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 1.7 2004/07/22 13:19:26 asmodai 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, fts_options, r;
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;
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 STRIP_TRAILING_SLASH(to);
176 to.target_end = to.p_end;
178 /* Set end of argument list for fts(3). */
182 * Cp has two distinct cases:
184 * cp [-R] source target
185 * cp [-R] source1 ... sourceN directory
187 * In both cases, source can be either a file or a directory.
189 * In (1), the target becomes a copy of the source. That is, if the
190 * source is a file, the target will be a file, and likewise for
193 * In (2), the real target is not directory, but "directory/source".
195 r = stat(to.p_path, &to_stat);
196 if (r == -1 && errno != ENOENT)
197 err(1, "%s", to.p_path);
198 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
200 * Case (1). Target is not a directory.
207 * Need to detect the case:
209 * Where dir is a directory and foo does not exist, where
210 * we want pathname concatenations turned on but not for
211 * the initial mkdir().
214 if (rflag || (Rflag && (Lflag || Hflag)))
215 stat(*argv, &tmp_stat);
217 lstat(*argv, &tmp_stat);
219 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
227 * Case (2). Target is a directory.
231 exit (copy(argv, type, fts_options));
235 copy(argv, type, fts_options)
243 int base = 0, dne, badcp, nlen, rval;
244 char *p, *target_mid;
248 * Keep an inverted copy of the umask, for use in correcting
249 * permissions on created directories when not using -p.
254 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
256 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
257 switch (curr->fts_info) {
262 curr->fts_path, strerror(curr->fts_errno));
265 case FTS_DC: /* Warn, continue. */
266 warnx("%s: directory causes a cycle", curr->fts_path);
272 * If we are in case (2) or (3) above, we need to append the
273 * source name to the target name.
275 if (type != FILE_TO_FILE) {
277 * Need to remember the roots of traversals to create
278 * correct pathnames. If there's a directory being
279 * copied to a non-existent directory, e.g.
280 * cp -R a/dir noexist
281 * the resulting path name should be noexist/foo, not
282 * noexist/dir/foo (where foo is a file in dir), which
283 * is the case where the target exists.
285 * Also, check for "..". This is for correct path
286 * concatenation for paths ending in "..", e.g.
288 * Paths ending in ".." are changed to ".". This is
289 * tricky, but seems the easiest way to fix the problem.
292 * Since the first level MUST be FTS_ROOTLEVEL, base
293 * is always initialized.
295 if (curr->fts_level == FTS_ROOTLEVEL) {
296 if (type != DIR_TO_DNE) {
297 p = strrchr(curr->fts_path, '/');
298 base = (p == NULL) ? 0 :
299 (int)(p - curr->fts_path + 1);
301 if (!strcmp(&curr->fts_path[base],
305 base = curr->fts_pathlen;
308 p = &curr->fts_path[base];
309 nlen = curr->fts_pathlen - base;
310 target_mid = to.target_end;
311 if (*p != '/' && target_mid[-1] != '/')
314 if (target_mid - to.p_path + nlen >= PATH_MAX) {
315 warnx("%s%s: name too long (not copied)",
320 (void)strncat(target_mid, p, nlen);
321 to.p_end = target_mid + nlen;
323 STRIP_TRAILING_SLASH(to);
326 if (curr->fts_info == FTS_DP) {
328 * We are nearly finished with this directory. If we
329 * didn't actually copy it, or otherwise don't need to
330 * change its attributes, then we are done.
332 if (!curr->fts_number)
335 * If -p is in effect, set all the attributes.
336 * Otherwise, set the correct permissions, limited
337 * by the umask. Optimise by avoiding a chmod()
338 * if possible (which is usually the case if we
339 * made the directory). Note that mkdir() does not
340 * honour setuid, setgid and sticky bits, but we
341 * normally want to preserve them on directories.
344 if (setfile(curr->fts_statp, 0))
347 mode = curr->fts_statp->st_mode;
348 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
349 ((mode | S_IRWXU) & mask) != (mode & mask))
350 if (chmod(to.p_path, mode & mask) != 0){
351 warn("chmod: %s", to.p_path);
358 /* Not an error but need to remember it happened */
359 if (stat(to.p_path, &to_stat) == -1)
362 if (to_stat.st_dev == curr->fts_statp->st_dev &&
363 to_stat.st_ino == curr->fts_statp->st_ino) {
364 warnx("%s and %s are identical (not copied).",
365 to.p_path, curr->fts_path);
367 if (S_ISDIR(curr->fts_statp->st_mode))
368 (void)fts_set(ftsp, curr, FTS_SKIP);
371 if (!S_ISDIR(curr->fts_statp->st_mode) &&
372 S_ISDIR(to_stat.st_mode)) {
373 warnx("cannot overwrite directory %s with non-directory %s",
374 to.p_path, curr->fts_path);
381 switch (curr->fts_statp->st_mode & S_IFMT) {
383 if (copy_link(curr, !dne))
387 if (!Rflag && !rflag) {
388 warnx("%s is a directory (not copied).",
390 (void)fts_set(ftsp, curr, FTS_SKIP);
395 * If the directory doesn't exist, create the new
396 * one with the from file mode plus owner RWX bits,
397 * modified by the umask. Trade-off between being
398 * able to write the directory (if from directory is
399 * 555) and not causing a permissions race. If the
400 * umask blocks owner writes, we fail..
404 curr->fts_statp->st_mode | S_IRWXU) < 0)
405 err(1, "%s", to.p_path);
406 } else if (!S_ISDIR(to_stat.st_mode)) {
408 err(1, "%s", to.p_path);
411 * Arrange to correct directory attributes later
412 * (in the post-order phase) if this is a new
413 * directory, or if the -p flag is in effect.
415 curr->fts_number = pflag || dne;
420 if (copy_special(curr->fts_statp, !dne))
423 if (copy_file(curr, dne))
429 if (copy_fifo(curr->fts_statp, !dne))
432 if (copy_file(curr, dne))
437 if (copy_file(curr, dne))
442 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
451 * The comparison function for the copy order. The order is to copy
452 * non-directory files before directory files. The reason for this
453 * is because files tend to be in the same cylinder group as their
454 * parent directory, whereas directories tend not to be. Copying the
455 * files first reduces seeking.
458 mastercmp(const FTSENT **a, const FTSENT **b)
462 a_info = (*a)->fts_info;
463 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
465 b_info = (*b)->fts_info;
466 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)