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, 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 int mastercmp(const FTSENT * const *, const FTSENT * const *);
94 static void siginfo(int __unused);
97 main(int argc, char *argv[])
99 struct stat to_stat, tmp_stat;
101 int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
104 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
105 Hflag = Lflag = Pflag = 0;
106 while ((ch = getopt(argc, argv, "HLPRafilnprvx")) != -1)
155 fts_options |= FTS_XDEV;
168 errx(1, "the -R and -r options may not be specified together");
173 fts_options |= FTS_COMFOLLOW;
175 fts_options &= ~FTS_PHYSICAL;
176 fts_options |= FTS_LOGICAL;
179 fts_options &= ~FTS_PHYSICAL;
180 fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
182 (void)signal(SIGINFO, siginfo);
184 /* Save the target base in "to". */
185 target = argv[--argc];
186 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
187 errx(1, "%s: name too long", target);
188 to.p_end = to.p_path + strlen(to.p_path);
189 if (to.p_path == to.p_end) {
193 have_trailing_slash = (to.p_end[-1] == '/');
194 if (have_trailing_slash)
195 STRIP_TRAILING_SLASH(to);
196 to.target_end = to.p_end;
198 /* Set end of argument list for fts(3). */
202 * Cp has two distinct cases:
204 * cp [-R] source target
205 * cp [-R] source1 ... sourceN directory
207 * In both cases, source can be either a file or a directory.
209 * In (1), the target becomes a copy of the source. That is, if the
210 * source is a file, the target will be a file, and likewise for
213 * In (2), the real target is not directory, but "directory/source".
215 r = stat(to.p_path, &to_stat);
216 if (r == -1 && errno != ENOENT)
217 err(1, "%s", to.p_path);
218 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
220 * Case (1). Target is not a directory.
223 errx(1, "%s is not a directory", to.p_path);
226 * Need to detect the case:
228 * Where dir is a directory and foo does not exist, where
229 * we want pathname concatenations turned on but not for
230 * the initial mkdir().
233 if (Rflag && (Lflag || Hflag))
234 stat(*argv, &tmp_stat);
236 lstat(*argv, &tmp_stat);
238 if (S_ISDIR(tmp_stat.st_mode) && Rflag)
245 if (have_trailing_slash && type == FILE_TO_FILE) {
247 errx(1, "directory %s does not exist",
250 errx(1, "%s is not a directory", to.p_path);
254 * Case (2). Target is a directory.
258 exit (copy(argv, type, fts_options));
262 copy(char *argv[], enum op type, int fts_options)
267 int base = 0, dne, badcp, rval;
269 char *p, *target_mid;
273 * Keep an inverted copy of the umask, for use in correcting
274 * permissions on created directories when not using -p.
279 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
281 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
282 switch (curr->fts_info) {
287 curr->fts_path, strerror(curr->fts_errno));
290 case FTS_DC: /* Warn, continue. */
291 warnx("%s: directory causes a cycle", curr->fts_path);
299 * If we are in case (2) or (3) above, we need to append the
300 * source name to the target name.
302 if (type != FILE_TO_FILE) {
304 * Need to remember the roots of traversals to create
305 * correct pathnames. If there's a directory being
306 * copied to a non-existent directory, e.g.
307 * cp -R a/dir noexist
308 * the resulting path name should be noexist/foo, not
309 * noexist/dir/foo (where foo is a file in dir), which
310 * is the case where the target exists.
312 * Also, check for "..". This is for correct path
313 * concatenation for paths ending in "..", e.g.
315 * Paths ending in ".." are changed to ".". This is
316 * tricky, but seems the easiest way to fix the problem.
319 * Since the first level MUST be FTS_ROOTLEVEL, base
320 * is always initialized.
