1 /* File IO for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-2011 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 3 of the License, or
10 (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
36 #ifdef HAVE_LIBSELINUX
37 #include <selinux/selinux.h>
38 #include <selinux/context.h>
42 #include "intervals.h"
44 #include "character.h"
47 #include "blockinput.h"
49 #include "dispextern.h"
55 #endif /* not WINDOWSNT */
59 #include <sys/param.h>
64 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
65 redirector allows the six letters between 'Z' and 'a' as well. */
67 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
70 #define IS_DRIVE(x) isalpha ((unsigned char) (x))
72 /* Need to lower-case the drive letter, or else expanded
73 filenames will sometimes compare inequal, because
74 `expand-file-name' doesn't always down-case the drive letter. */
75 #define DRIVE_LETTER(x) (tolower ((unsigned char) (x)))
86 #ifndef FILE_SYSTEM_CASE
87 #define FILE_SYSTEM_CASE(filename) (filename)
90 /* Nonzero during writing of auto-save files */
93 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
94 a new file with the same mode as the original */
95 int auto_save_mode_bits
;
97 /* Set by auto_save_1 if an error occurred during the last auto-save. */
98 int auto_save_error_occurred
;
100 /* The symbol bound to coding-system-for-read when
101 insert-file-contents is called for recovering a file. This is not
102 an actual coding system name, but just an indicator to tell
103 insert-file-contents to use `emacs-mule' with a special flag for
104 auto saving and recovering a file. */
105 Lisp_Object Qauto_save_coding
;
107 /* Property name of a file name handler,
108 which gives a list of operations it handles.. */
109 Lisp_Object Qoperations
;
111 /* Lisp functions for translating file formats */
112 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
114 /* Lisp function for setting buffer-file-coding-system and the
115 multibyteness of the current buffer after inserting a file. */
116 Lisp_Object Qafter_insert_file_set_coding
;
118 Lisp_Object Qwrite_region_annotate_functions
;
119 /* Each time an annotation function changes the buffer, the new buffer
121 Lisp_Object Vwrite_region_annotation_buffers
;
126 Lisp_Object Qdelete_by_moving_to_trash
;
128 /* Lisp function for moving files to trash. */
129 Lisp_Object Qmove_file_to_trash
;
131 /* Lisp function for recursively copying directories. */
132 Lisp_Object Qcopy_directory
;
134 /* Lisp function for recursively deleting directories. */
135 Lisp_Object Qdelete_directory
;
140 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
142 Lisp_Object Qfile_name_history
;
144 Lisp_Object Qcar_less_than_car
;
146 static int a_write (int, Lisp_Object
, int, int,
147 Lisp_Object
*, struct coding_system
*);
148 static int e_write (int, Lisp_Object
, int, int, struct coding_system
*);
152 report_file_error (const char *string
, Lisp_Object data
)
154 Lisp_Object errstring
;
158 synchronize_system_messages_locale ();
159 str
= strerror (errorno
);
160 errstring
= code_convert_string_norecord (make_unibyte_string (str
,
162 Vlocale_coding_system
, 0);
168 xsignal (Qfile_already_exists
, Fcons (errstring
, data
));
171 /* System error messages are capitalized. Downcase the initial
172 unless it is followed by a slash. (The slash case caters to
173 error messages that begin with "I/O" or, in German, "E/A".) */
174 if (STRING_MULTIBYTE (errstring
)
175 && ! EQ (Faref (errstring
, make_number (1)), make_number ('/')))
179 str
= SSDATA (errstring
);
180 c
= STRING_CHAR ((unsigned char *) str
);
181 Faset (errstring
, make_number (0), make_number (downcase (c
)));
184 xsignal (Qfile_error
,
185 Fcons (build_string (string
), Fcons (errstring
, data
)));
190 close_file_unwind (Lisp_Object fd
)
192 emacs_close (XFASTINT (fd
));
196 /* Restore point, having saved it as a marker. */
199 restore_point_unwind (Lisp_Object location
)
201 Fgoto_char (location
);
202 Fset_marker (location
, Qnil
, Qnil
);
207 Lisp_Object Qexpand_file_name
;
208 Lisp_Object Qsubstitute_in_file_name
;
209 Lisp_Object Qdirectory_file_name
;
210 Lisp_Object Qfile_name_directory
;
211 Lisp_Object Qfile_name_nondirectory
;
212 Lisp_Object Qunhandled_file_name_directory
;
213 Lisp_Object Qfile_name_as_directory
;
214 Lisp_Object Qcopy_file
;
215 Lisp_Object Qmake_directory_internal
;
216 Lisp_Object Qmake_directory
;
217 Lisp_Object Qdelete_directory_internal
;
218 Lisp_Object Qdelete_file
;
219 Lisp_Object Qrename_file
;
220 Lisp_Object Qadd_name_to_file
;
221 Lisp_Object Qmake_symbolic_link
;
222 Lisp_Object Qfile_exists_p
;
223 Lisp_Object Qfile_executable_p
;
224 Lisp_Object Qfile_readable_p
;
225 Lisp_Object Qfile_writable_p
;
226 Lisp_Object Qfile_symlink_p
;
227 Lisp_Object Qaccess_file
;
228 Lisp_Object Qfile_directory_p
;
229 Lisp_Object Qfile_regular_p
;
230 Lisp_Object Qfile_accessible_directory_p
;
231 Lisp_Object Qfile_modes
;
232 Lisp_Object Qset_file_modes
;
233 Lisp_Object Qset_file_times
;
234 Lisp_Object Qfile_selinux_context
;
235 Lisp_Object Qset_file_selinux_context
;
236 Lisp_Object Qfile_newer_than_file_p
;
237 Lisp_Object Qinsert_file_contents
;
238 Lisp_Object Qwrite_region
;
239 Lisp_Object Qverify_visited_file_modtime
;
240 Lisp_Object Qset_visited_file_modtime
;
242 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
243 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
244 Otherwise, return nil.
245 A file name is handled if one of the regular expressions in
246 `file-name-handler-alist' matches it.
248 If OPERATION equals `inhibit-file-name-operation', then we ignore
249 any handlers that are members of `inhibit-file-name-handlers',
250 but we still do run any other handlers. This lets handlers
251 use the standard functions without calling themselves recursively. */)
252 (Lisp_Object filename
, Lisp_Object operation
)
254 /* This function must not munge the match data. */
255 Lisp_Object chain
, inhibited_handlers
, result
;
259 CHECK_STRING (filename
);
261 if (EQ (operation
, Vinhibit_file_name_operation
))
262 inhibited_handlers
= Vinhibit_file_name_handlers
;
264 inhibited_handlers
= Qnil
;
266 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
267 chain
= XCDR (chain
))
273 Lisp_Object string
= XCAR (elt
);
275 Lisp_Object handler
= XCDR (elt
);
276 Lisp_Object operations
= Qnil
;
278 if (SYMBOLP (handler
))
279 operations
= Fget (handler
, Qoperations
);
282 && (match_pos
= fast_string_match (string
, filename
)) > pos
283 && (NILP (operations
) || ! NILP (Fmemq (operation
, operations
))))
287 handler
= XCDR (elt
);
288 tem
= Fmemq (handler
, inhibited_handlers
);
302 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
304 doc
: /* Return the directory component in file name FILENAME.
305 Return nil if FILENAME does not include a directory.
306 Otherwise return a directory name.
307 Given a Unix syntax file name, returns a string ending in slash. */)
308 (Lisp_Object filename
)
311 register const char *beg
;
315 register const char *p
;
318 CHECK_STRING (filename
);
320 /* If the file name has special constructs in it,
321 call the corresponding file handler. */
322 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
324 return call2 (handler
, Qfile_name_directory
, filename
);
326 filename
= FILE_SYSTEM_CASE (filename
);
328 beg
= (char *) alloca (SBYTES (filename
) + 1);
329 memcpy (beg
, SSDATA (filename
), SBYTES (filename
) + 1);
331 beg
= SSDATA (filename
);
333 p
= beg
+ SBYTES (filename
);
335 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
337 /* only recognise drive specifier at the beginning */
339 /* handle the "/:d:foo" and "/:foo" cases correctly */
340 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
341 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
348 /* Expansion of "c:" to drive and default directory. */
351 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
352 char *res
= alloca (MAXPATHLEN
+ 1);
355 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
357 strncpy (res
, beg
, 2);
362 if (getdefdir (toupper ((unsigned char) *beg
) - 'A' + 1, r
))
364 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
367 p
= beg
+ strlen (beg
);
370 dostounix_filename (beg
);
373 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
376 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
377 Sfile_name_nondirectory
, 1, 1, 0,
378 doc
: /* Return file name FILENAME sans its directory.
379 For example, in a Unix-syntax file name,
380 this is everything after the last slash,
381 or the entire name if it contains no slash. */)
382 (Lisp_Object filename
)
384 register const char *beg
, *p
, *end
;
387 CHECK_STRING (filename
);
389 /* If the file name has special constructs in it,
390 call the corresponding file handler. */
391 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
393 return call2 (handler
, Qfile_name_nondirectory
, filename
);
395 beg
= SSDATA (filename
);
396 end
= p
= beg
+ SBYTES (filename
);
398 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
400 /* only recognise drive specifier at beginning */
402 /* handle the "/:d:foo" case correctly */
403 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
408 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
411 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
412 Sunhandled_file_name_directory
, 1, 1, 0,
413 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
414 A `directly usable' directory name is one that may be used without the
415 intervention of any file handler.
416 If FILENAME is a directly usable file itself, return
417 \(file-name-directory FILENAME).
418 If FILENAME refers to a file which is not accessible from a local process,
419 then this should return nil.
420 The `call-process' and `start-process' functions use this function to
421 get a current directory to run processes in. */)
422 (Lisp_Object filename
)
426 /* If the file name has special constructs in it,
427 call the corresponding file handler. */
428 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
430 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
432 return Ffile_name_directory (filename
);
437 file_name_as_directory (char *out
, const char *in
)
439 int size
= strlen (in
) - 1;
451 /* For Unix syntax, Append a slash if necessary */
452 if (!IS_DIRECTORY_SEP (out
[size
]))
454 out
[size
+ 1] = DIRECTORY_SEP
;
455 out
[size
+ 2] = '\0';
458 dostounix_filename (out
);
463 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
464 Sfile_name_as_directory
, 1, 1, 0,
465 doc
: /* Return a string representing the file name FILE interpreted as a directory.
466 This operation exists because a directory is also a file, but its name as
467 a directory is different from its name as a file.
468 The result can be used as the value of `default-directory'
469 or passed as second argument to `expand-file-name'.
470 For a Unix-syntax file name, just appends a slash. */)
480 /* If the file name has special constructs in it,
481 call the corresponding file handler. */
482 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
484 return call2 (handler
, Qfile_name_as_directory
, file
);
486 buf
= (char *) alloca (SBYTES (file
) + 10);
487 file_name_as_directory (buf
, SSDATA (file
));
488 return make_specified_string (buf
, -1, strlen (buf
),
489 STRING_MULTIBYTE (file
));
493 * Convert from directory name to filename.
494 * On UNIX, it's simple: just make sure there isn't a terminating /
496 * Value is nonzero if the string output is different from the input.
500 directory_file_name (char *src
, char *dst
)
506 /* Process as Unix format: just remove any final slash.
507 But leave "/" unchanged; do not change it to "". */
510 && IS_DIRECTORY_SEP (dst
[slen
- 1])
512 && !IS_ANY_SEP (dst
[slen
- 2])
517 dostounix_filename (dst
);
522 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
524 doc
: /* Returns the file name of the directory named DIRECTORY.
525 This is the name of the file that holds the data for the directory DIRECTORY.
526 This operation exists because a directory is also a file, but its name as
527 a directory is different from its name as a file.
528 In Unix-syntax, this function just removes the final slash. */)
529 (Lisp_Object directory
)
534 CHECK_STRING (directory
);
536 if (NILP (directory
))
539 /* If the file name has special constructs in it,
540 call the corresponding file handler. */
541 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
543 return call2 (handler
, Qdirectory_file_name
, directory
);
545 buf
= (char *) alloca (SBYTES (directory
) + 20);
546 directory_file_name (SSDATA (directory
), buf
);
547 return make_specified_string (buf
, -1, strlen (buf
),
548 STRING_MULTIBYTE (directory
));
551 static const char make_temp_name_tbl
[64] =
553 'A','B','C','D','E','F','G','H',
554 'I','J','K','L','M','N','O','P',
555 'Q','R','S','T','U','V','W','X',
556 'Y','Z','a','b','c','d','e','f',
557 'g','h','i','j','k','l','m','n',
558 'o','p','q','r','s','t','u','v',
559 'w','x','y','z','0','1','2','3',
560 '4','5','6','7','8','9','-','_'
563 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
565 /* Value is a temporary file name starting with PREFIX, a string.
567 The Emacs process number forms part of the result, so there is
568 no danger of generating a name being used by another process.
569 In addition, this function makes an attempt to choose a name
570 which has no existing file. To make this work, PREFIX should be
571 an absolute file name.
573 BASE64_P non-zero means add the pid as 3 characters in base64
574 encoding. In this case, 6 characters will be added to PREFIX to
575 form the file name. Otherwise, if Emacs is running on a system
576 with long file names, add the pid as a decimal number.
578 This function signals an error if no unique file name could be
582 make_temp_name (Lisp_Object prefix
, int base64_p
)
591 CHECK_STRING (prefix
);
593 /* VAL is created by adding 6 characters to PREFIX. The first
594 three are the PID of this process, in base 64, and the second
595 three are incremented if the file already exists. This ensures
596 262144 unique file names per PID per PREFIX. */
598 pid
= (int) getpid ();
602 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
603 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
604 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
609 #ifdef HAVE_LONG_FILE_NAMES
610 sprintf (pidbuf
, "%d", pid
);
611 pidlen
= strlen (pidbuf
);
613 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
614 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
615 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
620 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
621 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
622 if (!STRING_MULTIBYTE (prefix
))
623 STRING_SET_UNIBYTE (val
);
625 memcpy (data
, SSDATA (prefix
), len
);
628 memcpy (p
, pidbuf
, pidlen
);
631 /* Here we try to minimize useless stat'ing when this function is
632 invoked many times successively with the same PREFIX. We achieve
633 this by initializing count to a random value, and incrementing it
636 We don't want make-temp-name to be called while dumping,
637 because then make_temp_name_count_initialized_p would get set
638 and then make_temp_name_count would not be set when Emacs starts. */
640 if (!make_temp_name_count_initialized_p
)
642 make_temp_name_count
= (unsigned) time (NULL
);
643 make_temp_name_count_initialized_p
= 1;
649 unsigned num
= make_temp_name_count
;
651 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
652 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
653 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
655 /* Poor man's congruential RN generator. Replace with
656 ++make_temp_name_count for debugging. */
657 make_temp_name_count
+= 25229;
658 make_temp_name_count
%= 225307;
660 if (stat (data
, &ignored
) < 0)
662 /* We want to return only if errno is ENOENT. */
666 /* The error here is dubious, but there is little else we
667 can do. The alternatives are to return nil, which is
668 as bad as (and in many cases worse than) throwing the
669 error, or to ignore the error, which will likely result
670 in looping through 225307 stat's, which is not only
671 dog-slow, but also useless since eventually nil would
672 have to be returned anyway. */
673 report_file_error ("Cannot create temporary name for prefix",
674 Fcons (prefix
, Qnil
));
681 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
682 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
683 The Emacs process number forms part of the result,
684 so there is no danger of generating a name being used by another process.
686 In addition, this function makes an attempt to choose a name
687 which has no existing file. To make this work,
688 PREFIX should be an absolute file name.
690 There is a race condition between calling `make-temp-name' and creating the
691 file which opens all kinds of security holes. For that reason, you should
692 probably use `make-temp-file' instead, except in three circumstances:
694 * If you are creating the file in the user's home directory.
695 * If you are creating a directory rather than an ordinary file.
696 * If you are taking special precautions as `make-temp-file' does. */)
699 return make_temp_name (prefix
, 0);
704 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
705 doc
: /* Convert filename NAME to absolute, and canonicalize it.
706 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
707 \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing,
708 the current buffer's value of `default-directory' is used.
709 NAME should be a string that is a valid file name for the underlying
711 File name components that are `.' are removed, and
712 so are file name components followed by `..', along with the `..' itself;
713 note that these simplifications are done without checking the resulting
714 file names in the file system.
715 Multiple consecutive slashes are collapsed into a single slash,
716 except at the beginning of the file name when they are significant (e.g.,
717 UNC file names on MS-Windows.)
718 An initial `~/' expands to your home directory.
719 An initial `~USER/' expands to USER's home directory.
720 See also the function `substitute-in-file-name'.
722 For technical reasons, this function can return correct but
723 non-intuitive results for the root directory; for instance,
724 \(expand-file-name ".." "/") returns "/..". For this reason, use
725 \(directory-file-name (file-name-directory dirname)) to traverse a
726 filesystem tree, not (expand-file-name ".." dirname). */)
727 (Lisp_Object name
, Lisp_Object default_directory
)
729 /* These point to SDATA and need to be careful with string-relocation
730 during GC (via DECODE_FILE). */
733 /* This should only point to alloca'd data. */
740 int collapse_newdir
= 1;
744 Lisp_Object handler
, result
;
750 /* If the file name has special constructs in it,
751 call the corresponding file handler. */
752 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
754 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
756 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
757 if (NILP (default_directory
))
758 default_directory
= BVAR (current_buffer
, directory
);
759 if (! STRINGP (default_directory
))
762 /* "/" is not considered a root directory on DOS_NT, so using "/"
763 here causes an infinite recursion in, e.g., the following:
765 (let (default-directory)
766 (expand-file-name "a"))
768 To avoid this, we set default_directory to the root of the
770 default_directory
= build_string (emacs_root_dir ());
772 default_directory
= build_string ("/");
776 if (!NILP (default_directory
))
778 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
780 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
784 char *o
= SSDATA (default_directory
);
786 /* Make sure DEFAULT_DIRECTORY is properly expanded.
787 It would be better to do this down below where we actually use
788 default_directory. Unfortunately, calling Fexpand_file_name recursively
789 could invoke GC, and the strings might be relocated. This would
790 be annoying because we have pointers into strings lying around
791 that would need adjusting, and people would add new pointers to
792 the code and forget to adjust them, resulting in intermittent bugs.
793 Putting this call here avoids all that crud.
795 The EQ test avoids infinite recursion. */
796 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
797 /* Save time in some common cases - as long as default_directory
798 is not relative, it can be canonicalized with name below (if it
799 is needed at all) without requiring it to be expanded now. */
801 /* Detect MSDOS file names with drive specifiers. */
802 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1])
803 && IS_DIRECTORY_SEP (o
[2]))
805 /* Detect Windows file names in UNC format. */
806 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
808 #else /* not DOS_NT */
809 /* Detect Unix absolute file names (/... alone is not absolute on
811 && ! (IS_DIRECTORY_SEP (o
[0]))
812 #endif /* not DOS_NT */
818 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
822 name
= FILE_SYSTEM_CASE (name
);
823 multibyte
= STRING_MULTIBYTE (name
);
824 if (multibyte
!= STRING_MULTIBYTE (default_directory
))
827 default_directory
= string_to_multibyte (default_directory
);
830 name
= string_to_multibyte (name
);
835 /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */
836 nm
= (char *) alloca (SBYTES (name
) + 1);
837 memcpy (nm
, SSDATA (name
), SBYTES (name
) + 1);
840 /* Note if special escape prefix is present, but remove for now. */
841 if (nm
[0] == '/' && nm
[1] == ':')
847 /* Find and remove drive specifier if present; this makes nm absolute
848 even if the rest of the name appears to be relative. Only look for
849 drive specifier at the beginning. */
850 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
852 drive
= (unsigned char) nm
[0];
857 /* If we see "c://somedir", we want to strip the first slash after the
858 colon when stripping the drive letter. Otherwise, this expands to
860 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
863 /* Discard any previous drive specifier if nm is now in UNC format. */
864 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
868 #endif /* WINDOWSNT */
871 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
872 none are found, we can probably return right away. We will avoid
873 allocating a new string if name is already fully expanded. */
875 IS_DIRECTORY_SEP (nm
[0])
877 && drive
&& !is_escaped
880 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
884 /* If it turns out that the filename we want to return is just a
885 suffix of FILENAME, we don't need to go through and edit
886 things; we just need to construct a new string using data
887 starting at the middle of FILENAME. If we set lose to a
888 non-zero value, that means we've discovered that we can't do
895 /* Since we know the name is absolute, we can assume that each
896 element starts with a "/". */
898 /* "." and ".." are hairy. */
899 if (IS_DIRECTORY_SEP (p
[0])
901 && (IS_DIRECTORY_SEP (p
[2])
903 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
906 /* We want to replace multiple `/' in a row with a single
909 && IS_DIRECTORY_SEP (p
[0])
910 && IS_DIRECTORY_SEP (p
[1]))
917 /* Make sure directories are all separated with /, but
918 avoid allocation of a new string when not required. */
919 dostounix_filename (nm
);
921 if (IS_DIRECTORY_SEP (nm
[1]))
923 if (strcmp (nm
, SSDATA (name
)) != 0)
924 name
= make_specified_string (nm
, -1, strlen (nm
), multibyte
);
928 /* drive must be set, so this is okay */
929 if (strcmp (nm
- 2, SSDATA (name
)) != 0)
933 name
= make_specified_string (nm
, -1, p
- nm
, multibyte
);
934 temp
[0] = DRIVE_LETTER (drive
);
935 name
= concat2 (build_string (temp
), name
);
938 #else /* not DOS_NT */
939 if (strcmp (nm
, SSDATA (name
)) == 0)
941 return make_specified_string (nm
, -1, strlen (nm
), multibyte
);
942 #endif /* not DOS_NT */
946 /* At this point, nm might or might not be an absolute file name. We
947 need to expand ~ or ~user if present, otherwise prefix nm with
948 default_directory if nm is not absolute, and finally collapse /./
949 and /foo/../ sequences.
