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
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)cp.c 8.2 (Berkeley) 4/1/94
38 * $FreeBSD: src/bin/cp/cp.c,v 1.24.2.7 2002/09/24 12:41:04 mckay Exp $
39 * $DragonFly: src/bin/cp/cp.c,v 1.4 2004/03/19 17:30:59 cpressey Exp $
43 * Cp copies source files to target files.
45 * The global PATH_T structure "to" always contains the path to the
46 * current target file. Since fts(3) does not change directories,
47 * this path can be either absolute or dot-relative.
49 * The basic algorithm is to initialize "to" and use fts(3) to traverse
50 * the file hierarchy rooted in the argument list. A trivial case is the
51 * case of 'cp file1 file2'. The more interesting case is the case of
52 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
53 * path (relative to the root of the traversal) is appended to dir (stored
54 * in "to") to form the final target path.
57 #include <sys/param.h>
71 #define STRIP_TRAILING_SLASH(p) { \
72 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
76 PATH_T to = { to.p_path, to.p_path, "" };
78 int Rflag, fflag, iflag, nflag, pflag, rflag, vflag;
80 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
82 int copy (char *[], enum op, int);
83 int mastercmp (const FTSENT **, const FTSENT **);
86 main(int argc, char *argv[])
88 struct stat to_stat, tmp_stat;
90 int Hflag, Lflag, Pflag, ch, fts_options, r;
93 Hflag = Lflag = Pflag = 0;
94 while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
142 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
146 "the -R and -r options may not be specified together.");
147 if (Hflag || Lflag || Pflag)
149 "the -H, -L, and -P options may not be specified with the -r option.");
150 fts_options &= ~FTS_PHYSICAL;
151 fts_options |= FTS_LOGICAL;
155 fts_options |= FTS_COMFOLLOW;
157 fts_options &= ~FTS_PHYSICAL;
158 fts_options |= FTS_LOGICAL;
161 fts_options &= ~FTS_PHYSICAL;
162 fts_options |= FTS_LOGICAL;
165 /* Save the target base in "to". */
166 target = argv[--argc];
167 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
168 errx(1, "%s: name too long", target);
169 to.p_end = to.p_path + strlen(to.p_path);
170 if (to.p_path == to.p_end) {
174 STRIP_TRAILING_SLASH(to);
175 to.target_end = to.p_end;
177 /* Set end of argument list for fts(3). */
181 * Cp has two distinct cases:
183 * cp [-R] source target
184 * cp [-R] source1 ... sourceN directory
186 * In both cases, source can be either a file or a directory.
188 * In (1), the target becomes a copy of the source. That is, if the
189 * source is a file, the target will be a file, and likewise for
192 * In (2), the real target is not directory, but "directory/source".
194 r = stat(to.p_path, &to_stat);
195 if (r == -1 && errno != ENOENT)
196 err(1, "%s", to.p_path);
197 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
199 * Case (1). Target is not a directory.
206 * Need to detect the case:
208 * Where dir is a directory and foo does not exist, where
209 * we want pathname concatenations turned on but not for
210 * the initial mkdir().
213 if (rflag || (Rflag && (Lflag || Hflag)))
214 stat(*argv, &tmp_stat);
216 lstat(*argv, &tmp_stat);
218 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
226 * Case (2). Target is a directory.
230 exit (copy(argv, type, fts_options));
234 copy(argv, type, fts_options)
242 int base = 0, dne, badcp, nlen, rval;
243 char *p, *target_mid;
247 * Keep an inverted copy of the umask, for use in correcting
248 * permissions on created directories when not using -p.
253 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
255 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
256 switch (curr->fts_info) {
261 curr->fts_path, strerror(curr->fts_errno));
264 case FTS_DC: /* Warn, continue. */
265 warnx("%s: directory causes a cycle", curr->fts_path);
271 * If we are in case (2) or (3) above, we need to append the
272 * source name to the target name.
274 if (type != FILE_TO_FILE) {
276 * Need to remember the roots of traversals to create
277 * correct pathnames. If there's a directory being
278 * copied to a non-existent directory, e.g.
279 * cp -R a/dir noexist
280 * the resulting path name should be noexist/foo, not
281 * noexist/dir/foo (where foo is a file in dir), which
282 * is the case where the target exists.
