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mv.c (36049) mv.c (36383)
1/*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Ken Smith of The State University of New York at Buffalo.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char const copyright[] =
39"@(#) Copyright (c) 1989, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
46#endif
47static const char rcsid[] =
1/*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Ken Smith of The State University of New York at Buffalo.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char const copyright[] =
39"@(#) Copyright (c) 1989, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
46#endif
47static const char rcsid[] =
48 "$Id$";
48 "$Id: mv.c,v 1.18 1998/05/15 06:25:17 charnier Exp $";
49#endif /* not lint */
50
51#include <sys/param.h>
52#include <sys/time.h>
53#include <sys/wait.h>
54#include <sys/stat.h>
55#include <sys/mount.h>
56
57#include <err.h>
58#include <errno.h>
59#include <fcntl.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <string.h>
63#include <unistd.h>
64
65#include "pathnames.h"
66
67int fflg, iflg;
68
69int copy __P((char *, char *));
70int do_move __P((char *, char *));
71int fastcopy __P((char *, char *, struct stat *));
72void usage __P((void));
73
74int
75main(argc, argv)
76 int argc;
77 char *argv[];
78{
79 register int baselen, len, rval;
80 register char *p, *endp;
81 struct stat sb;
82 int ch;
83 char path[MAXPATHLEN + 1];
84
85 while ((ch = getopt(argc, argv, "fi")) != -1)
86 switch (ch) {
87 case 'i':
88 iflg = 1;
89 fflg = 0;
90 break;
91 case 'f':
92 fflg = 1;
93 iflg = 0;
94 break;
95 default:
96 usage();
97 }
98 argc -= optind;
99 argv += optind;
100
101 if (argc < 2)
102 usage();
103
104 /*
105 * If the stat on the target fails or the target isn't a directory,
106 * try the move. More than 2 arguments is an error in this case.
107 */
108 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
109 if (argc > 2)
110 usage();
111 exit(do_move(argv[0], argv[1]));
112 }
113
114 /* It's a directory, move each file into it. */
115 (void)strcpy(path, argv[argc - 1]);
116 baselen = strlen(path);
117 endp = &path[baselen];
49#endif /* not lint */
50
51#include <sys/param.h>
52#include <sys/time.h>
53#include <sys/wait.h>
54#include <sys/stat.h>
55#include <sys/mount.h>
56
57#include <err.h>
58#include <errno.h>
59#include <fcntl.h>
60#include <stdio.h>
61#include <stdlib.h>
62#include <string.h>
63#include <unistd.h>
64
65#include "pathnames.h"
66
67int fflg, iflg;
68
69int copy __P((char *, char *));
70int do_move __P((char *, char *));
71int fastcopy __P((char *, char *, struct stat *));
72void usage __P((void));
73
74int
75main(argc, argv)
76 int argc;
77 char *argv[];
78{
79 register int baselen, len, rval;
80 register char *p, *endp;
81 struct stat sb;
82 int ch;
83 char path[MAXPATHLEN + 1];
84
85 while ((ch = getopt(argc, argv, "fi")) != -1)
86 switch (ch) {
87 case 'i':
88 iflg = 1;
89 fflg = 0;
90 break;
91 case 'f':
92 fflg = 1;
93 iflg = 0;
94 break;
95 default:
96 usage();
97 }
98 argc -= optind;
99 argv += optind;
100
101 if (argc < 2)
102 usage();
103
104 /*
105 * If the stat on the target fails or the target isn't a directory,
106 * try the move. More than 2 arguments is an error in this case.
107 */
108 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
109 if (argc > 2)
110 usage();
111 exit(do_move(argv[0], argv[1]));
112 }
113
114 /* It's a directory, move each file into it. */
115 (void)strcpy(path, argv[argc - 1]);
116 baselen = strlen(path);
117 endp = &path[baselen];
118 *endp++ = '/';
119 ++baselen;
118 if (!baselen || *(endp - 1) != '/') {
119 *endp++ = '/';
120 ++baselen;
121 }
120 for (rval = 0; --argc; ++argv) {
121 /*
122 * Find the last component of the source pathname. It
123 * may have trailing slashes.
124 */
125 p = *argv + strlen(*argv);
126 while (p != *argv && p[-1] == '/')
127 --p;
128 while (p != *argv && p[-1] != '/')
129 --p;
130
131 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) {
132 warnx("%s: destination pathname too long", *argv);
133 rval = 1;
134 } else {
135 memmove(endp, p, len + 1);
136 if (do_move(*argv, path))
137 rval = 1;
138 }
139 }
140 exit(rval);
141}
142
143int
144do_move(from, to)
145 char *from, *to;
146{
147 struct stat sb;
148 int ask, ch, first;
149 char modep[15];
150
151 /*
152 * Check access. If interactive and file exists, ask user if it
153 * should be replaced. Otherwise if file exists but isn't writable
154 * make sure the user wants to clobber it.
