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 1.10 2005/02/14 02:09:12 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 fflag, iflag, nflag, pflag, vflag;
79 static int Rflag, rflag;
81 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
83 static int copy (char **, enum op, int);
84 static int mastercmp (const FTSENT **, const FTSENT **);
87 main(int argc, char **argv)
89 struct stat to_stat, tmp_stat;
91 int Hflag, Lflag, Pflag, ch, has_trailing_slash, r, fts_options;
94 Hflag = Lflag = Pflag = 0;
95 while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
143 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
147 "the -R and -r options may not be specified together.");
148 if (Hflag || Lflag || Pflag)
150 "the -H, -L, and -P options may not be specified with the -r option.");
151 fts_options &= ~FTS_PHYSICAL;
152 fts_options |= FTS_LOGICAL;
156 fts_options |= FTS_COMFOLLOW;
158 fts_options &= ~FTS_PHYSICAL;
159 fts_options |= FTS_LOGICAL;
162 fts_options &= ~FTS_PHYSICAL;
163 fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
166 /* Save the target base in "to". */
167 target = argv[--argc];
168 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
169 errx(1, "%s: name too long", target);
170 to.p_end = to.p_path + strlen(to.p_path);
171 if (to.p_path == to.p_end) {
175 has_trailing_slash = (to.p_end[-1] == '/');
176 if (has_trailing_slash)
177 STRIP_TRAILING_SLASH(to);
178 to.target_end = to.p_end;
180 /* Set end of argument list for fts(3). */
184 * Cp has two distinct cases:
186 * cp [-R] source target
187 * cp [-R] source1 ... sourceN directory
189 * In both cases, source can be either a file or a directory.
191 * In (1), the target becomes a copy of the source. That is, if the
192 * source is a file, the target will be a file, and likewise for
195 * In (2), the real target is not directory, but "directory/source".
197 r = stat(to.p_path, &to_stat);
198 if (r == -1 && errno != ENOENT)
199 err(1, "%s", to.p_path);
200 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
202 * Case (1). Target is not a directory.
209 * Need to detect the case:
211 * Where dir is a directory and foo does not exist, where
212 * we want pathname concatenations turned on but not for
213 * the initial mkdir().
216 if (rflag || (Rflag && (Lflag || Hflag)))
217 stat(*argv, &tmp_stat);
219 lstat(*argv, &tmp_stat);
221 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
228 if (has_trailing_slash && type == FILE_TO_FILE) {
230 errx(1, "directory %s does not exist", to.p_path);
232 errx(1, "%s is not a directory", to.p_path);
236 * Case (2). Target is a directory.
240 exit (copy(argv, type, fts_options));
244 copy(char **argv, enum op type, int fts_options)
249 int base, dne, badcp, nlen, rval;
250 char *p, *target_mid;
254 * Keep an inverted copy of the umask, for use in correcting
255 * permissions on created directories when not using -p.
261 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
263 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
264 switch (curr->fts_info) {
269 curr->fts_path, strerror(curr->fts_errno));
272 case FTS_DC: /* Warn, continue. */
273 warnx("%s: directory causes a cycle", curr->fts_path);
279 * If we are in case (2) or (3) above, we need to append the
280 * source name to the target name.
282 if (type != FILE_TO_FILE) {
284 * Need to remember the roots of traversals to create
285 * correct pathnames. If there's a directory being
286 * copied to a non-existent directory, e.g.
287 * cp -R a/dir noexist
288 * the resulting path name should be noexist/foo, not
289 * noexist/dir/foo (where foo is a file in dir), which
290 * is the case where the target exists.
292 * Also, check for "..". This is for correct path
293 * concatenation for paths ending in "..", e.g.
295 * Paths ending in ".." are changed to ".". This is
296 * tricky, but seems the easiest way to fix the problem.
299 * Since the first level MUST be FTS_ROOTLEVEL, base
300 * is always initialized.