951 We set newdir to be the appropriate prefix if one is needed:
952 - the relevant user directory if nm starts with ~ or ~user
953 - the specified drive's working dir (DOS/NT only) if nm does not
955 - the value of default_directory.
957 Note that these prefixes are not guaranteed to be absolute (except
958 for the working dir of a drive). Therefore, to ensure we always
959 return an absolute name, if the final prefix is not absolute we
960 append it to the current working directory. */
964 if (nm
[0] == '~') /* prefix ~ */
966 if (IS_DIRECTORY_SEP (nm
[1])
967 || nm
[1] == 0) /* ~ by itself */
971 if (!(newdir
= egetenv ("HOME")))
974 /* egetenv may return a unibyte string, which will bite us since
975 we expect the directory to be multibyte. */
976 tem
= build_string (newdir
);
977 if (!STRING_MULTIBYTE (tem
))
979 hdir
= DECODE_FILE (tem
);
980 newdir
= SSDATA (hdir
);
986 else /* ~user/filename */
989 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)); p
++);
990 o
= alloca (p
- nm
+ 1);
991 memcpy (o
, nm
, p
- nm
);
995 pw
= (struct passwd
*) getpwnam (o
+ 1);
1002 collapse_newdir
= 0;
1006 /* If we don't find a user of that name, leave the name
1007 unchanged; don't move nm forward to p. */
1012 /* On DOS and Windows, nm is absolute if a drive name was specified;
1013 use the drive's current directory as the prefix if needed. */
1014 if (!newdir
&& drive
)
1016 /* Get default directory if needed to make nm absolute. */
1018 if (!IS_DIRECTORY_SEP (nm
[0]))
1020 adir
= alloca (MAXPATHLEN
+ 1);
1021 if (!getdefdir (toupper (drive
) - 'A' + 1, adir
))
1026 /* Either nm starts with /, or drive isn't mounted. */
1028 adir
[0] = DRIVE_LETTER (drive
);
1037 /* Finally, if no prefix has been specified and nm is not absolute,
1038 then it must be expanded relative to default_directory. */
1042 /* /... alone is not absolute on DOS and Windows. */
1043 && !IS_DIRECTORY_SEP (nm
[0])
1046 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1050 newdir
= SSDATA (default_directory
);
1052 /* Note if special escape prefix is present, but remove for now. */
1053 if (newdir
[0] == '/' && newdir
[1] == ':')
1064 /* First ensure newdir is an absolute name. */
1066 /* Detect MSDOS file names with drive specifiers. */
1067 ! (IS_DRIVE (newdir
[0])
1068 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1070 /* Detect Windows file names in UNC format. */
1071 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1075 /* Effectively, let newdir be (expand-file-name newdir cwd).
1076 Because of the admonition against calling expand-file-name
1077 when we have pointers into lisp strings, we accomplish this
1078 indirectly by prepending newdir to nm if necessary, and using
1079 cwd (or the wd of newdir's drive) as the new newdir. */
1081 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1083 drive
= (unsigned char) newdir
[0];
1086 if (!IS_DIRECTORY_SEP (nm
[0]))
1088 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1089 file_name_as_directory (tmp
, newdir
);
1093 adir
= alloca (MAXPATHLEN
+ 1);
1096 if (!getdefdir (toupper (drive
) - 'A' + 1, adir
))
1104 /* Strip off drive name from prefix, if present. */
1105 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1111 /* Keep only a prefix from newdir if nm starts with slash
1112 (//server/share for UNC, nothing otherwise). */
1113 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1116 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1118 char *adir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1120 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1122 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1135 /* Get rid of any slash at the end of newdir, unless newdir is
1136 just / or // (an incomplete UNC name). */
1137 length
= strlen (newdir
);
1138 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1140 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1144 char *temp
= (char *) alloca (length
);
1145 memcpy (temp
, newdir
, length
- 1);
1146 temp
[length
- 1] = 0;
1154 /* Now concatenate the directory and name to new space in the stack frame */
1155 tlen
+= strlen (nm
) + 1;
1157 /* Reserve space for drive specifier and escape prefix, since either
1158 or both may need to be inserted. (The Microsoft x86 compiler
1159 produces incorrect code if the following two lines are combined.) */
1160 target
= (char *) alloca (tlen
+ 4);
1162 #else /* not DOS_NT */
1163 target
= (char *) alloca (tlen
);
1164 #endif /* not DOS_NT */
1169 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1172 /* If newdir is effectively "C:/", then the drive letter will have
1173 been stripped and newdir will be "/". Concatenating with an
1174 absolute directory in nm produces "//", which will then be
1175 incorrectly treated as a network share. Ignore newdir in
1176 this case (keeping the drive letter). */
1177 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1178 && newdir
[1] == '\0'))
1180 strcpy (target
, newdir
);
1183 file_name_as_directory (target
, newdir
);
1186 strcat (target
, nm
);
1188 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1196 if (!IS_DIRECTORY_SEP (*p
))
1200 else if (p
[1] == '.'
1201 && (IS_DIRECTORY_SEP (p
[2])
1204 /* If "/." is the entire filename, keep the "/". Otherwise,
1205 just delete the whole "/.". */
1206 if (o
== target
&& p
[2] == '\0')
1210 else if (p
[1] == '.' && p
[2] == '.'
1211 /* `/../' is the "superroot" on certain file systems.
1212 Turned off on DOS_NT systems because they have no
1213 "superroot" and because this causes us to produce
1214 file names like "d:/../foo" which fail file-related
1215 functions of the underlying OS. (To reproduce, try a
1216 long series of "../../" in default_directory, longer
1217 than the number of levels from the root.) */
1221 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1226 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1229 /* Don't go below server level in UNC filenames. */
1230 if (o
== target
+ 1 && IS_DIRECTORY_SEP (*o
)
1231 && IS_DIRECTORY_SEP (*target
))
1235 /* Keep initial / only if this is the whole name. */
1236 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1240 else if (p
> target
&& IS_DIRECTORY_SEP (p
[1]))
1241 /* Collapse multiple `/' in a row. */
1250 /* At last, set drive name. */
1252 /* Except for network file name. */
1253 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1254 #endif /* WINDOWSNT */
1256 if (!drive
) abort ();
1258 target
[0] = DRIVE_LETTER (drive
);
1261 /* Reinsert the escape prefix if required. */
1268 dostounix_filename (target
);
1271 result
= make_specified_string (target
, -1, o
- target
, multibyte
);
1274 /* Again look to see if the file name has special constructs in it
1275 and perhaps call the corresponding file handler. This is needed
1276 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1277 the ".." component gives us "/user@host:/bar/../baz" which needs
1278 to be expanded again. */
1279 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1280 if (!NILP (handler
))
1281 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1287 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1288 This is the old version of expand-file-name, before it was thoroughly
1289 rewritten for Emacs 10.31. We leave this version here commented-out,
1290 because the code is very complex and likely to have subtle bugs. If
1291 bugs _are_ found, it might be of interest to look at the old code and
1292 see what did it do in the relevant situation.
1294 Don't remove this code: it's true that it will be accessible
1295 from the repository, but a few years from deletion, people will
1296 forget it is there. */
1298 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1299 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1300 "Convert FILENAME to absolute, and canonicalize it.\n\
1301 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1302 \(does not start with slash); if DEFAULT is nil or missing,\n\
1303 the current buffer's value of default-directory is used.\n\
1304 Filenames containing `.' or `..' as components are simplified;\n\
1305 initial `~/' expands to your home directory.\n\
1306 See also the function `substitute-in-file-name'.")
1308 Lisp_Object name
, defalt
;
1312 register unsigned char *newdir
, *p
, *o
;
1314 unsigned char *target
;
1318 CHECK_STRING (name
);
1321 /* If nm is absolute, flush ...// and detect /./ and /../.
1322 If no /./ or /../ we can return right away. */
1329 if (p
[0] == '/' && p
[1] == '/'
1332 if (p
[0] == '/' && p
[1] == '~')
1333 nm
= p
+ 1, lose
= 1;
1334 if (p
[0] == '/' && p
[1] == '.'
1335 && (p
[2] == '/' || p
[2] == 0
1336 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1342 if (nm
== SDATA (name
))
1344 return build_string (nm
);
1348 /* Now determine directory to start with and put it in NEWDIR */
1352 if (nm
[0] == '~') /* prefix ~ */
1353 if (nm
[1] == '/' || nm
[1] == 0)/* ~/filename */
1355 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1356 newdir
= (unsigned char *) "";
1359 else /* ~user/filename */
1361 /* Get past ~ to user */
1362 unsigned char *user
= nm
+ 1;
1363 /* Find end of name. */
1364 unsigned char *ptr
= (unsigned char *) strchr (user
, '/');
1365 int len
= ptr
? ptr
- user
: strlen (user
);
1366 /* Copy the user name into temp storage. */
1367 o
= (unsigned char *) alloca (len
+ 1);
1368 memcpy (o
, user
, len
);
1371 /* Look up the user name. */
1373 pw
= (struct passwd
*) getpwnam (o
+ 1);
1376 error ("\"%s\" isn't a registered user", o
+ 1);
1378 newdir
= (unsigned char *) pw
->pw_dir
;
1380 /* Discard the user name from NM. */
1384 if (nm
[0] != '/' && !newdir
)
1387 defalt
= current_buffer
->directory
;
1388 CHECK_STRING (defalt
);
1389 newdir
= SDATA (defalt
);
1392 /* Now concatenate the directory and name to new space in the stack frame */
1394 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1395 target
= (unsigned char *) alloca (tlen
);
1400 if (nm
[0] == 0 || nm
[0] == '/')
1401 strcpy (target
, newdir
);
1403 file_name_as_directory (target
, newdir
);
1406 strcat (target
, nm
);
1408 /* Now canonicalize by removing /. and /foo/.. if they appear */
1419 else if (!strncmp (p
, "//", 2)
1425 else if (p
[0] == '/' && p
[1] == '.'
1426 && (p
[2] == '/' || p
[2] == 0))
1428 else if (!strncmp (p
, "/..", 3)
1429 /* `/../' is the "superroot" on certain file systems. */
1431 && (p
[3] == '/' || p
[3] == 0))
1433 while (o
!= target
&& *--o
!= '/')
1435 if (o
== target
&& *o
== '/')
1445 return make_string (target
, o
- target
);
1449 /* If /~ or // appears, discard everything through first slash. */
1451 file_name_absolute_p (const char *filename
)
1454 (IS_DIRECTORY_SEP (*filename
) || *filename
== '~'
1456 || (IS_DRIVE (*filename
) && IS_DEVICE_SEP (filename
[1])
1457 && IS_DIRECTORY_SEP (filename
[2]))
1463 search_embedded_absfilename (char *nm
, char *endp
)
1467 for (p
= nm
+ 1; p
< endp
; p
++)
1470 || IS_DIRECTORY_SEP (p
[-1]))
1471 && file_name_absolute_p (p
)
1472 #if defined (WINDOWSNT) || defined(CYGWIN)
1473 /* // at start of file name is meaningful in Apollo,
1474 WindowsNT and Cygwin systems. */
1475 && !(IS_DIRECTORY_SEP (p
[0]) && p
- 1 == nm
)
1476 #endif /* not (WINDOWSNT || CYGWIN) */
1479 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)); s
++);
1480 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
1482 char *o
= alloca (s
- p
+ 1);
1484 memcpy (o
, p
, s
- p
);
1487 /* If we have ~user and `user' exists, discard
1488 everything up to ~. But if `user' does not exist, leave
1489 ~user alone, it might be a literal file name. */
1491 pw
= getpwnam (o
+ 1);
1503 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
1504 Ssubstitute_in_file_name
, 1, 1, 0,
1505 doc
: /* Substitute environment variables referred to in FILENAME.
1506 `$FOO' where FOO is an environment variable name means to substitute
1507 the value of that variable. The variable name should be terminated
1508 with a character not a letter, digit or underscore; otherwise, enclose
1509 the entire variable name in braces.
1511 If `/~' appears, all of FILENAME through that `/' is discarded.
1512 If `//' appears, everything up to and including the first of
1513 those `/' is discarded. */)
1514 (Lisp_Object filename
)
1518 register char *s
, *p
, *o
, *x
, *endp
;
1519 char *target
= NULL
;
1521 int substituted
= 0;
1524 Lisp_Object handler
;
1526 CHECK_STRING (filename
);
1528 multibyte
= STRING_MULTIBYTE (filename
);
1530 /* If the file name has special constructs in it,
1531 call the corresponding file handler. */
1532 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
1533 if (!NILP (handler
))
1534 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
1536 /* Always work on a copy of the string, in case GC happens during
1537 decode of environment variables, causing the original Lisp_String
1538 data to be relocated. */
1539 nm
= (char *) alloca (SBYTES (filename
) + 1);
1540 memcpy (nm
, SDATA (filename
), SBYTES (filename
) + 1);
1543 dostounix_filename (nm
);
1544 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
1546 endp
= nm
+ SBYTES (filename
);
1548 /* If /~ or // appears, discard everything through first slash. */
1549 p
= search_embedded_absfilename (nm
, endp
);
1551 /* Start over with the new string, so we check the file-name-handler
1552 again. Important with filenames like "/home/foo//:/hello///there"
1553 which whould substitute to "/:/hello///there" rather than "/there". */
1554 return Fsubstitute_in_file_name
1555 (make_specified_string (p
, -1, endp
- p
, multibyte
));
1557 /* See if any variables are substituted into the string
1558 and find the total length of their values in `total' */
1560 for (p
= nm
; p
!= endp
;)
1570 /* "$$" means a single "$" */
1579 while (p
!= endp
&& *p
!= '}') p
++;
1580 if (*p
!= '}') goto missingclose
;
1586 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
1590 /* Copy out the variable name */
1591 target
= (char *) alloca (s
- o
+ 1);
1592 strncpy (target
, o
, s
- o
);
1595 strupr (target
); /* $home == $HOME etc. */
1598 /* Get variable value */
1599 o
= egetenv (target
);
1602 /* Don't try to guess a maximum length - UTF8 can use up to
1603 four bytes per character. This code is unlikely to run
1604 in a situation that requires performance, so decoding the
1605 env variables twice should be acceptable. Note that
1606 decoding may cause a garbage collect. */
1607 Lisp_Object orig
, decoded
;
1608 orig
= make_unibyte_string (o
, strlen (o
));
1609 decoded
= DECODE_FILE (orig
);
1610 total
+= SBYTES (decoded
);
1620 /* If substitution required, recopy the string and do it */
1621 /* Make space in stack frame for the new copy */
1622 xnm
= (char *) alloca (SBYTES (filename
) + total
+ 1);
1625 /* Copy the rest of the name through, replacing $ constructs with values */
1642 while (p
!= endp
&& *p
!= '}') p
++;
1643 if (*p
!= '}') goto missingclose
;
1649 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
1653 /* Copy out the variable name */
1654 target
= (char *) alloca (s
- o
+ 1);
1655 strncpy (target
, o
, s
- o
);
1658 strupr (target
); /* $home == $HOME etc. */
1661 /* Get variable value */
1662 o
= egetenv (target
);
1666 strcpy (x
, target
); x
+= strlen (target
);
1670 Lisp_Object orig
, decoded
;
1671 int orig_length
, decoded_length
;
1672 orig_length
= strlen (o
);
1673 orig
= make_unibyte_string (o
, orig_length
);
1674 decoded
= DECODE_FILE (orig
);
1675 decoded_length
= SBYTES (decoded
);
1676 strncpy (x
, SSDATA (decoded
), decoded_length
);
1677 x
+= decoded_length
;
1679 /* If environment variable needed decoding, return value
1680 needs to be multibyte. */
1681 if (decoded_length
!= orig_length
1682 || strncmp (SSDATA (decoded
), o
, orig_length
))
1689 /* If /~ or // appears, discard everything through first slash. */
1690 while ((p
= search_embedded_absfilename (xnm
, x
)))
1691 /* This time we do not start over because we've already expanded envvars
1692 and replaced $$ with $. Maybe we should start over as well, but we'd
1693 need to quote some $ to $$ first. */
1696 return make_specified_string (xnm
, -1, x
- xnm
, multibyte
);
1699 error ("Bad format environment-variable substitution");
1701 error ("Missing \"}\" in environment-variable substitution");
1703 error ("Substituting nonexistent environment variable \"%s\"", target
);
1709 /* A slightly faster and more convenient way to get
1710 (directory-file-name (expand-file-name FOO)). */
1713 expand_and_dir_to_file (Lisp_Object filename
, Lisp_Object defdir
)
1715 register Lisp_Object absname
;
1717 absname
= Fexpand_file_name (filename
, defdir
);
1719 /* Remove final slash, if any (unless this is the root dir).
1720 stat behaves differently depending! */
1721 if (SCHARS (absname
) > 1
1722 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
1723 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
1724 /* We cannot take shortcuts; they might be wrong for magic file names. */
1725 absname
= Fdirectory_file_name (absname
);
1729 /* Signal an error if the file ABSNAME already exists.
1730 If INTERACTIVE is nonzero, ask the user whether to proceed,
1731 and bypass the error if the user says to go ahead.
1732 QUERYSTRING is a name for the action that is being considered
1735 *STATPTR is used to store the stat information if the file exists.
1736 If the file does not exist, STATPTR->st_mode is set to 0.
1737 If STATPTR is null, we don't store into it.
1739 If QUICK is nonzero, we ask for y or n, not yes or no. */
1742 barf_or_query_if_file_exists (Lisp_Object absname
, const char *querystring
,
1743 int interactive
, struct stat
*statptr
, int quick
)
1745 register Lisp_Object tem
, encoded_filename
;
1746 struct stat statbuf
;
1747 struct gcpro gcpro1
;
1749 encoded_filename
= ENCODE_FILE (absname
);
1751 /* stat is a good way to tell whether the file exists,
1752 regardless of what access permissions it has. */
1753 if (lstat (SSDATA (encoded_filename
), &statbuf
) >= 0)
1756 xsignal2 (Qfile_already_exists
,
1757 build_string ("File already exists"), absname
);
1759 tem
= format2 ("File %s already exists; %s anyway? ",
1760 absname
, build_string (querystring
));
1762 tem
= call1 (intern ("y-or-n-p"), tem
);
1764 tem
= do_yes_or_no_p (tem
);
1767 xsignal2 (Qfile_already_exists
,
1768 build_string ("File already exists"), absname
);
1775 statptr
->st_mode
= 0;
1780 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 6,
1781 "fCopy file: \nGCopy %s to file: \np\nP",
1782 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
1783 If NEWNAME names a directory, copy FILE there.
1785 This function always sets the file modes of the output file to match
1788 The optional third argument OK-IF-ALREADY-EXISTS specifies what to do
1789 if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we
1790 signal a `file-already-exists' error without overwriting. If
1791 OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user
1792 about overwriting; this is what happens in interactive use with M-x.
