| 1 | /* File IO for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, |
| 3 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 4 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include <limits.h> |
| 23 | |
| 24 | #ifdef HAVE_FCNTL_H |
| 25 | #include <fcntl.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #ifdef HAVE_UNISTD_H |
| 33 | #include <unistd.h> |
| 34 | #endif |
| 35 | |
| 36 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
| 37 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) |
| 38 | #endif |
| 39 | |
| 40 | #if !defined (S_ISFIFO) && defined (S_IFIFO) |
| 41 | # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) |
| 42 | #endif |
| 43 | |
| 44 | #if !defined (S_ISREG) && defined (S_IFREG) |
| 45 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) |
| 46 | #endif |
| 47 | |
| 48 | #ifdef HAVE_PWD_H |
| 49 | #include <pwd.h> |
| 50 | #endif |
| 51 | |
| 52 | #include <ctype.h> |
| 53 | #include <errno.h> |
| 54 | |
| 55 | #ifndef vax11c |
| 56 | #ifndef USE_CRT_DLL |
| 57 | extern int errno; |
| 58 | #endif |
| 59 | #endif |
| 60 | |
| 61 | #include "lisp.h" |
| 62 | #include "intervals.h" |
| 63 | #include "buffer.h" |
| 64 | #include "character.h" |
| 65 | #include "coding.h" |
| 66 | #include "window.h" |
| 67 | #include "blockinput.h" |
| 68 | #include "frame.h" |
| 69 | #include "dispextern.h" |
| 70 | |
| 71 | #ifdef WINDOWSNT |
| 72 | #define NOMINMAX 1 |
| 73 | #include <windows.h> |
| 74 | #include <stdlib.h> |
| 75 | #include <fcntl.h> |
| 76 | #endif /* not WINDOWSNT */ |
| 77 | |
| 78 | #ifdef MSDOS |
| 79 | #include "msdos.h" |
| 80 | #include <sys/param.h> |
| 81 | #if __DJGPP__ >= 2 |
| 82 | #include <fcntl.h> |
| 83 | #include <string.h> |
| 84 | #endif |
| 85 | #endif |
| 86 | |
| 87 | #ifdef DOS_NT |
| 88 | #define CORRECT_DIR_SEPS(s) \ |
| 89 | do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ |
| 90 | else unixtodos_filename (s); \ |
| 91 | } while (0) |
| 92 | /* On Windows, drive letters must be alphabetic - on DOS, the Netware |
| 93 | redirector allows the six letters between 'Z' and 'a' as well. */ |
| 94 | #ifdef MSDOS |
| 95 | #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z') |
| 96 | #endif |
| 97 | #ifdef WINDOWSNT |
| 98 | #define IS_DRIVE(x) isalpha (x) |
| 99 | #endif |
| 100 | /* Need to lower-case the drive letter, or else expanded |
| 101 | filenames will sometimes compare inequal, because |
| 102 | `expand-file-name' doesn't always down-case the drive letter. */ |
| 103 | #define DRIVE_LETTER(x) (tolower (x)) |
| 104 | #endif |
| 105 | |
| 106 | #include "systime.h" |
| 107 | |
| 108 | #ifdef HPUX |
| 109 | #include <netio.h> |
| 110 | #endif |
| 111 | |
| 112 | #include "commands.h" |
| 113 | extern int use_dialog_box; |
| 114 | extern int use_file_dialog; |
| 115 | |
| 116 | #ifndef O_WRONLY |
| 117 | #define O_WRONLY 1 |
| 118 | #endif |
| 119 | |
| 120 | #ifndef O_RDONLY |
| 121 | #define O_RDONLY 0 |
| 122 | #endif |
| 123 | |
| 124 | #ifndef S_ISLNK |
| 125 | # define lstat stat |
| 126 | #endif |
| 127 | |
| 128 | #ifndef FILE_SYSTEM_CASE |
| 129 | #define FILE_SYSTEM_CASE(filename) (filename) |
| 130 | #endif |
| 131 | |
| 132 | /* Nonzero during writing of auto-save files */ |
| 133 | int auto_saving; |
| 134 | |
| 135 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
| 136 | a new file with the same mode as the original */ |
| 137 | int auto_save_mode_bits; |
| 138 | |
| 139 | /* Set by auto_save_1 if an error occurred during the last auto-save. */ |
| 140 | int auto_save_error_occurred; |
| 141 | |
| 142 | /* The symbol bound to coding-system-for-read when |
| 143 | insert-file-contents is called for recovering a file. This is not |
| 144 | an actual coding system name, but just an indicator to tell |
| 145 | insert-file-contents to use `emacs-mule' with a special flag for |
| 146 | auto saving and recovering a file. */ |
| 147 | Lisp_Object Qauto_save_coding; |
| 148 | |
| 149 | /* Coding system for file names, or nil if none. */ |
| 150 | Lisp_Object Vfile_name_coding_system; |
| 151 | |
| 152 | /* Coding system for file names used only when |
| 153 | Vfile_name_coding_system is nil. */ |
| 154 | Lisp_Object Vdefault_file_name_coding_system; |
| 155 | |
| 156 | /* Alist of elements (REGEXP . HANDLER) for file names |
| 157 | whose I/O is done with a special handler. */ |
| 158 | Lisp_Object Vfile_name_handler_alist; |
| 159 | |
| 160 | /* Property name of a file name handler, |
| 161 | which gives a list of operations it handles.. */ |
| 162 | Lisp_Object Qoperations; |
| 163 | |
| 164 | /* Lisp functions for translating file formats */ |
| 165 | Lisp_Object Qformat_decode, Qformat_annotate_function; |
| 166 | |
| 167 | /* Function to be called to decide a coding system of a reading file. */ |
| 168 | Lisp_Object Vset_auto_coding_function; |
| 169 | |
| 170 | /* Functions to be called to process text properties in inserted file. */ |
| 171 | Lisp_Object Vafter_insert_file_functions; |
| 172 | |
| 173 | /* Lisp function for setting buffer-file-coding-system and the |
| 174 | multibyteness of the current buffer after inserting a file. */ |
| 175 | Lisp_Object Qafter_insert_file_set_coding; |
| 176 | |
| 177 | /* Functions to be called to create text property annotations for file. */ |
| 178 | Lisp_Object Vwrite_region_annotate_functions; |
| 179 | Lisp_Object Qwrite_region_annotate_functions; |
| 180 | |
| 181 | /* During build_annotations, each time an annotation function is called, |
| 182 | this holds the annotations made by the previous functions. */ |
| 183 | Lisp_Object Vwrite_region_annotations_so_far; |
| 184 | |
| 185 | /* File name in which we write a list of all our auto save files. */ |
| 186 | Lisp_Object Vauto_save_list_file_name; |
| 187 | |
| 188 | /* Whether or not files are auto-saved into themselves. */ |
| 189 | Lisp_Object Vauto_save_visited_file_name; |
| 190 | |
| 191 | /* On NT, specifies the directory separator character, used (eg.) when |
| 192 | expanding file names. This can be bound to / or \. */ |
| 193 | Lisp_Object Vdirectory_sep_char; |
| 194 | |
| 195 | #ifdef HAVE_FSYNC |
| 196 | /* Nonzero means skip the call to fsync in Fwrite-region. */ |
| 197 | int write_region_inhibit_fsync; |
| 198 | #endif |
| 199 | |
| 200 | /* Non-zero means call move-file-to-trash in Fdelete_file or |
| 201 | Fdelete_directory. */ |
| 202 | int delete_by_moving_to_trash; |
| 203 | |
| 204 | Lisp_Object Qdelete_by_moving_to_trash; |
| 205 | |
| 206 | /* Lisp function for moving files to trash. */ |
| 207 | Lisp_Object Qmove_file_to_trash; |
| 208 | |
| 209 | extern Lisp_Object Vuser_login_name; |
| 210 | |
| 211 | #ifdef WINDOWSNT |
| 212 | extern Lisp_Object Vw32_get_true_file_attributes; |
| 213 | #endif |
| 214 | |
| 215 | extern int minibuf_level; |
| 216 | |
| 217 | extern int minibuffer_auto_raise; |
| 218 | |
| 219 | extern int history_delete_duplicates; |
| 220 | |
| 221 | /* These variables describe handlers that have "already" had a chance |
| 222 | to handle the current operation. |
| 223 | |
| 224 | Vinhibit_file_name_handlers is a list of file name handlers. |
| 225 | Vinhibit_file_name_operation is the operation being handled. |
| 226 | If we try to handle that operation, we ignore those handlers. */ |
| 227 | |
| 228 | static Lisp_Object Vinhibit_file_name_handlers; |
| 229 | static Lisp_Object Vinhibit_file_name_operation; |
| 230 | |
| 231 | Lisp_Object Qfile_error, Qfile_already_exists, Qfile_date_error; |
| 232 | Lisp_Object Qexcl; |
| 233 | Lisp_Object Qfile_name_history; |
| 234 | |
| 235 | Lisp_Object Qcar_less_than_car; |
| 236 | |
| 237 | static int a_write P_ ((int, Lisp_Object, int, int, |
| 238 | Lisp_Object *, struct coding_system *)); |
| 239 | static int e_write P_ ((int, Lisp_Object, int, int, struct coding_system *)); |
| 240 | |
| 241 | \f |
| 242 | void |
| 243 | report_file_error (string, data) |
| 244 | const char *string; |
| 245 | Lisp_Object data; |
| 246 | { |
| 247 | Lisp_Object errstring; |
| 248 | int errorno = errno; |
| 249 | char *str; |
| 250 | |
| 251 | synchronize_system_messages_locale (); |
| 252 | str = strerror (errorno); |
| 253 | errstring = code_convert_string_norecord (make_unibyte_string (str, |
| 254 | strlen (str)), |
| 255 | Vlocale_coding_system, 0); |
| 256 | |
| 257 | while (1) |
| 258 | switch (errorno) |
| 259 | { |
| 260 | case EEXIST: |
| 261 | xsignal (Qfile_already_exists, Fcons (errstring, data)); |
| 262 | break; |
| 263 | default: |
| 264 | /* System error messages are capitalized. Downcase the initial |
| 265 | unless it is followed by a slash. (The slash case caters to |
| 266 | error messages that begin with "I/O" or, in German, "E/A".) */ |
| 267 | if (STRING_MULTIBYTE (errstring) |
| 268 | && ! EQ (Faref (errstring, make_number (1)), make_number ('/'))) |
| 269 | { |
| 270 | int c; |
| 271 | |
| 272 | str = (char *) SDATA (errstring); |
| 273 | c = STRING_CHAR (str, 0); |
| 274 | Faset (errstring, make_number (0), make_number (DOWNCASE (c))); |
| 275 | } |
| 276 | |
| 277 | xsignal (Qfile_error, |
| 278 | Fcons (build_string (string), Fcons (errstring, data))); |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | Lisp_Object |
| 283 | close_file_unwind (fd) |
| 284 | Lisp_Object fd; |
| 285 | { |
| 286 | emacs_close (XFASTINT (fd)); |
| 287 | return Qnil; |
| 288 | } |
| 289 | |
| 290 | /* Restore point, having saved it as a marker. */ |
| 291 | |
| 292 | static Lisp_Object |
| 293 | restore_point_unwind (location) |
| 294 | Lisp_Object location; |
| 295 | { |
| 296 | Fgoto_char (location); |
| 297 | Fset_marker (location, Qnil, Qnil); |
| 298 | return Qnil; |
| 299 | } |
| 300 | |
| 301 | \f |
| 302 | Lisp_Object Qexpand_file_name; |
| 303 | Lisp_Object Qsubstitute_in_file_name; |
| 304 | Lisp_Object Qdirectory_file_name; |
| 305 | Lisp_Object Qfile_name_directory; |
| 306 | Lisp_Object Qfile_name_nondirectory; |
| 307 | Lisp_Object Qunhandled_file_name_directory; |
| 308 | Lisp_Object Qfile_name_as_directory; |
| 309 | Lisp_Object Qcopy_file; |
| 310 | Lisp_Object Qmake_directory_internal; |
| 311 | Lisp_Object Qmake_directory; |
| 312 | Lisp_Object Qdelete_directory; |
| 313 | Lisp_Object Qdelete_file; |
| 314 | Lisp_Object Qrename_file; |
| 315 | Lisp_Object Qadd_name_to_file; |
| 316 | Lisp_Object Qmake_symbolic_link; |
| 317 | Lisp_Object Qfile_exists_p; |
| 318 | Lisp_Object Qfile_executable_p; |
| 319 | Lisp_Object Qfile_readable_p; |
| 320 | Lisp_Object Qfile_writable_p; |
| 321 | Lisp_Object Qfile_symlink_p; |
| 322 | Lisp_Object Qaccess_file; |
| 323 | Lisp_Object Qfile_directory_p; |
| 324 | Lisp_Object Qfile_regular_p; |
| 325 | Lisp_Object Qfile_accessible_directory_p; |
| 326 | Lisp_Object Qfile_modes; |
| 327 | Lisp_Object Qset_file_modes; |
| 328 | Lisp_Object Qset_file_times; |
| 329 | Lisp_Object Qfile_newer_than_file_p; |
| 330 | Lisp_Object Qinsert_file_contents; |
| 331 | Lisp_Object Qwrite_region; |
| 332 | Lisp_Object Qverify_visited_file_modtime; |
| 333 | Lisp_Object Qset_visited_file_modtime; |
| 334 | |
| 335 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 2, 2, 0, |
| 336 | doc: /* Return FILENAME's handler function for OPERATION, if it has one. |
| 337 | Otherwise, return nil. |
| 338 | A file name is handled if one of the regular expressions in |
| 339 | `file-name-handler-alist' matches it. |
| 340 | |
| 341 | If OPERATION equals `inhibit-file-name-operation', then we ignore |
| 342 | any handlers that are members of `inhibit-file-name-handlers', |
| 343 | but we still do run any other handlers. This lets handlers |
| 344 | use the standard functions without calling themselves recursively. */) |
| 345 | (filename, operation) |
| 346 | Lisp_Object filename, operation; |
| 347 | { |
| 348 | /* This function must not munge the match data. */ |
| 349 | Lisp_Object chain, inhibited_handlers, result; |
| 350 | int pos = -1; |
| 351 | |
| 352 | result = Qnil; |
| 353 | CHECK_STRING (filename); |
| 354 | |
| 355 | if (EQ (operation, Vinhibit_file_name_operation)) |
| 356 | inhibited_handlers = Vinhibit_file_name_handlers; |
| 357 | else |
| 358 | inhibited_handlers = Qnil; |
| 359 | |
| 360 | for (chain = Vfile_name_handler_alist; CONSP (chain); |
| 361 | chain = XCDR (chain)) |
| 362 | { |
| 363 | Lisp_Object elt; |
| 364 | elt = XCAR (chain); |
| 365 | if (CONSP (elt)) |
| 366 | { |
| 367 | Lisp_Object string = XCAR (elt); |
| 368 | int match_pos; |
| 369 | Lisp_Object handler = XCDR (elt); |
| 370 | Lisp_Object operations = Qnil; |
| 371 | |
| 372 | if (SYMBOLP (handler)) |
| 373 | operations = Fget (handler, Qoperations); |
| 374 | |
| 375 | if (STRINGP (string) |
| 376 | && (match_pos = fast_string_match (string, filename)) > pos |
| 377 | && (NILP (operations) || ! NILP (Fmemq (operation, operations)))) |
| 378 | { |
| 379 | Lisp_Object tem; |
| 380 | |
| 381 | handler = XCDR (elt); |
| 382 | tem = Fmemq (handler, inhibited_handlers); |
| 383 | if (NILP (tem)) |
| 384 | { |
| 385 | result = handler; |
| 386 | pos = match_pos; |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | QUIT; |
| 392 | } |
| 393 | return result; |
| 394 | } |
| 395 | \f |
| 396 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
| 397 | 1, 1, 0, |
| 398 | doc: /* Return the directory component in file name FILENAME. |
| 399 | Return nil if FILENAME does not include a directory. |
| 400 | Otherwise return a directory name. |
| 401 | Given a Unix syntax file name, returns a string ending in slash. */) |
| 402 | (filename) |
| 403 | Lisp_Object filename; |
| 404 | { |
| 405 | #ifndef DOS_NT |
| 406 | register const unsigned char *beg; |
| 407 | #else |
| 408 | register unsigned char *beg; |
| 409 | #endif |
| 410 | register const unsigned char *p; |
| 411 | Lisp_Object handler; |
| 412 | |
| 413 | CHECK_STRING (filename); |
| 414 | |
| 415 | /* If the file name has special constructs in it, |
| 416 | call the corresponding file handler. */ |
| 417 | handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
| 418 | if (!NILP (handler)) |
| 419 | return call2 (handler, Qfile_name_directory, filename); |
| 420 | |
| 421 | filename = FILE_SYSTEM_CASE (filename); |
| 422 | beg = SDATA (filename); |
| 423 | #ifdef DOS_NT |
| 424 | beg = strcpy (alloca (strlen (beg) + 1), beg); |
| 425 | #endif |
| 426 | p = beg + SBYTES (filename); |
| 427 | |
| 428 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
| 429 | #ifdef DOS_NT |
| 430 | /* only recognise drive specifier at the beginning */ |
| 431 | && !(p[-1] == ':' |
| 432 | /* handle the "/:d:foo" and "/:foo" cases correctly */ |
| 433 | && ((p == beg + 2 && !IS_DIRECTORY_SEP (*beg)) |
| 434 | || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) |
| 435 | #endif |
| 436 | ) p--; |
| 437 | |
| 438 | if (p == beg) |
| 439 | return Qnil; |
| 440 | #ifdef DOS_NT |
| 441 | /* Expansion of "c:" to drive and default directory. */ |
| 442 | if (p[-1] == ':') |
| 443 | { |
| 444 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
| 445 | unsigned char *res = alloca (MAXPATHLEN + 1); |
| 446 | unsigned char *r = res; |
| 447 | |
| 448 | if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') |
| 449 | { |
| 450 | strncpy (res, beg, 2); |
| 451 | beg += 2; |
| 452 | r += 2; |
| 453 | } |
| 454 | |
| 455 | if (getdefdir (toupper (*beg) - 'A' + 1, r)) |
| 456 | { |
| 457 | if (!IS_DIRECTORY_SEP (res[strlen (res) - 1])) |
| 458 | strcat (res, "/"); |
| 459 | beg = res; |
| 460 | p = beg + strlen (beg); |
| 461 | } |
| 462 | } |
| 463 | CORRECT_DIR_SEPS (beg); |
| 464 | #endif /* DOS_NT */ |
| 465 | |
| 466 | return make_specified_string (beg, -1, p - beg, STRING_MULTIBYTE (filename)); |
| 467 | } |
| 468 | |
| 469 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, |
| 470 | Sfile_name_nondirectory, 1, 1, 0, |
| 471 | doc: /* Return file name FILENAME sans its directory. |
| 472 | For example, in a Unix-syntax file name, |
| 473 | this is everything after the last slash, |
| 474 | or the entire name if it contains no slash. */) |
| 475 | (filename) |
| 476 | Lisp_Object filename; |
| 477 | { |
| 478 | register const unsigned char *beg, *p, *end; |
| 479 | Lisp_Object handler; |
| 480 | |
| 481 | CHECK_STRING (filename); |
| 482 | |
| 483 | /* If the file name has special constructs in it, |
| 484 | call the corresponding file handler. */ |
| 485 | handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
| 486 | if (!NILP (handler)) |
| 487 | return call2 (handler, Qfile_name_nondirectory, filename); |
| 488 | |
| 489 | beg = SDATA (filename); |
| 490 | end = p = beg + SBYTES (filename); |
| 491 | |
| 492 | while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
| 493 | #ifdef DOS_NT |
| 494 | /* only recognise drive specifier at beginning */ |
| 495 | && !(p[-1] == ':' |
| 496 | /* handle the "/:d:foo" case correctly */ |
| 497 | && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) |
| 498 | #endif |
| 499 | ) |
| 500 | p--; |
| 501 | |
| 502 | return make_specified_string (p, -1, end - p, STRING_MULTIBYTE (filename)); |
| 503 | } |
| 504 | |
| 505 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, |
| 506 | Sunhandled_file_name_directory, 1, 1, 0, |
| 507 | doc: /* Return a directly usable directory name somehow associated with FILENAME. |
| 508 | A `directly usable' directory name is one that may be used without the |
| 509 | intervention of any file handler. |
| 510 | If FILENAME is a directly usable file itself, return |
| 511 | \(file-name-directory FILENAME). |
| 512 | If FILENAME refers to a file which is not accessible from a local process, |
| 513 | then this should return nil. |
| 514 | The `call-process' and `start-process' functions use this function to |
| 515 | get a current directory to run processes in. */) |
| 516 | (filename) |
| 517 | Lisp_Object filename; |
| 518 | { |
| 519 | Lisp_Object handler; |
| 520 | |
| 521 | /* If the file name has special constructs in it, |
| 522 | call the corresponding file handler. */ |
| 523 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
| 524 | if (!NILP (handler)) |
| 525 | return call2 (handler, Qunhandled_file_name_directory, filename); |
| 526 | |
| 527 | return Ffile_name_directory (filename); |
| 528 | } |
| 529 | |
| 530 | \f |
| 531 | char * |
| 532 | file_name_as_directory (out, in) |
| 533 | char *out, *in; |
| 534 | { |
| 535 | int size = strlen (in) - 1; |
| 536 | |
| 537 | strcpy (out, in); |
| 538 | |
| 539 | if (size < 0) |
| 540 | { |
| 541 | out[0] = '.'; |
| 542 | out[1] = '/'; |
| 543 | out[2] = 0; |
| 544 | return out; |
| 545 | } |
| 546 | |
| 547 | /* For Unix syntax, Append a slash if necessary */ |
| 548 | if (!IS_DIRECTORY_SEP (out[size])) |
| 549 | { |
| 550 | /* Cannot use DIRECTORY_SEP, which could have any value */ |
| 551 | out[size + 1] = '/'; |
| 552 | out[size + 2] = '\0'; |
| 553 | } |
| 554 | #ifdef DOS_NT |
| 555 | CORRECT_DIR_SEPS (out); |
| 556 | #endif |
| 557 | return out; |
| 558 | } |
| 559 | |
| 560 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
| 561 | Sfile_name_as_directory, 1, 1, 0, |
| 562 | doc: /* Return a string representing the file name FILE interpreted as a directory. |
| 563 | This operation exists because a directory is also a file, but its name as |
| 564 | a directory is different from its name as a file. |
| 565 | The result can be used as the value of `default-directory' |
| 566 | or passed as second argument to `expand-file-name'. |
| 567 | For a Unix-syntax file name, just appends a slash. */) |
| 568 | (file) |
| 569 | Lisp_Object file; |
| 570 | { |
| 571 | char *buf; |
| 572 | Lisp_Object handler; |
| 573 | |
| 574 | CHECK_STRING (file); |
| 575 | if (NILP (file)) |
| 576 | return Qnil; |
| 577 | |
| 578 | /* If the file name has special constructs in it, |
| 579 | call the corresponding file handler. */ |
| 580 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
| 581 | if (!NILP (handler)) |
| 582 | return call2 (handler, Qfile_name_as_directory, file); |
| 583 | |
| 584 | buf = (char *) alloca (SBYTES (file) + 10); |
| 585 | file_name_as_directory (buf, SDATA (file)); |
| 586 | return make_specified_string (buf, -1, strlen (buf), |
| 587 | STRING_MULTIBYTE (file)); |
| 588 | } |
| 589 | \f |
| 590 | /* |
| 591 | * Convert from directory name to filename. |
| 592 | * On UNIX, it's simple: just make sure there isn't a terminating / |
| 593 | |
| 594 | * Value is nonzero if the string output is different from the input. |
| 595 | */ |
| 596 | |
| 597 | int |
| 598 | directory_file_name (src, dst) |
| 599 | char *src, *dst; |
| 600 | { |
| 601 | long slen; |
| 602 | |
| 603 | slen = strlen (src); |
| 604 | |
| 605 | /* Process as Unix format: just remove any final slash. |
| 606 | But leave "/" unchanged; do not change it to "". */ |
| 607 | strcpy (dst, src); |
| 608 | if (slen > 1 |
| 609 | && IS_DIRECTORY_SEP (dst[slen - 1]) |
| 610 | #ifdef DOS_NT |
| 611 | && !IS_ANY_SEP (dst[slen - 2]) |
| 612 | #endif |
| 613 | ) |
| 614 | dst[slen - 1] = 0; |
| 615 | #ifdef DOS_NT |
| 616 | CORRECT_DIR_SEPS (dst); |
| 617 | #endif |
| 618 | return 1; |
| 619 | } |
| 620 | |
| 621 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
| 622 | 1, 1, 0, |
| 623 | doc: /* Returns the file name of the directory named DIRECTORY. |
| 624 | This is the name of the file that holds the data for the directory DIRECTORY. |
| 625 | This operation exists because a directory is also a file, but its name as |
| 626 | a directory is different from its name as a file. |
| 627 | In Unix-syntax, this function just removes the final slash. */) |
| 628 | (directory) |
| 629 | Lisp_Object directory; |
| 630 | { |
| 631 | char *buf; |
| 632 | Lisp_Object handler; |
| 633 | |
| 634 | CHECK_STRING (directory); |
| 635 | |
| 636 | if (NILP (directory)) |
| 637 | return Qnil; |
| 638 | |
| 639 | /* If the file name has special constructs in it, |
| 640 | call the corresponding file handler. */ |
| 641 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
| 642 | if (!NILP (handler)) |
| 643 | return call2 (handler, Qdirectory_file_name, directory); |
| 644 | |
| 645 | buf = (char *) alloca (SBYTES (directory) + 20); |
| 646 | directory_file_name (SDATA (directory), buf); |
| 647 | return make_specified_string (buf, -1, strlen (buf), |
| 648 | STRING_MULTIBYTE (directory)); |
| 649 | } |
| 650 | |
| 651 | static char make_temp_name_tbl[64] = |
| 652 | { |
| 653 | 'A','B','C','D','E','F','G','H', |
| 654 | 'I','J','K','L','M','N','O','P', |
| 655 | 'Q','R','S','T','U','V','W','X', |
| 656 | 'Y','Z','a','b','c','d','e','f', |
| 657 | 'g','h','i','j','k','l','m','n', |
| 658 | 'o','p','q','r','s','t','u','v', |
| 659 | 'w','x','y','z','0','1','2','3', |
| 660 | '4','5','6','7','8','9','-','_' |
| 661 | }; |
| 662 | |
| 663 | static unsigned make_temp_name_count, make_temp_name_count_initialized_p; |
| 664 | |
| 665 | /* Value is a temporary file name starting with PREFIX, a string. |
| 666 | |
| 667 | The Emacs process number forms part of the result, so there is |
| 668 | no danger of generating a name being used by another process. |
| 669 | In addition, this function makes an attempt to choose a name |
| 670 | which has no existing file. To make this work, PREFIX should be |
| 671 | an absolute file name. |
| 672 | |
| 673 | BASE64_P non-zero means add the pid as 3 characters in base64 |
| 674 | encoding. In this case, 6 characters will be added to PREFIX to |
| 675 | form the file name. Otherwise, if Emacs is running on a system |
| 676 | with long file names, add the pid as a decimal number. |
| 677 | |
| 678 | This function signals an error if no unique file name could be |
| 679 | generated. */ |
| 680 | |
| 681 | Lisp_Object |
| 682 | make_temp_name (prefix, base64_p) |
| 683 | Lisp_Object prefix; |
| 684 | int base64_p; |
| 685 | { |
| 686 | Lisp_Object val; |
| 687 | int len, clen; |
| 688 | int pid; |
| 689 | unsigned char *p, *data; |
| 690 | char pidbuf[20]; |
| 691 | int pidlen; |
| 692 | |
| 693 | CHECK_STRING (prefix); |
| 694 | |
| 695 | /* VAL is created by adding 6 characters to PREFIX. The first |
| 696 | three are the PID of this process, in base 64, and the second |
| 697 | three are incremented if the file already exists. This ensures |
| 698 | 262144 unique file names per PID per PREFIX. */ |
| 699 | |
| 700 | pid = (int) getpid (); |
| 701 | |
| 702 | if (base64_p) |
| 703 | { |
| 704 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 705 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 706 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 707 | pidlen = 3; |
| 708 | } |
| 709 | else |
| 710 | { |
| 711 | #ifdef HAVE_LONG_FILE_NAMES |
| 712 | sprintf (pidbuf, "%d", pid); |
| 713 | pidlen = strlen (pidbuf); |
| 714 | #else |
| 715 | pidbuf[0] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 716 | pidbuf[1] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 717 | pidbuf[2] = make_temp_name_tbl[pid & 63], pid >>= 6; |
| 718 | pidlen = 3; |
| 719 | #endif |
| 720 | } |
| 721 | |
| 722 | len = SBYTES (prefix); clen = SCHARS (prefix); |
| 723 | val = make_uninit_multibyte_string (clen + 3 + pidlen, len + 3 + pidlen); |
| 724 | if (!STRING_MULTIBYTE (prefix)) |
| 725 | STRING_SET_UNIBYTE (val); |
| 726 | data = SDATA (val); |
| 727 | bcopy(SDATA (prefix), data, len); |
| 728 | p = data + len; |
| 729 | |
| 730 | bcopy (pidbuf, p, pidlen); |
| 731 | p += pidlen; |
| 732 | |
| 733 | /* Here we try to minimize useless stat'ing when this function is |
| 734 | invoked many times successively with the same PREFIX. We achieve |
| 735 | this by initializing count to a random value, and incrementing it |
| 736 | afterwards. |
| 737 | |
| 738 | We don't want make-temp-name to be called while dumping, |
| 739 | because then make_temp_name_count_initialized_p would get set |
| 740 | and then make_temp_name_count would not be set when Emacs starts. */ |
| 741 | |
| 742 | if (!make_temp_name_count_initialized_p) |
| 743 | { |
| 744 | make_temp_name_count = (unsigned) time (NULL); |
| 745 | make_temp_name_count_initialized_p = 1; |
| 746 | } |
| 747 | |
| 748 | while (1) |
| 749 | { |
| 750 | struct stat ignored; |
| 751 | unsigned num = make_temp_name_count; |
| 752 | |
| 753 | p[0] = make_temp_name_tbl[num & 63], num >>= 6; |
| 754 | p[1] = make_temp_name_tbl[num & 63], num >>= 6; |
| 755 | p[2] = make_temp_name_tbl[num & 63], num >>= 6; |
| 756 | |
| 757 | /* Poor man's congruential RN generator. Replace with |
| 758 | ++make_temp_name_count for debugging. */ |
| 759 | make_temp_name_count += 25229; |
| 760 | make_temp_name_count %= 225307; |
| 761 | |
| 762 | if (stat (data, &ignored) < 0) |
| 763 | { |
| 764 | /* We want to return only if errno is ENOENT. */ |
| 765 | if (errno == ENOENT) |
| 766 | return val; |
| 767 | else |
| 768 | /* The error here is dubious, but there is little else we |
| 769 | can do. The alternatives are to return nil, which is |
| 770 | as bad as (and in many cases worse than) throwing the |
| 771 | error, or to ignore the error, which will likely result |
| 772 | in looping through 225307 stat's, which is not only |
| 773 | dog-slow, but also useless since it will fallback to |
| 774 | the errow below, anyway. */ |
