1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 1995-2006 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->ignore_missing_files = false;
96 x->root_dev_ino = NULL;
99 /* Should we prompt for removal, too? No. Prompting for the `move'
100 part is enough. It implies removal. */
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;
114 cp_option_init (struct cp_options *x)
116 x->copy_as_regular = false; /* FIXME: maybe make this an option */
117 x->dereference = DEREF_NEVER;
118 x->unlink_dest_before_opening = false;
119 x->unlink_dest_after_failed_open = false;
120 x->hard_link = false;
121 x->interactive = I_UNSPECIFIED;
123 x->chown_privileges = chown_privileges ();
124 x->one_file_system = false;
125 x->preserve_ownership = true;
126 x->preserve_links = true;
127 x->preserve_mode = true;
128 x->preserve_timestamps = true;
129 x->require_preserve = false; /* FIXME: maybe make this an option */
131 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
132 x->symbolic_link = false;
135 x->stdin_tty = isatty (STDIN_FILENO);
143 /* FILE is the last operand of this command. Return true if FILE is a
144 directory. But report an error there is a problem accessing FILE,
145 or if FILE does not exist but would have to refer to an existing
146 directory if it referred to anything at all. */
149 target_directory_operand (char const *file)
151 char const *b = last_component (file);
152 size_t blen = strlen (b);
153 bool looks_like_a_dir = (blen == 0 || ISSLASH (b[blen - 1]));
155 int err = (stat (file, &st) == 0 ? 0 : errno);
156 bool is_a_dir = !err && S_ISDIR (st.st_mode);
157 if (err && err != ENOENT)
158 error (EXIT_FAILURE, err, _("accessing %s"), quote (file));
159 if (is_a_dir < looks_like_a_dir)
160 error (EXIT_FAILURE, err, _("target %s is not a directory"), quote (file));
164 /* Move SOURCE onto DEST. Handles cross-file-system moves.
165 If SOURCE is a directory, DEST must not exist.
166 Return true if successful. */
169 do_move (const char *source, const char *dest, const struct cp_options *x)
172 bool rename_succeeded;
173 bool ok = copy (source, dest, false, x, ©_into_self, &rename_succeeded);
177 char const *dir_to_remove;
180 /* In general, when copy returns with copy_into_self set, SOURCE is
181 the same as, or a parent of DEST. In this case we know it's a
182 parent. It doesn't make sense to move a directory into itself, and
183 besides in some situations doing so would give highly nonintuitive
184 results. Run this `mkdir b; touch a c; mv * b' in an empty
185 directory. Here's the result of running echo `find b -print`:
186 b b/a b/b b/b/a b/c. Notice that only file `a' was copied
187 into b/b. Handle this by giving a diagnostic, removing the
188 copied-into-self directory, DEST (`b/b' in the example),
191 dir_to_remove = NULL;
194 else if (rename_succeeded)
196 /* No need to remove anything. SOURCE was successfully
197 renamed to DEST. Or the user declined to rename a file. */
198 dir_to_remove = NULL;
202 /* This may mean SOURCE and DEST referred to different devices.
203 It may also conceivably mean that even though they referred
204 to the same device, rename wasn't implemented for that device.
206 E.g., (from Joel N. Weber),
207 [...] there might someday be cases where you can't rename
208 but you can copy where the device name is the same, especially
209 on Hurd. Consider an ftpfs with a primitive ftp server that
210 supports uploading, downloading and deleting, but not renaming.
212 Also, note that comparing device numbers is not a reliable
213 check for `can-rename'. Some systems can be set up so that
214 files from many different physical devices all have the same
215 st_dev field. This is a feature of some NFS mounting
218 We reach this point if SOURCE has been successfully copied
219 to DEST. Now we have to remove SOURCE.
221 This function used to resort to copying only when rename
222 failed and set errno to EXDEV. */
224 dir_to_remove = source;
227 if (dir_to_remove != NULL)
229 struct rm_options rm_options;
230 enum RM_status status;
232 rm_option_init (&rm_options);
233 rm_options.verbose = x->verbose;
235 status = rm (1, &dir_to_remove, &rm_options);
236 assert (VALID_STATUS (status));
237 if (status == RM_ERROR)
245 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
246 Treat DEST as a directory if DEST_IS_DIR.
247 Return true if successful. */
250 movefile (char *source, char *dest, bool dest_is_dir,
251 const struct cp_options *x)
255 /* This code was introduced to handle the ambiguity in the semantics
256 of mv that is induced by the varying semantics of the rename function.