1793 Any other value for OK-IF-ALREADY-EXISTS means to overwrite the
1796 Fourth arg KEEP-TIME non-nil means give the output file the same
1797 last-modified time as the old one. (This works on only some systems.)
1799 A prefix arg makes KEEP-TIME non-nil.
1801 If PRESERVE-UID-GID is non-nil, we try to transfer the
1802 uid and gid of FILE to NEWNAME.
1804 If PRESERVE-SELINUX-CONTEXT is non-nil and SELinux is enabled
1805 on the system, we copy the SELinux context of FILE to NEWNAME. */)
1806 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
, Lisp_Object keep_time
, Lisp_Object preserve_uid_gid
, Lisp_Object preserve_selinux_context
)
1809 char buf
[16 * 1024];
1810 struct stat st
, out_st
;
1811 Lisp_Object handler
;
1812 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1813 int count
= SPECPDL_INDEX ();
1814 int input_file_statable_p
;
1815 Lisp_Object encoded_file
, encoded_newname
;
1817 security_context_t con
;
1818 int fail
, conlength
= 0;
1821 encoded_file
= encoded_newname
= Qnil
;
1822 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
1823 CHECK_STRING (file
);
1824 CHECK_STRING (newname
);
1826 if (!NILP (Ffile_directory_p (newname
)))
1827 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
1829 newname
= Fexpand_file_name (newname
, Qnil
);
1831 file
= Fexpand_file_name (file
, Qnil
);
1833 /* If the input file name has special constructs in it,
1834 call the corresponding file handler. */
1835 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
1836 /* Likewise for output file name. */
1838 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
1839 if (!NILP (handler
))
1840 RETURN_UNGCPRO (call7 (handler
, Qcopy_file
, file
, newname
,
1841 ok_if_already_exists
, keep_time
, preserve_uid_gid
,
1842 preserve_selinux_context
));
1844 encoded_file
= ENCODE_FILE (file
);
1845 encoded_newname
= ENCODE_FILE (newname
);
1847 if (NILP (ok_if_already_exists
)
1848 || INTEGERP (ok_if_already_exists
))
1849 barf_or_query_if_file_exists (newname
, "copy to it",
1850 INTEGERP (ok_if_already_exists
), &out_st
, 0);
1851 else if (stat (SSDATA (encoded_newname
), &out_st
) < 0)
1855 if (!CopyFile (SDATA (encoded_file
),
1856 SDATA (encoded_newname
),
1858 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
1859 /* CopyFile retains the timestamp by default. */
1860 else if (NILP (keep_time
))
1866 EMACS_GET_TIME (now
);
1867 filename
= SDATA (encoded_newname
);
1869 /* Ensure file is writable while its modified time is set. */
1870 attributes
= GetFileAttributes (filename
);
1871 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
1872 if (set_file_times (filename
, now
, now
))
1874 /* Restore original attributes. */
1875 SetFileAttributes (filename
, attributes
);
1876 xsignal2 (Qfile_date_error
,
1877 build_string ("Cannot set file date"), newname
);
1879 /* Restore original attributes. */
1880 SetFileAttributes (filename
, attributes
);
1882 #else /* not WINDOWSNT */
1884 ifd
= emacs_open (SSDATA (encoded_file
), O_RDONLY
, 0);
1888 report_file_error ("Opening input file", Fcons (file
, Qnil
));
1890 record_unwind_protect (close_file_unwind
, make_number (ifd
));
1892 /* We can only copy regular files and symbolic links. Other files are not
1894 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
1897 if (!NILP (preserve_selinux_context
) && is_selinux_enabled ())
1899 conlength
= fgetfilecon (ifd
, &con
);
1900 if (conlength
== -1)
1901 report_file_error ("Doing fgetfilecon", Fcons (file
, Qnil
));
1905 if (out_st
.st_mode
!= 0
1906 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
1909 report_file_error ("Input and output files are the same",
1910 Fcons (file
, Fcons (newname
, Qnil
)));
1913 if (input_file_statable_p
)
1915 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
1917 #if defined (EISDIR)
1918 /* Get a better looking error message. */
1921 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
1926 /* System's default file type was set to binary by _fmode in emacs.c. */
1927 ofd
= emacs_open (SDATA (encoded_newname
),
1928 O_WRONLY
| O_TRUNC
| O_CREAT
1929 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0),
1930 S_IREAD
| S_IWRITE
);
1931 #else /* not MSDOS */
1932 ofd
= emacs_open (SSDATA (encoded_newname
),
1933 O_WRONLY
| O_TRUNC
| O_CREAT
1934 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0),
1936 #endif /* not MSDOS */
1938 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
1940 record_unwind_protect (close_file_unwind
, make_number (ofd
));
1944 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
1945 if (emacs_write (ofd
, buf
, n
) != n
)
1946 report_file_error ("I/O error", Fcons (newname
, Qnil
));
1950 /* Preserve the original file modes, and if requested, also its
1952 if (input_file_statable_p
)
1954 if (!NILP (preserve_uid_gid
) && fchown (ofd
, st
.st_uid
, st
.st_gid
) != 0)
1955 report_file_error ("Doing chown", Fcons (newname
, Qnil
));
1956 if (fchmod (ofd
, st
.st_mode
& 07777) != 0)
1957 report_file_error ("Doing chmod", Fcons (newname
, Qnil
));
1959 #endif /* not MSDOS */
1964 /* Set the modified context back to the file. */
1965 fail
= fsetfilecon (ofd
, con
);
1967 report_file_error ("Doing fsetfilecon", Fcons (newname
, Qnil
));
1973 /* Closing the output clobbers the file times on some systems. */
1974 if (emacs_close (ofd
) < 0)
1975 report_file_error ("I/O error", Fcons (newname
, Qnil
));
1977 if (input_file_statable_p
)
1979 if (!NILP (keep_time
))
1981 EMACS_TIME atime
, mtime
;
1982 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
1983 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
1984 if (set_file_times (SSDATA (encoded_newname
),
1986 xsignal2 (Qfile_date_error
,
1987 build_string ("Cannot set file date"), newname
);
1994 if (input_file_statable_p
)
1996 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
1997 and if it can't, it tells so. Otherwise, under MSDOS we usually
1998 get only the READ bit, which will make the copied file read-only,
1999 so it's better not to chmod at all. */
2000 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2001 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2004 #endif /* not WINDOWSNT */
2006 /* Discard the unwind protects. */
2007 specpdl_ptr
= specpdl
+ count
;
2013 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2014 Smake_directory_internal
, 1, 1, 0,
2015 doc
: /* Create a new directory named DIRECTORY. */)
2016 (Lisp_Object directory
)
2019 Lisp_Object handler
;
2020 Lisp_Object encoded_dir
;
2022 CHECK_STRING (directory
);
2023 directory
= Fexpand_file_name (directory
, Qnil
);
2025 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2026 if (!NILP (handler
))
2027 return call2 (handler
, Qmake_directory_internal
, directory
);
2029 encoded_dir
= ENCODE_FILE (directory
);
2031 dir
= SSDATA (encoded_dir
);
2034 if (mkdir (dir
) != 0)
2036 if (mkdir (dir
, 0777) != 0)
2038 report_file_error ("Creating directory", list1 (directory
));
2043 DEFUN ("delete-directory-internal", Fdelete_directory_internal
,
2044 Sdelete_directory_internal
, 1, 1, 0,
2045 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2046 (Lisp_Object directory
)
2049 Lisp_Object encoded_dir
;
2051 CHECK_STRING (directory
);
2052 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2053 encoded_dir
= ENCODE_FILE (directory
);
2054 dir
= SSDATA (encoded_dir
);
2056 if (rmdir (dir
) != 0)
2057 report_file_error ("Removing directory", list1 (directory
));
2062 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 2,
2063 "(list (read-file-name \
2064 (if (and delete-by-moving-to-trash (null current-prefix-arg)) \
2065 \"Move file to trash: \" \"Delete file: \") \
2066 nil default-directory (confirm-nonexistent-file-or-buffer)) \
2067 (null current-prefix-arg))",
2068 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2069 If file has multiple names, it continues to exist with the other names.
2070 TRASH non-nil means to trash the file instead of deleting, provided
2071 `delete-by-moving-to-trash' is non-nil.
2073 When called interactively, TRASH is t if no prefix argument is given.
2074 With a prefix argument, TRASH is nil. */)
2075 (Lisp_Object filename
, Lisp_Object trash
)
2077 Lisp_Object handler
;
2078 Lisp_Object encoded_file
;
2079 struct gcpro gcpro1
;
2082 if (!NILP (Ffile_directory_p (filename
))
2083 && NILP (Ffile_symlink_p (filename
)))
2084 xsignal2 (Qfile_error
,
2085 build_string ("Removing old name: is a directory"),
2088 filename
= Fexpand_file_name (filename
, Qnil
);
2090 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2091 if (!NILP (handler
))
2092 return call3 (handler
, Qdelete_file
, filename
, trash
);
2094 if (delete_by_moving_to_trash
&& !NILP (trash
))
2095 return call1 (Qmove_file_to_trash
, filename
);
2097 encoded_file
= ENCODE_FILE (filename
);
2099 if (0 > unlink (SSDATA (encoded_file
)))
2100 report_file_error ("Removing old name", list1 (filename
));
2105 internal_delete_file_1 (Lisp_Object ignore
)
2110 /* Delete file FILENAME, returning 1 if successful and 0 if failed.
2111 This ignores `delete-by-moving-to-trash'. */
2114 internal_delete_file (Lisp_Object filename
)
2118 tem
= internal_condition_case_2 (Fdelete_file
, filename
, Qnil
,
2119 Qt
, internal_delete_file_1
);
2123 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2124 "fRename file: \nGRename %s to file: \np",
2125 doc
: /* Rename FILE as NEWNAME. Both args must be strings.
2126 If file has names other than FILE, it continues to have those names.
2127 Signals a `file-already-exists' error if a file NEWNAME already exists
2128 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2129 A number as third arg means request confirmation if NEWNAME already exists.
2130 This is what happens in interactive use with M-x. */)
2131 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
)
2133 Lisp_Object handler
;
2134 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2135 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2137 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2138 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2139 CHECK_STRING (file
);
2140 CHECK_STRING (newname
);
2141 file
= Fexpand_file_name (file
, Qnil
);
2143 if ((!NILP (Ffile_directory_p (newname
)))
2145 /* If the file names are identical but for the case,
2146 don't attempt to move directory to itself. */
2147 && (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2151 Lisp_Object fname
= NILP (Ffile_directory_p (file
))
2152 ? file
: Fdirectory_file_name (file
);
2153 newname
= Fexpand_file_name (Ffile_name_nondirectory (fname
), newname
);
2156 newname
= Fexpand_file_name (newname
, Qnil
);
2158 /* If the file name has special constructs in it,
2159 call the corresponding file handler. */
2160 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2162 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2163 if (!NILP (handler
))
2164 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2165 file
, newname
, ok_if_already_exists
));
2167 encoded_file
= ENCODE_FILE (file
);
2168 encoded_newname
= ENCODE_FILE (newname
);
2171 /* If the file names are identical but for the case, don't ask for
2172 confirmation: they simply want to change the letter-case of the
2174 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2176 if (NILP (ok_if_already_exists
)
2177 || INTEGERP (ok_if_already_exists
))
2178 barf_or_query_if_file_exists (newname
, "rename to it",
2179 INTEGERP (ok_if_already_exists
), 0, 0);
2180 if (0 > rename (SSDATA (encoded_file
), SSDATA (encoded_newname
)))
2185 symlink_target
= Ffile_symlink_p (file
);
2186 if (! NILP (symlink_target
))
2187 Fmake_symbolic_link (symlink_target
, newname
,
2188 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2189 else if (!NILP (Ffile_directory_p (file
)))
2190 call4 (Qcopy_directory
, file
, newname
, Qt
, Qnil
);
2192 /* We have already prompted if it was an integer, so don't
2193 have copy-file prompt again. */
2194 Fcopy_file (file
, newname
,
2195 NILP (ok_if_already_exists
) ? Qnil
: Qt
,
2198 count
= SPECPDL_INDEX ();
2199 specbind (Qdelete_by_moving_to_trash
, Qnil
);
2201 if (!NILP (Ffile_directory_p (file
)) && NILP (symlink_target
))
2202 call2 (Qdelete_directory
, file
, Qt
);
2204 Fdelete_file (file
, Qnil
);
2205 unbind_to (count
, Qnil
);
2208 report_file_error ("Renaming", list2 (file
, newname
));
2214 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2215 "fAdd name to file: \nGName to add to %s: \np",
2216 doc
: /* Give FILE additional name NEWNAME. Both args must be strings.
2217 Signals a `file-already-exists' error if a file NEWNAME already exists
2218 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2219 A number as third arg means request confirmation if NEWNAME already exists.
2220 This is what happens in interactive use with M-x. */)
2221 (Lisp_Object file
, Lisp_Object newname
, Lisp_Object ok_if_already_exists
)
2223 Lisp_Object handler
;
2224 Lisp_Object encoded_file
, encoded_newname
;
2225 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2227 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2228 encoded_file
= encoded_newname
= Qnil
;
2229 CHECK_STRING (file
);
2230 CHECK_STRING (newname
);
2231 file
= Fexpand_file_name (file
, Qnil
);
2233 if (!NILP (Ffile_directory_p (newname
)))
2234 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2236 newname
= Fexpand_file_name (newname
, Qnil
);
2238 /* If the file name has special constructs in it,
2239 call the corresponding file handler. */
2240 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2241 if (!NILP (handler
))
2242 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2243 newname
, ok_if_already_exists
));
2245 /* If the new name has special constructs in it,
2246 call the corresponding file handler. */
2247 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2248 if (!NILP (handler
))
2249 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2250 newname
, ok_if_already_exists
));
2252 encoded_file
= ENCODE_FILE (file
);
2253 encoded_newname
= ENCODE_FILE (newname
);
2255 if (NILP (ok_if_already_exists
)
2256 || INTEGERP (ok_if_already_exists
))
2257 barf_or_query_if_file_exists (newname
, "make it a new name",
2258 INTEGERP (ok_if_already_exists
), 0, 0);
2260 unlink (SSDATA (newname
));
2261 if (0 > link (SSDATA (encoded_file
), SSDATA (encoded_newname
)))
2262 report_file_error ("Adding new name", list2 (file
, newname
));
2268 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2269 "FMake symbolic link to file: \nGMake symbolic link to file %s: \np",
2270 doc
: /* Make a symbolic link to FILENAME, named LINKNAME.
2271 Both args must be strings.
2272 Signals a `file-already-exists' error if a file LINKNAME already exists
2273 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2274 A number as third arg means request confirmation if LINKNAME already exists.
2275 This happens for interactive use with M-x. */)
2276 (Lisp_Object filename
, Lisp_Object linkname
, Lisp_Object ok_if_already_exists
)
2278 Lisp_Object handler
;
2279 Lisp_Object encoded_filename
, encoded_linkname
;
2280 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2282 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2283 encoded_filename
= encoded_linkname
= Qnil
;
2284 CHECK_STRING (filename
);
2285 CHECK_STRING (linkname
);
2286 /* If the link target has a ~, we must expand it to get
2287 a truly valid file name. Otherwise, do not expand;
2288 we want to permit links to relative file names. */
2289 if (SREF (filename
, 0) == '~')
2290 filename
= Fexpand_file_name (filename
, Qnil
);
2292 if (!NILP (Ffile_directory_p (linkname
)))
2293 linkname
= Fexpand_file_name (Ffile_name_nondirectory (filename
), linkname
);
2295 linkname
= Fexpand_file_name (linkname
, Qnil
);
2297 /* If the file name has special constructs in it,
2298 call the corresponding file handler. */
2299 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2300 if (!NILP (handler
))
2301 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2302 linkname
, ok_if_already_exists
));
2304 /* If the new link name has special constructs in it,
2305 call the corresponding file handler. */
2306 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2307 if (!NILP (handler
))
2308 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2309 linkname
, ok_if_already_exists
));
2311 encoded_filename
= ENCODE_FILE (filename
);
2312 encoded_linkname
= ENCODE_FILE (linkname
);
2314 if (NILP (ok_if_already_exists
)
2315 || INTEGERP (ok_if_already_exists
))
2316 barf_or_query_if_file_exists (linkname
, "make it a link",
2317 INTEGERP (ok_if_already_exists
), 0, 0);
2318 if (0 > symlink (SSDATA (encoded_filename
),
2319 SSDATA (encoded_linkname
)))
2321 /* If we didn't complain already, silently delete existing file. */
2322 if (errno
== EEXIST
)
2324 unlink (SSDATA (encoded_linkname
));
2325 if (0 <= symlink (SSDATA (encoded_filename
),
2326 SSDATA (encoded_linkname
)))
2332 if (errno
== ENOSYS
)
2335 xsignal1 (Qfile_error
,
2336 build_string ("Symbolic links are not supported"));
2339 report_file_error ("Making symbolic link", list2 (filename
, linkname
));
2346 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2348 doc
: /* Return t if file FILENAME specifies an absolute file name.
2349 On Unix, this is a name starting with a `/' or a `~'. */)
2350 (Lisp_Object filename
)
2352 CHECK_STRING (filename
);
2353 return file_name_absolute_p (SSDATA (filename
)) ? Qt
: Qnil
;
2356 /* Return nonzero if file FILENAME exists and can be executed. */
2359 check_executable (char *filename
)
2363 if (stat (filename
, &st
) < 0)
2365 return ((st
.st_mode
& S_IEXEC
) != 0);
2366 #else /* not DOS_NT */
2367 #ifdef HAVE_EUIDACCESS
2368 return (euidaccess (filename
, 1) >= 0);
2370 /* Access isn't quite right because it uses the real uid
2371 and we really want to test with the effective uid.
2372 But Unix doesn't give us a right way to do it. */
2373 return (access (filename
, 1) >= 0);
2375 #endif /* not DOS_NT */
2378 /* Return nonzero if file FILENAME exists and can be written. */
2381 check_writable (const char *filename
)
2385 if (stat (filename
, &st
) < 0)
2387 return (st
.st_mode
& S_IWRITE
|| S_ISDIR (st
.st_mode
));
2388 #else /* not MSDOS */
2389 #ifdef HAVE_EUIDACCESS
2390 return (euidaccess (filename
, 2) >= 0);
2392 /* Access isn't quite right because it uses the real uid
2393 and we really want to test with the effective uid.
2394 But Unix doesn't give us a right way to do it.
2395 Opening with O_WRONLY could work for an ordinary file,
2396 but would lose for directories. */
2397 return (access (filename
, 2) >= 0);
2399 #endif /* not MSDOS */
2402 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
2403 doc
: /* Return t if file FILENAME exists (whether or not you can read it.)
2404 See also `file-readable-p' and `file-attributes'.
2405 This returns nil for a symlink to a nonexistent file.
2406 Use `file-symlink-p' to test for such links. */)
2407 (Lisp_Object filename
)
2409 Lisp_Object absname
;
2410 Lisp_Object handler
;
2411 struct stat statbuf
;
2413 CHECK_STRING (filename
);
2414 absname
= Fexpand_file_name (filename
, Qnil
);
2416 /* If the file name has special constructs in it,
2417 call the corresponding file handler. */
2418 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
2419 if (!NILP (handler
))
2420 return call2 (handler
, Qfile_exists_p
, absname
);
2422 absname
= ENCODE_FILE (absname
);
2424 return (stat (SSDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
2427 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
2428 doc
: /* Return t if FILENAME can be executed by you.
2429 For a directory, this means you can access files in that directory. */)
2430 (Lisp_Object filename
)
2432 Lisp_Object absname
;
2433 Lisp_Object handler
;
2435 CHECK_STRING (filename
);
2436 absname
= Fexpand_file_name (filename
, Qnil
);
2438 /* If the file name has special constructs in it,
2439 call the corresponding file handler. */
2440 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
2441 if (!NILP (handler
))
2442 return call2 (handler
, Qfile_executable_p
, absname
);
2444 absname
= ENCODE_FILE (absname
);
2446 return (check_executable (SSDATA (absname
)) ? Qt
: Qnil
);
2449 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
2450 doc
: /* Return t if file FILENAME exists and you can read it.