| 775 | report_file_error ("Cannot create temporary name for prefix", |
| 776 | Fcons (prefix, Qnil)); |
| 777 | /* not reached */ |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | error ("Cannot create temporary name for prefix `%s'", |
| 782 | SDATA (prefix)); |
| 783 | return Qnil; |
| 784 | } |
| 785 | |
| 786 | |
| 787 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, |
| 788 | doc: /* Generate temporary file name (string) starting with PREFIX (a string). |
| 789 | The Emacs process number forms part of the result, |
| 790 | so there is no danger of generating a name being used by another process. |
| 791 | |
| 792 | In addition, this function makes an attempt to choose a name |
| 793 | which has no existing file. To make this work, |
| 794 | PREFIX should be an absolute file name. |
| 795 | |
| 796 | There is a race condition between calling `make-temp-name' and creating the |
| 797 | file which opens all kinds of security holes. For that reason, you should |
| 798 | probably use `make-temp-file' instead, except in three circumstances: |
| 799 | |
| 800 | * If you are creating the file in the user's home directory. |
| 801 | * If you are creating a directory rather than an ordinary file. |
| 802 | * If you are taking special precautions as `make-temp-file' does. */) |
| 803 | (prefix) |
| 804 | Lisp_Object prefix; |
| 805 | { |
| 806 | return make_temp_name (prefix, 0); |
| 807 | } |
| 808 | |
| 809 | |
| 810 | \f |
| 811 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 812 | doc: /* Convert filename NAME to absolute, and canonicalize it. |
| 813 | Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative |
| 814 | \(does not start with slash or tilde); if DEFAULT-DIRECTORY is nil or missing, |
| 815 | the current buffer's value of `default-directory' is used. |
| 816 | File name components that are `.' are removed, and |
| 817 | so are file name components followed by `..', along with the `..' itself; |
| 818 | note that these simplifications are done without checking the resulting |
| 819 | file names in the file system. |
| 820 | An initial `~/' expands to your home directory. |
| 821 | An initial `~USER/' expands to USER's home directory. |
| 822 | See also the function `substitute-in-file-name'. |
| 823 | |
| 824 | For technical reasons, this function can return correct but |
| 825 | non-intuitive results for the root directory; for instance, |
| 826 | \(expand-file-name ".." "/") returns "/..". For this reason, use |
| 827 | (directory-file-name (file-name-directory dirname)) to traverse a |
| 828 | filesystem tree, not (expand-file-name ".." dirname). */) |
| 829 | (name, default_directory) |
| 830 | Lisp_Object name, default_directory; |
| 831 | { |
| 832 | /* These point to SDATA and need to be careful with string-relocation |
| 833 | during GC (via DECODE_FILE). */ |
| 834 | unsigned char *nm, *newdir; |
| 835 | /* This should only point to alloca'd data. */ |
| 836 | unsigned char *target; |
| 837 | |
| 838 | int tlen; |
| 839 | struct passwd *pw; |
| 840 | #ifdef DOS_NT |
| 841 | int drive = 0; |
| 842 | int collapse_newdir = 1; |
| 843 | int is_escaped = 0; |
| 844 | #endif /* DOS_NT */ |
| 845 | int length; |
| 846 | Lisp_Object handler, result; |
| 847 | int multibyte; |
| 848 | Lisp_Object hdir; |
| 849 | |
| 850 | CHECK_STRING (name); |
| 851 | |
| 852 | /* If the file name has special constructs in it, |
| 853 | call the corresponding file handler. */ |
| 854 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
| 855 | if (!NILP (handler)) |
| 856 | return call3 (handler, Qexpand_file_name, name, default_directory); |
| 857 | |
| 858 | /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ |
| 859 | if (NILP (default_directory)) |
| 860 | default_directory = current_buffer->directory; |
| 861 | if (! STRINGP (default_directory)) |
| 862 | { |
| 863 | #ifdef DOS_NT |
| 864 | /* "/" is not considered a root directory on DOS_NT, so using "/" |
| 865 | here causes an infinite recursion in, e.g., the following: |
| 866 | |
| 867 | (let (default-directory) |
| 868 | (expand-file-name "a")) |
| 869 | |
| 870 | To avoid this, we set default_directory to the root of the |
| 871 | current drive. */ |
| 872 | extern char *emacs_root_dir (void); |
| 873 | |
| 874 | default_directory = build_string (emacs_root_dir ()); |
| 875 | #else |
| 876 | default_directory = build_string ("/"); |
| 877 | #endif |
| 878 | } |
| 879 | |
| 880 | if (!NILP (default_directory)) |
| 881 | { |
| 882 | handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); |
| 883 | if (!NILP (handler)) |
| 884 | return call3 (handler, Qexpand_file_name, name, default_directory); |
| 885 | } |
| 886 | |
| 887 | { |
| 888 | unsigned char *o = SDATA (default_directory); |
| 889 | |
| 890 | /* Make sure DEFAULT_DIRECTORY is properly expanded. |
| 891 | It would be better to do this down below where we actually use |
| 892 | default_directory. Unfortunately, calling Fexpand_file_name recursively |
| 893 | could invoke GC, and the strings might be relocated. This would |
| 894 | be annoying because we have pointers into strings lying around |
| 895 | that would need adjusting, and people would add new pointers to |
| 896 | the code and forget to adjust them, resulting in intermittent bugs. |
| 897 | Putting this call here avoids all that crud. |
| 898 | |
| 899 | The EQ test avoids infinite recursion. */ |
| 900 | if (! NILP (default_directory) && !EQ (default_directory, name) |
| 901 | /* Save time in some common cases - as long as default_directory |
| 902 | is not relative, it can be canonicalized with name below (if it |
| 903 | is needed at all) without requiring it to be expanded now. */ |
| 904 | #ifdef DOS_NT |
| 905 | /* Detect MSDOS file names with drive specifiers. */ |
| 906 | && ! (IS_DRIVE (o[0]) && IS_DEVICE_SEP (o[1]) |
| 907 | && IS_DIRECTORY_SEP (o[2])) |
| 908 | #ifdef WINDOWSNT |
| 909 | /* Detect Windows file names in UNC format. */ |
| 910 | && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) |
| 911 | #endif |
| 912 | #else /* not DOS_NT */ |
| 913 | /* Detect Unix absolute file names (/... alone is not absolute on |
| 914 | DOS or Windows). */ |
| 915 | && ! (IS_DIRECTORY_SEP (o[0])) |
| 916 | #endif /* not DOS_NT */ |
| 917 | ) |
| 918 | { |
| 919 | struct gcpro gcpro1; |
| 920 | |
| 921 | GCPRO1 (name); |
| 922 | default_directory = Fexpand_file_name (default_directory, Qnil); |
| 923 | UNGCPRO; |
| 924 | } |
| 925 | } |
| 926 | name = FILE_SYSTEM_CASE (name); |
| 927 | multibyte = STRING_MULTIBYTE (name); |
| 928 | if (multibyte != STRING_MULTIBYTE (default_directory)) |
| 929 | { |
| 930 | if (multibyte) |
| 931 | default_directory = string_to_multibyte (default_directory); |
| 932 | else |
| 933 | { |
| 934 | name = string_to_multibyte (name); |
| 935 | multibyte = 1; |
| 936 | } |
| 937 | } |
| 938 | |
| 939 | nm = SDATA (name); |
| 940 | |
| 941 | /* Make a local copy of nm[] to protect it from GC in DECODE_FILE below. */ |
| 942 | nm = strcpy (alloca (strlen (nm) + 1), nm); |
| 943 | |
| 944 | #ifdef DOS_NT |
| 945 | /* Note if special escape prefix is present, but remove for now. */ |
| 946 | if (nm[0] == '/' && nm[1] == ':') |
| 947 | { |
| 948 | is_escaped = 1; |
| 949 | nm += 2; |
| 950 | } |
| 951 | |
| 952 | /* Find and remove drive specifier if present; this makes nm absolute |
| 953 | even if the rest of the name appears to be relative. Only look for |
| 954 | drive specifier at the beginning. */ |
| 955 | if (IS_DRIVE (nm[0]) && IS_DEVICE_SEP (nm[1])) |
| 956 | { |
| 957 | drive = nm[0]; |
| 958 | nm += 2; |
| 959 | } |
| 960 | |
| 961 | #ifdef WINDOWSNT |
| 962 | /* If we see "c://somedir", we want to strip the first slash after the |
| 963 | colon when stripping the drive letter. Otherwise, this expands to |
| 964 | "//somedir". */ |
| 965 | if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 966 | nm++; |
| 967 | |
| 968 | /* Discard any previous drive specifier if nm is now in UNC format. */ |
| 969 | if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 970 | { |
| 971 | drive = 0; |
| 972 | } |
| 973 | #endif /* WINDOWSNT */ |
| 974 | #endif /* DOS_NT */ |
| 975 | |
| 976 | /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if |
| 977 | none are found, we can probably return right away. We will avoid |
| 978 | allocating a new string if name is already fully expanded. */ |
| 979 | if ( |
| 980 | IS_DIRECTORY_SEP (nm[0]) |
| 981 | #ifdef MSDOS |
| 982 | && drive && !is_escaped |
| 983 | #endif |
| 984 | #ifdef WINDOWSNT |
| 985 | && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
| 986 | #endif |
| 987 | ) |
| 988 | { |
| 989 | /* If it turns out that the filename we want to return is just a |
| 990 | suffix of FILENAME, we don't need to go through and edit |
| 991 | things; we just need to construct a new string using data |
| 992 | starting at the middle of FILENAME. If we set lose to a |
| 993 | non-zero value, that means we've discovered that we can't do |
| 994 | that cool trick. */ |
| 995 | int lose = 0; |
| 996 | unsigned char *p = nm; |
| 997 | |
| 998 | while (*p) |
| 999 | { |
| 1000 | /* Since we know the name is absolute, we can assume that each |
| 1001 | element starts with a "/". */ |
| 1002 | |
| 1003 | /* "." and ".." are hairy. */ |
| 1004 | if (IS_DIRECTORY_SEP (p[0]) |
| 1005 | && p[1] == '.' |
| 1006 | && (IS_DIRECTORY_SEP (p[2]) |
| 1007 | || p[2] == 0 |
| 1008 | || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) |
| 1009 | || p[3] == 0)))) |
| 1010 | lose = 1; |
| 1011 | /* We want to replace multiple `/' in a row with a single |
| 1012 | slash. */ |
| 1013 | else if (p > nm |
| 1014 | && IS_DIRECTORY_SEP (p[0]) |
| 1015 | && IS_DIRECTORY_SEP (p[1])) |
| 1016 | lose = 1; |
| 1017 | p++; |
| 1018 | } |
| 1019 | if (!lose) |
| 1020 | { |
| 1021 | #ifdef DOS_NT |
| 1022 | /* Make sure directories are all separated with / or \ as |
| 1023 | desired, but avoid allocation of a new string when not |
| 1024 | required. */ |
| 1025 | CORRECT_DIR_SEPS (nm); |
| 1026 | #ifdef WINDOWSNT |
| 1027 | if (IS_DIRECTORY_SEP (nm[1])) |
| 1028 | { |
| 1029 | if (strcmp (nm, SDATA (name)) != 0) |
| 1030 | name = make_specified_string (nm, -1, strlen (nm), multibyte); |
| 1031 | } |
| 1032 | else |
| 1033 | #endif |
| 1034 | /* drive must be set, so this is okay */ |
| 1035 | if (strcmp (nm - 2, SDATA (name)) != 0) |
| 1036 | { |
| 1037 | char temp[] = " :"; |
| 1038 | |
| 1039 | name = make_specified_string (nm, -1, p - nm, multibyte); |
| 1040 | temp[0] = DRIVE_LETTER (drive); |
| 1041 | name = concat2 (build_string (temp), name); |
| 1042 | } |
| 1043 | return name; |
| 1044 | #else /* not DOS_NT */ |
| 1045 | if (strcmp (nm, SDATA (name)) == 0) |
| 1046 | return name; |
| 1047 | return make_specified_string (nm, -1, strlen (nm), multibyte); |
| 1048 | #endif /* not DOS_NT */ |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | /* At this point, nm might or might not be an absolute file name. We |
| 1053 | need to expand ~ or ~user if present, otherwise prefix nm with |
| 1054 | default_directory if nm is not absolute, and finally collapse /./ |
| 1055 | and /foo/../ sequences. |
| 1056 | |
| 1057 | We set newdir to be the appropriate prefix if one is needed: |
| 1058 | - the relevant user directory if nm starts with ~ or ~user |
| 1059 | - the specified drive's working dir (DOS/NT only) if nm does not |
| 1060 | start with / |
| 1061 | - the value of default_directory. |
| 1062 | |
| 1063 | Note that these prefixes are not guaranteed to be absolute (except |
| 1064 | for the working dir of a drive). Therefore, to ensure we always |
| 1065 | return an absolute name, if the final prefix is not absolute we |
| 1066 | append it to the current working directory. */ |
| 1067 | |
| 1068 | newdir = 0; |
| 1069 | |
| 1070 | if (nm[0] == '~') /* prefix ~ */ |
| 1071 | { |
| 1072 | if (IS_DIRECTORY_SEP (nm[1]) |
| 1073 | || nm[1] == 0) /* ~ by itself */ |
| 1074 | { |
| 1075 | Lisp_Object tem; |
| 1076 | |
| 1077 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 1078 | newdir = (unsigned char *) ""; |
| 1079 | nm++; |
| 1080 | /* egetenv may return a unibyte string, which will bite us since |
| 1081 | we expect the directory to be multibyte. */ |
| 1082 | tem = build_string (newdir); |
| 1083 | if (!STRING_MULTIBYTE (tem)) |
| 1084 | { |
| 1085 | hdir = DECODE_FILE (tem); |
| 1086 | newdir = SDATA (hdir); |
| 1087 | } |
| 1088 | #ifdef DOS_NT |
| 1089 | collapse_newdir = 0; |
| 1090 | #endif |
| 1091 | } |
| 1092 | else /* ~user/filename */ |
| 1093 | { |
| 1094 | unsigned char *o, *p; |
| 1095 | for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++); |
| 1096 | o = alloca (p - nm + 1); |
| 1097 | bcopy ((char *) nm, o, p - nm); |
| 1098 | o [p - nm] = 0; |
| 1099 | |
| 1100 | BLOCK_INPUT; |
| 1101 | pw = (struct passwd *) getpwnam (o + 1); |
| 1102 | UNBLOCK_INPUT; |
| 1103 | if (pw) |
| 1104 | { |
| 1105 | newdir = (unsigned char *) pw -> pw_dir; |
| 1106 | nm = p; |
| 1107 | #ifdef DOS_NT |
| 1108 | collapse_newdir = 0; |
| 1109 | #endif |
| 1110 | } |
| 1111 | |
| 1112 | /* If we don't find a user of that name, leave the name |
| 1113 | unchanged; don't move nm forward to p. */ |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | #ifdef DOS_NT |
| 1118 | /* On DOS and Windows, nm is absolute if a drive name was specified; |
| 1119 | use the drive's current directory as the prefix if needed. */ |
| 1120 | if (!newdir && drive) |
| 1121 | { |
| 1122 | /* Get default directory if needed to make nm absolute. */ |
| 1123 | if (!IS_DIRECTORY_SEP (nm[0])) |
| 1124 | { |
| 1125 | newdir = alloca (MAXPATHLEN + 1); |
| 1126 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) |
| 1127 | newdir = NULL; |
| 1128 | } |
| 1129 | if (!newdir) |
| 1130 | { |
| 1131 | /* Either nm starts with /, or drive isn't mounted. */ |
| 1132 | newdir = alloca (4); |
| 1133 | newdir[0] = DRIVE_LETTER (drive); |
| 1134 | newdir[1] = ':'; |
| 1135 | newdir[2] = '/'; |
| 1136 | newdir[3] = 0; |
| 1137 | } |
| 1138 | } |
| 1139 | #endif /* DOS_NT */ |
| 1140 | |
| 1141 | /* Finally, if no prefix has been specified and nm is not absolute, |
| 1142 | then it must be expanded relative to default_directory. */ |
| 1143 | |
| 1144 | if (1 |
| 1145 | #ifndef DOS_NT |
| 1146 | /* /... alone is not absolute on DOS and Windows. */ |
| 1147 | && !IS_DIRECTORY_SEP (nm[0]) |
| 1148 | #endif |
| 1149 | #ifdef WINDOWSNT |
| 1150 | && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 1151 | #endif |
| 1152 | && !newdir) |
| 1153 | { |
| 1154 | newdir = SDATA (default_directory); |
| 1155 | #ifdef DOS_NT |
| 1156 | /* Note if special escape prefix is present, but remove for now. */ |
| 1157 | if (newdir[0] == '/' && newdir[1] == ':') |
| 1158 | { |
| 1159 | is_escaped = 1; |
| 1160 | newdir += 2; |
| 1161 | } |
| 1162 | #endif |
| 1163 | } |
| 1164 | |
| 1165 | #ifdef DOS_NT |
| 1166 | if (newdir) |
| 1167 | { |
| 1168 | /* First ensure newdir is an absolute name. */ |
| 1169 | if ( |
| 1170 | /* Detect MSDOS file names with drive specifiers. */ |
| 1171 | ! (IS_DRIVE (newdir[0]) |
| 1172 | && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) |
| 1173 | #ifdef WINDOWSNT |
| 1174 | /* Detect Windows file names in UNC format. */ |
| 1175 | && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) |
| 1176 | #endif |
| 1177 | ) |
| 1178 | { |
| 1179 | /* Effectively, let newdir be (expand-file-name newdir cwd). |
| 1180 | Because of the admonition against calling expand-file-name |
| 1181 | when we have pointers into lisp strings, we accomplish this |
| 1182 | indirectly by prepending newdir to nm if necessary, and using |
| 1183 | cwd (or the wd of newdir's drive) as the new newdir. */ |
| 1184 | |
| 1185 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
| 1186 | { |
| 1187 | drive = newdir[0]; |
| 1188 | newdir += 2; |
| 1189 | } |
| 1190 | if (!IS_DIRECTORY_SEP (nm[0])) |
| 1191 | { |
| 1192 | char * tmp = alloca (strlen (newdir) + strlen (nm) + 2); |
| 1193 | file_name_as_directory (tmp, newdir); |
| 1194 | strcat (tmp, nm); |
| 1195 | nm = tmp; |
| 1196 | } |
| 1197 | newdir = alloca (MAXPATHLEN + 1); |
| 1198 | if (drive) |
| 1199 | { |
| 1200 | if (!getdefdir (toupper (drive) - 'A' + 1, newdir)) |
| 1201 | newdir = "/"; |
| 1202 | } |
| 1203 | else |
| 1204 | getwd (newdir); |
| 1205 | } |
| 1206 | |
| 1207 | /* Strip off drive name from prefix, if present. */ |
| 1208 | if (IS_DRIVE (newdir[0]) && IS_DEVICE_SEP (newdir[1])) |
| 1209 | { |
| 1210 | drive = newdir[0]; |
| 1211 | newdir += 2; |
| 1212 | } |
| 1213 | |
| 1214 | /* Keep only a prefix from newdir if nm starts with slash |
| 1215 | (//server/share for UNC, nothing otherwise). */ |
| 1216 | if (IS_DIRECTORY_SEP (nm[0]) && collapse_newdir) |
| 1217 | { |
| 1218 | #ifdef WINDOWSNT |
| 1219 | if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) |
| 1220 | { |
| 1221 | unsigned char *p; |
| 1222 | newdir = strcpy (alloca (strlen (newdir) + 1), newdir); |
| 1223 | p = newdir + 2; |
| 1224 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
| 1225 | p++; |
| 1226 | while (*p && !IS_DIRECTORY_SEP (*p)) p++; |
| 1227 | *p = 0; |
| 1228 | } |
| 1229 | else |
| 1230 | #endif |
| 1231 | newdir = ""; |
| 1232 | } |
| 1233 | } |
| 1234 | #endif /* DOS_NT */ |
| 1235 | |
| 1236 | if (newdir) |
| 1237 | { |
| 1238 | /* Get rid of any slash at the end of newdir, unless newdir is |
| 1239 | just / or // (an incomplete UNC name). */ |
| 1240 | length = strlen (newdir); |
| 1241 | if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
| 1242 | #ifdef WINDOWSNT |
| 1243 | && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) |
| 1244 | #endif |
| 1245 | ) |
| 1246 | { |
| 1247 | unsigned char *temp = (unsigned char *) alloca (length); |
| 1248 | bcopy (newdir, temp, length - 1); |
| 1249 | temp[length - 1] = 0; |
| 1250 | newdir = temp; |
| 1251 | } |
| 1252 | tlen = length + 1; |
| 1253 | } |
| 1254 | else |
| 1255 | tlen = 0; |
| 1256 | |
| 1257 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1258 | tlen += strlen (nm) + 1; |
| 1259 | #ifdef DOS_NT |
| 1260 | /* Reserve space for drive specifier and escape prefix, since either |
| 1261 | or both may need to be inserted. (The Microsoft x86 compiler |
| 1262 | produces incorrect code if the following two lines are combined.) */ |
| 1263 | target = (unsigned char *) alloca (tlen + 4); |
| 1264 | target += 4; |
| 1265 | #else /* not DOS_NT */ |
| 1266 | target = (unsigned char *) alloca (tlen); |
| 1267 | #endif /* not DOS_NT */ |
| 1268 | *target = 0; |
| 1269 | |
| 1270 | if (newdir) |
| 1271 | { |
| 1272 | if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) |
| 1273 | { |
| 1274 | #ifdef DOS_NT |
| 1275 | /* If newdir is effectively "C:/", then the drive letter will have |
| 1276 | been stripped and newdir will be "/". Concatenating with an |
| 1277 | absolute directory in nm produces "//", which will then be |
| 1278 | incorrectly treated as a network share. Ignore newdir in |
| 1279 | this case (keeping the drive letter). */ |
| 1280 | if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) |
| 1281 | && newdir[1] == '\0')) |
| 1282 | #endif |
| 1283 | strcpy (target, newdir); |
| 1284 | } |
| 1285 | else |
| 1286 | file_name_as_directory (target, newdir); |
| 1287 | } |
| 1288 | |
| 1289 | strcat (target, nm); |
| 1290 | |
| 1291 | /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
| 1292 | appear. */ |
| 1293 | { |
| 1294 | unsigned char *p = target; |
| 1295 | unsigned char *o = target; |
| 1296 | |
| 1297 | while (*p) |
| 1298 | { |
| 1299 | if (!IS_DIRECTORY_SEP (*p)) |
| 1300 | { |
| 1301 | *o++ = *p++; |
| 1302 | } |
| 1303 | else if (p[1] == '.' |
| 1304 | && (IS_DIRECTORY_SEP (p[2]) |
| 1305 | || p[2] == 0)) |
| 1306 | { |
| 1307 | /* If "/." is the entire filename, keep the "/". Otherwise, |
| 1308 | just delete the whole "/.". */ |
| 1309 | if (o == target && p[2] == '\0') |
| 1310 | *o++ = *p; |
| 1311 | p += 2; |
| 1312 | } |
| 1313 | else if (p[1] == '.' && p[2] == '.' |
| 1314 | /* `/../' is the "superroot" on certain file systems. |
| 1315 | Turned off on DOS_NT systems because they have no |
| 1316 | "superroot" and because this causes us to produce |
| 1317 | file names like "d:/../foo" which fail file-related |
| 1318 | functions of the underlying OS. (To reproduce, try a |
| 1319 | long series of "../../" in default_directory, longer |
| 1320 | than the number of levels from the root.) */ |
| 1321 | #ifndef DOS_NT |
| 1322 | && o != target |
| 1323 | #endif |
| 1324 | && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) |
| 1325 | { |
| 1326 | while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) |
| 1327 | ; |
| 1328 | /* Keep initial / only if this is the whole name. */ |
| 1329 | if (o == target && IS_ANY_SEP (*o) && p[3] == 0) |
| 1330 | ++o; |
| 1331 | p += 3; |
| 1332 | } |
| 1333 | else if (p > target && IS_DIRECTORY_SEP (p[1])) |
| 1334 | /* Collapse multiple `/' in a row. */ |
| 1335 | p++; |
| 1336 | else |
| 1337 | { |
| 1338 | *o++ = *p++; |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | #ifdef DOS_NT |
| 1343 | /* At last, set drive name. */ |
| 1344 | #ifdef WINDOWSNT |
| 1345 | /* Except for network file name. */ |
| 1346 | if (!(IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))) |
| 1347 | #endif /* WINDOWSNT */ |
| 1348 | { |
| 1349 | if (!drive) abort (); |
| 1350 | target -= 2; |
| 1351 | target[0] = DRIVE_LETTER (drive); |
| 1352 | target[1] = ':'; |
| 1353 | } |
| 1354 | /* Reinsert the escape prefix if required. */ |
| 1355 | if (is_escaped) |
| 1356 | { |
| 1357 | target -= 2; |
| 1358 | target[0] = '/'; |
| 1359 | target[1] = ':'; |
| 1360 | } |
| 1361 | CORRECT_DIR_SEPS (target); |
| 1362 | #endif /* DOS_NT */ |
| 1363 | |
| 1364 | result = make_specified_string (target, -1, o - target, multibyte); |
| 1365 | } |
| 1366 | |
| 1367 | /* Again look to see if the file name has special constructs in it |
| 1368 | and perhaps call the corresponding file handler. This is needed |
| 1369 | for filenames such as "/foo/../user@host:/bar/../baz". Expanding |
| 1370 | the ".." component gives us "/user@host:/bar/../baz" which needs |
| 1371 | to be expanded again. */ |
| 1372 | handler = Ffind_file_name_handler (result, Qexpand_file_name); |
| 1373 | if (!NILP (handler)) |
| 1374 | return call3 (handler, Qexpand_file_name, result, default_directory); |
| 1375 | |
| 1376 | return result; |
| 1377 | } |
| 1378 | |
| 1379 | #if 0 |
| 1380 | /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION! |
| 1381 | This is the old version of expand-file-name, before it was thoroughly |
| 1382 | rewritten for Emacs 10.31. We leave this version here commented-out, |
| 1383 | because the code is very complex and likely to have subtle bugs. If |
| 1384 | bugs _are_ found, it might be of interest to look at the old code and |
| 1385 | see what did it do in the relevant situation. |
| 1386 | |
| 1387 | Don't remove this code: it's true that it will be accessible via CVS, |
| 1388 | but a few years from deletion, people will forget it is there. */ |
| 1389 | |
| 1390 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */ |
| 1391 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 1392 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 1393 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 1394 | \(does not start with slash); if DEFAULT is nil or missing,\n\ |
| 1395 | the current buffer's value of default-directory is used.\n\ |
| 1396 | Filenames containing `.' or `..' as components are simplified;\n\ |
| 1397 | initial `~/' expands to your home directory.\n\ |
| 1398 | See also the function `substitute-in-file-name'.") |
| 1399 | (name, defalt) |
| 1400 | Lisp_Object name, defalt; |
| 1401 | { |
| 1402 | unsigned char *nm; |
| 1403 | |
| 1404 | register unsigned char *newdir, *p, *o; |
| 1405 | int tlen; |
| 1406 | unsigned char *target; |
| 1407 | struct passwd *pw; |
| 1408 | int lose; |
| 1409 | |
| 1410 | CHECK_STRING (name); |
| 1411 | nm = SDATA (name); |
| 1412 | |
| 1413 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 1414 | If no /./ or /../ we can return right away. */ |
| 1415 | if (nm[0] == '/') |
| 1416 | { |
| 1417 | p = nm; |
| 1418 | lose = 0; |
| 1419 | while (*p) |
| 1420 | { |
| 1421 | if (p[0] == '/' && p[1] == '/' |
| 1422 | ) |
| 1423 | nm = p + 1; |
| 1424 | if (p[0] == '/' && p[1] == '~') |
| 1425 | nm = p + 1, lose = 1; |
| 1426 | if (p[0] == '/' && p[1] == '.' |
| 1427 | && (p[2] == '/' || p[2] == 0 |
| 1428 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) |
| 1429 | lose = 1; |
| 1430 | p++; |
| 1431 | } |
| 1432 | if (!lose) |
| 1433 | { |
| 1434 | if (nm == SDATA (name)) |
| 1435 | return name; |
| 1436 | return build_string (nm); |
| 1437 | } |
| 1438 | } |
| 1439 | |
| 1440 | /* Now determine directory to start with and put it in NEWDIR */ |
| 1441 | |
| 1442 | newdir = 0; |
| 1443 | |
| 1444 | if (nm[0] == '~') /* prefix ~ */ |
| 1445 | if (nm[1] == '/' || nm[1] == 0)/* ~/filename */ |
| 1446 | { |
| 1447 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 1448 | newdir = (unsigned char *) ""; |
| 1449 | nm++; |
| 1450 | } |
| 1451 | else /* ~user/filename */ |
| 1452 | { |
| 1453 | /* Get past ~ to user */ |
| 1454 | unsigned char *user = nm + 1; |
| 1455 | /* Find end of name. */ |
| 1456 | unsigned char *ptr = (unsigned char *) index (user, '/'); |
| 1457 | int len = ptr ? ptr - user : strlen (user); |
| 1458 | /* Copy the user name into temp storage. */ |
| 1459 | o = (unsigned char *) alloca (len + 1); |
| 1460 | bcopy ((char *) user, o, len); |
| 1461 | o[len] = 0; |
| 1462 | |
| 1463 | /* Look up the user name. */ |
| 1464 | BLOCK_INPUT; |
| 1465 | pw = (struct passwd *) getpwnam (o + 1); |
| 1466 | UNBLOCK_INPUT; |
| 1467 | if (!pw) |
| 1468 | error ("\"%s\" isn't a registered user", o + 1); |
| 1469 | |
| 1470 | newdir = (unsigned char *) pw->pw_dir; |
| 1471 | |
| 1472 | /* Discard the user name from NM. */ |
| 1473 | nm += len; |
| 1474 | } |
| 1475 | |
| 1476 | if (nm[0] != '/' && !newdir) |
| 1477 | { |
| 1478 | if (NILP (defalt)) |
| 1479 | defalt = current_buffer->directory; |
| 1480 | CHECK_STRING (defalt); |
| 1481 | newdir = SDATA (defalt); |
| 1482 | } |
| 1483 | |
| 1484 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1485 | |
| 1486 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; |
| 1487 | target = (unsigned char *) alloca (tlen); |
| 1488 | *target = 0; |
| 1489 | |
| 1490 | if (newdir) |
| 1491 | { |
| 1492 | if (nm[0] == 0 || nm[0] == '/') |
| 1493 | strcpy (target, newdir); |
| 1494 | else |
| 1495 | file_name_as_directory (target, newdir); |
| 1496 | } |
| 1497 | |
| 1498 | strcat (target, nm); |
| 1499 | |
| 1500 | /* Now canonicalize by removing /. and /foo/.. if they appear */ |
| 1501 | |
| 1502 | p = target; |
| 1503 | o = target; |
| 1504 | |
| 1505 | while (*p) |
| 1506 | { |
| 1507 | if (*p != '/') |
| 1508 | { |
| 1509 | *o++ = *p++; |
| 1510 | } |
| 1511 | else if (!strncmp (p, "//", 2) |
| 1512 | ) |
| 1513 | { |
| 1514 | o = target; |
| 1515 | p++; |
| 1516 | } |
| 1517 | else if (p[0] == '/' && p[1] == '.' |
| 1518 | && (p[2] == '/' || p[2] == 0)) |
| 1519 | p += 2; |
