2 * Copyright (c) 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94";
38 static const char rcsid[] =
39 "$FreeBSD: src/bin/cp/utils.c,v 1.27.2.6 2002/08/10 13:20:19 johan Exp $";
42 #include <sys/param.h>
45 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
66 static char buf[MAXBSIZE];
68 int ch, checkch, from_fd, rcount, rval, to_fd, wcount, wresid;
70 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
74 if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
75 warn("%s", entp->fts_path);
82 * If the file exists and we're interactive, verify with the user.
83 * If the file DNE, set the mode to be the from file, minus setuid
84 * bits, modified by the umask; arguably wrong, but it makes copying
85 * executables work right and it's been that way forever. (The
86 * other choice is 666 or'ed with the execute bits on the from file
87 * modified by the umask.)
90 #define YESNO "(y/n [n]) "
93 printf("%s not overwritten\n", to.p_path);
96 (void)fprintf(stderr, "overwrite %s? %s",
98 checkch = ch = getchar();
99 while (ch != '\n' && ch != EOF)
101 if (checkch != 'y' && checkch != 'Y') {
102 (void)close(from_fd);
103 (void)fprintf(stderr, "not overwritten\n");
109 /* remove existing destination file name,
110 * create a new file */
111 (void)unlink(to.p_path);
112 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
113 fs->st_mode & ~(S_ISUID | S_ISGID));
115 /* overwrite existing destination file name */
116 to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
118 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
119 fs->st_mode & ~(S_ISUID | S_ISGID));
122 warn("%s", to.p_path);
123 (void)close(from_fd);
130 * Mmap and write if less than 8M (the limit is so we don't totally
131 * trash memory on big files. This is really a minor hack, but it
132 * wins some CPU back.
134 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
135 if (S_ISREG(fs->st_mode) && fs->st_size <= 8 * 1048576) {
136 if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
137 MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
138 warn("%s", entp->fts_path);
141 for (bufp = p, wresid = fs->st_size; ;
142 bufp += wcount, wresid -= wcount) {
143 wcount = write(to_fd, bufp, wresid);
144 if (wcount >= wresid || wcount <= 0)
147 if (wcount != wresid) {
148 warn("%s", to.p_path);
151 /* Some systems don't unmap on close(2). */
152 if (munmap(p, fs->st_size) < 0) {
153 warn("%s", entp->fts_path);
160 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
161 for (bufp = buf, wresid = rcount; ;
162 bufp += wcount, wresid -= wcount) {
163 wcount = write(to_fd, bufp, wresid);
164 if (wcount >= wresid || wcount <= 0)
167 if (wcount != wresid) {
168 warn("%s", to.p_path);
174 warn("%s", entp->fts_path);
180 * Don't remove the target even after an error. The target might
181 * not be a regular file, or its attributes might be important,
182 * or its contents might be irreplaceable. It would only be safe
183 * to remove it if we created it and its length is 0.
186 if (pflag && setfile(fs, to_fd))
188 (void)close(from_fd);
190 warn("%s", to.p_path);
204 if ((len = readlink(p->fts_path, link, sizeof(link) - 1)) == -1) {
205 warn("readlink: %s", p->fts_path);
209 if (exists && unlink(to.p_path)) {
210 warn("unlink: %s", to.p_path);
213 if (symlink(link, to.p_path)) {
214 warn("symlink: %s", link);
221 copy_fifo(from_stat, exists)
222 struct stat *from_stat;
225 if (exists && unlink(to.p_path)) {
226 warn("unlink: %s", to.p_path);
229 if (mkfifo(to.p_path, from_stat->st_mode)) {
230 warn("mkfifo: %s", to.p_path);
233 return (pflag ? setfile(from_stat, 0) : 0);
237 copy_special(from_stat, exists)
238 struct stat *from_stat;
241 if (exists && unlink(to.p_path)) {
242 warn("unlink: %s", to.p_path);
245 if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
246 warn("mknod: %s", to.p_path);
249 return (pflag ? setfile(from_stat, 0) : 0);
253 (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
257 register struct stat *fs;
260 static struct timeval tv[2];
266 fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX |
267 S_IRWXU | S_IRWXG | S_IRWXO;
269 TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
270 TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
271 if (utimes(to.p_path, tv)) {
272 warn("utimes: %s", to.p_path);
275 if (fd ? fstat(fd, &ts) : stat(to.p_path, &ts))
279 ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX |
280 S_IRWXU | S_IRWXG | S_IRWXO;
283 * Changing the ownership probably won't succeed, unless we're root
284 * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
285 * the mode; current BSD behavior is to remove all setuid bits on
286 * chown. If chown fails, lose setuid/setgid bits.
288 if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid)
289 if (fd ? fchown(fd, fs->st_uid, fs->st_gid) :
290 chown(to.p_path, fs->st_uid, fs->st_gid)) {
291 if (errno != EPERM) {
292 warn("chown: %s", to.p_path);
295 fs->st_mode &= ~(S_ISUID | S_ISGID);
298 if (!gotstat || fs->st_mode != ts.st_mode)
299 if (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) {
300 warn("chmod: %s", to.p_path);
304 if (!gotstat || fs->st_flags != ts.st_flags)
306 fchflags(fd, fs->st_flags) : chflags(to.p_path, fs->st_flags)) {
307 warn("chflags: %s", to.p_path);
318 (void)fprintf(stderr, "%s\n%s\n",
319 "usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-pv] src target",
320 " cp [-R [-H | -L | -P]] [-f | -i | -n] [-pv] src1 ... srcN directory");