430 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1437 /* Strip off drive name from prefix, if present. */
1438 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1444 /* Keep only a prefix from newdir if nm starts with slash
1445 (//server/share for UNC, nothing otherwise). */
1446 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1449 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1451 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1453 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1455 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1467 /* Get rid of any slash at the end of newdir, unless newdir is
1468 just / or // (an incomplete UNC name). */
1469 length
= strlen (newdir
);
1470 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1472 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1476 unsigned char *temp
= (unsigned char *) alloca (length
);
1477 bcopy (newdir
, temp
, length
- 1);
1478 temp
[length
- 1] = 0;
1486 /* Now concatenate the directory and name to new space in the stack frame */
1487 tlen
+= strlen (nm
) + 1;
1489 /* Reserve space for drive specifier and escape prefix, since either
1490 or both may need to be inserted. (The Microsoft x86 compiler
1491 produces incorrect code if the following two lines are combined.) */
1492 target
= (unsigned char *) alloca (tlen
+ 4);
1494 #else /* not DOS_NT */
1495 target
= (unsigned char *) alloca (tlen
);
1496 #endif /* not DOS_NT */
1502 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1505 /* If newdir is effectively "C:/", then the drive letter will have
1506 been stripped and newdir will be "/". Concatenating with an
1507 absolute directory in nm produces "//", which will then be
1508 incorrectly treated as a network share. Ignore newdir in
1509 this case (keeping the drive letter). */
1510 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1511 && newdir
[1] == '\0'))
1513 strcpy (target
, newdir
);
1517 file_name_as_directory (target
, newdir
);
1520 strcat (target
, nm
);
1522 if (index (target
, '/'))
1523 strcpy (target
, sys_translate_unix (target
));
1526 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1528 /* Now canonicalize by removing /. and /foo/.. if they appear. */
1536 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1542 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1543 /* brackets are offset from each other by 2 */
1546 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1547 /* convert [foo][bar] to [bar] */
1548 while (o
[-1] != '[' && o
[-1] != '<')
1550 else if (*p
== '-' && *o
!= '.')
1553 else if (p
[0] == '-' && o
[-1] == '.' &&
1554 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1555 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1559 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1560 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1562 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1564 /* else [foo.-] ==> [-] */
1570 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1571 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1577 if (!IS_DIRECTORY_SEP (*p
))
1581 else if (IS_DIRECTORY_SEP (p
[0])
1583 && (IS_DIRECTORY_SEP (p
[2])
1586 /* If "/." is the entire filename, keep the "/". Otherwise,
1587 just delete the whole "/.". */
1588 if (o
== target
&& p
[2] == '\0')
1592 else if (IS_DIRECTORY_SEP (p
[0]) && p
[1] == '.' && p
[2] == '.'
1593 /* `/../' is the "superroot" on certain file systems. */
1595 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1597 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1599 /* Keep initial / only if this is the whole name. */
1600 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1608 #endif /* not VMS */
1612 /* At last, set drive name. */
1614 /* Except for network file name. */
1615 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1616 #endif /* WINDOWSNT */
1618 if (!drive
) abort ();
1620 target
[0] = DRIVE_LETTER (drive
);
1623 /* Reinsert the escape prefix if required. */
1630 CORRECT_DIR_SEPS (target
);
1633 return make_string (target
, o
- target
);
1637 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1638 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1639 "Convert FILENAME to absolute, and canonicalize it.\n\
1640 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1641 (does not start with slash); if DEFAULT is nil or missing,\n\
1642 the current buffer's value of default-directory is used.\n\
1643 Filenames containing `.' or `..' as components are simplified;\n\
1644 initial `~/' expands to your home directory.\n\
1645 See also the function `substitute-in-file-name'.")
1647 Lisp_Object name
, defalt
;
1651 register unsigned char *newdir
, *p
, *o
;
1653 unsigned char *target
;
1657 unsigned char * colon
= 0;
1658 unsigned char * close
= 0;
1659 unsigned char * slash
= 0;
1660 unsigned char * brack
= 0;
1661 int lbrack
= 0, rbrack
= 0;
1665 CHECK_STRING (name
, 0);
1668 /* Filenames on VMS are always upper case. */
1669 name
= Fupcase (name
);
1672 nm
= XSTRING (name
)->data
;
1674 /* If nm is absolute, flush ...// and detect /./ and /../.
1675 If no /./ or /../ we can return right away. */
1687 if (p
[0] == '/' && p
[1] == '/'
1689 /* // at start of filename is meaningful on Apollo system. */
1694 if (p
[0] == '/' && p
[1] == '~')
1695 nm
= p
+ 1, lose
= 1;
1696 if (p
[0] == '/' && p
[1] == '.'
1697 && (p
[2] == '/' || p
[2] == 0
1698 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1704 /* if dev:[dir]/, move nm to / */
1705 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1706 nm
= (brack
? brack
+ 1 : colon
+ 1);
1707 lbrack
= rbrack
= 0;
1715 /* VMS pre V4.4,convert '-'s in filenames. */
1716 if (lbrack
== rbrack
)
1718 if (dots
< 2) /* this is to allow negative version numbers */
1723 if (lbrack
> rbrack
&&
1724 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1725 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1731 /* count open brackets, reset close bracket pointer */
1732 if (p
[0] == '[' || p
[0] == '<')
1733 lbrack
++, brack
= 0;
1734 /* count close brackets, set close bracket pointer */
1735 if (p
[0] == ']' || p
[0] == '>')
1736 rbrack
++, brack
= p
;
1737 /* detect ][ or >< */
1738 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1740 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1741 nm
= p
+ 1, lose
= 1;
1742 if (p
[0] == ':' && (colon
|| slash
))
1743 /* if dev1:[dir]dev2:, move nm to dev2: */
1749 /* If /name/dev:, move nm to dev: */
1752 /* If node::dev:, move colon following dev */
1753 else if (colon
&& colon
[-1] == ':')
1755 /* If dev1:dev2:, move nm to dev2: */
1756 else if (colon
&& colon
[-1] != ':')
1761 if (p
[0] == ':' && !colon
)
1767 if (lbrack
== rbrack
)
1770 else if (p
[0] == '.')
1778 if (index (nm
, '/'))
1779 return build_string (sys_translate_unix (nm
));
1781 if (nm
== XSTRING (name
)->data
)
1783 return build_string (nm
);
1787 /* Now determine directory to start with and put it in NEWDIR */
1791 if (nm
[0] == '~') /* prefix ~ */
1796 || nm
[1] == 0)/* ~/filename */
1798 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1799 newdir
= (unsigned char *) "";
1802 nm
++; /* Don't leave the slash in nm. */
1805 else /* ~user/filename */
1807 /* Get past ~ to user */
1808 unsigned char *user
= nm
+ 1;
1809 /* Find end of name. */
1810 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1811 int len
= ptr
? ptr
- user
: strlen (user
);
1813 unsigned char *ptr1
= index (user
, ':');
1814 if (ptr1
!= 0 && ptr1
- user
< len
)
1817 /* Copy the user name into temp storage. */
1818 o
= (unsigned char *) alloca (len
+ 1);
1819 bcopy ((char *) user
, o
, len
);
1822 /* Look up the user name. */
1823 pw
= (struct passwd
*) getpwnam (o
+ 1);
1825 error ("\"%s\" isn't a registered user", o
+ 1);
1827 newdir
= (unsigned char *) pw
->pw_dir
;
1829 /* Discard the user name from NM. */
1836 #endif /* not VMS */
1840 defalt
= current_buffer
->directory
;
1841 CHECK_STRING (defalt
, 1);
1842 newdir
= XSTRING (defalt
)->data
;
1845 /* Now concatenate the directory and name to new space in the stack frame */
1847 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1848 target
= (unsigned char *) alloca (tlen
);
1854 if (nm
[0] == 0 || nm
[0] == '/')
1855 strcpy (target
, newdir
);
1858 file_name_as_directory (target
, newdir
);
1861 strcat (target
, nm
);
1863 if (index (target
, '/'))
1864 strcpy (target
, sys_translate_unix (target
));
1867 /* Now canonicalize by removing /. and /foo/.. if they appear */
1875 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1881 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1882 /* brackets are offset from each other by 2 */
1885 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1886 /* convert [foo][bar] to [bar] */
1887 while (o
[-1] != '[' && o
[-1] != '<')
1889 else if (*p
== '-' && *o
!= '.')
1892 else if (p
[0] == '-' && o
[-1] == '.' &&
1893 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1894 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1898 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1899 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1901 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1903 /* else [foo.-] ==> [-] */
1909 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1910 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1920 else if (!strncmp (p
, "//", 2)
1922 /* // at start of filename is meaningful in Apollo system. */
1930 else if (p
[0] == '/' && p
[1] == '.' &&
1931 (p
[2] == '/' || p
[2] == 0))
1933 else if (!strncmp (p
, "/..", 3)
1934 /* `/../' is the "superroot" on certain file systems. */
1936 && (p
[3] == '/' || p
[3] == 0))
1938 while (o
!= target
&& *--o
!= '/')
1941 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
1945 if (o
== target
&& *o
== '/')
1953 #endif /* not VMS */
1956 return make_string (target
, o
- target
);
1960 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
1961 Ssubstitute_in_file_name
, 1, 1, 0,
1962 "Substitute environment variables referred to in FILENAME.\n\
1963 `$FOO' where FOO is an environment variable name means to substitute\n\
1964 the value of that variable. The variable name should be terminated\n\
1965 with a character not a letter, digit or underscore; otherwise, enclose\n\
1966 the entire variable name in braces.\n\
1967 If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\
1968 On VMS, `$' substitution is not done; this function does little and only\n\
1969 duplicates what `expand-file-name' does.")
1971 Lisp_Object filename
;
1975 register unsigned char *s
, *p
, *o
, *x
, *endp
;
1976 unsigned char *target
;
1978 int substituted
= 0;
1980 Lisp_Object handler
;
1982 CHECK_STRING (filename
, 0);
1984 /* If the file name has special constructs in it,
1985 call the corresponding file handler. */
1986 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
1987 if (!NILP (handler
))
1988 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
1990 nm
= XSTRING (filename
)->data
;
1992 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1993 CORRECT_DIR_SEPS (nm
);
1994 substituted
= (strcmp (nm
, XSTRING (filename
)->data
) != 0);
1996 endp
= nm
+ STRING_BYTES (XSTRING (filename
));
1998 /* If /~ or // appears, discard everything through first slash. */
2000 for (p
= nm
; p
!= endp
; p
++)
2003 #if defined (APOLLO) || defined (WINDOWSNT)
2004 /* // at start of file name is meaningful in Apollo and
2005 WindowsNT systems. */
2006 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != nm
)
2007 #else /* not (APOLLO || WINDOWSNT) */
2008 || IS_DIRECTORY_SEP (p
[0])
2009 #endif /* not (APOLLO || WINDOWSNT) */
2014 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2016 || IS_DIRECTORY_SEP (p
[-1])))
2022 /* see comment in expand-file-name about drive specifiers */
2023 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2024 && p
> nm
&& IS_DIRECTORY_SEP (p
[-1]))
2033 return build_string (nm
);
2036 /* See if any variables are substituted into the string
2037 and find the total length of their values in `total' */
2039 for (p
= nm
; p
!= endp
;)
2049 /* "$$" means a single "$" */
2058 while (p
!= endp
&& *p
!= '}') p
++;
2059 if (*p
!= '}') goto missingclose
;
2065 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2069 /* Copy out the variable name */
2070 target
= (unsigned char *) alloca (s
- o
+ 1);
2071 strncpy (target
, o
, s
- o
);
2074 strupr (target
); /* $home == $HOME etc. */
2077 /* Get variable value */
2078 o
= (unsigned char *) egetenv (target
);
2079 if (!o
) goto badvar
;
2080 total
+= strlen (o
);
2087 /* If substitution required, recopy the string and do it */
2088 /* Make space in stack frame for the new copy */
2089 xnm
= (unsigned char *) alloca (STRING_BYTES (XSTRING (filename
)) + total
+ 1);
2092 /* Copy the rest of the name through, replacing $ constructs with values */
2109 while (p
!= endp
&& *p
!= '}') p
++;
2110 if (*p
!= '}') goto missingclose
;
2116 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2120 /* Copy out the variable name */
2121 target
= (unsigned char *) alloca (s
- o
+ 1);
2122 strncpy (target
, o
, s
- o
);
2125 strupr (target
); /* $home == $HOME etc. */
2128 /* Get variable value */
2129 o
= (unsigned char *) egetenv (target
);
2133 if (STRING_MULTIBYTE (filename
))
2135 /* If the original string is multibyte,
2136 convert what we substitute into multibyte. */
2139 int c
= unibyte_char_to_multibyte (*o
++);
2140 x
+= CHAR_STRING (c
, x
);
2152 /* If /~ or // appears, discard everything through first slash. */
2154 for (p
= xnm
; p
!= x
; p
++)
2156 #if defined (APOLLO) || defined (WINDOWSNT)
2157 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != xnm
)
2158 #else /* not (APOLLO || WINDOWSNT) */
2159 || IS_DIRECTORY_SEP (p
[0])
2160 #endif /* not (APOLLO || WINDOWSNT) */
2162 && p
!= xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2165 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2166 && p
> xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2170 if (STRING_MULTIBYTE (filename
))
2171 return make_string (xnm
, x
- xnm
);
2172 return make_unibyte_string (xnm
, x
- xnm
);
2175 error ("Bad format environment-variable substitution");
2177 error ("Missing \"}\" in environment-variable substitution");
2179 error ("Substituting nonexistent environment variable \"%s\"", target
);
2182 #endif /* not VMS */
2185 /* A slightly faster and more convenient way to get
2186 (directory-file-name (expand-file-name FOO)). */
2189 expand_and_dir_to_file (filename
, defdir
)
2190 Lisp_Object filename
, defdir
;
2192 register Lisp_Object absname
;
2194 absname
= Fexpand_file_name (filename
, defdir
);
2197 register int c
= XSTRING (absname
)->data
[STRING_BYTES (XSTRING (absname
)) - 1];
2198 if (c
== ':' || c
== ']' || c
== '>')
2199 absname
= Fdirectory_file_name (absname
);
2202 /* Remove final slash, if any (unless this is the root dir).
2203 stat behaves differently depending! */
2204 if (XSTRING (absname
)->size
> 1
2205 && IS_DIRECTORY_SEP (XSTRING (absname
)->data
[STRING_BYTES (XSTRING (absname
)) - 1])
2206 && !IS_DEVICE_SEP (XSTRING (absname
)->data
[STRING_BYTES (XSTRING (absname
))-2]))
2207 /* We cannot take shortcuts; they might be wrong for magic file names. */
2208 absname
= Fdirectory_file_name (absname
);
2213 /* Signal an error if the file ABSNAME already exists.
2214 If INTERACTIVE is nonzero, ask the user whether to proceed,
2215 and bypass the error if the user says to go ahead.
2216 QUERYSTRING is a name for the action that is being considered
2219 *STATPTR is used to store the stat information if the file exists.