2451 See also `file-exists-p' and `file-attributes'. */)
2452 (Lisp_Object filename
)
2454 Lisp_Object absname
;
2455 Lisp_Object handler
;
2458 struct stat statbuf
;
2460 CHECK_STRING (filename
);
2461 absname
= Fexpand_file_name (filename
, Qnil
);
2463 /* If the file name has special constructs in it,
2464 call the corresponding file handler. */
2465 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
2466 if (!NILP (handler
))
2467 return call2 (handler
, Qfile_readable_p
, absname
);
2469 absname
= ENCODE_FILE (absname
);
2471 #if defined(DOS_NT) || defined(macintosh)
2472 /* Under MS-DOS, Windows, and Macintosh, open does not work for
2474 if (access (SDATA (absname
), 0) == 0)
2477 #else /* not DOS_NT and not macintosh */
2480 /* Opening a fifo without O_NONBLOCK can wait.
2481 We don't want to wait. But we don't want to mess wth O_NONBLOCK
2482 except in the case of a fifo, on a system which handles it. */
2483 desc
= stat (SSDATA (absname
), &statbuf
);
2486 if (S_ISFIFO (statbuf
.st_mode
))
2487 flags
|= O_NONBLOCK
;
2489 desc
= emacs_open (SSDATA (absname
), flags
, 0);
2494 #endif /* not DOS_NT and not macintosh */
2497 /* Having this before file-symlink-p mysteriously caused it to be forgotten
2499 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
2500 doc
: /* Return t if file FILENAME can be written or created by you. */)
2501 (Lisp_Object filename
)
2503 Lisp_Object absname
, dir
, encoded
;
2504 Lisp_Object handler
;
2505 struct stat statbuf
;
2507 CHECK_STRING (filename
);
2508 absname
= Fexpand_file_name (filename
, Qnil
);
2510 /* If the file name has special constructs in it,
2511 call the corresponding file handler. */
2512 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
2513 if (!NILP (handler
))
2514 return call2 (handler
, Qfile_writable_p
, absname
);
2516 encoded
= ENCODE_FILE (absname
);
2517 if (stat (SSDATA (encoded
), &statbuf
) >= 0)
2518 return (check_writable (SSDATA (encoded
))
2521 dir
= Ffile_name_directory (absname
);
2524 dir
= Fdirectory_file_name (dir
);
2527 dir
= ENCODE_FILE (dir
);
2529 /* The read-only attribute of the parent directory doesn't affect
2530 whether a file or directory can be created within it. Some day we
2531 should check ACLs though, which do affect this. */
2532 if (stat (SDATA (dir
), &statbuf
) < 0)
2534 return S_ISDIR (statbuf
.st_mode
) ? Qt
: Qnil
;
2536 return (check_writable (!NILP (dir
) ? SSDATA (dir
) : "")
2541 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
2542 doc
: /* Access file FILENAME, and get an error if that does not work.
2543 The second argument STRING is used in the error message.
2544 If there is no error, returns nil. */)
2545 (Lisp_Object filename
, Lisp_Object string
)
2547 Lisp_Object handler
, encoded_filename
, absname
;
2550 CHECK_STRING (filename
);
2551 absname
= Fexpand_file_name (filename
, Qnil
);
2553 CHECK_STRING (string
);
2555 /* If the file name has special constructs in it,
2556 call the corresponding file handler. */
2557 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
2558 if (!NILP (handler
))
2559 return call3 (handler
, Qaccess_file
, absname
, string
);
2561 encoded_filename
= ENCODE_FILE (absname
);
2563 fd
= emacs_open (SSDATA (encoded_filename
), O_RDONLY
, 0);
2565 report_file_error (SSDATA (string
), Fcons (filename
, Qnil
));
2571 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
2572 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
2573 The value is the link target, as a string.
2574 Otherwise it returns nil.
2576 This function returns t when given the name of a symlink that
2577 points to a nonexistent file. */)
2578 (Lisp_Object filename
)
2580 Lisp_Object handler
;
2586 CHECK_STRING (filename
);
2587 filename
= Fexpand_file_name (filename
, Qnil
);
2589 /* If the file name has special constructs in it,
2590 call the corresponding file handler. */
2591 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
2592 if (!NILP (handler
))
2593 return call2 (handler
, Qfile_symlink_p
, filename
);
2595 filename
= ENCODE_FILE (filename
);
2602 buf
= (char *) xrealloc (buf
, bufsize
);
2603 memset (buf
, 0, bufsize
);
2606 valsize
= readlink (SSDATA (filename
), buf
, bufsize
);
2610 /* HP-UX reports ERANGE if buffer is too small. */
2611 if (errno
== ERANGE
)
2621 while (valsize
>= bufsize
);
2623 val
= make_string (buf
, valsize
);
2624 if (buf
[0] == '/' && strchr (buf
, ':'))
2625 val
= concat2 (build_string ("/:"), val
);
2627 val
= DECODE_FILE (val
);
2631 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
2632 doc
: /* Return t if FILENAME names an existing directory.
2633 Symbolic links to directories count as directories.
2634 See `file-symlink-p' to distinguish symlinks. */)
2635 (Lisp_Object filename
)
2637 register Lisp_Object absname
;
2639 Lisp_Object handler
;
2641 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2643 /* If the file name has special constructs in it,
2644 call the corresponding file handler. */
2645 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
2646 if (!NILP (handler
))
2647 return call2 (handler
, Qfile_directory_p
, absname
);
2649 absname
= ENCODE_FILE (absname
);
2651 if (stat (SSDATA (absname
), &st
) < 0)
2653 return S_ISDIR (st
.st_mode
) ? Qt
: Qnil
;
2656 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
2657 doc
: /* Return t if file FILENAME names a directory you can open.
2658 For the value to be t, FILENAME must specify the name of a directory as a file,
2659 and the directory must allow you to open files in it. In order to use a
2660 directory as a buffer's current directory, this predicate must return true.
2661 A directory name spec may be given instead; then the value is t
2662 if the directory so specified exists and really is a readable and
2663 searchable directory. */)
2664 (Lisp_Object filename
)
2666 Lisp_Object handler
;
2668 struct gcpro gcpro1
;
2670 /* If the file name has special constructs in it,
2671 call the corresponding file handler. */
2672 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
2673 if (!NILP (handler
))
2674 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
2677 tem
= (NILP (Ffile_directory_p (filename
))
2678 || NILP (Ffile_executable_p (filename
)));
2680 return tem
? Qnil
: Qt
;
2683 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
2684 doc
: /* Return t if FILENAME names a regular file.
2685 This is the sort of file that holds an ordinary stream of data bytes.
2686 Symbolic links to regular files count as regular files.
2687 See `file-symlink-p' to distinguish symlinks. */)
2688 (Lisp_Object filename
)
2690 register Lisp_Object absname
;
2692 Lisp_Object handler
;
2694 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2696 /* If the file name has special constructs in it,
2697 call the corresponding file handler. */
2698 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
2699 if (!NILP (handler
))
2700 return call2 (handler
, Qfile_regular_p
, absname
);
2702 absname
= ENCODE_FILE (absname
);
2707 Lisp_Object tem
= Vw32_get_true_file_attributes
;
2709 /* Tell stat to use expensive method to get accurate info. */
2710 Vw32_get_true_file_attributes
= Qt
;
2711 result
= stat (SDATA (absname
), &st
);
2712 Vw32_get_true_file_attributes
= tem
;
2716 return S_ISREG (st
.st_mode
) ? Qt
: Qnil
;
2719 if (stat (SSDATA (absname
), &st
) < 0)
2721 return S_ISREG (st
.st_mode
) ? Qt
: Qnil
;
2725 DEFUN ("file-selinux-context", Ffile_selinux_context
,
2726 Sfile_selinux_context
, 1, 1, 0,
2727 doc
: /* Return SELinux context of file named FILENAME,
2728 as a list ("user", "role", "type", "range"). Return (nil, nil, nil, nil)
2729 if file does not exist, is not accessible, or SELinux is disabled */)
2730 (Lisp_Object filename
)
2732 Lisp_Object absname
;
2733 Lisp_Object values
[4];
2734 Lisp_Object handler
;
2736 security_context_t con
;
2741 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2743 /* If the file name has special constructs in it,
2744 call the corresponding file handler. */
2745 handler
= Ffind_file_name_handler (absname
, Qfile_selinux_context
);
2746 if (!NILP (handler
))
2747 return call2 (handler
, Qfile_selinux_context
, absname
);
2749 absname
= ENCODE_FILE (absname
);
2756 if (is_selinux_enabled ())
2758 conlength
= lgetfilecon (SSDATA (absname
), &con
);
2761 context
= context_new (con
);
2762 if (context_user_get (context
))
2763 values
[0] = build_string (context_user_get (context
));
2764 if (context_role_get (context
))
2765 values
[1] = build_string (context_role_get (context
));
2766 if (context_type_get (context
))
2767 values
[2] = build_string (context_type_get (context
));
2768 if (context_range_get (context
))
2769 values
[3] = build_string (context_range_get (context
));
2770 context_free (context
);
2777 return Flist (sizeof(values
) / sizeof(values
[0]), values
);
2780 DEFUN ("set-file-selinux-context", Fset_file_selinux_context
,
2781 Sset_file_selinux_context
, 2, 2, 0,
2782 doc
: /* Set SELinux context of file named FILENAME to CONTEXT
2783 as a list ("user", "role", "type", "range"). Has no effect if SELinux
2785 (Lisp_Object filename
, Lisp_Object context
)
2787 Lisp_Object absname
;
2788 Lisp_Object handler
;
2790 Lisp_Object encoded_absname
;
2791 Lisp_Object user
= CAR_SAFE (context
);
2792 Lisp_Object role
= CAR_SAFE (CDR_SAFE (context
));
2793 Lisp_Object type
= CAR_SAFE (CDR_SAFE (CDR_SAFE (context
)));
2794 Lisp_Object range
= CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context
))));
2795 security_context_t con
;
2796 int fail
, conlength
;
2797 context_t parsed_con
;
2800 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
2802 /* If the file name has special constructs in it,
2803 call the corresponding file handler. */
2804 handler
= Ffind_file_name_handler (absname
, Qset_file_selinux_context
);
2805 if (!NILP (handler
))
2806 return call3 (handler
, Qset_file_selinux_context
, absname
, context
);
2809 encoded_absname
= ENCODE_FILE (absname
);
2811 if (is_selinux_enabled ())
2813 /* Get current file context. */
2814 conlength
= lgetfilecon (SSDATA (encoded_absname
), &con
);
2817 parsed_con
= context_new (con
);
2818 /* Change the parts defined in the parameter.*/
2821 if (context_user_set (parsed_con
, SSDATA (user
)))
2822 error ("Doing context_user_set");
2826 if (context_role_set (parsed_con
, SSDATA (role
)))
2827 error ("Doing context_role_set");
2831 if (context_type_set (parsed_con
, SSDATA (type
)))
2832 error ("Doing context_type_set");
2834 if (STRINGP (range
))
2836 if (context_range_set (parsed_con
, SSDATA (range
)))
2837 error ("Doing context_range_set");
2840 /* Set the modified context back to the file. */
2841 fail
= lsetfilecon (SSDATA (encoded_absname
),
2842 context_str (parsed_con
));
2844 report_file_error ("Doing lsetfilecon", Fcons (absname
, Qnil
));
2846 context_free (parsed_con
);
2849 report_file_error("Doing lgetfilecon", Fcons (absname
, Qnil
));
2859 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
2860 doc
: /* Return mode bits of file named FILENAME, as an integer.
2861 Return nil, if file does not exist or is not accessible. */)
2862 (Lisp_Object filename
)
2864 Lisp_Object absname
;
2866 Lisp_Object handler
;
2868 absname
= expand_and_dir_to_file (filename
, BVAR (current_buffer
, directory
));
2870 /* If the file name has special constructs in it,
2871 call the corresponding file handler. */
2872 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
2873 if (!NILP (handler
))
2874 return call2 (handler
, Qfile_modes
, absname
);
2876 absname
= ENCODE_FILE (absname
);
2878 if (stat (SSDATA (absname
), &st
) < 0)
2881 return make_number (st
.st_mode
& 07777);
2884 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2,
2885 "(let ((file (read-file-name \"File: \"))) \
2886 (list file (read-file-modes nil file)))",
2887 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
2888 Only the 12 low bits of MODE are used.
2890 Interactively, mode bits are read by `read-file-modes', which accepts
2891 symbolic notation, like the `chmod' command from GNU Coreutils. */)
2892 (Lisp_Object filename
, Lisp_Object mode
)
2894 Lisp_Object absname
, encoded_absname
;
2895 Lisp_Object handler
;
2897 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
2898 CHECK_NUMBER (mode
);
2900 /* If the file name has special constructs in it,
2901 call the corresponding file handler. */
2902 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
2903 if (!NILP (handler
))
2904 return call3 (handler
, Qset_file_modes
, absname
, mode
);
2906 encoded_absname
= ENCODE_FILE (absname
);
2908 if (chmod (SSDATA (encoded_absname
), XINT (mode
)) < 0)
2909 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
2914 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
2915 doc
: /* Set the file permission bits for newly created files.
2916 The argument MODE should be an integer; only the low 9 bits are used.
2917 This setting is inherited by subprocesses. */)
2920 CHECK_NUMBER (mode
);
2922 umask ((~ XINT (mode
)) & 0777);
2927 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
2928 doc
: /* Return the default file protection for created files.
2929 The value is an integer. */)
2935 realmask
= umask (0);
2938 XSETINT (value
, (~ realmask
) & 0777);
2943 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
2944 doc
: /* Set times of file FILENAME to TIMESTAMP.
2945 Set both access and modification times.
2946 Return t on success, else nil.
2947 Use the current time if TIMESTAMP is nil. TIMESTAMP is in the format of
2949 (Lisp_Object filename
, Lisp_Object timestamp
)
2951 Lisp_Object absname
, encoded_absname
;
2952 Lisp_Object handler
;
2956 if (! lisp_time_argument (timestamp
, &sec
, &usec
))
2957 error ("Invalid time specification");
2959 absname
= Fexpand_file_name (filename
, BVAR (current_buffer
, directory
));
2961 /* If the file name has special constructs in it,
2962 call the corresponding file handler. */
2963 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
2964 if (!NILP (handler
))
2965 return call3 (handler
, Qset_file_times
, absname
, timestamp
);
2967 encoded_absname
= ENCODE_FILE (absname
);
2972 EMACS_SET_SECS (t
, sec
);
2973 EMACS_SET_USECS (t
, usec
);
2975 if (set_file_times (SSDATA (encoded_absname
), t
, t
))
2980 /* Setting times on a directory always fails. */
2981 if (stat (SSDATA (encoded_absname
), &st
) == 0 && S_ISDIR (st
.st_mode
))
2984 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
2993 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
2994 doc
: /* Tell Unix to finish all pending disk updates. */)
3001 #endif /* HAVE_SYNC */
3003 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3004 doc
: /* Return t if file FILE1 is newer than file FILE2.
3005 If FILE1 does not exist, the answer is nil;
3006 otherwise, if FILE2 does not exist, the answer is t. */)
3007 (Lisp_Object file1
, Lisp_Object file2
)
3009 Lisp_Object absname1
, absname2
;
3012 Lisp_Object handler
;
3013 struct gcpro gcpro1
, gcpro2
;
3015 CHECK_STRING (file1
);
3016 CHECK_STRING (file2
);
3019 GCPRO2 (absname1
, file2
);
3020 absname1
= expand_and_dir_to_file (file1
, BVAR (current_buffer
, directory
));
3021 absname2
= expand_and_dir_to_file (file2
, BVAR (current_buffer
, directory
));
3024 /* If the file name has special constructs in it,
3025 call the corresponding file handler. */
3026 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3028 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3029 if (!NILP (handler
))
3030 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3032 GCPRO2 (absname1
, absname2
);
3033 absname1
= ENCODE_FILE (absname1
);
3034 absname2
= ENCODE_FILE (absname2
);
3037 if (stat (SSDATA (absname1
), &st
) < 0)
3040 mtime1
= st
.st_mtime
;
3042 if (stat (SSDATA (absname2
), &st
) < 0)
3045 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3048 #ifndef READ_BUF_SIZE
3049 #define READ_BUF_SIZE (64 << 10)
3052 /* This function is called after Lisp functions to decide a coding
3053 system are called, or when they cause an error. Before they are
3054 called, the current buffer is set unibyte and it contains only a
3055 newly inserted text (thus the buffer was empty before the
3058 The functions may set markers, overlays, text properties, or even
3059 alter the buffer contents, change the current buffer.
3061 Here, we reset all those changes by:
3062 o set back the current buffer.
3063 o move all markers and overlays to BEG.
3064 o remove all text properties.
3065 o set back the buffer multibyteness. */
3068 decide_coding_unwind (Lisp_Object unwind_data
)
3070 Lisp_Object multibyte
, undo_list
, buffer
;
3072 multibyte
= XCAR (unwind_data
);
3073 unwind_data
= XCDR (unwind_data
);
3074 undo_list
= XCAR (unwind_data
);
3075 buffer
= XCDR (unwind_data
);
3077 if (current_buffer
!= XBUFFER (buffer
))
3078 set_buffer_internal (XBUFFER (buffer
));
3079 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3080 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3081 BUF_INTERVALS (current_buffer
) = 0;
3082 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3084 /* Now we are safe to change the buffer's multibyteness directly. */
3085 BVAR (current_buffer
, enable_multibyte_characters
) = multibyte
;
3086 BVAR (current_buffer
, undo_list
) = undo_list
;
3092 /* Used to pass values from insert-file-contents to read_non_regular. */
3094 static int non_regular_fd
;
3095 static EMACS_INT non_regular_inserted
;
3096 static EMACS_INT non_regular_nbytes
;
3099 /* Read from a non-regular file.
3100 Read non_regular_nbytes bytes max from non_regular_fd.
3101 Non_regular_inserted specifies where to put the read bytes.
3102 Value is the number of bytes read. */
3105 read_non_regular (Lisp_Object ignore
)
3111 nbytes
= emacs_read (non_regular_fd
,
3112 ((char *) BEG_ADDR
+ PT_BYTE
- BEG_BYTE
3113 + non_regular_inserted
),
3114 non_regular_nbytes
);
3116 return make_number (nbytes
);
3120 /* Condition-case handler used when reading from non-regular files
3121 in insert-file-contents. */
3124 read_non_regular_quit (Lisp_Object ignore
)
3130 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3132 doc
: /* Insert contents of file FILENAME after point.
3133 Returns list of absolute file name and number of characters inserted.
3134 If second argument VISIT is non-nil, the buffer's visited filename and
3135 last save file modtime are set, and it is marked unmodified. If
3136 visiting and the file does not exist, visiting is completed before the
3139 The optional third and fourth arguments BEG and END specify what portion
3140 of the file to insert. These arguments count bytes in the file, not
3141 characters in the buffer. If VISIT is non-nil, BEG and END must be nil.
3143 If optional fifth argument REPLACE is non-nil, replace the current
3144 buffer contents (in the accessible portion) with the file contents.
3145 This is better than simply deleting and inserting the whole thing
3146 because (1) it preserves some marker positions and (2) it puts less data
3147 in the undo list. When REPLACE is non-nil, the second return value is
3148 the number of characters that replace previous buffer contents.