322 if (curr->fts_level == FTS_ROOTLEVEL) {
323 if (type != DIR_TO_DNE) {
324 p = strrchr(curr->fts_path, '/');
325 base = (p == NULL) ? 0 :
326 (int)(p - curr->fts_path + 1);
328 if (!strcmp(&curr->fts_path[base],
332 base = curr->fts_pathlen;
335 p = &curr->fts_path[base];
336 nlen = curr->fts_pathlen - base;
337 target_mid = to.target_end;
338 if (*p != '/' && target_mid[-1] != '/')
341 if (target_mid - to.p_path + nlen >= PATH_MAX) {
342 warnx("%s%s: name too long (not copied)",
347 (void)strncat(target_mid, p, nlen);
348 to.p_end = target_mid + nlen;
350 STRIP_TRAILING_SLASH(to);
353 if (curr->fts_info == FTS_DP) {
355 * We are nearly finished with this directory. If we
356 * didn't actually copy it, or otherwise don't need to
357 * change its attributes, then we are done.
359 if (!curr->fts_number)
362 * If -p is in effect, set all the attributes.
363 * Otherwise, set the correct permissions, limited
364 * by the umask. Optimise by avoiding a chmod()
365 * if possible (which is usually the case if we
366 * made the directory). Note that mkdir() does not
367 * honour setuid, setgid and sticky bits, but we
368 * normally want to preserve them on directories.
371 if (setfile(curr->fts_statp, -1))
373 if (preserve_dir_acls(curr->fts_statp,
374 curr->fts_accpath, to.p_path) != 0)
377 mode = curr->fts_statp->st_mode;
378 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
379 ((mode | S_IRWXU) & mask) != (mode & mask))
380 if (chmod(to.p_path, mode & mask) != 0){
381 warn("chmod: %s", to.p_path);
388 /* Not an error but need to remember it happened */
389 if (stat(to.p_path, &to_stat) == -1)
392 if (to_stat.st_dev == curr->fts_statp->st_dev &&
393 to_stat.st_ino == curr->fts_statp->st_ino) {
394 warnx("%s and %s are identical (not copied).",
395 to.p_path, curr->fts_path);
397 if (S_ISDIR(curr->fts_statp->st_mode))
398 (void)fts_set(ftsp, curr, FTS_SKIP);
401 if (!S_ISDIR(curr->fts_statp->st_mode) &&
402 S_ISDIR(to_stat.st_mode)) {
403 warnx("cannot overwrite directory %s with "
405 to.p_path, curr->fts_path);
412 switch (curr->fts_statp->st_mode & S_IFMT) {
414 /* Catch special case of a non-dangling symlink */
415 if ((fts_options & FTS_LOGICAL) ||
416 ((fts_options & FTS_COMFOLLOW) &&
417 curr->fts_level == 0)) {
418 if (copy_file(curr, dne))
421 if (copy_link(curr, !dne))
427 warnx("%s is a directory (not copied).",
429 (void)fts_set(ftsp, curr, FTS_SKIP);
434 * If the directory doesn't exist, create the new
435 * one with the from file mode plus owner RWX bits,
436 * modified by the umask. Trade-off between being
437 * able to write the directory (if from directory is
438 * 555) and not causing a permissions race. If the
439 * umask blocks owner writes, we fail..
443 curr->fts_statp->st_mode | S_IRWXU) < 0)
444 err(1, "%s", to.p_path);
445 } else if (!S_ISDIR(to_stat.st_mode)) {
447 err(1, "%s", to.p_path);
450 * Arrange to correct directory attributes later
451 * (in the post-order phase) if this is a new
452 * directory, or if the -p flag is in effect.
454 curr->fts_number = pflag || dne;
459 if (copy_special(curr->fts_statp, !dne))
462 if (copy_file(curr, dne))
467 warnx("%s is a socket (not copied).",
472 if (copy_fifo(curr->fts_statp, !dne))
475 if (copy_file(curr, dne))
480 if (copy_file(curr, dne))
485 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
495 * The comparison function for the copy order. The order is to copy
496 * non-directory files before directory files. The reason for this
497 * is because files tend to be in the same cylinder group as their
498 * parent directory, whereas directories tend not to be. Copying the
499 * files first reduces seeking.
502 mastercmp(const FTSENT * const *a, const FTSENT * const *b)
506 a_info = (*a)->fts_info;
507 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
509 b_info = (*b)->fts_info;
510 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)
520 siginfo(int sig __unused)