1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 1995-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Mike Parker, David MacKenzie, and Jim Meyering */
23 #include <sys/types.h>
28 #include "backupfile.h"
33 #include "filenamecat.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->unlink_dirs = false;
96 x->ignore_missing_files = false;
97 x->root_dev_ino = NULL;
100 /* Should we prompt for removal, too? No. Prompting for the `move'
101 part is enough. It implies removal. */
103 x->stdin_tty = false;
107 /* Since this program may well have to process additional command
108 line arguments after any call to `rm', that function must preserve
109 the initial working directory, in case one of those is a
110 `.'-relative name. */
111 x->require_restore_cwd = true;
115 cp_option_init (struct cp_options *x)
117 x->copy_as_regular = false; /* FIXME: maybe make this an option */
118 x->dereference = DEREF_NEVER;
119 x->unlink_dest_before_opening = false;
120 x->unlink_dest_after_failed_open = false;
121 x->hard_link = false;
122 x->interactive = I_UNSPECIFIED;
124 x->chown_privileges = chown_privileges ();
125 x->one_file_system = false;
126 x->preserve_ownership = true;
127 x->preserve_links = true;
128 x->preserve_mode = true;
129 x->preserve_timestamps = true;
130 x->require_preserve = false; /* FIXME: maybe make this an option */
132 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
133 x->symbolic_link = false;
136 x->stdin_tty = isatty (STDIN_FILENO);
138 /* Find out the current file creation mask, to knock the right bits
139 when using chmod. The creation mask is set to be liberal, so
140 that created directories can be written, even if it would not
141 have been allowed with the mask this process was started with. */
142 x->umask_kill = ~ umask (0);
150 /* FILE is the last operand of this command. Return true if FILE is a
151 directory. But report an error there is a problem accessing FILE,
152 or if FILE does not exist but would have to refer to an existing
153 directory if it referred to anything at all. */
156 target_directory_operand (char const *file)
158 char const *b = base_name (file);
159 size_t blen = strlen (b);
160 bool looks_like_a_dir = (blen == 0 || ISSLASH (b[blen - 1]));
162 int err = (stat (file, &st) == 0 ? 0 : errno);
163 bool is_a_dir = !err && S_ISDIR (st.st_mode);
164 if (err && err != ENOENT)
165 error (EXIT_FAILURE, err, _("accessing %s"), quote (file));
166 if (is_a_dir < looks_like_a_dir)
167 error (EXIT_FAILURE, err, _("target %s is not a directory"), 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 strip_trailing_slashes (dest);
270 if (remove_trailing_slashes)
271 strip_trailing_slashes (source);
275 /* Treat DEST as a directory; build the full filename. */
276 char const *src_basename = base_name (source);
277 char *new_dest = file_name_concat (dest, src_basename, NULL);
278 strip_trailing_slashes (new_dest);
279 ok = do_move (source, new_dest, x);
284 ok = do_move (source, dest, x);
293 if (status != EXIT_SUCCESS)
294 fprintf (stderr, _("Try `%s --help' for more information.\n"),
299 Usage: %s [OPTION]... [-T] SOURCE DEST\n\
300 or: %s [OPTION]... SOURCE... DIRECTORY\n\
301 or: %s [OPTION]... -t DIRECTORY SOURCE...\n\
303 program_name, program_name, program_name);
305 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
309 Mandatory arguments to long options are mandatory for short options too.\n\
312 --backup[=CONTROL] make a backup of each existing destination file\n\
313 -b like --backup but does not accept an argument\n\
314 -f, --force do not prompt before overwriting\n\
315 -i, --interactive prompt before overwrite\n\
318 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
320 -S, --suffix=SUFFIX override the usual backup suffix\n\
323 -t, --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
324 -T, --no-target-directory treat DEST as a normal file\n\
325 -u, --update move only when the SOURCE file is newer\n\
326 than the destination file or when the\n\
327 destination file is missing\n\
328 -v, --verbose explain what is being done\n\
330 fputs (HELP_OPTION_DESCRIPTION, stdout);
331 fputs (VERSION_OPTION_DESCRIPTION, stdout);
334 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
335 The version control method may be selected via the --backup option or through\n\
336 the VERSION_CONTROL environment variable. Here are the values:\n\
340 none, off never make backups (even if --backup is given)\n\
341 numbered, t make numbered backups\n\
342 existing, nil numbered if numbered backups exist, simple otherwise\n\
343 simple, never always make simple backups\n\
345 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
351 main (int argc, char **argv)
355 bool make_backups = false;
356 char *backup_suffix_string;
357 char *version_control_string = NULL;
359 char *target_directory = NULL;
360 bool no_target_directory = false;
364 initialize_main (&argc, &argv);
365 program_name = argv[0];
366 setlocale (LC_ALL, "");
367 bindtextdomain (PACKAGE, LOCALEDIR);
368 textdomain (PACKAGE);
370 atexit (close_stdout);
374 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
375 we'll actually use backup_suffix_string. */
376 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
378 while ((c = getopt_long (argc, argv, "bfit:uvS:T", long_options, NULL))
386 version_control_string = optarg;
389 x.interactive = I_ALWAYS_YES;
392 x.interactive = I_ASK_USER;
394 case REPLY_OPTION: /* Deprecated */
395 x.interactive = XARGMATCH ("--reply", optarg,
396 reply_args, reply_vals);
398 _("the --reply option is deprecated; use -i or -f instead"));
400 case STRIP_TRAILING_SLASHES_OPTION:
401 remove_trailing_slashes = true;
404 if (target_directory)
405 error (EXIT_FAILURE, 0, _("multiple target directories specified"));
409 if (stat (optarg, &st) != 0)
410 error (EXIT_FAILURE, errno, _("accessing %s"), quote (optarg));
411 if (! S_ISDIR (st.st_mode))
412 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
415 target_directory = optarg;
418 no_target_directory = true;
428 backup_suffix_string = optarg;
430 case_GETOPT_HELP_CHAR;
431 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
433 usage (EXIT_FAILURE);
437 n_files = argc - optind;
438 file = argv + optind;
440 if (n_files <= !target_directory)
443 error (0, 0, _("missing file operand"));
445 error (0, 0, _("missing destination file operand after %s"),
447 usage (EXIT_FAILURE);
450 if (no_target_directory)
452 if (target_directory)
453 error (EXIT_FAILURE, 0,
454 _("Cannot combine --target-directory (-t) "
455 "and --no-target-directory (-T)"));
458 error (0, 0, _("extra operand %s"), quote (file[2]));
459 usage (EXIT_FAILURE);
462 else if (!target_directory)
464 if (2 <= n_files && 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);