2 * Copyright (c) 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * David Hitz of Auspex Systems Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static char const copyright[] =
36 "@(#) Copyright (c) 1988, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
41 static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
48 * Cp copies source files to target files.
50 * The global PATH_T structure "to" always contains the path to the
51 * current target file. Since fts(3) does not change directories,
52 * this path can be either absolute or dot-relative.
54 * The basic algorithm is to initialize "to" and use fts(3) to traverse
55 * the file hierarchy rooted in the argument list. A trivial case is the
56 * case of 'cp file1 file2'. The more interesting case is the case of
57 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
58 * path (relative to the root of the traversal) is appended to dir (stored
59 * in "to") to form the final target path.
62 #include <sys/types.h>
77 #define STRIP_TRAILING_SLASH(p) { \
78 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
82 static char emptystring[] = "";
84 PATH_T to = { to.p_path, emptystring, "" };
86 int fflag, iflag, lflag, nflag, pflag, sflag, vflag;
87 static int Rflag, rflag;
88 volatile sig_atomic_t info;
90 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
92 static int copy(char *[], enum op, int);
93 static void siginfo(int __unused);
96 main(int argc, char *argv[])
98 struct stat to_stat, tmp_stat;
100 int Hflag, Lflag, ch, fts_options, r, have_trailing_slash;
103 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
105 while ((ch = getopt(argc, argv, "HLPRafilnprsvx")) != -1)
155 fts_options |= FTS_XDEV;
168 errx(1, "the -R and -r options may not be specified together");
170 errx(1, "the -l and -s options may not be specified together");
175 fts_options |= FTS_COMFOLLOW;
177 fts_options &= ~FTS_PHYSICAL;
178 fts_options |= FTS_LOGICAL;
181 fts_options &= ~FTS_PHYSICAL;
182 fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
184 (void)signal(SIGINFO, siginfo);
186 /* Save the target base in "to". */
187 target = argv[--argc];
188 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
189 errx(1, "%s: name too long", target);
190 to.p_end = to.p_path + strlen(to.p_path);
191 if (to.p_path == to.p_end) {
195 have_trailing_slash = (to.p_end[-1] == '/');
196 if (have_trailing_slash)
197 STRIP_TRAILING_SLASH(to);
198 to.target_end = to.p_end;
200 /* Set end of argument list for fts(3). */
204 * Cp has two distinct cases:
206 * cp [-R] source target
207 * cp [-R] source1 ... sourceN directory
209 * In both cases, source can be either a file or a directory.
211 * In (1), the target becomes a copy of the source. That is, if the
212 * source is a file, the target will be a file, and likewise for
215 * In (2), the real target is not directory, but "directory/source".
217 r = stat(to.p_path, &to_stat);
218 if (r == -1 && errno != ENOENT)
219 err(1, "%s", to.p_path);
220 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
222 * Case (1). Target is not a directory.
225 errx(1, "%s is not a directory", to.p_path);
228 * Need to detect the case:
230 * Where dir is a directory and foo does not exist, where
231 * we want pathname concatenations turned on but not for
232 * the initial mkdir().
235 if (Rflag && (Lflag || Hflag))
236 stat(*argv, &tmp_stat);
238 lstat(*argv, &tmp_stat);
240 if (S_ISDIR(tmp_stat.st_mode) && Rflag)
247 if (have_trailing_slash && type == FILE_TO_FILE) {
249 errx(1, "directory %s does not exist",
252 errx(1, "%s is not a directory", to.p_path);
256 * Case (2). Target is a directory.
260 exit (copy(argv, type, fts_options));
264 copy(char *argv[], enum op type, int fts_options)
269 int base = 0, dne, badcp, rval;
271 char *p, *target_mid;
275 * Keep an inverted copy of the umask, for use in correcting
276 * permissions on created directories when not using -p.
281 if ((ftsp = fts_open(argv, fts_options, NULL)) == NULL)
283 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
284 switch (curr->fts_info) {
289 curr->fts_path, strerror(curr->fts_errno));
292 case FTS_DC: /* Warn, continue. */
293 warnx("%s: directory causes a cycle", curr->fts_path);
301 * If we are in case (2) or (3) above, we need to append the
302 * source name to the target name.
304 if (type != FILE_TO_FILE) {
306 * Need to remember the roots of traversals to create
307 * correct pathnames. If there's a directory being
308 * copied to a non-existent directory, e.g.
309 * cp -R a/dir noexist
310 * the resulting path name should be noexist/foo, not
311 * noexist/dir/foo (where foo is a file in dir), which
312 * is the case where the target exists.