2220 If the file does not exist, STATPTR->st_mode is set to 0.
2221 If STATPTR is null, we don't store into it.
2223 If QUICK is nonzero, we ask for y or n, not yes or no. */
2226 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2227 Lisp_Object absname
;
2228 unsigned char *querystring
;
2230 struct stat
*statptr
;
2233 register Lisp_Object tem
, encoded_filename
;
2234 struct stat statbuf
;
2235 struct gcpro gcpro1
;
2237 encoded_filename
= ENCODE_FILE (absname
);
2239 /* stat is a good way to tell whether the file exists,
2240 regardless of what access permissions it has. */
2241 if (stat (XSTRING (encoded_filename
)->data
, &statbuf
) >= 0)
2244 Fsignal (Qfile_already_exists
,
2245 Fcons (build_string ("File already exists"),
2246 Fcons (absname
, Qnil
)));
2248 tem
= format1 ("File %s already exists; %s anyway? ",
2249 XSTRING (absname
)->data
, querystring
);
2251 tem
= Fy_or_n_p (tem
);
2253 tem
= do_yes_or_no_p (tem
);
2256 Fsignal (Qfile_already_exists
,
2257 Fcons (build_string ("File already exists"),
2258 Fcons (absname
, Qnil
)));
2265 statptr
->st_mode
= 0;
2270 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 4,
2271 "fCopy file: \nFCopy %s to file: \np\nP",
2272 "Copy FILE to NEWNAME. Both args must be strings.\n\
2273 Signals a `file-already-exists' error if file NEWNAME already exists,\n\
2274 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\
2275 A number as third arg means request confirmation if NEWNAME already exists.\n\
2276 This is what happens in interactive use with M-x.\n\
2277 Fourth arg KEEP-TIME non-nil means give the new file the same\n\
2278 last-modified time as the old one. (This works on only some systems.)\n\
2279 A prefix arg makes KEEP-TIME non-nil.")
2280 (file
, newname
, ok_if_already_exists
, keep_date
)
2281 Lisp_Object file
, newname
, ok_if_already_exists
, keep_date
;
2284 char buf
[16 * 1024];
2285 struct stat st
, out_st
;
2286 Lisp_Object handler
;
2287 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2288 int count
= specpdl_ptr
- specpdl
;
2289 int input_file_statable_p
;
2290 Lisp_Object encoded_file
, encoded_newname
;
2292 encoded_file
= encoded_newname
= Qnil
;
2293 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2294 CHECK_STRING (file
, 0);
2295 CHECK_STRING (newname
, 1);
2297 file
= Fexpand_file_name (file
, Qnil
);
2298 newname
= Fexpand_file_name (newname
, Qnil
);
2300 /* If the input file name has special constructs in it,
2301 call the corresponding file handler. */
2302 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2303 /* Likewise for output file name. */
2305 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2306 if (!NILP (handler
))
2307 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2308 ok_if_already_exists
, keep_date
));
2310 encoded_file
= ENCODE_FILE (file
);
2311 encoded_newname
= ENCODE_FILE (newname
);
2313 if (NILP (ok_if_already_exists
)
2314 || INTEGERP (ok_if_already_exists
))
2315 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2316 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2317 else if (stat (XSTRING (encoded_newname
)->data
, &out_st
) < 0)
2320 ifd
= emacs_open (XSTRING (encoded_file
)->data
, O_RDONLY
, 0);
2322 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2324 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2326 /* We can only copy regular files and symbolic links. Other files are not
2328 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2330 #if !defined (DOS_NT) || __DJGPP__ > 1
2331 if (out_st
.st_mode
!= 0
2332 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2335 report_file_error ("Input and output files are the same",
2336 Fcons (file
, Fcons (newname
, Qnil
)));
2340 #if defined (S_ISREG) && defined (S_ISLNK)
2341 if (input_file_statable_p
)
2343 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2345 #if defined (EISDIR)
2346 /* Get a better looking error message. */
2349 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2352 #endif /* S_ISREG && S_ISLNK */
2355 /* Create the copy file with the same record format as the input file */
2356 ofd
= sys_creat (XSTRING (encoded_newname
)->data
, 0666, ifd
);
2359 /* System's default file type was set to binary by _fmode in emacs.c. */
2360 ofd
= creat (XSTRING (encoded_newname
)->data
, S_IREAD
| S_IWRITE
);
2361 #else /* not MSDOS */
2362 ofd
= creat (XSTRING (encoded_newname
)->data
, 0666);
2363 #endif /* not MSDOS */
2366 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2368 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2372 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2373 if (emacs_write (ofd
, buf
, n
) != n
)
2374 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2377 /* Closing the output clobbers the file times on some systems. */
2378 if (emacs_close (ofd
) < 0)
2379 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2381 if (input_file_statable_p
)
2383 if (!NILP (keep_date
))
2385 EMACS_TIME atime
, mtime
;
2386 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2387 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2388 if (set_file_times (XSTRING (encoded_newname
)->data
,
2390 Fsignal (Qfile_date_error
,
2391 Fcons (build_string ("Cannot set file date"),
2392 Fcons (newname
, Qnil
)));
2395 chmod (XSTRING (encoded_newname
)->data
, st
.st_mode
& 07777);
2397 #if defined (__DJGPP__) && __DJGPP__ > 1
2398 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2399 and if it can't, it tells so. Otherwise, under MSDOS we usually
2400 get only the READ bit, which will make the copied file read-only,
2401 so it's better not to chmod at all. */
2402 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2403 chmod (XSTRING (encoded_newname
)->data
, st
.st_mode
& 07777);
2404 #endif /* DJGPP version 2 or newer */
2410 /* Discard the unwind protects. */
2411 specpdl_ptr
= specpdl
+ count
;
2417 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2418 Smake_directory_internal
, 1, 1, 0,
2419 "Create a new directory named DIRECTORY.")
2421 Lisp_Object directory
;
2424 Lisp_Object handler
;
2425 Lisp_Object encoded_dir
;
2427 CHECK_STRING (directory
, 0);
2428 directory
= Fexpand_file_name (directory
, Qnil
);
2430 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2431 if (!NILP (handler
))
2432 return call2 (handler
, Qmake_directory_internal
, directory
);
2434 encoded_dir
= ENCODE_FILE (directory
);
2436 dir
= XSTRING (encoded_dir
)->data
;
2439 if (mkdir (dir
) != 0)
2441 if (mkdir (dir
, 0777) != 0)
2443 report_file_error ("Creating directory", Flist (1, &directory
));
2448 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2449 "Delete the directory named DIRECTORY.")
2451 Lisp_Object directory
;
2454 Lisp_Object handler
;
2455 Lisp_Object encoded_dir
;
2457 CHECK_STRING (directory
, 0);
2458 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2460 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2461 if (!NILP (handler
))
2462 return call2 (handler
, Qdelete_directory
, directory
);
2464 encoded_dir
= ENCODE_FILE (directory
);
2466 dir
= XSTRING (encoded_dir
)->data
;
2468 if (rmdir (dir
) != 0)
2469 report_file_error ("Removing directory", Flist (1, &directory
));
2474 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2475 "Delete file named FILENAME.\n\
2476 If file has multiple names, it continues to exist with the other names.")
2478 Lisp_Object filename
;
2480 Lisp_Object handler
;
2481 Lisp_Object encoded_file
;
2483 CHECK_STRING (filename
, 0);
2484 filename
= Fexpand_file_name (filename
, Qnil
);
2486 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2487 if (!NILP (handler
))
2488 return call2 (handler
, Qdelete_file
, filename
);
2490 encoded_file
= ENCODE_FILE (filename
);
2492 if (0 > unlink (XSTRING (encoded_file
)->data
))
2493 report_file_error ("Removing old name", Flist (1, &filename
));
2498 internal_delete_file_1 (ignore
)
2504 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2507 internal_delete_file (filename
)
2508 Lisp_Object filename
;
2510 return NILP (internal_condition_case_1 (Fdelete_file
, filename
,
2511 Qt
, internal_delete_file_1
));
2514 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2515 "fRename file: \nFRename %s to file: \np",
2516 "Rename FILE as NEWNAME. Both args strings.\n\
2517 If file has names other than FILE, it continues to have those names.\n\
2518 Signals a `file-already-exists' error if a file NEWNAME already exists\n\
2519 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
2520 A number as third arg means request confirmation if NEWNAME already exists.\n\
2521 This is what happens in interactive use with M-x.")
2522 (file
, newname
, ok_if_already_exists
)
2523 Lisp_Object file
, newname
, ok_if_already_exists
;
2526 Lisp_Object args
[2];
2528 Lisp_Object handler
;
2529 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2530 Lisp_Object encoded_file
, encoded_newname
;
2532 encoded_file
= encoded_newname
= Qnil
;
2533 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2534 CHECK_STRING (file
, 0);
2535 CHECK_STRING (newname
, 1);
2536 file
= Fexpand_file_name (file
, Qnil
);
2537 newname
= Fexpand_file_name (newname
, Qnil
);
2539 /* If the file name has special constructs in it,
2540 call the corresponding file handler. */
2541 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2543 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2544 if (!NILP (handler
))
2545 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2546 file
, newname
, ok_if_already_exists
));
2548 encoded_file
= ENCODE_FILE (file
);
2549 encoded_newname
= ENCODE_FILE (newname
);
2552 /* If the file names are identical but for the case, don't ask for
2553 confirmation: they simply want to change the letter-case of the
2555 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2557 if (NILP (ok_if_already_exists
)
2558 || INTEGERP (ok_if_already_exists
))
2559 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2560 INTEGERP (ok_if_already_exists
), 0, 0);
2562 if (0 > rename (XSTRING (encoded_file
)->data
, XSTRING (encoded_newname
)->data
))
2564 if (0 > link (XSTRING (encoded_file
)->data
, XSTRING (encoded_newname
)->data
)
2565 || 0 > unlink (XSTRING (encoded_file
)->data
))
2570 Fcopy_file (file
, newname
,
2571 /* We have already prompted if it was an integer,
2572 so don't have copy-file prompt again. */
2573 NILP (ok_if_already_exists
) ? Qnil
: Qt
, Qt
);
2574 Fdelete_file (file
);
2581 report_file_error ("Renaming", Flist (2, args
));
2584 report_file_error ("Renaming", Flist (2, &file
));
2591 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2592 "fAdd name to file: \nFName to add to %s: \np",
2593 "Give FILE additional name NEWNAME. Both args strings.\n\
2594 Signals a `file-already-exists' error if a file NEWNAME already exists\n\
2595 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
2596 A number as third arg means request confirmation if NEWNAME already exists.\n\
2597 This is what happens in interactive use with M-x.")
2598 (file
, newname
, ok_if_already_exists
)
2599 Lisp_Object file
, newname
, ok_if_already_exists
;
2602 Lisp_Object args
[2];
2604 Lisp_Object handler
;
2605 Lisp_Object encoded_file
, encoded_newname
;
2606 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2608 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2609 encoded_file
= encoded_newname
= Qnil
;
2610 CHECK_STRING (file
, 0);
2611 CHECK_STRING (newname
, 1);
2612 file
= Fexpand_file_name (file
, Qnil
);
2613 newname
= Fexpand_file_name (newname
, Qnil
);
2615 /* If the file name has special constructs in it,
2616 call the corresponding file handler. */
2617 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2618 if (!NILP (handler
))
2619 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2620 newname
, ok_if_already_exists
));
2622 /* If the new name has special constructs in it,
2623 call the corresponding file handler. */
2624 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2625 if (!NILP (handler
))
2626 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2627 newname
, ok_if_already_exists
));
2629 encoded_file
= ENCODE_FILE (file
);
2630 encoded_newname
= ENCODE_FILE (newname
);
2632 if (NILP (ok_if_already_exists
)
2633 || INTEGERP (ok_if_already_exists
))
2634 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2635 INTEGERP (ok_if_already_exists
), 0, 0);
2637 unlink (XSTRING (newname
)->data
);
2638 if (0 > link (XSTRING (encoded_file
)->data
, XSTRING (encoded_newname
)->data
))
2643 report_file_error ("Adding new name", Flist (2, args
));
2645 report_file_error ("Adding new name", Flist (2, &file
));
2654 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2655 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np",
2656 "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\
2657 Signals a `file-already-exists' error if a file LINKNAME already exists\n\
2658 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\
2659 A number as third arg means request confirmation if LINKNAME already exists.\n\
2660 This happens for interactive use with M-x.")
2661 (filename
, linkname
, ok_if_already_exists
)
2662 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2665 Lisp_Object args
[2];
2667 Lisp_Object handler
;
2668 Lisp_Object encoded_filename
, encoded_linkname
;
2669 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2671 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2672 encoded_filename
= encoded_linkname
= Qnil
;
2673 CHECK_STRING (filename
, 0);
2674 CHECK_STRING (linkname
, 1);
2675 /* If the link target has a ~, we must expand it to get
2676 a truly valid file name. Otherwise, do not expand;
2677 we want to permit links to relative file names. */
2678 if (XSTRING (filename
)->data
[0] == '~')
2679 filename
= Fexpand_file_name (filename
, Qnil
);
2680 linkname
= Fexpand_file_name (linkname
, Qnil
);
2682 /* If the file name has special constructs in it,
2683 call the corresponding file handler. */
2684 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2685 if (!NILP (handler
))
2686 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2687 linkname
, ok_if_already_exists
));
2689 /* If the new link name has special constructs in it,
2690 call the corresponding file handler. */
2691 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2692 if (!NILP (handler
))
2693 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2694 linkname
, ok_if_already_exists
));
2696 encoded_filename
= ENCODE_FILE (filename
);
2697 encoded_linkname
= ENCODE_FILE (linkname
);
2699 if (NILP (ok_if_already_exists
)
2700 || INTEGERP (ok_if_already_exists
))
2701 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2702 INTEGERP (ok_if_already_exists
), 0, 0);
2703 if (0 > symlink (XSTRING (encoded_filename
)->data
,
2704 XSTRING (encoded_linkname
)->data
))
2706 /* If we didn't complain already, silently delete existing file. */
2707 if (errno
== EEXIST
)
2709 unlink (XSTRING (encoded_linkname
)->data
);
2710 if (0 <= symlink (XSTRING (encoded_filename
)->data
,
2711 XSTRING (encoded_linkname
)->data
))
2721 report_file_error ("Making symbolic link", Flist (2, args
));
2723 report_file_error ("Making symbolic link", Flist (2, &filename
));
2729 #endif /* S_IFLNK */
2733 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2734 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2735 "Define the job-wide logical name NAME to have the value STRING.\n\
2736 If STRING is nil or a null string, the logical name NAME is deleted.")
2741 CHECK_STRING (name
, 0);
2743 delete_logical_name (XSTRING (name
)->data
);
2746 CHECK_STRING (string
, 1);
2748 if (XSTRING (string
)->size
== 0)
2749 delete_logical_name (XSTRING (name
)->data
);
2751 define_logical_name (XSTRING (name
)->data
, XSTRING (string
)->data
);
2760 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
2761 "Open a network connection to PATH using LOGIN as the login string.")
2763 Lisp_Object path
, login
;
2767 CHECK_STRING (path
, 0);
2768 CHECK_STRING (login
, 0);
2770 netresult
= netunam (XSTRING (path
)->data
, XSTRING (login
)->data
);
2772 if (netresult
== -1)
2777 #endif /* HPUX_NET */
2779 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2781 "Return t if file FILENAME specifies an absolute file name.\n\
2782 On Unix, this is a name starting with a `/' or a `~'.")
2784 Lisp_Object filename
;
2788 CHECK_STRING (filename
, 0);
2789 ptr
= XSTRING (filename
)->data
;
2790 if (IS_DIRECTORY_SEP (*ptr
) || *ptr
== '~'
2792 /* ??? This criterion is probably wrong for '<'. */
2793 || index (ptr
, ':') || index (ptr
, '<')
2794 || (*ptr
== '[' && (ptr
[1] != '-' || (ptr
[2] != '.' && ptr
[2] != ']'))
2798 || (IS_DRIVE (*ptr
) && ptr
[1] == ':' && IS_DIRECTORY_SEP (ptr
[2]))
2806 /* Return nonzero if file FILENAME exists and can be executed. */
2809 check_executable (filename
)
2813 int len
= strlen (filename
);
2816 if (stat (filename
, &st
) < 0)
2818 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
2819 return ((st
.st_mode
& S_IEXEC
) != 0);
2821 return (S_ISREG (st
.st_mode
)
2823 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
2824 || stricmp (suffix
, ".exe") == 0
2825 || stricmp (suffix
, ".bat") == 0)
2826 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2827 #endif /* not WINDOWSNT */
2828 #else /* not DOS_NT */
2829 #ifdef HAVE_EUIDACCESS
2830 return (euidaccess (filename
, 1) >= 0);
2832 /* Access isn't quite right because it uses the real uid
2833 and we really want to test with the effective uid.
