1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 1995-2000 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19 -f, --force Assume a 'y' answer to all questions it would
20 normally ask, and not ask the questions.
22 -i, --interactive Require confirmation from the user before
23 performing any move that would destroy an
26 -u, --update Do not move a nondirectory that has an
27 existing destination with the same or newer
30 -v, --verbose List the name of each file as it is moved, and
31 the name it is moved to.
38 Written by Mike Parker, David MacKenzie, and Jim Meyering */
47 #include <sys/types.h>
51 #include "backupfile.h"
55 #include "path-concat.h"
59 /* The official name of this program (e.g., no `g' prefix). */
60 #define PROGRAM_NAME "mv"
62 #define AUTHORS "Mike Parker, David MacKenzie, and Jim Meyering"
64 /* Initial number of entries in each hash table entry's table of inodes. */
65 #define INITIAL_HASH_MODULE 100
67 /* Initial number of entries in the inode hash table. */
68 #define INITIAL_ENTRY_TAB_SIZE 70
70 /* For long options that have no equivalent short option, use a
71 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
74 TARGET_DIRECTORY_OPTION = CHAR_MAX + 1,
75 STRIP_TRAILING_SLASHES_OPTION
84 /* The name this program was run with. */
87 /* Remove any trailing slashes from each SOURCE argument. */
88 static int remove_trailing_slashes;
90 static struct option const long_options[] =
92 {"backup", optional_argument, NULL, 'b'},
93 {"force", no_argument, NULL, 'f'},
94 {"interactive", no_argument, NULL, 'i'},
95 {"strip-trailing-slash", no_argument, NULL, STRIP_TRAILING_SLASHES_OPTION},
96 {"suffix", required_argument, NULL, 'S'},
97 {"target-directory", required_argument, NULL, TARGET_DIRECTORY_OPTION},
98 {"update", no_argument, NULL, 'u'},
99 {"verbose", no_argument, NULL, 'v'},
100 {"version-control", required_argument, NULL, 'V'},
101 {GETOPT_HELP_OPTION_DECL},
102 {GETOPT_VERSION_OPTION_DECL},
107 rm_option_init (struct rm_options *x)
111 /* FIXME: maybe this should be 1. The POSIX spec doesn't specify. */
112 x->ignore_missing_files = 0;
116 /* Should we prompt for removal, too? No. Prompting for the `move'
117 part is enough. It implies removal. */
125 cp_option_init (struct cp_options *x)
127 x->copy_as_regular = 0; /* FIXME: maybe make this an option */
130 x->failed_unlink_is_fatal = 1;
134 x->myeuid = geteuid ();
135 x->one_file_system = 0;
136 x->preserve_owner_and_group = 1;
137 x->preserve_chmod_bits = 1;
138 x->preserve_timestamps = 1;
139 x->require_preserve = 0; /* FIXME: maybe make this an option */
141 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
142 x->symbolic_link = 0;
146 /* Find out the current file creation mask, to knock the right bits
147 when using chmod. The creation mask is set to be liberal, so
148 that created directories can be written, even if it would not
149 have been allowed with the mask this process was started with. */
150 x->umask_kill = ~ umask (0);
157 /* If PATH is an existing directory, return nonzero, else 0. */
160 is_real_dir (const char *path)
164 return lstat (path, &stats) == 0 && S_ISDIR (stats.st_mode);
167 /* Move SOURCE onto DEST. Handles cross-filesystem moves.