| 1520 | else if (!strncmp (p, "/..", 3) |
| 1521 | /* `/../' is the "superroot" on certain file systems. */ |
| 1522 | && o != target |
| 1523 | && (p[3] == '/' || p[3] == 0)) |
| 1524 | { |
| 1525 | while (o != target && *--o != '/') |
| 1526 | ; |
| 1527 | if (o == target && *o == '/') |
| 1528 | ++o; |
| 1529 | p += 3; |
| 1530 | } |
| 1531 | else |
| 1532 | { |
| 1533 | *o++ = *p++; |
| 1534 | } |
| 1535 | } |
| 1536 | |
| 1537 | return make_string (target, o - target); |
| 1538 | } |
| 1539 | #endif |
| 1540 | \f |
| 1541 | /* If /~ or // appears, discard everything through first slash. */ |
| 1542 | static int |
| 1543 | file_name_absolute_p (filename) |
| 1544 | const unsigned char *filename; |
| 1545 | { |
| 1546 | return |
| 1547 | (IS_DIRECTORY_SEP (*filename) || *filename == '~' |
| 1548 | #ifdef DOS_NT |
| 1549 | || (IS_DRIVE (*filename) && IS_DEVICE_SEP (filename[1]) |
| 1550 | && IS_DIRECTORY_SEP (filename[2])) |
| 1551 | #endif |
| 1552 | ); |
| 1553 | } |
| 1554 | |
| 1555 | static unsigned char * |
| 1556 | search_embedded_absfilename (nm, endp) |
| 1557 | unsigned char *nm, *endp; |
| 1558 | { |
| 1559 | unsigned char *p, *s; |
| 1560 | |
| 1561 | for (p = nm + 1; p < endp; p++) |
| 1562 | { |
| 1563 | if ((0 |
| 1564 | || IS_DIRECTORY_SEP (p[-1])) |
| 1565 | && file_name_absolute_p (p) |
| 1566 | #if defined (WINDOWSNT) || defined(CYGWIN) |
| 1567 | /* // at start of file name is meaningful in Apollo, |
| 1568 | WindowsNT and Cygwin systems. */ |
| 1569 | && !(IS_DIRECTORY_SEP (p[0]) && p - 1 == nm) |
| 1570 | #endif /* not (WINDOWSNT || CYGWIN) */ |
| 1571 | ) |
| 1572 | { |
| 1573 | for (s = p; *s && (!IS_DIRECTORY_SEP (*s)); s++); |
| 1574 | if (p[0] == '~' && s > p + 1) /* we've got "/~something/" */ |
| 1575 | { |
| 1576 | unsigned char *o = alloca (s - p + 1); |
| 1577 | struct passwd *pw; |
| 1578 | bcopy (p, o, s - p); |
| 1579 | o [s - p] = 0; |
| 1580 | |
| 1581 | /* If we have ~user and `user' exists, discard |
| 1582 | everything up to ~. But if `user' does not exist, leave |
| 1583 | ~user alone, it might be a literal file name. */ |
| 1584 | BLOCK_INPUT; |
| 1585 | pw = getpwnam (o + 1); |
| 1586 | UNBLOCK_INPUT; |
| 1587 | if (pw) |
| 1588 | return p; |
| 1589 | } |
| 1590 | else |
| 1591 | return p; |
| 1592 | } |
| 1593 | } |
| 1594 | return NULL; |
| 1595 | } |
| 1596 | |
| 1597 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
| 1598 | Ssubstitute_in_file_name, 1, 1, 0, |
| 1599 | doc: /* Substitute environment variables referred to in FILENAME. |
| 1600 | `$FOO' where FOO is an environment variable name means to substitute |
| 1601 | the value of that variable. The variable name should be terminated |
| 1602 | with a character not a letter, digit or underscore; otherwise, enclose |
| 1603 | the entire variable name in braces. |
| 1604 | If `/~' appears, all of FILENAME through that `/' is discarded. */) |
| 1605 | (filename) |
| 1606 | Lisp_Object filename; |
| 1607 | { |
| 1608 | unsigned char *nm; |
| 1609 | |
| 1610 | register unsigned char *s, *p, *o, *x, *endp; |
| 1611 | unsigned char *target = NULL; |
| 1612 | int total = 0; |
| 1613 | int substituted = 0; |
| 1614 | unsigned char *xnm; |
| 1615 | Lisp_Object handler; |
| 1616 | |
| 1617 | CHECK_STRING (filename); |
| 1618 | |
| 1619 | /* If the file name has special constructs in it, |
| 1620 | call the corresponding file handler. */ |
| 1621 | handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
| 1622 | if (!NILP (handler)) |
| 1623 | return call2 (handler, Qsubstitute_in_file_name, filename); |
| 1624 | |
| 1625 | nm = SDATA (filename); |
| 1626 | #ifdef DOS_NT |
| 1627 | nm = strcpy (alloca (strlen (nm) + 1), nm); |
| 1628 | CORRECT_DIR_SEPS (nm); |
| 1629 | substituted = (strcmp (nm, SDATA (filename)) != 0); |
| 1630 | #endif |
| 1631 | endp = nm + SBYTES (filename); |
| 1632 | |
| 1633 | /* If /~ or // appears, discard everything through first slash. */ |
| 1634 | p = search_embedded_absfilename (nm, endp); |
| 1635 | if (p) |
| 1636 | /* Start over with the new string, so we check the file-name-handler |
| 1637 | again. Important with filenames like "/home/foo//:/hello///there" |
| 1638 | which whould substitute to "/:/hello///there" rather than "/there". */ |
| 1639 | return Fsubstitute_in_file_name |
| 1640 | (make_specified_string (p, -1, endp - p, |
| 1641 | STRING_MULTIBYTE (filename))); |
| 1642 | |
| 1643 | |
| 1644 | /* See if any variables are substituted into the string |
| 1645 | and find the total length of their values in `total' */ |
| 1646 | |
| 1647 | for (p = nm; p != endp;) |
| 1648 | if (*p != '$') |
| 1649 | p++; |
| 1650 | else |
| 1651 | { |
| 1652 | p++; |
| 1653 | if (p == endp) |
| 1654 | goto badsubst; |
| 1655 | else if (*p == '$') |
| 1656 | { |
| 1657 | /* "$$" means a single "$" */ |
| 1658 | p++; |
| 1659 | total -= 1; |
| 1660 | substituted = 1; |
| 1661 | continue; |
| 1662 | } |
| 1663 | else if (*p == '{') |
| 1664 | { |
| 1665 | o = ++p; |
| 1666 | while (p != endp && *p != '}') p++; |
| 1667 | if (*p != '}') goto missingclose; |
| 1668 | s = p; |
| 1669 | } |
| 1670 | else |
| 1671 | { |
| 1672 | o = p; |
| 1673 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1674 | s = p; |
| 1675 | } |
| 1676 | |
| 1677 | /* Copy out the variable name */ |
| 1678 | target = (unsigned char *) alloca (s - o + 1); |
| 1679 | strncpy (target, o, s - o); |
| 1680 | target[s - o] = 0; |
| 1681 | #ifdef DOS_NT |
| 1682 | strupr (target); /* $home == $HOME etc. */ |
| 1683 | #endif /* DOS_NT */ |
| 1684 | |
| 1685 | /* Get variable value */ |
| 1686 | o = (unsigned char *) egetenv (target); |
| 1687 | if (o) |
| 1688 | { /* Eight-bit chars occupy upto 2 bytes in multibyte. */ |
| 1689 | total += strlen (o) * (STRING_MULTIBYTE (filename) ? 2 : 1); |
| 1690 | substituted = 1; |
| 1691 | } |
| 1692 | else if (*p == '}') |
| 1693 | goto badvar; |
| 1694 | } |
| 1695 | |
| 1696 | if (!substituted) |
| 1697 | return filename; |
| 1698 | |
| 1699 | /* If substitution required, recopy the string and do it */ |
| 1700 | /* Make space in stack frame for the new copy */ |
| 1701 | xnm = (unsigned char *) alloca (SBYTES (filename) + total + 1); |
| 1702 | x = xnm; |
| 1703 | |
| 1704 | /* Copy the rest of the name through, replacing $ constructs with values */ |
| 1705 | for (p = nm; *p;) |
| 1706 | if (*p != '$') |
| 1707 | *x++ = *p++; |
| 1708 | else |
| 1709 | { |
| 1710 | p++; |
| 1711 | if (p == endp) |
| 1712 | goto badsubst; |
| 1713 | else if (*p == '$') |
| 1714 | { |
| 1715 | *x++ = *p++; |
| 1716 | continue; |
| 1717 | } |
| 1718 | else if (*p == '{') |
| 1719 | { |
| 1720 | o = ++p; |
| 1721 | while (p != endp && *p != '}') p++; |
| 1722 | if (*p != '}') goto missingclose; |
| 1723 | s = p++; |
| 1724 | } |
| 1725 | else |
| 1726 | { |
| 1727 | o = p; |
| 1728 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1729 | s = p; |
| 1730 | } |
| 1731 | |
| 1732 | /* Copy out the variable name */ |
| 1733 | target = (unsigned char *) alloca (s - o + 1); |
| 1734 | strncpy (target, o, s - o); |
| 1735 | target[s - o] = 0; |
| 1736 | #ifdef DOS_NT |
| 1737 | strupr (target); /* $home == $HOME etc. */ |
| 1738 | #endif /* DOS_NT */ |
| 1739 | |
| 1740 | /* Get variable value */ |
| 1741 | o = (unsigned char *) egetenv (target); |
| 1742 | if (!o) |
| 1743 | { |
| 1744 | *x++ = '$'; |
| 1745 | strcpy (x, target); x+= strlen (target); |
| 1746 | } |
| 1747 | else if (STRING_MULTIBYTE (filename)) |
| 1748 | { |
| 1749 | /* If the original string is multibyte, |
| 1750 | convert what we substitute into multibyte. */ |
| 1751 | while (*o) |
| 1752 | { |
| 1753 | int c = *o++; |
| 1754 | c = unibyte_char_to_multibyte (c); |
| 1755 | x += CHAR_STRING (c, x); |
| 1756 | } |
| 1757 | } |
| 1758 | else |
| 1759 | { |
| 1760 | strcpy (x, o); |
| 1761 | x += strlen (o); |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | *x = 0; |
| 1766 | |
| 1767 | /* If /~ or // appears, discard everything through first slash. */ |
| 1768 | while ((p = search_embedded_absfilename (xnm, x))) |
| 1769 | /* This time we do not start over because we've already expanded envvars |
| 1770 | and replaced $$ with $. Maybe we should start over as well, but we'd |
| 1771 | need to quote some $ to $$ first. */ |
| 1772 | xnm = p; |
| 1773 | |
| 1774 | return make_specified_string (xnm, -1, x - xnm, STRING_MULTIBYTE (filename)); |
| 1775 | |
| 1776 | badsubst: |
| 1777 | error ("Bad format environment-variable substitution"); |
| 1778 | missingclose: |
| 1779 | error ("Missing \"}\" in environment-variable substitution"); |
| 1780 | badvar: |
| 1781 | error ("Substituting nonexistent environment variable \"%s\"", target); |
| 1782 | |
| 1783 | /* NOTREACHED */ |
| 1784 | return Qnil; |
| 1785 | } |
| 1786 | \f |
| 1787 | /* A slightly faster and more convenient way to get |
| 1788 | (directory-file-name (expand-file-name FOO)). */ |
| 1789 | |
| 1790 | Lisp_Object |
| 1791 | expand_and_dir_to_file (filename, defdir) |
| 1792 | Lisp_Object filename, defdir; |
| 1793 | { |
| 1794 | register Lisp_Object absname; |
| 1795 | |
| 1796 | absname = Fexpand_file_name (filename, defdir); |
| 1797 | |
| 1798 | /* Remove final slash, if any (unless this is the root dir). |
| 1799 | stat behaves differently depending! */ |
| 1800 | if (SCHARS (absname) > 1 |
| 1801 | && IS_DIRECTORY_SEP (SREF (absname, SBYTES (absname) - 1)) |
| 1802 | && !IS_DEVICE_SEP (SREF (absname, SBYTES (absname)-2))) |
| 1803 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1804 | absname = Fdirectory_file_name (absname); |
| 1805 | return absname; |
| 1806 | } |
| 1807 | \f |
| 1808 | /* Signal an error if the file ABSNAME already exists. |
| 1809 | If INTERACTIVE is nonzero, ask the user whether to proceed, |
| 1810 | and bypass the error if the user says to go ahead. |
| 1811 | QUERYSTRING is a name for the action that is being considered |
| 1812 | to alter the file. |
| 1813 | |
| 1814 | *STATPTR is used to store the stat information if the file exists. |
| 1815 | If the file does not exist, STATPTR->st_mode is set to 0. |
| 1816 | If STATPTR is null, we don't store into it. |
| 1817 | |
| 1818 | If QUICK is nonzero, we ask for y or n, not yes or no. */ |
| 1819 | |
| 1820 | void |
| 1821 | barf_or_query_if_file_exists (absname, querystring, interactive, statptr, quick) |
| 1822 | Lisp_Object absname; |
| 1823 | unsigned char *querystring; |
| 1824 | int interactive; |
| 1825 | struct stat *statptr; |
| 1826 | int quick; |
| 1827 | { |
| 1828 | register Lisp_Object tem, encoded_filename; |
| 1829 | struct stat statbuf; |
| 1830 | struct gcpro gcpro1; |
| 1831 | |
| 1832 | encoded_filename = ENCODE_FILE (absname); |
| 1833 | |
| 1834 | /* stat is a good way to tell whether the file exists, |
| 1835 | regardless of what access permissions it has. */ |
| 1836 | if (lstat (SDATA (encoded_filename), &statbuf) >= 0) |
| 1837 | { |
| 1838 | if (! interactive) |
| 1839 | xsignal2 (Qfile_already_exists, |
| 1840 | build_string ("File already exists"), absname); |
| 1841 | GCPRO1 (absname); |
| 1842 | tem = format2 ("File %s already exists; %s anyway? ", |
| 1843 | absname, build_string (querystring)); |
| 1844 | if (quick) |
| 1845 | tem = Fy_or_n_p (tem); |
| 1846 | else |
| 1847 | tem = do_yes_or_no_p (tem); |
| 1848 | UNGCPRO; |
| 1849 | if (NILP (tem)) |
| 1850 | xsignal2 (Qfile_already_exists, |
| 1851 | build_string ("File already exists"), absname); |
| 1852 | if (statptr) |
| 1853 | *statptr = statbuf; |
| 1854 | } |
| 1855 | else |
| 1856 | { |
| 1857 | if (statptr) |
| 1858 | statptr->st_mode = 0; |
| 1859 | } |
| 1860 | return; |
| 1861 | } |
| 1862 | |
| 1863 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 5, |
| 1864 | "fCopy file: \nGCopy %s to file: \np\nP", |
| 1865 | doc: /* Copy FILE to NEWNAME. Both args must be strings. |
| 1866 | If NEWNAME names a directory, copy FILE there. |
| 1867 | |
| 1868 | This function always sets the file modes of the output file to match |
| 1869 | the input file. |
| 1870 | |
| 1871 | The optional third argument OK-IF-ALREADY-EXISTS specifies what to do |
| 1872 | if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we |
| 1873 | signal a `file-already-exists' error without overwriting. If |
| 1874 | OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user |
| 1875 | about overwriting; this is what happens in interactive use with M-x. |
| 1876 | Any other value for OK-IF-ALREADY-EXISTS means to overwrite the |
| 1877 | existing file. |
| 1878 | |
| 1879 | Fourth arg KEEP-TIME non-nil means give the output file the same |
| 1880 | last-modified time as the old one. (This works on only some systems.) |
| 1881 | |
| 1882 | A prefix arg makes KEEP-TIME non-nil. |
| 1883 | |
| 1884 | If PRESERVE-UID-GID is non-nil, we try to transfer the |
| 1885 | uid and gid of FILE to NEWNAME. */) |
| 1886 | (file, newname, ok_if_already_exists, keep_time, preserve_uid_gid) |
| 1887 | Lisp_Object file, newname, ok_if_already_exists, keep_time; |
| 1888 | Lisp_Object preserve_uid_gid; |
| 1889 | { |
| 1890 | int ifd, ofd, n; |
| 1891 | char buf[16 * 1024]; |
| 1892 | struct stat st, out_st; |
| 1893 | Lisp_Object handler; |
| 1894 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 1895 | int count = SPECPDL_INDEX (); |
| 1896 | int input_file_statable_p; |
| 1897 | Lisp_Object encoded_file, encoded_newname; |
| 1898 | |
| 1899 | encoded_file = encoded_newname = Qnil; |
| 1900 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
| 1901 | CHECK_STRING (file); |
| 1902 | CHECK_STRING (newname); |
| 1903 | |
| 1904 | if (!NILP (Ffile_directory_p (newname))) |
| 1905 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
| 1906 | else |
| 1907 | newname = Fexpand_file_name (newname, Qnil); |
| 1908 | |
| 1909 | file = Fexpand_file_name (file, Qnil); |
| 1910 | |
| 1911 | /* If the input file name has special constructs in it, |
| 1912 | call the corresponding file handler. */ |
| 1913 | handler = Ffind_file_name_handler (file, Qcopy_file); |
| 1914 | /* Likewise for output file name. */ |
| 1915 | if (NILP (handler)) |
| 1916 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
| 1917 | if (!NILP (handler)) |
| 1918 | RETURN_UNGCPRO (call6 (handler, Qcopy_file, file, newname, |
| 1919 | ok_if_already_exists, keep_time, preserve_uid_gid)); |
| 1920 | |
| 1921 | encoded_file = ENCODE_FILE (file); |
| 1922 | encoded_newname = ENCODE_FILE (newname); |
| 1923 | |
| 1924 | if (NILP (ok_if_already_exists) |
| 1925 | || INTEGERP (ok_if_already_exists)) |
| 1926 | barf_or_query_if_file_exists (newname, "copy to it", |
| 1927 | INTEGERP (ok_if_already_exists), &out_st, 0); |
| 1928 | else if (stat (SDATA (encoded_newname), &out_st) < 0) |
| 1929 | out_st.st_mode = 0; |
| 1930 | |
| 1931 | #ifdef WINDOWSNT |
| 1932 | if (!CopyFile (SDATA (encoded_file), |
| 1933 | SDATA (encoded_newname), |
| 1934 | FALSE)) |
| 1935 | report_file_error ("Copying file", Fcons (file, Fcons (newname, Qnil))); |
| 1936 | /* CopyFile retains the timestamp by default. */ |
| 1937 | else if (NILP (keep_time)) |
| 1938 | { |
| 1939 | EMACS_TIME now; |
| 1940 | DWORD attributes; |
| 1941 | char * filename; |
| 1942 | |
| 1943 | EMACS_GET_TIME (now); |
| 1944 | filename = SDATA (encoded_newname); |
| 1945 | |
| 1946 | /* Ensure file is writable while its modified time is set. */ |
| 1947 | attributes = GetFileAttributes (filename); |
| 1948 | SetFileAttributes (filename, attributes & ~FILE_ATTRIBUTE_READONLY); |
| 1949 | if (set_file_times (filename, now, now)) |
| 1950 | { |
| 1951 | /* Restore original attributes. */ |
| 1952 | SetFileAttributes (filename, attributes); |
| 1953 | xsignal2 (Qfile_date_error, |
| 1954 | build_string ("Cannot set file date"), newname); |
| 1955 | } |
| 1956 | /* Restore original attributes. */ |
| 1957 | SetFileAttributes (filename, attributes); |
| 1958 | } |
| 1959 | #else /* not WINDOWSNT */ |
| 1960 | immediate_quit = 1; |
| 1961 | ifd = emacs_open (SDATA (encoded_file), O_RDONLY, 0); |
| 1962 | immediate_quit = 0; |
| 1963 | |
| 1964 | if (ifd < 0) |
| 1965 | report_file_error ("Opening input file", Fcons (file, Qnil)); |
| 1966 | |
| 1967 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
| 1968 | |
| 1969 | /* We can only copy regular files and symbolic links. Other files are not |
| 1970 | copyable by us. */ |
| 1971 | input_file_statable_p = (fstat (ifd, &st) >= 0); |
| 1972 | |
| 1973 | #if !defined (MSDOS) || __DJGPP__ > 1 |
| 1974 | if (out_st.st_mode != 0 |
| 1975 | && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) |
| 1976 | { |
| 1977 | errno = 0; |
| 1978 | report_file_error ("Input and output files are the same", |
| 1979 | Fcons (file, Fcons (newname, Qnil))); |
| 1980 | } |
| 1981 | #endif |
| 1982 | |
| 1983 | #if defined (S_ISREG) && defined (S_ISLNK) |
| 1984 | if (input_file_statable_p) |
| 1985 | { |
| 1986 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) |
| 1987 | { |
| 1988 | #if defined (EISDIR) |
| 1989 | /* Get a better looking error message. */ |
| 1990 | errno = EISDIR; |
| 1991 | #endif /* EISDIR */ |
| 1992 | report_file_error ("Non-regular file", Fcons (file, Qnil)); |
| 1993 | } |
| 1994 | } |
| 1995 | #endif /* S_ISREG && S_ISLNK */ |
| 1996 | |
| 1997 | #ifdef MSDOS |
| 1998 | /* System's default file type was set to binary by _fmode in emacs.c. */ |
| 1999 | ofd = emacs_open (SDATA (encoded_newname), |
| 2000 | O_WRONLY | O_TRUNC | O_CREAT |
| 2001 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
| 2002 | S_IREAD | S_IWRITE); |
| 2003 | #else /* not MSDOS */ |
| 2004 | ofd = emacs_open (SDATA (encoded_newname), |
| 2005 | O_WRONLY | O_TRUNC | O_CREAT |
| 2006 | | (NILP (ok_if_already_exists) ? O_EXCL : 0), |
| 2007 | 0666); |
| 2008 | #endif /* not MSDOS */ |
| 2009 | if (ofd < 0) |
| 2010 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
| 2011 | |
| 2012 | record_unwind_protect (close_file_unwind, make_number (ofd)); |
| 2013 | |
| 2014 | immediate_quit = 1; |
| 2015 | QUIT; |
| 2016 | while ((n = emacs_read (ifd, buf, sizeof buf)) > 0) |
| 2017 | if (emacs_write (ofd, buf, n) != n) |
| 2018 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 2019 | immediate_quit = 0; |
| 2020 | |
| 2021 | #ifndef MSDOS |
| 2022 | /* Preserve the original file modes, and if requested, also its |
| 2023 | owner and group. */ |
| 2024 | if (input_file_statable_p) |
| 2025 | { |
| 2026 | if (! NILP (preserve_uid_gid)) |
| 2027 | fchown (ofd, st.st_uid, st.st_gid); |
| 2028 | fchmod (ofd, st.st_mode & 07777); |
| 2029 | } |
| 2030 | #endif /* not MSDOS */ |
| 2031 | |
| 2032 | /* Closing the output clobbers the file times on some systems. */ |
| 2033 | if (emacs_close (ofd) < 0) |
| 2034 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 2035 | |
| 2036 | if (input_file_statable_p) |
| 2037 | { |
| 2038 | if (!NILP (keep_time)) |
| 2039 | { |
| 2040 | EMACS_TIME atime, mtime; |
| 2041 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); |
| 2042 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); |
| 2043 | if (set_file_times (SDATA (encoded_newname), |
| 2044 | atime, mtime)) |
| 2045 | xsignal2 (Qfile_date_error, |
| 2046 | build_string ("Cannot set file date"), newname); |
| 2047 | } |
| 2048 | } |
| 2049 | |
| 2050 | emacs_close (ifd); |
| 2051 | |
| 2052 | #if defined (__DJGPP__) && __DJGPP__ > 1 |
| 2053 | if (input_file_statable_p) |
| 2054 | { |
| 2055 | /* In DJGPP v2.0 and later, fstat usually returns true file mode bits, |
| 2056 | and if it can't, it tells so. Otherwise, under MSDOS we usually |
| 2057 | get only the READ bit, which will make the copied file read-only, |
| 2058 | so it's better not to chmod at all. */ |
| 2059 | if ((_djstat_flags & _STFAIL_WRITEBIT) == 0) |
| 2060 | chmod (SDATA (encoded_newname), st.st_mode & 07777); |
| 2061 | } |
| 2062 | #endif /* DJGPP version 2 or newer */ |
| 2063 | #endif /* not WINDOWSNT */ |
| 2064 | |
| 2065 | /* Discard the unwind protects. */ |
| 2066 | specpdl_ptr = specpdl + count; |
| 2067 | |
| 2068 | UNGCPRO; |
| 2069 | return Qnil; |
| 2070 | } |
| 2071 | \f |
| 2072 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
| 2073 | Smake_directory_internal, 1, 1, 0, |
| 2074 | doc: /* Create a new directory named DIRECTORY. */) |
| 2075 | (directory) |
| 2076 | Lisp_Object directory; |
| 2077 | { |
| 2078 | const unsigned char *dir; |
| 2079 | Lisp_Object handler; |
| 2080 | Lisp_Object encoded_dir; |
| 2081 | |
| 2082 | CHECK_STRING (directory); |
| 2083 | directory = Fexpand_file_name (directory, Qnil); |
| 2084 | |
| 2085 | handler = Ffind_file_name_handler (directory, Qmake_directory_internal); |
| 2086 | if (!NILP (handler)) |
| 2087 | return call2 (handler, Qmake_directory_internal, directory); |
| 2088 | |
| 2089 | encoded_dir = ENCODE_FILE (directory); |
| 2090 | |
| 2091 | dir = SDATA (encoded_dir); |
| 2092 | |
| 2093 | #ifdef WINDOWSNT |
| 2094 | if (mkdir (dir) != 0) |
| 2095 | #else |
| 2096 | if (mkdir (dir, 0777) != 0) |
| 2097 | #endif |
| 2098 | report_file_error ("Creating directory", list1 (directory)); |
| 2099 | |
| 2100 | return Qnil; |
| 2101 | } |
| 2102 | |
| 2103 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
| 2104 | doc: /* Delete the directory named DIRECTORY. Does not follow symlinks. */) |
| 2105 | (directory) |
| 2106 | Lisp_Object directory; |
| 2107 | { |
| 2108 | const unsigned char *dir; |
| 2109 | Lisp_Object handler; |
| 2110 | Lisp_Object encoded_dir; |
| 2111 | |
| 2112 | CHECK_STRING (directory); |
| 2113 | directory = Fdirectory_file_name (Fexpand_file_name (directory, Qnil)); |
| 2114 | |
| 2115 | handler = Ffind_file_name_handler (directory, Qdelete_directory); |
| 2116 | if (!NILP (handler)) |
| 2117 | return call2 (handler, Qdelete_directory, directory); |
| 2118 | |
| 2119 | if (delete_by_moving_to_trash) |
| 2120 | return call1 (Qmove_file_to_trash, directory); |
| 2121 | |
| 2122 | encoded_dir = ENCODE_FILE (directory); |
| 2123 | |
| 2124 | dir = SDATA (encoded_dir); |
| 2125 | |
| 2126 | if (rmdir (dir) != 0) |
| 2127 | report_file_error ("Removing directory", list1 (directory)); |
| 2128 | |
| 2129 | return Qnil; |
| 2130 | } |
| 2131 | |
| 2132 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", |
| 2133 | doc: /* Delete file named FILENAME. If it is a symlink, remove the symlink. |
| 2134 | If file has multiple names, it continues to exist with the other names. */) |
| 2135 | (filename) |
| 2136 | Lisp_Object filename; |
| 2137 | { |
| 2138 | Lisp_Object handler; |
| 2139 | Lisp_Object encoded_file; |
| 2140 | struct gcpro gcpro1; |
| 2141 | |
| 2142 | GCPRO1 (filename); |
| 2143 | if (!NILP (Ffile_directory_p (filename)) |
| 2144 | && NILP (Ffile_symlink_p (filename))) |
| 2145 | xsignal2 (Qfile_error, |
| 2146 | build_string ("Removing old name: is a directory"), |
| 2147 | filename); |
| 2148 | UNGCPRO; |
| 2149 | filename = Fexpand_file_name (filename, Qnil); |
| 2150 | |
| 2151 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
| 2152 | if (!NILP (handler)) |
| 2153 | return call2 (handler, Qdelete_file, filename); |
| 2154 | |
| 2155 | if (delete_by_moving_to_trash) |
| 2156 | return call1 (Qmove_file_to_trash, filename); |
| 2157 | |
| 2158 | encoded_file = ENCODE_FILE (filename); |
| 2159 | |
| 2160 | if (0 > unlink (SDATA (encoded_file))) |
| 2161 | report_file_error ("Removing old name", list1 (filename)); |
| 2162 | return Qnil; |
| 2163 | } |
| 2164 | |
| 2165 | static Lisp_Object |
| 2166 | internal_delete_file_1 (ignore) |
| 2167 | Lisp_Object ignore; |
| 2168 | { |
| 2169 | return Qt; |
| 2170 | } |
| 2171 | |
| 2172 | /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ |
| 2173 | |
| 2174 | int |
| 2175 | internal_delete_file (filename) |
| 2176 | Lisp_Object filename; |
| 2177 | { |
| 2178 | Lisp_Object tem; |
| 2179 | tem = internal_condition_case_1 (Fdelete_file, filename, |
| 2180 | Qt, internal_delete_file_1); |
| 2181 | return NILP (tem); |
| 2182 | } |
| 2183 | \f |
| 2184 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
| 2185 | "fRename file: \nGRename %s to file: \np", |
| 2186 | doc: /* Rename FILE as NEWNAME. Both args must be strings. |
| 2187 | If file has names other than FILE, it continues to have those names. |
| 2188 | Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2189 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. |
| 2190 | A number as third arg means request confirmation if NEWNAME already exists. |
| 2191 | This is what happens in interactive use with M-x. */) |
| 2192 | (file, newname, ok_if_already_exists) |
| 2193 | Lisp_Object file, newname, ok_if_already_exists; |
| 2194 | { |
| 2195 | Lisp_Object handler; |
| 2196 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 2197 | Lisp_Object encoded_file, encoded_newname, symlink_target; |
| 2198 | |
| 2199 | symlink_target = encoded_file = encoded_newname = Qnil; |
| 2200 | GCPRO5 (file, newname, encoded_file, encoded_newname, symlink_target); |
| 2201 | CHECK_STRING (file); |
| 2202 | CHECK_STRING (newname); |
| 2203 | file = Fexpand_file_name (file, Qnil); |
| 2204 | |
| 2205 | if ((!NILP (Ffile_directory_p (newname))) |
| 2206 | #ifdef DOS_NT |
| 2207 | /* If the file names are identical but for the case, |
| 2208 | don't attempt to move directory to itself. */ |
| 2209 | && (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) |
| 2210 | #endif |
| 2211 | ) |
| 2212 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
| 2213 | else |
| 2214 | newname = Fexpand_file_name (newname, Qnil); |
| 2215 | |
| 2216 | /* If the file name has special constructs in it, |
| 2217 | call the corresponding file handler. */ |
| 2218 | handler = Ffind_file_name_handler (file, Qrename_file); |
| 2219 | if (NILP (handler)) |
| 2220 | handler = Ffind_file_name_handler (newname, Qrename_file); |
| 2221 | if (!NILP (handler)) |
| 2222 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
| 2223 | file, newname, ok_if_already_exists)); |
| 2224 | |
| 2225 | encoded_file = ENCODE_FILE (file); |
| 2226 | encoded_newname = ENCODE_FILE (newname); |
| 2227 | |
| 2228 | #ifdef DOS_NT |
| 2229 | /* If the file names are identical but for the case, don't ask for |
| 2230 | confirmation: they simply want to change the letter-case of the |
| 2231 | file name. */ |
| 2232 | if (NILP (Fstring_equal (Fdowncase (file), Fdowncase (newname)))) |
| 2233 | #endif |
| 2234 | if (NILP (ok_if_already_exists) |
| 2235 | || INTEGERP (ok_if_already_exists)) |
| 2236 | barf_or_query_if_file_exists (newname, "rename to it", |
| 2237 | INTEGERP (ok_if_already_exists), 0, 0); |
| 2238 | if (0 > rename (SDATA (encoded_file), SDATA (encoded_newname))) |
| 2239 | { |
| 2240 | if (errno == EXDEV) |
| 2241 | { |
| 2242 | int count; |
| 2243 | #ifdef S_IFLNK |
| 2244 | symlink_target = Ffile_symlink_p (file); |
| 2245 | if (! NILP (symlink_target)) |
| 2246 | Fmake_symbolic_link (symlink_target, newname, |
| 2247 | NILP (ok_if_already_exists) ? Qnil : Qt); |
| 2248 | else |
| 2249 | #endif |
| 2250 | Fcopy_file (file, newname, |
| 2251 | /* We have already prompted if it was an integer, |
| 2252 | so don't have copy-file prompt again. */ |
| 2253 | NILP (ok_if_already_exists) ? Qnil : Qt, |
| 2254 | Qt, Qt); |
| 2255 | |