2834 But Unix doesn't give us a right way to do it. */
2835 return (access (filename
, 1) >= 0);
2837 #endif /* not DOS_NT */
2840 /* Return nonzero if file FILENAME exists and can be written. */
2843 check_writable (filename
)
2848 if (stat (filename
, &st
) < 0)
2850 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2851 #else /* not MSDOS */
2852 #ifdef HAVE_EUIDACCESS
2853 return (euidaccess (filename
, 2) >= 0);
2855 /* Access isn't quite right because it uses the real uid
2856 and we really want to test with the effective uid.
2857 But Unix doesn't give us a right way to do it.
2858 Opening with O_WRONLY could work for an ordinary file,
2859 but would lose for directories. */
2860 return (access (filename
, 2) >= 0);
2862 #endif /* not MSDOS */
2865 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
2866 "Return t if file FILENAME exists. (This does not mean you can read it.)\n\
2867 See also `file-readable-p' and `file-attributes'.")
2869 Lisp_Object filename
;
2871 Lisp_Object absname
;
2872 Lisp_Object handler
;
2873 struct stat statbuf
;
2875 CHECK_STRING (filename
, 0);
2876 absname
= Fexpand_file_name (filename
, Qnil
);
2878 /* If the file name has special constructs in it,
2879 call the corresponding file handler. */
2880 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
2881 if (!NILP (handler
))
2882 return call2 (handler
, Qfile_exists_p
, absname
);
2884 absname
= ENCODE_FILE (absname
);
2886 return (stat (XSTRING (absname
)->data
, &statbuf
) >= 0) ? Qt
: Qnil
;
2889 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
2890 "Return t if FILENAME can be executed by you.\n\
2891 For a directory, this means you can access files in that directory.")
2893 Lisp_Object filename
;
2896 Lisp_Object absname
;
2897 Lisp_Object handler
;
2899 CHECK_STRING (filename
, 0);
2900 absname
= Fexpand_file_name (filename
, Qnil
);
2902 /* If the file name has special constructs in it,
2903 call the corresponding file handler. */
2904 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
2905 if (!NILP (handler
))
2906 return call2 (handler
, Qfile_executable_p
, absname
);
2908 absname
= ENCODE_FILE (absname
);
2910 return (check_executable (XSTRING (absname
)->data
) ? Qt
: Qnil
);
2913 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
2914 "Return t if file FILENAME exists and you can read it.\n\
2915 See also `file-exists-p' and `file-attributes'.")
2917 Lisp_Object filename
;
2919 Lisp_Object absname
;
2920 Lisp_Object handler
;
2923 struct stat statbuf
;
2925 CHECK_STRING (filename
, 0);
2926 absname
= Fexpand_file_name (filename
, Qnil
);
2928 /* If the file name has special constructs in it,
2929 call the corresponding file handler. */
2930 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
2931 if (!NILP (handler
))
2932 return call2 (handler
, Qfile_readable_p
, absname
);
2934 absname
= ENCODE_FILE (absname
);
2937 /* Under MS-DOS and Windows, open does not work for directories. */
2938 if (access (XSTRING (absname
)->data
, 0) == 0)
2941 #else /* not DOS_NT */
2943 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
2944 /* Opening a fifo without O_NONBLOCK can wait.
2945 We don't want to wait. But we don't want to mess wth O_NONBLOCK
2946 except in the case of a fifo, on a system which handles it. */
2947 desc
= stat (XSTRING (absname
)->data
, &statbuf
);
2950 if (S_ISFIFO (statbuf
.st_mode
))
2951 flags
|= O_NONBLOCK
;
2953 desc
= emacs_open (XSTRING (absname
)->data
, flags
, 0);
2958 #endif /* not DOS_NT */
2961 /* Having this before file-symlink-p mysteriously caused it to be forgotten
2963 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
2964 "Return t if file FILENAME can be written or created by you.")
2966 Lisp_Object filename
;
2968 Lisp_Object absname
, dir
, encoded
;
2969 Lisp_Object handler
;
2970 struct stat statbuf
;
2972 CHECK_STRING (filename
, 0);
2973 absname
= Fexpand_file_name (filename
, Qnil
);
2975 /* If the file name has special constructs in it,
2976 call the corresponding file handler. */
2977 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
2978 if (!NILP (handler
))
2979 return call2 (handler
, Qfile_writable_p
, absname
);
2981 encoded
= ENCODE_FILE (absname
);
2982 if (stat (XSTRING (encoded
)->data
, &statbuf
) >= 0)
2983 return (check_writable (XSTRING (encoded
)->data
)
2986 dir
= Ffile_name_directory (absname
);
2989 dir
= Fdirectory_file_name (dir
);
2993 dir
= Fdirectory_file_name (dir
);
2996 dir
= ENCODE_FILE (dir
);
2998 /* The read-only attribute of the parent directory doesn't affect
2999 whether a file or directory can be created within it. Some day we
3000 should check ACLs though, which do affect this. */
3001 if (stat (XSTRING (dir
)->data
, &statbuf
) < 0)
3003 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3005 return (check_writable (!NILP (dir
) ? (char *) XSTRING (dir
)->data
: "")
3010 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3011 "Access file FILENAME, and get an error if that does not work.\n\
3012 The second argument STRING is used in the error message.\n\
3013 If there is no error, we return nil.")
3015 Lisp_Object filename
, string
;
3017 Lisp_Object handler
, encoded_filename
;
3020 CHECK_STRING (filename
, 0);
3021 CHECK_STRING (string
, 1);
3023 /* If the file name has special constructs in it,
3024 call the corresponding file handler. */
3025 handler
= Ffind_file_name_handler (filename
, Qaccess_file
);
3026 if (!NILP (handler
))
3027 return call3 (handler
, Qaccess_file
, filename
, string
);
3029 encoded_filename
= ENCODE_FILE (filename
);
3031 fd
= emacs_open (XSTRING (encoded_filename
)->data
, O_RDONLY
, 0);
3033 report_file_error (XSTRING (string
)->data
, Fcons (filename
, Qnil
));
3039 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3040 "Return non-nil if file FILENAME is the name of a symbolic link.\n\
3041 The value is the name of the file to which it is linked.\n\
3042 Otherwise returns nil.")
3044 Lisp_Object filename
;
3051 Lisp_Object handler
;
3053 CHECK_STRING (filename
, 0);
3054 filename
= Fexpand_file_name (filename
, Qnil
);
3056 /* If the file name has special constructs in it,
3057 call the corresponding file handler. */
3058 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3059 if (!NILP (handler
))
3060 return call2 (handler
, Qfile_symlink_p
, filename
);
3062 filename
= ENCODE_FILE (filename
);
3067 buf
= (char *) xmalloc (bufsize
);
3068 bzero (buf
, bufsize
);
3069 valsize
= readlink (XSTRING (filename
)->data
, buf
, bufsize
);
3070 if (valsize
< bufsize
) break;
3071 /* Buffer was not long enough */
3080 val
= make_string (buf
, valsize
);
3081 if (buf
[0] == '/' && index (buf
, ':'))
3082 val
= concat2 (build_string ("/:"), val
);
3084 val
= DECODE_FILE (val
);
3086 #else /* not S_IFLNK */
3088 #endif /* not S_IFLNK */
3091 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3092 "Return t if FILENAME names an existing directory.\n\
3093 Symbolic links to directories count as directories.\n\
3094 See `file-symlink-p' to distinguish symlinks.")
3096 Lisp_Object filename
;
3098 register Lisp_Object absname
;
3100 Lisp_Object handler
;
3102 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3104 /* If the file name has special constructs in it,
3105 call the corresponding file handler. */
3106 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3107 if (!NILP (handler
))
3108 return call2 (handler
, Qfile_directory_p
, absname
);
3110 absname
= ENCODE_FILE (absname
);
3112 if (stat (XSTRING (absname
)->data
, &st
) < 0)
3114 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3117 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3118 "Return t if file FILENAME is the name of a directory as a file,\n\
3119 and files in that directory can be opened by you. In order to use a\n\
3120 directory as a buffer's current directory, this predicate must return true.\n\
3121 A directory name spec may be given instead; then the value is t\n\
3122 if the directory so specified exists and really is a readable and\n\
3123 searchable directory.")
3125 Lisp_Object filename
;
3127 Lisp_Object handler
;
3129 struct gcpro gcpro1
;
3131 /* If the file name has special constructs in it,
3132 call the corresponding file handler. */
3133 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3134 if (!NILP (handler
))
3135 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3137 /* It's an unlikely combination, but yes we really do need to gcpro:
3138 Suppose that file-accessible-directory-p has no handler, but
3139 file-directory-p does have a handler; this handler causes a GC which
3140 relocates the string in `filename'; and finally file-directory-p
3141 returns non-nil. Then we would end up passing a garbaged string
3142 to file-executable-p. */
3144 tem
= (NILP (Ffile_directory_p (filename
))
3145 || NILP (Ffile_executable_p (filename
)));
3147 return tem
? Qnil
: Qt
;
3150 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3151 "Return t if file FILENAME is the name of a regular file.\n\
3152 This is the sort of file that holds an ordinary stream of data bytes.")
3154 Lisp_Object filename
;
3156 register Lisp_Object absname
;
3158 Lisp_Object handler
;
3160 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3162 /* If the file name has special constructs in it,
3163 call the corresponding file handler. */
3164 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3165 if (!NILP (handler
))
3166 return call2 (handler
, Qfile_regular_p
, absname
);
3168 absname
= ENCODE_FILE (absname
);
3173 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3175 /* Tell stat to use expensive method to get accurate info. */
3176 Vw32_get_true_file_attributes
= Qt
;
3177 result
= stat (XSTRING (absname
)->data
, &st
);
3178 Vw32_get_true_file_attributes
= tem
;
3182 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3185 if (stat (XSTRING (absname
)->data
, &st
) < 0)
3187 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3191 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3192 "Return mode bits of file named FILENAME, as an integer.")
3194 Lisp_Object filename
;
3196 Lisp_Object absname
;
3198 Lisp_Object handler
;
3200 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3202 /* If the file name has special constructs in it,
3203 call the corresponding file handler. */
3204 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3205 if (!NILP (handler
))
3206 return call2 (handler
, Qfile_modes
, absname
);
3208 absname
= ENCODE_FILE (absname
);
3210 if (stat (XSTRING (absname
)->data
, &st
) < 0)
3212 #if defined (MSDOS) && __DJGPP__ < 2
3213 if (check_executable (XSTRING (absname
)->data
))
3214 st
.st_mode
|= S_IEXEC
;
3215 #endif /* MSDOS && __DJGPP__ < 2 */
3217 return make_number (st
.st_mode
& 07777);
3220 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3221 "Set mode bits of file named FILENAME to MODE (an integer).\n\
3222 Only the 12 low bits of MODE are used.")
3224 Lisp_Object filename
, mode
;
3226 Lisp_Object absname
, encoded_absname
;
3227 Lisp_Object handler
;
3229 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3230 CHECK_NUMBER (mode
, 1);
3232 /* If the file name has special constructs in it,
3233 call the corresponding file handler. */
3234 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3235 if (!NILP (handler
))
3236 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3238 encoded_absname
= ENCODE_FILE (absname
);
3240 if (chmod (XSTRING (encoded_absname
)->data
, XINT (mode
)) < 0)
3241 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3246 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3247 "Set the file permission bits for newly created files.\n\
3248 The argument MODE should be an integer; only the low 9 bits are used.\n\
3249 This setting is inherited by subprocesses.")
3253 CHECK_NUMBER (mode
, 0);
3255 umask ((~ XINT (mode
)) & 0777);
3260 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3261 "Return the default file protection for created files.\n\
3262 The value is an integer.")
3268 realmask
= umask (0);
3271 XSETINT (value
, (~ realmask
) & 0777);
3281 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3282 "Tell Unix to finish all pending disk updates.")
3291 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3292 "Return t if file FILE1 is newer than file FILE2.\n\
3293 If FILE1 does not exist, the answer is nil;\n\
3294 otherwise, if FILE2 does not exist, the answer is t.")
3296 Lisp_Object file1
, file2
;
3298 Lisp_Object absname1
, absname2
;
3301 Lisp_Object handler
;
3302 struct gcpro gcpro1
, gcpro2
;
3304 CHECK_STRING (file1
, 0);
3305 CHECK_STRING (file2
, 0);
3308 GCPRO2 (absname1
, file2
);
3309 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3310 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3313 /* If the file name has special constructs in it,
3314 call the corresponding file handler. */
3315 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3317 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3318 if (!NILP (handler
))
3319 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3321 GCPRO2 (absname1
, absname2
);
3322 absname1
= ENCODE_FILE (absname1
);
3323 absname2
= ENCODE_FILE (absname2
);
3326 if (stat (XSTRING (absname1
)->data
, &st
) < 0)
3329 mtime1
= st
.st_mtime
;
3331 if (stat (XSTRING (absname2
)->data
, &st
) < 0)
3334 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3338 Lisp_Object Qfind_buffer_file_type
;
3341 #ifndef READ_BUF_SIZE
3342 #define READ_BUF_SIZE (64 << 10)
3345 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3347 /* This function is called after Lisp functions to decide a coding
3348 system are called, or when they cause an error. Before they are
3349 called, the current buffer is set unibyte and it contains only a
3350 newly inserted text (thus the buffer was empty before the
3353 The functions may set markers, overlays, text properties, or even
3354 alter the buffer contents, change the current buffer.
3356 Here, we reset all those changes by:
3357 o set back the current buffer.
3358 o move all markers and overlays to BEG.
3359 o remove all text properties.