3150 This function does code conversion according to the value of
3151 `coding-system-for-read' or `file-coding-system-alist', and sets the
3152 variable `last-coding-system-used' to the coding system actually used. */)
3153 (Lisp_Object filename
, Lisp_Object visit
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object replace
)
3157 EMACS_INT inserted
= 0;
3159 register EMACS_INT how_much
;
3160 register EMACS_INT unprocessed
;
3161 int count
= SPECPDL_INDEX ();
3162 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3163 Lisp_Object handler
, val
, insval
, orig_filename
, old_undo
;
3165 EMACS_INT total
= 0;
3166 int not_regular
= 0;
3167 char read_buf
[READ_BUF_SIZE
];
3168 struct coding_system coding
;
3169 char buffer
[1 << 14];
3170 int replace_handled
= 0;
3171 int set_coding_system
= 0;
3172 Lisp_Object coding_system
;
3174 Lisp_Object old_Vdeactivate_mark
= Vdeactivate_mark
;
3175 int we_locked_file
= 0;
3176 int deferred_remove_unwind_protect
= 0;
3178 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3179 error ("Cannot do file visiting in an indirect buffer");
3181 if (!NILP (BVAR (current_buffer
, read_only
)))
3182 Fbarf_if_buffer_read_only ();
3186 orig_filename
= Qnil
;
3189 GCPRO5 (filename
, val
, p
, orig_filename
, old_undo
);
3191 CHECK_STRING (filename
);
3192 filename
= Fexpand_file_name (filename
, Qnil
);
3194 /* The value Qnil means that the coding system is not yet
3196 coding_system
= Qnil
;
3198 /* If the file name has special constructs in it,
3199 call the corresponding file handler. */
3200 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3201 if (!NILP (handler
))
3203 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3204 visit
, beg
, end
, replace
);
3205 if (CONSP (val
) && CONSP (XCDR (val
)))
3206 inserted
= XINT (XCAR (XCDR (val
)));
3210 orig_filename
= filename
;
3211 filename
= ENCODE_FILE (filename
);
3217 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3219 /* Tell stat to use expensive method to get accurate info. */
3220 Vw32_get_true_file_attributes
= Qt
;
3221 total
= stat (SSDATA (filename
), &st
);
3222 Vw32_get_true_file_attributes
= tem
;
3226 if (stat (SSDATA (filename
), &st
) < 0)
3227 #endif /* WINDOWSNT */
3229 if (fd
>= 0) emacs_close (fd
);
3232 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3235 if (!NILP (Vcoding_system_for_read
))
3236 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3240 /* This code will need to be changed in order to work on named
3241 pipes, and it's probably just not worth it. So we should at
3242 least signal an error. */
3243 if (!S_ISREG (st
.st_mode
))
3250 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3251 xsignal2 (Qfile_error
,
3252 build_string ("not a regular file"), orig_filename
);
3256 if ((fd
= emacs_open (SSDATA (filename
), O_RDONLY
, 0)) < 0)
3259 /* Replacement should preserve point as it preserves markers. */
3260 if (!NILP (replace
))
3261 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3263 record_unwind_protect (close_file_unwind
, make_number (fd
));
3265 /* Can happen on any platform that uses long as type of off_t, but allows
3266 file sizes to exceed 2Gb, so give a suitable message. */
3267 if (! not_regular
&& st
.st_size
< 0)
3268 error ("Maximum buffer size exceeded");
3270 /* Prevent redisplay optimizations. */
3271 current_buffer
->clip_changed
= 1;
3275 if (!NILP (beg
) || !NILP (end
))
3276 error ("Attempt to visit less than an entire file");
3277 if (BEG
< Z
&& NILP (replace
))
3278 error ("Cannot do file visiting in a non-empty buffer");
3284 XSETFASTINT (beg
, 0);
3292 XSETINT (end
, st
.st_size
);
3294 /* Arithmetic overflow can occur if an Emacs integer cannot
3295 represent the file size, or if the calculations below
3296 overflow. The calculations below double the file size
3297 twice, so check that it can be multiplied by 4 safely. */
3298 if (XINT (end
) != st
.st_size
3299 /* Actually, it should test either INT_MAX or LONG_MAX
3300 depending on which one is used for EMACS_INT. But in
3301 any case, in practice, this test is redundant with the
3303 || st.st_size > INT_MAX / 4 */)
3304 error ("Maximum buffer size exceeded");
3306 /* The file size returned from stat may be zero, but data
3307 may be readable nonetheless, for example when this is a
3308 file in the /proc filesystem. */
3309 if (st
.st_size
== 0)
3310 XSETINT (end
, READ_BUF_SIZE
);
3314 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3316 coding_system
= coding_inherit_eol_type (Qutf_8_emacs
, Qunix
);
3317 setup_coding_system (coding_system
, &coding
);
3318 /* Ensure we set Vlast_coding_system_used. */
3319 set_coding_system
= 1;
3323 /* Decide the coding system to use for reading the file now
3324 because we can't use an optimized method for handling
3325 `coding:' tag if the current buffer is not empty. */
3326 if (!NILP (Vcoding_system_for_read
))
3327 coding_system
= Vcoding_system_for_read
;
3330 /* Don't try looking inside a file for a coding system
3331 specification if it is not seekable. */
3332 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3334 /* Find a coding system specified in the heading two
3335 lines or in the tailing several lines of the file.
3336 We assume that the 1K-byte and 3K-byte for heading
3337 and tailing respectively are sufficient for this
3341 if (st
.st_size
<= (1024 * 4))
3342 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3345 nread
= emacs_read (fd
, read_buf
, 1024);
3348 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3349 report_file_error ("Setting file position",
3350 Fcons (orig_filename
, Qnil
));
3351 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3356 error ("IO error reading %s: %s",
3357 SDATA (orig_filename
), emacs_strerror (errno
));
3360 struct buffer
*prev
= current_buffer
;
3361 Lisp_Object workbuf
;
3364 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3366 workbuf
= Fget_buffer_create (build_string (" *code-converting-work*"));
3367 buf
= XBUFFER (workbuf
);
3369 delete_all_overlays (buf
);
3370 BVAR (buf
, directory
) = BVAR (current_buffer
, directory
);
3371 BVAR (buf
, read_only
) = Qnil
;
3372 BVAR (buf
, filename
) = Qnil
;
3373 BVAR (buf
, undo_list
) = Qt
;
3374 eassert (buf
->overlays_before
== NULL
);
3375 eassert (buf
->overlays_after
== NULL
);
3377 set_buffer_internal (buf
);
3379 BVAR (buf
, enable_multibyte_characters
) = Qnil
;
3381 insert_1_both ((char *) read_buf
, nread
, nread
, 0, 0, 0);
3382 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3383 coding_system
= call2 (Vset_auto_coding_function
,
3384 filename
, make_number (nread
));
3385 set_buffer_internal (prev
);
3387 /* Discard the unwind protect for recovering the
3391 /* Rewind the file for the actual read done later. */
3392 if (lseek (fd
, 0, 0) < 0)
3393 report_file_error ("Setting file position",
3394 Fcons (orig_filename
, Qnil
));
3398 if (NILP (coding_system
))
3400 /* If we have not yet decided a coding system, check
3401 file-coding-system-alist. */
3402 Lisp_Object args
[6];
3404 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3405 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3406 coding_system
= Ffind_operation_coding_system (6, args
);
3407 if (CONSP (coding_system
))
3408 coding_system
= XCAR (coding_system
);
3412 if (NILP (coding_system
))
3413 coding_system
= Qundecided
;
3415 CHECK_CODING_SYSTEM (coding_system
);
3417 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3418 /* We must suppress all character code conversion except for
3419 end-of-line conversion. */
3420 coding_system
= raw_text_coding_system (coding_system
);
3422 setup_coding_system (coding_system
, &coding
);
3423 /* Ensure we set Vlast_coding_system_used. */
3424 set_coding_system
= 1;
3427 /* If requested, replace the accessible part of the buffer
3428 with the file contents. Avoid replacing text at the
3429 beginning or end of the buffer that matches the file contents;
3430 that preserves markers pointing to the unchanged parts.
3432 Here we implement this feature in an optimized way
3433 for the case where code conversion is NOT needed.
3434 The following if-statement handles the case of conversion
3435 in a less optimal way.
3437 If the code conversion is "automatic" then we try using this
3438 method and hope for the best.
3439 But if we discover the need for conversion, we give up on this method
3440 and let the following if-statement handle the replace job. */
3443 && (NILP (coding_system
)
3444 || ! CODING_REQUIRE_DECODING (&coding
)))
3446 /* same_at_start and same_at_end count bytes,
3447 because file access counts bytes
3448 and BEG and END count bytes. */
3449 EMACS_INT same_at_start
= BEGV_BYTE
;
3450 EMACS_INT same_at_end
= ZV_BYTE
;
3452 /* There is still a possibility we will find the need to do code
3453 conversion. If that happens, we set this variable to 1 to
3454 give up on handling REPLACE in the optimized way. */
3455 int giveup_match_end
= 0;
3457 if (XINT (beg
) != 0)
3459 if (lseek (fd
, XINT (beg
), 0) < 0)
3460 report_file_error ("Setting file position",
3461 Fcons (orig_filename
, Qnil
));
3466 /* Count how many chars at the start of the file
3467 match the text at the beginning of the buffer. */
3470 EMACS_INT nread
, bufpos
;
3472 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
3474 error ("IO error reading %s: %s",
3475 SSDATA (orig_filename
), emacs_strerror (errno
));
3476 else if (nread
== 0)
3479 if (CODING_REQUIRE_DETECTION (&coding
))
3481 coding_system
= detect_coding_system ((unsigned char *) buffer
,
3484 setup_coding_system (coding_system
, &coding
);
3487 if (CODING_REQUIRE_DECODING (&coding
))
3488 /* We found that the file should be decoded somehow.
3489 Let's give up here. */
3491 giveup_match_end
= 1;
3496 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
3497 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
3498 same_at_start
++, bufpos
++;
3499 /* If we found a discrepancy, stop the scan.
3500 Otherwise loop around and scan the next bufferful. */
3501 if (bufpos
!= nread
)
3505 /* If the file matches the buffer completely,
3506 there's no need to replace anything. */
3507 if (same_at_start
- BEGV_BYTE
== XINT (end
))
3511 /* Truncate the buffer to the size of the file. */
3512 del_range_1 (same_at_start
, same_at_end
, 0, 0);
3517 /* Count how many chars at the end of the file
3518 match the text at the end of the buffer. But, if we have
3519 already found that decoding is necessary, don't waste time. */
3520 while (!giveup_match_end
)
3522 EMACS_INT total_read
, nread
, bufpos
, curpos
, trial
;
3524 /* At what file position are we now scanning? */
3525 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
3526 /* If the entire file matches the buffer tail, stop the scan. */
3529 /* How much can we scan in the next step? */
3530 trial
= min (curpos
, sizeof buffer
);
3531 if (lseek (fd
, curpos
- trial
, 0) < 0)
3532 report_file_error ("Setting file position",
3533 Fcons (orig_filename
, Qnil
));
3535 total_read
= nread
= 0;
3536 while (total_read
< trial
)
3538 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
3540 error ("IO error reading %s: %s",
3541 SDATA (orig_filename
), emacs_strerror (errno
));
3542 else if (nread
== 0)
3544 total_read
+= nread
;
3547 /* Scan this bufferful from the end, comparing with
3548 the Emacs buffer. */
3549 bufpos
= total_read
;
3551 /* Compare with same_at_start to avoid counting some buffer text
3552 as matching both at the file's beginning and at the end. */
3553 while (bufpos
> 0 && same_at_end
> same_at_start
3554 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
3555 same_at_end
--, bufpos
--;
3557 /* If we found a discrepancy, stop the scan.
3558 Otherwise loop around and scan the preceding bufferful. */
3561 /* If this discrepancy is because of code conversion,
3562 we cannot use this method; giveup and try the other. */
3563 if (same_at_end
> same_at_start
3564 && FETCH_BYTE (same_at_end
- 1) >= 0200
3565 && ! NILP (BVAR (current_buffer
, enable_multibyte_characters
))
3566 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
3567 giveup_match_end
= 1;
3576 if (! giveup_match_end
)
3580 /* We win! We can handle REPLACE the optimized way. */
3582 /* Extend the start of non-matching text area to multibyte
3583 character boundary. */
3584 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3585 while (same_at_start
> BEGV_BYTE
3586 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3589 /* Extend the end of non-matching text area to multibyte
3590 character boundary. */
3591 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3592 while (same_at_end
< ZV_BYTE
3593 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
3596 /* Don't try to reuse the same piece of text twice. */
3597 overlap
= (same_at_start
- BEGV_BYTE
3598 - (same_at_end
+ st
.st_size
- ZV
));
3600 same_at_end
+= overlap
;
3602 /* Arrange to read only the nonmatching middle part of the file. */
3603 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
3604 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
3606 del_range_byte (same_at_start
, same_at_end
, 0);
3607 /* Insert from the file at the proper position. */
3608 temp
= BYTE_TO_CHAR (same_at_start
);
3609 SET_PT_BOTH (temp
, same_at_start
);
3611 /* If display currently starts at beginning of line,
3612 keep it that way. */
3613 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
3614 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
3616 replace_handled
= 1;
3620 /* If requested, replace the accessible part of the buffer
3621 with the file contents. Avoid replacing text at the
3622 beginning or end of the buffer that matches the file contents;
3623 that preserves markers pointing to the unchanged parts.
3625 Here we implement this feature for the case where code conversion
3626 is needed, in a simple way that needs a lot of memory.
3627 The preceding if-statement handles the case of no conversion
3628 in a more optimized way. */
3629 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
3631 EMACS_INT same_at_start
= BEGV_BYTE
;
3632 EMACS_INT same_at_end
= ZV_BYTE
;
3633 EMACS_INT same_at_start_charpos
;
3634 EMACS_INT inserted_chars
;
3637 unsigned char *decoded
;
3639 int this_count
= SPECPDL_INDEX ();
3640 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3641 Lisp_Object conversion_buffer
;
3643 conversion_buffer
= code_conversion_save (1, multibyte
);
3645 /* First read the whole file, performing code conversion into
3646 CONVERSION_BUFFER. */
3648 if (lseek (fd
, XINT (beg
), 0) < 0)
3649 report_file_error ("Setting file position",
3650 Fcons (orig_filename
, Qnil
));
3652 total
= st
.st_size
; /* Total bytes in the file. */
3653 how_much
= 0; /* Bytes read from file so far. */
3654 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
3655 unprocessed
= 0; /* Bytes not processed in previous loop. */
3657 GCPRO1 (conversion_buffer
);
3658 while (how_much
< total
)
3660 /* We read one bunch by one (READ_BUF_SIZE bytes) to allow
3661 quitting while reading a huge while. */
3662 /* try is reserved in some compilers (Microsoft C) */
3663 EMACS_INT trytry
= min (total
- how_much
,
3664 READ_BUF_SIZE
- unprocessed
);
3667 /* Allow quitting out of the actual I/O. */
3670 this = emacs_read (fd
, read_buf
+ unprocessed
, trytry
);
3682 BUF_TEMP_SET_PT (XBUFFER (conversion_buffer
),
3683 BUF_Z (XBUFFER (conversion_buffer
)));
3684 decode_coding_c_string (&coding
, (unsigned char *) read_buf
,
3685 unprocessed
+ this, conversion_buffer
);
3686 unprocessed
= coding
.carryover_bytes
;
3687 if (coding
.carryover_bytes
> 0)
3688 memcpy (read_buf
, coding
.carryover
, unprocessed
);
3693 /* We should remove the unwind_protect calling
3694 close_file_unwind, but other stuff has been added the stack,
3695 so defer the removal till we reach the `handled' label. */
3696 deferred_remove_unwind_protect
= 1;
3698 /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0
3699 if we couldn't read the file. */
3702 error ("IO error reading %s: %s",
3703 SDATA (orig_filename
), emacs_strerror (errno
));
3705 if (unprocessed
> 0)
3707 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
3708 decode_coding_c_string (&coding
, (unsigned char *) read_buf
,
3709 unprocessed
, conversion_buffer
);
3710 coding
.mode
&= ~CODING_MODE_LAST_BLOCK
;
3713 coding_system
= CODING_ID_NAME (coding
.id
);
3714 set_coding_system
= 1;
3715 decoded
= BUF_BEG_ADDR (XBUFFER (conversion_buffer
));
3716 inserted
= (BUF_Z_BYTE (XBUFFER (conversion_buffer
))
3717 - BUF_BEG_BYTE (XBUFFER (conversion_buffer
)));
3719 /* Compare the beginning of the converted string with the buffer
3723 while (bufpos
< inserted
&& same_at_start
< same_at_end
3724 && FETCH_BYTE (same_at_start
) == decoded
[bufpos
])
3725 same_at_start
++, bufpos
++;
3727 /* If the file matches the head of buffer completely,
3728 there's no need to replace anything. */
3730 if (bufpos
== inserted
)
3732 /* Truncate the buffer to the size of the file. */
3733 if (same_at_start
== same_at_end
)
3736 del_range_byte (same_at_start
, same_at_end
, 0);
3739 unbind_to (this_count
, Qnil
);
3743 /* Extend the start of non-matching text area to the previous
3744 multibyte character boundary. */
3745 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3746 while (same_at_start
> BEGV_BYTE
3747 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
3750 /* Scan this bufferful from the end, comparing with
3751 the Emacs buffer. */
3754 /* Compare with same_at_start to avoid counting some buffer text
3755 as matching both at the file's beginning and at the end. */
3756 while (bufpos
> 0 && same_at_end
> same_at_start
3757 && FETCH_BYTE (same_at_end
- 1) == decoded
[bufpos
- 1])
3758 same_at_end
--, bufpos
--;
3760 /* Extend the end of non-matching text area to the next
3761 multibyte character boundary. */
3762 if (! NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3763 while (same_at_end
< ZV_BYTE
3764 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
3767 /* Don't try to reuse the same piece of text twice. */
3768 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
3770 same_at_end
+= overlap
;
3772 /* If display currently starts at beginning of line,
3773 keep it that way. */
3774 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
3775 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
3777 /* Replace the chars that we need to replace,
3778 and update INSERTED to equal the number of bytes
3779 we are taking from the decoded string. */
3780 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
3782 if (same_at_end
!= same_at_start
)
3784 del_range_byte (same_at_start
, same_at_end
, 0);
3786 same_at_start
= GPT_BYTE
;
3790 temp
= BYTE_TO_CHAR (same_at_start
);
3792 /* Insert from the file at the proper position. */
3793 SET_PT_BOTH (temp
, same_at_start
);
3794 same_at_start_charpos
3795 = buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
3796 same_at_start
- BEGV_BYTE
3797 + BUF_BEG_BYTE (XBUFFER (conversion_buffer
)));
3799 = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer
),
3800 same_at_start
+ inserted
- BEGV_BYTE
3801 + BUF_BEG_BYTE (XBUFFER (conversion_buffer
)))
3802 - same_at_start_charpos
);
3803 /* This binding is to avoid ask-user-about-supersession-threat
3804 being called in insert_from_buffer (via in
3805 prepare_to_modify_buffer). */
3806 specbind (intern ("buffer-file-name"), Qnil
);
3807 insert_from_buffer (XBUFFER (conversion_buffer
),
3808 same_at_start_charpos
, inserted_chars
, 0);
3809 /* Set `inserted' to the number of inserted characters. */
3810 inserted
= PT
- temp
;
3811 /* Set point before the inserted characters. */
3812 SET_PT_BOTH (temp
, same_at_start
);
3814 unbind_to (this_count
, Qnil
);
3821 register Lisp_Object temp
;
3823 total
= XINT (end
) - XINT (beg
);
3825 /* Make sure point-max won't overflow after this insertion. */
3826 XSETINT (temp
, total
);
3827 if (total
!= XINT (temp
))
3828 error ("Maximum buffer size exceeded");
3831 /* For a special file, all we can do is guess. */
3832 total
= READ_BUF_SIZE
;
3834 if (NILP (visit
) && inserted
> 0)
3836 #ifdef CLASH_DETECTION
3837 if (!NILP (BVAR (current_buffer
, file_truename
))
3838 /* Make binding buffer-file-name to nil effective. */
3839 && !NILP (BVAR (current_buffer
, filename
))
3840 && SAVE_MODIFF
>= MODIFF
)
3842 #endif /* CLASH_DETECTION */
3843 prepare_to_modify_buffer (GPT
, GPT
, NULL
);
3847 if (GAP_SIZE
< total
)
3848 make_gap (total
- GAP_SIZE
);
3850 if (XINT (beg
) != 0 || !NILP (replace
))
3852 if (lseek (fd
, XINT (beg
), 0) < 0)
3853 report_file_error ("Setting file position",
3854 Fcons (orig_filename
, Qnil
));
3857 /* In the following loop, HOW_MUCH contains the total bytes read so
3858 far for a regular file, and not changed for a special file. But,
3859 before exiting the loop, it is set to a negative value if I/O
3863 /* Total bytes inserted. */
3866 /* Here, we don't do code conversion in the loop. It is done by
3867 decode_coding_gap after all data are read into the buffer. */
3869 EMACS_INT gap_size
= GAP_SIZE
;
3871 while (how_much
< total
)
3873 /* try is reserved in some compilers (Microsoft C) */
3874 EMACS_INT trytry
= min (total
- how_much
, READ_BUF_SIZE
);
3881 /* Maybe make more room. */
3882 if (gap_size
< trytry
)
3884 make_gap (total
- gap_size
);
3885 gap_size
= GAP_SIZE
;
3888 /* Read from the file, capturing `quit'. When an
3889 error occurs, end the loop, and arrange for a quit
3890 to be signaled after decoding the text we read. */
3891 non_regular_fd
= fd
;
3892 non_regular_inserted
= inserted
;
3893 non_regular_nbytes
= trytry
;
3894 nbytes
= internal_condition_case_1 (read_non_regular
,
3896 read_non_regular_quit
);
3903 this = XINT (nbytes
);
3907 /* Allow quitting out of the actual I/O. We don't make text
3908 part of the buffer until all the reading is done, so a C-g
3909 here doesn't do any harm. */
3912 this = emacs_read (fd
,
3913 ((char *) BEG_ADDR
+ PT_BYTE
- BEG_BYTE
3927 /* For a regular file, where TOTAL is the real size,
3928 count HOW_MUCH to compare with it.
