2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
56 #define cp_pct(x, y) ((y == 0) ? 0 : (int)(100.0 * (x) / (y)))
59 * Memory strategy threshold, in pages: if physmem is larger then this, use a
62 #define PHYSPAGES_THRESHOLD (32*1024)
64 /* Maximum buffer size in bytes - do not allow it to grow larger than this. */
65 #define BUFSIZE_MAX (2*1024*1024)
68 * Small (default) buffer size in bytes. It's inefficient for this to be
69 * smaller than MAXPHYS.
71 #define BUFSIZE_SMALL (MAXPHYS)
74 copy_fallback(int from_fd, int to_fd)
76 static char *buf = NULL;
77 static size_t bufsize;
78 ssize_t rcount, wresid, wcount = 0;
82 if (sysconf(_SC_PHYS_PAGES) > PHYSPAGES_THRESHOLD)
83 bufsize = MIN(BUFSIZE_MAX, MAXPHYS * 8);
85 bufsize = BUFSIZE_SMALL;
86 buf = malloc(bufsize);
88 err(1, "Not enough memory");
90 rcount = read(from_fd, buf, bufsize);
93 for (bufp = buf, wresid = rcount; ; bufp += wcount, wresid -= wcount) {
94 wcount = write(to_fd, bufp, wresid);
97 if (wcount >= (ssize_t)wresid)
100 return (wcount < 0 ? wcount : rcount);
104 copy_file(const FTSENT *entp, int dne)
109 int ch, checkch, from_fd, rval, to_fd;
110 int use_copy_file_range = 1;
112 from_fd = to_fd = -1;
113 if (!lflag && !sflag &&
114 (from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
115 warn("%s", entp->fts_path);
119 fs = entp->fts_statp;
122 * If the file exists and we're interactive, verify with the user.
123 * If the file DNE, set the mode to be the from file, minus setuid
124 * bits, modified by the umask; arguably wrong, but it makes copying
125 * executables work right and it's been that way forever. (The
126 * other choice is 666 or'ed with the execute bits on the from file
127 * modified by the umask.)
130 #define YESNO "(y/n [n]) "
133 printf("%s not overwritten\n", to.p_path);
137 (void)fprintf(stderr, "overwrite %s? %s",
139 checkch = ch = getchar();
140 while (ch != '\n' && ch != EOF)
142 if (checkch != 'y' && checkch != 'Y') {
143 (void)fprintf(stderr, "not overwritten\n");
151 * Remove existing destination file name create a new
154 (void)unlink(to.p_path);
155 if (!lflag && !sflag) {
156 to_fd = open(to.p_path,
157 O_WRONLY | O_TRUNC | O_CREAT,
158 fs->st_mode & ~(S_ISUID | S_ISGID));
160 } else if (!lflag && !sflag) {
161 /* Overwrite existing destination file name. */
162 to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
164 } else if (!lflag && !sflag) {
165 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
166 fs->st_mode & ~(S_ISUID | S_ISGID));
169 if (!lflag && !sflag && to_fd == -1) {
170 warn("%s", to.p_path);
177 if (!lflag && !sflag) {
180 if (use_copy_file_range) {
181 wcount = copy_file_range(from_fd, NULL,
182 to_fd, NULL, SSIZE_MAX, 0);
183 if (wcount < 0 && errno == EINVAL) {
184 /* Prob a non-seekable FD */
185 use_copy_file_range = 0;
188 if (!use_copy_file_range) {
189 wcount = copy_fallback(from_fd, to_fd);
194 (void)fprintf(stderr,
196 entp->fts_path, to.p_path,
197 cp_pct(wtotal, fs->st_size));
199 } while (wcount > 0);
201 warn("%s", entp->fts_path);
205 if (link(entp->fts_path, to.p_path)) {
206 warn("%s", to.p_path);
210 if (symlink(entp->fts_path, to.p_path)) {
211 warn("%s", to.p_path);
217 * Don't remove the target even after an error. The target might
218 * not be a regular file, or its attributes might be important,
219 * or its contents might be irreplaceable. It would only be safe
220 * to remove it if we created it and its length is 0.
223 if (!lflag && !sflag) {
224 if (pflag && setfile(fs, to_fd))
226 if (pflag && preserve_fd_acls(from_fd, to_fd) != 0)
229 warn("%s", to.p_path);
236 (void)close(from_fd);
241 copy_link(const FTSENT *p, int exists)
244 char llink[PATH_MAX];
246 if (exists && nflag) {
248 printf("%s not overwritten\n", to.p_path);
251 if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) {
252 warn("readlink: %s", p->fts_path);
256 if (exists && unlink(to.p_path)) {
257 warn("unlink: %s", to.p_path);
260 if (symlink(llink, to.p_path)) {
261 warn("symlink: %s", llink);
264 return (pflag ? setfile(p->fts_statp, -1) : 0);
268 copy_fifo(struct stat *from_stat, int exists)
271 if (exists && nflag) {
273 printf("%s not overwritten\n", to.p_path);
276 if (exists && unlink(to.p_path)) {
277 warn("unlink: %s", to.p_path);
280 if (mkfifo(to.p_path, from_stat->st_mode)) {
281 warn("mkfifo: %s", to.p_path);
284 return (pflag ? setfile(from_stat, -1) : 0);
288 copy_special(struct stat *from_stat, int exists)
291 if (exists && nflag) {
293 printf("%s not overwritten\n", to.p_path);
296 if (exists && unlink(to.p_path)) {
297 warn("unlink: %s", to.p_path);
300 if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
301 warn("mknod: %s", to.p_path);
304 return (pflag ? setfile(from_stat, -1) : 0);
308 setfile(struct stat *fs, int fd)
310 static struct timespec tspec[2];
312 int rval, gotstat, islink, fdval;
316 islink = !fdval && S_ISLNK(fs->st_mode);
317 fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX |
318 S_IRWXU | S_IRWXG | S_IRWXO;
320 tspec[0] = fs->st_atim;
321 tspec[1] = fs->st_mtim;
322 if (fdval ? futimens(fd, tspec) : utimensat(AT_FDCWD, to.p_path, tspec,
323 islink ? AT_SYMLINK_NOFOLLOW : 0)) {
324 warn("utimensat: %s", to.p_path);
327 if (fdval ? fstat(fd, &ts) :
328 (islink ? lstat(to.p_path, &ts) : stat(to.p_path, &ts)))
332 ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX |
333 S_IRWXU | S_IRWXG | S_IRWXO;
336 * Changing the ownership probably won't succeed, unless we're root
337 * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
338 * the mode; current BSD behavior is to remove all setuid bits on
339 * chown. If chown fails, lose setuid/setgid bits.