3360 o set back the buffer multibyteness. */
3363 decide_coding_unwind (unwind_data
)
3364 Lisp_Object unwind_data
;
3366 Lisp_Object multibyte
, undo_list
, buffer
;
3368 multibyte
= XCAR (unwind_data
);
3369 unwind_data
= XCDR (unwind_data
);
3370 undo_list
= XCAR (unwind_data
);
3371 buffer
= XCDR (unwind_data
);
3373 if (current_buffer
!= XBUFFER (buffer
))
3374 set_buffer_internal (XBUFFER (buffer
));
3375 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3376 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3377 BUF_INTERVALS (current_buffer
) = 0;
3378 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3380 /* Now we are safe to change the buffer's multibyteness directly. */
3381 current_buffer
->enable_multibyte_characters
= multibyte
;
3382 current_buffer
->undo_list
= undo_list
;
3387 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3389 "Insert contents of file FILENAME after point.\n\
3390 Returns list of absolute file name and number of bytes inserted.\n\
3391 If second argument VISIT is non-nil, the buffer's visited filename\n\
3392 and last save file modtime are set, and it is marked unmodified.\n\
3393 If visiting and the file does not exist, visiting is completed\n\
3394 before the error is signaled.\n\
3395 The optional third and fourth arguments BEG and END\n\
3396 specify what portion of the file to insert.\n\
3397 These arguments count bytes in the file, not characters in the buffer.\n\
3398 If VISIT is non-nil, BEG and END must be nil.\n\
3400 If optional fifth argument REPLACE is non-nil,\n\
3401 it means replace the current buffer contents (in the accessible portion)\n\
3402 with the file contents. This is better than simply deleting and inserting\n\
3403 the whole thing because (1) it preserves some marker positions\n\
3404 and (2) it puts less data in the undo list.\n\
3405 When REPLACE is non-nil, the value is the number of characters actually read,\n\
3406 which is often less than the number of characters to be read.\n\
3408 This does code conversion according to the value of\n\
3409 `coding-system-for-read' or `file-coding-system-alist',\n\
3410 and sets the variable `last-coding-system-used' to the coding system\n\
3412 (filename
, visit
, beg
, end
, replace
)
3413 Lisp_Object filename
, visit
, beg
, end
, replace
;
3418 register int how_much
;
3419 register int unprocessed
;
3420 int count
= specpdl_ptr
- specpdl
;
3421 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3422 Lisp_Object handler
, val
, insval
, orig_filename
;
3425 int not_regular
= 0;
3426 unsigned char read_buf
[READ_BUF_SIZE
];
3427 struct coding_system coding
;
3428 unsigned char buffer
[1 << 14];
3429 int replace_handled
= 0;
3430 int set_coding_system
= 0;
3431 int coding_system_decided
= 0;
3433 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3434 error ("Cannot do file visiting in an indirect buffer");
3436 if (!NILP (current_buffer
->read_only
))
3437 Fbarf_if_buffer_read_only ();
3441 orig_filename
= Qnil
;
3443 GCPRO4 (filename
, val
, p
, orig_filename
);
3445 CHECK_STRING (filename
, 0);
3446 filename
= Fexpand_file_name (filename
, Qnil
);
3448 /* If the file name has special constructs in it,
3449 call the corresponding file handler. */
3450 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3451 if (!NILP (handler
))
3453 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3454 visit
, beg
, end
, replace
);
3455 if (CONSP (val
) && CONSP (XCDR (val
)))
3456 inserted
= XINT (XCAR (XCDR (val
)));
3460 orig_filename
= filename
;
3461 filename
= ENCODE_FILE (filename
);
3467 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3469 /* Tell stat to use expensive method to get accurate info. */
3470 Vw32_get_true_file_attributes
= Qt
;
3471 total
= stat (XSTRING (filename
)->data
, &st
);
3472 Vw32_get_true_file_attributes
= tem
;
3477 if (stat (XSTRING (filename
)->data
, &st
) < 0)
3479 if ((fd
= emacs_open (XSTRING (filename
)->data
, O_RDONLY
, 0)) < 0
3480 || fstat (fd
, &st
) < 0)
3481 #endif /* not APOLLO */
3482 #endif /* WINDOWSNT */
3484 if (fd
>= 0) emacs_close (fd
);
3487 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3490 if (!NILP (Vcoding_system_for_read
))
3491 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3496 /* This code will need to be changed in order to work on named
3497 pipes, and it's probably just not worth it. So we should at
3498 least signal an error. */
3499 if (!S_ISREG (st
.st_mode
))
3506 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3507 Fsignal (Qfile_error
,
3508 Fcons (build_string ("not a regular file"),
3509 Fcons (orig_filename
, Qnil
)));
3514 if ((fd
= emacs_open (XSTRING (filename
)->data
, O_RDONLY
, 0)) < 0)
3517 /* Replacement should preserve point as it preserves markers. */
3518 if (!NILP (replace
))
3519 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3521 record_unwind_protect (close_file_unwind
, make_number (fd
));
3523 /* Supposedly happens on VMS. */
3524 if (! not_regular
&& st
.st_size
< 0)
3525 error ("File size is negative");
3527 /* Prevent redisplay optimizations. */
3528 current_buffer
->clip_changed
= 1;
3532 if (!NILP (beg
) || !NILP (end
))
3533 error ("Attempt to visit less than an entire file");
3534 if (BEG
< Z
&& NILP (replace
))
3535 error ("Cannot do file visiting in a non-empty buffer");
3539 CHECK_NUMBER (beg
, 0);
3541 XSETFASTINT (beg
, 0);
3544 CHECK_NUMBER (end
, 0);
3549 XSETINT (end
, st
.st_size
);
3551 /* Arithmetic overflow can occur if an Emacs integer cannot
3552 represent the file size, or if the calculations below
3553 overflow. The calculations below double the file size
3554 twice, so check that it can be multiplied by 4 safely. */
3555 if (XINT (end
) != st
.st_size
3556 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3557 error ("Maximum buffer size exceeded");
3563 /* Decide the coding system to use for reading the file now
3564 because we can't use an optimized method for handling
3565 `coding:' tag if the current buffer is not empty. */
3569 if (!NILP (Vcoding_system_for_read
))
3570 val
= Vcoding_system_for_read
;
3571 else if (! NILP (replace
))
3572 /* In REPLACE mode, we can use the same coding system
3573 that was used to visit the file. */
3574 val
= current_buffer
->buffer_file_coding_system
;
3577 /* Don't try looking inside a file for a coding system
3578 specification if it is not seekable. */
3579 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3581 /* Find a coding system specified in the heading two
3582 lines or in the tailing several lines of the file.
3583 We assume that the 1K-byte and 3K-byte for heading
3584 and tailing respectively are sufficient for this
3588 if (st
.st_size
<= (1024 * 4))
3589 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3592 nread
= emacs_read (fd
, read_buf
, 1024);
3595 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3596 report_file_error ("Setting file position",
3597 Fcons (orig_filename
, Qnil
));
3598 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3603 error ("IO error reading %s: %s",
3604 XSTRING (orig_filename
)->data
, emacs_strerror (errno
));
3607 struct buffer
*prev
= current_buffer
;
3610 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3612 /* The call to temp_output_buffer_setup binds
3614 count1
= specpdl_ptr
- specpdl
;
3615 temp_output_buffer_setup (" *code-converting-work*");
3617 set_buffer_internal (XBUFFER (Vstandard_output
));
3618 current_buffer
->enable_multibyte_characters
= Qnil
;
3619 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3620 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3621 val
= call2 (Vset_auto_coding_function
,
3622 filename
, make_number (nread
));
3623 set_buffer_internal (prev
);
3625 /* Remove the binding for standard-output. */
3626 unbind_to (count1
, Qnil
);
3628 /* Discard the unwind protect for recovering the
3632 /* Rewind the file for the actual read done later. */
3633 if (lseek (fd
, 0, 0) < 0)
3634 report_file_error ("Setting file position",
3635 Fcons (orig_filename
, Qnil
));
3641 /* If we have not yet decided a coding system, check
3642 file-coding-system-alist. */
3643 Lisp_Object args
[6], coding_systems
;
3645 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3646 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3647 coding_systems
= Ffind_operation_coding_system (6, args
);
3648 if (CONSP (coding_systems
))
3649 val
= XCAR (coding_systems
);
3653 setup_coding_system (Fcheck_coding_system (val
), &coding
);
3654 /* Ensure we set Vlast_coding_system_used. */
3655 set_coding_system
= 1;
3657 if (NILP (current_buffer
->enable_multibyte_characters
)
3659 /* We must suppress all character code conversion except for
3660 end-of-line conversion. */
3661 setup_raw_text_coding_system (&coding
);
3663 coding
.src_multibyte
= 0;
3664 coding
.dst_multibyte
3665 = !NILP (current_buffer
->enable_multibyte_characters
);
3666 coding_system_decided
= 1;
3669 /* If requested, replace the accessible part of the buffer
3670 with the file contents. Avoid replacing text at the
3671 beginning or end of the buffer that matches the file contents;
3672 that preserves markers pointing to the unchanged parts.
3674 Here we implement this feature in an optimized way
3675 for the case where code conversion is NOT needed.
3676 The following if-statement handles the case of conversion
3677 in a less optimal way.
3679 If the code conversion is "automatic" then we try using this
3680 method and hope for the best.
3681 But if we discover the need for conversion, we give up on this method
3682 and let the following if-statement handle the replace job. */
3685 && !(coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
))
3687 /* same_at_start and same_at_end count bytes,
3688 because file access counts bytes
3689 and BEG and END count bytes. */
3690 int same_at_start
= BEGV_BYTE
;
3691 int same_at_end
= ZV_BYTE
;
3693 /* There is still a possibility we will find the need to do code
3694 conversion. If that happens, we set this variable to 1 to
3695 give up on handling REPLACE in the optimized way. */
3696 int giveup_match_end
= 0;
3698 if (XINT (beg
) != 0)
3700 if (lseek (fd
, XINT (beg
), 0) < 0)
3701 report_file_error ("Setting file position",
3702 Fcons (orig_filename
, Qnil
));
3707 /* Count how many chars at the start of the file
3708 match the text at the beginning of the buffer. */
3713 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
3715 error ("IO error reading %s: %s",
3716 XSTRING (orig_filename
)->data
, emacs_strerror (errno
));
3717 else if (nread
== 0)
3720 if (coding
.type
== coding_type_undecided
)
3721 detect_coding (&coding
, buffer
, nread
);
3722 if (coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
)
3723 /* We found that the file should be decoded somehow.
3724 Let's give up here. */
3726 giveup_match_end
= 1;
3730 if (coding
.eol_type
== CODING_EOL_UNDECIDED
)
3731 detect_eol (&coding
, buffer
, nread
);
3732 if (coding
.eol_type
!= CODING_EOL_UNDECIDED
3733 && coding
.eol_type
!= CODING_EOL_LF
)
3734 /* We found that the format of eol should be decoded.
3735 Let's give up here. */
3737 giveup_match_end
= 1;
3742 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
3743 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
3744 same_at_start
++, bufpos
++;
3745 /* If we found a discrepancy, stop the scan.
3746 Otherwise loop around and scan the next bufferful. */
3747 if (bufpos
!= nread
)
3751 /* If the file matches the buffer completely,
3752 there's no need to replace anything. */
3753 if (same_at_start
- BEGV_BYTE
== XINT (end
))
3757 /* Truncate the buffer to the size of the file. */
3758 del_range_1 (same_at_start
, same_at_end
, 0, 0);
3763 /* Count how many chars at the end of the file
3764 match the text at the end of the buffer. But, if we have
3765 already found that decoding is necessary, don't waste time. */
3766 while (!giveup_match_end
)
3768 int total_read
, nread
, bufpos
, curpos
, trial
;
3770 /* At what file position are we now scanning? */
3771 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
3772 /* If the entire file matches the buffer tail, stop the scan. */
3775 /* How much can we scan in the next step? */
3776 trial
= min (curpos
, sizeof buffer
);
3777 if (lseek (fd
, curpos
- trial
, 0) < 0)
3778 report_file_error ("Setting file position",
3779 Fcons (orig_filename
, Qnil
));
3782 while (total_read
< trial
)
3784 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
3786 error ("IO error reading %s: %s",
3787 XSTRING (orig_filename
)->data
, emacs_strerror (errno
));
3788 total_read
+= nread
;
3790 /* Scan this bufferful from the end, comparing with
3791 the Emacs buffer. */
3792 bufpos
= total_read
;
3793 /* Compare with same_at_start to avoid counting some buffer text
3794 as matching both at the file's beginning and at the end. */
3795 while (bufpos
> 0 && same_at_end
> same_at_start
3796 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
3797 same_at_end
--, bufpos
--;
3799 /* If we found a discrepancy, stop the scan.
3800 Otherwise loop around and scan the preceding bufferful. */
3803 /* If this discrepancy is because of code conversion,
3804 we cannot use this method; giveup and try the other. */
3805 if (same_at_end
> same_at_start
3806 && FETCH_BYTE (same_at_end
- 1) >= 0200
3807 && ! NILP (current_buffer
->enable_multibyte_characters
)
3808 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
3809 giveup_match_end
= 1;
3815 if (! giveup_match_end
)
3819 /* We win! We can handle REPLACE the optimized way. */
3821 /* Extend the start of non-matching text area to multibyte
3822 character boundary. */
3823 if (! NILP (current_buffer
->enable_multibyte_characters
))
3824 while (same_at_start
> BEGV_BYTE
3825 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3828 /* Extend the end of non-matching text area to multibyte
3829 character boundary. */
3830 if (! NILP (current_buffer
->enable_multibyte_characters
))
3831 while (same_at_end
< ZV_BYTE
3832 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
3835 /* Don't try to reuse the same piece of text twice. */
3836 overlap
= (same_at_start
- BEGV_BYTE
3837 - (same_at_end
+ st
.st_size
- ZV
));
3839 same_at_end
+= overlap
;
3841 /* Arrange to read only the nonmatching middle part of the file. */
3842 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
3843 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
3845 del_range_byte (same_at_start
, same_at_end
, 0);
3846 /* Insert from the file at the proper position. */
3847 temp
= BYTE_TO_CHAR (same_at_start
);
3848 SET_PT_BOTH (temp
, same_at_start
);
3850 /* If display currently starts at beginning of line,
3851 keep it that way. */
3852 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
3853 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
3855 replace_handled
= 1;
3859 /* If requested, replace the accessible part of the buffer
3860 with the file contents. Avoid replacing text at the
3861 beginning or end of the buffer that matches the file contents;
3862 that preserves markers pointing to the unchanged parts.
3864 Here we implement this feature for the case where code conversion
3865 is needed, in a simple way that needs a lot of memory.
3866 The preceding if-statement handles the case of no conversion
3867 in a more optimized way. */
3868 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
3870 int same_at_start
= BEGV_BYTE
;
3871 int same_at_end
= ZV_BYTE
;
3874 /* Make sure that the gap is large enough. */
3875 int bufsize
= 2 * st
.st_size
;
3876 unsigned char *conversion_buffer
= (unsigned char *) xmalloc (bufsize
);
3879 /* First read the whole file, performing code conversion into
3880 CONVERSION_BUFFER. */
3882 if (lseek (fd
, XINT (beg
), 0) < 0)
3884 xfree (conversion_buffer
);
3885 report_file_error ("Setting file position",
3886 Fcons (orig_filename
, Qnil
));
3889 total
= st
.st_size
; /* Total bytes in the file. */
3890 how_much
= 0; /* Bytes read from file so far. */
3891 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
3892 unprocessed
= 0; /* Bytes not processed in previous loop. */
3894 while (how_much
< total
)
3896 /* try is reserved in some compilers (Microsoft C) */
3897 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
3898 unsigned char *destination
= read_buf
+ unprocessed
;
3901 /* Allow quitting out of the actual I/O. */
3904 this = emacs_read (fd
, destination
, trytry
);
3907 if (this < 0 || this + unprocessed
== 0)
3915 if (CODING_MAY_REQUIRE_DECODING (&coding
))
3917 int require
, result
;
3919 this += unprocessed
;
3921 /* If we are using more space than estimated,
3922 make CONVERSION_BUFFER bigger. */
3923 require
= decoding_buffer_size (&coding
, this);
3924 if (inserted
+ require
+ 2 * (total
- how_much
) > bufsize
)
3926 bufsize
= inserted
+ require
+ 2 * (total
- how_much
);
3927 conversion_buffer
= (unsigned char *) xrealloc (conversion_buffer
, bufsize
);
3930 /* Convert this batch with results in CONVERSION_BUFFER. */
3931 if (how_much
>= total
) /* This is the last block. */
3932 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
3933 result
= decode_coding (&coding
, read_buf
,
3934 conversion_buffer
+ inserted
,
3935 this, bufsize
- inserted
);
3937 /* Save for next iteration whatever we didn't convert. */
3938 unprocessed
= this - coding
.consumed
;
3939 bcopy (read_buf
+ coding
.consumed
, read_buf
, unprocessed
);
3940 if (!NILP (current_buffer
->enable_multibyte_characters
))
3941 this = coding
.produced
;
3943 this = str_as_unibyte (conversion_buffer
+ inserted
,
3950 /* At this point, INSERTED is how many characters (i.e. bytes)
3951 are present in CONVERSION_BUFFER.
