1 /* mv -- move or rename files
2 Copyright (C) 1986, 1989-1991, 1995-2010 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 3 of the License, or
7 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
17 /* Written by Mike Parker, David MacKenzie, and Jim Meyering */
22 #include <sys/types.h>
24 #include <selinux/selinux.h>
27 #include "backupfile.h"
31 #include "filenamecat.h"
34 #include "root-dev-ino.h"
37 /* The official name of this program (e.g., no `g' prefix). */
38 #define PROGRAM_NAME "mv"
41 proper_name ("Mike Parker"), \
42 proper_name ("David MacKenzie"), \
43 proper_name ("Jim Meyering")
45 /* For long options that have no equivalent short option, use a
46 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
49 STRIP_TRAILING_SLASHES_OPTION = CHAR_MAX + 1
52 /* Remove any trailing slashes from each SOURCE argument. */
53 static bool remove_trailing_slashes;
55 static struct option const long_options[] =
57 {"backup", optional_argument, NULL, 'b'},
58 {"force", no_argument, NULL, 'f'},
59 {"interactive", no_argument, NULL, 'i'},
60 {"no-clobber", no_argument, NULL, 'n'},
61 {"no-target-directory", no_argument, NULL, 'T'},
62 {"strip-trailing-slashes", no_argument, NULL, STRIP_TRAILING_SLASHES_OPTION},
63 {"suffix", required_argument, NULL, 'S'},
64 {"target-directory", required_argument, NULL, 't'},
65 {"update", no_argument, NULL, 'u'},
66 {"verbose", no_argument, NULL, 'v'},
67 {GETOPT_HELP_OPTION_DECL},
68 {GETOPT_VERSION_OPTION_DECL},
73 rm_option_init (struct rm_options *x)
75 x->ignore_missing_files = false;
77 x->one_file_system = false;
79 /* Should we prompt for removal, too? No. Prompting for the `move'
80 part is enough. It implies removal. */
81 x->interactive = RMI_NEVER;
86 /* Since this program may well have to process additional command
87 line arguments after any call to `rm', that function must preserve
88 the initial working directory, in case one of those is a
90 x->require_restore_cwd = true;
93 static struct dev_ino dev_ino_buf;
94 x->root_dev_ino = get_root_dev_ino (&dev_ino_buf);
95 if (x->root_dev_ino == NULL)
96 error (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
102 cp_option_init (struct cp_options *x)
104 bool selinux_enabled = (0 < is_selinux_enabled ());
106 cp_options_default (x);
107 x->copy_as_regular = false; /* FIXME: maybe make this an option */
108 x->reflink_mode = REFLINK_NEVER;
109 x->dereference = DEREF_NEVER;
110 x->unlink_dest_before_opening = false;
111 x->unlink_dest_after_failed_open = false;
112 x->hard_link = false;
113 x->interactive = I_UNSPECIFIED;
115 x->one_file_system = false;
116 x->preserve_ownership = true;
117 x->preserve_links = true;
118 x->preserve_mode = true;
119 x->preserve_timestamps = true;
120 x->preserve_security_context = selinux_enabled;
121 x->reduce_diagnostics = false;
122 x->require_preserve = false; /* FIXME: maybe make this an option */
123 x->require_preserve_context = false;
124 x->preserve_xattr = true;
125 x->require_preserve_xattr = false;
127 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
128 x->symbolic_link = false;
131 x->stdin_tty = isatty (STDIN_FILENO);
133 x->open_dangling_dest_symlink = false;
140 /* FILE is the last operand of this command. Return true if FILE is a
141 directory. But report an error if there is a problem accessing FILE, other
142 than nonexistence (errno == ENOENT). */
145 target_directory_operand (char const *file)
148 int err = (stat (file, &st) == 0 ? 0 : errno);
149 bool is_a_dir = !err && S_ISDIR (st.st_mode);
150 if (err && err != ENOENT)
151 error (EXIT_FAILURE, err, _("accessing %s"), quote (file));
155 /* Move SOURCE onto DEST. Handles cross-file-system moves.