302 if (curr->fts_level == FTS_ROOTLEVEL) {
303 if (type != DIR_TO_DNE) {
304 p = strrchr(curr->fts_path, '/');
305 base = (p == NULL) ? 0 :
306 (int)(p - curr->fts_path + 1);
308 if (!strcmp(&curr->fts_path[base],
312 base = curr->fts_pathlen;
315 p = &curr->fts_path[base];
316 nlen = curr->fts_pathlen - base;
317 target_mid = to.target_end;
318 if (*p != '/' && target_mid[-1] != '/')
321 if (target_mid - to.p_path + nlen >= PATH_MAX) {
322 warnx("%s%s: name too long (not copied)",
327 strncat(target_mid, p, nlen);
328 to.p_end = target_mid + nlen;
330 STRIP_TRAILING_SLASH(to);
333 if (curr->fts_info == FTS_DP) {
335 * We are nearly finished with this directory. If we
336 * didn't actually copy it, or otherwise don't need to
337 * change its attributes, then we are done.
339 if (!curr->fts_number)
342 * If -p is in effect, set all the attributes.
343 * Otherwise, set the correct permissions, limited
344 * by the umask. Optimise by avoiding a chmod()
345 * if possible (which is usually the case if we
346 * made the directory). Note that mkdir() does not
347 * honour setuid, setgid and sticky bits, but we
348 * normally want to preserve them on directories.
351 if (setfile(curr->fts_statp, -1))
354 mode = curr->fts_statp->st_mode;
355 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
356 ((mode | S_IRWXU) & mask) != (mode & mask))
357 if (chmod(to.p_path, mode & mask) != 0){
358 warn("chmod: %s", to.p_path);
365 /* Not an error but need to remember it happened */
366 if (stat(to.p_path, &to_stat) == -1)
369 if (to_stat.st_dev == curr->fts_statp->st_dev &&
370 to_stat.st_ino == curr->fts_statp->st_ino) {
371 warnx("%s and %s are identical (not copied).",
372 to.p_path, curr->fts_path);
374 if (S_ISDIR(curr->fts_statp->st_mode))
375 fts_set(ftsp, curr, FTS_SKIP);
378 if (!S_ISDIR(curr->fts_statp->st_mode) &&
379 S_ISDIR(to_stat.st_mode)) {
380 warnx("cannot overwrite directory %s with non-directory %s",
381 to.p_path, curr->fts_path);
388 switch (curr->fts_statp->st_mode & S_IFMT) {
390 /* Catch special case of a non-dangling symlink */
391 if ((fts_options & FTS_LOGICAL) ||
392 ((fts_options & FTS_COMFOLLOW) &&
393 curr->fts_level == 0)) {
394 if (copy_file(curr, dne))
397 if (copy_link(curr, !dne))
402 if (!Rflag && !rflag) {
403 warnx("%s is a directory (not copied).",
405 fts_set(ftsp, curr, FTS_SKIP);
410 * If the directory doesn't exist, create the new
411 * one with the from file mode plus owner RWX bits,
412 * modified by the umask. Trade-off between being
413 * able to write the directory (if from directory is
414 * 555) and not causing a permissions race. If the
415 * umask blocks owner writes, we fail..
419 curr->fts_statp->st_mode | S_IRWXU) < 0)
420 err(1, "%s", to.p_path);
421 } else if (!S_ISDIR(to_stat.st_mode)) {
423 err(1, "%s", to.p_path);
426 * Arrange to correct directory attributes later
427 * (in the post-order phase) if this is a new
428 * directory, or if the -p flag is in effect.
430 curr->fts_number = pflag || dne;
435 if (copy_special(curr->fts_statp, !dne))
438 if (copy_file(curr, dne))
444 if (copy_fifo(curr->fts_statp, !dne))
447 if (copy_file(curr, dne))
452 if (copy_file(curr, dne))
457 printf("%s -> %s\n", curr->fts_path, to.p_path);
466 * The comparison function for the copy order. The order is to copy
467 * non-directory files before directory files. The reason for this
468 * is because files tend to be in the same cylinder group as their
469 * parent directory, whereas directories tend not to be. Copying the
470 * files first reduces seeking.
473 mastercmp(const FTSENT **a, const FTSENT **b)
477 a_info = (*a)->fts_info;
478 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
480 b_info = (*b)->fts_info;
481 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)