3952 HOW_MUCH should equal TOTAL,
3953 or should be <= 0 if we couldn't read the file. */
3957 xfree (conversion_buffer
);
3960 error ("IO error reading %s: %s",
3961 XSTRING (orig_filename
)->data
, emacs_strerror (errno
));
3962 else if (how_much
== -2)
3963 error ("maximum buffer size exceeded");
3966 /* Compare the beginning of the converted file
3967 with the buffer text. */
3970 while (bufpos
< inserted
&& same_at_start
< same_at_end
3971 && FETCH_BYTE (same_at_start
) == conversion_buffer
[bufpos
])
3972 same_at_start
++, bufpos
++;
3974 /* If the file matches the buffer completely,
3975 there's no need to replace anything. */
3977 if (bufpos
== inserted
)
3979 xfree (conversion_buffer
);
3982 /* Truncate the buffer to the size of the file. */
3983 del_range_byte (same_at_start
, same_at_end
, 0);
3988 /* Extend the start of non-matching text area to multibyte
3989 character boundary. */
3990 if (! NILP (current_buffer
->enable_multibyte_characters
))
3991 while (same_at_start
> BEGV_BYTE
3992 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3995 /* Scan this bufferful from the end, comparing with
3996 the Emacs buffer. */
3999 /* Compare with same_at_start to avoid counting some buffer text
4000 as matching both at the file's beginning and at the end. */
4001 while (bufpos
> 0 && same_at_end
> same_at_start
4002 && FETCH_BYTE (same_at_end
- 1) == conversion_buffer
[bufpos
- 1])
4003 same_at_end
--, bufpos
--;
4005 /* Extend the end of non-matching text area to multibyte
4006 character boundary. */
4007 if (! NILP (current_buffer
->enable_multibyte_characters
))
4008 while (same_at_end
< ZV_BYTE
4009 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4012 /* Don't try to reuse the same piece of text twice. */
4013 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4015 same_at_end
+= overlap
;
4017 /* If display currently starts at beginning of line,
4018 keep it that way. */
4019 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4020 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4022 /* Replace the chars that we need to replace,
4023 and update INSERTED to equal the number of bytes
4024 we are taking from the file. */
4025 inserted
-= (Z_BYTE
- same_at_end
) + (same_at_start
- BEG_BYTE
);
4027 if (same_at_end
!= same_at_start
)
4029 del_range_byte (same_at_start
, same_at_end
, 0);
4031 same_at_start
= GPT_BYTE
;
4035 temp
= BYTE_TO_CHAR (same_at_start
);
4037 /* Insert from the file at the proper position. */
4038 SET_PT_BOTH (temp
, same_at_start
);
4039 insert_1 (conversion_buffer
+ same_at_start
- BEG_BYTE
, inserted
,
4041 /* Set `inserted' to the number of inserted characters. */
4042 inserted
= PT
- temp
;
4044 xfree (conversion_buffer
);
4053 register Lisp_Object temp
;
4055 total
= XINT (end
) - XINT (beg
);
4057 /* Make sure point-max won't overflow after this insertion. */
4058 XSETINT (temp
, total
);
4059 if (total
!= XINT (temp
))
4060 error ("Maximum buffer size exceeded");
4063 /* For a special file, all we can do is guess. */
4064 total
= READ_BUF_SIZE
;
4066 if (NILP (visit
) && total
> 0)
4067 prepare_to_modify_buffer (PT
, PT
, NULL
);
4070 if (GAP_SIZE
< total
)
4071 make_gap (total
- GAP_SIZE
);
4073 if (XINT (beg
) != 0 || !NILP (replace
))
4075 if (lseek (fd
, XINT (beg
), 0) < 0)
4076 report_file_error ("Setting file position",
4077 Fcons (orig_filename
, Qnil
));
4080 /* In the following loop, HOW_MUCH contains the total bytes read so
4081 far for a regular file, and not changed for a special file. But,
4082 before exiting the loop, it is set to a negative value if I/O
4085 /* Total bytes inserted. */
4087 /* Here, we don't do code conversion in the loop. It is done by
4088 code_convert_region after all data are read into the buffer. */
4089 while (how_much
< total
)
4091 /* try is reserved in some compilers (Microsoft C) */
4092 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4095 /* For a special file, GAP_SIZE should be checked every time. */
4096 if (not_regular
&& GAP_SIZE
< trytry
)
4097 make_gap (total
- GAP_SIZE
);
4099 /* Allow quitting out of the actual I/O. */
4102 this = emacs_read (fd
, BYTE_POS_ADDR (PT_BYTE
+ inserted
- 1) + 1,
4120 /* For a regular file, where TOTAL is the real size,
4121 count HOW_MUCH to compare with it.
4122 For a special file, where TOTAL is just a buffer size,
4123 so don't bother counting in HOW_MUCH.
4124 (INSERTED is where we count the number of characters inserted.) */
4131 /* Put an anchor to ensure multi-byte form ends at gap. */
4136 /* Discard the unwind protect for closing the file. */
4140 error ("IO error reading %s: %s",
4141 XSTRING (orig_filename
)->data
, emacs_strerror (errno
));
4145 if (! coding_system_decided
)
4147 /* The coding system is not yet decided. Decide it by an
4148 optimized method for handling `coding:' tag.
4150 Note that we can get here only if the buffer was empty
4151 before the insertion. */
4155 if (!NILP (Vcoding_system_for_read
))
4156 val
= Vcoding_system_for_read
;
4159 /* Since we are sure that the current buffer was empty
4160 before the insertion, we can toggle
4161 enable-multibyte-characters directly here without taking
4162 care of marker adjustment and byte combining problem. By
4163 this way, we can run Lisp program safely before decoding
4164 the inserted text. */
4165 Lisp_Object unwind_data
;
4166 int count
= specpdl_ptr
- specpdl
;
4168 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4169 Fcons (current_buffer
->undo_list
,
4170 Fcurrent_buffer ()));
4171 current_buffer
->enable_multibyte_characters
= Qnil
;
4172 current_buffer
->undo_list
= Qt
;
4173 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4175 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4177 val
= call2 (Vset_auto_coding_function
,
4178 filename
, make_number (inserted
));
4183 /* If the coding system is not yet decided, check
4184 file-coding-system-alist. */
4185 Lisp_Object args
[6], coding_systems
;
4187 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4188 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4189 coding_systems
= Ffind_operation_coding_system (6, args
);
4190 if (CONSP (coding_systems
))
4191 val
= XCAR (coding_systems
);
4194 unbind_to (count
, Qnil
);
4195 inserted
= Z_BYTE
- BEG_BYTE
;
4198 /* The following kludgy code is to avoid some compiler bug.
4200 setup_coding_system (val, &coding);
4203 struct coding_system temp_coding
;
4204 setup_coding_system (val
, &temp_coding
);
4205 bcopy (&temp_coding
, &coding
, sizeof coding
);
4207 /* Ensure we set Vlast_coding_system_used. */
4208 set_coding_system
= 1;
4210 if (NILP (current_buffer
->enable_multibyte_characters
)
4212 /* We must suppress all character code conversion except for
4213 end-of-line conversion. */
4214 setup_raw_text_coding_system (&coding
);
4215 coding
.src_multibyte
= 0;
4216 coding
.dst_multibyte
4217 = !NILP (current_buffer
->enable_multibyte_characters
);
4221 && (coding
.type
== coding_type_no_conversion
4222 || coding
.type
== coding_type_raw_text
))
4224 /* Visiting a file with these coding system always make the buffer
4226 current_buffer
->enable_multibyte_characters
= Qnil
;
4227 coding
.dst_multibyte
= 0;
4230 if (inserted
> 0 || coding
.type
== coding_type_ccl
)
4232 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4234 code_convert_region (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4236 inserted
= coding
.produced_char
;
4239 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4244 /* Use the conversion type to determine buffer-file-type
4245 (find-buffer-file-type is now used to help determine the
4247 if ((coding
.eol_type
== CODING_EOL_UNDECIDED
4248 || coding
.eol_type
== CODING_EOL_LF
)
4249 && ! CODING_REQUIRE_DECODING (&coding
))
4250 current_buffer
->buffer_file_type
= Qt
;
4252 current_buffer
->buffer_file_type
= Qnil
;
4259 if (!EQ (current_buffer
->undo_list
, Qt
))
4260 current_buffer
->undo_list
= Qnil
;
4262 stat (XSTRING (filename
)->data
, &st
);
4267 current_buffer
->modtime
= st
.st_mtime
;
4268 current_buffer
->filename
= orig_filename
;
4271 SAVE_MODIFF
= MODIFF
;
4272 current_buffer
->auto_save_modified
= MODIFF
;
4273 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4274 #ifdef CLASH_DETECTION
4277 if (!NILP (current_buffer
->file_truename
))
4278 unlock_file (current_buffer
->file_truename
);
4279 unlock_file (filename
);
4281 #endif /* CLASH_DETECTION */
4283 Fsignal (Qfile_error
,
4284 Fcons (build_string ("not a regular file"),
4285 Fcons (orig_filename
, Qnil
)));
4288 /* Decode file format */
4291 insval
= call3 (Qformat_decode
,
4292 Qnil
, make_number (inserted
), visit
);
4293 CHECK_NUMBER (insval
, 0);
4294 inserted
= XFASTINT (insval
);
4297 if (set_coding_system
)
4298 Vlast_coding_system_used
= coding
.symbol
;
4300 /* Call after-change hooks for the inserted text, aside from the case
4301 of normal visiting (not with REPLACE), which is done in a new buffer
4302 "before" the buffer is changed. */
4303 if (inserted
> 0 && total
> 0
4304 && (NILP (visit
) || !NILP (replace
)))
4306 signal_after_change (PT
, 0, inserted
);
4307 update_compositions (PT
, PT
, CHECK_BORDER
);
4310 p
= Vafter_insert_file_functions
;
4313 insval
= call1 (Fcar (p
), make_number (inserted
));
4316 CHECK_NUMBER (insval
, 0);
4317 inserted
= XFASTINT (insval
);
4324 && current_buffer
->modtime
== -1)
4326 /* If visiting nonexistent file, return nil. */
4327 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4330 /* ??? Retval needs to be dealt with in all cases consistently. */
4332 val
= Fcons (orig_filename
,
4333 Fcons (make_number (inserted
),
4336 RETURN_UNGCPRO (unbind_to (count
, val
));
4339 static Lisp_Object build_annotations
P_ ((Lisp_Object
, Lisp_Object
,
4342 /* If build_annotations switched buffers, switch back to BUF.
4343 Kill the temporary buffer that was selected in the meantime.
4345 Since this kill only the last temporary buffer, some buffers remain
4346 not killed if build_annotations switched buffers more than once.
4350 build_annotations_unwind (buf
)
4355 if (XBUFFER (buf
) == current_buffer
)
4357 tembuf
= Fcurrent_buffer ();
4359 Fkill_buffer (tembuf
);
4363 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4364 "r\nFWrite region to file: \ni\ni\ni\np",
4365 "Write current region into specified file.\n\
4366 When called from a program, takes three arguments:\n\
4367 START, END and FILENAME. START and END are buffer positions.\n\
4368 Optional fourth argument APPEND if non-nil means\n\
4369 append to existing file contents (if any). If it is an integer,\n\
4370 seek to that offset in the file before writing.\n\
4371 Optional fifth argument VISIT if t means\n\
4372 set the last-save-file-modtime of buffer to this file's modtime\n\
4373 and mark buffer not modified.\n\
4374 If VISIT is a string, it is a second file name;\n\
4375 the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\
4376 VISIT is also the file name to lock and unlock for clash detection.\n\
4377 If VISIT is neither t nor nil nor a string,\n\
4378 that means do not print the \"Wrote file\" message.\n\
4379 The optional sixth arg LOCKNAME, if non-nil, specifies the name to\n\
4380 use for locking and unlocking, overriding FILENAME and VISIT.\n\
4381 The optional seventh arg MUSTBENEW, if non-nil, insists on a check\n\
4382 for an existing file with the same name. If MUSTBENEW is `excl',\n\
4383 that means to get an error if the file already exists; never overwrite.\n\
4384 If MUSTBENEW is neither nil nor `excl', that means ask for\n\
4385 confirmation before overwriting, but do go ahead and overwrite the file\n\
4386 if the user confirms.\n\
4387 Kludgy feature: if START is a string, then that string is written\n\
4388 to the file, instead of any buffer contents, and END is ignored.\n\
4390 This does code conversion according to the value of\n\
4391 `coding-system-for-write', `buffer-file-coding-system', or\n\
4392 `file-coding-system-alist', and sets the variable\n\
4393 `last-coding-system-used' to the coding system actually used.")
4395 (start
, end
, filename
, append
, visit
, lockname
, mustbenew
)
4396 Lisp_Object start
, end
, filename
, append
, visit
, lockname
, mustbenew
;
4404 int count
= specpdl_ptr
- specpdl
;
4407 unsigned char *fname
= 0; /* If non-0, original filename (must rename) */
4409 Lisp_Object handler
;
4410 Lisp_Object visit_file
;
4411 Lisp_Object annotations
;
4412 Lisp_Object encoded_filename
;
4413 int visiting
, quietly
;
4414 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4415 struct buffer
*given_buffer
;
4417 int buffer_file_type
= O_BINARY
;
4419 struct coding_system coding
;
4421 if (current_buffer
->base_buffer
&& ! NILP (visit
))
4422 error ("Cannot do file visiting in an indirect buffer");
4424 if (!NILP (start
) && !STRINGP (start
))
4425 validate_region (&start
, &end
);
4427 GCPRO4 (start
, filename
, visit
, lockname
);
4429 /* Decide the coding-system to encode the data with. */
4435 else if (!NILP (Vcoding_system_for_write
))
4436 val
= Vcoding_system_for_write
;
4439 /* If the variable `buffer-file-coding-system' is set locally,
4440 it means that the file was read with some kind of code
4441 conversion or the varialbe is explicitely set by users. We
4442 had better write it out with the same coding system even if
4443 `enable-multibyte-characters' is nil.