156 If SOURCE is a directory, DEST must not exist.
157 Return true if successful. */
160 do_move (const char *source, const char *dest, const struct cp_options *x)
163 bool rename_succeeded;
164 bool ok = copy (source, dest, false, x, ©_into_self, &rename_succeeded);
168 char const *dir_to_remove;
171 /* In general, when copy returns with copy_into_self set, SOURCE is
172 the same as, or a parent of DEST. In this case we know it's a
173 parent. It doesn't make sense to move a directory into itself, and
174 besides in some situations doing so would give highly nonintuitive
175 results. Run this `mkdir b; touch a c; mv * b' in an empty
176 directory. Here's the result of running echo `find b -print`:
177 b b/a b/b b/b/a b/c. Notice that only file `a' was copied
178 into b/b. Handle this by giving a diagnostic, removing the
179 copied-into-self directory, DEST (`b/b' in the example),
182 dir_to_remove = NULL;
185 else if (rename_succeeded)
187 /* No need to remove anything. SOURCE was successfully
188 renamed to DEST. Or the user declined to rename a file. */
189 dir_to_remove = NULL;
193 /* This may mean SOURCE and DEST referred to different devices.
194 It may also conceivably mean that even though they referred
195 to the same device, rename wasn't implemented for that device.
197 E.g., (from Joel N. Weber),
198 [...] there might someday be cases where you can't rename
199 but you can copy where the device name is the same, especially
200 on Hurd. Consider an ftpfs with a primitive ftp server that
201 supports uploading, downloading and deleting, but not renaming.
203 Also, note that comparing device numbers is not a reliable
204 check for `can-rename'. Some systems can be set up so that
205 files from many different physical devices all have the same
206 st_dev field. This is a feature of some NFS mounting
209 We reach this point if SOURCE has been successfully copied
210 to DEST. Now we have to remove SOURCE.
212 This function used to resort to copying only when rename
213 failed and set errno to EXDEV. */
215 dir_to_remove = source;
218 if (dir_to_remove != NULL)
220 struct rm_options rm_options;
221 enum RM_status status;
224 rm_option_init (&rm_options);
225 rm_options.verbose = x->verbose;
226 dir[0] = dir_to_remove;
229 status = rm ((void*) dir, &rm_options);
230 assert (VALID_STATUS (status));
231 if (status == RM_ERROR)
239 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
240 Treat DEST as a directory if DEST_IS_DIR.
241 Return true if successful. */
244 movefile (char *source, char *dest, bool dest_is_dir,
245 const struct cp_options *x)
249 /* This code was introduced to handle the ambiguity in the semantics
250 of mv that is induced by the varying semantics of the rename function.
251 Some systems (e.g., GNU/Linux) have a rename function that honors a
252 trailing slash, while others (like Solaris 5,6,7) have a rename
253 function that ignores a trailing slash. I believe the GNU/Linux
254 rename semantics are POSIX and susv2 compliant. */
256 if (remove_trailing_slashes)
257 strip_trailing_slashes (source);
261 /* Treat DEST as a directory; build the full filename. */
262 char const *src_basename = last_component (source);
263 char *new_dest = file_name_concat (dest, src_basename, NULL);
264 strip_trailing_slashes (new_dest);
265 ok = do_move (source, new_dest, x);
270 ok = do_move (source, dest, x);
279 if (status != EXIT_SUCCESS)
280 fprintf (stderr, _("Try `%s --help' for more information.\n"),
285 Usage: %s [OPTION]... [-T] SOURCE DEST\n\
286 or: %s [OPTION]... SOURCE... DIRECTORY\n\
287 or: %s [OPTION]... -t DIRECTORY SOURCE...\n\
289 program_name, program_name, program_name);
291 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
295 Mandatory arguments to long options are mandatory for short options too.\n\
298 --backup[=CONTROL] make a backup of each existing destination file\n\
299 -b like --backup but does not accept an argument\n\
300 -f, --force do not prompt before overwriting\n\
301 -i, --interactive prompt before overwrite\n\
