1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 1995-2007 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>
28 #include "backupfile.h"
32 #include "filenamecat.h"
35 #include "root-dev-ino.h"
37 /* The official name of this program (e.g., no `g' prefix). */
38 #define PROGRAM_NAME "mv"
40 #define AUTHORS "Mike Parker", "David MacKenzie", "Jim Meyering"
42 /* Initial number of entries in each hash table entry's table of inodes. */
43 #define INITIAL_HASH_MODULE 100
45 /* Initial number of entries in the inode hash table. */
46 #define INITIAL_ENTRY_TAB_SIZE 70
48 /* For long options that have no equivalent short option, use a
49 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
52 REPLY_OPTION = CHAR_MAX + 1,
53 STRIP_TRAILING_SLASHES_OPTION
56 /* The name this program was run with. */
59 /* Remove any trailing slashes from each SOURCE argument. */
60 static bool remove_trailing_slashes;
62 /* Valid arguments to the `--reply' option. */
63 static char const* const reply_args[] =
65 "yes", "no", "query", NULL
68 /* The values that correspond to the above strings. */
69 static int const reply_vals[] =
71 I_ALWAYS_YES, I_ALWAYS_NO, I_ASK_USER
74 static struct option const long_options[] =
76 {"backup", optional_argument, NULL, 'b'},
77 {"force", no_argument, NULL, 'f'},
78 {"interactive", no_argument, NULL, 'i'},
79 {"no-target-directory", no_argument, NULL, 'T'},
80 {"reply", required_argument, NULL, REPLY_OPTION}, /* Deprecated 2005-07-03,
82 {"strip-trailing-slashes", no_argument, NULL, STRIP_TRAILING_SLASHES_OPTION},
83 {"suffix", required_argument, NULL, 'S'},
84 {"target-directory", required_argument, NULL, 't'},
85 {"update", no_argument, NULL, 'u'},
86 {"verbose", no_argument, NULL, 'v'},
87 {GETOPT_HELP_OPTION_DECL},
88 {GETOPT_VERSION_OPTION_DECL},
93 rm_option_init (struct rm_options *x)
95 x->ignore_missing_files = false;
97 x->one_file_system = false;
99 /* Should we prompt for removal, too? No. Prompting for the `move'
100 part is enough. It implies removal. */
101 x->interactive = RMI_NEVER;
102 x->stdin_tty = false;
106 /* Since this program may well have to process additional command
107 line arguments after any call to `rm', that function must preserve
108 the initial working directory, in case one of those is a
109 `.'-relative name. */
110 x->require_restore_cwd = true;
113 static struct dev_ino dev_ino_buf;
114 x->root_dev_ino = get_root_dev_ino (&dev_ino_buf);
115 if (x->root_dev_ino == NULL)
116 error (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
122 cp_option_init (struct cp_options *x)
124 bool selinux_enabled = (0 < is_selinux_enabled ());
126 x->copy_as_regular = false; /* FIXME: maybe make this an option */
127 x->dereference = DEREF_NEVER;
128 x->unlink_dest_before_opening = false;
129 x->unlink_dest_after_failed_open = false;
130 x->hard_link = false;
131 x->interactive = I_UNSPECIFIED;
133 x->chown_privileges = chown_privileges ();
134 x->one_file_system = false;
135 x->preserve_ownership = true;
136 x->preserve_links = true;
137 x->preserve_mode = true;
138 x->preserve_timestamps = true;
139 x->preserve_security_context = selinux_enabled;
140 x->require_preserve = false; /* FIXME: maybe make this an option */
141 x->require_preserve_context = false;
143 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
144 x->symbolic_link = false;
147 x->stdin_tty = isatty (STDIN_FILENO);
149 x->open_dangling_dest_symlink = false;
156 /* FILE is the last operand of this command. Return true if FILE is a
157 directory. But report an error if there is a problem accessing FILE, other
158 than nonexistence (errno == ENOENT). */
161 target_directory_operand (char const *file)
164 int err = (stat (file, &st) == 0 ? 0 : errno);
165 bool is_a_dir = !err && S_ISDIR (st.st_mode);
166 if (err && err != ENOENT)
167 error (EXIT_FAILURE, err, _("accessing %s"), quote (file));
171 /* Move SOURCE onto DEST. Handles cross-file-system moves.