4445 If it is not set locally, we anyway have to convert EOL
4446 format if the default value of `buffer-file-coding-system'
4447 tells that it is not Unix-like (LF only) format. */
4448 int using_default_coding
= 0;
4449 int force_raw_text
= 0;
4451 val
= current_buffer
->buffer_file_coding_system
;
4453 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4456 if (NILP (current_buffer
->enable_multibyte_characters
))
4462 /* Check file-coding-system-alist. */
4463 Lisp_Object args
[7], coding_systems
;
4465 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4466 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4468 coding_systems
= Ffind_operation_coding_system (7, args
);
4469 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4470 val
= XCDR (coding_systems
);
4474 && !NILP (current_buffer
->buffer_file_coding_system
))
4476 /* If we still have not decided a coding system, use the
4477 default value of buffer-file-coding-system. */
4478 val
= current_buffer
->buffer_file_coding_system
;
4479 using_default_coding
= 1;
4483 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4484 /* Confirm that VAL can surely encode the current region. */
4485 val
= call3 (Vselect_safe_coding_system_function
, start
, end
, val
);
4487 setup_coding_system (Fcheck_coding_system (val
), &coding
);
4488 if (coding
.eol_type
== CODING_EOL_UNDECIDED
4489 && !using_default_coding
)
4491 if (! EQ (default_buffer_file_coding
.symbol
,
4492 buffer_defaults
.buffer_file_coding_system
))
4493 setup_coding_system (buffer_defaults
.buffer_file_coding_system
,
4494 &default_buffer_file_coding
);
4495 if (default_buffer_file_coding
.eol_type
!= CODING_EOL_UNDECIDED
)
4497 Lisp_Object subsidiaries
;
4499 coding
.eol_type
= default_buffer_file_coding
.eol_type
;
4500 subsidiaries
= Fget (coding
.symbol
, Qeol_type
);
4501 if (VECTORP (subsidiaries
)
4502 && XVECTOR (subsidiaries
)->size
== 3)
4504 = XVECTOR (subsidiaries
)->contents
[coding
.eol_type
];
4509 setup_raw_text_coding_system (&coding
);
4510 goto done_setup_coding
;
4513 setup_coding_system (Fcheck_coding_system (val
), &coding
);
4516 if (!STRINGP (start
) && !NILP (current_buffer
->selective_display
))
4517 coding
.mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4520 Vlast_coding_system_used
= coding
.symbol
;
4522 filename
= Fexpand_file_name (filename
, Qnil
);
4524 if (! NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4525 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4527 if (STRINGP (visit
))
4528 visit_file
= Fexpand_file_name (visit
, Qnil
);
4530 visit_file
= filename
;
4533 visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4534 quietly
= !NILP (visit
);
4538 if (NILP (lockname
))
4539 lockname
= visit_file
;
4541 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4543 /* If the file name has special constructs in it,
4544 call the corresponding file handler. */
4545 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4546 /* If FILENAME has no handler, see if VISIT has one. */
4547 if (NILP (handler
) && STRINGP (visit
))
4548 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4550 if (!NILP (handler
))
4553 val
= call6 (handler
, Qwrite_region
, start
, end
,
4554 filename
, append
, visit
);
4558 SAVE_MODIFF
= MODIFF
;
4559 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4560 current_buffer
->filename
= visit_file
;
4566 /* Special kludge to simplify auto-saving. */
4569 XSETFASTINT (start
, BEG
);
4570 XSETFASTINT (end
, Z
);
4573 record_unwind_protect (build_annotations_unwind
, Fcurrent_buffer ());
4574 count1
= specpdl_ptr
- specpdl
;
4576 given_buffer
= current_buffer
;
4577 annotations
= build_annotations (start
, end
, coding
.pre_write_conversion
);
4578 if (current_buffer
!= given_buffer
)
4580 XSETFASTINT (start
, BEGV
);
4581 XSETFASTINT (end
, ZV
);
4584 #ifdef CLASH_DETECTION
4587 #if 0 /* This causes trouble for GNUS. */
4588 /* If we've locked this file for some other buffer,
4589 query before proceeding. */
4590 if (!visiting
&& EQ (Ffile_locked_p (lockname
), Qt
))
4591 call2 (intern ("ask-user-about-lock"), filename
, Vuser_login_name
);
4594 lock_file (lockname
);
4596 #endif /* CLASH_DETECTION */
4598 encoded_filename
= ENCODE_FILE (filename
);
4600 fn
= XSTRING (encoded_filename
)->data
;
4604 desc
= emacs_open (fn
, O_WRONLY
| buffer_file_type
, 0);
4605 #else /* not DOS_NT */
4606 desc
= emacs_open (fn
, O_WRONLY
, 0);
4607 #endif /* not DOS_NT */
4609 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
4611 if (auto_saving
) /* Overwrite any previous version of autosave file */
4613 vms_truncate (fn
); /* if fn exists, truncate to zero length */
4614 desc
= emacs_open (fn
, O_RDWR
, 0);
4616 desc
= creat_copy_attrs (STRINGP (current_buffer
->filename
)
4617 ? XSTRING (current_buffer
->filename
)->data
: 0,
4620 else /* Write to temporary name and rename if no errors */
4622 Lisp_Object temp_name
;
4623 temp_name
= Ffile_name_directory (filename
);
4625 if (!NILP (temp_name
))
4627 temp_name
= Fmake_temp_name (concat2 (temp_name
,
4628 build_string ("$$SAVE$$")));
4629 fname
= XSTRING (filename
)->data
;
4630 fn
= XSTRING (temp_name
)->data
;
4631 desc
= creat_copy_attrs (fname
, fn
);
4634 /* If we can't open the temporary file, try creating a new
4635 version of the original file. VMS "creat" creates a
4636 new version rather than truncating an existing file. */
4639 desc
= creat (fn
, 0666);
4640 #if 0 /* This can clobber an existing file and fail to replace it,
4641 if the user runs out of space. */
4644 /* We can't make a new version;
4645 try to truncate and rewrite existing version if any. */
4647 desc
= emacs_open (fn
, O_RDWR
, 0);
4653 desc
= creat (fn
, 0666);
4657 desc
= emacs_open (fn
,
4658 O_WRONLY
| O_TRUNC
| O_CREAT
| buffer_file_type
4659 | (mustbenew
== Qexcl
? O_EXCL
: 0),
4660 S_IREAD
| S_IWRITE
);
4661 #else /* not DOS_NT */
4662 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
4663 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
4664 auto_saving
? auto_save_mode_bits
: 0666);
4665 #endif /* not DOS_NT */
4666 #endif /* not VMS */
4670 #ifdef CLASH_DETECTION
4672 if (!auto_saving
) unlock_file (lockname
);
4674 #endif /* CLASH_DETECTION */
4676 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
4679 record_unwind_protect (close_file_unwind
, make_number (desc
));
4681 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
4685 if (NUMBERP (append
))
4686 ret
= lseek (desc
, XINT (append
), 1);
4688 ret
= lseek (desc
, 0, 2);
4691 #ifdef CLASH_DETECTION
4692 if (!auto_saving
) unlock_file (lockname
);
4693 #endif /* CLASH_DETECTION */
4695 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
4703 * Kludge Warning: The VMS C RTL likes to insert carriage returns
4704 * if we do writes that don't end with a carriage return. Furthermore
4705 * it cannot handle writes of more then 16K. The modified
4706 * version of "sys_write" in SYSDEP.C (see comment there) copes with
4707 * this EXCEPT for the last record (iff it doesn't end with a carriage
4708 * return). This implies that if your buffer doesn't end with a carriage
4709 * return, you get one free... tough. However it also means that if
4710 * we make two calls to sys_write (a la the following code) you can
4711 * get one at the gap as well. The easiest way to fix this (honest)
4712 * is to move the gap to the next newline (or the end of the buffer).
4717 if (GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
4718 move_gap (find_next_newline (GPT
, 1));
4720 /* Whether VMS or not, we must move the gap to the next of newline
4721 when we must put designation sequences at beginning of line. */
4722 if (INTEGERP (start
)
4723 && coding
.type
== coding_type_iso2022
4724 && coding
.flags
& CODING_FLAG_ISO_DESIGNATE_AT_BOL
4725 && GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
4727 int opoint
= PT
, opoint_byte
= PT_BYTE
;
4728 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 0);
4729 move_gap_both (PT
, PT_BYTE
);
4730 SET_PT_BOTH (opoint
, opoint_byte
);
4737 if (STRINGP (start
))
4739 failure
= 0 > a_write (desc
, start
, 0, XSTRING (start
)->size
,
4740 &annotations
, &coding
);
4743 else if (XINT (start
) != XINT (end
))
4745 tem
= CHAR_TO_BYTE (XINT (start
));
4747 if (XINT (start
) < GPT
)
4749 failure
= 0 > a_write (desc
, Qnil
, XINT (start
),
4750 min (GPT
, XINT (end
)) - XINT (start
),
4751 &annotations
, &coding
);
4755 if (XINT (end
) > GPT
&& !failure
)
4757 tem
= max (XINT (start
), GPT
);
4758 failure
= 0 > a_write (desc
, Qnil
, tem
, XINT (end
) - tem
,
4759 &annotations
, &coding
);
4765 /* If file was empty, still need to write the annotations */
4766 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4767 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
4771 if (CODING_REQUIRE_FLUSHING (&coding
)
4772 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
4775 /* We have to flush out a data. */
4776 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4777 failure
= 0 > e_write (desc
, Qnil
, 0, 0, &coding
);
4784 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
4785 Disk full in NFS may be reported here. */
4786 /* mib says that closing the file will try to write as fast as NFS can do
4787 it, and that means the fsync here is not crucial for autosave files. */
4788 if (!auto_saving
&& fsync (desc
) < 0)
4790 /* If fsync fails with EINTR, don't treat that as serious. */
4792 failure
= 1, save_errno
= errno
;
4796 /* Spurious "file has changed on disk" warnings have been
4797 observed on Suns as well.
4798 It seems that `close' can change the modtime, under nfs.
4800 (This has supposedly been fixed in Sunos 4,
4801 but who knows about all the other machines with NFS?) */
4804 /* On VMS and APOLLO, must do the stat after the close
4805 since closing changes the modtime. */
4808 /* Recall that #if defined does not work on VMS. */
4815 /* NFS can report a write failure now. */
4816 if (emacs_close (desc
) < 0)
4817 failure
= 1, save_errno
= errno
;
4820 /* If we wrote to a temporary name and had no errors, rename to real name. */
4824 failure
= (rename (fn
, fname
) != 0), save_errno
= errno
;
4832 /* Discard the unwind protect for close_file_unwind. */
4833 specpdl_ptr
= specpdl
+ count1
;
4834 /* Restore the original current buffer. */
4835 visit_file
= unbind_to (count
, visit_file
);
4837 #ifdef CLASH_DETECTION
4839 unlock_file (lockname
);
4840 #endif /* CLASH_DETECTION */
4842 /* Do this before reporting IO error
4843 to avoid a "file has changed on disk" warning on
4844 next attempt to save. */
4846 current_buffer
->modtime
= st
.st_mtime
;
4849 error ("IO error writing %s: %s", XSTRING (filename
)->data
,
4850 emacs_strerror (save_errno
));
4854 SAVE_MODIFF
= MODIFF
;
4855 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4856 current_buffer
->filename
= visit_file
;
4857 update_mode_lines
++;
4863 message_with_string ("Wrote %s", visit_file
, 1);
4868 Lisp_Object
merge ();
4870 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
4871 "Return t if (car A) is numerically less than (car B).")
4875 return Flss (Fcar (a
), Fcar (b
));
4878 /* Build the complete list of annotations appropriate for writing out
4879 the text between START and END, by calling all the functions in
4880 write-region-annotate-functions and merging the lists they return.
4881 If one of these functions switches to a different buffer, we assume
4882 that buffer contains altered text. Therefore, the caller must
4883 make sure to restore the current buffer in all cases,
4884 as save-excursion would do. */
4887 build_annotations (start
, end
, pre_write_conversion
)
4888 Lisp_Object start
, end
, pre_write_conversion
;
4890 Lisp_Object annotations
;
4892 struct gcpro gcpro1
, gcpro2
;
4893 Lisp_Object original_buffer
;
4896 XSETBUFFER (original_buffer
, current_buffer
);
4899 p
= Vwrite_region_annotate_functions
;
4900 GCPRO2 (annotations
, p
);
4903 struct buffer
*given_buffer
= current_buffer
;
4904 Vwrite_region_annotations_so_far
= annotations
;
4905 res
= call2 (Fcar (p
), start
, end
);
4906 /* If the function makes a different buffer current,
4907 assume that means this buffer contains altered text to be output.
4908 Reset START and END from the buffer bounds
4909 and discard all previous annotations because they should have
4910 been dealt with by this function. */
4911 if (current_buffer
!= given_buffer
)
4913 XSETFASTINT (start
, BEGV
);
4914 XSETFASTINT (end
, ZV
);
4917 Flength (res
); /* Check basic validity of return value */
4918 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4922 /* Now do the same for annotation functions implied by the file-format */
4923 if (auto_saving
&& (!EQ (Vauto_save_file_format
, Qt
)))
4924 p
= Vauto_save_file_format
;
4926 p
= current_buffer
->file_format
;
4927 for (i
= 0; !NILP (p
); p
= Fcdr (p
), ++i
)
4929 struct buffer
*given_buffer
= current_buffer
;
4931 Vwrite_region_annotations_so_far
= annotations
;
4933 /* Value is either a list of annotations or nil if the function
4934 has written annotations to a temporary buffer, which is now
4936 res
= call5 (Qformat_annotate_function
, Fcar (p
), start
, end
,
4937 original_buffer
, make_number (i
));
4938 if (current_buffer
!= given_buffer
)
4940 XSETFASTINT (start
, BEGV
);
4941 XSETFASTINT (end
, ZV
);
4946 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4949 /* At last, do the same for the function PRE_WRITE_CONVERSION
4950 implied by the current coding-system. */
4951 if (!NILP (pre_write_conversion
))
4953 struct buffer
*given_buffer
= current_buffer
;
4954 Vwrite_region_annotations_so_far
= annotations
;
4955 res
= call2 (pre_write_conversion
, start
, end
);
4957 annotations
= (current_buffer
!= given_buffer
4959 : merge (annotations
, res
, Qcar_less_than_car
));
4966 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
4967 If STRING is nil, POS is the character position in the current buffer.
4968 Intersperse with them the annotations from *ANNOT
4969 which fall within the range of POS to POS + NCHARS,
4970 each at its appropriate position.
4972 We modify *ANNOT by discarding elements as we use them up.
4974 The return value is negative in case of system call failure. */
4977 a_write (desc
, string
, pos
, nchars
, annot
, coding
)
4980 register int nchars
;
4983 struct coding_system
*coding
;
4987 int lastpos
= pos
+ nchars
;
4989 while (NILP (*annot
) || CONSP (*annot
))
4991 tem
= Fcar_safe (Fcar (*annot
));
4994 nextpos
= XFASTINT (tem
);
4996 /* If there are no more annotations in this range,
4997 output the rest of the range all at once. */
4998 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
4999 return e_write (desc
, string
, pos
, lastpos
, coding
);
5001 /* Output buffer text up to the next annotation's position. */
5004 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
5008 /* Output the annotation. */
5009 tem
= Fcdr (Fcar (*annot
));
5012 if (0 > e_write (desc
, tem
, 0, XSTRING (tem
)->size
, coding
))
5015 *annot
= Fcdr (*annot
);
5020 #ifndef WRITE_BUF_SIZE
5021 #define WRITE_BUF_SIZE (16 * 1024)
5024 /* Write text in the range START and END into descriptor DESC,
5025 encoding them with coding system CODING. If STRING is nil, START
5026 and END are character positions of the current buffer, else they
5027 are indexes to the string STRING. */
5030 e_write (desc
, string
, start
, end
, coding
)
5034 struct coding_system
*coding
;
5036 register char *addr
;
5037 register int nbytes
;
5038 char buf
[WRITE_BUF_SIZE
];
5040 int require_encoding_p
;
5043 coding
->composing
= COMPOSITION_DISABLED
;
5044 if (coding
->composing
!= COMPOSITION_DISABLED
)
5045 coding_save_composition (coding
, start
, end
, string
);
5047 if (STRINGP (string
))
5049 addr
= XSTRING (string
)->data
;
5050 nbytes
= STRING_BYTES (XSTRING (string
));
5051 coding
->src_multibyte
= STRING_MULTIBYTE (string
);
5053 else if (start
< end
)
5055 /* It is assured that the gap is not in the range START and END-1. */
5056 addr
= CHAR_POS_ADDR (start
);
5057 nbytes
= CHAR_TO_BYTE (end
) - CHAR_TO_BYTE (start
);
5058 coding
->src_multibyte
5059 = !NILP (current_buffer
->enable_multibyte_characters
);
5065 coding
->src_multibyte
= 1;
5068 /* We used to have a code for handling selective display here. But,
5069 now it is handled within encode_coding. */
5074 result
= encode_coding (coding
, addr
, buf
, nbytes
, WRITE_BUF_SIZE
);
5075 if (coding
->produced
> 0)
5077 coding
->produced
-= emacs_write (desc
, buf
, coding
->produced
);
5078 if (coding
->produced
)
5084 nbytes
-= coding
->consumed
;
5085 addr
+= coding
->consumed
;
5086 if (result
== CODING_FINISH_INSUFFICIENT_SRC
5089 /* The source text ends by an incomplete multibyte form.