| 2256 | count = SPECPDL_INDEX (); |
| 2257 | specbind (Qdelete_by_moving_to_trash, Qnil); |
| 2258 | Fdelete_file (file); |
| 2259 | unbind_to (count, Qnil); |
| 2260 | } |
| 2261 | else |
| 2262 | report_file_error ("Renaming", list2 (file, newname)); |
| 2263 | } |
| 2264 | UNGCPRO; |
| 2265 | return Qnil; |
| 2266 | } |
| 2267 | |
| 2268 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, |
| 2269 | "fAdd name to file: \nGName to add to %s: \np", |
| 2270 | doc: /* Give FILE additional name NEWNAME. Both args must be strings. |
| 2271 | Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2272 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. |
| 2273 | A number as third arg means request confirmation if NEWNAME already exists. |
| 2274 | This is what happens in interactive use with M-x. */) |
| 2275 | (file, newname, ok_if_already_exists) |
| 2276 | Lisp_Object file, newname, ok_if_already_exists; |
| 2277 | { |
| 2278 | Lisp_Object handler; |
| 2279 | Lisp_Object encoded_file, encoded_newname; |
| 2280 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2281 | |
| 2282 | GCPRO4 (file, newname, encoded_file, encoded_newname); |
| 2283 | encoded_file = encoded_newname = Qnil; |
| 2284 | CHECK_STRING (file); |
| 2285 | CHECK_STRING (newname); |
| 2286 | file = Fexpand_file_name (file, Qnil); |
| 2287 | |
| 2288 | if (!NILP (Ffile_directory_p (newname))) |
| 2289 | newname = Fexpand_file_name (Ffile_name_nondirectory (file), newname); |
| 2290 | else |
| 2291 | newname = Fexpand_file_name (newname, Qnil); |
| 2292 | |
| 2293 | /* If the file name has special constructs in it, |
| 2294 | call the corresponding file handler. */ |
| 2295 | handler = Ffind_file_name_handler (file, Qadd_name_to_file); |
| 2296 | if (!NILP (handler)) |
| 2297 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
| 2298 | newname, ok_if_already_exists)); |
| 2299 | |
| 2300 | /* If the new name has special constructs in it, |
| 2301 | call the corresponding file handler. */ |
| 2302 | handler = Ffind_file_name_handler (newname, Qadd_name_to_file); |
| 2303 | if (!NILP (handler)) |
| 2304 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, file, |
| 2305 | newname, ok_if_already_exists)); |
| 2306 | |
| 2307 | encoded_file = ENCODE_FILE (file); |
| 2308 | encoded_newname = ENCODE_FILE (newname); |
| 2309 | |
| 2310 | if (NILP (ok_if_already_exists) |
| 2311 | || INTEGERP (ok_if_already_exists)) |
| 2312 | barf_or_query_if_file_exists (newname, "make it a new name", |
| 2313 | INTEGERP (ok_if_already_exists), 0, 0); |
| 2314 | |
| 2315 | unlink (SDATA (newname)); |
| 2316 | if (0 > link (SDATA (encoded_file), SDATA (encoded_newname))) |
| 2317 | report_file_error ("Adding new name", list2 (file, newname)); |
| 2318 | |
| 2319 | UNGCPRO; |
| 2320 | return Qnil; |
| 2321 | } |
| 2322 | |
| 2323 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
| 2324 | "FMake symbolic link to file: \nGMake symbolic link to file %s: \np", |
| 2325 | doc: /* Make a symbolic link to FILENAME, named LINKNAME. |
| 2326 | Both args must be strings. |
| 2327 | Signals a `file-already-exists' error if a file LINKNAME already exists |
| 2328 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. |
| 2329 | A number as third arg means request confirmation if LINKNAME already exists. |
| 2330 | This happens for interactive use with M-x. */) |
| 2331 | (filename, linkname, ok_if_already_exists) |
| 2332 | Lisp_Object filename, linkname, ok_if_already_exists; |
| 2333 | { |
| 2334 | Lisp_Object handler; |
| 2335 | Lisp_Object encoded_filename, encoded_linkname; |
| 2336 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2337 | |
| 2338 | GCPRO4 (filename, linkname, encoded_filename, encoded_linkname); |
| 2339 | encoded_filename = encoded_linkname = Qnil; |
| 2340 | CHECK_STRING (filename); |
| 2341 | CHECK_STRING (linkname); |
| 2342 | /* If the link target has a ~, we must expand it to get |
| 2343 | a truly valid file name. Otherwise, do not expand; |
| 2344 | we want to permit links to relative file names. */ |
| 2345 | if (SREF (filename, 0) == '~') |
| 2346 | filename = Fexpand_file_name (filename, Qnil); |
| 2347 | |
| 2348 | if (!NILP (Ffile_directory_p (linkname))) |
| 2349 | linkname = Fexpand_file_name (Ffile_name_nondirectory (filename), linkname); |
| 2350 | else |
| 2351 | linkname = Fexpand_file_name (linkname, Qnil); |
| 2352 | |
| 2353 | /* If the file name has special constructs in it, |
| 2354 | call the corresponding file handler. */ |
| 2355 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
| 2356 | if (!NILP (handler)) |
| 2357 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
| 2358 | linkname, ok_if_already_exists)); |
| 2359 | |
| 2360 | /* If the new link name has special constructs in it, |
| 2361 | call the corresponding file handler. */ |
| 2362 | handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); |
| 2363 | if (!NILP (handler)) |
| 2364 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
| 2365 | linkname, ok_if_already_exists)); |
| 2366 | |
| 2367 | #ifdef S_IFLNK |
| 2368 | encoded_filename = ENCODE_FILE (filename); |
| 2369 | encoded_linkname = ENCODE_FILE (linkname); |
| 2370 | |
| 2371 | if (NILP (ok_if_already_exists) |
| 2372 | || INTEGERP (ok_if_already_exists)) |
| 2373 | barf_or_query_if_file_exists (linkname, "make it a link", |
| 2374 | INTEGERP (ok_if_already_exists), 0, 0); |
| 2375 | if (0 > symlink (SDATA (encoded_filename), |
| 2376 | SDATA (encoded_linkname))) |
| 2377 | { |
| 2378 | /* If we didn't complain already, silently delete existing file. */ |
| 2379 | if (errno == EEXIST) |
| 2380 | { |
| 2381 | unlink (SDATA (encoded_linkname)); |
| 2382 | if (0 <= symlink (SDATA (encoded_filename), |
| 2383 | SDATA (encoded_linkname))) |
| 2384 | { |
| 2385 | UNGCPRO; |
| 2386 | return Qnil; |
| 2387 | } |
| 2388 | } |
| 2389 | |
| 2390 | report_file_error ("Making symbolic link", list2 (filename, linkname)); |
| 2391 | } |
| 2392 | UNGCPRO; |
| 2393 | return Qnil; |
| 2394 | |
| 2395 | #else |
| 2396 | UNGCPRO; |
| 2397 | xsignal1 (Qfile_error, build_string ("Symbolic links are not supported")); |
| 2398 | |
| 2399 | #endif /* S_IFLNK */ |
| 2400 | } |
| 2401 | |
| 2402 | \f |
| 2403 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
| 2404 | 1, 1, 0, |
| 2405 | doc: /* Return t if file FILENAME specifies an absolute file name. |
| 2406 | On Unix, this is a name starting with a `/' or a `~'. */) |
| 2407 | (filename) |
| 2408 | Lisp_Object filename; |
| 2409 | { |
| 2410 | CHECK_STRING (filename); |
| 2411 | return file_name_absolute_p (SDATA (filename)) ? Qt : Qnil; |
| 2412 | } |
| 2413 | \f |
| 2414 | /* Return nonzero if file FILENAME exists and can be executed. */ |
| 2415 | |
| 2416 | static int |
| 2417 | check_executable (filename) |
| 2418 | char *filename; |
| 2419 | { |
| 2420 | #ifdef DOS_NT |
| 2421 | int len = strlen (filename); |
| 2422 | char *suffix; |
| 2423 | struct stat st; |
| 2424 | if (stat (filename, &st) < 0) |
| 2425 | return 0; |
| 2426 | #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1) |
| 2427 | return ((st.st_mode & S_IEXEC) != 0); |
| 2428 | #else |
| 2429 | return (S_ISREG (st.st_mode) |
| 2430 | && len >= 5 |
| 2431 | && (xstrcasecmp ((suffix = filename + len-4), ".com") == 0 |
| 2432 | || xstrcasecmp (suffix, ".exe") == 0 |
| 2433 | || xstrcasecmp (suffix, ".bat") == 0) |
| 2434 | || (st.st_mode & S_IFMT) == S_IFDIR); |
| 2435 | #endif /* not WINDOWSNT */ |
| 2436 | #else /* not DOS_NT */ |
| 2437 | #ifdef HAVE_EUIDACCESS |
| 2438 | return (euidaccess (filename, 1) >= 0); |
| 2439 | #else |
| 2440 | /* Access isn't quite right because it uses the real uid |
| 2441 | and we really want to test with the effective uid. |
| 2442 | But Unix doesn't give us a right way to do it. */ |
| 2443 | return (access (filename, 1) >= 0); |
| 2444 | #endif |
| 2445 | #endif /* not DOS_NT */ |
| 2446 | } |
| 2447 | |
| 2448 | /* Return nonzero if file FILENAME exists and can be written. */ |
| 2449 | |
| 2450 | static int |
| 2451 | check_writable (filename) |
| 2452 | char *filename; |
| 2453 | { |
| 2454 | #ifdef MSDOS |
| 2455 | struct stat st; |
| 2456 | if (stat (filename, &st) < 0) |
| 2457 | return 0; |
| 2458 | return (st.st_mode & S_IWRITE || (st.st_mode & S_IFMT) == S_IFDIR); |
| 2459 | #else /* not MSDOS */ |
| 2460 | #ifdef HAVE_EUIDACCESS |
| 2461 | return (euidaccess (filename, 2) >= 0); |
| 2462 | #else |
| 2463 | /* Access isn't quite right because it uses the real uid |
| 2464 | and we really want to test with the effective uid. |
| 2465 | But Unix doesn't give us a right way to do it. |
| 2466 | Opening with O_WRONLY could work for an ordinary file, |
| 2467 | but would lose for directories. */ |
| 2468 | return (access (filename, 2) >= 0); |
| 2469 | #endif |
| 2470 | #endif /* not MSDOS */ |
| 2471 | } |
| 2472 | |
| 2473 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
| 2474 | doc: /* Return t if file FILENAME exists (whether or not you can read it.) |
| 2475 | See also `file-readable-p' and `file-attributes'. |
| 2476 | This returns nil for a symlink to a nonexistent file. |
| 2477 | Use `file-symlink-p' to test for such links. */) |
| 2478 | (filename) |
| 2479 | Lisp_Object filename; |
| 2480 | { |
| 2481 | Lisp_Object absname; |
| 2482 | Lisp_Object handler; |
| 2483 | struct stat statbuf; |
| 2484 | |
| 2485 | CHECK_STRING (filename); |
| 2486 | absname = Fexpand_file_name (filename, Qnil); |
| 2487 | |
| 2488 | /* If the file name has special constructs in it, |
| 2489 | call the corresponding file handler. */ |
| 2490 | handler = Ffind_file_name_handler (absname, Qfile_exists_p); |
| 2491 | if (!NILP (handler)) |
| 2492 | return call2 (handler, Qfile_exists_p, absname); |
| 2493 | |
| 2494 | absname = ENCODE_FILE (absname); |
| 2495 | |
| 2496 | return (stat (SDATA (absname), &statbuf) >= 0) ? Qt : Qnil; |
| 2497 | } |
| 2498 | |
| 2499 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, |
| 2500 | doc: /* Return t if FILENAME can be executed by you. |
| 2501 | For a directory, this means you can access files in that directory. */) |
| 2502 | (filename) |
| 2503 | Lisp_Object filename; |
| 2504 | { |
| 2505 | Lisp_Object absname; |
| 2506 | Lisp_Object handler; |
| 2507 | |
| 2508 | CHECK_STRING (filename); |
| 2509 | absname = Fexpand_file_name (filename, Qnil); |
| 2510 | |
| 2511 | /* If the file name has special constructs in it, |
| 2512 | call the corresponding file handler. */ |
| 2513 | handler = Ffind_file_name_handler (absname, Qfile_executable_p); |
| 2514 | if (!NILP (handler)) |
| 2515 | return call2 (handler, Qfile_executable_p, absname); |
| 2516 | |
| 2517 | absname = ENCODE_FILE (absname); |
| 2518 | |
| 2519 | return (check_executable (SDATA (absname)) ? Qt : Qnil); |
| 2520 | } |
| 2521 | |
| 2522 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
| 2523 | doc: /* Return t if file FILENAME exists and you can read it. |
| 2524 | See also `file-exists-p' and `file-attributes'. */) |
| 2525 | (filename) |
| 2526 | Lisp_Object filename; |
| 2527 | { |
| 2528 | Lisp_Object absname; |
| 2529 | Lisp_Object handler; |
| 2530 | int desc; |
| 2531 | int flags; |
| 2532 | struct stat statbuf; |
| 2533 | |
| 2534 | CHECK_STRING (filename); |
| 2535 | absname = Fexpand_file_name (filename, Qnil); |
| 2536 | |
| 2537 | /* If the file name has special constructs in it, |
| 2538 | call the corresponding file handler. */ |
| 2539 | handler = Ffind_file_name_handler (absname, Qfile_readable_p); |
| 2540 | if (!NILP (handler)) |
| 2541 | return call2 (handler, Qfile_readable_p, absname); |
| 2542 | |
| 2543 | absname = ENCODE_FILE (absname); |
| 2544 | |
| 2545 | #if defined(DOS_NT) || defined(macintosh) |
| 2546 | /* Under MS-DOS, Windows, and Macintosh, open does not work for |
| 2547 | directories. */ |
| 2548 | if (access (SDATA (absname), 0) == 0) |
| 2549 | return Qt; |
| 2550 | return Qnil; |
| 2551 | #else /* not DOS_NT and not macintosh */ |
| 2552 | flags = O_RDONLY; |
| 2553 | #if defined (S_ISFIFO) && defined (O_NONBLOCK) |
| 2554 | /* Opening a fifo without O_NONBLOCK can wait. |
| 2555 | We don't want to wait. But we don't want to mess wth O_NONBLOCK |
| 2556 | except in the case of a fifo, on a system which handles it. */ |
| 2557 | desc = stat (SDATA (absname), &statbuf); |
| 2558 | if (desc < 0) |
| 2559 | return Qnil; |
| 2560 | if (S_ISFIFO (statbuf.st_mode)) |
| 2561 | flags |= O_NONBLOCK; |
| 2562 | #endif |
| 2563 | desc = emacs_open (SDATA (absname), flags, 0); |
| 2564 | if (desc < 0) |
| 2565 | return Qnil; |
| 2566 | emacs_close (desc); |
| 2567 | return Qt; |
| 2568 | #endif /* not DOS_NT and not macintosh */ |
| 2569 | } |
| 2570 | |
| 2571 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
| 2572 | on the RT/PC. */ |
| 2573 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
| 2574 | doc: /* Return t if file FILENAME can be written or created by you. */) |
| 2575 | (filename) |
| 2576 | Lisp_Object filename; |
| 2577 | { |
| 2578 | Lisp_Object absname, dir, encoded; |
| 2579 | Lisp_Object handler; |
| 2580 | struct stat statbuf; |
| 2581 | |
| 2582 | CHECK_STRING (filename); |
| 2583 | absname = Fexpand_file_name (filename, Qnil); |
| 2584 | |
| 2585 | /* If the file name has special constructs in it, |
| 2586 | call the corresponding file handler. */ |
| 2587 | handler = Ffind_file_name_handler (absname, Qfile_writable_p); |
| 2588 | if (!NILP (handler)) |
| 2589 | return call2 (handler, Qfile_writable_p, absname); |
| 2590 | |
| 2591 | encoded = ENCODE_FILE (absname); |
| 2592 | if (stat (SDATA (encoded), &statbuf) >= 0) |
| 2593 | return (check_writable (SDATA (encoded)) |
| 2594 | ? Qt : Qnil); |
| 2595 | |
| 2596 | dir = Ffile_name_directory (absname); |
| 2597 | #ifdef MSDOS |
| 2598 | if (!NILP (dir)) |
| 2599 | dir = Fdirectory_file_name (dir); |
| 2600 | #endif /* MSDOS */ |
| 2601 | |
| 2602 | dir = ENCODE_FILE (dir); |
| 2603 | #ifdef WINDOWSNT |
| 2604 | /* The read-only attribute of the parent directory doesn't affect |
| 2605 | whether a file or directory can be created within it. Some day we |
| 2606 | should check ACLs though, which do affect this. */ |
| 2607 | if (stat (SDATA (dir), &statbuf) < 0) |
| 2608 | return Qnil; |
| 2609 | return (statbuf.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; |
| 2610 | #else |
| 2611 | return (check_writable (!NILP (dir) ? (char *) SDATA (dir) : "") |
| 2612 | ? Qt : Qnil); |
| 2613 | #endif |
| 2614 | } |
| 2615 | \f |
| 2616 | DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0, |
| 2617 | doc: /* Access file FILENAME, and get an error if that does not work. |
| 2618 | The second argument STRING is used in the error message. |
| 2619 | If there is no error, returns nil. */) |
| 2620 | (filename, string) |
| 2621 | Lisp_Object filename, string; |
| 2622 | { |
| 2623 | Lisp_Object handler, encoded_filename, absname; |
| 2624 | int fd; |
| 2625 | |
| 2626 | CHECK_STRING (filename); |
| 2627 | absname = Fexpand_file_name (filename, Qnil); |
| 2628 | |
| 2629 | CHECK_STRING (string); |
| 2630 | |
| 2631 | /* If the file name has special constructs in it, |
| 2632 | call the corresponding file handler. */ |
| 2633 | handler = Ffind_file_name_handler (absname, Qaccess_file); |
| 2634 | if (!NILP (handler)) |
| 2635 | return call3 (handler, Qaccess_file, absname, string); |
| 2636 | |
| 2637 | encoded_filename = ENCODE_FILE (absname); |
| 2638 | |
| 2639 | fd = emacs_open (SDATA (encoded_filename), O_RDONLY, 0); |
| 2640 | if (fd < 0) |
| 2641 | report_file_error (SDATA (string), Fcons (filename, Qnil)); |
| 2642 | emacs_close (fd); |
| 2643 | |
| 2644 | return Qnil; |
| 2645 | } |
| 2646 | \f |
| 2647 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
| 2648 | doc: /* Return non-nil if file FILENAME is the name of a symbolic link. |
| 2649 | The value is the link target, as a string. |
| 2650 | Otherwise it returns nil. |
| 2651 | |
| 2652 | This function returns t when given the name of a symlink that |
| 2653 | points to a nonexistent file. */) |
| 2654 | (filename) |
| 2655 | Lisp_Object filename; |
| 2656 | { |
| 2657 | Lisp_Object handler; |
| 2658 | |
| 2659 | CHECK_STRING (filename); |
| 2660 | filename = Fexpand_file_name (filename, Qnil); |
| 2661 | |
| 2662 | /* If the file name has special constructs in it, |
| 2663 | call the corresponding file handler. */ |
| 2664 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
| 2665 | if (!NILP (handler)) |
| 2666 | return call2 (handler, Qfile_symlink_p, filename); |
| 2667 | |
| 2668 | #ifdef S_IFLNK |
| 2669 | { |
| 2670 | char *buf; |
| 2671 | int bufsize; |
| 2672 | int valsize; |
| 2673 | Lisp_Object val; |
| 2674 | |
| 2675 | filename = ENCODE_FILE (filename); |
| 2676 | |
| 2677 | bufsize = 50; |
| 2678 | buf = NULL; |
| 2679 | do |
| 2680 | { |
| 2681 | bufsize *= 2; |
| 2682 | buf = (char *) xrealloc (buf, bufsize); |
| 2683 | bzero (buf, bufsize); |
| 2684 | |
| 2685 | errno = 0; |
| 2686 | valsize = readlink (SDATA (filename), buf, bufsize); |
| 2687 | if (valsize == -1) |
| 2688 | { |
| 2689 | #ifdef ERANGE |
| 2690 | /* HP-UX reports ERANGE if buffer is too small. */ |
| 2691 | if (errno == ERANGE) |
| 2692 | valsize = bufsize; |
| 2693 | else |
| 2694 | #endif |
| 2695 | { |
| 2696 | xfree (buf); |
| 2697 | return Qnil; |
| 2698 | } |
| 2699 | } |
| 2700 | } |
| 2701 | while (valsize >= bufsize); |
| 2702 | |
| 2703 | val = make_string (buf, valsize); |
| 2704 | if (buf[0] == '/' && index (buf, ':')) |
| 2705 | val = concat2 (build_string ("/:"), val); |
| 2706 | xfree (buf); |
| 2707 | val = DECODE_FILE (val); |
| 2708 | return val; |
| 2709 | } |
| 2710 | #else /* not S_IFLNK */ |
| 2711 | return Qnil; |
| 2712 | #endif /* not S_IFLNK */ |
| 2713 | } |
| 2714 | |
| 2715 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
| 2716 | doc: /* Return t if FILENAME names an existing directory. |
| 2717 | Symbolic links to directories count as directories. |
| 2718 | See `file-symlink-p' to distinguish symlinks. */) |
| 2719 | (filename) |
| 2720 | Lisp_Object filename; |
| 2721 | { |
| 2722 | register Lisp_Object absname; |
| 2723 | struct stat st; |
| 2724 | Lisp_Object handler; |
| 2725 | |
| 2726 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2727 | |
| 2728 | /* If the file name has special constructs in it, |
| 2729 | call the corresponding file handler. */ |
| 2730 | handler = Ffind_file_name_handler (absname, Qfile_directory_p); |
| 2731 | if (!NILP (handler)) |
| 2732 | return call2 (handler, Qfile_directory_p, absname); |
| 2733 | |
| 2734 | absname = ENCODE_FILE (absname); |
| 2735 | |
| 2736 | if (stat (SDATA (absname), &st) < 0) |
| 2737 | return Qnil; |
| 2738 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; |
| 2739 | } |
| 2740 | |
| 2741 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
| 2742 | doc: /* Return t if file FILENAME names a directory you can open. |
| 2743 | For the value to be t, FILENAME must specify the name of a directory as a file, |
| 2744 | and the directory must allow you to open files in it. In order to use a |
| 2745 | directory as a buffer's current directory, this predicate must return true. |
| 2746 | A directory name spec may be given instead; then the value is t |
| 2747 | if the directory so specified exists and really is a readable and |
| 2748 | searchable directory. */) |
| 2749 | (filename) |
| 2750 | Lisp_Object filename; |
| 2751 | { |
| 2752 | Lisp_Object handler; |
| 2753 | int tem; |
| 2754 | struct gcpro gcpro1; |
| 2755 | |
| 2756 | /* If the file name has special constructs in it, |
| 2757 | call the corresponding file handler. */ |
| 2758 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
| 2759 | if (!NILP (handler)) |
| 2760 | return call2 (handler, Qfile_accessible_directory_p, filename); |
| 2761 | |
| 2762 | GCPRO1 (filename); |
| 2763 | tem = (NILP (Ffile_directory_p (filename)) |
| 2764 | || NILP (Ffile_executable_p (filename))); |
| 2765 | UNGCPRO; |
| 2766 | return tem ? Qnil : Qt; |
| 2767 | } |
| 2768 | |
| 2769 | DEFUN ("file-regular-p", Ffile_regular_p, Sfile_regular_p, 1, 1, 0, |
| 2770 | doc: /* Return t if FILENAME names a regular file. |
| 2771 | This is the sort of file that holds an ordinary stream of data bytes. |
| 2772 | Symbolic links to regular files count as regular files. |
| 2773 | See `file-symlink-p' to distinguish symlinks. */) |
| 2774 | (filename) |
| 2775 | Lisp_Object filename; |
| 2776 | { |
| 2777 | register Lisp_Object absname; |
| 2778 | struct stat st; |
| 2779 | Lisp_Object handler; |
| 2780 | |
| 2781 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2782 | |
| 2783 | /* If the file name has special constructs in it, |
| 2784 | call the corresponding file handler. */ |
| 2785 | handler = Ffind_file_name_handler (absname, Qfile_regular_p); |
| 2786 | if (!NILP (handler)) |
| 2787 | return call2 (handler, Qfile_regular_p, absname); |
| 2788 | |
| 2789 | absname = ENCODE_FILE (absname); |
| 2790 | |
| 2791 | #ifdef WINDOWSNT |
| 2792 | { |
| 2793 | int result; |
| 2794 | Lisp_Object tem = Vw32_get_true_file_attributes; |
| 2795 | |
| 2796 | /* Tell stat to use expensive method to get accurate info. */ |
| 2797 | Vw32_get_true_file_attributes = Qt; |
| 2798 | result = stat (SDATA (absname), &st); |
| 2799 | Vw32_get_true_file_attributes = tem; |
| 2800 | |
| 2801 | if (result < 0) |
| 2802 | return Qnil; |
| 2803 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; |
| 2804 | } |
| 2805 | #else |
| 2806 | if (stat (SDATA (absname), &st) < 0) |
| 2807 | return Qnil; |
| 2808 | return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; |
| 2809 | #endif |
| 2810 | } |
| 2811 | \f |
| 2812 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
| 2813 | doc: /* Return mode bits of file named FILENAME, as an integer. |
| 2814 | Return nil, if file does not exist or is not accessible. */) |
| 2815 | (filename) |
| 2816 | Lisp_Object filename; |
| 2817 | { |
| 2818 | Lisp_Object absname; |
| 2819 | struct stat st; |
| 2820 | Lisp_Object handler; |
| 2821 | |
| 2822 | absname = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2823 | |
| 2824 | /* If the file name has special constructs in it, |
| 2825 | call the corresponding file handler. */ |
| 2826 | handler = Ffind_file_name_handler (absname, Qfile_modes); |
| 2827 | if (!NILP (handler)) |
| 2828 | return call2 (handler, Qfile_modes, absname); |
| 2829 | |
| 2830 | absname = ENCODE_FILE (absname); |
| 2831 | |
| 2832 | if (stat (SDATA (absname), &st) < 0) |
| 2833 | return Qnil; |
| 2834 | #if defined (MSDOS) && __DJGPP__ < 2 |
| 2835 | if (check_executable (SDATA (absname))) |
| 2836 | st.st_mode |= S_IEXEC; |
| 2837 | #endif /* MSDOS && __DJGPP__ < 2 */ |
| 2838 | |
| 2839 | return make_number (st.st_mode & 07777); |
| 2840 | } |
| 2841 | |
| 2842 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, |
| 2843 | "(let ((file (read-file-name \"File: \"))) \ |
| 2844 | (list file (read-file-modes nil file)))", |
| 2845 | doc: /* Set mode bits of file named FILENAME to MODE (an integer). |
| 2846 | Only the 12 low bits of MODE are used. |
| 2847 | |
| 2848 | Interactively, mode bits are read by `read-file-modes', which accepts |
| 2849 | symbolic notation, like the `chmod' command from GNU Coreutils. */) |
| 2850 | (filename, mode) |
| 2851 | Lisp_Object filename, mode; |
| 2852 | { |
| 2853 | Lisp_Object absname, encoded_absname; |
| 2854 | Lisp_Object handler; |
| 2855 | |
| 2856 | absname = Fexpand_file_name (filename, current_buffer->directory); |
| 2857 | CHECK_NUMBER (mode); |
| 2858 | |
| 2859 | /* If the file name has special constructs in it, |
| 2860 | call the corresponding file handler. */ |
| 2861 | handler = Ffind_file_name_handler (absname, Qset_file_modes); |
| 2862 | if (!NILP (handler)) |
| 2863 | return call3 (handler, Qset_file_modes, absname, mode); |
| 2864 | |
| 2865 | encoded_absname = ENCODE_FILE (absname); |
| 2866 | |
| 2867 | if (chmod (SDATA (encoded_absname), XINT (mode)) < 0) |
| 2868 | report_file_error ("Doing chmod", Fcons (absname, Qnil)); |
| 2869 | |
| 2870 | return Qnil; |
| 2871 | } |
| 2872 | |
| 2873 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
| 2874 | doc: /* Set the file permission bits for newly created files. |
| 2875 | The argument MODE should be an integer; only the low 9 bits are used. |
| 2876 | This setting is inherited by subprocesses. */) |
| 2877 | (mode) |
| 2878 | Lisp_Object mode; |
| 2879 | { |
| 2880 | CHECK_NUMBER (mode); |
| 2881 | |
| 2882 | umask ((~ XINT (mode)) & 0777); |
| 2883 | |
| 2884 | return Qnil; |
| 2885 | } |
| 2886 | |
| 2887 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
| 2888 | doc: /* Return the default file protection for created files. |
| 2889 | The value is an integer. */) |
| 2890 | () |
| 2891 | { |
| 2892 | int realmask; |
| 2893 | Lisp_Object value; |
| 2894 | |
| 2895 | realmask = umask (0); |
| 2896 | umask (realmask); |
| 2897 | |
| 2898 | XSETINT (value, (~ realmask) & 0777); |
| 2899 | return value; |
| 2900 | } |
| 2901 | \f |
| 2902 | extern int lisp_time_argument P_ ((Lisp_Object, time_t *, int *)); |
| 2903 | |
| 2904 | DEFUN ("set-file-times", Fset_file_times, Sset_file_times, 1, 2, 0, |
| 2905 | doc: /* Set times of file FILENAME to TIME. |
| 2906 | Set both access and modification times. |
| 2907 | Return t on success, else nil. |
| 2908 | Use the current time if TIME is nil. TIME is in the format of |
| 2909 | `current-time'. */) |
| 2910 | (filename, time) |
| 2911 | Lisp_Object filename, time; |
| 2912 | { |
| 2913 | Lisp_Object absname, encoded_absname; |
| 2914 | Lisp_Object handler; |
| 2915 | time_t sec; |
| 2916 | int usec; |
| 2917 | |
| 2918 | if (! lisp_time_argument (time, &sec, &usec)) |
| 2919 | error ("Invalid time specification"); |
| 2920 | |
| 2921 | absname = Fexpand_file_name (filename, current_buffer->directory); |
| 2922 | |
| 2923 | /* If the file name has special constructs in it, |
| 2924 | call the corresponding file handler. */ |
| 2925 | handler = Ffind_file_name_handler (absname, Qset_file_times); |
| 2926 | if (!NILP (handler)) |
| 2927 | return call3 (handler, Qset_file_times, absname, time); |
| 2928 | |
| 2929 | encoded_absname = ENCODE_FILE (absname); |
| 2930 | |
| 2931 | { |
| 2932 | EMACS_TIME t; |
| 2933 | |
| 2934 | EMACS_SET_SECS (t, sec); |
| 2935 | EMACS_SET_USECS (t, usec); |
| 2936 | |
| 2937 | if (set_file_times (SDATA (encoded_absname), t, t)) |
| 2938 | { |
| 2939 | #ifdef DOS_NT |
| 2940 | struct stat st; |
| 2941 | |
| 2942 | /* Setting times on a directory always fails. */ |
| 2943 | if (stat (SDATA (encoded_absname), &st) == 0 |
| 2944 | && (st.st_mode & S_IFMT) == S_IFDIR) |
| 2945 | return Qnil; |
| 2946 | #endif |
| 2947 | report_file_error ("Setting file times", Fcons (absname, Qnil)); |
| 2948 | return Qnil; |
| 2949 | } |
| 2950 | } |
| 2951 | |
| 2952 | return Qt; |
| 2953 | } |
| 2954 | \f |
| 2955 | #ifdef HAVE_SYNC |
| 2956 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
| 2957 | doc: /* Tell Unix to finish all pending disk updates. */) |
| 2958 | () |
| 2959 | { |
| 2960 | sync (); |
| 2961 | return Qnil; |
| 2962 | } |
| 2963 | |
| 2964 | #endif /* HAVE_SYNC */ |