257 Some systems (e.g., Linux) have a rename function that honors a
258 trailing slash, while others (like Solaris 5,6,7) have a rename
259 function that ignores a trailing slash. I believe the Linux
260 rename semantics are POSIX and susv2 compliant. */
262 strip_trailing_slashes (dest);
263 if (remove_trailing_slashes)
264 strip_trailing_slashes (source);
268 /* Treat DEST as a directory; build the full filename. */
269 char const *src_basename = last_component (source);
270 char *new_dest = file_name_concat (dest, src_basename, NULL);
271 strip_trailing_slashes (new_dest);
272 ok = do_move (source, new_dest, x);
277 ok = do_move (source, dest, x);
286 if (status != EXIT_SUCCESS)
287 fprintf (stderr, _("Try `%s --help' for more information.\n"),
292 Usage: %s [OPTION]... [-T] SOURCE DEST\n\
293 or: %s [OPTION]... SOURCE... DIRECTORY\n\
294 or: %s [OPTION]... -t DIRECTORY SOURCE...\n\
296 program_name, program_name, program_name);
298 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
302 Mandatory arguments to long options are mandatory for short options too.\n\
305 --backup[=CONTROL] make a backup of each existing destination file\n\
306 -b like --backup but does not accept an argument\n\
307 -f, --force do not prompt before overwriting\n\
308 -i, --interactive prompt before overwrite\n\
311 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
313 -S, --suffix=SUFFIX override the usual backup suffix\n\
316 -t, --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
317 -T, --no-target-directory treat DEST as a normal file\n\
318 -u, --update move only when the SOURCE file is newer\n\
319 than the destination file or when the\n\
320 destination file is missing\n\
321 -v, --verbose explain what is being done\n\
323 fputs (HELP_OPTION_DESCRIPTION, stdout);
324 fputs (VERSION_OPTION_DESCRIPTION, stdout);
327 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
328 The version control method may be selected via the --backup option or through\n\
329 the VERSION_CONTROL environment variable. Here are the values:\n\
333 none, off never make backups (even if --backup is given)\n\
334 numbered, t make numbered backups\n\
335 existing, nil numbered if numbered backups exist, simple otherwise\n\
336 simple, never always make simple backups\n\
338 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
344 main (int argc, char **argv)
348 bool make_backups = false;
349 char *backup_suffix_string;
350 char *version_control_string = NULL;
352 char *target_directory = NULL;
353 bool no_target_directory = false;
357 initialize_main (&argc, &argv);
358 program_name = argv[0];
359 setlocale (LC_ALL, "");
360 bindtextdomain (PACKAGE, LOCALEDIR);
361 textdomain (PACKAGE);
363 atexit (close_stdout);
367 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
368 we'll actually use backup_suffix_string. */
369 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
371 while ((c = getopt_long (argc, argv, "bfit:uvS:T", long_options, NULL))
379 version_control_string = optarg;
382 x.interactive = I_ALWAYS_YES;
385 x.interactive = I_ASK_USER;
387 case REPLY_OPTION: /* Deprecated */
388 x.interactive = XARGMATCH ("--reply", optarg,
389 reply_args, reply_vals);
391 _("the --reply option is deprecated; use -i or -f instead"));
393 case STRIP_TRAILING_SLASHES_OPTION:
394 remove_trailing_slashes = true;
397 if (target_directory)
398 error (EXIT_FAILURE, 0, _("multiple target directories specified"));
402 if (stat (optarg, &st) != 0)
403 error (EXIT_FAILURE, errno, _("accessing %s"), quote (optarg));
404 if (! S_ISDIR (st.st_mode))
405 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
408 target_directory = optarg;
411 no_target_directory = true;
421 backup_suffix_string = optarg;
423 case_GETOPT_HELP_CHAR;
424 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
426 usage (EXIT_FAILURE);
430 n_files = argc - optind;
431 file = argv + optind;
433 if (n_files <= !target_directory)
436 error (0, 0, _("missing file operand"));
438 error (0, 0, _("missing destination file operand after %s"),
440 usage (EXIT_FAILURE);
443 if (no_target_directory)
445 if (target_directory)
446 error (EXIT_FAILURE, 0,
447 _("Cannot combine --target-directory (-t) "
448 "and --no-target-directory (-T)"));
451 error (0, 0, _("extra operand %s"), quote (file[2]));
452 usage (EXIT_FAILURE);
455 else if (!target_directory)
457 if (2 <= n_files && target_directory_operand (file[n_files - 1]))
458 target_directory = file[--n_files];
459 else if (2 < n_files)
460 error (EXIT_FAILURE, 0, _("target %s is not a directory"),
461 quote (file[n_files - 1]));
464 if (backup_suffix_string)
465 simple_backup_suffix = xstrdup (backup_suffix_string);
467 x.backup_type = (make_backups
468 ? xget_version (_("backup type"),
469 version_control_string)
474 if (target_directory)
478 /* Initialize the hash table only if we'll need it.
479 The problem it is used to detect can arise only if there are
480 two or more files to move. */
485 for (i = 0; i < n_files; ++i)
486 ok &= movefile (file[i], target_directory, true, &x);
489 ok = movefile (file[0], file[1], false, &x);
491 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);