1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 1995-2002 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. */
18 /* Written by Mike Parker, David MacKenzie, and Jim Meyering */
27 #include <sys/types.h>
32 #include "backupfile.h"
37 #include "path-concat.h"
41 /* The official name of this program (e.g., no `g' prefix). */
42 #define PROGRAM_NAME "mv"
44 #define AUTHORS N_ ("Mike Parker, David MacKenzie, and Jim Meyering")
46 /* Initial number of entries in each hash table entry's table of inodes. */
47 #define INITIAL_HASH_MODULE 100
49 /* Initial number of entries in the inode hash table. */
50 #define INITIAL_ENTRY_TAB_SIZE 70
52 /* For long options that have no equivalent short option, use a
53 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
56 TARGET_DIRECTORY_OPTION = CHAR_MAX + 1,
57 STRIP_TRAILING_SLASHES_OPTION,
66 /* The name this program was run with. */
69 /* Remove any trailing slashes from each SOURCE argument. */
70 static int remove_trailing_slashes;
72 /* Valid arguments to the `--reply' option. */
73 static char const* const reply_args[] =
75 "yes", "no", "query", 0
78 /* The values that correspond to the above strings. */
79 static int const reply_vals[] =
81 I_ALWAYS_YES, I_ALWAYS_NO, I_ASK_USER
84 static struct option const long_options[] =
86 {"backup", optional_argument, NULL, 'b'},
87 {"force", no_argument, NULL, 'f'},
88 {"interactive", no_argument, NULL, 'i'},
89 {"reply", required_argument, NULL, REPLY_OPTION},
90 {"strip-trailing-slashes", no_argument, NULL, STRIP_TRAILING_SLASHES_OPTION},
91 {"suffix", required_argument, NULL, 'S'},
92 {"target-directory", required_argument, NULL, TARGET_DIRECTORY_OPTION},
93 {"update", no_argument, NULL, 'u'},
94 {"verbose", no_argument, NULL, 'v'},
95 {"version-control", required_argument, NULL, 'V'},
96 {GETOPT_HELP_OPTION_DECL},
97 {GETOPT_VERSION_OPTION_DECL},
102 rm_option_init (struct rm_options *x)
106 x->ignore_missing_files = 0;
110 /* Should we prompt for removal, too? No. Prompting for the `move'
111 part is enough. It implies removal. */
119 cp_option_init (struct cp_options *x)
121 x->copy_as_regular = 0; /* FIXME: maybe make this an option */
122 x->dereference = DEREF_NEVER;
123 x->unlink_dest_before_opening = 0;
124 x->unlink_dest_after_failed_open = 0;
126 x->interactive = I_UNSPECIFIED;
128 x->myeuid = geteuid ();
129 x->one_file_system = 0;
130 x->preserve_ownership = 1;
131 x->preserve_links = 1;
132 x->preserve_mode = 1;
133 x->preserve_timestamps = 1;
134 x->require_preserve = 0; /* FIXME: maybe make this an option */
136 x->sparse_mode = SPARSE_AUTO; /* FIXME: maybe make this an option */
137 x->symbolic_link = 0;
140 x->stdin_tty = isatty (STDIN_FILENO);
142 /* Find out the current file creation mask, to knock the right bits
143 when using chmod. The creation mask is set to be liberal, so
144 that created directories can be written, even if it would not
145 have been allowed with the mask this process was started with. */
146 x->umask_kill = ~ umask (0);
155 /* If PATH is an existing directory, return nonzero, else 0. */
158 is_real_dir (const char *path)
162 return lstat (path, &stats) == 0 && S_ISDIR (stats.st_mode);
165 /* Move SOURCE onto DEST. Handles cross-filesystem moves.
