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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static char const copyright[] =
39 "@(#) Copyright (c) 1988, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94";
47 static const char rcsid[] =
48 "$FreeBSD: src/bin/cp/cp.c,v 1.24.2.7 2002/09/24 12:41:04 mckay Exp $";
52 * Cp copies source files to target files.
54 * The global PATH_T structure "to" always contains the path to the
55 * current target file. Since fts(3) does not change directories,
56 * this path can be either absolute or dot-relative.
58 * The basic algorithm is to initialize "to" and use fts(3) to traverse
59 * the file hierarchy rooted in the argument list. A trivial case is the
60 * case of 'cp file1 file2'. The more interesting case is the case of
61 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
62 * path (relative to the root of the traversal) is appended to dir (stored
63 * in "to") to form the final target path.
66 #include <sys/param.h>
80 #define STRIP_TRAILING_SLASH(p) { \
81 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
85 PATH_T to = { to.p_path, "", "" };
87 int Rflag, fflag, iflag, nflag, pflag, rflag, vflag;
89 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
91 int copy __P((char *[], enum op, int));
92 int mastercmp __P((const FTSENT **, const FTSENT **));
99 struct stat to_stat, tmp_stat;
101 int Hflag, Lflag, Pflag, ch, fts_options, r;
104 Hflag = Lflag = Pflag = 0;
105 while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
153 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
157 "the -R and -r options may not be specified together.");
158 if (Hflag || Lflag || Pflag)
160 "the -H, -L, and -P options may not be specified with the -r option.");
161 fts_options &= ~FTS_PHYSICAL;
162 fts_options |= FTS_LOGICAL;
166 fts_options |= FTS_COMFOLLOW;
168 fts_options &= ~FTS_PHYSICAL;
169 fts_options |= FTS_LOGICAL;
172 fts_options &= ~FTS_PHYSICAL;
173 fts_options |= FTS_LOGICAL;
176 /* Save the target base in "to". */
177 target = argv[--argc];
178 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
179 errx(1, "%s: name too long", target);
180 to.p_end = to.p_path + strlen(to.p_path);
181 if (to.p_path == to.p_end) {
185 STRIP_TRAILING_SLASH(to);
186 to.target_end = to.p_end;
188 /* Set end of argument list for fts(3). */
192 * Cp has two distinct cases:
194 * cp [-R] source target
195 * cp [-R] source1 ... sourceN directory
197 * In both cases, source can be either a file or a directory.
199 * In (1), the target becomes a copy of the source. That is, if the
200 * source is a file, the target will be a file, and likewise for
203 * In (2), the real target is not directory, but "directory/source".
205 r = stat(to.p_path, &to_stat);
206 if (r == -1 && errno != ENOENT)
207 err(1, "%s", to.p_path);
208 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
210 * Case (1). Target is not a directory.
217 * Need to detect the case:
219 * Where dir is a directory and foo does not exist, where
220 * we want pathname concatenations turned on but not for
221 * the initial mkdir().
224 if (rflag || (Rflag && (Lflag || Hflag)))
225 stat(*argv, &tmp_stat);
227 lstat(*argv, &tmp_stat);
229 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
237 * Case (2). Target is a directory.
241 exit (copy(argv, type, fts_options));
245 copy(argv, type, fts_options)
253 int base = 0, dne, badcp, nlen, rval;
254 char *p, *target_mid;
258 * Keep an inverted copy of the umask, for use in correcting
259 * permissions on created directories when not using -p.
264 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
266 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
267 switch (curr->fts_info) {
272 curr->fts_path, strerror(curr->fts_errno));
275 case FTS_DC: /* Warn, continue. */
276 warnx("%s: directory causes a cycle", curr->fts_path);
282 * If we are in case (2) or (3) above, we need to append the
283 * source name to the target name.
285 if (type != FILE_TO_FILE) {
287 * Need to remember the roots of traversals to create
288 * correct pathnames. If there's a directory being
289 * copied to a non-existent directory, e.g.
290 * cp -R a/dir noexist
291 * the resulting path name should be noexist/foo, not
292 * noexist/dir/foo (where foo is a file in dir), which
293 * is the case where the target exists.
295 * Also, check for "..". This is for correct path
296 * concatenation for paths ending in "..", e.g.
