1 /* mv -- move or rename files
2 Copyright (C) 86, 89, 90, 91, 95, 1996 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. */
19 -f, --force Assume a 'y' answer to all questions it would
20 normally ask, and not ask the questions.
22 -i, --interactive Require confirmation from the user before
23 performing any move that would destroy an
26 -u, --update Do not move a nondirectory that has an
27 existing destination with the same or newer
30 -v, --verbose List the name of each file as it is moved, and
31 the name it is moved to.
38 Written by Mike Parker and David MacKenzie */
47 #include <sys/types.h>
50 #include "path-concat.h"
51 #include "backupfile.h"
55 # define chown(PATH, OWNER, GROUP) lchown(PATH, OWNER, GROUP)
58 #ifndef _POSIX_VERSION
63 enum backup_type get_version ();
68 void strip_trailing_slashes ();
71 /* The name this program was run with. */
74 /* If nonzero, query the user before overwriting files. */
75 static int interactive;
77 /* If nonzero, do not query the user before overwriting unwritable
79 static int override_mode;
81 /* If nonzero, do not move a nondirectory that has an existing destination
82 with the same or newer modification time. */
83 static int update = 0;
85 /* If nonzero, list each file as it is moved. */
88 /* If nonzero, stdin is a tty. */
91 /* This process's effective user ID. */
95 static struct stat dest_stats, source_stats;
97 /* If nonzero, display usage information and exit. */
100 /* If nonzero, print the version on standard output and exit. */
101 static int show_version;
103 static struct option const long_options[] =
105 {"backup", no_argument, NULL, 'b'},
106 {"force", no_argument, NULL, 'f'},
107 {"interactive", no_argument, NULL, 'i'},
108 {"suffix", required_argument, NULL, 'S'},
109 {"update", no_argument, &update, 1},
110 {"verbose", no_argument, &verbose, 1},
111 {"version-control", required_argument, NULL, 'V'},
112 {"help", no_argument, &show_help, 1},
113 {"version", no_argument, &show_version, 1},
117 /* If PATH is an existing directory, return nonzero, else 0. */
120 is_real_dir (const char *path)
124 return lstat (path, &stats) == 0 && S_ISDIR (stats.st_mode);
127 /* Copy regular file SOURCE onto file DEST.
128 Return 1 if an error occurred, 0 if successful. */
131 copy_reg (const char *source, const char *dest)
136 int len; /* Number of bytes read into `buf'. */
138 if (!S_ISREG (source_stats.st_mode))
141 _("cannot move `%s' across filesystems: Not a regular file"),
146 if (unlink (dest) && errno != ENOENT)
148 error (0, errno, _("cannot remove `%s'"), dest);
152 ifd = open (source, O_RDONLY, 0);
155 error (0, errno, "%s", source);
158 ofd = open (dest, O_WRONLY | O_CREAT | O_TRUNC, 0600);
161 error (0, errno, "%s", dest);
166 while ((len = safe_read (ifd, buf, sizeof (buf))) > 0)
168 if (full_write (ofd, buf, len) < 0)
170 error (0, errno, "%s", dest);
179 error (0, errno, "%s", source);
188 error (0, errno, "%s", source);
194 error (0, errno, "%s", dest);
198 /* chown turns off set[ug]id bits for non-root,
199 so do the chmod last. */
201 /* Try to copy the old file's modtime and access time. */
205 tv.actime = source_stats.st_atime;
206 tv.modtime = source_stats.st_mtime;
207 if (utime (dest, &tv))
209 error (0, errno, "%s", dest);
214 /* Try to preserve ownership. For non-root it might fail, but that's ok.
215 But root probably wants to know, e.g. if NFS disallows it. */
216 if (chown (dest, source_stats.st_uid, source_stats.st_gid)
217 && (errno != EPERM || myeuid == 0))
219 error (0, errno, "%s", dest);
223 if (chmod (dest, source_stats.st_mode & 07777))
225 error (0, errno, "%s", dest);
232 /* Move SOURCE onto DEST. Handles cross-filesystem moves.