314 * Also, check for "..". This is for correct path
315 * concatenation for paths ending in "..", e.g.
317 * Paths ending in ".." are changed to ".". This is
318 * tricky, but seems the easiest way to fix the problem.
321 * Since the first level MUST be FTS_ROOTLEVEL, base
322 * is always initialized.
324 if (curr->fts_level == FTS_ROOTLEVEL) {
325 if (type != DIR_TO_DNE) {
326 p = strrchr(curr->fts_path, '/');
327 base = (p == NULL) ? 0 :
328 (int)(p - curr->fts_path + 1);
330 if (!strcmp(&curr->fts_path[base],
334 base = curr->fts_pathlen;
337 p = &curr->fts_path[base];
338 nlen = curr->fts_pathlen - base;
339 target_mid = to.target_end;
340 if (*p != '/' && target_mid[-1] != '/')
343 if (target_mid - to.p_path + nlen >= PATH_MAX) {
344 warnx("%s%s: name too long (not copied)",
349 (void)strncat(target_mid, p, nlen);
350 to.p_end = target_mid + nlen;
352 STRIP_TRAILING_SLASH(to);
355 if (curr->fts_info == FTS_DP) {
357 * We are nearly finished with this directory. If we
358 * didn't actually copy it, or otherwise don't need to
359 * change its attributes, then we are done.
361 if (!curr->fts_number)
364 * If -p is in effect, set all the attributes.
365 * Otherwise, set the correct permissions, limited
366 * by the umask. Optimise by avoiding a chmod()
367 * if possible (which is usually the case if we
368 * made the directory). Note that mkdir() does not
369 * honour setuid, setgid and sticky bits, but we
370 * normally want to preserve them on directories.
373 if (setfile(curr->fts_statp, -1))
375 if (preserve_dir_acls(curr->fts_statp,
376 curr->fts_accpath, to.p_path) != 0)
379 mode = curr->fts_statp->st_mode;
380 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
381 ((mode | S_IRWXU) & mask) != (mode & mask))
382 if (chmod(to.p_path, mode & mask) !=
384 warn("chmod: %s", to.p_path);
391 /* Not an error but need to remember it happened. */
392 if (stat(to.p_path, &to_stat) == -1)
395 if (to_stat.st_dev == curr->fts_statp->st_dev &&
396 to_stat.st_ino == curr->fts_statp->st_ino) {
397 warnx("%s and %s are identical (not copied).",
398 to.p_path, curr->fts_path);
400 if (S_ISDIR(curr->fts_statp->st_mode))
401 (void)fts_set(ftsp, curr, FTS_SKIP);
404 if (!S_ISDIR(curr->fts_statp->st_mode) &&
405 S_ISDIR(to_stat.st_mode)) {
406 warnx("cannot overwrite directory %s with "
408 to.p_path, curr->fts_path);
415 switch (curr->fts_statp->st_mode & S_IFMT) {
417 /* Catch special case of a non-dangling symlink. */
418 if ((fts_options & FTS_LOGICAL) ||
419 ((fts_options & FTS_COMFOLLOW) &&
420 curr->fts_level == 0)) {
421 if (copy_file(curr, dne))
424 if (copy_link(curr, !dne))
430 warnx("%s is a directory (not copied).",
432 (void)fts_set(ftsp, curr, FTS_SKIP);
437 * If the directory doesn't exist, create the new
438 * one with the from file mode plus owner RWX bits,
439 * modified by the umask. Trade-off between being
440 * able to write the directory (if from directory is
441 * 555) and not causing a permissions race. If the
442 * umask blocks owner writes, we fail.
446 curr->fts_statp->st_mode | S_IRWXU) < 0)
447 err(1, "%s", to.p_path);
448 } else if (!S_ISDIR(to_stat.st_mode)) {
450 err(1, "%s", to.p_path);
453 * Arrange to correct directory attributes later
454 * (in the post-order phase) if this is a new
455 * directory, or if the -p flag is in effect.
457 curr->fts_number = pflag || dne;
461 if (Rflag && !sflag) {
462 if (copy_special(curr->fts_statp, !dne))
465 if (copy_file(curr, dne))
470 warnx("%s is a socket (not copied).",
474 if (Rflag && !sflag) {
475 if (copy_fifo(curr->fts_statp, !dne))
478 if (copy_file(curr, dne))
483 if (copy_file(curr, dne))
488 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
497 siginfo(int sig __unused)