3929 For a special file, where TOTAL is just a buffer size,
3930 so don't bother counting in HOW_MUCH.
3931 (INSERTED is where we count the number of characters inserted.) */
3938 /* Now we have read all the file data into the gap.
3939 If it was empty, undo marking the buffer modified. */
3943 #ifdef CLASH_DETECTION
3945 unlock_file (BVAR (current_buffer
, file_truename
));
3947 Vdeactivate_mark
= old_Vdeactivate_mark
;
3950 Vdeactivate_mark
= Qt
;
3952 /* Make the text read part of the buffer. */
3953 GAP_SIZE
-= inserted
;
3955 GPT_BYTE
+= inserted
;
3957 ZV_BYTE
+= inserted
;
3962 /* Put an anchor to ensure multi-byte form ends at gap. */
3967 /* Discard the unwind protect for closing the file. */
3971 error ("IO error reading %s: %s",
3972 SDATA (orig_filename
), emacs_strerror (errno
));
3976 if (NILP (coding_system
))
3978 /* The coding system is not yet decided. Decide it by an
3979 optimized method for handling `coding:' tag.
3981 Note that we can get here only if the buffer was empty
3982 before the insertion. */
3984 if (!NILP (Vcoding_system_for_read
))
3985 coding_system
= Vcoding_system_for_read
;
3988 /* Since we are sure that the current buffer was empty
3989 before the insertion, we can toggle
3990 enable-multibyte-characters directly here without taking
3991 care of marker adjustment. By this way, we can run Lisp
3992 program safely before decoding the inserted text. */
3993 Lisp_Object unwind_data
;
3994 int count1
= SPECPDL_INDEX ();
3996 unwind_data
= Fcons (BVAR (current_buffer
, enable_multibyte_characters
),
3997 Fcons (BVAR (current_buffer
, undo_list
),
3998 Fcurrent_buffer ()));
3999 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
4000 BVAR (current_buffer
, undo_list
) = Qt
;
4001 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4003 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4005 coding_system
= call2 (Vset_auto_coding_function
,
4006 filename
, make_number (inserted
));
4009 if (NILP (coding_system
))
4011 /* If the coding system is not yet decided, check
4012 file-coding-system-alist. */
4013 Lisp_Object args
[6];
4015 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4016 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4017 coding_system
= Ffind_operation_coding_system (6, args
);
4018 if (CONSP (coding_system
))
4019 coding_system
= XCAR (coding_system
);
4021 unbind_to (count1
, Qnil
);
4022 inserted
= Z_BYTE
- BEG_BYTE
;
4025 if (NILP (coding_system
))
4026 coding_system
= Qundecided
;
4028 CHECK_CODING_SYSTEM (coding_system
);
4030 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
4031 /* We must suppress all character code conversion except for
4032 end-of-line conversion. */
4033 coding_system
= raw_text_coding_system (coding_system
);
4034 setup_coding_system (coding_system
, &coding
);
4035 /* Ensure we set Vlast_coding_system_used. */
4036 set_coding_system
= 1;
4041 /* When we visit a file by raw-text, we change the buffer to
4043 if (CODING_FOR_UNIBYTE (&coding
)
4044 /* Can't do this if part of the buffer might be preserved. */
4046 /* Visiting a file with these coding system makes the buffer
4048 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
4051 coding
.dst_multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
4052 if (CODING_MAY_REQUIRE_DECODING (&coding
)
4053 && (inserted
> 0 || CODING_REQUIRE_FLUSHING (&coding
)))
4055 move_gap_both (PT
, PT_BYTE
);
4056 GAP_SIZE
+= inserted
;
4057 ZV_BYTE
-= inserted
;
4061 decode_coding_gap (&coding
, inserted
, inserted
);
4062 inserted
= coding
.produced_char
;
4063 coding_system
= CODING_ID_NAME (coding
.id
);
4065 else if (inserted
> 0)
4066 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4069 /* Now INSERTED is measured in characters. */
4073 if (deferred_remove_unwind_protect
)
4074 /* If requested above, discard the unwind protect for closing the
4080 if (!EQ (BVAR (current_buffer
, undo_list
), Qt
) && !nochange
)
4081 BVAR (current_buffer
, undo_list
) = Qnil
;
4085 current_buffer
->modtime
= st
.st_mtime
;
4086 current_buffer
->modtime_size
= st
.st_size
;
4087 BVAR (current_buffer
, filename
) = orig_filename
;
4090 SAVE_MODIFF
= MODIFF
;
4091 BUF_AUTOSAVE_MODIFF (current_buffer
) = MODIFF
;
4092 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4093 #ifdef CLASH_DETECTION
4096 if (!NILP (BVAR (current_buffer
, file_truename
)))
4097 unlock_file (BVAR (current_buffer
, file_truename
));
4098 unlock_file (filename
);
4100 #endif /* CLASH_DETECTION */
4102 xsignal2 (Qfile_error
,
4103 build_string ("not a regular file"), orig_filename
);
4106 if (set_coding_system
)
4107 Vlast_coding_system_used
= coding_system
;
4109 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4111 insval
= call2 (Qafter_insert_file_set_coding
, make_number (inserted
),
4113 if (! NILP (insval
))
4115 CHECK_NUMBER (insval
);
4116 inserted
= XFASTINT (insval
);
4120 /* Decode file format. */
4123 /* Don't run point motion or modification hooks when decoding. */
4124 int count1
= SPECPDL_INDEX ();
4125 EMACS_INT old_inserted
= inserted
;
4126 specbind (Qinhibit_point_motion_hooks
, Qt
);
4127 specbind (Qinhibit_modification_hooks
, Qt
);
4129 /* Save old undo list and don't record undo for decoding. */
4130 old_undo
= BVAR (current_buffer
, undo_list
);
4131 BVAR (current_buffer
, undo_list
) = Qt
;
4135 insval
= call3 (Qformat_decode
,
4136 Qnil
, make_number (inserted
), visit
);
4137 CHECK_NUMBER (insval
);
4138 inserted
= XFASTINT (insval
);
4142 /* If REPLACE is non-nil and we succeeded in not replacing the
4143 beginning or end of the buffer text with the file's contents,
4144 call format-decode with `point' positioned at the beginning
4145 of the buffer and `inserted' equalling the number of
4146 characters in the buffer. Otherwise, format-decode might
4147 fail to correctly analyze the beginning or end of the buffer.
4148 Hence we temporarily save `point' and `inserted' here and
4149 restore `point' iff format-decode did not insert or delete
4150 any text. Otherwise we leave `point' at point-min. */
4151 EMACS_INT opoint
= PT
;
4152 EMACS_INT opoint_byte
= PT_BYTE
;
4153 EMACS_INT oinserted
= ZV
- BEGV
;
4154 int ochars_modiff
= CHARS_MODIFF
;
4156 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
4157 insval
= call3 (Qformat_decode
,
4158 Qnil
, make_number (oinserted
), visit
);
4159 CHECK_NUMBER (insval
);
4160 if (ochars_modiff
== CHARS_MODIFF
)
4161 /* format_decode didn't modify buffer's characters => move
4162 point back to position before inserted text and leave
4163 value of inserted alone. */
4164 SET_PT_BOTH (opoint
, opoint_byte
);
4166 /* format_decode modified buffer's characters => consider
4167 entire buffer changed and leave point at point-min. */
4168 inserted
= XFASTINT (insval
);
4171 /* For consistency with format-decode call these now iff inserted > 0
4172 (martin 2007-06-28). */
4173 p
= Vafter_insert_file_functions
;
4178 insval
= call1 (XCAR (p
), make_number (inserted
));
4181 CHECK_NUMBER (insval
);
4182 inserted
= XFASTINT (insval
);
4187 /* For the rationale of this see the comment on
4188 format-decode above. */
4189 EMACS_INT opoint
= PT
;
4190 EMACS_INT opoint_byte
= PT_BYTE
;
4191 EMACS_INT oinserted
= ZV
- BEGV
;
4192 int ochars_modiff
= CHARS_MODIFF
;
4194 TEMP_SET_PT_BOTH (BEGV
, BEGV_BYTE
);
4195 insval
= call1 (XCAR (p
), make_number (oinserted
));
4198 CHECK_NUMBER (insval
);
4199 if (ochars_modiff
== CHARS_MODIFF
)
4200 /* after_insert_file_functions didn't modify
4201 buffer's characters => move point back to
4202 position before inserted text and leave value of
4204 SET_PT_BOTH (opoint
, opoint_byte
);
4206 /* after_insert_file_functions did modify buffer's
4207 characters => consider entire buffer changed and
4208 leave point at point-min. */
4209 inserted
= XFASTINT (insval
);
4219 BVAR (current_buffer
, undo_list
) = old_undo
;
4220 if (CONSP (old_undo
) && inserted
!= old_inserted
)
4222 /* Adjust the last undo record for the size change during
4223 the format conversion. */
4224 Lisp_Object tem
= XCAR (old_undo
);
4225 if (CONSP (tem
) && INTEGERP (XCAR (tem
))
4226 && INTEGERP (XCDR (tem
))
4227 && XFASTINT (XCDR (tem
)) == PT
+ old_inserted
)
4228 XSETCDR (tem
, make_number (PT
+ inserted
));
4232 /* If undo_list was Qt before, keep it that way.
4233 Otherwise start with an empty undo_list. */
4234 BVAR (current_buffer
, undo_list
) = EQ (old_undo
, Qt
) ? Qt
: Qnil
;
4236 unbind_to (count1
, Qnil
);
4239 /* Call after-change hooks for the inserted text, aside from the case
4240 of normal visiting (not with REPLACE), which is done in a new buffer
4241 "before" the buffer is changed. */
4242 if (inserted
> 0 && total
> 0
4243 && (NILP (visit
) || !NILP (replace
)))
4245 signal_after_change (PT
, 0, inserted
);
4246 update_compositions (PT
, PT
, CHECK_BORDER
);
4250 && current_buffer
->modtime
== -1)
4252 /* If visiting nonexistent file, return nil. */
4253 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4257 Fsignal (Qquit
, Qnil
);
4259 /* ??? Retval needs to be dealt with in all cases consistently. */
4261 val
= Fcons (orig_filename
,
4262 Fcons (make_number (inserted
),
4265 RETURN_UNGCPRO (unbind_to (count
, val
));
4268 static Lisp_Object
build_annotations (Lisp_Object
, Lisp_Object
);
4271 build_annotations_unwind (Lisp_Object arg
)
4273 Vwrite_region_annotation_buffers
= arg
;
4277 /* Decide the coding-system to encode the data with. */
4280 choose_write_coding_system (Lisp_Object start
, Lisp_Object end
, Lisp_Object filename
,
4281 Lisp_Object append
, Lisp_Object visit
, Lisp_Object lockname
,
4282 struct coding_system
*coding
)
4285 Lisp_Object eol_parent
= Qnil
;
4288 && NILP (Fstring_equal (BVAR (current_buffer
, filename
),
4289 BVAR (current_buffer
, auto_save_file_name
))))
4294 else if (!NILP (Vcoding_system_for_write
))
4296 val
= Vcoding_system_for_write
;
4297 if (coding_system_require_warning
4298 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4299 /* Confirm that VAL can surely encode the current region. */
4300 val
= call5 (Vselect_safe_coding_system_function
,
4301 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4306 /* If the variable `buffer-file-coding-system' is set locally,
4307 it means that the file was read with some kind of code
4308 conversion or the variable is explicitly set by users. We
4309 had better write it out with the same coding system even if
4310 `enable-multibyte-characters' is nil.
4312 If it is not set locally, we anyway have to convert EOL
4313 format if the default value of `buffer-file-coding-system'
4314 tells that it is not Unix-like (LF only) format. */
4315 int using_default_coding
= 0;
4316 int force_raw_text
= 0;
4318 val
= BVAR (current_buffer
, buffer_file_coding_system
);
4320 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4323 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
4329 /* Check file-coding-system-alist. */
4330 Lisp_Object args
[7], coding_systems
;
4332 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4333 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4335 coding_systems
= Ffind_operation_coding_system (7, args
);
4336 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4337 val
= XCDR (coding_systems
);
4342 /* If we still have not decided a coding system, use the
4343 default value of buffer-file-coding-system. */
4344 val
= BVAR (current_buffer
, buffer_file_coding_system
);
4345 using_default_coding
= 1;
4348 if (! NILP (val
) && ! force_raw_text
)
4350 Lisp_Object spec
, attrs
;
4352 CHECK_CODING_SYSTEM_GET_SPEC (val
, spec
);
4353 attrs
= AREF (spec
, 0);
4354 if (EQ (CODING_ATTR_TYPE (attrs
), Qraw_text
))
4359 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4360 /* Confirm that VAL can surely encode the current region. */
4361 val
= call5 (Vselect_safe_coding_system_function
,
4362 start
, end
, val
, Qnil
, filename
);
4364 /* If the decided coding-system doesn't specify end-of-line
4365 format, we use that of
4366 `default-buffer-file-coding-system'. */
4367 if (! using_default_coding
4368 && ! NILP (BVAR (&buffer_defaults
, buffer_file_coding_system
)))
4369 val
= (coding_inherit_eol_type
4370 (val
, BVAR (&buffer_defaults
, buffer_file_coding_system
)));
4372 /* If we decide not to encode text, use `raw-text' or one of its
4375 val
= raw_text_coding_system (val
);
4378 val
= coding_inherit_eol_type (val
, eol_parent
);
4379 setup_coding_system (val
, coding
);
4381 if (!STRINGP (start
) && !NILP (BVAR (current_buffer
, selective_display
)))
4382 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4386 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4387 "r\nFWrite region to file: \ni\ni\ni\np",
4388 doc
: /* Write current region into specified file.
4389 When called from a program, requires three arguments:
4390 START, END and FILENAME. START and END are normally buffer positions
4391 specifying the part of the buffer to write.
4392 If START is nil, that means to use the entire buffer contents.
4393 If START is a string, then output that string to the file
4394 instead of any buffer contents; END is ignored.
4396 Optional fourth argument APPEND if non-nil means
4397 append to existing file contents (if any). If it is an integer,
4398 seek to that offset in the file before writing.
4399 Optional fifth argument VISIT, if t or a string, means
4400 set the last-save-file-modtime of buffer to this file's modtime
4401 and mark buffer not modified.
4402 If VISIT is a string, it is a second file name;
4403 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4404 VISIT is also the file name to lock and unlock for clash detection.
4405 If VISIT is neither t nor nil nor a string,
4406 that means do not display the \"Wrote file\" message.
4407 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4408 use for locking and unlocking, overriding FILENAME and VISIT.
4409 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4410 for an existing file with the same name. If MUSTBENEW is `excl',
4411 that means to get an error if the file already exists; never overwrite.
4412 If MUSTBENEW is neither nil nor `excl', that means ask for
4413 confirmation before overwriting, but do go ahead and overwrite the file
4414 if the user confirms.
4416 This does code conversion according to the value of
4417 `coding-system-for-write', `buffer-file-coding-system', or
4418 `file-coding-system-alist', and sets the variable
4419 `last-coding-system-used' to the coding system actually used.
4421 This calls `write-region-annotate-functions' at the start, and
4422 `write-region-post-annotation-function' at the end. */)
4423 (Lisp_Object start
, Lisp_Object end
, Lisp_Object filename
, Lisp_Object append
, Lisp_Object visit
, Lisp_Object lockname
, Lisp_Object mustbenew
)
4430 int count
= SPECPDL_INDEX ();
4432 Lisp_Object handler
;
4433 Lisp_Object visit_file
;
4434 Lisp_Object annotations
;
4435 Lisp_Object encoded_filename
;
4436 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4437 int quietly
= !NILP (visit
);
4438 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4439 struct buffer
*given_buffer
;
4440 struct coding_system coding
;
4442 if (current_buffer
->base_buffer
&& visiting
)
4443 error ("Cannot do file visiting in an indirect buffer");
4445 if (!NILP (start
) && !STRINGP (start
))
4446 validate_region (&start
, &end
);
4449 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
4451 filename
= Fexpand_file_name (filename
, Qnil
);
4453 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4454 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4456 if (STRINGP (visit
))
4457 visit_file
= Fexpand_file_name (visit
, Qnil
);
4459 visit_file
= filename
;
4461 if (NILP (lockname
))
4462 lockname
= visit_file
;
4466 /* If the file name has special constructs in it,
4467 call the corresponding file handler. */
4468 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4469 /* If FILENAME has no handler, see if VISIT has one. */
4470 if (NILP (handler
) && STRINGP (visit
))
4471 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4473 if (!NILP (handler
))
4476 val
= call6 (handler
, Qwrite_region
, start
, end
,
4477 filename
, append
, visit
);
4481 SAVE_MODIFF
= MODIFF
;
4482 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4483 BVAR (current_buffer
, filename
) = visit_file
;
4489 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
4491 /* Special kludge to simplify auto-saving. */
4494 /* Do it later, so write-region-annotate-function can work differently
4495 if we save "the buffer" vs "a region".
4496 This is useful in tar-mode. --Stef
4497 XSETFASTINT (start, BEG);
4498 XSETFASTINT (end, Z); */
4502 record_unwind_protect (build_annotations_unwind
,
4503 Vwrite_region_annotation_buffers
);
4504 Vwrite_region_annotation_buffers
= Fcons (Fcurrent_buffer (), Qnil
);
4505 count1
= SPECPDL_INDEX ();
4507 given_buffer
= current_buffer
;
4509 if (!STRINGP (start
))
4511 annotations
= build_annotations (start
, end
);
4513 if (current_buffer
!= given_buffer
)
4515 XSETFASTINT (start
, BEGV
);
4516 XSETFASTINT (end
, ZV
);
4522 XSETFASTINT (start
, BEGV
);
4523 XSETFASTINT (end
, ZV
);
4528 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4530 /* Decide the coding-system to encode the data with.