| 2965 | |
| 2966 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
| 2967 | doc: /* Return t if file FILE1 is newer than file FILE2. |
| 2968 | If FILE1 does not exist, the answer is nil; |
| 2969 | otherwise, if FILE2 does not exist, the answer is t. */) |
| 2970 | (file1, file2) |
| 2971 | Lisp_Object file1, file2; |
| 2972 | { |
| 2973 | Lisp_Object absname1, absname2; |
| 2974 | struct stat st; |
| 2975 | int mtime1; |
| 2976 | Lisp_Object handler; |
| 2977 | struct gcpro gcpro1, gcpro2; |
| 2978 | |
| 2979 | CHECK_STRING (file1); |
| 2980 | CHECK_STRING (file2); |
| 2981 | |
| 2982 | absname1 = Qnil; |
| 2983 | GCPRO2 (absname1, file2); |
| 2984 | absname1 = expand_and_dir_to_file (file1, current_buffer->directory); |
| 2985 | absname2 = expand_and_dir_to_file (file2, current_buffer->directory); |
| 2986 | UNGCPRO; |
| 2987 | |
| 2988 | /* If the file name has special constructs in it, |
| 2989 | call the corresponding file handler. */ |
| 2990 | handler = Ffind_file_name_handler (absname1, Qfile_newer_than_file_p); |
| 2991 | if (NILP (handler)) |
| 2992 | handler = Ffind_file_name_handler (absname2, Qfile_newer_than_file_p); |
| 2993 | if (!NILP (handler)) |
| 2994 | return call3 (handler, Qfile_newer_than_file_p, absname1, absname2); |
| 2995 | |
| 2996 | GCPRO2 (absname1, absname2); |
| 2997 | absname1 = ENCODE_FILE (absname1); |
| 2998 | absname2 = ENCODE_FILE (absname2); |
| 2999 | UNGCPRO; |
| 3000 | |
| 3001 | if (stat (SDATA (absname1), &st) < 0) |
| 3002 | return Qnil; |
| 3003 | |
| 3004 | mtime1 = st.st_mtime; |
| 3005 | |
| 3006 | if (stat (SDATA (absname2), &st) < 0) |
| 3007 | return Qt; |
| 3008 | |
| 3009 | return (mtime1 > st.st_mtime) ? Qt : Qnil; |
| 3010 | } |
| 3011 | \f |
| 3012 | #ifdef DOS_NT |
| 3013 | Lisp_Object Qfind_buffer_file_type; |
| 3014 | #endif /* DOS_NT */ |
| 3015 | |
| 3016 | #ifndef READ_BUF_SIZE |
| 3017 | #define READ_BUF_SIZE (64 << 10) |
| 3018 | #endif |
| 3019 | |
| 3020 | extern void adjust_markers_for_delete P_ ((int, int, int, int)); |
| 3021 | |
| 3022 | /* This function is called after Lisp functions to decide a coding |
| 3023 | system are called, or when they cause an error. Before they are |
| 3024 | called, the current buffer is set unibyte and it contains only a |
| 3025 | newly inserted text (thus the buffer was empty before the |
| 3026 | insertion). |
| 3027 | |
| 3028 | The functions may set markers, overlays, text properties, or even |
| 3029 | alter the buffer contents, change the current buffer. |
| 3030 | |
| 3031 | Here, we reset all those changes by: |
| 3032 | o set back the current buffer. |
| 3033 | o move all markers and overlays to BEG. |
| 3034 | o remove all text properties. |
| 3035 | o set back the buffer multibyteness. */ |
| 3036 | |
| 3037 | static Lisp_Object |
| 3038 | decide_coding_unwind (unwind_data) |
| 3039 | Lisp_Object unwind_data; |
| 3040 | { |
| 3041 | Lisp_Object multibyte, undo_list, buffer; |
| 3042 | |
| 3043 | multibyte = XCAR (unwind_data); |
| 3044 | unwind_data = XCDR (unwind_data); |
| 3045 | undo_list = XCAR (unwind_data); |
| 3046 | buffer = XCDR (unwind_data); |
| 3047 | |
| 3048 | if (current_buffer != XBUFFER (buffer)) |
| 3049 | set_buffer_internal (XBUFFER (buffer)); |
| 3050 | adjust_markers_for_delete (BEG, BEG_BYTE, Z, Z_BYTE); |
| 3051 | adjust_overlays_for_delete (BEG, Z - BEG); |
| 3052 | BUF_INTERVALS (current_buffer) = 0; |
| 3053 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
| 3054 | |
| 3055 | /* Now we are safe to change the buffer's multibyteness directly. */ |
| 3056 | current_buffer->enable_multibyte_characters = multibyte; |
| 3057 | current_buffer->undo_list = undo_list; |
| 3058 | |
| 3059 | return Qnil; |
| 3060 | } |
| 3061 | |
| 3062 | |
| 3063 | /* Used to pass values from insert-file-contents to read_non_regular. */ |
| 3064 | |
| 3065 | static int non_regular_fd; |
| 3066 | static int non_regular_inserted; |
| 3067 | static int non_regular_nbytes; |
| 3068 | |
| 3069 | |
| 3070 | /* Read from a non-regular file. |
| 3071 | Read non_regular_trytry bytes max from non_regular_fd. |
| 3072 | Non_regular_inserted specifies where to put the read bytes. |
| 3073 | Value is the number of bytes read. */ |
| 3074 | |
| 3075 | static Lisp_Object |
| 3076 | read_non_regular () |
| 3077 | { |
| 3078 | int nbytes; |
| 3079 | |
| 3080 | immediate_quit = 1; |
| 3081 | QUIT; |
| 3082 | nbytes = emacs_read (non_regular_fd, |
| 3083 | BEG_ADDR + PT_BYTE - BEG_BYTE + non_regular_inserted, |
| 3084 | non_regular_nbytes); |
| 3085 | immediate_quit = 0; |
| 3086 | return make_number (nbytes); |
| 3087 | } |
| 3088 | |
| 3089 | |
| 3090 | /* Condition-case handler used when reading from non-regular files |
| 3091 | in insert-file-contents. */ |
| 3092 | |
| 3093 | static Lisp_Object |
| 3094 | read_non_regular_quit () |
| 3095 | { |
| 3096 | return Qnil; |
| 3097 | } |
| 3098 | |
| 3099 | |
| 3100 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
| 3101 | 1, 5, 0, |
| 3102 | doc: /* Insert contents of file FILENAME after point. |
| 3103 | Returns list of absolute file name and number of characters inserted. |
| 3104 | If second argument VISIT is non-nil, the buffer's visited filename and |
| 3105 | last save file modtime are set, and it is marked unmodified. If |
| 3106 | visiting and the file does not exist, visiting is completed before the |
| 3107 | error is signaled. |
| 3108 | |
| 3109 | The optional third and fourth arguments BEG and END specify what portion |
| 3110 | of the file to insert. These arguments count bytes in the file, not |
| 3111 | characters in the buffer. If VISIT is non-nil, BEG and END must be nil. |
| 3112 | |
| 3113 | If optional fifth argument REPLACE is non-nil, replace the current |
| 3114 | buffer contents (in the accessible portion) with the file contents. |
| 3115 | This is better than simply deleting and inserting the whole thing |
| 3116 | because (1) it preserves some marker positions and (2) it puts less data |
| 3117 | in the undo list. When REPLACE is non-nil, the second return value is |
| 3118 | the number of characters that replace previous buffer contents. |
| 3119 | |
| 3120 | This function does code conversion according to the value of |
| 3121 | `coding-system-for-read' or `file-coding-system-alist', and sets the |
| 3122 | variable `last-coding-system-used' to the coding system actually used. */) |
| 3123 | (filename, visit, beg, end, replace) |
| 3124 | Lisp_Object filename, visit, beg, end, replace; |
| 3125 | { |
| 3126 | struct stat st; |
| 3127 | register int fd; |
| 3128 | int inserted = 0; |
| 3129 | int nochange = 0; |
| 3130 | register int how_much; |
| 3131 | register int unprocessed; |
| 3132 | int count = SPECPDL_INDEX (); |
| 3133 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3134 | Lisp_Object handler, val, insval, orig_filename, old_undo; |
| 3135 | Lisp_Object p; |
| 3136 | int total = 0; |
| 3137 | int not_regular = 0; |
| 3138 | unsigned char read_buf[READ_BUF_SIZE]; |
| 3139 | struct coding_system coding; |
| 3140 | unsigned char buffer[1 << 14]; |
| 3141 | int replace_handled = 0; |
| 3142 | int set_coding_system = 0; |
| 3143 | Lisp_Object coding_system; |
| 3144 | int read_quit = 0; |
| 3145 | Lisp_Object old_Vdeactivate_mark = Vdeactivate_mark; |
| 3146 | int we_locked_file = 0; |
| 3147 | |
| 3148 | if (current_buffer->base_buffer && ! NILP (visit)) |
| 3149 | error ("Cannot do file visiting in an indirect buffer"); |
| 3150 | |
| 3151 | if (!NILP (current_buffer->read_only)) |
| 3152 | Fbarf_if_buffer_read_only (); |
| 3153 | |
| 3154 | val = Qnil; |
| 3155 | p = Qnil; |
| 3156 | orig_filename = Qnil; |
| 3157 | old_undo = Qnil; |
| 3158 | |
| 3159 | GCPRO5 (filename, val, p, orig_filename, old_undo); |
| 3160 | |
| 3161 | CHECK_STRING (filename); |
| 3162 | filename = Fexpand_file_name (filename, Qnil); |
| 3163 | |
| 3164 | /* The value Qnil means that the coding system is not yet |
| 3165 | decided. */ |
| 3166 | coding_system = Qnil; |
| 3167 | |
| 3168 | /* If the file name has special constructs in it, |
| 3169 | call the corresponding file handler. */ |
| 3170 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
| 3171 | if (!NILP (handler)) |
| 3172 | { |
| 3173 | val = call6 (handler, Qinsert_file_contents, filename, |
| 3174 | visit, beg, end, replace); |
| 3175 | if (CONSP (val) && CONSP (XCDR (val))) |
| 3176 | inserted = XINT (XCAR (XCDR (val))); |
| 3177 | goto handled; |
| 3178 | } |
| 3179 | |
| 3180 | orig_filename = filename; |
| 3181 | filename = ENCODE_FILE (filename); |
| 3182 | |
| 3183 | fd = -1; |
| 3184 | |
| 3185 | #ifdef WINDOWSNT |
| 3186 | { |
| 3187 | Lisp_Object tem = Vw32_get_true_file_attributes; |
| 3188 | |
| 3189 | /* Tell stat to use expensive method to get accurate info. */ |
| 3190 | Vw32_get_true_file_attributes = Qt; |
| 3191 | total = stat (SDATA (filename), &st); |
| 3192 | Vw32_get_true_file_attributes = tem; |
| 3193 | } |
| 3194 | if (total < 0) |
| 3195 | #else |
| 3196 | if (stat (SDATA (filename), &st) < 0) |
| 3197 | #endif /* WINDOWSNT */ |
| 3198 | { |
| 3199 | if (fd >= 0) emacs_close (fd); |
| 3200 | badopen: |
| 3201 | if (NILP (visit)) |
| 3202 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
| 3203 | st.st_mtime = -1; |
| 3204 | how_much = 0; |
| 3205 | if (!NILP (Vcoding_system_for_read)) |
| 3206 | Fset (Qbuffer_file_coding_system, Vcoding_system_for_read); |
| 3207 | goto notfound; |
| 3208 | } |
| 3209 | |
| 3210 | #ifdef S_IFREG |
| 3211 | /* This code will need to be changed in order to work on named |
| 3212 | pipes, and it's probably just not worth it. So we should at |
| 3213 | least signal an error. */ |
| 3214 | if (!S_ISREG (st.st_mode)) |
| 3215 | { |
| 3216 | not_regular = 1; |
| 3217 | |
| 3218 | if (! NILP (visit)) |
| 3219 | goto notfound; |
| 3220 | |
| 3221 | if (! NILP (replace) || ! NILP (beg) || ! NILP (end)) |
| 3222 | xsignal2 (Qfile_error, |
| 3223 | build_string ("not a regular file"), orig_filename); |
| 3224 | } |
| 3225 | #endif |
| 3226 | |
| 3227 | if (fd < 0) |
| 3228 | if ((fd = emacs_open (SDATA (filename), O_RDONLY, 0)) < 0) |
| 3229 | goto badopen; |
| 3230 | |
| 3231 | /* Replacement should preserve point as it preserves markers. */ |
| 3232 | if (!NILP (replace)) |
| 3233 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); |
| 3234 | |
| 3235 | record_unwind_protect (close_file_unwind, make_number (fd)); |
| 3236 | |
| 3237 | /* Can happen on any platform that uses long as type of off_t, but allows |
| 3238 | file sizes to exceed 2Gb, so give a suitable message. */ |
| 3239 | if (! not_regular && st.st_size < 0) |
| 3240 | error ("Maximum buffer size exceeded"); |
| 3241 | |
| 3242 | /* Prevent redisplay optimizations. */ |
| 3243 | current_buffer->clip_changed = 1; |
| 3244 | |
| 3245 | if (!NILP (visit)) |
| 3246 | { |
| 3247 | if (!NILP (beg) || !NILP (end)) |
| 3248 | error ("Attempt to visit less than an entire file"); |
| 3249 | if (BEG < Z && NILP (replace)) |
| 3250 | error ("Cannot do file visiting in a non-empty buffer"); |
| 3251 | } |
| 3252 | |
| 3253 | if (!NILP (beg)) |
| 3254 | CHECK_NUMBER (beg); |
| 3255 | else |
| 3256 | XSETFASTINT (beg, 0); |
| 3257 | |
| 3258 | if (!NILP (end)) |
| 3259 | CHECK_NUMBER (end); |
| 3260 | else |
| 3261 | { |
| 3262 | if (! not_regular) |
| 3263 | { |
| 3264 | XSETINT (end, st.st_size); |
| 3265 | |
| 3266 | /* Arithmetic overflow can occur if an Emacs integer cannot |
| 3267 | represent the file size, or if the calculations below |
| 3268 | overflow. The calculations below double the file size |
| 3269 | twice, so check that it can be multiplied by 4 safely. */ |
| 3270 | if (XINT (end) != st.st_size |
| 3271 | || st.st_size > INT_MAX / 4) |
| 3272 | error ("Maximum buffer size exceeded"); |
| 3273 | |
| 3274 | /* The file size returned from stat may be zero, but data |
| 3275 | may be readable nonetheless, for example when this is a |
| 3276 | file in the /proc filesystem. */ |
| 3277 | if (st.st_size == 0) |
| 3278 | XSETINT (end, READ_BUF_SIZE); |
| 3279 | } |
| 3280 | } |
| 3281 | |
| 3282 | if (EQ (Vcoding_system_for_read, Qauto_save_coding)) |
| 3283 | { |
| 3284 | coding_system = coding_inherit_eol_type (Qutf_8_emacs, Qunix); |
| 3285 | setup_coding_system (coding_system, &coding); |
| 3286 | /* Ensure we set Vlast_coding_system_used. */ |
| 3287 | set_coding_system = 1; |
| 3288 | } |
| 3289 | else if (BEG < Z) |
| 3290 | { |
| 3291 | /* Decide the coding system to use for reading the file now |
| 3292 | because we can't use an optimized method for handling |
| 3293 | `coding:' tag if the current buffer is not empty. */ |
| 3294 | if (!NILP (Vcoding_system_for_read)) |
| 3295 | coding_system = Vcoding_system_for_read; |
| 3296 | else |
| 3297 | { |
| 3298 | /* Don't try looking inside a file for a coding system |
| 3299 | specification if it is not seekable. */ |
| 3300 | if (! not_regular && ! NILP (Vset_auto_coding_function)) |
| 3301 | { |
| 3302 | /* Find a coding system specified in the heading two |
| 3303 | lines or in the tailing several lines of the file. |
| 3304 | We assume that the 1K-byte and 3K-byte for heading |
| 3305 | and tailing respectively are sufficient for this |
| 3306 | purpose. */ |
| 3307 | int nread; |
| 3308 | |
| 3309 | if (st.st_size <= (1024 * 4)) |
| 3310 | nread = emacs_read (fd, read_buf, 1024 * 4); |
| 3311 | else |
| 3312 | { |
| 3313 | nread = emacs_read (fd, read_buf, 1024); |
| 3314 | if (nread >= 0) |
| 3315 | { |
| 3316 | if (lseek (fd, st.st_size - (1024 * 3), 0) < 0) |
| 3317 | report_file_error ("Setting file position", |
| 3318 | Fcons (orig_filename, Qnil)); |
| 3319 | nread += emacs_read (fd, read_buf + nread, 1024 * 3); |
| 3320 | } |
| 3321 | } |
| 3322 | |
| 3323 | if (nread < 0) |
| 3324 | error ("IO error reading %s: %s", |
| 3325 | SDATA (orig_filename), emacs_strerror (errno)); |
| 3326 | else if (nread > 0) |
| 3327 | { |
| 3328 | struct buffer *prev = current_buffer; |
| 3329 | Lisp_Object buffer; |
| 3330 | struct buffer *buf; |
| 3331 | |
| 3332 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
| 3333 | |
| 3334 | buffer = Fget_buffer_create (build_string (" *code-converting-work*")); |
| 3335 | buf = XBUFFER (buffer); |
| 3336 | |
| 3337 | delete_all_overlays (buf); |
| 3338 | buf->directory = current_buffer->directory; |
| 3339 | buf->read_only = Qnil; |
| 3340 | buf->filename = Qnil; |
| 3341 | buf->undo_list = Qt; |
| 3342 | eassert (buf->overlays_before == NULL); |
| 3343 | eassert (buf->overlays_after == NULL); |
| 3344 | |
| 3345 | set_buffer_internal (buf); |
| 3346 | Ferase_buffer (); |
| 3347 | buf->enable_multibyte_characters = Qnil; |
| 3348 | |
| 3349 | insert_1_both (read_buf, nread, nread, 0, 0, 0); |
| 3350 | TEMP_SET_PT_BOTH (BEG, BEG_BYTE); |
| 3351 | coding_system = call2 (Vset_auto_coding_function, |
| 3352 | filename, make_number (nread)); |
| 3353 | set_buffer_internal (prev); |
| 3354 | |
| 3355 | /* Discard the unwind protect for recovering the |
| 3356 | current buffer. */ |
| 3357 | specpdl_ptr--; |
| 3358 | |
| 3359 | /* Rewind the file for the actual read done later. */ |
| 3360 | if (lseek (fd, 0, 0) < 0) |
| 3361 | report_file_error ("Setting file position", |
| 3362 | Fcons (orig_filename, Qnil)); |
| 3363 | } |
| 3364 | } |
| 3365 | |
| 3366 | if (NILP (coding_system)) |
| 3367 | { |
| 3368 | /* If we have not yet decided a coding system, check |
| 3369 | file-coding-system-alist. */ |
| 3370 | Lisp_Object args[6]; |
| 3371 | |
| 3372 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
| 3373 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace; |
| 3374 | coding_system = Ffind_operation_coding_system (6, args); |
| 3375 | if (CONSP (coding_system)) |
| 3376 | coding_system = XCAR (coding_system); |
| 3377 | } |
| 3378 | } |
| 3379 | |
| 3380 | if (NILP (coding_system)) |
| 3381 | coding_system = Qundecided; |
| 3382 | else |
| 3383 | CHECK_CODING_SYSTEM (coding_system); |
| 3384 | |
| 3385 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 3386 | /* We must suppress all character code conversion except for |
| 3387 | end-of-line conversion. */ |
| 3388 | coding_system = raw_text_coding_system (coding_system); |
| 3389 | |
| 3390 | setup_coding_system (coding_system, &coding); |
| 3391 | /* Ensure we set Vlast_coding_system_used. */ |
| 3392 | set_coding_system = 1; |
| 3393 | } |
| 3394 | |
| 3395 | /* If requested, replace the accessible part of the buffer |
| 3396 | with the file contents. Avoid replacing text at the |
| 3397 | beginning or end of the buffer that matches the file contents; |
| 3398 | that preserves markers pointing to the unchanged parts. |
| 3399 | |
| 3400 | Here we implement this feature in an optimized way |
| 3401 | for the case where code conversion is NOT needed. |
| 3402 | The following if-statement handles the case of conversion |
| 3403 | in a less optimal way. |
| 3404 | |
| 3405 | If the code conversion is "automatic" then we try using this |
| 3406 | method and hope for the best. |
| 3407 | But if we discover the need for conversion, we give up on this method |
| 3408 | and let the following if-statement handle the replace job. */ |
| 3409 | if (!NILP (replace) |
| 3410 | && BEGV < ZV |
| 3411 | && (NILP (coding_system) |
| 3412 | || ! CODING_REQUIRE_DECODING (&coding))) |
| 3413 | { |
| 3414 | /* same_at_start and same_at_end count bytes, |
| 3415 | because file access counts bytes |
| 3416 | and BEG and END count bytes. */ |
| 3417 | int same_at_start = BEGV_BYTE; |
| 3418 | int same_at_end = ZV_BYTE; |
| 3419 | int overlap; |
| 3420 | /* There is still a possibility we will find the need to do code |
| 3421 | conversion. If that happens, we set this variable to 1 to |
| 3422 | give up on handling REPLACE in the optimized way. */ |
| 3423 | int giveup_match_end = 0; |
| 3424 | |
| 3425 | if (XINT (beg) != 0) |
| 3426 | { |
| 3427 | if (lseek (fd, XINT (beg), 0) < 0) |
| 3428 | report_file_error ("Setting file position", |
| 3429 | Fcons (orig_filename, Qnil)); |
| 3430 | } |
| 3431 | |
| 3432 | immediate_quit = 1; |
| 3433 | QUIT; |
| 3434 | /* Count how many chars at the start of the file |
| 3435 | match the text at the beginning of the buffer. */ |
| 3436 | while (1) |
| 3437 | { |
| 3438 | int nread, bufpos; |
| 3439 | |
| 3440 | nread = emacs_read (fd, buffer, sizeof buffer); |
| 3441 | if (nread < 0) |
| 3442 | error ("IO error reading %s: %s", |
| 3443 | SDATA (orig_filename), emacs_strerror (errno)); |
| 3444 | else if (nread == 0) |
| 3445 | break; |
| 3446 | |
| 3447 | if (CODING_REQUIRE_DETECTION (&coding)) |
| 3448 | { |
| 3449 | coding_system = detect_coding_system (buffer, nread, nread, 1, 0, |
| 3450 | coding_system); |
| 3451 | setup_coding_system (coding_system, &coding); |
| 3452 | } |
| 3453 | |
| 3454 | if (CODING_REQUIRE_DECODING (&coding)) |
| 3455 | /* We found that the file should be decoded somehow. |
| 3456 | Let's give up here. */ |
| 3457 | { |
| 3458 | giveup_match_end = 1; |
| 3459 | break; |
| 3460 | } |
| 3461 | |
| 3462 | bufpos = 0; |
| 3463 | while (bufpos < nread && same_at_start < ZV_BYTE |
| 3464 | && FETCH_BYTE (same_at_start) == buffer[bufpos]) |
| 3465 | same_at_start++, bufpos++; |
| 3466 | /* If we found a discrepancy, stop the scan. |
| 3467 | Otherwise loop around and scan the next bufferful. */ |
| 3468 | if (bufpos != nread) |
| 3469 | break; |
| 3470 | } |
| 3471 | immediate_quit = 0; |
| 3472 | /* If the file matches the buffer completely, |
| 3473 | there's no need to replace anything. */ |
| 3474 | if (same_at_start - BEGV_BYTE == XINT (end)) |
| 3475 | { |
| 3476 | emacs_close (fd); |
| 3477 | specpdl_ptr--; |
| 3478 | /* Truncate the buffer to the size of the file. */ |
| 3479 | del_range_1 (same_at_start, same_at_end, 0, 0); |
| 3480 | goto handled; |
| 3481 | } |
| 3482 | immediate_quit = 1; |
| 3483 | QUIT; |
| 3484 | /* Count how many chars at the end of the file |
| 3485 | match the text at the end of the buffer. But, if we have |
| 3486 | already found that decoding is necessary, don't waste time. */ |
| 3487 | while (!giveup_match_end) |
| 3488 | { |
| 3489 | int total_read, nread, bufpos, curpos, trial; |
| 3490 | |
| 3491 | /* At what file position are we now scanning? */ |
| 3492 | curpos = XINT (end) - (ZV_BYTE - same_at_end); |
| 3493 | /* If the entire file matches the buffer tail, stop the scan. */ |
| 3494 | if (curpos == 0) |
| 3495 | break; |
| 3496 | /* How much can we scan in the next step? */ |
| 3497 | trial = min (curpos, sizeof buffer); |
| 3498 | if (lseek (fd, curpos - trial, 0) < 0) |
| 3499 | report_file_error ("Setting file position", |
| 3500 | Fcons (orig_filename, Qnil)); |
| 3501 | |
| 3502 | total_read = nread = 0; |
| 3503 | while (total_read < trial) |
| 3504 | { |
| 3505 | nread = emacs_read (fd, buffer + total_read, trial - total_read); |
| 3506 | if (nread < 0) |
| 3507 | error ("IO error reading %s: %s", |
| 3508 | SDATA (orig_filename), emacs_strerror (errno)); |
| 3509 | else if (nread == 0) |
| 3510 | break; |
| 3511 | total_read += nread; |
| 3512 | } |
| 3513 | |
| 3514 | /* Scan this bufferful from the end, comparing with |
| 3515 | the Emacs buffer. */ |
| 3516 | bufpos = total_read; |
| 3517 | |
| 3518 | /* Compare with same_at_start to avoid counting some buffer text |
| 3519 | as matching both at the file's beginning and at the end. */ |
| 3520 | while (bufpos > 0 && same_at_end > same_at_start |
| 3521 | && FETCH_BYTE (same_at_end - 1) == buffer[bufpos - 1]) |
| 3522 | same_at_end--, bufpos--; |
| 3523 | |
| 3524 | /* If we found a discrepancy, stop the scan. |
| 3525 | Otherwise loop around and scan the preceding bufferful. */ |
| 3526 | if (bufpos != 0) |
| 3527 | { |
| 3528 | /* If this discrepancy is because of code conversion, |
| 3529 | we cannot use this method; giveup and try the other. */ |
| 3530 | if (same_at_end > same_at_start |
| 3531 | && FETCH_BYTE (same_at_end - 1) >= 0200 |
| 3532 | && ! NILP (current_buffer->enable_multibyte_characters) |
| 3533 | && (CODING_MAY_REQUIRE_DECODING (&coding))) |
| 3534 | giveup_match_end = 1; |
| 3535 | break; |
| 3536 | } |
| 3537 | |
| 3538 | if (nread == 0) |
| 3539 | break; |
| 3540 | } |
| 3541 | immediate_quit = 0; |
| 3542 | |
| 3543 | if (! giveup_match_end) |
| 3544 | { |
| 3545 | int temp; |
| 3546 | |
| 3547 | /* We win! We can handle REPLACE the optimized way. */ |
| 3548 | |
| 3549 | /* Extend the start of non-matching text area to multibyte |
| 3550 | character boundary. */ |
| 3551 | if (! NILP (current_buffer->enable_multibyte_characters)) |
| 3552 | while (same_at_start > BEGV_BYTE |
| 3553 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) |
| 3554 | same_at_start--; |
| 3555 | |
| 3556 | /* Extend the end of non-matching text area to multibyte |
| 3557 | character boundary. */ |
| 3558 | if (! NILP (current_buffer->enable_multibyte_characters)) |
| 3559 | while (same_at_end < ZV_BYTE |
| 3560 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) |
| 3561 | same_at_end++; |
| 3562 | |
| 3563 | /* Don't try to reuse the same piece of text twice. */ |
| 3564 | overlap = (same_at_start - BEGV_BYTE |
| 3565 | - (same_at_end + st.st_size - ZV)); |
| 3566 | if (overlap > 0) |
| 3567 | same_at_end += overlap; |
| 3568 | |
| 3569 | /* Arrange to read only the nonmatching middle part of the file. */ |
| 3570 | XSETFASTINT (beg, XINT (beg) + (same_at_start - BEGV_BYTE)); |
| 3571 | XSETFASTINT (end, XINT (end) - (ZV_BYTE - same_at_end)); |
| 3572 | |
| 3573 | del_range_byte (same_at_start, same_at_end, 0); |
| 3574 | /* Insert from the file at the proper position. */ |
| 3575 | temp = BYTE_TO_CHAR (same_at_start); |
| 3576 | SET_PT_BOTH (temp, same_at_start); |
| 3577 | |
| 3578 | /* If display currently starts at beginning of line, |
| 3579 | keep it that way. */ |
| 3580 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) |
| 3581 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); |
| 3582 | |
| 3583 | replace_handled = 1; |
| 3584 | } |
| 3585 | } |
| 3586 | |
| 3587 | /* If requested, replace the accessible part of the buffer |
| 3588 | with the file contents. Avoid replacing text at the |
| 3589 | beginning or end of the buffer that matches the file contents; |
| 3590 | that preserves markers pointing to the unchanged parts. |
| 3591 | |
| 3592 | Here we implement this feature for the case where code conversion |
| 3593 | is needed, in a simple way that needs a lot of memory. |
| 3594 | The preceding if-statement handles the case of no conversion |
| 3595 | in a more optimized way. */ |
| 3596 | if (!NILP (replace) && ! replace_handled && BEGV < ZV) |
| 3597 | { |
| 3598 | EMACS_INT same_at_start = BEGV_BYTE; |
| 3599 | EMACS_INT same_at_end = ZV_BYTE; |
| 3600 | EMACS_INT same_at_start_charpos; |
| 3601 | EMACS_INT inserted_chars; |
| 3602 | EMACS_INT overlap; |
| 3603 | EMACS_INT bufpos; |
| 3604 | unsigned char *decoded; |
| 3605 | int temp; |
| 3606 | int this_count = SPECPDL_INDEX (); |
| 3607 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
| 3608 | Lisp_Object conversion_buffer; |
| 3609 | |
| 3610 | conversion_buffer = code_conversion_save (1, multibyte); |
| 3611 | |
| 3612 | /* First read the whole file, performing code conversion into |
| 3613 | CONVERSION_BUFFER. */ |
| 3614 | |
| 3615 | if (lseek (fd, XINT (beg), 0) < 0) |
| 3616 | report_file_error ("Setting file position", |
| 3617 | Fcons (orig_filename, Qnil)); |
| 3618 | |
| 3619 | total = st.st_size; /* Total bytes in the file. */ |
| 3620 | how_much = 0; /* Bytes read from file so far. */ |
| 3621 | inserted = 0; /* Bytes put into CONVERSION_BUFFER so far. */ |
| 3622 | unprocessed = 0; /* Bytes not processed in previous loop. */ |
| 3623 | |
| 3624 | GCPRO1 (conversion_buffer); |
| 3625 | while (how_much < total) |
| 3626 | { |
| 3627 | /* We read one bunch by one (READ_BUF_SIZE bytes) to allow |
| 3628 | quitting while reading a huge while. */ |
| 3629 | /* try is reserved in some compilers (Microsoft C) */ |
| 3630 | int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed); |
| 3631 | int this; |
| 3632 | |
| 3633 | /* Allow quitting out of the actual I/O. */ |
| 3634 | immediate_quit = 1; |
| 3635 | QUIT; |
| 3636 | this = emacs_read (fd, read_buf + unprocessed, trytry); |
| 3637 | immediate_quit = 0; |
| 3638 | |
| 3639 | if (this <= 0) |
| 3640 | { |
| 3641 | if (this < 0) |
| 3642 | how_much = this; |
| 3643 | break; |
| 3644 | } |
| 3645 | |
| 3646 | how_much += this; |
| 3647 | |
| 3648 | BUF_TEMP_SET_PT (XBUFFER (conversion_buffer), |
| 3649 | BUF_Z (XBUFFER (conversion_buffer))); |
| 3650 | decode_coding_c_string (&coding, read_buf, unprocessed + this, |
| 3651 | conversion_buffer); |
| 3652 | unprocessed = coding.carryover_bytes; |
| 3653 | if (coding.carryover_bytes > 0) |
| 3654 | bcopy (coding.carryover, read_buf, unprocessed); |
| 3655 | } |
| 3656 | UNGCPRO; |
| 3657 | emacs_close (fd); |
| 3658 | |
| 3659 | /* At this point, HOW_MUCH should equal TOTAL, or should be <= 0 |
| 3660 | if we couldn't read the file. */ |
| 3661 | |
| 3662 | if (how_much < 0) |
| 3663 | error ("IO error reading %s: %s", |
| 3664 | SDATA (orig_filename), emacs_strerror (errno)); |
| 3665 | |