168 If SOURCE is a directory, DEST must not exist.
169 Return 0 if successful, non-zero if an error occurred. */
172 do_move (const char *source, const char *dest, const struct cp_options *x)
174 static int first = 1;
176 int rename_succeeded;
183 /* Allocate space for remembering copied and created files. */
184 hash_init (INITIAL_HASH_MODULE, INITIAL_ENTRY_TAB_SIZE);
187 fail = copy (source, dest, 0, x, ©_into_self, &rename_succeeded);
191 const char *dir_to_remove;
194 /* In general, when copy returns with copy_into_self set, SOURCE is
195 the same as, or a parent of DEST. In this case we know it's a
196 parent. It doesn't make sense to move a directory into itself, and
197 besides in some situations doing so would give highly nonintuitive
198 results. Run this `mkdir b; touch a c; mv * b' in an empty
199 directory. Here's the result of running echo `find b -print`:
200 b b/a b/b b/b/a b/c. Notice that only file `a' was copied
201 into b/b. Handle this by giving a diagnostic, removing the
202 copied-into-self directory, DEST (`b/b' in the example),
205 dir_to_remove = NULL;
207 _("cannot move %s to a subdirectory of itself, %s"),
208 quote_n (0, source), quote_n (1, dest));
210 else if (rename_succeeded)
212 /* No need to remove anything. SOURCE was successfully
214 dir_to_remove = NULL;
218 /* This may mean SOURCE and DEST referred to different devices.
219 It may also conceivably mean that even though they referred
220 to the same device, rename wasn't implemented for that device.
222 E.g., (from Joel N. Weber),
223 [...] there might someday be cases where you can't rename
224 but you can copy where the device name is the same, especially
225 on Hurd. Consider an ftpfs with a primitive ftp server that
226 supports uploading, downloading and deleting, but not renaming.
228 Also, note that comparing device numbers is not a reliable
229 check for `can-rename'. Some systems can be set up so that
230 files from many different physical devices all have the same
231 st_dev field. This is a feature of some NFS mounting
234 We reach this point if SOURCE has been successfully copied
235 to DEST. Now we have to remove SOURCE.
237 This function used to resort to copying only when rename
238 failed and set errno to EXDEV. */
240 dir_to_remove = source;
243 if (dir_to_remove != NULL)
245 struct rm_options rm_options;
247 enum RM_status status;
249 rm_option_init (&rm_options);
250 rm_options.verbose = x->verbose;
254 fspec_init_file (&fs, dir_to_remove);
255 status = rm (&fs, 1, &rm_options);
256 assert (VALID_STATUS (status));
257 if (status == RM_ERROR)
263 error (0, errno, _("cannot remove %s"), quote (dir_to_remove));
274 strip_trailing_slashes_2 (char *path)
276 char *end_p = path + strlen (path) - 1;
279 while (slash > path && *slash == '/')
282 return slash < end_p;
285 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
286 DEST_IS_DIR must be nonzero when DEST is a directory or a symlink to a
287 directory and zero otherwise.
288 Return 0 if successful, non-zero if an error occurred. */
291 movefile (char *source, char *dest, int dest_is_dir,
292 const struct cp_options *x)
294 int dest_had_trailing_slash = strip_trailing_slashes_2 (dest);
297 /* This code was introduced to handle the ambiguity in the semantics
298 of mv that is induced by the varying semantics of the rename function.
299 Some systems (e.g., Linux) have a rename function that honors a
300 trailing slash, while others (like Solaris 5,6,7) have a rename
301 function that ignores a trailing slash. I believe the Linux
302 rename semantics are POSIX and susv2 compliant. */
304 if (remove_trailing_slashes)
305 strip_trailing_slashes_2 (source);
307 /* In addition to when DEST is a directory, if DEST has a trailing
308 slash and neither SOURCE nor DEST is a directory, presume the target
309 is DEST/`basename source`. This converts `mv x y/' to `mv x y/x'.
310 This change means that the command `mv any file/' will now fail
311 rather than performing the move. The case when SOURCE is a
312 directory and DEST is not is properly diagnosed by do_move. */
314 if (dest_is_dir || (dest_had_trailing_slash && !is_real_dir (source)))
316 /* DEST is a directory; build full target filename. */
320 /* Remove trailing slashes before taking base_name.