5090 There's no way other than write it out as is. */
5091 nbytes
-= emacs_write (desc
, addr
, nbytes
);
5100 start
+= coding
->consumed_char
;
5101 if (coding
->cmp_data
)
5102 coding_adjust_composition_offset (coding
, start
);
5105 if (coding
->cmp_data
)
5106 coding_free_composition_data (coding
);
5111 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5112 Sverify_visited_file_modtime
, 1, 1, 0,
5113 "Return t if last mod time of BUF's visited file matches what BUF records.\n\
5114 This means that the file has not been changed since it was visited or saved.")
5120 Lisp_Object handler
;
5121 Lisp_Object filename
;
5123 CHECK_BUFFER (buf
, 0);
5126 if (!STRINGP (b
->filename
)) return Qt
;
5127 if (b
->modtime
== 0) return Qt
;
5129 /* If the file name has special constructs in it,
5130 call the corresponding file handler. */
5131 handler
= Ffind_file_name_handler (b
->filename
,
5132 Qverify_visited_file_modtime
);
5133 if (!NILP (handler
))
5134 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5136 filename
= ENCODE_FILE (b
->filename
);
5138 if (stat (XSTRING (filename
)->data
, &st
) < 0)
5140 /* If the file doesn't exist now and didn't exist before,
5141 we say that it isn't modified, provided the error is a tame one. */
5142 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5147 if (st
.st_mtime
== b
->modtime
5148 /* If both are positive, accept them if they are off by one second. */
5149 || (st
.st_mtime
> 0 && b
->modtime
> 0
5150 && (st
.st_mtime
== b
->modtime
+ 1
5151 || st
.st_mtime
== b
->modtime
- 1)))
5156 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5157 Sclear_visited_file_modtime
, 0, 0, 0,
5158 "Clear out records of last mod time of visited file.\n\
5159 Next attempt to save will certainly not complain of a discrepancy.")
5162 current_buffer
->modtime
= 0;
5166 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5167 Svisited_file_modtime
, 0, 0, 0,
5168 "Return the current buffer's recorded visited file modification time.\n\
5169 The value is a list of the form (HIGH . LOW), like the time values\n\
5170 that `file-attributes' returns.")
5173 return long_to_cons ((unsigned long) current_buffer
->modtime
);
5176 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5177 Sset_visited_file_modtime
, 0, 1, 0,
5178 "Update buffer's recorded modification time from the visited file's time.\n\
5179 Useful if the buffer was not read from the file normally\n\
5180 or if the file itself has been changed for some known benign reason.\n\
5181 An argument specifies the modification time value to use\n\
5182 \(instead of that of the visited file), in the form of a list\n\
5183 \(HIGH . LOW) or (HIGH LOW).")
5185 Lisp_Object time_list
;
5187 if (!NILP (time_list
))
5188 current_buffer
->modtime
= cons_to_long (time_list
);
5191 register Lisp_Object filename
;
5193 Lisp_Object handler
;
5195 filename
= Fexpand_file_name (current_buffer
->filename
, Qnil
);
5197 /* If the file name has special constructs in it,
5198 call the corresponding file handler. */
5199 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5200 if (!NILP (handler
))
5201 /* The handler can find the file name the same way we did. */
5202 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5204 filename
= ENCODE_FILE (filename
);
5206 if (stat (XSTRING (filename
)->data
, &st
) >= 0)
5207 current_buffer
->modtime
= st
.st_mtime
;
5217 message_with_string ("Autosaving...error for %s", current_buffer
->name
, 1);
5218 Fsleep_for (make_number (1), Qnil
);
5219 message_with_string ("Autosaving...error for %s", current_buffer
->name
, 0);
5220 Fsleep_for (make_number (1), Qnil
);
5221 message_with_string ("Autosaving...error for %s", current_buffer
->name
, 0);
5222 Fsleep_for (make_number (1), Qnil
);
5231 /* Get visited file's mode to become the auto save file's mode. */
5232 if (! NILP (current_buffer
->filename
)
5233 && stat (XSTRING (current_buffer
->filename
)->data
, &st
) >= 0)
5234 /* But make sure we can overwrite it later! */
5235 auto_save_mode_bits
= st
.st_mode
| 0600;
5237 auto_save_mode_bits
= 0666;
5240 Fwrite_region (Qnil
, Qnil
,
5241 current_buffer
->auto_save_file_name
,
5242 Qnil
, Qlambda
, Qnil
, Qnil
);
5246 do_auto_save_unwind (stream
) /* used as unwind-protect function */
5251 fclose ((FILE *) (XFASTINT (XCAR (stream
)) << 16
5252 | XFASTINT (XCDR (stream
))));
5257 do_auto_save_unwind_1 (value
) /* used as unwind-protect function */
5260 minibuffer_auto_raise
= XINT (value
);
5264 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5265 "Auto-save all buffers that need it.\n\
5266 This is all buffers that have auto-saving enabled\n\
5267 and are changed since last auto-saved.\n\
5268 Auto-saving writes the buffer into a file\n\
5269 so that your editing is not lost if the system crashes.\n\
5270 This file is not the file you visited; that changes only when you save.\n\
5271 Normally we run the normal hook `auto-save-hook' before saving.\n\n\
5272 A non-nil NO-MESSAGE argument means do not print any message if successful.\n\
5273 A non-nil CURRENT-ONLY argument means save only current buffer.")
5274 (no_message
, current_only
)
5275 Lisp_Object no_message
, current_only
;
5277 struct buffer
*old
= current_buffer
, *b
;
5278 Lisp_Object tail
, buf
;
5280 int do_handled_files
;
5283 Lisp_Object lispstream
;
5284 int count
= specpdl_ptr
- specpdl
;
5285 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5286 int message_p
= push_message ();
5288 /* Ordinarily don't quit within this function,
5289 but don't make it impossible to quit (in case we get hung in I/O). */
5293 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5294 point to non-strings reached from Vbuffer_alist. */
5299 if (!NILP (Vrun_hooks
))
5300 call1 (Vrun_hooks
, intern ("auto-save-hook"));
5302 if (STRINGP (Vauto_save_list_file_name
))
5304 Lisp_Object listfile
, dir
;
5306 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5308 dir
= Ffile_name_directory (listfile
);
5309 if (NILP (Ffile_directory_p (dir
)))
5310 call2 (Qmake_directory
, dir
, Qt
);
5312 stream
= fopen (XSTRING (listfile
)->data
, "w");
5315 /* Arrange to close that file whether or not we get an error.
5316 Also reset auto_saving to 0. */
5317 lispstream
= Fcons (Qnil
, Qnil
);
5318 XSETFASTINT (XCAR (lispstream
), (EMACS_UINT
)stream
>> 16);
5319 XSETFASTINT (XCDR (lispstream
), (EMACS_UINT
)stream
& 0xffff);
5330 record_unwind_protect (do_auto_save_unwind
, lispstream
);
5331 record_unwind_protect (do_auto_save_unwind_1
,
5332 make_number (minibuffer_auto_raise
));
5333 minibuffer_auto_raise
= 0;
5336 /* First, save all files which don't have handlers. If Emacs is
5337 crashing, the handlers may tweak what is causing Emacs to crash
5338 in the first place, and it would be a shame if Emacs failed to
5339 autosave perfectly ordinary files because it couldn't handle some
5341 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5342 for (tail
= Vbuffer_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5344 buf
= XCDR (XCAR (tail
));
5347 /* Record all the buffers that have auto save mode
5348 in the special file that lists them. For each of these buffers,
5349 Record visited name (if any) and auto save name. */
5350 if (STRINGP (b
->auto_save_file_name
)
5351 && stream
!= NULL
&& do_handled_files
== 0)
5353 if (!NILP (b
->filename
))
5355 fwrite (XSTRING (b
->filename
)->data
, 1,
5356 STRING_BYTES (XSTRING (b
->filename
)), stream
);
5358 putc ('\n', stream
);
5359 fwrite (XSTRING (b
->auto_save_file_name
)->data
, 1,
5360 STRING_BYTES (XSTRING (b
->auto_save_file_name
)), stream
);
5361 putc ('\n', stream
);
5364 if (!NILP (current_only
)
5365 && b
!= current_buffer
)
5368 /* Don't auto-save indirect buffers.
5369 The base buffer takes care of it. */
5373 /* Check for auto save enabled
5374 and file changed since last auto save
5375 and file changed since last real save. */
5376 if (STRINGP (b
->auto_save_file_name
)
5377 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5378 && b
->auto_save_modified
< BUF_MODIFF (b
)
5379 /* -1 means we've turned off autosaving for a while--see below. */
5380 && XINT (b
->save_length
) >= 0
5381 && (do_handled_files
5382 || NILP (Ffind_file_name_handler (b
->auto_save_file_name
,
5385 EMACS_TIME before_time
, after_time
;
5387 EMACS_GET_TIME (before_time
);
5389 /* If we had a failure, don't try again for 20 minutes. */
5390 if (b
->auto_save_failure_time
>= 0
5391 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5394 if ((XFASTINT (b
->save_length
) * 10
5395 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5396 /* A short file is likely to change a large fraction;
5397 spare the user annoying messages. */
5398 && XFASTINT (b
->save_length
) > 5000
5399 /* These messages are frequent and annoying for `*mail*'. */
5400 && !EQ (b
->filename
, Qnil
)
5401 && NILP (no_message
))
5403 /* It has shrunk too much; turn off auto-saving here. */
5404 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5405 message_with_string ("Buffer %s has shrunk a lot; auto save turned off there",
5407 minibuffer_auto_raise
= 0;
5408 /* Turn off auto-saving until there's a real save,
5409 and prevent any more warnings. */
5410 XSETINT (b
->save_length
, -1);
5411 Fsleep_for (make_number (1), Qnil
);
5414 set_buffer_internal (b
);
5415 if (!auto_saved
&& NILP (no_message
))
5416 message1 ("Auto-saving...");
5417 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5419 b
->auto_save_modified
= BUF_MODIFF (b
);
5420 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5421 set_buffer_internal (old
);
5423 EMACS_GET_TIME (after_time
);
5425 /* If auto-save took more than 60 seconds,
5426 assume it was an NFS failure that got a timeout. */
5427 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5428 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5432 /* Prevent another auto save till enough input events come in. */
5433 record_auto_save ();
5435 if (auto_saved
&& NILP (no_message
))
5439 sit_for (1, 0, 0, 0, 0);
5443 message1 ("Auto-saving...done");
5449 unbind_to (count
, Qnil
);
5453 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5454 Sset_buffer_auto_saved
, 0, 0, 0,
5455 "Mark current buffer as auto-saved with its current text.\n\
5456 No auto-save file will be written until the buffer changes again.")
5459 current_buffer
->auto_save_modified
= MODIFF
;
5460 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5461 current_buffer
->auto_save_failure_time
= -1;
5465 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
5466 Sclear_buffer_auto_save_failure
, 0, 0, 0,
5467 "Clear any record of a recent auto-save failure in the current buffer.")
5470 current_buffer
->auto_save_failure_time
= -1;
5474 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
5476 "Return t if buffer has been auto-saved since last read in or saved.")
5479 return (SAVE_MODIFF
< current_buffer
->auto_save_modified
) ? Qt
: Qnil
;
5482 /* Reading and completing file names */
5483 extern Lisp_Object
Ffile_name_completion (), Ffile_name_all_completions ();
5485 /* In the string VAL, change each $ to $$ and return the result. */
5488 double_dollars (val
)
5491 register unsigned char *old
, *new;
5495 osize
= STRING_BYTES (XSTRING (val
));
5497 /* Count the number of $ characters. */
5498 for (n
= osize
, count
= 0, old
= XSTRING (val
)->data
; n
> 0; n
--)
5499 if (*old
++ == '$') count
++;
5502 old
= XSTRING (val
)->data
;
5503 val
= make_uninit_multibyte_string (XSTRING (val
)->size
+ count
,
5505 new = XSTRING (val
)->data
;
5506 for (n
= osize
; n
> 0; n
--)
5519 DEFUN ("read-file-name-internal", Fread_file_name_internal
, Sread_file_name_internal
,
5521 "Internal subroutine for read-file-name. Do not call this.")
5522 (string
, dir
, action
)
5523 Lisp_Object string
, dir
, action
;
5524 /* action is nil for complete, t for return list of completions,
5525 lambda for verify final value */
5527 Lisp_Object name
, specdir
, realdir
, val
, orig_string
;
5529 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
5531 CHECK_STRING (string
, 0);
5538 /* No need to protect ACTION--we only compare it with t and nil. */
5539 GCPRO5 (string
, realdir
, name
, specdir
, orig_string
);
5541 if (XSTRING (string
)->size
== 0)
5543 if (EQ (action
, Qlambda
))
5551 orig_string
= string
;
5552 string
= Fsubstitute_in_file_name (string
);
5553 changed
= NILP (Fstring_equal (string
, orig_string
));
5554 name
= Ffile_name_nondirectory (string
);
5555 val
= Ffile_name_directory (string
);
5557 realdir
= Fexpand_file_name (val
, realdir
);
5562 specdir
= Ffile_name_directory (string
);
5563 val
= Ffile_name_completion (name
, realdir
);
5568 return double_dollars (string
);
5572 if (!NILP (specdir
))
5573 val
= concat2 (specdir
, val
);
5575 return double_dollars (val
);
5578 #endif /* not VMS */
5582 if (EQ (action
, Qt
))
5583 return Ffile_name_all_completions (name
, realdir
);
5584 /* Only other case actually used is ACTION = lambda */
5586 /* Supposedly this helps commands such as `cd' that read directory names,
5587 but can someone explain how it helps them? -- RMS */
5588 if (XSTRING (name
)->size
== 0)
5591 return Ffile_exists_p (string
);
5594 DEFUN ("read-file-name", Fread_file_name
, Sread_file_name
, 1, 5, 0,
5595 "Read file name, prompting with PROMPT and completing in directory DIR.\n\
5596 Value is not expanded---you must call `expand-file-name' yourself.\n\
5597 Default name to DEFAULT-FILENAME if user enters a null string.\n\
5598 (If DEFAULT-FILENAME is omitted, the visited file name is used,\n\
5599 except that if INITIAL is specified, that combined with DIR is used.)\n\
5600 Fourth arg MUSTMATCH non-nil means require existing file's name.\n\
5601 Non-nil and non-t means also require confirmation after completion.\n\
5602 Fifth arg INITIAL specifies text to start with.\n\
5603 DIR defaults to current buffer's directory default.")
5604 (prompt
, dir
, default_filename
, mustmatch
, initial
)
5605 Lisp_Object prompt
, dir
, default_filename
, mustmatch
, initial
;
5607 Lisp_Object val
, insdef
, tem
;
5608 struct gcpro gcpro1
, gcpro2
;
5609 register char *homedir
;
5610 int replace_in_history
= 0;
5611 int add_to_history
= 0;
5615 dir
= current_buffer
->directory
;
5616 if (NILP (default_filename
))
5618 if (! NILP (initial
))
5619 default_filename
= Fexpand_file_name (initial
, dir
);
5621 default_filename
= current_buffer
->filename
;
5624 /* If dir starts with user's homedir, change that to ~. */
5625 homedir
= (char *) egetenv ("HOME");
5627 homedir
= strcpy (alloca (strlen (homedir
) + 1), homedir
);
5628 CORRECT_DIR_SEPS (homedir
);
5632 && !strncmp (homedir
, XSTRING (dir
)->data
, strlen (homedir
))
5633 && IS_DIRECTORY_SEP (XSTRING (dir
)->data
[strlen (homedir
)]))
5635 dir
= make_string (XSTRING (dir
)->data
+ strlen (homedir
) - 1,
5636 STRING_BYTES (XSTRING (dir
)) - strlen (homedir
) + 1);
5637 XSTRING (dir
)->data
[0] = '~';
5639 /* Likewise for default_filename. */
5641 && STRINGP (default_filename
)
5642 && !strncmp (homedir
, XSTRING (default_filename
)->data
, strlen (homedir
))
5643 && IS_DIRECTORY_SEP (XSTRING (default_filename
)->data
[strlen (homedir
)]))
5646 = make_string (XSTRING (default_filename
)->data
+ strlen (homedir
) - 1,
5647 STRING_BYTES (XSTRING (default_filename
)) - strlen (homedir
) + 1);
5648 XSTRING (default_filename
)->data
[0] = '~';
5650 if (!NILP (default_filename
))
5652 CHECK_STRING (default_filename
, 3);
5653 default_filename
= double_dollars (default_filename
);
5656 if (insert_default_directory
&& STRINGP (dir
))
5659 if (!NILP (initial
))
5661 Lisp_Object args
[2], pos
;
5665 insdef
= Fconcat (2, args
);
5666 pos
= make_number (XSTRING (double_dollars (dir
))->size
);
5667 insdef
= Fcons (double_dollars (insdef
), pos
);
5670 insdef
= double_dollars (insdef
);
5672 else if (STRINGP (initial
))
5673 insdef
= Fcons (double_dollars (initial
), make_number (0));
5677 count
= specpdl_ptr
- specpdl
;
5679 specbind (intern ("completion-ignore-case"), Qt
);
5682 specbind (intern ("minibuffer-completing-file-name"), Qt
);
5684 GCPRO2 (insdef
, default_filename
);
5686 #if defined (USE_MOTIF) || defined (HAVE_NTGUI)
5687 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
5691 /* If DIR contains a file name, split it. */
5693 file
= Ffile_name_nondirectory (dir
);
5694 if (XSTRING (file
)->size
&& NILP (default_filename
))
5696 default_filename
= file
;
5697 dir
= Ffile_name_directory (dir
);
5699 if (!NILP(default_filename
))
5700 default_filename
= Fexpand_file_name (default_filename
, dir
);
5701 val
= Fx_file_dialog (prompt
, dir
, default_filename
, mustmatch
);
5706 val
= Fcompleting_read (prompt
, intern ("read-file-name-internal"),
5707 dir
, mustmatch
, insdef
,
5708 Qfile_name_history
, default_filename
, Qnil
);
5710 tem
= Fsymbol_value (Qfile_name_history
);
5711 if (CONSP (tem
) && EQ (XCAR (tem
), val
))
5712 replace_in_history
= 1;
5714 /* If Fcompleting_read returned the inserted default string itself
5715 (rather than a new string with the same contents),
5716 it has to mean that the user typed RET with the minibuffer empty.