166 If SOURCE is a directory, DEST must not exist.
167 Return 0 if successful, non-zero if an error occurred. */
170 do_move (const char *source, const char *dest, const struct cp_options *x)
172 static int first = 1;
174 int rename_succeeded;
181 /* Allocate space for remembering copied and created files. */
185 fail = copy (source, dest, 0, x, ©_into_self, &rename_succeeded);
189 char const *dir_to_remove;
192 /* In general, when copy returns with copy_into_self set, SOURCE is
193 the same as, or a parent of DEST. In this case we know it's a
194 parent. It doesn't make sense to move a directory into itself, and
195 besides in some situations doing so would give highly nonintuitive
196 results. Run this `mkdir b; touch a c; mv * b' in an empty
197 directory. Here's the result of running echo `find b -print`:
198 b b/a b/b b/b/a b/c. Notice that only file `a' was copied
199 into b/b. Handle this by giving a diagnostic, removing the
200 copied-into-self directory, DEST (`b/b' in the example),
203 dir_to_remove = NULL;
206 else if (rename_succeeded)
208 /* No need to remove anything. SOURCE was successfully
209 renamed to DEST. Or the user declined to rename a file. */
210 dir_to_remove = NULL;
214 /* This may mean SOURCE and DEST referred to different devices.
215 It may also conceivably mean that even though they referred
216 to the same device, rename wasn't implemented for that device.
218 E.g., (from Joel N. Weber),
219 [...] there might someday be cases where you can't rename
220 but you can copy where the device name is the same, especially
221 on Hurd. Consider an ftpfs with a primitive ftp server that
222 supports uploading, downloading and deleting, but not renaming.
224 Also, note that comparing device numbers is not a reliable
225 check for `can-rename'. Some systems can be set up so that
226 files from many different physical devices all have the same
227 st_dev field. This is a feature of some NFS mounting
230 We reach this point if SOURCE has been successfully copied
231 to DEST. Now we have to remove SOURCE.
233 This function used to resort to copying only when rename
234 failed and set errno to EXDEV. */
236 dir_to_remove = source;
239 if (dir_to_remove != NULL)
241 struct rm_options rm_options;
242 enum RM_status status;
244 rm_option_init (&rm_options);
245 rm_options.verbose = x->verbose;
247 status = rm (1, &dir_to_remove, &rm_options);
248 assert (VALID_STATUS (status));
249 if (status == RM_ERROR)
257 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
258 DEST_IS_DIR must be nonzero when DEST is a directory or a symlink to a
259 directory and zero otherwise.
260 Return 0 if successful, non-zero if an error occurred. */
263 movefile (char *source, char *dest, int dest_is_dir,
264 const struct cp_options *x)
266 int dest_had_trailing_slash = strip_trailing_slashes (dest);
269 /* This code was introduced to handle the ambiguity in the semantics
270 of mv that is induced by the varying semantics of the rename function.
271 Some systems (e.g., Linux) have a rename function that honors a
272 trailing slash, while others (like Solaris 5,6,7) have a rename
273 function that ignores a trailing slash. I believe the Linux
274 rename semantics are POSIX and susv2 compliant. */
276 if (remove_trailing_slashes)
277 strip_trailing_slashes (source);
279 /* In addition to when DEST is a directory, if DEST has a trailing
280 slash and neither SOURCE nor DEST is a directory, presume the target
281 is DEST/`basename source`. This converts `mv x y/' to `mv x y/x'.