321 Otherwise, base_name ("a/") returns "". */
322 strip_trailing_slashes_2 (source);
324 src_basename = base_name (source);
325 new_dest = path_concat (dest, src_basename, NULL);
326 if (new_dest == NULL)
327 error (1, 0, _("virtual memory exhausted"));
328 fail = do_move (source, new_dest, x);
330 /* Do not free new_dest. It may have been squirreled away by
331 the remember_copied function. */
335 fail = do_move (source, dest, x);
345 fprintf (stderr, _("Try `%s --help' for more information.\n"),
350 Usage: %s [OPTION]... SOURCE DEST\n\
351 or: %s [OPTION]... SOURCE... DIRECTORY\n\
352 or: %s [OPTION]... --target-directory=DIRECTORY SOURCE...\n\
354 program_name, program_name, program_name);
356 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
358 --backup[=CONTROL] make a backup of each existing destination file\n\
359 -b like --backup but does not accept an argument\n\
360 -f, --force remove existing destinations, never prompt\n\
361 -i, --interactive prompt before overwrite\n\
362 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
364 -S, --suffix=SUFFIX override the usual backup suffix\n\
365 --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
366 -u, --update move only older or brand new non-directories\n\
367 -v, --verbose explain what is being done\n\
368 --help display this help and exit\n\
369 --version output version information and exit\n\
373 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
374 The version control method may be selected via the --backup option or through\n\
375 the VERSION_CONTROL environment variable. Here are the values:\n\
377 none, off never make backups (even if --backup is given)\n\
378 numbered, t make numbered backups\n\
379 existing, nil numbered if numbered backups exist, simple otherwise\n\
380 simple, never always make simple backups\n\
382 puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
388 main (int argc, char **argv)
392 int make_backups = 0;
394 char *backup_suffix_string;
395 char *version_control_string = NULL;
397 char *target_directory = NULL;
398 int target_directory_specified;
399 unsigned int n_files;
402 program_name = argv[0];
403 setlocale (LC_ALL, "");
404 bindtextdomain (PACKAGE, LOCALEDIR);
405 textdomain (PACKAGE);
407 atexit (close_stdout);
411 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
412 we'll actually use backup_suffix_string. */
413 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
417 while ((c = getopt_long (argc, argv, "bfiuvS:V:", long_options, NULL)) != -1)
424 case 'V': /* FIXME: this is deprecated. Remove it in 2001. */
426 _("warning: --version-control (-V) is obsolete; support for\
427 it\nwill be removed in some future release. Use --backup=%s instead."
434 version_control_string = optarg;
444 case STRIP_TRAILING_SLASHES_OPTION:
445 remove_trailing_slashes = 1;
447 case TARGET_DIRECTORY_OPTION:
448 target_directory = optarg;
458 backup_suffix_string = optarg;
460 case_GETOPT_HELP_CHAR;
461 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
467 n_files = argc - optind;
468 file = argv + optind;
470 target_directory_specified = (target_directory != NULL);
471 if (target_directory == NULL && n_files != 0)
472 target_directory = file[n_files - 1];
474 dest_is_dir = (n_files > 0 && isdir (target_directory));
476 if (n_files == 0 || (n_files == 1 && !target_directory_specified))
478 error (0, 0, _("missing file argument"));
482 if (target_directory_specified)
486 error (0, 0, _("specified target, %s is not a directory"),
487 quote (target_directory));
491 else if (n_files > 2 && !dest_is_dir)
494 _("when moving multiple files, last argument must be a directory"));
498 if (backup_suffix_string)
499 simple_backup_suffix = xstrdup (backup_suffix_string);
501 x.backup_type = (make_backups
502 ? xget_version (_("backup type"),
503 version_control_string)
506 /* Move each arg but the last into the target_directory. */
508 unsigned int last_file_idx = (target_directory_specified
512 for (i = 0; i <= last_file_idx; ++i)
513 errors |= movefile (file[i], target_directory, dest_is_dir, &x);