341 if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid)
342 if (fdval ? fchown(fd, fs->st_uid, fs->st_gid) :
343 (islink ? lchown(to.p_path, fs->st_uid, fs->st_gid) :
344 chown(to.p_path, fs->st_uid, fs->st_gid))) {
345 if (errno != EPERM) {
346 warn("chown: %s", to.p_path);
349 fs->st_mode &= ~(S_ISUID | S_ISGID);
352 if (!gotstat || fs->st_mode != ts.st_mode)
353 if (fdval ? fchmod(fd, fs->st_mode) :
354 (islink ? lchmod(to.p_path, fs->st_mode) :
355 chmod(to.p_path, fs->st_mode))) {
356 warn("chmod: %s", to.p_path);
360 if (!gotstat || fs->st_flags != ts.st_flags)
362 fchflags(fd, fs->st_flags) :
363 (islink ? lchflags(to.p_path, fs->st_flags) :
364 chflags(to.p_path, fs->st_flags))) {
365 warn("chflags: %s", to.p_path);
373 preserve_fd_acls(int source_fd, int dest_fd)
377 int acl_supported = 0, ret, trivial;
379 ret = fpathconf(source_fd, _PC_ACL_NFS4);
382 acl_type = ACL_TYPE_NFS4;
383 } else if (ret < 0 && errno != EINVAL) {
384 warn("fpathconf(..., _PC_ACL_NFS4) failed for %s", to.p_path);
387 if (acl_supported == 0) {
388 ret = fpathconf(source_fd, _PC_ACL_EXTENDED);
391 acl_type = ACL_TYPE_ACCESS;
392 } else if (ret < 0 && errno != EINVAL) {
393 warn("fpathconf(..., _PC_ACL_EXTENDED) failed for %s",
398 if (acl_supported == 0)
401 acl = acl_get_fd_np(source_fd, acl_type);
403 warn("failed to get acl entries while setting %s", to.p_path);
406 if (acl_is_trivial_np(acl, &trivial)) {
407 warn("acl_is_trivial() failed for %s", to.p_path);
415 if (acl_set_fd_np(dest_fd, acl, acl_type) < 0) {
416 warn("failed to set acl entries for %s", to.p_path);
425 preserve_dir_acls(struct stat *fs, char *source_dir, char *dest_dir)
427 acl_t (*aclgetf)(const char *, acl_type_t);
428 int (*aclsetf)(const char *, acl_type_t, acl_t);
432 int acl_supported = 0, ret, trivial;
434 ret = pathconf(source_dir, _PC_ACL_NFS4);
437 acl_type = ACL_TYPE_NFS4;
438 } else if (ret < 0 && errno != EINVAL) {
439 warn("fpathconf(..., _PC_ACL_NFS4) failed for %s", source_dir);
442 if (acl_supported == 0) {
443 ret = pathconf(source_dir, _PC_ACL_EXTENDED);
446 acl_type = ACL_TYPE_ACCESS;
447 } else if (ret < 0 && errno != EINVAL) {
448 warn("fpathconf(..., _PC_ACL_EXTENDED) failed for %s",
453 if (acl_supported == 0)
457 * If the file is a link we will not follow it.
459 if (S_ISLNK(fs->st_mode)) {
460 aclgetf = acl_get_link_np;
461 aclsetf = acl_set_link_np;
463 aclgetf = acl_get_file;
464 aclsetf = acl_set_file;
466 if (acl_type == ACL_TYPE_ACCESS) {
468 * Even if there is no ACL_TYPE_DEFAULT entry here, a zero
469 * size ACL will be returned. So it is not safe to simply
470 * check the pointer to see if the default ACL is present.
472 acl = aclgetf(source_dir, ACL_TYPE_DEFAULT);
474 warn("failed to get default acl entries on %s",
478 aclp = &acl->ats_acl;
479 if (aclp->acl_cnt != 0 && aclsetf(dest_dir,
480 ACL_TYPE_DEFAULT, acl) < 0) {
481 warn("failed to set default acl entries on %s",
488 acl = aclgetf(source_dir, acl_type);
490 warn("failed to get acl entries on %s", source_dir);
493 if (acl_is_trivial_np(acl, &trivial)) {
494 warn("acl_is_trivial() failed on %s", source_dir);
502 if (aclsetf(dest_dir, acl_type, acl) < 0) {
503 warn("failed to set acl entries on %s", dest_dir);
515 (void)fprintf(stderr, "%s\n%s\n",
516 "usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpsvx] "
517 "source_file target_file",
518 " cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpsvx] "