5717 In that case, we really want to return ""
5718 so that commands such as set-visited-file-name can distinguish. */
5719 if (EQ (val
, default_filename
))
5721 /* In this case, Fcompleting_read has not added an element
5722 to the history. Maybe we should. */
5723 if (! replace_in_history
)
5726 val
= build_string ("");
5729 unbind_to (count
, Qnil
);
5732 error ("No file name specified");
5734 tem
= Fstring_equal (val
, CONSP (insdef
) ? XCAR (insdef
) : insdef
);
5736 if (!NILP (tem
) && !NILP (default_filename
))
5737 val
= default_filename
;
5738 else if (XSTRING (val
)->size
== 0 && NILP (insdef
))
5740 if (!NILP (default_filename
))
5741 val
= default_filename
;
5743 error ("No default file name");
5745 val
= Fsubstitute_in_file_name (val
);
5747 if (replace_in_history
)
5748 /* Replace what Fcompleting_read added to the history
5749 with what we will actually return. */
5750 XCAR (Fsymbol_value (Qfile_name_history
)) = double_dollars (val
);
5751 else if (add_to_history
)
5753 /* Add the value to the history--but not if it matches
5754 the last value already there. */
5755 Lisp_Object val1
= double_dollars (val
);
5756 tem
= Fsymbol_value (Qfile_name_history
);
5757 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
5758 Fset (Qfile_name_history
,
5769 /* Must be set before any path manipulation is performed. */
5770 XSETFASTINT (Vdirectory_sep_char
, '/');
5777 Qexpand_file_name
= intern ("expand-file-name");
5778 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
5779 Qdirectory_file_name
= intern ("directory-file-name");
5780 Qfile_name_directory
= intern ("file-name-directory");
5781 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
5782 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
5783 Qfile_name_as_directory
= intern ("file-name-as-directory");
5784 Qcopy_file
= intern ("copy-file");
5785 Qmake_directory_internal
= intern ("make-directory-internal");
5786 Qmake_directory
= intern ("make-directory");
5787 Qdelete_directory
= intern ("delete-directory");
5788 Qdelete_file
= intern ("delete-file");
5789 Qrename_file
= intern ("rename-file");
5790 Qadd_name_to_file
= intern ("add-name-to-file");
5791 Qmake_symbolic_link
= intern ("make-symbolic-link");
5792 Qfile_exists_p
= intern ("file-exists-p");
5793 Qfile_executable_p
= intern ("file-executable-p");
5794 Qfile_readable_p
= intern ("file-readable-p");
5795 Qfile_writable_p
= intern ("file-writable-p");
5796 Qfile_symlink_p
= intern ("file-symlink-p");
5797 Qaccess_file
= intern ("access-file");
5798 Qfile_directory_p
= intern ("file-directory-p");
5799 Qfile_regular_p
= intern ("file-regular-p");
5800 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
5801 Qfile_modes
= intern ("file-modes");
5802 Qset_file_modes
= intern ("set-file-modes");
5803 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
5804 Qinsert_file_contents
= intern ("insert-file-contents");
5805 Qwrite_region
= intern ("write-region");
5806 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
5807 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
5809 staticpro (&Qexpand_file_name
);
5810 staticpro (&Qsubstitute_in_file_name
);
5811 staticpro (&Qdirectory_file_name
);
5812 staticpro (&Qfile_name_directory
);
5813 staticpro (&Qfile_name_nondirectory
);
5814 staticpro (&Qunhandled_file_name_directory
);
5815 staticpro (&Qfile_name_as_directory
);
5816 staticpro (&Qcopy_file
);
5817 staticpro (&Qmake_directory_internal
);
5818 staticpro (&Qmake_directory
);
5819 staticpro (&Qdelete_directory
);
5820 staticpro (&Qdelete_file
);
5821 staticpro (&Qrename_file
);
5822 staticpro (&Qadd_name_to_file
);
5823 staticpro (&Qmake_symbolic_link
);
5824 staticpro (&Qfile_exists_p
);
5825 staticpro (&Qfile_executable_p
);
5826 staticpro (&Qfile_readable_p
);
5827 staticpro (&Qfile_writable_p
);
5828 staticpro (&Qaccess_file
);
5829 staticpro (&Qfile_symlink_p
);
5830 staticpro (&Qfile_directory_p
);
5831 staticpro (&Qfile_regular_p
);
5832 staticpro (&Qfile_accessible_directory_p
);
5833 staticpro (&Qfile_modes
);
5834 staticpro (&Qset_file_modes
);
5835 staticpro (&Qfile_newer_than_file_p
);
5836 staticpro (&Qinsert_file_contents
);
5837 staticpro (&Qwrite_region
);
5838 staticpro (&Qverify_visited_file_modtime
);
5839 staticpro (&Qset_visited_file_modtime
);
5841 Qfile_name_history
= intern ("file-name-history");
5842 Fset (Qfile_name_history
, Qnil
);
5843 staticpro (&Qfile_name_history
);
5845 Qfile_error
= intern ("file-error");
5846 staticpro (&Qfile_error
);
5847 Qfile_already_exists
= intern ("file-already-exists");
5848 staticpro (&Qfile_already_exists
);
5849 Qfile_date_error
= intern ("file-date-error");
5850 staticpro (&Qfile_date_error
);
5851 Qexcl
= intern ("excl");
5855 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
5856 staticpro (&Qfind_buffer_file_type
);
5859 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
5860 "*Coding system for encoding file names.\n\
5861 If it is nil, default-file-name-coding-system (which see) is used.");
5862 Vfile_name_coding_system
= Qnil
;
5864 DEFVAR_LISP ("default-file-name-coding-system",
5865 &Vdefault_file_name_coding_system
,
5866 "Default coding system for encoding file names.\n\
5867 This variable is used only when file-name-coding-system is nil.\n\
5869 This variable is set/changed by the command set-language-environment.\n\
5870 User should not set this variable manually,\n\
5871 instead use file-name-coding-system to get a constant encoding\n\
5872 of file names regardless of the current language environment.");
5873 Vdefault_file_name_coding_system
= Qnil
;
5875 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format
,
5876 "*Format in which to write auto-save files.\n\
5877 Should be a list of symbols naming formats that are defined in `format-alist'.\n\
5878 If it is t, which is the default, auto-save files are written in the\n\
5879 same format as a regular save would use.");
5880 Vauto_save_file_format
= Qt
;
5882 Qformat_decode
= intern ("format-decode");
5883 staticpro (&Qformat_decode
);
5884 Qformat_annotate_function
= intern ("format-annotate-function");
5885 staticpro (&Qformat_annotate_function
);
5887 Qcar_less_than_car
= intern ("car-less-than-car");
5888 staticpro (&Qcar_less_than_car
);
5890 Fput (Qfile_error
, Qerror_conditions
,
5891 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
5892 Fput (Qfile_error
, Qerror_message
,
5893 build_string ("File error"));
5895 Fput (Qfile_already_exists
, Qerror_conditions
,
5896 Fcons (Qfile_already_exists
,
5897 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
5898 Fput (Qfile_already_exists
, Qerror_message
,
5899 build_string ("File already exists"));
5901 Fput (Qfile_date_error
, Qerror_conditions
,
5902 Fcons (Qfile_date_error
,
5903 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
5904 Fput (Qfile_date_error
, Qerror_message
,
5905 build_string ("Cannot set file date"));
5907 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
5908 "*Non-nil means when reading a filename start with default dir in minibuffer.");
5909 insert_default_directory
= 1;
5911 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
5912 "*Non-nil means write new files with record format `stmlf'.\n\
5913 nil means use format `var'. This variable is meaningful only on VMS.");
5914 vms_stmlf_recfm
= 0;
5916 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
5917 "Directory separator character for built-in functions that return file names.\n\
5918 The value should be either ?/ or ?\\ (any other value is treated as ?\\).\n\
5919 This variable affects the built-in functions only on Windows,\n\
5920 on other platforms, it is initialized so that Lisp code can find out\n\
5921 what the normal separator is.");
5923 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
5924 "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\
5925 If a file name matches REGEXP, then all I/O on that file is done by calling\n\
5928 The first argument given to HANDLER is the name of the I/O primitive\n\
5929 to be handled; the remaining arguments are the arguments that were\n\
5930 passed to that primitive. For example, if you do\n\
5931 (file-exists-p FILENAME)\n\
5932 and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\
5933 (funcall HANDLER 'file-exists-p FILENAME)\n\
5934 The function `find-file-name-handler' checks this list for a handler\n\
5935 for its argument.");
5936 Vfile_name_handler_alist
= Qnil
;
5938 DEFVAR_LISP ("set-auto-coding-function",
5939 &Vset_auto_coding_function
,
5940 "If non-nil, a function to call to decide a coding system of file.\n\
5941 Two arguments are passed to this function: the file name\n\
5942 and the length of a file contents following the point.\n\
5943 This function should return a coding system to decode the file contents.\n\
5944 It should check the file name against `auto-coding-alist'.\n\
5945 If no coding system is decided, it should check a coding system\n\
5946 specified in the heading lines with the format:\n\
5947 -*- ... coding: CODING-SYSTEM; ... -*-\n\
5948 or local variable spec of the tailing lines with `coding:' tag.");
5949 Vset_auto_coding_function
= Qnil
;
5951 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
5952 "A list of functions to be called at the end of `insert-file-contents'.\n\
5953 Each is passed one argument, the number of bytes inserted. It should return\n\
5954 the new byte count, and leave point the same. If `insert-file-contents' is\n\
5955 intercepted by a handler from `file-name-handler-alist', that handler is\n\
5956 responsible for calling the after-insert-file-functions if appropriate.");
5957 Vafter_insert_file_functions
= Qnil
;
5959 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
5960 "A list of functions to be called at the start of `write-region'.\n\
5961 Each is passed two arguments, START and END as for `write-region'.\n\
5962 These are usually two numbers but not always; see the documentation\n\
5963 for `write-region'. The function should return a list of pairs\n\
5964 of the form (POSITION . STRING), consisting of strings to be effectively\n\
5965 inserted at the specified positions of the file being written (1 means to\n\
5966 insert before the first byte written). The POSITIONs must be sorted into\n\
5967 increasing order. If there are several functions in the list, the several\n\
5968 lists are merged destructively.");
5969 Vwrite_region_annotate_functions
= Qnil
;
5971 DEFVAR_LISP ("write-region-annotations-so-far",
5972 &Vwrite_region_annotations_so_far
,
5973 "When an annotation function is called, this holds the previous annotations.\n\
5974 These are the annotations made by other annotation functions\n\
5975 that were already called. See also `write-region-annotate-functions'.");
5976 Vwrite_region_annotations_so_far
= Qnil
;
5978 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
5979 "A list of file name handlers that temporarily should not be used.\n\
5980 This applies only to the operation `inhibit-file-name-operation'.");
5981 Vinhibit_file_name_handlers
= Qnil
;
5983 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
5984 "The operation for which `inhibit-file-name-handlers' is applicable.");
5985 Vinhibit_file_name_operation
= Qnil
;
5987 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
5988 "File name in which we write a list of all auto save file names.\n\
5989 This variable is initialized automatically from `auto-save-list-file-prefix'\n\
5990 shortly after Emacs reads your `.emacs' file, if you have not yet given it\n\
5992 Vauto_save_list_file_name
= Qnil
;
5994 defsubr (&Sfind_file_name_handler
);
5995 defsubr (&Sfile_name_directory
);
5996 defsubr (&Sfile_name_nondirectory
);
5997 defsubr (&Sunhandled_file_name_directory
);
5998 defsubr (&Sfile_name_as_directory
);
5999 defsubr (&Sdirectory_file_name
);
6000 defsubr (&Smake_temp_name
);
6001 defsubr (&Sexpand_file_name
);
6002 defsubr (&Ssubstitute_in_file_name
);
6003 defsubr (&Scopy_file
);
6004 defsubr (&Smake_directory_internal
);
6005 defsubr (&Sdelete_directory
);
6006 defsubr (&Sdelete_file
);
6007 defsubr (&Srename_file
);
6008 defsubr (&Sadd_name_to_file
);
6010 defsubr (&Smake_symbolic_link
);
6011 #endif /* S_IFLNK */
6013 defsubr (&Sdefine_logical_name
);
6016 defsubr (&Ssysnetunam
);
6017 #endif /* HPUX_NET */
6018 defsubr (&Sfile_name_absolute_p
);
6019 defsubr (&Sfile_exists_p
);
6020 defsubr (&Sfile_executable_p
);
6021 defsubr (&Sfile_readable_p
);
6022 defsubr (&Sfile_writable_p
);
6023 defsubr (&Saccess_file
);
6024 defsubr (&Sfile_symlink_p
);
6025 defsubr (&Sfile_directory_p
);
6026 defsubr (&Sfile_accessible_directory_p
);
6027 defsubr (&Sfile_regular_p
);
6028 defsubr (&Sfile_modes
);
6029 defsubr (&Sset_file_modes
);
6030 defsubr (&Sset_default_file_modes
);
6031 defsubr (&Sdefault_file_modes
);
6032 defsubr (&Sfile_newer_than_file_p
);
6033 defsubr (&Sinsert_file_contents
);
6034 defsubr (&Swrite_region
);
6035 defsubr (&Scar_less_than_car
);
6036 defsubr (&Sverify_visited_file_modtime
);
6037 defsubr (&Sclear_visited_file_modtime
);
6038 defsubr (&Svisited_file_modtime
);
6039 defsubr (&Sset_visited_file_modtime
);
6040 defsubr (&Sdo_auto_save
);
6041 defsubr (&Sset_buffer_auto_saved
);
6042 defsubr (&Sclear_buffer_auto_save_failure
);
6043 defsubr (&Srecent_auto_save_p
);
6045 defsubr (&Sread_file_name_internal
);
6046 defsubr (&Sread_file_name
);
6049 defsubr (&Sunix_sync
);