4531 We used to make this choice before calling build_annotations, but that
4532 leads to problems when a write-annotate-function takes care of
4533 unsavable chars (as was the case with X-Symbol). */
4534 Vlast_coding_system_used
4535 = choose_write_coding_system (start
, end
, filename
,
4536 append
, visit
, lockname
, &coding
);
4538 #ifdef CLASH_DETECTION
4540 lock_file (lockname
);
4541 #endif /* CLASH_DETECTION */
4543 encoded_filename
= ENCODE_FILE (filename
);
4545 fn
= SSDATA (encoded_filename
);
4549 desc
= emacs_open (fn
, O_WRONLY
| O_BINARY
, 0);
4550 #else /* not DOS_NT */
4551 desc
= emacs_open (fn
, O_WRONLY
, 0);
4552 #endif /* not DOS_NT */
4554 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
4556 desc
= emacs_open (fn
,
4557 O_WRONLY
| O_CREAT
| O_BINARY
4558 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
4559 S_IREAD
| S_IWRITE
);
4560 #else /* not DOS_NT */
4561 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
4562 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
4563 auto_saving
? auto_save_mode_bits
: 0666);
4564 #endif /* not DOS_NT */
4568 #ifdef CLASH_DETECTION
4570 if (!auto_saving
) unlock_file (lockname
);
4572 #endif /* CLASH_DETECTION */
4574 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
4577 record_unwind_protect (close_file_unwind
, make_number (desc
));
4579 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
4583 if (NUMBERP (append
))
4584 ret
= lseek (desc
, XINT (append
), 1);
4586 ret
= lseek (desc
, 0, 2);
4589 #ifdef CLASH_DETECTION
4590 if (!auto_saving
) unlock_file (lockname
);
4591 #endif /* CLASH_DETECTION */
4593 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
4602 if (STRINGP (start
))
4604 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
4605 &annotations
, &coding
);
4608 else if (XINT (start
) != XINT (end
))
4610 failure
= 0 > a_write (desc
, Qnil
,
4611 XINT (start
), XINT (end
) - XINT (start
),
4612 &annotations
, &coding
);
4617 /* If file was empty, still need to write the annotations */
4618 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4619 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
4623 if (CODING_REQUIRE_FLUSHING (&coding
)
4624 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
4627 /* We have to flush out a data. */
4628 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4629 failure
= 0 > e_write (desc
, Qnil
, 1, 1, &coding
);
4636 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
4637 Disk full in NFS may be reported here. */
4638 /* mib says that closing the file will try to write as fast as NFS can do
4639 it, and that means the fsync here is not crucial for autosave files. */
4640 if (!auto_saving
&& !write_region_inhibit_fsync
&& fsync (desc
) < 0)
4642 /* If fsync fails with EINTR, don't treat that as serious. Also
4643 ignore EINVAL which happens when fsync is not supported on this
4645 if (errno
!= EINTR
&& errno
!= EINVAL
)
4646 failure
= 1, save_errno
= errno
;
4650 /* NFS can report a write failure now. */
4651 if (emacs_close (desc
) < 0)
4652 failure
= 1, save_errno
= errno
;
4656 /* Discard the unwind protect for close_file_unwind. */
4657 specpdl_ptr
= specpdl
+ count1
;
4659 /* Call write-region-post-annotation-function. */
4660 while (CONSP (Vwrite_region_annotation_buffers
))
4662 Lisp_Object buf
= XCAR (Vwrite_region_annotation_buffers
);
4663 if (!NILP (Fbuffer_live_p (buf
)))
4666 if (FUNCTIONP (Vwrite_region_post_annotation_function
))
4667 call0 (Vwrite_region_post_annotation_function
);
4669 Vwrite_region_annotation_buffers
4670 = XCDR (Vwrite_region_annotation_buffers
);
4673 unbind_to (count
, Qnil
);
4675 #ifdef CLASH_DETECTION
4677 unlock_file (lockname
);
4678 #endif /* CLASH_DETECTION */
4680 /* Do this before reporting IO error
4681 to avoid a "file has changed on disk" warning on
4682 next attempt to save. */
4685 current_buffer
->modtime
= st
.st_mtime
;
4686 current_buffer
->modtime_size
= st
.st_size
;
4690 error ("IO error writing %s: %s", SDATA (filename
),
4691 emacs_strerror (save_errno
));
4695 SAVE_MODIFF
= MODIFF
;
4696 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
4697 BVAR (current_buffer
, filename
) = visit_file
;
4698 update_mode_lines
++;
4703 && ! NILP (Fstring_equal (BVAR (current_buffer
, filename
),
4704 BVAR (current_buffer
, auto_save_file_name
))))
4705 SAVE_MODIFF
= MODIFF
;
4711 message_with_string ((INTEGERP (append
)
4721 Lisp_Object
merge (Lisp_Object
, Lisp_Object
, Lisp_Object
);
4723 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
4724 doc
: /* Return t if (car A) is numerically less than (car B). */)
4725 (Lisp_Object a
, Lisp_Object b
)
4727 return Flss (Fcar (a
), Fcar (b
));
4730 /* Build the complete list of annotations appropriate for writing out
4731 the text between START and END, by calling all the functions in
4732 write-region-annotate-functions and merging the lists they return.
4733 If one of these functions switches to a different buffer, we assume
4734 that buffer contains altered text. Therefore, the caller must
4735 make sure to restore the current buffer in all cases,
4736 as save-excursion would do. */
4739 build_annotations (Lisp_Object start
, Lisp_Object end
)
4741 Lisp_Object annotations
;
4743 struct gcpro gcpro1
, gcpro2
;
4744 Lisp_Object original_buffer
;
4745 int i
, used_global
= 0;
4747 XSETBUFFER (original_buffer
, current_buffer
);
4750 p
= Vwrite_region_annotate_functions
;
4751 GCPRO2 (annotations
, p
);
4754 struct buffer
*given_buffer
= current_buffer
;
4755 if (EQ (Qt
, XCAR (p
)) && !used_global
)
4756 { /* Use the global value of the hook. */
4759 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
4761 p
= Fappend (2, arg
);
4764 Vwrite_region_annotations_so_far
= annotations
;
4765 res
= call2 (XCAR (p
), start
, end
);
4766 /* If the function makes a different buffer current,
4767 assume that means this buffer contains altered text to be output.
4768 Reset START and END from the buffer bounds
4769 and discard all previous annotations because they should have
4770 been dealt with by this function. */
4771 if (current_buffer
!= given_buffer
)
4773 Vwrite_region_annotation_buffers
4774 = Fcons (Fcurrent_buffer (),
4775 Vwrite_region_annotation_buffers
);
4776 XSETFASTINT (start
, BEGV
);
4777 XSETFASTINT (end
, ZV
);
4780 Flength (res
); /* Check basic validity of return value */
4781 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4785 /* Now do the same for annotation functions implied by the file-format */
4786 if (auto_saving
&& (!EQ (BVAR (current_buffer
, auto_save_file_format
), Qt
)))
4787 p
= BVAR (current_buffer
, auto_save_file_format
);
4789 p
= BVAR (current_buffer
, file_format
);
4790 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
4792 struct buffer
*given_buffer
= current_buffer
;
4794 Vwrite_region_annotations_so_far
= annotations
;
4796 /* Value is either a list of annotations or nil if the function
4797 has written annotations to a temporary buffer, which is now
4799 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
4800 original_buffer
, make_number (i
));
4801 if (current_buffer
!= given_buffer
)
4803 XSETFASTINT (start
, BEGV
);
4804 XSETFASTINT (end
, ZV
);
4809 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
4817 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
4818 If STRING is nil, POS is the character position in the current buffer.
4819 Intersperse with them the annotations from *ANNOT
4820 which fall within the range of POS to POS + NCHARS,
4821 each at its appropriate position.
4823 We modify *ANNOT by discarding elements as we use them up.
4825 The return value is negative in case of system call failure. */
4828 a_write (int desc
, Lisp_Object string
, int pos
, register int nchars
, Lisp_Object
*annot
, struct coding_system
*coding
)
4832 int lastpos
= pos
+ nchars
;
4834 while (NILP (*annot
) || CONSP (*annot
))
4836 tem
= Fcar_safe (Fcar (*annot
));
4839 nextpos
= XFASTINT (tem
);
4841 /* If there are no more annotations in this range,
4842 output the rest of the range all at once. */
4843 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
4844 return e_write (desc
, string
, pos
, lastpos
, coding
);
4846 /* Output buffer text up to the next annotation's position. */
4849 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
4853 /* Output the annotation. */
4854 tem
= Fcdr (Fcar (*annot
));
4857 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
4860 *annot
= Fcdr (*annot
);
4866 /* Write text in the range START and END into descriptor DESC,
4867 encoding them with coding system CODING. If STRING is nil, START
4868 and END are character positions of the current buffer, else they
4869 are indexes to the string STRING. */
4872 e_write (int desc
, Lisp_Object string
, int start
, int end
, struct coding_system
*coding
)
4874 if (STRINGP (string
))
4877 end
= SCHARS (string
);
4880 /* We used to have a code for handling selective display here. But,
4881 now it is handled within encode_coding. */
4885 if (STRINGP (string
))
4887 coding
->src_multibyte
= SCHARS (string
) < SBYTES (string
);
4888 if (CODING_REQUIRE_ENCODING (coding
))
4890 encode_coding_object (coding
, string
,
4891 start
, string_char_to_byte (string
, start
),
4892 end
, string_char_to_byte (string
, end
), Qt
);
4896 coding
->dst_object
= string
;
4897 coding
->consumed_char
= SCHARS (string
);
4898 coding
->produced
= SBYTES (string
);
4903 int start_byte
= CHAR_TO_BYTE (start
);
4904 int end_byte
= CHAR_TO_BYTE (end
);
4906 coding
->src_multibyte
= (end
- start
) < (end_byte
- start_byte
);
4907 if (CODING_REQUIRE_ENCODING (coding
))
4909 encode_coding_object (coding
, Fcurrent_buffer (),
4910 start
, start_byte
, end
, end_byte
, Qt
);
4914 coding
->dst_object
= Qnil
;
4915 coding
->dst_pos_byte
= start_byte
;
4916 if (start
>= GPT
|| end
<= GPT
)
4918 coding
->consumed_char
= end
- start
;
4919 coding
->produced
= end_byte
- start_byte
;
4923 coding
->consumed_char
= GPT
- start
;
4924 coding
->produced
= GPT_BYTE
- start_byte
;
4929 if (coding
->produced
> 0)
4933 STRINGP (coding
->dst_object
)
4934 ? SSDATA (coding
->dst_object
)
4935 : (char *) BYTE_POS_ADDR (coding
->dst_pos_byte
),
4938 if (coding
->produced
)
4941 start
+= coding
->consumed_char
;
4947 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
4948 Sverify_visited_file_modtime
, 0, 1, 0,
4949 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
4950 This means that the file has not been changed since it was visited or saved.
4951 If BUF is omitted or nil, it defaults to the current buffer.
4952 See Info node `(elisp)Modification Time' for more details. */)
4957 Lisp_Object handler
;
4958 Lisp_Object filename
;
4968 if (!STRINGP (BVAR (b
, filename
))) return Qt
;
4969 if (b
->modtime
== 0) return Qt
;
4971 /* If the file name has special constructs in it,
4972 call the corresponding file handler. */
4973 handler
= Ffind_file_name_handler (BVAR (b
, filename
),
4974 Qverify_visited_file_modtime
);
4975 if (!NILP (handler
))
4976 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
4978 filename
= ENCODE_FILE (BVAR (b
, filename
));
4980 if (stat (SSDATA (filename
), &st
) < 0)
4982 /* If the file doesn't exist now and didn't exist before,
4983 we say that it isn't modified, provided the error is a tame one. */
4984 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
4989 if ((st
.st_mtime
== b
->modtime
4990 /* If both are positive, accept them if they are off by one second. */
4991 || (st
.st_mtime
> 0 && b
->modtime
> 0
4992 && (st
.st_mtime
== b
->modtime
+ 1
4993 || st
.st_mtime
== b
->modtime
- 1)))
4994 && (st
.st_size
== b
->modtime_size
4995 || b
->modtime_size
< 0))
5000 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5001 Sclear_visited_file_modtime
, 0, 0, 0,
5002 doc
: /* Clear out records of last mod time of visited file.
5003 Next attempt to save will certainly not complain of a discrepancy. */)
5006 current_buffer
->modtime
= 0;
5007 current_buffer
->modtime_size
= -1;
5011 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5012 Svisited_file_modtime
, 0, 0, 0,
5013 doc
: /* Return the current buffer's recorded visited file modification time.
5014 The value is a list of the form (HIGH LOW), like the time values
5015 that `file-attributes' returns. If the current buffer has no recorded
5016 file modification time, this function returns 0.
5017 See Info node `(elisp)Modification Time' for more details. */)
5020 if (! current_buffer
->modtime
)
5021 return make_number (0);
5022 return make_time ((time_t) current_buffer
->modtime
);
5025 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5026 Sset_visited_file_modtime
, 0, 1, 0,
5027 doc
: /* Update buffer's recorded modification time from the visited file's time.
5028 Useful if the buffer was not read from the file normally
5029 or if the file itself has been changed for some known benign reason.
5030 An argument specifies the modification time value to use
5031 \(instead of that of the visited file), in the form of a list
5032 \(HIGH . LOW) or (HIGH LOW). */)
5033 (Lisp_Object time_list
)
5035 if (!NILP (time_list
))
5037 current_buffer
->modtime
= cons_to_long (time_list
);
5038 current_buffer
->modtime_size
= -1;
5042 register Lisp_Object filename
;
5044 Lisp_Object handler
;
5046 filename
= Fexpand_file_name (BVAR (current_buffer
, filename
), Qnil
);
5048 /* If the file name has special constructs in it,
5049 call the corresponding file handler. */
5050 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5051 if (!NILP (handler
))
5052 /* The handler can find the file name the same way we did. */
5053 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5055 filename
= ENCODE_FILE (filename
);
5057 if (stat (SSDATA (filename
), &st
) >= 0)
5059 current_buffer
->modtime
= st
.st_mtime
;
5060 current_buffer
->modtime_size
= st
.st_size
;
5068 auto_save_error (Lisp_Object error_val
)
5070 Lisp_Object args
[3], msg
;
5072 struct gcpro gcpro1
;
5076 auto_save_error_occurred
= 1;
5078 ring_bell (XFRAME (selected_frame
));
5080 args
[0] = build_string ("Auto-saving %s: %s");
5081 args
[1] = BVAR (current_buffer
, name
);
5082 args
[2] = Ferror_message_string (error_val
);
5083 msg
= Fformat (3, args
);
5085 nbytes
= SBYTES (msg
);
5086 SAFE_ALLOCA (msgbuf
, char *, nbytes
);
5087 memcpy (msgbuf
, SDATA (msg
), nbytes
);
5089 for (i
= 0; i
< 3; ++i
)
5092 message2 (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5094 message2_nolog (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5095 Fsleep_for (make_number (1), Qnil
);
5109 auto_save_mode_bits
= 0666;
5111 /* Get visited file's mode to become the auto save file's mode. */
5112 if (! NILP (BVAR (current_buffer
, filename
)))
5114 if (stat (SSDATA (BVAR (current_buffer
, filename
)), &st
) >= 0)
5115 /* But make sure we can overwrite it later! */
5116 auto_save_mode_bits
= st
.st_mode
| 0600;
5117 else if ((modes
= Ffile_modes (BVAR (current_buffer
, filename
)),
5119 /* Remote files don't cooperate with stat. */
5120 auto_save_mode_bits
= XINT (modes
) | 0600;
5124 Fwrite_region (Qnil
, Qnil
, BVAR (current_buffer
, auto_save_file_name
), Qnil
,
5125 NILP (Vauto_save_visited_file_name
) ? Qlambda
: Qt
,
5130 do_auto_save_unwind (Lisp_Object arg
) /* used as unwind-protect function */
5133 FILE *stream
= (FILE *) XSAVE_VALUE (arg
)->pointer
;
5145 do_auto_save_unwind_1 (Lisp_Object value
) /* used as unwind-protect function */
5148 minibuffer_auto_raise
= XINT (value
);
5153 do_auto_save_make_dir (Lisp_Object dir
)
5157 call2 (Qmake_directory
, dir
, Qt
);
5158 XSETFASTINT (mode
, 0700);
5159 return Fset_file_modes (dir
, mode
);
5163 do_auto_save_eh (Lisp_Object ignore
)
5168 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5169 doc
: /* Auto-save all buffers that need it.
5170 This is all buffers that have auto-saving enabled
5171 and are changed since last auto-saved.
5172 Auto-saving writes the buffer into a file
5173 so that your editing is not lost if the system crashes.
5174 This file is not the file you visited; that changes only when you save.
5175 Normally we run the normal hook `auto-save-hook' before saving.
5177 A non-nil NO-MESSAGE argument means do not print any message if successful.
5178 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5179 (Lisp_Object no_message
, Lisp_Object current_only
)
5181 struct buffer
*old
= current_buffer
, *b
;
5182 Lisp_Object tail
, buf
, hook
;
5184 int do_handled_files
;
5186 FILE *stream
= NULL
;
5187 int count
= SPECPDL_INDEX ();
5188 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5189 int old_message_p
= 0;
5190 struct gcpro gcpro1
, gcpro2
;
5192 if (max_specpdl_size
< specpdl_size
+ 40)
5193 max_specpdl_size
= specpdl_size
+ 40;
5198 if (NILP (no_message
))
5200 old_message_p
= push_message ();
5201 record_unwind_protect (pop_message_unwind
, Qnil
);
5204 /* Ordinarily don't quit within this function,
5205 but don't make it impossible to quit (in case we get hung in I/O). */
5209 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5210 point to non-strings reached from Vbuffer_alist. */
5212 hook
= intern ("auto-save-hook");
5213 Frun_hooks (1, &hook
);
5215 if (STRINGP (Vauto_save_list_file_name
))
5217 Lisp_Object listfile
;
5219 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5221 /* Don't try to create the directory when shutting down Emacs,
5222 because creating the directory might signal an error, and
5223 that would leave Emacs in a strange state. */
5224 if (!NILP (Vrun_hooks
))
5228 GCPRO2 (dir
, listfile
);
5229 dir
= Ffile_name_directory (listfile
);
5230 if (NILP (Ffile_directory_p (dir
)))
5231 internal_condition_case_1 (do_auto_save_make_dir
,
5232 dir
, Fcons (Fcons (Qfile_error
, Qnil
), Qnil
),
5237 stream
= fopen (SSDATA (listfile
), "w");
5240 record_unwind_protect (do_auto_save_unwind
,
5241 make_save_value (stream
, 0));
5242 record_unwind_protect (do_auto_save_unwind_1
,
5243 make_number (minibuffer_auto_raise
));
5244 minibuffer_auto_raise
= 0;
5246 auto_save_error_occurred
= 0;
5248 /* On first pass, save all files that don't have handlers.
5249 On second pass, save all files that do have handlers.
5251 If Emacs is crashing, the handlers may tweak what is causing
5252 Emacs to crash in the first place, and it would be a shame if
5253 Emacs failed to autosave perfectly ordinary files because it
5254 couldn't handle some ange-ftp'd file. */
5256 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5257 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
5259 buf
= XCDR (XCAR (tail
));
5262 /* Record all the buffers that have auto save mode
5263 in the special file that lists them. For each of these buffers,
5264 Record visited name (if any) and auto save name. */
5265 if (STRINGP (BVAR (b
, auto_save_file_name
))
5266 && stream
!= NULL
&& do_handled_files
== 0)
5269 if (!NILP (BVAR (b
, filename
)))
5271 fwrite (SDATA (BVAR (b
, filename
)), 1,
5272 SBYTES (BVAR (b
, filename
)), stream
);
5274 putc ('\n', stream
);
5275 fwrite (SDATA (BVAR (b
, auto_save_file_name
)), 1,
5276 SBYTES (BVAR (b
, auto_save_file_name
)), stream
);
5277 putc ('\n', stream
);
5281 if (!NILP (current_only
)
5282 && b
!= current_buffer
)
5285 /* Don't auto-save indirect buffers.
5286 The base buffer takes care of it. */
5290 /* Check for auto save enabled
5291 and file changed since last auto save
5292 and file changed since last real save. */
5293 if (STRINGP (BVAR (b
, auto_save_file_name
))
5294 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5295 && BUF_AUTOSAVE_MODIFF (b
) < BUF_MODIFF (b
)
5296 /* -1 means we've turned off autosaving for a while--see below. */
5297 && XINT (BVAR (b
, save_length
)) >= 0
5298 && (do_handled_files
5299 || NILP (Ffind_file_name_handler (BVAR (b
, auto_save_file_name
),
5302 EMACS_TIME before_time
, after_time
;
5304 EMACS_GET_TIME (before_time
);
5306 /* If we had a failure, don't try again for 20 minutes. */
5307 if (b
->auto_save_failure_time
>= 0
5308 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5311 set_buffer_internal (b
);
5312 if (NILP (Vauto_save_include_big_deletions
)
5313 && (XFASTINT (BVAR (b
, save_length
)) * 10
5314 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5315 /* A short file is likely to change a large fraction;
5316 spare the user annoying messages. */
5317 && XFASTINT (BVAR (b
, save_length
)) > 5000
5318 /* These messages are frequent and annoying for `*mail*'. */
5319 && !EQ (BVAR (b
, filename
), Qnil
)
5320 && NILP (no_message
))
5322 /* It has shrunk too much; turn off auto-saving here. */
5323 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5324 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
5326 minibuffer_auto_raise
= 0;
5327 /* Turn off auto-saving until there's a real save,
5328 and prevent any more warnings. */
5329 XSETINT (BVAR (b
, save_length
), -1);
5330 Fsleep_for (make_number (1), Qnil
);
5333 if (!auto_saved
&& NILP (no_message
))
5334 message1 ("Auto-saving...");
5335 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5337 BUF_AUTOSAVE_MODIFF (b
) = BUF_MODIFF (b
);
5338 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
5339 set_buffer_internal (old
);
5341 EMACS_GET_TIME (after_time
);
5343 /* If auto-save took more than 60 seconds,
5344 assume it was an NFS failure that got a timeout. */
5345 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5346 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5350 /* Prevent another auto save till enough input events come in. */
5351 record_auto_save ();
5353 if (auto_saved
&& NILP (no_message
))
5357 /* If we are going to restore an old message,
5358 give time to read ours. */
5359 sit_for (make_number (1), 0, 0);
5362 else if (!auto_save_error_occurred
)
5363 /* Don't overwrite the error message if an error occurred.