282 This change means that the command `mv any file/' will now fail
283 rather than performing the move. The case when SOURCE is a
284 directory and DEST is not is properly diagnosed by do_move. */
286 if (dest_is_dir || (dest_had_trailing_slash && !is_real_dir (source)))
288 /* DEST is a directory; build full target filename. */
292 strip_trailing_slashes (source);
293 src_basename = base_name (source);
294 new_dest = path_concat (dest, src_basename, NULL);
295 if (new_dest == NULL)
297 fail = do_move (source, new_dest, x);
302 fail = do_move (source, dest, x);
312 fprintf (stderr, _("Try `%s --help' for more information.\n"),
317 Usage: %s [OPTION]... SOURCE DEST\n\
318 or: %s [OPTION]... SOURCE... DIRECTORY\n\
319 or: %s [OPTION]... --target-directory=DIRECTORY SOURCE...\n\
321 program_name, program_name, program_name);
323 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
327 Mandatory arguments to long options are mandatory for short options too.\n\
330 --backup[=CONTROL] make a backup of each existing destination file\n\
331 -b like --backup but does not accept an argument\n\
332 -f, --force do not prompt before overwriting\n\
333 equivalent to --reply=yes\n\
334 -i, --interactive prompt before overwrite\n\
335 equivalent to --reply=query\n\
338 --reply={yes,no,query} specify how to handle the prompt about an\n\
339 existing destination file\n\
340 --strip-trailing-slashes remove any trailing slashes from each SOURCE\n\
342 -S, --suffix=SUFFIX override the usual backup suffix\n\
345 --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY\n\
346 -u, --update move only when the SOURCE file is newer\n\
347 than the destination file or when the\n\
348 destination file is missing\n\
349 -v, --verbose explain what is being done\n\
351 fputs (HELP_OPTION_DESCRIPTION, stdout);
352 fputs (VERSION_OPTION_DESCRIPTION, stdout);
355 The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
356 The version control method may be selected via the --backup option or through\n\
357 the VERSION_CONTROL environment variable. Here are the values:\n\
361 none, off never make backups (even if --backup is given)\n\
362 numbered, t make numbered backups\n\
363 existing, nil numbered if numbered backups exist, simple otherwise\n\
364 simple, never always make simple backups\n\
366 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
372 main (int argc, char **argv)
376 int make_backups = 0;
378 char *backup_suffix_string;
379 char *version_control_string = NULL;
381 char *target_directory = NULL;
382 int target_directory_specified;
383 unsigned int n_files;
386 program_name = argv[0];
387 setlocale (LC_ALL, "");
388 bindtextdomain (PACKAGE, LOCALEDIR);
389 textdomain (PACKAGE);
391 atexit (close_stdout);
395 /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
396 we'll actually use backup_suffix_string. */
397 backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
401 while ((c = getopt_long (argc, argv, "bfiuvS:V:", long_options, NULL)) != -1)
408 case 'V': /* FIXME: this is deprecated. Remove it in 2001. */
410 _("warning: --version-control (-V) is obsolete; support for\
411 it\nwill be removed in some future release. Use --backup=%s instead."
418 version_control_string = optarg;
421 x.interactive = I_ALWAYS_YES;
424 x.interactive = I_ASK_USER;
427 x.interactive = XARGMATCH ("--reply", optarg,
428 reply_args, reply_vals);
430 case STRIP_TRAILING_SLASHES_OPTION:
431 remove_trailing_slashes = 1;
433 case TARGET_DIRECTORY_OPTION:
434 target_directory = optarg;
444 backup_suffix_string = optarg;
446 case_GETOPT_HELP_CHAR;
447 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
453 n_files = argc - optind;
454 file = argv + optind;
456 target_directory_specified = (target_directory != NULL);
457 if (target_directory == NULL && n_files != 0)
458 target_directory = file[n_files - 1];
460 dest_is_dir = (n_files > 0 && isdir (target_directory));
462 if (n_files == 0 || (n_files == 1 && !target_directory_specified))
464 error (0, 0, _("missing file argument"));
468 if (target_directory_specified)
472 error (0, 0, _("specified target, %s is not a directory"),
473 quote (target_directory));
477 else if (n_files > 2 && !dest_is_dir)
480 _("when moving multiple files, last argument must be a directory"));
484 if (backup_suffix_string)
485 simple_backup_suffix = xstrdup (backup_suffix_string);
487 x.backup_type = (make_backups
488 ? xget_version (_("backup type"),
489 version_control_string)
492 /* Move each arg but the last into the target_directory. */
494 unsigned int last_file_idx = (target_directory_specified
499 /* Initialize the hash table only if we'll need it.
500 The problem it is used to detect can arise only if there are
501 two or more files to move. */
505 for (i = 0; i <= last_file_idx; ++i)
506 errors |= movefile (file[i], target_directory, dest_is_dir, &x);