233 If DEST is a directory, SOURCE must be also.
234 Return 0 if successful, 1 if an error occurred. */
237 do_move (const char *source, const char *dest)
239 char *dest_backup = NULL;
241 if (lstat (source, &source_stats) != 0)
243 error (0, errno, "%s", source);
247 if (lstat (dest, &dest_stats) == 0)
249 if (source_stats.st_dev == dest_stats.st_dev
250 && source_stats.st_ino == dest_stats.st_ino)
252 error (0, 0, _("`%s' and `%s' are the same file"), source, dest);
256 if (S_ISDIR (dest_stats.st_mode))
258 error (0, 0, _("%s: cannot overwrite directory"), dest);
262 if (!S_ISDIR (source_stats.st_mode) && update
263 && source_stats.st_mtime <= dest_stats.st_mtime)
266 if (!override_mode && (interactive || stdin_tty)
267 && euidaccess (dest, W_OK))
269 fprintf (stderr, _("%s: replace `%s', overriding mode %04o? "),
271 (unsigned int) (dest_stats.st_mode & 07777));
275 else if (interactive)
277 fprintf (stderr, _("%s: replace `%s'? "), program_name, dest);
282 if (backup_type != none)
284 char *tmp_backup = find_backup_file_name (dest);
285 if (tmp_backup == NULL)
286 error (1, 0, _("virtual memory exhausted"));
287 dest_backup = (char *) alloca (strlen (tmp_backup) + 1);
288 strcpy (dest_backup, tmp_backup);
290 if (rename (dest, dest_backup))
294 error (0, errno, _("cannot backup `%s'"), dest);
302 else if (errno != ENOENT)
304 error (0, errno, "%s", dest);
309 printf ("%s -> %s\n", source, dest);
311 if (rename (source, dest) == 0)
318 error (0, errno, _("cannot move `%s' to `%s'"), source, dest);
322 /* rename failed on cross-filesystem link. Copy the file instead. */
324 if (copy_reg (source, dest))
329 error (0, errno, _("cannot remove `%s'"), source);
338 if (rename (dest_backup, dest))
339 error (0, errno, _("cannot un-backup `%s'"), dest);
344 /* Move file SOURCE onto DEST. Handles the case when DEST is a directory.
345 Return 0 if successful, 1 if an error occurred. */
348 movefile (const char *source, const char *dest)
350 strip_trailing_slashes (source);
352 if ((dest[strlen (dest) - 1] == '/' && !is_real_dir (source))
355 /* Target is a directory; build full target filename. */
360 base = basename (source);
361 new_dest = path_concat (dest, base, NULL);
362 if (new_dest == NULL)
363 error (1, 0, _("virtual memory exhausted"));
364 fail = do_move (source, new_dest);
369 return do_move (source, dest);
376 fprintf (stderr, _("Try `%s --help' for more information.\n"),
381 Usage: %s [OPTION]... SOURCE DEST\n\
382 or: %s [OPTION]... SOURCE... DIRECTORY\n\
384 program_name, program_name);
386 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n\
388 -b, --backup make backup before removal\n\
389 -f, --force remove existing destinations, never prompt\n\
390 -i, --interactive prompt before overwrite\n\
391 -S, --suffix=SUFFIX override the usual backup suffix\n\
392 -u, --update move only older or brand new files\n\
393 -v, --verbose explain what is being done\n\
394 -V, --version-control=WORD override the usual version control\n\
395 --help display this help and exit\n\
396 --version output version information and exit\n\
400 The backup suffix is ~, unless set with SIMPLE_BACKUP_SUFFIX. The\n\
401 version control may be set with VERSION_CONTROL, values are:\n\
403 t, numbered make numbered backups\n\
404 nil, existing numbered if numbered backups exist, simple otherwise\n\
405 never, simple always make simple backups\n\
407 puts (_("\nReport bugs to fileutils-bugs@gnu.ai.mit.edu"));
413 main (int argc, char **argv)
417 int make_backups = 0;
420 program_name = argv[0];
421 setlocale (LC_ALL, "");
422 bindtextdomain (PACKAGE, LOCALEDIR);
423 textdomain (PACKAGE);
425 version = getenv ("SIMPLE_BACKUP_SUFFIX");
427 simple_backup_suffix = version;
428 version = getenv ("VERSION_CONTROL");
431 interactive = override_mode = verbose = update = 0;
434 while ((c = getopt_long (argc, argv, "bfiuvS:V:", long_options, NULL)) != -1)
458 simple_backup_suffix = optarg;
470 printf ("mv (%s) %s\n", GNU_PACKAGE, VERSION);
477 if (argc < optind + 2)
479 error (0, 0, "%s", (argc == optind
480 ? _("missing file arguments")
481 : _("missing file argument")));
486 backup_type = get_version (version);
488 stdin_tty = isatty (STDIN_FILENO);
490 if (argc > optind + 2 && !isdir (argv[argc - 1]))
492 _("when moving multiple files, last argument must be a directory"));
494 /* Move each arg but the last onto the last. */
495 for (; optind < argc - 1; ++optind)
496 errors |= movefile (argv[optind], argv[argc - 1]);