298 * Paths ending in ".." are changed to ".". This is
299 * tricky, but seems the easiest way to fix the problem.
302 * Since the first level MUST be FTS_ROOTLEVEL, base
303 * is always initialized.
305 if (curr->fts_level == FTS_ROOTLEVEL) {
306 if (type != DIR_TO_DNE) {
307 p = strrchr(curr->fts_path, '/');
308 base = (p == NULL) ? 0 :
309 (int)(p - curr->fts_path + 1);
311 if (!strcmp(&curr->fts_path[base],
315 base = curr->fts_pathlen;
318 p = &curr->fts_path[base];
319 nlen = curr->fts_pathlen - base;
320 target_mid = to.target_end;
321 if (*p != '/' && target_mid[-1] != '/')
324 if (target_mid - to.p_path + nlen >= PATH_MAX) {
325 warnx("%s%s: name too long (not copied)",
330 (void)strncat(target_mid, p, nlen);
331 to.p_end = target_mid + nlen;
333 STRIP_TRAILING_SLASH(to);
336 if (curr->fts_info == FTS_DP) {
338 * We are nearly finished with this directory. If we
339 * didn't actually copy it, or otherwise don't need to
340 * change its attributes, then we are done.
342 if (!curr->fts_number)
345 * If -p is in effect, set all the attributes.
346 * Otherwise, set the correct permissions, limited
347 * by the umask. Optimise by avoiding a chmod()
348 * if possible (which is usually the case if we
349 * made the directory). Note that mkdir() does not
350 * honour setuid, setgid and sticky bits, but we
351 * normally want to preserve them on directories.
354 if (setfile(curr->fts_statp, 0))
357 mode = curr->fts_statp->st_mode;
358 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
359 ((mode | S_IRWXU) & mask) != (mode & mask))
360 if (chmod(to.p_path, mode & mask) != 0){
361 warn("chmod: %s", to.p_path);
368 /* Not an error but need to remember it happened */
369 if (stat(to.p_path, &to_stat) == -1)
372 if (to_stat.st_dev == curr->fts_statp->st_dev &&
373 to_stat.st_ino == curr->fts_statp->st_ino) {
374 warnx("%s and %s are identical (not copied).",
375 to.p_path, curr->fts_path);
377 if (S_ISDIR(curr->fts_statp->st_mode))
378 (void)fts_set(ftsp, curr, FTS_SKIP);
381 if (!S_ISDIR(curr->fts_statp->st_mode) &&
382 S_ISDIR(to_stat.st_mode)) {
383 warnx("cannot overwrite directory %s with non-directory %s",
384 to.p_path, curr->fts_path);
391 switch (curr->fts_statp->st_mode & S_IFMT) {
393 if (copy_link(curr, !dne))
397 if (!Rflag && !rflag) {
398 warnx("%s is a directory (not copied).",
400 (void)fts_set(ftsp, curr, FTS_SKIP);
405 * If the directory doesn't exist, create the new
406 * one with the from file mode plus owner RWX bits,
407 * modified by the umask. Trade-off between being
408 * able to write the directory (if from directory is
409 * 555) and not causing a permissions race. If the
410 * umask blocks owner writes, we fail..
414 curr->fts_statp->st_mode | S_IRWXU) < 0)
415 err(1, "%s", to.p_path);
416 } else if (!S_ISDIR(to_stat.st_mode)) {
418 err(1, "%s", to.p_path);
421 * Arrange to correct directory attributes later
422 * (in the post-order phase) if this is a new
423 * directory, or if the -p flag is in effect.
425 curr->fts_number = pflag || dne;
430 if (copy_special(curr->fts_statp, !dne))
433 if (copy_file(curr, dne))
439 if (copy_fifo(curr->fts_statp, !dne))
442 if (copy_file(curr, dne))
447 if (copy_file(curr, dne))
452 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
461 * The comparison function for the copy order. The order is to copy
462 * non-directory files before directory files. The reason for this
463 * is because files tend to be in the same cylinder group as their
464 * parent directory, whereas directories tend not to be. Copying the
465 * files first reduces seeking.
469 const FTSENT **a, **b;
473 a_info = (*a)->fts_info;
474 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
476 b_info = (*b)->fts_info;
477 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)