| 3666 | if (unprocessed > 0) |
| 3667 | { |
| 3668 | coding.mode |= CODING_MODE_LAST_BLOCK; |
| 3669 | decode_coding_c_string (&coding, read_buf, unprocessed, |
| 3670 | conversion_buffer); |
| 3671 | coding.mode &= ~CODING_MODE_LAST_BLOCK; |
| 3672 | } |
| 3673 | |
| 3674 | decoded = BUF_BEG_ADDR (XBUFFER (conversion_buffer)); |
| 3675 | inserted = (BUF_Z_BYTE (XBUFFER (conversion_buffer)) |
| 3676 | - BUF_BEG_BYTE (XBUFFER (conversion_buffer))); |
| 3677 | |
| 3678 | /* Compare the beginning of the converted string with the buffer |
| 3679 | text. */ |
| 3680 | |
| 3681 | bufpos = 0; |
| 3682 | while (bufpos < inserted && same_at_start < same_at_end |
| 3683 | && FETCH_BYTE (same_at_start) == decoded[bufpos]) |
| 3684 | same_at_start++, bufpos++; |
| 3685 | |
| 3686 | /* If the file matches the head of buffer completely, |
| 3687 | there's no need to replace anything. */ |
| 3688 | |
| 3689 | if (bufpos == inserted) |
| 3690 | { |
| 3691 | /* Truncate the buffer to the size of the file. */ |
| 3692 | if (same_at_start == same_at_end) |
| 3693 | nochange = 1; |
| 3694 | else |
| 3695 | del_range_byte (same_at_start, same_at_end, 0); |
| 3696 | inserted = 0; |
| 3697 | |
| 3698 | unbind_to (this_count, Qnil); |
| 3699 | goto handled; |
| 3700 | } |
| 3701 | |
| 3702 | /* Extend the start of non-matching text area to the previous |
| 3703 | multibyte character boundary. */ |
| 3704 | if (! NILP (current_buffer->enable_multibyte_characters)) |
| 3705 | while (same_at_start > BEGV_BYTE |
| 3706 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start))) |
| 3707 | same_at_start--; |
| 3708 | |
| 3709 | /* Scan this bufferful from the end, comparing with |
| 3710 | the Emacs buffer. */ |
| 3711 | bufpos = inserted; |
| 3712 | |
| 3713 | /* Compare with same_at_start to avoid counting some buffer text |
| 3714 | as matching both at the file's beginning and at the end. */ |
| 3715 | while (bufpos > 0 && same_at_end > same_at_start |
| 3716 | && FETCH_BYTE (same_at_end - 1) == decoded[bufpos - 1]) |
| 3717 | same_at_end--, bufpos--; |
| 3718 | |
| 3719 | /* Extend the end of non-matching text area to the next |
| 3720 | multibyte character boundary. */ |
| 3721 | if (! NILP (current_buffer->enable_multibyte_characters)) |
| 3722 | while (same_at_end < ZV_BYTE |
| 3723 | && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end))) |
| 3724 | same_at_end++; |
| 3725 | |
| 3726 | /* Don't try to reuse the same piece of text twice. */ |
| 3727 | overlap = same_at_start - BEGV_BYTE - (same_at_end + inserted - ZV_BYTE); |
| 3728 | if (overlap > 0) |
| 3729 | same_at_end += overlap; |
| 3730 | |
| 3731 | /* If display currently starts at beginning of line, |
| 3732 | keep it that way. */ |
| 3733 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer) |
| 3734 | XWINDOW (selected_window)->start_at_line_beg = Fbolp (); |
| 3735 | |
| 3736 | /* Replace the chars that we need to replace, |
| 3737 | and update INSERTED to equal the number of bytes |
| 3738 | we are taking from the decoded string. */ |
| 3739 | inserted -= (ZV_BYTE - same_at_end) + (same_at_start - BEGV_BYTE); |
| 3740 | |
| 3741 | if (same_at_end != same_at_start) |
| 3742 | { |
| 3743 | del_range_byte (same_at_start, same_at_end, 0); |
| 3744 | temp = GPT; |
| 3745 | same_at_start = GPT_BYTE; |
| 3746 | } |
| 3747 | else |
| 3748 | { |
| 3749 | temp = BYTE_TO_CHAR (same_at_start); |
| 3750 | } |
| 3751 | /* Insert from the file at the proper position. */ |
| 3752 | SET_PT_BOTH (temp, same_at_start); |
| 3753 | same_at_start_charpos |
| 3754 | = buf_bytepos_to_charpos (XBUFFER (conversion_buffer), |
| 3755 | same_at_start - BEGV_BYTE |
| 3756 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))); |
| 3757 | inserted_chars |
| 3758 | = (buf_bytepos_to_charpos (XBUFFER (conversion_buffer), |
| 3759 | same_at_start + inserted - BEGV_BYTE |
| 3760 | + BUF_BEG_BYTE (XBUFFER (conversion_buffer))) |
| 3761 | - same_at_start_charpos); |
| 3762 | /* This binding is to avoid ask-user-about-supersession-threat |
| 3763 | being called in insert_from_buffer (via in |
| 3764 | prepare_to_modify_buffer). */ |
| 3765 | specbind (intern ("buffer-file-name"), Qnil); |
| 3766 | insert_from_buffer (XBUFFER (conversion_buffer), |
| 3767 | same_at_start_charpos, inserted_chars, 0); |
| 3768 | /* Set `inserted' to the number of inserted characters. */ |
| 3769 | inserted = PT - temp; |
| 3770 | /* Set point before the inserted characters. */ |
| 3771 | SET_PT_BOTH (temp, same_at_start); |
| 3772 | |
| 3773 | unbind_to (this_count, Qnil); |
| 3774 | |
| 3775 | goto handled; |
| 3776 | } |
| 3777 | |
| 3778 | if (! not_regular) |
| 3779 | { |
| 3780 | register Lisp_Object temp; |
| 3781 | |
| 3782 | total = XINT (end) - XINT (beg); |
| 3783 | |
| 3784 | /* Make sure point-max won't overflow after this insertion. */ |
| 3785 | XSETINT (temp, total); |
| 3786 | if (total != XINT (temp)) |
| 3787 | error ("Maximum buffer size exceeded"); |
| 3788 | } |
| 3789 | else |
| 3790 | /* For a special file, all we can do is guess. */ |
| 3791 | total = READ_BUF_SIZE; |
| 3792 | |
| 3793 | if (NILP (visit) && inserted > 0) |
| 3794 | { |
| 3795 | #ifdef CLASH_DETECTION |
| 3796 | if (!NILP (current_buffer->file_truename) |
| 3797 | /* Make binding buffer-file-name to nil effective. */ |
| 3798 | && !NILP (current_buffer->filename) |
| 3799 | && SAVE_MODIFF >= MODIFF) |
| 3800 | we_locked_file = 1; |
| 3801 | #endif /* CLASH_DETECTION */ |
| 3802 | prepare_to_modify_buffer (GPT, GPT, NULL); |
| 3803 | } |
| 3804 | |
| 3805 | move_gap (PT); |
| 3806 | if (GAP_SIZE < total) |
| 3807 | make_gap (total - GAP_SIZE); |
| 3808 | |
| 3809 | if (XINT (beg) != 0 || !NILP (replace)) |
| 3810 | { |
| 3811 | if (lseek (fd, XINT (beg), 0) < 0) |
| 3812 | report_file_error ("Setting file position", |
| 3813 | Fcons (orig_filename, Qnil)); |
| 3814 | } |
| 3815 | |
| 3816 | /* In the following loop, HOW_MUCH contains the total bytes read so |
| 3817 | far for a regular file, and not changed for a special file. But, |
| 3818 | before exiting the loop, it is set to a negative value if I/O |
| 3819 | error occurs. */ |
| 3820 | how_much = 0; |
| 3821 | |
| 3822 | /* Total bytes inserted. */ |
| 3823 | inserted = 0; |
| 3824 | |
| 3825 | /* Here, we don't do code conversion in the loop. It is done by |
| 3826 | decode_coding_gap after all data are read into the buffer. */ |
| 3827 | { |
| 3828 | int gap_size = GAP_SIZE; |
| 3829 | |
| 3830 | while (how_much < total) |
| 3831 | { |
| 3832 | /* try is reserved in some compilers (Microsoft C) */ |
| 3833 | int trytry = min (total - how_much, READ_BUF_SIZE); |
| 3834 | int this; |
| 3835 | |
| 3836 | if (not_regular) |
| 3837 | { |
| 3838 | Lisp_Object val; |
| 3839 | |
| 3840 | /* Maybe make more room. */ |
| 3841 | if (gap_size < trytry) |
| 3842 | { |
| 3843 | make_gap (total - gap_size); |
| 3844 | gap_size = GAP_SIZE; |
| 3845 | } |
| 3846 | |
| 3847 | /* Read from the file, capturing `quit'. When an |
| 3848 | error occurs, end the loop, and arrange for a quit |
| 3849 | to be signaled after decoding the text we read. */ |
| 3850 | non_regular_fd = fd; |
| 3851 | non_regular_inserted = inserted; |
| 3852 | non_regular_nbytes = trytry; |
| 3853 | val = internal_condition_case_1 (read_non_regular, Qnil, Qerror, |
| 3854 | read_non_regular_quit); |
| 3855 | if (NILP (val)) |
| 3856 | { |
| 3857 | read_quit = 1; |
| 3858 | break; |
| 3859 | } |
| 3860 | |
| 3861 | this = XINT (val); |
| 3862 | } |
| 3863 | else |
| 3864 | { |
| 3865 | /* Allow quitting out of the actual I/O. We don't make text |
| 3866 | part of the buffer until all the reading is done, so a C-g |
| 3867 | here doesn't do any harm. */ |
| 3868 | immediate_quit = 1; |
| 3869 | QUIT; |
| 3870 | this = emacs_read (fd, BEG_ADDR + PT_BYTE - BEG_BYTE + inserted, trytry); |
| 3871 | immediate_quit = 0; |
| 3872 | } |
| 3873 | |
| 3874 | if (this <= 0) |
| 3875 | { |
| 3876 | how_much = this; |
| 3877 | break; |
| 3878 | } |
| 3879 | |
| 3880 | gap_size -= this; |
| 3881 | |
| 3882 | /* For a regular file, where TOTAL is the real size, |
| 3883 | count HOW_MUCH to compare with it. |
| 3884 | For a special file, where TOTAL is just a buffer size, |
| 3885 | so don't bother counting in HOW_MUCH. |
| 3886 | (INSERTED is where we count the number of characters inserted.) */ |
| 3887 | if (! not_regular) |
| 3888 | how_much += this; |
| 3889 | inserted += this; |
| 3890 | } |
| 3891 | } |
| 3892 | |
| 3893 | /* Now we have read all the file data into the gap. |
| 3894 | If it was empty, undo marking the buffer modified. */ |
| 3895 | |
| 3896 | if (inserted == 0) |
| 3897 | { |
| 3898 | #ifdef CLASH_DETECTION |
| 3899 | if (we_locked_file) |
| 3900 | unlock_file (current_buffer->file_truename); |
| 3901 | #endif |
| 3902 | Vdeactivate_mark = old_Vdeactivate_mark; |
| 3903 | } |
| 3904 | else |
| 3905 | Vdeactivate_mark = Qt; |
| 3906 | |
| 3907 | /* Make the text read part of the buffer. */ |
| 3908 | GAP_SIZE -= inserted; |
| 3909 | GPT += inserted; |
| 3910 | GPT_BYTE += inserted; |
| 3911 | ZV += inserted; |
| 3912 | ZV_BYTE += inserted; |
| 3913 | Z += inserted; |
| 3914 | Z_BYTE += inserted; |
| 3915 | |
| 3916 | if (GAP_SIZE > 0) |
| 3917 | /* Put an anchor to ensure multi-byte form ends at gap. */ |
| 3918 | *GPT_ADDR = 0; |
| 3919 | |
| 3920 | emacs_close (fd); |
| 3921 | |
| 3922 | /* Discard the unwind protect for closing the file. */ |
| 3923 | specpdl_ptr--; |
| 3924 | |
| 3925 | if (how_much < 0) |
| 3926 | error ("IO error reading %s: %s", |
| 3927 | SDATA (orig_filename), emacs_strerror (errno)); |
| 3928 | |
| 3929 | notfound: |
| 3930 | |
| 3931 | if (NILP (coding_system)) |
| 3932 | { |
| 3933 | /* The coding system is not yet decided. Decide it by an |
| 3934 | optimized method for handling `coding:' tag. |
| 3935 | |
| 3936 | Note that we can get here only if the buffer was empty |
| 3937 | before the insertion. */ |
| 3938 | |
| 3939 | if (!NILP (Vcoding_system_for_read)) |
| 3940 | coding_system = Vcoding_system_for_read; |
| 3941 | else |
| 3942 | { |
| 3943 | /* Since we are sure that the current buffer was empty |
| 3944 | before the insertion, we can toggle |
| 3945 | enable-multibyte-characters directly here without taking |
| 3946 | care of marker adjustment. By this way, we can run Lisp |
| 3947 | program safely before decoding the inserted text. */ |
| 3948 | Lisp_Object unwind_data; |
| 3949 | int count = SPECPDL_INDEX (); |
| 3950 | |
| 3951 | unwind_data = Fcons (current_buffer->enable_multibyte_characters, |
| 3952 | Fcons (current_buffer->undo_list, |
| 3953 | Fcurrent_buffer ())); |
| 3954 | current_buffer->enable_multibyte_characters = Qnil; |
| 3955 | current_buffer->undo_list = Qt; |
| 3956 | record_unwind_protect (decide_coding_unwind, unwind_data); |
| 3957 | |
| 3958 | if (inserted > 0 && ! NILP (Vset_auto_coding_function)) |
| 3959 | { |
| 3960 | coding_system = call2 (Vset_auto_coding_function, |
| 3961 | filename, make_number (inserted)); |
| 3962 | } |
| 3963 | |
| 3964 | if (NILP (coding_system)) |
| 3965 | { |
| 3966 | /* If the coding system is not yet decided, check |
| 3967 | file-coding-system-alist. */ |
| 3968 | Lisp_Object args[6]; |
| 3969 | |
| 3970 | args[0] = Qinsert_file_contents, args[1] = orig_filename; |
| 3971 | args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil; |
| 3972 | coding_system = Ffind_operation_coding_system (6, args); |
| 3973 | if (CONSP (coding_system)) |
| 3974 | coding_system = XCAR (coding_system); |
| 3975 | } |
| 3976 | unbind_to (count, Qnil); |
| 3977 | inserted = Z_BYTE - BEG_BYTE; |
| 3978 | } |
| 3979 | |
| 3980 | if (NILP (coding_system)) |
| 3981 | coding_system = Qundecided; |
| 3982 | else |
| 3983 | CHECK_CODING_SYSTEM (coding_system); |
| 3984 | |
| 3985 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 3986 | /* We must suppress all character code conversion except for |
| 3987 | end-of-line conversion. */ |
| 3988 | coding_system = raw_text_coding_system (coding_system); |
| 3989 | setup_coding_system (coding_system, &coding); |
| 3990 | /* Ensure we set Vlast_coding_system_used. */ |
| 3991 | set_coding_system = 1; |
| 3992 | } |
| 3993 | |
| 3994 | if (!NILP (visit)) |
| 3995 | { |
| 3996 | /* When we visit a file by raw-text, we change the buffer to |
| 3997 | unibyte. */ |
| 3998 | if (CODING_FOR_UNIBYTE (&coding) |
| 3999 | /* Can't do this if part of the buffer might be preserved. */ |
| 4000 | && NILP (replace)) |
| 4001 | /* Visiting a file with these coding system makes the buffer |
| 4002 | unibyte. */ |
| 4003 | current_buffer->enable_multibyte_characters = Qnil; |
| 4004 | } |
| 4005 | |
| 4006 | coding.dst_multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
| 4007 | if (CODING_MAY_REQUIRE_DECODING (&coding) |
| 4008 | && (inserted > 0 || CODING_REQUIRE_FLUSHING (&coding))) |
| 4009 | { |
| 4010 | move_gap_both (PT, PT_BYTE); |
| 4011 | GAP_SIZE += inserted; |
| 4012 | ZV_BYTE -= inserted; |
| 4013 | Z_BYTE -= inserted; |
| 4014 | ZV -= inserted; |
| 4015 | Z -= inserted; |
| 4016 | decode_coding_gap (&coding, inserted, inserted); |
| 4017 | inserted = coding.produced_char; |
| 4018 | coding_system = CODING_ID_NAME (coding.id); |
| 4019 | } |
| 4020 | else if (inserted > 0) |
| 4021 | adjust_after_insert (PT, PT_BYTE, PT + inserted, PT_BYTE + inserted, |
| 4022 | inserted); |
| 4023 | |
| 4024 | /* Now INSERTED is measured in characters. */ |
| 4025 | |
| 4026 | #ifdef DOS_NT |
| 4027 | /* Use the conversion type to determine buffer-file-type |
| 4028 | (find-buffer-file-type is now used to help determine the |
| 4029 | conversion). */ |
| 4030 | if ((VECTORP (CODING_ID_EOL_TYPE (coding.id)) |
| 4031 | || EQ (CODING_ID_EOL_TYPE (coding.id), Qunix)) |
| 4032 | && ! CODING_REQUIRE_DECODING (&coding)) |
| 4033 | current_buffer->buffer_file_type = Qt; |
| 4034 | else |
| 4035 | current_buffer->buffer_file_type = Qnil; |
| 4036 | #endif |
| 4037 | |
| 4038 | handled: |
| 4039 | |
| 4040 | if (!NILP (visit)) |
| 4041 | { |
| 4042 | if (!EQ (current_buffer->undo_list, Qt) && !nochange) |
| 4043 | current_buffer->undo_list = Qnil; |
| 4044 | |
| 4045 | if (NILP (handler)) |
| 4046 | { |
| 4047 | current_buffer->modtime = st.st_mtime; |
| 4048 | current_buffer->filename = orig_filename; |
| 4049 | } |
| 4050 | |
| 4051 | SAVE_MODIFF = MODIFF; |
| 4052 | current_buffer->auto_save_modified = MODIFF; |
| 4053 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
| 4054 | #ifdef CLASH_DETECTION |
| 4055 | if (NILP (handler)) |
| 4056 | { |
| 4057 | if (!NILP (current_buffer->file_truename)) |
| 4058 | unlock_file (current_buffer->file_truename); |
| 4059 | unlock_file (filename); |
| 4060 | } |
| 4061 | #endif /* CLASH_DETECTION */ |
| 4062 | if (not_regular) |
| 4063 | xsignal2 (Qfile_error, |
| 4064 | build_string ("not a regular file"), orig_filename); |
| 4065 | } |
| 4066 | |
| 4067 | if (set_coding_system) |
| 4068 | Vlast_coding_system_used = coding_system; |
| 4069 | |
| 4070 | if (! NILP (Ffboundp (Qafter_insert_file_set_coding))) |
| 4071 | { |
| 4072 | insval = call2 (Qafter_insert_file_set_coding, make_number (inserted), |
| 4073 | visit); |
| 4074 | if (! NILP (insval)) |
| 4075 | { |
| 4076 | CHECK_NUMBER (insval); |
| 4077 | inserted = XFASTINT (insval); |
| 4078 | } |
| 4079 | } |
| 4080 | |
| 4081 | /* Decode file format. */ |
| 4082 | if (inserted > 0) |
| 4083 | { |
| 4084 | /* Don't run point motion or modification hooks when decoding. */ |
| 4085 | int count = SPECPDL_INDEX (); |
| 4086 | int old_inserted = inserted; |
| 4087 | specbind (Qinhibit_point_motion_hooks, Qt); |
| 4088 | specbind (Qinhibit_modification_hooks, Qt); |
| 4089 | |
| 4090 | /* Save old undo list and don't record undo for decoding. */ |
| 4091 | old_undo = current_buffer->undo_list; |
| 4092 | current_buffer->undo_list = Qt; |
| 4093 | |
| 4094 | if (NILP (replace)) |
| 4095 | { |
| 4096 | insval = call3 (Qformat_decode, |
| 4097 | Qnil, make_number (inserted), visit); |
| 4098 | CHECK_NUMBER (insval); |
| 4099 | inserted = XFASTINT (insval); |
| 4100 | } |
| 4101 | else |
| 4102 | { |
| 4103 | /* If REPLACE is non-nil and we succeeded in not replacing the |
| 4104 | beginning or end of the buffer text with the file's contents, |
| 4105 | call format-decode with `point' positioned at the beginning |
| 4106 | of the buffer and `inserted' equalling the number of |
| 4107 | characters in the buffer. Otherwise, format-decode might |
| 4108 | fail to correctly analyze the beginning or end of the buffer. |
| 4109 | Hence we temporarily save `point' and `inserted' here and |
| 4110 | restore `point' iff format-decode did not insert or delete |
| 4111 | any text. Otherwise we leave `point' at point-min. */ |
| 4112 | int opoint = PT; |
| 4113 | int opoint_byte = PT_BYTE; |
| 4114 | int oinserted = ZV - BEGV; |
| 4115 | int ochars_modiff = CHARS_MODIFF; |
| 4116 | |
| 4117 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
| 4118 | insval = call3 (Qformat_decode, |
| 4119 | Qnil, make_number (oinserted), visit); |
| 4120 | CHECK_NUMBER (insval); |
| 4121 | if (ochars_modiff == CHARS_MODIFF) |
| 4122 | /* format_decode didn't modify buffer's characters => move |
| 4123 | point back to position before inserted text and leave |
| 4124 | value of inserted alone. */ |
| 4125 | SET_PT_BOTH (opoint, opoint_byte); |
| 4126 | else |
| 4127 | /* format_decode modified buffer's characters => consider |
| 4128 | entire buffer changed and leave point at point-min. */ |
| 4129 | inserted = XFASTINT (insval); |
| 4130 | } |
| 4131 | |
| 4132 | /* For consistency with format-decode call these now iff inserted > 0 |
| 4133 | (martin 2007-06-28). */ |
| 4134 | p = Vafter_insert_file_functions; |
| 4135 | while (CONSP (p)) |
| 4136 | { |
| 4137 | if (NILP (replace)) |
| 4138 | { |
| 4139 | insval = call1 (XCAR (p), make_number (inserted)); |
| 4140 | if (!NILP (insval)) |
| 4141 | { |
| 4142 | CHECK_NUMBER (insval); |
| 4143 | inserted = XFASTINT (insval); |
| 4144 | } |
| 4145 | } |
| 4146 | else |
| 4147 | { |
| 4148 | /* For the rationale of this see the comment on |
| 4149 | format-decode above. */ |
| 4150 | int opoint = PT; |
| 4151 | int opoint_byte = PT_BYTE; |
| 4152 | int oinserted = ZV - BEGV; |
| 4153 | int ochars_modiff = CHARS_MODIFF; |
| 4154 | |
| 4155 | TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE); |
| 4156 | insval = call1 (XCAR (p), make_number (oinserted)); |
| 4157 | if (!NILP (insval)) |
| 4158 | { |
| 4159 | CHECK_NUMBER (insval); |
| 4160 | if (ochars_modiff == CHARS_MODIFF) |
| 4161 | /* after_insert_file_functions didn't modify |
| 4162 | buffer's characters => move point back to |
| 4163 | position before inserted text and leave value of |
| 4164 | inserted alone. */ |
| 4165 | SET_PT_BOTH (opoint, opoint_byte); |
| 4166 | else |
| 4167 | /* after_insert_file_functions did modify buffer's |
| 4168 | characters => consider entire buffer changed and |
| 4169 | leave point at point-min. */ |
| 4170 | inserted = XFASTINT (insval); |
| 4171 | } |
| 4172 | } |
| 4173 | |
| 4174 | QUIT; |
| 4175 | p = XCDR (p); |
| 4176 | } |
| 4177 | |
| 4178 | if (NILP (visit)) |
| 4179 | { |
| 4180 | current_buffer->undo_list = old_undo; |
| 4181 | if (CONSP (old_undo) && inserted != old_inserted) |
| 4182 | { |
| 4183 | /* Adjust the last undo record for the size change during |
| 4184 | the format conversion. */ |
| 4185 | Lisp_Object tem = XCAR (old_undo); |
| 4186 | if (CONSP (tem) && INTEGERP (XCAR (tem)) |
| 4187 | && INTEGERP (XCDR (tem)) |
| 4188 | && XFASTINT (XCDR (tem)) == PT + old_inserted) |
| 4189 | XSETCDR (tem, make_number (PT + inserted)); |
| 4190 | } |
| 4191 | } |
| 4192 | else |
| 4193 | /* If undo_list was Qt before, keep it that way. |
| 4194 | Otherwise start with an empty undo_list. */ |
| 4195 | current_buffer->undo_list = EQ (old_undo, Qt) ? Qt : Qnil; |
| 4196 | |
| 4197 | unbind_to (count, Qnil); |
| 4198 | } |
| 4199 | |
| 4200 | /* Call after-change hooks for the inserted text, aside from the case |
| 4201 | of normal visiting (not with REPLACE), which is done in a new buffer |
| 4202 | "before" the buffer is changed. */ |
| 4203 | if (inserted > 0 && total > 0 |
| 4204 | && (NILP (visit) || !NILP (replace))) |
| 4205 | { |
| 4206 | signal_after_change (PT, 0, inserted); |
| 4207 | update_compositions (PT, PT, CHECK_BORDER); |
| 4208 | } |
| 4209 | |
| 4210 | if (!NILP (visit) |
| 4211 | && current_buffer->modtime == -1) |
| 4212 | { |
| 4213 | /* If visiting nonexistent file, return nil. */ |
| 4214 | report_file_error ("Opening input file", Fcons (orig_filename, Qnil)); |
| 4215 | } |
| 4216 | |
| 4217 | if (read_quit) |
| 4218 | Fsignal (Qquit, Qnil); |
| 4219 | |
| 4220 | /* ??? Retval needs to be dealt with in all cases consistently. */ |
| 4221 | if (NILP (val)) |
| 4222 | val = Fcons (orig_filename, |
| 4223 | Fcons (make_number (inserted), |
| 4224 | Qnil)); |
| 4225 | |
| 4226 | RETURN_UNGCPRO (unbind_to (count, val)); |
| 4227 | } |
| 4228 | \f |
| 4229 | static Lisp_Object build_annotations P_ ((Lisp_Object, Lisp_Object)); |
| 4230 | |
| 4231 | /* If build_annotations switched buffers, switch back to BUF. |
| 4232 | Kill the temporary buffer that was selected in the meantime. |
| 4233 | |
| 4234 | Since this kill only the last temporary buffer, some buffers remain |
| 4235 | not killed if build_annotations switched buffers more than once. |
| 4236 | -- K.Handa */ |
| 4237 | |
| 4238 | static Lisp_Object |
| 4239 | build_annotations_unwind (buf) |
| 4240 | Lisp_Object buf; |
| 4241 | { |
| 4242 | Lisp_Object tembuf; |
| 4243 | |
| 4244 | if (XBUFFER (buf) == current_buffer) |
| 4245 | return Qnil; |
| 4246 | tembuf = Fcurrent_buffer (); |
| 4247 | Fset_buffer (buf); |
| 4248 | Fkill_buffer (tembuf); |
| 4249 | return Qnil; |
| 4250 | } |
| 4251 | |
| 4252 | /* Decide the coding-system to encode the data with. */ |
| 4253 | |
| 4254 | static Lisp_Object |
| 4255 | choose_write_coding_system (start, end, filename, |
| 4256 | append, visit, lockname, coding) |
| 4257 | Lisp_Object start, end, filename, append, visit, lockname; |
| 4258 | struct coding_system *coding; |
| 4259 | { |
| 4260 | Lisp_Object val; |
| 4261 | Lisp_Object eol_parent = Qnil; |
| 4262 | |
| 4263 | if (auto_saving |
| 4264 | && NILP (Fstring_equal (current_buffer->filename, |
| 4265 | current_buffer->auto_save_file_name))) |
| 4266 | { |
| 4267 | val = Qutf_8_emacs; |
| 4268 | eol_parent = Qunix; |
| 4269 | } |
| 4270 | else if (!NILP (Vcoding_system_for_write)) |
| 4271 | { |
| 4272 | val = Vcoding_system_for_write; |
| 4273 | if (coding_system_require_warning |
| 4274 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) |
| 4275 | /* Confirm that VAL can surely encode the current region. */ |
| 4276 | val = call5 (Vselect_safe_coding_system_function, |
| 4277 | start, end, Fcons (Qt, Fcons (val, Qnil)), |
| 4278 | Qnil, filename); |
| 4279 | } |
| 4280 | else |
| 4281 | { |
| 4282 | /* If the variable `buffer-file-coding-system' is set locally, |
| 4283 | it means that the file was read with some kind of code |
| 4284 | conversion or the variable is explicitly set by users. We |
| 4285 | had better write it out with the same coding system even if |
| 4286 | `enable-multibyte-characters' is nil. |
| 4287 | |
| 4288 | If it is not set locally, we anyway have to convert EOL |
| 4289 | format if the default value of `buffer-file-coding-system' |
| 4290 | tells that it is not Unix-like (LF only) format. */ |
| 4291 | int using_default_coding = 0; |
| 4292 | int force_raw_text = 0; |
| 4293 | |
| 4294 | val = current_buffer->buffer_file_coding_system; |
| 4295 | if (NILP (val) |
| 4296 | || NILP (Flocal_variable_p (Qbuffer_file_coding_system, Qnil))) |
| 4297 | { |
| 4298 | val = Qnil; |
| 4299 | if (NILP (current_buffer->enable_multibyte_characters)) |
| 4300 | force_raw_text = 1; |
| 4301 | } |
| 4302 | |
| 4303 | if (NILP (val)) |
| 4304 | { |
| 4305 | /* Check file-coding-system-alist. */ |
| 4306 | Lisp_Object args[7], coding_systems; |
| 4307 | |
| 4308 | args[0] = Qwrite_region; args[1] = start; args[2] = end; |
| 4309 | args[3] = filename; args[4] = append; args[5] = visit; |
| 4310 | args[6] = lockname; |
| 4311 | coding_systems = Ffind_operation_coding_system (7, args); |
| 4312 | if (CONSP (coding_systems) && !NILP (XCDR (coding_systems))) |
| 4313 | val = XCDR (coding_systems); |
| 4314 | } |
| 4315 | |
| 4316 | if (NILP (val)) |
| 4317 | { |
| 4318 | /* If we still have not decided a coding system, use the |
| 4319 | default value of buffer-file-coding-system. */ |
| 4320 | val = current_buffer->buffer_file_coding_system; |
| 4321 | using_default_coding = 1; |
| 4322 | } |
| 4323 | |
| 4324 | if (! NILP (val) && ! force_raw_text) |
| 4325 | { |
| 4326 | Lisp_Object spec, attrs; |
| 4327 | |
| 4328 | CHECK_CODING_SYSTEM_GET_SPEC (val, spec); |
| 4329 | attrs = AREF (spec, 0); |
| 4330 | if (EQ (CODING_ATTR_TYPE (attrs), Qraw_text)) |
| 4331 | force_raw_text = 1; |
| 4332 | } |
| 4333 | |
| 4334 | if (!force_raw_text |
| 4335 | && !NILP (Ffboundp (Vselect_safe_coding_system_function))) |
| 4336 | /* Confirm that VAL can surely encode the current region. */ |
| 4337 | val = call5 (Vselect_safe_coding_system_function, |
| 4338 | start, end, val, Qnil, filename); |
| 4339 | |
| 4340 | /* If the decided coding-system doesn't specify end-of-line |
| 4341 | format, we use that of |
| 4342 | `default-buffer-file-coding-system'. */ |
| 4343 | if (! using_default_coding |
| 4344 | && ! NILP (buffer_defaults.buffer_file_coding_system)) |
| 4345 | val = (coding_inherit_eol_type |
| 4346 | (val, buffer_defaults.buffer_file_coding_system)); |
| 4347 | |
| 4348 | /* If we decide not to encode text, use `raw-text' or one of its |
| 4349 | subsidiaries. */ |
| 4350 | if (force_raw_text) |
| 4351 | val = raw_text_coding_system (val); |
| 4352 | } |
| 4353 | |
| 4354 | val = coding_inherit_eol_type (val, eol_parent); |
| 4355 | setup_coding_system (val, coding); |
| 4356 | |
| 4357 | if (!STRINGP (start) && !NILP (current_buffer->selective_display)) |
| 4358 | coding->mode |= CODING_MODE_SELECTIVE_DISPLAY; |
| 4359 | return val; |
| 4360 | } |
| 4361 | |
| 4362 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7, |
| 4363 | "r\nFWrite region to file: \ni\ni\ni\np", |
| 4364 | doc: /* Write current region into specified file. |
| 4365 | When called from a program, requires three arguments: |
| 4366 | START, END and FILENAME. START and END are normally buffer positions |
| 4367 | specifying the part of the buffer to write. |
| 4368 | If START is nil, that means to use the entire buffer contents. |
| 4369 | If START is a string, then output that string to the file |
| 4370 | instead of any buffer contents; END is ignored. |
| 4371 | |
| 4372 | Optional fourth argument APPEND if non-nil means |
| 4373 | append to existing file contents (if any). If it is an integer, |
| 4374 | seek to that offset in the file before writing. |
| 4375 | Optional fifth argument VISIT, if t or a string, means |
| 4376 | set the last-save-file-modtime of buffer to this file's modtime |
| 4377 | and mark buffer not modified. |
| 4378 | If VISIT is a string, it is a second file name; |