284 * Also, check for "..". This is for correct path
285 * concatenation for paths ending in "..", e.g.
287 * Paths ending in ".." are changed to ".". This is
288 * tricky, but seems the easiest way to fix the problem.
291 * Since the first level MUST be FTS_ROOTLEVEL, base
292 * is always initialized.
294 if (curr->fts_level == FTS_ROOTLEVEL) {
295 if (type != DIR_TO_DNE) {
296 p = strrchr(curr->fts_path, '/');
297 base = (p == NULL) ? 0 :
298 (int)(p - curr->fts_path + 1);
300 if (!strcmp(&curr->fts_path[base],
304 base = curr->fts_pathlen;
307 p = &curr->fts_path[base];
308 nlen = curr->fts_pathlen - base;
309 target_mid = to.target_end;
310 if (*p != '/' && target_mid[-1] != '/')
313 if (target_mid - to.p_path + nlen >= PATH_MAX) {
314 warnx("%s%s: name too long (not copied)",
319 (void)strncat(target_mid, p, nlen);
320 to.p_end = target_mid + nlen;
322 STRIP_TRAILING_SLASH(to);
325 if (curr->fts_info == FTS_DP) {
327 * We are nearly finished with this directory. If we
328 * didn't actually copy it, or otherwise don't need to
329 * change its attributes, then we are done.
331 if (!curr->fts_number)
334 * If -p is in effect, set all the attributes.
335 * Otherwise, set the correct permissions, limited
336 * by the umask. Optimise by avoiding a chmod()
337 * if possible (which is usually the case if we
338 * made the directory). Note that mkdir() does not
339 * honour setuid, setgid and sticky bits, but we
340 * normally want to preserve them on directories.
343 if (setfile(curr->fts_statp, 0))
346 mode = curr->fts_statp->st_mode;
347 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
348 ((mode | S_IRWXU) & mask) != (mode & mask))
349 if (chmod(to.p_path, mode & mask) != 0){
350 warn("chmod: %s", to.p_path);
357 /* Not an error but need to remember it happened */
358 if (stat(to.p_path, &to_stat) == -1)
361 if (to_stat.st_dev == curr->fts_statp->st_dev &&
362 to_stat.st_ino == curr->fts_statp->st_ino) {
363 warnx("%s and %s are identical (not copied).",
364 to.p_path, curr->fts_path);
366 if (S_ISDIR(curr->fts_statp->st_mode))
367 (void)fts_set(ftsp, curr, FTS_SKIP);
370 if (!S_ISDIR(curr->fts_statp->st_mode) &&
371 S_ISDIR(to_stat.st_mode)) {
372 warnx("cannot overwrite directory %s with non-directory %s",
373 to.p_path, curr->fts_path);
380 switch (curr->fts_statp->st_mode & S_IFMT) {
382 if (copy_link(curr, !dne))
386 if (!Rflag && !rflag) {
387 warnx("%s is a directory (not copied).",
389 (void)fts_set(ftsp, curr, FTS_SKIP);
394 * If the directory doesn't exist, create the new
395 * one with the from file mode plus owner RWX bits,
396 * modified by the umask. Trade-off between being
397 * able to write the directory (if from directory is
398 * 555) and not causing a permissions race. If the
399 * umask blocks owner writes, we fail..
403 curr->fts_statp->st_mode | S_IRWXU) < 0)
404 err(1, "%s", to.p_path);
405 } else if (!S_ISDIR(to_stat.st_mode)) {
407 err(1, "%s", to.p_path);
410 * Arrange to correct directory attributes later
411 * (in the post-order phase) if this is a new
412 * directory, or if the -p flag is in effect.
414 curr->fts_number = pflag || dne;
419 if (copy_special(curr->fts_statp, !dne))
422 if (copy_file(curr, dne))
428 if (copy_fifo(curr->fts_statp, !dne))
431 if (copy_file(curr, dne))
436 if (copy_file(curr, dne))
441 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
450 * The comparison function for the copy order. The order is to copy
451 * non-directory files before directory files. The reason for this
452 * is because files tend to be in the same cylinder group as their
453 * parent directory, whereas directories tend not to be. Copying the
454 * files first reduces seeking.
457 mastercmp(const FTSENT **a, const FTSENT **b)
461 a_info = (*a)->fts_info;
462 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
464 b_info = (*b)->fts_info;
465 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)