172 If SOURCE is a directory, DEST must not exist.
173 Return true if successful. */
176 do_move (const char *source, const char *dest, const struct cp_options *x)
179 bool rename_succeeded;
180 bool ok = copy (source, dest, false, x, ©_into_self, &rename_succeeded);
184 char const *dir_to_remove;
187 /* In general, when copy returns with copy_into_self set, SOURCE is
188 the same as, or a parent of DEST. In this case we know it's a
189 parent. It doesn't make sense to move a directory into itself, and
190 besides in some situations doing so would give highly nonintuitive
191 results. Run this `mkdir b; touch a c; mv * b' in an empty
192 directory. Here's the result of running echo `find b -print`:
193 b b/a b/b b/b/a b/c. Notice that only file `a' was copied
194 into b/b. Handle this by giving a diagnostic, removing the
195 copied-into-self directory, DEST (`b/b' in the example),
198 dir_to_remove = NULL;
201 else if (rename_succeeded)
203 /* No need to remove anything. SOURCE was successfully
204 renamed to DEST. Or the user declined to rename a file. */
205 dir_to_remove = NULL;
209 /* This may mean SOURCE and DEST referred to different devices.
210 It may also conceivably mean that even though they referred
211 to the same device, rename wasn't implemented for that device.
213 E.g., (from Joel N. Weber),
214 [...] there might someday be cases where you can't rename
215 but you can copy where the device name is the same, especially
216 on Hurd. Consider an ftpfs with a primitive ftp server that
217 supports uploading, downloading and deleting, but not renaming.
219 Also, note that comparing device numbers is not a reliable
220 check for `can-rename'. Some systems can be set up so that
221 files from many different physical devices all have the same
222 st_dev field. This is a feature of some NFS mounting
225 We reach this point if SOURCE has been successfully copied
226 to DEST. Now we have to remove SOURCE.
228 This function used to resort to copying only when rename
229 failed and set errno to EXDEV. */
231 dir_to_remove = source;
234 if (dir_to_remove != NULL)
236 struct rm_options rm_options;
237 enum RM_status status;
239 rm_option_init (&rm_options);
240 rm_options.verbose = x->verbose;
242 status = rm (1, &dir_to_remove, &rm_options);
243 assert (VALID_STATUS (status));
244 if (status == RM_ERROR)
252 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
253 Treat DEST as a directory if DEST_IS_DIR.
254 Return true if successful. */
257 movefile (char *source, char *dest, bool dest_is_dir,
258 const struct cp_options *x)
262 /* This code was introduced to handle the ambiguity in the semantics
263 of mv that is induced by the varying semantics of the rename function.