| 4379 | the output goes to FILENAME, but the buffer is marked as visiting VISIT. |
| 4380 | VISIT is also the file name to lock and unlock for clash detection. |
| 4381 | If VISIT is neither t nor nil nor a string, |
| 4382 | that means do not display the \"Wrote file\" message. |
| 4383 | The optional sixth arg LOCKNAME, if non-nil, specifies the name to |
| 4384 | use for locking and unlocking, overriding FILENAME and VISIT. |
| 4385 | The optional seventh arg MUSTBENEW, if non-nil, insists on a check |
| 4386 | for an existing file with the same name. If MUSTBENEW is `excl', |
| 4387 | that means to get an error if the file already exists; never overwrite. |
| 4388 | If MUSTBENEW is neither nil nor `excl', that means ask for |
| 4389 | confirmation before overwriting, but do go ahead and overwrite the file |
| 4390 | if the user confirms. |
| 4391 | |
| 4392 | This does code conversion according to the value of |
| 4393 | `coding-system-for-write', `buffer-file-coding-system', or |
| 4394 | `file-coding-system-alist', and sets the variable |
| 4395 | `last-coding-system-used' to the coding system actually used. */) |
| 4396 | (start, end, filename, append, visit, lockname, mustbenew) |
| 4397 | Lisp_Object start, end, filename, append, visit, lockname, mustbenew; |
| 4398 | { |
| 4399 | register int desc; |
| 4400 | int failure; |
| 4401 | int save_errno = 0; |
| 4402 | const unsigned char *fn; |
| 4403 | struct stat st; |
| 4404 | int count = SPECPDL_INDEX (); |
| 4405 | int count1; |
| 4406 | Lisp_Object handler; |
| 4407 | Lisp_Object visit_file; |
| 4408 | Lisp_Object annotations; |
| 4409 | Lisp_Object encoded_filename; |
| 4410 | int visiting = (EQ (visit, Qt) || STRINGP (visit)); |
| 4411 | int quietly = !NILP (visit); |
| 4412 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 4413 | struct buffer *given_buffer; |
| 4414 | #ifdef DOS_NT |
| 4415 | int buffer_file_type = O_BINARY; |
| 4416 | #endif /* DOS_NT */ |
| 4417 | struct coding_system coding; |
| 4418 | |
| 4419 | if (current_buffer->base_buffer && visiting) |
| 4420 | error ("Cannot do file visiting in an indirect buffer"); |
| 4421 | |
| 4422 | if (!NILP (start) && !STRINGP (start)) |
| 4423 | validate_region (&start, &end); |
| 4424 | |
| 4425 | visit_file = Qnil; |
| 4426 | GCPRO5 (start, filename, visit, visit_file, lockname); |
| 4427 | |
| 4428 | filename = Fexpand_file_name (filename, Qnil); |
| 4429 | |
| 4430 | if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
| 4431 | barf_or_query_if_file_exists (filename, "overwrite", 1, 0, 1); |
| 4432 | |
| 4433 | if (STRINGP (visit)) |
| 4434 | visit_file = Fexpand_file_name (visit, Qnil); |
| 4435 | else |
| 4436 | visit_file = filename; |
| 4437 | |
| 4438 | if (NILP (lockname)) |
| 4439 | lockname = visit_file; |
| 4440 | |
| 4441 | annotations = Qnil; |
| 4442 | |
| 4443 | /* If the file name has special constructs in it, |
| 4444 | call the corresponding file handler. */ |
| 4445 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
| 4446 | /* If FILENAME has no handler, see if VISIT has one. */ |
| 4447 | if (NILP (handler) && STRINGP (visit)) |
| 4448 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
| 4449 | |
| 4450 | if (!NILP (handler)) |
| 4451 | { |
| 4452 | Lisp_Object val; |
| 4453 | val = call6 (handler, Qwrite_region, start, end, |
| 4454 | filename, append, visit); |
| 4455 | |
| 4456 | if (visiting) |
| 4457 | { |
| 4458 | SAVE_MODIFF = MODIFF; |
| 4459 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
| 4460 | current_buffer->filename = visit_file; |
| 4461 | } |
| 4462 | UNGCPRO; |
| 4463 | return val; |
| 4464 | } |
| 4465 | |
| 4466 | record_unwind_protect (save_restriction_restore, save_restriction_save ()); |
| 4467 | |
| 4468 | /* Special kludge to simplify auto-saving. */ |
| 4469 | if (NILP (start)) |
| 4470 | { |
| 4471 | /* Do it later, so write-region-annotate-function can work differently |
| 4472 | if we save "the buffer" vs "a region". |
| 4473 | This is useful in tar-mode. --Stef |
| 4474 | XSETFASTINT (start, BEG); |
| 4475 | XSETFASTINT (end, Z); */ |
| 4476 | Fwiden (); |
| 4477 | } |
| 4478 | |
| 4479 | record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); |
| 4480 | count1 = SPECPDL_INDEX (); |
| 4481 | |
| 4482 | given_buffer = current_buffer; |
| 4483 | |
| 4484 | if (!STRINGP (start)) |
| 4485 | { |
| 4486 | annotations = build_annotations (start, end); |
| 4487 | |
| 4488 | if (current_buffer != given_buffer) |
| 4489 | { |
| 4490 | XSETFASTINT (start, BEGV); |
| 4491 | XSETFASTINT (end, ZV); |
| 4492 | } |
| 4493 | } |
| 4494 | |
| 4495 | if (NILP (start)) |
| 4496 | { |
| 4497 | XSETFASTINT (start, BEGV); |
| 4498 | XSETFASTINT (end, ZV); |
| 4499 | } |
| 4500 | |
| 4501 | UNGCPRO; |
| 4502 | |
| 4503 | GCPRO5 (start, filename, annotations, visit_file, lockname); |
| 4504 | |
| 4505 | /* Decide the coding-system to encode the data with. |
| 4506 | We used to make this choice before calling build_annotations, but that |
| 4507 | leads to problems when a write-annotate-function takes care of |
| 4508 | unsavable chars (as was the case with X-Symbol). */ |
| 4509 | Vlast_coding_system_used |
| 4510 | = choose_write_coding_system (start, end, filename, |
| 4511 | append, visit, lockname, &coding); |
| 4512 | |
| 4513 | #ifdef CLASH_DETECTION |
| 4514 | if (!auto_saving) |
| 4515 | { |
| 4516 | #if 0 /* This causes trouble for GNUS. */ |
| 4517 | /* If we've locked this file for some other buffer, |
| 4518 | query before proceeding. */ |
| 4519 | if (!visiting && EQ (Ffile_locked_p (lockname), Qt)) |
| 4520 | call2 (intern ("ask-user-about-lock"), filename, Vuser_login_name); |
| 4521 | #endif |
| 4522 | |
| 4523 | lock_file (lockname); |
| 4524 | } |
| 4525 | #endif /* CLASH_DETECTION */ |
| 4526 | |
| 4527 | encoded_filename = ENCODE_FILE (filename); |
| 4528 | |
| 4529 | fn = SDATA (encoded_filename); |
| 4530 | desc = -1; |
| 4531 | if (!NILP (append)) |
| 4532 | #ifdef DOS_NT |
| 4533 | desc = emacs_open (fn, O_WRONLY | buffer_file_type, 0); |
| 4534 | #else /* not DOS_NT */ |
| 4535 | desc = emacs_open (fn, O_WRONLY, 0); |
| 4536 | #endif /* not DOS_NT */ |
| 4537 | |
| 4538 | if (desc < 0 && (NILP (append) || errno == ENOENT)) |
| 4539 | #ifdef DOS_NT |
| 4540 | desc = emacs_open (fn, |
| 4541 | O_WRONLY | O_CREAT | buffer_file_type |
| 4542 | | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC), |
| 4543 | S_IREAD | S_IWRITE); |
| 4544 | #else /* not DOS_NT */ |
| 4545 | desc = emacs_open (fn, O_WRONLY | O_TRUNC | O_CREAT |
| 4546 | | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), |
| 4547 | auto_saving ? auto_save_mode_bits : 0666); |
| 4548 | #endif /* not DOS_NT */ |
| 4549 | |
| 4550 | if (desc < 0) |
| 4551 | { |
| 4552 | #ifdef CLASH_DETECTION |
| 4553 | save_errno = errno; |
| 4554 | if (!auto_saving) unlock_file (lockname); |
| 4555 | errno = save_errno; |
| 4556 | #endif /* CLASH_DETECTION */ |
| 4557 | UNGCPRO; |
| 4558 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
| 4559 | } |
| 4560 | |
| 4561 | record_unwind_protect (close_file_unwind, make_number (desc)); |
| 4562 | |
| 4563 | if (!NILP (append) && !NILP (Ffile_regular_p (filename))) |
| 4564 | { |
| 4565 | long ret; |
| 4566 | |
| 4567 | if (NUMBERP (append)) |
| 4568 | ret = lseek (desc, XINT (append), 1); |
| 4569 | else |
| 4570 | ret = lseek (desc, 0, 2); |
| 4571 | if (ret < 0) |
| 4572 | { |
| 4573 | #ifdef CLASH_DETECTION |
| 4574 | if (!auto_saving) unlock_file (lockname); |
| 4575 | #endif /* CLASH_DETECTION */ |
| 4576 | UNGCPRO; |
| 4577 | report_file_error ("Lseek error", Fcons (filename, Qnil)); |
| 4578 | } |
| 4579 | } |
| 4580 | |
| 4581 | UNGCPRO; |
| 4582 | |
| 4583 | #if 0 |
| 4584 | /* The new encoding routine doesn't require the following. */ |
| 4585 | |
| 4586 | /* Whether VMS or not, we must move the gap to the next of newline |
| 4587 | when we must put designation sequences at beginning of line. */ |
| 4588 | if (INTEGERP (start) |
| 4589 | && coding.type == coding_type_iso2022 |
| 4590 | && coding.flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL |
| 4591 | && GPT > BEG && GPT_ADDR[-1] != '\n') |
| 4592 | { |
| 4593 | int opoint = PT, opoint_byte = PT_BYTE; |
| 4594 | scan_newline (PT, PT_BYTE, ZV, ZV_BYTE, 1, 0); |
| 4595 | move_gap_both (PT, PT_BYTE); |
| 4596 | SET_PT_BOTH (opoint, opoint_byte); |
| 4597 | } |
| 4598 | #endif |
| 4599 | |
| 4600 | failure = 0; |
| 4601 | immediate_quit = 1; |
| 4602 | |
| 4603 | if (STRINGP (start)) |
| 4604 | { |
| 4605 | failure = 0 > a_write (desc, start, 0, SCHARS (start), |
| 4606 | &annotations, &coding); |
| 4607 | save_errno = errno; |
| 4608 | } |
| 4609 | else if (XINT (start) != XINT (end)) |
| 4610 | { |
| 4611 | failure = 0 > a_write (desc, Qnil, |
| 4612 | XINT (start), XINT (end) - XINT (start), |
| 4613 | &annotations, &coding); |
| 4614 | save_errno = errno; |
| 4615 | } |
| 4616 | else |
| 4617 | { |
| 4618 | /* If file was empty, still need to write the annotations */ |
| 4619 | coding.mode |= CODING_MODE_LAST_BLOCK; |
| 4620 | failure = 0 > a_write (desc, Qnil, XINT (end), 0, &annotations, &coding); |
| 4621 | save_errno = errno; |
| 4622 | } |
| 4623 | |
| 4624 | if (CODING_REQUIRE_FLUSHING (&coding) |
| 4625 | && !(coding.mode & CODING_MODE_LAST_BLOCK) |
| 4626 | && ! failure) |
| 4627 | { |
| 4628 | /* We have to flush out a data. */ |
| 4629 | coding.mode |= CODING_MODE_LAST_BLOCK; |
| 4630 | failure = 0 > e_write (desc, Qnil, 1, 1, &coding); |
| 4631 | save_errno = errno; |
| 4632 | } |
| 4633 | |
| 4634 | immediate_quit = 0; |
| 4635 | |
| 4636 | #ifdef HAVE_FSYNC |
| 4637 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
| 4638 | Disk full in NFS may be reported here. */ |
| 4639 | /* mib says that closing the file will try to write as fast as NFS can do |
| 4640 | it, and that means the fsync here is not crucial for autosave files. */ |
| 4641 | if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0) |
| 4642 | { |
| 4643 | /* If fsync fails with EINTR, don't treat that as serious. Also |
| 4644 | ignore EINVAL which happens when fsync is not supported on this |
| 4645 | file. */ |
| 4646 | if (errno != EINTR && errno != EINVAL) |
| 4647 | failure = 1, save_errno = errno; |
| 4648 | } |
| 4649 | #endif |
| 4650 | |
| 4651 | /* Spurious "file has changed on disk" warnings have been |
| 4652 | observed on Suns as well. |
| 4653 | It seems that `close' can change the modtime, under nfs. |
| 4654 | |
| 4655 | (This has supposedly been fixed in Sunos 4, |
| 4656 | but who knows about all the other machines with NFS?) */ |
| 4657 | #if 0 |
| 4658 | |
| 4659 | #define FOO |
| 4660 | fstat (desc, &st); |
| 4661 | #endif |
| 4662 | |
| 4663 | /* NFS can report a write failure now. */ |
| 4664 | if (emacs_close (desc) < 0) |
| 4665 | failure = 1, save_errno = errno; |
| 4666 | |
| 4667 | #ifndef FOO |
| 4668 | stat (fn, &st); |
| 4669 | #endif |
| 4670 | /* Discard the unwind protect for close_file_unwind. */ |
| 4671 | specpdl_ptr = specpdl + count1; |
| 4672 | /* Restore the original current buffer. */ |
| 4673 | visit_file = unbind_to (count, visit_file); |
| 4674 | |
| 4675 | #ifdef CLASH_DETECTION |
| 4676 | if (!auto_saving) |
| 4677 | unlock_file (lockname); |
| 4678 | #endif /* CLASH_DETECTION */ |
| 4679 | |
| 4680 | /* Do this before reporting IO error |
| 4681 | to avoid a "file has changed on disk" warning on |
| 4682 | next attempt to save. */ |
| 4683 | if (visiting) |
| 4684 | current_buffer->modtime = st.st_mtime; |
| 4685 | |
| 4686 | if (failure) |
| 4687 | error ("IO error writing %s: %s", SDATA (filename), |
| 4688 | emacs_strerror (save_errno)); |
| 4689 | |
| 4690 | if (visiting) |
| 4691 | { |
| 4692 | SAVE_MODIFF = MODIFF; |
| 4693 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
| 4694 | current_buffer->filename = visit_file; |
| 4695 | update_mode_lines++; |
| 4696 | } |
| 4697 | else if (quietly) |
| 4698 | { |
| 4699 | if (auto_saving |
| 4700 | && ! NILP (Fstring_equal (current_buffer->filename, |
| 4701 | current_buffer->auto_save_file_name))) |
| 4702 | SAVE_MODIFF = MODIFF; |
| 4703 | |
| 4704 | return Qnil; |
| 4705 | } |
| 4706 | |
| 4707 | if (!auto_saving) |
| 4708 | message_with_string ((INTEGERP (append) |
| 4709 | ? "Updated %s" |
| 4710 | : ! NILP (append) |
| 4711 | ? "Added to %s" |
| 4712 | : "Wrote %s"), |
| 4713 | visit_file, 1); |
| 4714 | |
| 4715 | return Qnil; |
| 4716 | } |
| 4717 | \f |
| 4718 | Lisp_Object merge (); |
| 4719 | |
| 4720 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, |
| 4721 | doc: /* Return t if (car A) is numerically less than (car B). */) |
| 4722 | (a, b) |
| 4723 | Lisp_Object a, b; |
| 4724 | { |
| 4725 | return Flss (Fcar (a), Fcar (b)); |
| 4726 | } |
| 4727 | |
| 4728 | /* Build the complete list of annotations appropriate for writing out |
| 4729 | the text between START and END, by calling all the functions in |
| 4730 | write-region-annotate-functions and merging the lists they return. |
| 4731 | If one of these functions switches to a different buffer, we assume |
| 4732 | that buffer contains altered text. Therefore, the caller must |
| 4733 | make sure to restore the current buffer in all cases, |
| 4734 | as save-excursion would do. */ |
| 4735 | |
| 4736 | static Lisp_Object |
| 4737 | build_annotations (start, end) |
| 4738 | Lisp_Object start, end; |
| 4739 | { |
| 4740 | Lisp_Object annotations; |
| 4741 | Lisp_Object p, res; |
| 4742 | struct gcpro gcpro1, gcpro2; |
| 4743 | Lisp_Object original_buffer; |
| 4744 | int i, used_global = 0; |
| 4745 | |
| 4746 | XSETBUFFER (original_buffer, current_buffer); |
| 4747 | |
| 4748 | annotations = Qnil; |
| 4749 | p = Vwrite_region_annotate_functions; |
| 4750 | GCPRO2 (annotations, p); |
| 4751 | while (CONSP (p)) |
| 4752 | { |
| 4753 | struct buffer *given_buffer = current_buffer; |
| 4754 | if (EQ (Qt, XCAR (p)) && !used_global) |
| 4755 | { /* Use the global value of the hook. */ |
| 4756 | Lisp_Object arg[2]; |
| 4757 | used_global = 1; |
| 4758 | arg[0] = Fdefault_value (Qwrite_region_annotate_functions); |
| 4759 | arg[1] = XCDR (p); |
| 4760 | p = Fappend (2, arg); |
| 4761 | continue; |
| 4762 | } |
| 4763 | Vwrite_region_annotations_so_far = annotations; |
| 4764 | res = call2 (XCAR (p), start, end); |
| 4765 | /* If the function makes a different buffer current, |
| 4766 | assume that means this buffer contains altered text to be output. |
| 4767 | Reset START and END from the buffer bounds |
| 4768 | and discard all previous annotations because they should have |
| 4769 | been dealt with by this function. */ |
| 4770 | if (current_buffer != given_buffer) |
| 4771 | { |
| 4772 | XSETFASTINT (start, BEGV); |
| 4773 | XSETFASTINT (end, ZV); |
| 4774 | annotations = Qnil; |
| 4775 | } |
| 4776 | Flength (res); /* Check basic validity of return value */ |
| 4777 | annotations = merge (annotations, res, Qcar_less_than_car); |
| 4778 | p = XCDR (p); |
| 4779 | } |
| 4780 | |
| 4781 | /* Now do the same for annotation functions implied by the file-format */ |
| 4782 | if (auto_saving && (!EQ (current_buffer->auto_save_file_format, Qt))) |
| 4783 | p = current_buffer->auto_save_file_format; |
| 4784 | else |
| 4785 | p = current_buffer->file_format; |
| 4786 | for (i = 0; CONSP (p); p = XCDR (p), ++i) |
| 4787 | { |
| 4788 | struct buffer *given_buffer = current_buffer; |
| 4789 | |
| 4790 | Vwrite_region_annotations_so_far = annotations; |
| 4791 | |
| 4792 | /* Value is either a list of annotations or nil if the function |
| 4793 | has written annotations to a temporary buffer, which is now |
| 4794 | current. */ |
| 4795 | res = call5 (Qformat_annotate_function, XCAR (p), start, end, |
| 4796 | original_buffer, make_number (i)); |
| 4797 | if (current_buffer != given_buffer) |
| 4798 | { |
| 4799 | XSETFASTINT (start, BEGV); |
| 4800 | XSETFASTINT (end, ZV); |
| 4801 | annotations = Qnil; |
| 4802 | } |
| 4803 | |
| 4804 | if (CONSP (res)) |
| 4805 | annotations = merge (annotations, res, Qcar_less_than_car); |
| 4806 | } |
| 4807 | |
| 4808 | UNGCPRO; |
| 4809 | return annotations; |
| 4810 | } |
| 4811 | |
| 4812 | \f |
| 4813 | /* Write to descriptor DESC the NCHARS chars starting at POS of STRING. |
| 4814 | If STRING is nil, POS is the character position in the current buffer. |
| 4815 | Intersperse with them the annotations from *ANNOT |
| 4816 | which fall within the range of POS to POS + NCHARS, |
| 4817 | each at its appropriate position. |
| 4818 | |
| 4819 | We modify *ANNOT by discarding elements as we use them up. |
| 4820 | |
| 4821 | The return value is negative in case of system call failure. */ |
| 4822 | |
| 4823 | static int |
| 4824 | a_write (desc, string, pos, nchars, annot, coding) |
| 4825 | int desc; |
| 4826 | Lisp_Object string; |
| 4827 | register int nchars; |
| 4828 | int pos; |
| 4829 | Lisp_Object *annot; |
| 4830 | struct coding_system *coding; |
| 4831 | { |
| 4832 | Lisp_Object tem; |
| 4833 | int nextpos; |
| 4834 | int lastpos = pos + nchars; |
| 4835 | |
| 4836 | while (NILP (*annot) || CONSP (*annot)) |
| 4837 | { |
| 4838 | tem = Fcar_safe (Fcar (*annot)); |
| 4839 | nextpos = pos - 1; |
| 4840 | if (INTEGERP (tem)) |
| 4841 | nextpos = XFASTINT (tem); |
| 4842 | |
| 4843 | /* If there are no more annotations in this range, |
| 4844 | output the rest of the range all at once. */ |
| 4845 | if (! (nextpos >= pos && nextpos <= lastpos)) |
| 4846 | return e_write (desc, string, pos, lastpos, coding); |
| 4847 | |
| 4848 | /* Output buffer text up to the next annotation's position. */ |
| 4849 | if (nextpos > pos) |
| 4850 | { |
| 4851 | if (0 > e_write (desc, string, pos, nextpos, coding)) |
| 4852 | return -1; |
| 4853 | pos = nextpos; |
| 4854 | } |
| 4855 | /* Output the annotation. */ |
| 4856 | tem = Fcdr (Fcar (*annot)); |
| 4857 | if (STRINGP (tem)) |
| 4858 | { |
| 4859 | if (0 > e_write (desc, tem, 0, SCHARS (tem), coding)) |
| 4860 | return -1; |
| 4861 | } |
| 4862 | *annot = Fcdr (*annot); |
| 4863 | } |
| 4864 | return 0; |
| 4865 | } |
| 4866 | |
| 4867 | |
| 4868 | /* Write text in the range START and END into descriptor DESC, |
| 4869 | encoding them with coding system CODING. If STRING is nil, START |
| 4870 | and END are character positions of the current buffer, else they |
| 4871 | are indexes to the string STRING. */ |
| 4872 | |
| 4873 | static int |
| 4874 | e_write (desc, string, start, end, coding) |
| 4875 | int desc; |
| 4876 | Lisp_Object string; |
| 4877 | int start, end; |
| 4878 | struct coding_system *coding; |
| 4879 | { |
| 4880 | if (STRINGP (string)) |
| 4881 | { |
| 4882 | start = 0; |
| 4883 | end = SCHARS (string); |
| 4884 | } |
| 4885 | |
| 4886 | /* We used to have a code for handling selective display here. But, |
| 4887 | now it is handled within encode_coding. */ |
| 4888 | |
| 4889 | while (start < end) |
| 4890 | { |
| 4891 | if (STRINGP (string)) |
| 4892 | { |
| 4893 | coding->src_multibyte = SCHARS (string) < SBYTES (string); |
| 4894 | if (CODING_REQUIRE_ENCODING (coding)) |
| 4895 | { |
| 4896 | encode_coding_object (coding, string, |
| 4897 | start, string_char_to_byte (string, start), |
| 4898 | end, string_char_to_byte (string, end), Qt); |
| 4899 | } |
| 4900 | else |
| 4901 | { |
| 4902 | coding->dst_object = string; |
| 4903 | coding->consumed_char = SCHARS (string); |
| 4904 | coding->produced = SBYTES (string); |
| 4905 | } |
| 4906 | } |
| 4907 | else |
| 4908 | { |
| 4909 | int start_byte = CHAR_TO_BYTE (start); |
| 4910 | int end_byte = CHAR_TO_BYTE (end); |
| 4911 | |
| 4912 | coding->src_multibyte = (end - start) < (end_byte - start_byte); |
| 4913 | if (CODING_REQUIRE_ENCODING (coding)) |
| 4914 | { |
| 4915 | encode_coding_object (coding, Fcurrent_buffer (), |
| 4916 | start, start_byte, end, end_byte, Qt); |
| 4917 | } |
| 4918 | else |
| 4919 | { |
| 4920 | coding->dst_object = Qnil; |
| 4921 | coding->dst_pos_byte = start_byte; |
| 4922 | if (start >= GPT || end <= GPT) |
| 4923 | { |
| 4924 | coding->consumed_char = end - start; |
| 4925 | coding->produced = end_byte - start_byte; |
| 4926 | } |
| 4927 | else |
| 4928 | { |
| 4929 | coding->consumed_char = GPT - start; |
| 4930 | coding->produced = GPT_BYTE - start_byte; |
| 4931 | } |
| 4932 | } |
| 4933 | } |
| 4934 | |
| 4935 | if (coding->produced > 0) |
| 4936 | { |
| 4937 | coding->produced -= |
| 4938 | emacs_write (desc, |
| 4939 | STRINGP (coding->dst_object) |
| 4940 | ? SDATA (coding->dst_object) |
| 4941 | : BYTE_POS_ADDR (coding->dst_pos_byte), |
| 4942 | coding->produced); |
| 4943 | |
| 4944 | if (coding->produced) |
| 4945 | return -1; |
| 4946 | } |
| 4947 | start += coding->consumed_char; |
| 4948 | } |
| 4949 | |
| 4950 | return 0; |
| 4951 | } |
| 4952 | \f |
| 4953 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
| 4954 | Sverify_visited_file_modtime, 1, 1, 0, |
| 4955 | doc: /* Return t if last mod time of BUF's visited file matches what BUF records. |
| 4956 | This means that the file has not been changed since it was visited or saved. |
| 4957 | See Info node `(elisp)Modification Time' for more details. */) |
| 4958 | (buf) |
| 4959 | Lisp_Object buf; |
| 4960 | { |
| 4961 | struct buffer *b; |
| 4962 | struct stat st; |
| 4963 | Lisp_Object handler; |
| 4964 | Lisp_Object filename; |
| 4965 | |
| 4966 | CHECK_BUFFER (buf); |
| 4967 | b = XBUFFER (buf); |
| 4968 | |
| 4969 | if (!STRINGP (b->filename)) return Qt; |
| 4970 | if (b->modtime == 0) return Qt; |
| 4971 | |
| 4972 | /* If the file name has special constructs in it, |
| 4973 | call the corresponding file handler. */ |
| 4974 | handler = Ffind_file_name_handler (b->filename, |
| 4975 | Qverify_visited_file_modtime); |
| 4976 | if (!NILP (handler)) |
| 4977 | return call2 (handler, Qverify_visited_file_modtime, buf); |
| 4978 | |
| 4979 | filename = ENCODE_FILE (b->filename); |
| 4980 | |
| 4981 | if (stat (SDATA (filename), &st) < 0) |
| 4982 | { |
| 4983 | /* If the file doesn't exist now and didn't exist before, |
| 4984 | we say that it isn't modified, provided the error is a tame one. */ |
| 4985 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) |
| 4986 | st.st_mtime = -1; |
| 4987 | else |
| 4988 | st.st_mtime = 0; |
| 4989 | } |
| 4990 | if (st.st_mtime == b->modtime |
| 4991 | /* If both are positive, accept them if they are off by one second. */ |
| 4992 | || (st.st_mtime > 0 && b->modtime > 0 |
| 4993 | && (st.st_mtime == b->modtime + 1 |
| 4994 | || st.st_mtime == b->modtime - 1))) |
| 4995 | return Qt; |
| 4996 | return Qnil; |
| 4997 | } |
| 4998 | |
| 4999 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, |
| 5000 | Sclear_visited_file_modtime, 0, 0, 0, |
| 5001 | doc: /* Clear out records of last mod time of visited file. |
| 5002 | Next attempt to save will certainly not complain of a discrepancy. */) |
| 5003 | () |
| 5004 | { |
| 5005 | current_buffer->modtime = 0; |
| 5006 | return Qnil; |
| 5007 | } |
| 5008 | |
| 5009 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
| 5010 | Svisited_file_modtime, 0, 0, 0, |
| 5011 | doc: /* Return the current buffer's recorded visited file modification time. |
| 5012 | The value is a list of the form (HIGH LOW), like the time values |
| 5013 | that `file-attributes' returns. If the current buffer has no recorded |
| 5014 | file modification time, this function returns 0. |
| 5015 | See Info node `(elisp)Modification Time' for more details. */) |
| 5016 | () |
| 5017 | { |
| 5018 | if (! current_buffer->modtime) |
| 5019 | return make_number (0); |
| 5020 | return make_time ((time_t) current_buffer->modtime); |
| 5021 | } |
| 5022 | |
| 5023 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
| 5024 | Sset_visited_file_modtime, 0, 1, 0, |
| 5025 | doc: /* Update buffer's recorded modification time from the visited file's time. |
| 5026 | Useful if the buffer was not read from the file normally |
| 5027 | or if the file itself has been changed for some known benign reason. |
| 5028 | An argument specifies the modification time value to use |
| 5029 | \(instead of that of the visited file), in the form of a list |
| 5030 | \(HIGH . LOW) or (HIGH LOW). */) |
| 5031 | (time_list) |
| 5032 | Lisp_Object time_list; |
| 5033 | { |
| 5034 | if (!NILP (time_list)) |
| 5035 | current_buffer->modtime = cons_to_long (time_list); |
| 5036 | else |
| 5037 | { |
| 5038 | register Lisp_Object filename; |
| 5039 | struct stat st; |
| 5040 | Lisp_Object handler; |
| 5041 | |
| 5042 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
| 5043 | |
| 5044 | /* If the file name has special constructs in it, |
| 5045 | call the corresponding file handler. */ |
| 5046 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
| 5047 | if (!NILP (handler)) |
| 5048 | /* The handler can find the file name the same way we did. */ |
| 5049 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
| 5050 | |
| 5051 | filename = ENCODE_FILE (filename); |
| 5052 | |
| 5053 | if (stat (SDATA (filename), &st) >= 0) |
| 5054 | current_buffer->modtime = st.st_mtime; |
| 5055 | } |
| 5056 | |
| 5057 | return Qnil; |
| 5058 | } |
| 5059 | \f |
| 5060 | Lisp_Object |
| 5061 | auto_save_error (error) |
| 5062 | Lisp_Object error; |
| 5063 | { |
| 5064 | Lisp_Object args[3], msg; |
| 5065 | int i, nbytes; |
| 5066 | struct gcpro gcpro1; |
| 5067 | char *msgbuf; |
| 5068 | USE_SAFE_ALLOCA; |
| 5069 | |
| 5070 | auto_save_error_occurred = 1; |
| 5071 | |
| 5072 | ring_bell (XFRAME (selected_frame)); |
| 5073 | |
| 5074 | args[0] = build_string ("Auto-saving %s: %s"); |
| 5075 | args[1] = current_buffer->name; |
| 5076 | args[2] = Ferror_message_string (error); |
| 5077 | msg = Fformat (3, args); |
| 5078 | GCPRO1 (msg); |
| 5079 | nbytes = SBYTES (msg); |
| 5080 | SAFE_ALLOCA (msgbuf, char *, nbytes); |
| 5081 | bcopy (SDATA (msg), msgbuf, nbytes); |
| 5082 | |
| 5083 | for (i = 0; i < 3; ++i) |
| 5084 | { |
| 5085 | if (i == 0) |
| 5086 | message2 (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
| 5087 | else |
| 5088 | message2_nolog (msgbuf, nbytes, STRING_MULTIBYTE (msg)); |
| 5089 | Fsleep_for (make_number (1), Qnil); |
| 5090 | } |
| 5091 | |
| 5092 | SAFE_FREE (); |
| 5093 | UNGCPRO; |
| 5094 | return Qnil; |
| 5095 | } |
| 5096 | |
| 5097 | Lisp_Object |
| 5098 | auto_save_1 () |
| 5099 | { |
| 5100 | struct stat st; |
| 5101 | Lisp_Object modes; |
| 5102 | |
| 5103 | auto_save_mode_bits = 0666; |
| 5104 | |
| 5105 | /* Get visited file's mode to become the auto save file's mode. */ |
| 5106 | if (! NILP (current_buffer->filename)) |
| 5107 | { |
| 5108 | if (stat (SDATA (current_buffer->filename), &st) >= 0) |
| 5109 | /* But make sure we can overwrite it later! */ |
| 5110 | auto_save_mode_bits = st.st_mode | 0600; |
| 5111 | else if ((modes = Ffile_modes (current_buffer->filename), |
| 5112 | INTEGERP (modes))) |
| 5113 | /* Remote files don't cooperate with stat. */ |
| 5114 | auto_save_mode_bits = XINT (modes) | 0600; |
| 5115 | } |
| 5116 | |
| 5117 | return |
| 5118 | Fwrite_region (Qnil, Qnil, current_buffer->auto_save_file_name, Qnil, |
| 5119 | NILP (Vauto_save_visited_file_name) ? Qlambda : Qt, |
| 5120 | Qnil, Qnil); |
| 5121 | } |
| 5122 | |