302 -n, --no-clobber do not overwrite an existing file\n\
303 If you specify more than one of -i, -f, -n, only the final one takes effect.\n\
306 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
308 -S, --suffix=SUFFIX override the usual backup suffix\n\
311 -t, --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
312 -T, --no-target-directory treat DEST as a normal file\n\
313 -u, --update move only when the SOURCE file is newer\n\
314 than the destination file or when the\n\
315 destination file is missing\n\
316 -v, --verbose explain what is being done\n\
318 fputs (HELP_OPTION_DESCRIPTION, stdout);
319 fputs (VERSION_OPTION_DESCRIPTION, stdout);
322 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
323 The version control method may be selected via the --backup option or through\n\
324 the VERSION_CONTROL environment variable. Here are the values:\n\
328 none, off never make backups (even if --backup is given)\n\
329 numbered, t make numbered backups\n\
330 existing, nil numbered if numbered backups exist, simple otherwise\n\
331 simple, never always make simple backups\n\
333 emit_ancillary_info ();
339 main (int argc, char **argv)
343 bool make_backups = false;
344 char *backup_suffix_string;
345 char *version_control_string = NULL;
347 char *target_directory = NULL;
348 bool no_target_directory = false;
352 initialize_main (&argc, &argv);
353 set_program_name (argv[0]);
354 setlocale (LC_ALL, "");
355 bindtextdomain (PACKAGE, LOCALEDIR);
356 textdomain (PACKAGE);
358 atexit (close_stdin);
362 /* Try to disable the ability to unlink a directory. */
363 priv_set_remove_linkdir ();
365 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
366 we'll actually use backup_suffix_string. */
367 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
369 while ((c = getopt_long (argc, argv, "bfint:uvS:T", long_options, NULL))
377 version_control_string = optarg;
380 x.interactive = I_ALWAYS_YES;
383 x.interactive = I_ASK_USER;
386 x.interactive = I_ALWAYS_NO;
388 case STRIP_TRAILING_SLASHES_OPTION:
389 remove_trailing_slashes = true;
392 if (target_directory)
393 error (EXIT_FAILURE, 0, _("multiple target directories specified"));
397 if (stat (optarg, &st) != 0)
398 error (EXIT_FAILURE, errno, _("accessing %s"), quote (optarg));
399 if (! S_ISDIR (st.st_mode))
400 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
403 target_directory = optarg;
406 no_target_directory = true;
416 backup_suffix_string = optarg;
418 case_GETOPT_HELP_CHAR;
419 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
421 usage (EXIT_FAILURE);
425 n_files = argc - optind;
426 file = argv + optind;
428 if (n_files <= !target_directory)
431 error (0, 0, _("missing file operand"));
433 error (0, 0, _("missing destination file operand after %s"),
435 usage (EXIT_FAILURE);
438 if (no_target_directory)
440 if (target_directory)
441 error (EXIT_FAILURE, 0,
442 _("cannot combine --target-directory (-t) "
443 "and --no-target-directory (-T)"));
446 error (0, 0, _("extra operand %s"), quote (file[2]));
447 usage (EXIT_FAILURE);
450 else if (!target_directory)
452 assert (2 <= n_files);
453 if (target_directory_operand (file[n_files - 1]))
454 target_directory = file[--n_files];
455 else if (2 < n_files)
456 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
457 quote (file[n_files - 1]));
460 if (make_backups && x.interactive == I_ALWAYS_NO)
463 _("options --backup and --no-clobber are mutually exclusive"));
464 usage (EXIT_FAILURE);
467 if (backup_suffix_string)
468 simple_backup_suffix = xstrdup (backup_suffix_string);
470 x.backup_type = (make_backups
471 ? xget_version (_("backup type"),
472 version_control_string)
477 if (target_directory)
481 /* Initialize the hash table only if we'll need it.
482 The problem it is used to detect can arise only if there are
483 two or more files to move. */
488 for (i = 0; i < n_files; ++i)
489 ok &= movefile (file[i], target_directory, true, &x);
492 ok = movefile (file[0], file[1], false, &x);
494 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);