264 Some systems (e.g., Linux) have a rename function that honors a
265 trailing slash, while others (like Solaris 5,6,7) have a rename
266 function that ignores a trailing slash. I believe the Linux
267 rename semantics are POSIX and susv2 compliant. */
269 if (remove_trailing_slashes)
270 strip_trailing_slashes (source);
274 /* Treat DEST as a directory; build the full filename. */
275 char const *src_basename = last_component (source);
276 char *new_dest = file_name_concat (dest, src_basename, NULL);
277 strip_trailing_slashes (new_dest);
278 ok = do_move (source, new_dest, x);
283 ok = do_move (source, dest, x);
292 if (status != EXIT_SUCCESS)
293 fprintf (stderr, _("Try `%s --help' for more information.\n"),
298 Usage: %s [OPTION]... [-T] SOURCE DEST\n\
299 or: %s [OPTION]... SOURCE... DIRECTORY\n\
300 or: %s [OPTION]... -t DIRECTORY SOURCE...\n\
302 program_name, program_name, program_name);
304 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
308 Mandatory arguments to long options are mandatory for short options too.\n\
311 --backup[=CONTROL] make a backup of each existing destination file\n\
312 -b like --backup but does not accept an argument\n\
313 -f, --force do not prompt before overwriting\n\
314 -i, --interactive prompt before overwrite\n\
317 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
319 -S, --suffix=SUFFIX override the usual backup suffix\n\
322 -t, --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
323 -T, --no-target-directory treat DEST as a normal file\n\
324 -u, --update move only when the SOURCE file is newer\n\
325 than the destination file or when the\n\
326 destination file is missing\n\
327 -v, --verbose explain what is being done\n\
329 fputs (HELP_OPTION_DESCRIPTION, stdout);
330 fputs (VERSION_OPTION_DESCRIPTION, stdout);
333 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
334 The version control method may be selected via the --backup option or through\n\
335 the VERSION_CONTROL environment variable. Here are the values:\n\
339 none, off never make backups (even if --backup is given)\n\
340 numbered, t make numbered backups\n\
341 existing, nil numbered if numbered backups exist, simple otherwise\n\
342 simple, never always make simple backups\n\
344 emit_bug_reporting_address ();
350 main (int argc, char **argv)
354 bool make_backups = false;
355 char *backup_suffix_string;
356 char *version_control_string = NULL;
358 char *target_directory = NULL;
359 bool no_target_directory = false;
363 initialize_main (&argc, &argv);
364 program_name = argv[0];
365 setlocale (LC_ALL, "");
366 bindtextdomain (PACKAGE, LOCALEDIR);
367 textdomain (PACKAGE);
369 atexit (close_stdin);
373 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
374 we'll actually use backup_suffix_string. */
375 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
377 while ((c = getopt_long (argc, argv, "bfit:uvS:T", long_options, NULL))
385 version_control_string = optarg;
388 x.interactive = I_ALWAYS_YES;
391 x.interactive = I_ASK_USER;
393 case REPLY_OPTION: /* Deprecated */
394 x.interactive = XARGMATCH ("--reply", optarg,
395 reply_args, reply_vals);
397 _("the --reply option is deprecated; use -i or -f instead"));
399 case STRIP_TRAILING_SLASHES_OPTION:
400 remove_trailing_slashes = true;
403 if (target_directory)
404 error (EXIT_FAILURE, 0, _("multiple target directories specified"));
408 if (stat (optarg, &st) != 0)
409 error (EXIT_FAILURE, errno, _("accessing %s"), quote (optarg));
410 if (! S_ISDIR (st.st_mode))
411 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
414 target_directory = optarg;
417 no_target_directory = true;
427 backup_suffix_string = optarg;
429 case_GETOPT_HELP_CHAR;
430 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
432 usage (EXIT_FAILURE);
436 n_files = argc - optind;
437 file = argv + optind;
439 if (n_files <= !target_directory)
442 error (0, 0, _("missing file operand"));
444 error (0, 0, _("missing destination file operand after %s"),
446 usage (EXIT_FAILURE);
449 if (no_target_directory)
451 if (target_directory)
452 error (EXIT_FAILURE, 0,
453 _("Cannot combine --target-directory (-t) "
454 "and --no-target-directory (-T)"));
457 error (0, 0, _("extra operand %s"), quote (file[2]));
458 usage (EXIT_FAILURE);
461 else if (!target_directory)
463 assert (2 <= n_files);
464 if (target_directory_operand (file[n_files - 1]))
465 target_directory = file[--n_files];
466 else if (2 < n_files)
467 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
468 quote (file[n_files - 1]));
471 if (backup_suffix_string)
472 simple_backup_suffix = xstrdup (backup_suffix_string);
474 x.backup_type = (make_backups
475 ? xget_version (_("backup type"),
476 version_control_string)
481 if (target_directory)
485 /* Initialize the hash table only if we'll need it.
486 The problem it is used to detect can arise only if there are
487 two or more files to move. */
492 for (i = 0; i < n_files; ++i)
493 ok &= movefile (file[i], target_directory, true, &x);
496 ok = movefile (file[0], file[1], false, &x);
498 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);