| 5123 | static Lisp_Object |
| 5124 | do_auto_save_unwind (arg) /* used as unwind-protect function */ |
| 5125 | Lisp_Object arg; |
| 5126 | { |
| 5127 | FILE *stream = (FILE *) XSAVE_VALUE (arg)->pointer; |
| 5128 | auto_saving = 0; |
| 5129 | if (stream != NULL) |
| 5130 | { |
| 5131 | BLOCK_INPUT; |
| 5132 | fclose (stream); |
| 5133 | UNBLOCK_INPUT; |
| 5134 | } |
| 5135 | return Qnil; |
| 5136 | } |
| 5137 | |
| 5138 | static Lisp_Object |
| 5139 | do_auto_save_unwind_1 (value) /* used as unwind-protect function */ |
| 5140 | Lisp_Object value; |
| 5141 | { |
| 5142 | minibuffer_auto_raise = XINT (value); |
| 5143 | return Qnil; |
| 5144 | } |
| 5145 | |
| 5146 | static Lisp_Object |
| 5147 | do_auto_save_make_dir (dir) |
| 5148 | Lisp_Object dir; |
| 5149 | { |
| 5150 | Lisp_Object mode; |
| 5151 | |
| 5152 | call2 (Qmake_directory, dir, Qt); |
| 5153 | XSETFASTINT (mode, 0700); |
| 5154 | return Fset_file_modes (dir, mode); |
| 5155 | } |
| 5156 | |
| 5157 | static Lisp_Object |
| 5158 | do_auto_save_eh (ignore) |
| 5159 | Lisp_Object ignore; |
| 5160 | { |
| 5161 | return Qnil; |
| 5162 | } |
| 5163 | |
| 5164 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
| 5165 | doc: /* Auto-save all buffers that need it. |
| 5166 | This is all buffers that have auto-saving enabled |
| 5167 | and are changed since last auto-saved. |
| 5168 | Auto-saving writes the buffer into a file |
| 5169 | so that your editing is not lost if the system crashes. |
| 5170 | This file is not the file you visited; that changes only when you save. |
| 5171 | Normally we run the normal hook `auto-save-hook' before saving. |
| 5172 | |
| 5173 | A non-nil NO-MESSAGE argument means do not print any message if successful. |
| 5174 | A non-nil CURRENT-ONLY argument means save only current buffer. */) |
| 5175 | (no_message, current_only) |
| 5176 | Lisp_Object no_message, current_only; |
| 5177 | { |
| 5178 | struct buffer *old = current_buffer, *b; |
| 5179 | Lisp_Object tail, buf; |
| 5180 | int auto_saved = 0; |
| 5181 | int do_handled_files; |
| 5182 | Lisp_Object oquit; |
| 5183 | FILE *stream = NULL; |
| 5184 | int count = SPECPDL_INDEX (); |
| 5185 | int orig_minibuffer_auto_raise = minibuffer_auto_raise; |
| 5186 | int old_message_p = 0; |
| 5187 | struct gcpro gcpro1, gcpro2; |
| 5188 | |
| 5189 | if (max_specpdl_size < specpdl_size + 40) |
| 5190 | max_specpdl_size = specpdl_size + 40; |
| 5191 | |
| 5192 | if (minibuf_level) |
| 5193 | no_message = Qt; |
| 5194 | |
| 5195 | if (NILP (no_message)) |
| 5196 | { |
| 5197 | old_message_p = push_message (); |
| 5198 | record_unwind_protect (pop_message_unwind, Qnil); |
| 5199 | } |
| 5200 | |
| 5201 | /* Ordinarily don't quit within this function, |
| 5202 | but don't make it impossible to quit (in case we get hung in I/O). */ |
| 5203 | oquit = Vquit_flag; |
| 5204 | Vquit_flag = Qnil; |
| 5205 | |
| 5206 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables |
| 5207 | point to non-strings reached from Vbuffer_alist. */ |
| 5208 | |
| 5209 | if (!NILP (Vrun_hooks)) |
| 5210 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
| 5211 | |
| 5212 | if (STRINGP (Vauto_save_list_file_name)) |
| 5213 | { |
| 5214 | Lisp_Object listfile; |
| 5215 | |
| 5216 | listfile = Fexpand_file_name (Vauto_save_list_file_name, Qnil); |
| 5217 | |
| 5218 | /* Don't try to create the directory when shutting down Emacs, |
| 5219 | because creating the directory might signal an error, and |
| 5220 | that would leave Emacs in a strange state. */ |
| 5221 | if (!NILP (Vrun_hooks)) |
| 5222 | { |
| 5223 | Lisp_Object dir; |
| 5224 | dir = Qnil; |
| 5225 | GCPRO2 (dir, listfile); |
| 5226 | dir = Ffile_name_directory (listfile); |
| 5227 | if (NILP (Ffile_directory_p (dir))) |
| 5228 | internal_condition_case_1 (do_auto_save_make_dir, |
| 5229 | dir, Fcons (Fcons (Qfile_error, Qnil), Qnil), |
| 5230 | do_auto_save_eh); |
| 5231 | UNGCPRO; |
| 5232 | } |
| 5233 | |
| 5234 | stream = fopen (SDATA (listfile), "w"); |
| 5235 | } |
| 5236 | |
| 5237 | record_unwind_protect (do_auto_save_unwind, |
| 5238 | make_save_value (stream, 0)); |
| 5239 | record_unwind_protect (do_auto_save_unwind_1, |
| 5240 | make_number (minibuffer_auto_raise)); |
| 5241 | minibuffer_auto_raise = 0; |
| 5242 | auto_saving = 1; |
| 5243 | auto_save_error_occurred = 0; |
| 5244 | |
| 5245 | /* On first pass, save all files that don't have handlers. |
| 5246 | On second pass, save all files that do have handlers. |
| 5247 | |
| 5248 | If Emacs is crashing, the handlers may tweak what is causing |
| 5249 | Emacs to crash in the first place, and it would be a shame if |
| 5250 | Emacs failed to autosave perfectly ordinary files because it |
| 5251 | couldn't handle some ange-ftp'd file. */ |
| 5252 | |
| 5253 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
| 5254 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
| 5255 | { |
| 5256 | buf = XCDR (XCAR (tail)); |
| 5257 | b = XBUFFER (buf); |
| 5258 | |
| 5259 | /* Record all the buffers that have auto save mode |
| 5260 | in the special file that lists them. For each of these buffers, |
| 5261 | Record visited name (if any) and auto save name. */ |
| 5262 | if (STRINGP (b->auto_save_file_name) |
| 5263 | && stream != NULL && do_handled_files == 0) |
| 5264 | { |
| 5265 | BLOCK_INPUT; |
| 5266 | if (!NILP (b->filename)) |
| 5267 | { |
| 5268 | fwrite (SDATA (b->filename), 1, |
| 5269 | SBYTES (b->filename), stream); |
| 5270 | } |
| 5271 | putc ('\n', stream); |
| 5272 | fwrite (SDATA (b->auto_save_file_name), 1, |
| 5273 | SBYTES (b->auto_save_file_name), stream); |
| 5274 | putc ('\n', stream); |
| 5275 | UNBLOCK_INPUT; |
| 5276 | } |
| 5277 | |
| 5278 | if (!NILP (current_only) |
| 5279 | && b != current_buffer) |
| 5280 | continue; |
| 5281 | |
| 5282 | /* Don't auto-save indirect buffers. |
| 5283 | The base buffer takes care of it. */ |
| 5284 | if (b->base_buffer) |
| 5285 | continue; |
| 5286 | |
| 5287 | /* Check for auto save enabled |
| 5288 | and file changed since last auto save |
| 5289 | and file changed since last real save. */ |
| 5290 | if (STRINGP (b->auto_save_file_name) |
| 5291 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
| 5292 | && b->auto_save_modified < BUF_MODIFF (b) |
| 5293 | /* -1 means we've turned off autosaving for a while--see below. */ |
| 5294 | && XINT (b->save_length) >= 0 |
| 5295 | && (do_handled_files |
| 5296 | || NILP (Ffind_file_name_handler (b->auto_save_file_name, |
| 5297 | Qwrite_region)))) |
| 5298 | { |
| 5299 | EMACS_TIME before_time, after_time; |
| 5300 | |
| 5301 | EMACS_GET_TIME (before_time); |
| 5302 | |
| 5303 | /* If we had a failure, don't try again for 20 minutes. */ |
| 5304 | if (b->auto_save_failure_time >= 0 |
| 5305 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) |
| 5306 | continue; |
| 5307 | |
| 5308 | if ((XFASTINT (b->save_length) * 10 |
| 5309 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
| 5310 | /* A short file is likely to change a large fraction; |
| 5311 | spare the user annoying messages. */ |
| 5312 | && XFASTINT (b->save_length) > 5000 |
| 5313 | /* These messages are frequent and annoying for `*mail*'. */ |
| 5314 | && !EQ (b->filename, Qnil) |
| 5315 | && NILP (no_message)) |
| 5316 | { |
| 5317 | /* It has shrunk too much; turn off auto-saving here. */ |
| 5318 | minibuffer_auto_raise = orig_minibuffer_auto_raise; |
| 5319 | message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save", |
| 5320 | b->name, 1); |
| 5321 | minibuffer_auto_raise = 0; |
| 5322 | /* Turn off auto-saving until there's a real save, |
| 5323 | and prevent any more warnings. */ |
| 5324 | XSETINT (b->save_length, -1); |
| 5325 | Fsleep_for (make_number (1), Qnil); |
| 5326 | continue; |
| 5327 | } |
| 5328 | set_buffer_internal (b); |
| 5329 | if (!auto_saved && NILP (no_message)) |
| 5330 | message1 ("Auto-saving..."); |
| 5331 | internal_condition_case (auto_save_1, Qt, auto_save_error); |
| 5332 | auto_saved++; |
| 5333 | b->auto_save_modified = BUF_MODIFF (b); |
| 5334 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
| 5335 | set_buffer_internal (old); |
| 5336 | |
| 5337 | EMACS_GET_TIME (after_time); |
| 5338 | |
| 5339 | /* If auto-save took more than 60 seconds, |
| 5340 | assume it was an NFS failure that got a timeout. */ |
| 5341 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) |
| 5342 | b->auto_save_failure_time = EMACS_SECS (after_time); |
| 5343 | } |
| 5344 | } |
| 5345 | |
| 5346 | /* Prevent another auto save till enough input events come in. */ |
| 5347 | record_auto_save (); |
| 5348 | |
| 5349 | if (auto_saved && NILP (no_message)) |
| 5350 | { |
| 5351 | if (old_message_p) |
| 5352 | { |
| 5353 | /* If we are going to restore an old message, |
| 5354 | give time to read ours. */ |
| 5355 | sit_for (make_number (1), 0, 0); |
| 5356 | restore_message (); |
| 5357 | } |
| 5358 | else if (!auto_save_error_occurred) |
| 5359 | /* Don't overwrite the error message if an error occurred. |
| 5360 | If we displayed a message and then restored a state |
| 5361 | with no message, leave a "done" message on the screen. */ |
| 5362 | message1 ("Auto-saving...done"); |
| 5363 | } |
| 5364 | |
| 5365 | Vquit_flag = oquit; |
| 5366 | |
| 5367 | /* This restores the message-stack status. */ |
| 5368 | unbind_to (count, Qnil); |
| 5369 | return Qnil; |
| 5370 | } |
| 5371 | |
| 5372 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, |
| 5373 | Sset_buffer_auto_saved, 0, 0, 0, |
| 5374 | doc: /* Mark current buffer as auto-saved with its current text. |
| 5375 | No auto-save file will be written until the buffer changes again. */) |
| 5376 | () |
| 5377 | { |
| 5378 | current_buffer->auto_save_modified = MODIFF; |
| 5379 | XSETFASTINT (current_buffer->save_length, Z - BEG); |
| 5380 | current_buffer->auto_save_failure_time = -1; |
| 5381 | return Qnil; |
| 5382 | } |
| 5383 | |
| 5384 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, |
| 5385 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
| 5386 | doc: /* Clear any record of a recent auto-save failure in the current buffer. */) |
| 5387 | () |
| 5388 | { |
| 5389 | current_buffer->auto_save_failure_time = -1; |
| 5390 | return Qnil; |
| 5391 | } |
| 5392 | |
| 5393 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, |
| 5394 | 0, 0, 0, |
| 5395 | doc: /* Return t if current buffer has been auto-saved recently. |
| 5396 | More precisely, if it has been auto-saved since last read from or saved |
| 5397 | in the visited file. If the buffer has no visited file, |
| 5398 | then any auto-save counts as "recent". */) |
| 5399 | () |
| 5400 | { |
| 5401 | return (SAVE_MODIFF < current_buffer->auto_save_modified) ? Qt : Qnil; |
| 5402 | } |
| 5403 | \f |
| 5404 | /* Reading and completing file names */ |
| 5405 | |
| 5406 | DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p, |
| 5407 | Snext_read_file_uses_dialog_p, 0, 0, 0, |
| 5408 | doc: /* Return t if a call to `read-file-name' will use a dialog. |
| 5409 | The return value is only relevant for a call to `read-file-name' that happens |
| 5410 | before any other event (mouse or keypress) is handeled. */) |
| 5411 | () |
| 5412 | { |
| 5413 | #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) |
| 5414 | if ((NILP (last_nonmenu_event) || CONSP (last_nonmenu_event)) |
| 5415 | && use_dialog_box |
| 5416 | && use_file_dialog |
| 5417 | && have_menus_p ()) |
| 5418 | return Qt; |
| 5419 | #endif |
| 5420 | return Qnil; |
| 5421 | } |
| 5422 | |
| 5423 | Lisp_Object |
| 5424 | Fread_file_name (prompt, dir, default_filename, mustmatch, initial, predicate) |
| 5425 | Lisp_Object prompt, dir, default_filename, mustmatch, initial, predicate; |
| 5426 | { |
| 5427 | struct gcpro gcpro1, gcpro2; |
| 5428 | Lisp_Object args[7]; |
| 5429 | |
| 5430 | GCPRO1 (default_filename); |
| 5431 | args[0] = intern ("read-file-name"); |
| 5432 | args[1] = prompt; |
| 5433 | args[2] = dir; |
| 5434 | args[3] = default_filename; |
| 5435 | args[4] = mustmatch; |
| 5436 | args[5] = initial; |
| 5437 | args[6] = predicate; |
| 5438 | RETURN_UNGCPRO (Ffuncall (7, args)); |
| 5439 | } |
| 5440 | |
| 5441 | \f |
| 5442 | void |
| 5443 | init_fileio_once () |
| 5444 | { |
| 5445 | /* Must be set before any path manipulation is performed. */ |
| 5446 | XSETFASTINT (Vdirectory_sep_char, '/'); |
| 5447 | } |
| 5448 | |
| 5449 | \f |
| 5450 | void |
| 5451 | syms_of_fileio () |
| 5452 | { |
| 5453 | Qoperations = intern ("operations"); |
| 5454 | Qexpand_file_name = intern ("expand-file-name"); |
| 5455 | Qsubstitute_in_file_name = intern ("substitute-in-file-name"); |
| 5456 | Qdirectory_file_name = intern ("directory-file-name"); |
| 5457 | Qfile_name_directory = intern ("file-name-directory"); |
| 5458 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); |
| 5459 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
| 5460 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
| 5461 | Qcopy_file = intern ("copy-file"); |
| 5462 | Qmake_directory_internal = intern ("make-directory-internal"); |
| 5463 | Qmake_directory = intern ("make-directory"); |
| 5464 | Qdelete_directory = intern ("delete-directory"); |
| 5465 | Qdelete_file = intern ("delete-file"); |
| 5466 | Qrename_file = intern ("rename-file"); |
| 5467 | Qadd_name_to_file = intern ("add-name-to-file"); |
| 5468 | Qmake_symbolic_link = intern ("make-symbolic-link"); |
| 5469 | Qfile_exists_p = intern ("file-exists-p"); |
| 5470 | Qfile_executable_p = intern ("file-executable-p"); |
| 5471 | Qfile_readable_p = intern ("file-readable-p"); |
| 5472 | Qfile_writable_p = intern ("file-writable-p"); |
| 5473 | Qfile_symlink_p = intern ("file-symlink-p"); |
| 5474 | Qaccess_file = intern ("access-file"); |
| 5475 | Qfile_directory_p = intern ("file-directory-p"); |
| 5476 | Qfile_regular_p = intern ("file-regular-p"); |
| 5477 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
| 5478 | Qfile_modes = intern ("file-modes"); |
| 5479 | Qset_file_modes = intern ("set-file-modes"); |
| 5480 | Qset_file_times = intern ("set-file-times"); |
| 5481 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); |
| 5482 | Qinsert_file_contents = intern ("insert-file-contents"); |
| 5483 | Qwrite_region = intern ("write-region"); |
| 5484 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); |
| 5485 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
| 5486 | Qauto_save_coding = intern ("auto-save-coding"); |
| 5487 | |
| 5488 | staticpro (&Qoperations); |
| 5489 | staticpro (&Qexpand_file_name); |
| 5490 | staticpro (&Qsubstitute_in_file_name); |
| 5491 | staticpro (&Qdirectory_file_name); |
| 5492 | staticpro (&Qfile_name_directory); |
| 5493 | staticpro (&Qfile_name_nondirectory); |
| 5494 | staticpro (&Qunhandled_file_name_directory); |
| 5495 | staticpro (&Qfile_name_as_directory); |
| 5496 | staticpro (&Qcopy_file); |
| 5497 | staticpro (&Qmake_directory_internal); |
| 5498 | staticpro (&Qmake_directory); |
| 5499 | staticpro (&Qdelete_directory); |
| 5500 | staticpro (&Qdelete_file); |
| 5501 | staticpro (&Qrename_file); |
| 5502 | staticpro (&Qadd_name_to_file); |
| 5503 | staticpro (&Qmake_symbolic_link); |
| 5504 | staticpro (&Qfile_exists_p); |
| 5505 | staticpro (&Qfile_executable_p); |
| 5506 | staticpro (&Qfile_readable_p); |
| 5507 | staticpro (&Qfile_writable_p); |
| 5508 | staticpro (&Qaccess_file); |
| 5509 | staticpro (&Qfile_symlink_p); |
| 5510 | staticpro (&Qfile_directory_p); |
| 5511 | staticpro (&Qfile_regular_p); |
| 5512 | staticpro (&Qfile_accessible_directory_p); |
| 5513 | staticpro (&Qfile_modes); |
| 5514 | staticpro (&Qset_file_modes); |
| 5515 | staticpro (&Qset_file_times); |
| 5516 | staticpro (&Qfile_newer_than_file_p); |
| 5517 | staticpro (&Qinsert_file_contents); |
| 5518 | staticpro (&Qwrite_region); |
| 5519 | staticpro (&Qverify_visited_file_modtime); |
| 5520 | staticpro (&Qset_visited_file_modtime); |
| 5521 | staticpro (&Qauto_save_coding); |
| 5522 | |
| 5523 | Qfile_name_history = intern ("file-name-history"); |
| 5524 | Fset (Qfile_name_history, Qnil); |
| 5525 | staticpro (&Qfile_name_history); |
| 5526 | |
| 5527 | Qfile_error = intern ("file-error"); |
| 5528 | staticpro (&Qfile_error); |
| 5529 | Qfile_already_exists = intern ("file-already-exists"); |
| 5530 | staticpro (&Qfile_already_exists); |
| 5531 | Qfile_date_error = intern ("file-date-error"); |
| 5532 | staticpro (&Qfile_date_error); |
| 5533 | Qexcl = intern ("excl"); |
| 5534 | staticpro (&Qexcl); |
| 5535 | |
| 5536 | #ifdef DOS_NT |
| 5537 | Qfind_buffer_file_type = intern ("find-buffer-file-type"); |
| 5538 | staticpro (&Qfind_buffer_file_type); |
| 5539 | #endif /* DOS_NT */ |
| 5540 | |
| 5541 | DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system, |
| 5542 | doc: /* *Coding system for encoding file names. |
| 5543 | If it is nil, `default-file-name-coding-system' (which see) is used. */); |
| 5544 | Vfile_name_coding_system = Qnil; |
| 5545 | |
| 5546 | DEFVAR_LISP ("default-file-name-coding-system", |
| 5547 | &Vdefault_file_name_coding_system, |
| 5548 | doc: /* Default coding system for encoding file names. |
| 5549 | This variable is used only when `file-name-coding-system' is nil. |
| 5550 | |
| 5551 | This variable is set/changed by the command `set-language-environment'. |
| 5552 | User should not set this variable manually, |
| 5553 | instead use `file-name-coding-system' to get a constant encoding |
| 5554 | of file names regardless of the current language environment. */); |
| 5555 | Vdefault_file_name_coding_system = Qnil; |
| 5556 | |
| 5557 | Qformat_decode = intern ("format-decode"); |
| 5558 | staticpro (&Qformat_decode); |
| 5559 | Qformat_annotate_function = intern ("format-annotate-function"); |
| 5560 | staticpro (&Qformat_annotate_function); |
| 5561 | Qafter_insert_file_set_coding = intern ("after-insert-file-set-coding"); |
| 5562 | staticpro (&Qafter_insert_file_set_coding); |
| 5563 | |
| 5564 | Qcar_less_than_car = intern ("car-less-than-car"); |
| 5565 | staticpro (&Qcar_less_than_car); |
| 5566 | |
| 5567 | Fput (Qfile_error, Qerror_conditions, |
| 5568 | list2 (Qfile_error, Qerror)); |
| 5569 | Fput (Qfile_error, Qerror_message, |
| 5570 | build_string ("File error")); |
| 5571 | |
| 5572 | Fput (Qfile_already_exists, Qerror_conditions, |
| 5573 | list3 (Qfile_already_exists, Qfile_error, Qerror)); |
| 5574 | Fput (Qfile_already_exists, Qerror_message, |
| 5575 | build_string ("File already exists")); |
| 5576 | |
| 5577 | Fput (Qfile_date_error, Qerror_conditions, |
| 5578 | list3 (Qfile_date_error, Qfile_error, Qerror)); |
| 5579 | Fput (Qfile_date_error, Qerror_message, |
| 5580 | build_string ("Cannot set file date")); |
| 5581 | |
| 5582 | DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char, |
| 5583 | doc: /* Directory separator character for built-in functions that return file names. |
| 5584 | The value is always ?/. Don't use this variable, just use `/'. */); |
| 5585 | |
| 5586 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
| 5587 | doc: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially. |
| 5588 | If a file name matches REGEXP, then all I/O on that file is done by calling |
| 5589 | HANDLER. |
| 5590 | |
| 5591 | The first argument given to HANDLER is the name of the I/O primitive |
| 5592 | to be handled; the remaining arguments are the arguments that were |
| 5593 | passed to that primitive. For example, if you do |
| 5594 | (file-exists-p FILENAME) |
| 5595 | and FILENAME is handled by HANDLER, then HANDLER is called like this: |
| 5596 | (funcall HANDLER 'file-exists-p FILENAME) |
| 5597 | The function `find-file-name-handler' checks this list for a handler |
| 5598 | for its argument. */); |
| 5599 | Vfile_name_handler_alist = Qnil; |
| 5600 | |
| 5601 | DEFVAR_LISP ("set-auto-coding-function", |
| 5602 | &Vset_auto_coding_function, |
| 5603 | doc: /* If non-nil, a function to call to decide a coding system of file. |
| 5604 | Two arguments are passed to this function: the file name |
| 5605 | and the length of a file contents following the point. |
| 5606 | This function should return a coding system to decode the file contents. |
| 5607 | It should check the file name against `auto-coding-alist'. |
| 5608 | If no coding system is decided, it should check a coding system |
| 5609 | specified in the heading lines with the format: |
| 5610 | -*- ... coding: CODING-SYSTEM; ... -*- |
| 5611 | or local variable spec of the tailing lines with `coding:' tag. */); |
| 5612 | Vset_auto_coding_function = Qnil; |
| 5613 | |
| 5614 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
| 5615 | doc: /* A list of functions to be called at the end of `insert-file-contents'. |
| 5616 | Each is passed one argument, the number of characters inserted, |
| 5617 | with point at the start of the inserted text. Each function |
| 5618 | should leave point the same, and return the new character count. |
| 5619 | If `insert-file-contents' is intercepted by a handler from |
| 5620 | `file-name-handler-alist', that handler is responsible for calling the |
| 5621 | functions in `after-insert-file-functions' if appropriate. */); |
| 5622 | Vafter_insert_file_functions = Qnil; |
| 5623 | |
| 5624 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, |
| 5625 | doc: /* A list of functions to be called at the start of `write-region'. |
| 5626 | Each is passed two arguments, START and END as for `write-region'. |
| 5627 | These are usually two numbers but not always; see the documentation |
| 5628 | for `write-region'. The function should return a list of pairs |
| 5629 | of the form (POSITION . STRING), consisting of strings to be effectively |
| 5630 | inserted at the specified positions of the file being written (1 means to |
| 5631 | insert before the first byte written). The POSITIONs must be sorted into |
| 5632 | increasing order. If there are several functions in the list, the several |
| 5633 | lists are merged destructively. Alternatively, the function can return |
| 5634 | with a different buffer current; in that case it should pay attention |
| 5635 | to the annotations returned by previous functions and listed in |
| 5636 | `write-region-annotations-so-far'.*/); |
| 5637 | Vwrite_region_annotate_functions = Qnil; |
| 5638 | staticpro (&Qwrite_region_annotate_functions); |
| 5639 | Qwrite_region_annotate_functions |
| 5640 | = intern ("write-region-annotate-functions"); |
| 5641 | |
| 5642 | DEFVAR_LISP ("write-region-annotations-so-far", |
| 5643 | &Vwrite_region_annotations_so_far, |
| 5644 | doc: /* When an annotation function is called, this holds the previous annotations. |
| 5645 | These are the annotations made by other annotation functions |
| 5646 | that were already called. See also `write-region-annotate-functions'. */); |
| 5647 | Vwrite_region_annotations_so_far = Qnil; |
| 5648 | |
| 5649 | DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers, |
| 5650 | doc: /* A list of file name handlers that temporarily should not be used. |
| 5651 | This applies only to the operation `inhibit-file-name-operation'. */); |
| 5652 | Vinhibit_file_name_handlers = Qnil; |
| 5653 | |
| 5654 | DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation, |
| 5655 | doc: /* The operation for which `inhibit-file-name-handlers' is applicable. */); |
| 5656 | Vinhibit_file_name_operation = Qnil; |
| 5657 | |
| 5658 | DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name, |
| 5659 | doc: /* File name in which we write a list of all auto save file names. |
| 5660 | This variable is initialized automatically from `auto-save-list-file-prefix' |
| 5661 | shortly after Emacs reads your `.emacs' file, if you have not yet given it |
| 5662 | a non-nil value. */); |
| 5663 | Vauto_save_list_file_name = Qnil; |
| 5664 | |
| 5665 | DEFVAR_LISP ("auto-save-visited-file-name", &Vauto_save_visited_file_name, |
| 5666 | doc: /* Non-nil says auto-save a buffer in the file it is visiting, when practical. |
| 5667 | Normally auto-save files are written under other names. */); |
| 5668 | Vauto_save_visited_file_name = Qnil; |
| 5669 | |
| 5670 | #ifdef HAVE_FSYNC |
| 5671 | DEFVAR_BOOL ("write-region-inhibit-fsync", &write_region_inhibit_fsync, |
| 5672 | doc: /* *Non-nil means don't call fsync in `write-region'. |
| 5673 | This variable affects calls to `write-region' as well as save commands. |
| 5674 | A non-nil value may result in data loss! */); |
| 5675 | write_region_inhibit_fsync = 0; |
| 5676 | #endif |
| 5677 | |
| 5678 | DEFVAR_BOOL ("delete-by-moving-to-trash", &delete_by_moving_to_trash, |
| 5679 | doc: /* Specifies whether to use the system's trash can. |
| 5680 | When non-nil, the function `move-file-to-trash' will be used by |
| 5681 | `delete-file' and `delete-directory'. */); |
| 5682 | delete_by_moving_to_trash = 0; |
| 5683 | Qdelete_by_moving_to_trash = intern ("delete-by-moving-to-trash"); |
| 5684 | Qmove_file_to_trash = intern ("move-file-to-trash"); |
| 5685 | staticpro (&Qmove_file_to_trash); |
| 5686 | |
| 5687 | defsubr (&Sfind_file_name_handler); |
| 5688 | defsubr (&Sfile_name_directory); |
| 5689 | defsubr (&Sfile_name_nondirectory); |
| 5690 | defsubr (&Sunhandled_file_name_directory); |
| 5691 | defsubr (&Sfile_name_as_directory); |
| 5692 | defsubr (&Sdirectory_file_name); |
| 5693 | defsubr (&Smake_temp_name); |
| 5694 | defsubr (&Sexpand_file_name); |
| 5695 | defsubr (&Ssubstitute_in_file_name); |
| 5696 | defsubr (&Scopy_file); |
| 5697 | defsubr (&Smake_directory_internal); |
| 5698 | defsubr (&Sdelete_directory); |
| 5699 | defsubr (&Sdelete_file); |
| 5700 | defsubr (&Srename_file); |
| 5701 | defsubr (&Sadd_name_to_file); |
| 5702 | defsubr (&Smake_symbolic_link); |
| 5703 | defsubr (&Sfile_name_absolute_p); |
| 5704 | defsubr (&Sfile_exists_p); |
| 5705 | defsubr (&Sfile_executable_p); |
| 5706 | defsubr (&Sfile_readable_p); |
| 5707 | defsubr (&Sfile_writable_p); |
| 5708 | defsubr (&Saccess_file); |
| 5709 | defsubr (&Sfile_symlink_p); |
| 5710 | defsubr (&Sfile_directory_p); |
| 5711 | defsubr (&Sfile_accessible_directory_p); |
| 5712 | defsubr (&Sfile_regular_p); |
| 5713 | defsubr (&Sfile_modes); |
| 5714 | defsubr (&Sset_file_modes); |
| 5715 | defsubr (&Sset_file_times); |
| 5716 | defsubr (&Sset_default_file_modes); |
| 5717 | defsubr (&Sdefault_file_modes); |
| 5718 | defsubr (&Sfile_newer_than_file_p); |
| 5719 | defsubr (&Sinsert_file_contents); |
| 5720 | defsubr (&Swrite_region); |
| 5721 | defsubr (&Scar_less_than_car); |
| 5722 | defsubr (&Sverify_visited_file_modtime); |
| 5723 | defsubr (&Sclear_visited_file_modtime); |
| 5724 | defsubr (&Svisited_file_modtime); |
| 5725 | defsubr (&Sset_visited_file_modtime); |
| 5726 | defsubr (&Sdo_auto_save); |
| 5727 | defsubr (&Sset_buffer_auto_saved); |
| 5728 | defsubr (&Sclear_buffer_auto_save_failure); |
| 5729 | defsubr (&Srecent_auto_save_p); |
| 5730 | |
| 5731 | defsubr (&Snext_read_file_uses_dialog_p); |
| 5732 | |
| 5733 | #ifdef HAVE_SYNC |
| 5734 | defsubr (&Sunix_sync); |
| 5735 | #endif |
| 5736 | } |
| 5737 | |
| 5738 | /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c |
| 5739 | (do not change this comment) */ |