5364 If we displayed a message and then restored a state
5365 with no message, leave a "done" message on the screen. */
5366 message1 ("Auto-saving...done");
5371 /* This restores the message-stack status. */
5372 unbind_to (count
, Qnil
);
5376 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5377 Sset_buffer_auto_saved
, 0, 0, 0,
5378 doc
: /* Mark current buffer as auto-saved with its current text.
5379 No auto-save file will be written until the buffer changes again. */)
5382 /* FIXME: This should not be called in indirect buffers, since
5383 they're not autosaved. */
5384 BUF_AUTOSAVE_MODIFF (current_buffer
) = MODIFF
;
5385 XSETFASTINT (BVAR (current_buffer
, save_length
), Z
- BEG
);
5386 current_buffer
->auto_save_failure_time
= -1;
5390 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
5391 Sclear_buffer_auto_save_failure
, 0, 0, 0,
5392 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
5395 current_buffer
->auto_save_failure_time
= -1;
5399 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
5401 doc
: /* Return t if current buffer has been auto-saved recently.
5402 More precisely, if it has been auto-saved since last read from or saved
5403 in the visited file. If the buffer has no visited file,
5404 then any auto-save counts as "recent". */)
5407 /* FIXME: maybe we should return nil for indirect buffers since
5408 they're never autosaved. */
5409 return (SAVE_MODIFF
< BUF_AUTOSAVE_MODIFF (current_buffer
) ? Qt
: Qnil
);
5412 /* Reading and completing file names */
5414 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
5415 Snext_read_file_uses_dialog_p
, 0, 0, 0,
5416 doc
: /* Return t if a call to `read-file-name' will use a dialog.
5417 The return value is only relevant for a call to `read-file-name' that happens
5418 before any other event (mouse or keypress) is handled. */)
5421 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK)
5422 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
5432 Fread_file_name (Lisp_Object prompt
, Lisp_Object dir
, Lisp_Object default_filename
, Lisp_Object mustmatch
, Lisp_Object initial
, Lisp_Object predicate
)
5434 struct gcpro gcpro1
;
5435 Lisp_Object args
[7];
5437 GCPRO1 (default_filename
);
5438 args
[0] = intern ("read-file-name");
5441 args
[3] = default_filename
;
5442 args
[4] = mustmatch
;
5444 args
[6] = predicate
;
5445 RETURN_UNGCPRO (Ffuncall (7, args
));
5450 syms_of_fileio (void)
5452 Qoperations
= intern_c_string ("operations");
5453 Qexpand_file_name
= intern_c_string ("expand-file-name");
5454 Qsubstitute_in_file_name
= intern_c_string ("substitute-in-file-name");
5455 Qdirectory_file_name
= intern_c_string ("directory-file-name");
5456 Qfile_name_directory
= intern_c_string ("file-name-directory");
5457 Qfile_name_nondirectory
= intern_c_string ("file-name-nondirectory");
5458 Qunhandled_file_name_directory
= intern_c_string ("unhandled-file-name-directory");
5459 Qfile_name_as_directory
= intern_c_string ("file-name-as-directory");
5460 Qcopy_file
= intern_c_string ("copy-file");
5461 Qmake_directory_internal
= intern_c_string ("make-directory-internal");
5462 Qmake_directory
= intern_c_string ("make-directory");
5463 Qdelete_directory_internal
= intern_c_string ("delete-directory-internal");
5464 Qdelete_file
= intern_c_string ("delete-file");
5465 Qrename_file
= intern_c_string ("rename-file");
5466 Qadd_name_to_file
= intern_c_string ("add-name-to-file");
5467 Qmake_symbolic_link
= intern_c_string ("make-symbolic-link");
5468 Qfile_exists_p
= intern_c_string ("file-exists-p");
5469 Qfile_executable_p
= intern_c_string ("file-executable-p");
5470 Qfile_readable_p
= intern_c_string ("file-readable-p");
5471 Qfile_writable_p
= intern_c_string ("file-writable-p");
5472 Qfile_symlink_p
= intern_c_string ("file-symlink-p");
5473 Qaccess_file
= intern_c_string ("access-file");
5474 Qfile_directory_p
= intern_c_string ("file-directory-p");
5475 Qfile_regular_p
= intern_c_string ("file-regular-p");
5476 Qfile_accessible_directory_p
= intern_c_string ("file-accessible-directory-p");
5477 Qfile_modes
= intern_c_string ("file-modes");
5478 Qset_file_modes
= intern_c_string ("set-file-modes");
5479 Qset_file_times
= intern_c_string ("set-file-times");
5480 Qfile_selinux_context
= intern_c_string("file-selinux-context");
5481 Qset_file_selinux_context
= intern_c_string("set-file-selinux-context");
5482 Qfile_newer_than_file_p
= intern_c_string ("file-newer-than-file-p");
5483 Qinsert_file_contents
= intern_c_string ("insert-file-contents");
5484 Qwrite_region
= intern_c_string ("write-region");
5485 Qverify_visited_file_modtime
= intern_c_string ("verify-visited-file-modtime");
5486 Qset_visited_file_modtime
= intern_c_string ("set-visited-file-modtime");
5487 Qauto_save_coding
= intern_c_string ("auto-save-coding");
5489 staticpro (&Qoperations
);
5490 staticpro (&Qexpand_file_name
);
5491 staticpro (&Qsubstitute_in_file_name
);
5492 staticpro (&Qdirectory_file_name
);
5493 staticpro (&Qfile_name_directory
);
5494 staticpro (&Qfile_name_nondirectory
);
5495 staticpro (&Qunhandled_file_name_directory
);
5496 staticpro (&Qfile_name_as_directory
);
5497 staticpro (&Qcopy_file
);
5498 staticpro (&Qmake_directory_internal
);
5499 staticpro (&Qmake_directory
);
5500 staticpro (&Qdelete_directory_internal
);
5501 staticpro (&Qdelete_file
);
5502 staticpro (&Qrename_file
);
5503 staticpro (&Qadd_name_to_file
);
5504 staticpro (&Qmake_symbolic_link
);
5505 staticpro (&Qfile_exists_p
);
5506 staticpro (&Qfile_executable_p
);
5507 staticpro (&Qfile_readable_p
);
5508 staticpro (&Qfile_writable_p
);
5509 staticpro (&Qaccess_file
);
5510 staticpro (&Qfile_symlink_p
);
5511 staticpro (&Qfile_directory_p
);
5512 staticpro (&Qfile_regular_p
);
5513 staticpro (&Qfile_accessible_directory_p
);
5514 staticpro (&Qfile_modes
);
5515 staticpro (&Qset_file_modes
);
5516 staticpro (&Qset_file_times
);
5517 staticpro (&Qfile_selinux_context
);
5518 staticpro (&Qset_file_selinux_context
);
5519 staticpro (&Qfile_newer_than_file_p
);
5520 staticpro (&Qinsert_file_contents
);
5521 staticpro (&Qwrite_region
);
5522 staticpro (&Qverify_visited_file_modtime
);
5523 staticpro (&Qset_visited_file_modtime
);
5524 staticpro (&Qauto_save_coding
);
5526 Qfile_name_history
= intern_c_string ("file-name-history");
5527 Fset (Qfile_name_history
, Qnil
);
5528 staticpro (&Qfile_name_history
);
5530 Qfile_error
= intern_c_string ("file-error");
5531 staticpro (&Qfile_error
);
5532 Qfile_already_exists
= intern_c_string ("file-already-exists");
5533 staticpro (&Qfile_already_exists
);
5534 Qfile_date_error
= intern_c_string ("file-date-error");
5535 staticpro (&Qfile_date_error
);
5536 Qexcl
= intern_c_string ("excl");
5539 DEFVAR_LISP ("file-name-coding-system", Vfile_name_coding_system
,
5540 doc
: /* *Coding system for encoding file names.
5541 If it is nil, `default-file-name-coding-system' (which see) is used. */);
5542 Vfile_name_coding_system
= Qnil
;
5544 DEFVAR_LISP ("default-file-name-coding-system",
5545 Vdefault_file_name_coding_system
,
5546 doc
: /* Default coding system for encoding file names.
5547 This variable is used only when `file-name-coding-system' is nil.
5549 This variable is set/changed by the command `set-language-environment'.
5550 User should not set this variable manually,
5551 instead use `file-name-coding-system' to get a constant encoding
5552 of file names regardless of the current language environment. */);
5553 Vdefault_file_name_coding_system
= Qnil
;
5555 Qformat_decode
= intern_c_string ("format-decode");
5556 staticpro (&Qformat_decode
);
5557 Qformat_annotate_function
= intern_c_string ("format-annotate-function");
5558 staticpro (&Qformat_annotate_function
);
5559 Qafter_insert_file_set_coding
= intern_c_string ("after-insert-file-set-coding");
5560 staticpro (&Qafter_insert_file_set_coding
);
5562 Qcar_less_than_car
= intern_c_string ("car-less-than-car");
5563 staticpro (&Qcar_less_than_car
);
5565 Fput (Qfile_error
, Qerror_conditions
,
5566 Fpurecopy (list2 (Qfile_error
, Qerror
)));
5567 Fput (Qfile_error
, Qerror_message
,
5568 make_pure_c_string ("File error"));
5570 Fput (Qfile_already_exists
, Qerror_conditions
,
5571 Fpurecopy (list3 (Qfile_already_exists
, Qfile_error
, Qerror
)));
5572 Fput (Qfile_already_exists
, Qerror_message
,
5573 make_pure_c_string ("File already exists"));
5575 Fput (Qfile_date_error
, Qerror_conditions
,
5576 Fpurecopy (list3 (Qfile_date_error
, Qfile_error
, Qerror
)));
5577 Fput (Qfile_date_error
, Qerror_message
,
5578 make_pure_c_string ("Cannot set file date"));
5580 DEFVAR_LISP ("file-name-handler-alist", Vfile_name_handler_alist
,
5581 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
5582 If a file name matches REGEXP, then all I/O on that file is done by calling
5585 The first argument given to HANDLER is the name of the I/O primitive
5586 to be handled; the remaining arguments are the arguments that were
5587 passed to that primitive. For example, if you do
5588 (file-exists-p FILENAME)
5589 and FILENAME is handled by HANDLER, then HANDLER is called like this:
5590 (funcall HANDLER 'file-exists-p FILENAME)
5591 The function `find-file-name-handler' checks this list for a handler
5592 for its argument. */);
5593 Vfile_name_handler_alist
= Qnil
;
5595 DEFVAR_LISP ("set-auto-coding-function",
5596 Vset_auto_coding_function
,
5597 doc
: /* If non-nil, a function to call to decide a coding system of file.
5598 Two arguments are passed to this function: the file name
5599 and the length of a file contents following the point.
5600 This function should return a coding system to decode the file contents.
5601 It should check the file name against `auto-coding-alist'.
5602 If no coding system is decided, it should check a coding system
5603 specified in the heading lines with the format:
5604 -*- ... coding: CODING-SYSTEM; ... -*-
5605 or local variable spec of the tailing lines with `coding:' tag. */);
5606 Vset_auto_coding_function
= Qnil
;
5608 DEFVAR_LISP ("after-insert-file-functions", Vafter_insert_file_functions
,
5609 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
5610 Each is passed one argument, the number of characters inserted,
5611 with point at the start of the inserted text. Each function
5612 should leave point the same, and return the new character count.
5613 If `insert-file-contents' is intercepted by a handler from
5614 `file-name-handler-alist', that handler is responsible for calling the
5615 functions in `after-insert-file-functions' if appropriate. */);
5616 Vafter_insert_file_functions
= Qnil
;
5618 DEFVAR_LISP ("write-region-annotate-functions", Vwrite_region_annotate_functions
,
5619 doc
: /* A list of functions to be called at the start of `write-region'.
5620 Each is passed two arguments, START and END as for `write-region'.
5621 These are usually two numbers but not always; see the documentation
5622 for `write-region'. The function should return a list of pairs
5623 of the form (POSITION . STRING), consisting of strings to be effectively
5624 inserted at the specified positions of the file being written (1 means to
5625 insert before the first byte written). The POSITIONs must be sorted into
5628 If there are several annotation functions, the lists returned by these
5629 functions are merged destructively. As each annotation function runs,
5630 the variable `write-region-annotations-so-far' contains a list of all
5631 annotations returned by previous annotation functions.
5633 An annotation function can return with a different buffer current.
5634 Doing so removes the annotations returned by previous functions, and
5635 resets START and END to `point-min' and `point-max' of the new buffer.
5637 After `write-region' completes, Emacs calls the function stored in
5638 `write-region-post-annotation-function', once for each buffer that was
5639 current when building the annotations (i.e., at least once), with that
5640 buffer current. */);
5641 Vwrite_region_annotate_functions
= Qnil
;
5642 staticpro (&Qwrite_region_annotate_functions
);
5643 Qwrite_region_annotate_functions
5644 = intern_c_string ("write-region-annotate-functions");
5646 DEFVAR_LISP ("write-region-post-annotation-function",
5647 Vwrite_region_post_annotation_function
,
5648 doc
: /* Function to call after `write-region' completes.
5649 The function is called with no arguments. If one or more of the
5650 annotation functions in `write-region-annotate-functions' changed the
5651 current buffer, the function stored in this variable is called for
5652 each of those additional buffers as well, in addition to the original
5653 buffer. The relevant buffer is current during each function call. */);
5654 Vwrite_region_post_annotation_function
= Qnil
;
5655 staticpro (&Vwrite_region_annotation_buffers
);
5657 DEFVAR_LISP ("write-region-annotations-so-far",
5658 Vwrite_region_annotations_so_far
,
5659 doc
: /* When an annotation function is called, this holds the previous annotations.
5660 These are the annotations made by other annotation functions
5661 that were already called. See also `write-region-annotate-functions'. */);
5662 Vwrite_region_annotations_so_far
= Qnil
;
5664 DEFVAR_LISP ("inhibit-file-name-handlers", Vinhibit_file_name_handlers
,
5665 doc
: /* A list of file name handlers that temporarily should not be used.
5666 This applies only to the operation `inhibit-file-name-operation'. */);
5667 Vinhibit_file_name_handlers
= Qnil
;
5669 DEFVAR_LISP ("inhibit-file-name-operation", Vinhibit_file_name_operation
,
5670 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
5671 Vinhibit_file_name_operation
= Qnil
;
5673 DEFVAR_LISP ("auto-save-list-file-name", Vauto_save_list_file_name
,
5674 doc
: /* File name in which we write a list of all auto save file names.
5675 This variable is initialized automatically from `auto-save-list-file-prefix'
5676 shortly after Emacs reads your `.emacs' file, if you have not yet given it
5677 a non-nil value. */);
5678 Vauto_save_list_file_name
= Qnil
;
5680 DEFVAR_LISP ("auto-save-visited-file-name", Vauto_save_visited_file_name
,
5681 doc
: /* Non-nil says auto-save a buffer in the file it is visiting, when practical.
5682 Normally auto-save files are written under other names. */);
5683 Vauto_save_visited_file_name
= Qnil
;
5685 DEFVAR_LISP ("auto-save-include-big-deletions", Vauto_save_include_big_deletions
,
5686 doc
: /* If non-nil, auto-save even if a large part of the text is deleted.
5687 If nil, deleting a substantial portion of the text disables auto-save
5688 in the buffer; this is the default behavior, because the auto-save
5689 file is usually more useful if it contains the deleted text. */);
5690 Vauto_save_include_big_deletions
= Qnil
;
5693 DEFVAR_BOOL ("write-region-inhibit-fsync", write_region_inhibit_fsync
,
5694 doc
: /* *Non-nil means don't call fsync in `write-region'.
5695 This variable affects calls to `write-region' as well as save commands.
5696 A non-nil value may result in data loss! */);
5697 write_region_inhibit_fsync
= 0;
5700 DEFVAR_BOOL ("delete-by-moving-to-trash", delete_by_moving_to_trash
,
5701 doc
: /* Specifies whether to use the system's trash can.
5702 When non-nil, certain file deletion commands use the function
5703 `move-file-to-trash' instead of deleting files outright.
5704 This includes interactive calls to `delete-file' and
5705 `delete-directory' and the Dired deletion commands. */);
5706 delete_by_moving_to_trash
= 0;
5707 Qdelete_by_moving_to_trash
= intern_c_string ("delete-by-moving-to-trash");
5708 Qmove_file_to_trash
= intern_c_string ("move-file-to-trash");
5709 staticpro (&Qmove_file_to_trash
);
5710 Qcopy_directory
= intern_c_string ("copy-directory");
5711 staticpro (&Qcopy_directory
);
5712 Qdelete_directory
= intern_c_string ("delete-directory");
5713 staticpro (&Qdelete_directory
);
5715 defsubr (&Sfind_file_name_handler
);
5716 defsubr (&Sfile_name_directory
);
5717 defsubr (&Sfile_name_nondirectory
);
5718 defsubr (&Sunhandled_file_name_directory
);
5719 defsubr (&Sfile_name_as_directory
);
5720 defsubr (&Sdirectory_file_name
);
5721 defsubr (&Smake_temp_name
);
5722 defsubr (&Sexpand_file_name
);
5723 defsubr (&Ssubstitute_in_file_name
);
5724 defsubr (&Scopy_file
);
5725 defsubr (&Smake_directory_internal
);
5726 defsubr (&Sdelete_directory_internal
);
5727 defsubr (&Sdelete_file
);
5728 defsubr (&Srename_file
);
5729 defsubr (&Sadd_name_to_file
);
5730 defsubr (&Smake_symbolic_link
);
5731 defsubr (&Sfile_name_absolute_p
);
5732 defsubr (&Sfile_exists_p
);
5733 defsubr (&Sfile_executable_p
);
5734 defsubr (&Sfile_readable_p
);
5735 defsubr (&Sfile_writable_p
);
5736 defsubr (&Saccess_file
);
5737 defsubr (&Sfile_symlink_p
);
5738 defsubr (&Sfile_directory_p
);
5739 defsubr (&Sfile_accessible_directory_p
);
5740 defsubr (&Sfile_regular_p
);
5741 defsubr (&Sfile_modes
);
5742 defsubr (&Sset_file_modes
);
5743 defsubr (&Sset_file_times
);
5744 defsubr (&Sfile_selinux_context
);
5745 defsubr (&Sset_file_selinux_context
);
5746 defsubr (&Sset_default_file_modes
);
5747 defsubr (&Sdefault_file_modes
);
5748 defsubr (&Sfile_newer_than_file_p
);
5749 defsubr (&Sinsert_file_contents
);
5750 defsubr (&Swrite_region
);
5751 defsubr (&Scar_less_than_car
);
5752 defsubr (&Sverify_visited_file_modtime
);
5753 defsubr (&Sclear_visited_file_modtime
);
5754 defsubr (&Svisited_file_modtime
);
5755 defsubr (&Sset_visited_file_modtime
);
5756 defsubr (&Sdo_auto_save
);
5757 defsubr (&Sset_buffer_auto_saved
);
5758 defsubr (&Sclear_buffer_auto_save_failure
);
5759 defsubr (&Srecent_auto_save_p
);
5761 defsubr (&Snext_read_file_uses_dialog_p
);
5764 defsubr (&Sunix_sync
);