155 */
156 if (!fflg && !access(to, F_OK)) {
157
158 /* prompt only if source exist */
159 if (lstat(from, &sb) == -1) {
160 warn("%s", from);
161 return (1);
162 }
163
164#define YESNO "(y/n [n]) "
165 ask = 0;
166 if (iflg) {
167 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
168 ask = 1;
169 } else if (access(to, W_OK) && !stat(to, &sb)) {
170 strmode(sb.st_mode, modep);
171 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
172 modep + 1, modep[9] == ' ' ? "" : " ",
173 user_from_uid(sb.st_uid, 0),
174 group_from_gid(sb.st_gid, 0), to, YESNO);
175 ask = 1;
176 }
177 if (ask) {
178 first = ch = getchar();
179 while (ch != '\n' && ch != EOF)
180 ch = getchar();
181 if (first != 'y' && first != 'Y') {
182 (void)fprintf(stderr, "not overwritten\n");
183 return (0);
184 }
185 }
186 }
187 if (!rename(from, to))
188 return (0);
189
190 if (errno == EXDEV) {
191 struct statfs sfs;
192 char path[MAXPATHLEN];
193
194 /* Can't mv(1) a mount point. */
195 if (realpath(from, path) == NULL) {
196 warnx("cannot resolve %s: %s", from, path);
197 return (1);
198 }
199 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) {
200 warnx("cannot rename a mount point");
201 return (1);
202 }
203 } else {
204 warn("rename %s to %s", from, to);
205 return (1);
206 }
207
208 /*
209 * If rename fails because we're trying to cross devices, and
210 * it's a regular file, do the copy internally; otherwise, use
211 * cp and rm.
212 */
213 if (stat(from, &sb)) {
214 warn("%s", from);
215 return (1);
216 }
217 return (S_ISREG(sb.st_mode) ?
218 fastcopy(from, to, &sb) : copy(from, to));
219}
220
221int
222fastcopy(from, to, sbp)
223 char *from, *to;
224 struct stat *sbp;
225{
226 struct timeval tval[2];
227 static u_int blen;
228 static char *bp;
229 mode_t oldmode;
230 register int nread, from_fd, to_fd;
231
232 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
233 warn("%s", from);
234 return (1);
235 }
236 if (blen < sbp->st_blksize) {
237 if (bp != NULL)
238 free(bp);
239 if ((bp = malloc(sbp->st_blksize)) == NULL) {
240 blen = 0;
241 warnx("malloc failed");
242 return (1);
243 }
244 blen = sbp->st_blksize;
245 }
246 while ((to_fd =
247 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
248 if (errno == EEXIST && unlink(to) == 0)
249 continue;
250 warn("%s", to);
251 (void)close(from_fd);
252 return (1);
253 }
254 while ((nread = read(from_fd, bp, blen)) > 0)
255 if (write(to_fd, bp, nread) != nread) {
256 warn("%s", to);
257 goto err;
258 }
259 if (nread < 0) {
260 warn("%s", from);
261err: if (unlink(to))
262 warn("%s: remove", to);
263 (void)close(from_fd);
264 (void)close(to_fd);
265 return (1);
266 }
267 (void)close(from_fd);
268
269 oldmode = sbp->st_mode & ALLPERMS;
270 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
271 warn("%s: set owner/group (was: %u/%u)", to, sbp->st_uid,
272 sbp->st_gid);
273 if (oldmode & (S_ISUID | S_ISGID)) {
274 warnx(
275"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
276 to, oldmode);
277 sbp->st_mode &= ~(S_ISUID | S_ISGID);
278 }
279 }
280 if (fchmod(to_fd, sbp->st_mode))
281 warn("%s: set mode (was: 0%03o)", to, oldmode);
282
283 tval[0].tv_sec = sbp->st_atime;
284 tval[1].tv_sec = sbp->st_mtime;
285 tval[0].tv_usec = tval[1].tv_usec = 0;
286 if (utimes(to, tval))
287 warn("%s: set times", to);
288
289 if (close(to_fd)) {
290 warn("%s", to);
291 return (1);
292 }
293
294 if (unlink(from)) {
295 warn("%s: remove", from);
296 return (1);
297 }
298 return (0);
299}
300
301int
302copy(from, to)
303 char *from, *to;
304{
305 int pid, status;
306
307 if ((pid = vfork()) == 0) {
308 execl(_PATH_CP, "mv", "-PRp", from, to, NULL);
309 warn("%s", _PATH_CP);
310 _exit(1);
311 }
312 if (waitpid(pid, &status, 0) == -1) {
313 warn("%s: waitpid", _PATH_CP);
314 return (1);
315 }
316 if (!WIFEXITED(status)) {
317 warn("%s: did not terminate normally", _PATH_CP);
318 return (1);
319 }
320 if (WEXITSTATUS(status)) {
321 warn("%s: terminated with %d (non-zero) status",
322 _PATH_CP, WEXITSTATUS(status));
323 return (1);
324 }
325 if (!(pid = vfork())) {
326 execl(_PATH_RM, "mv", "-rf", from, NULL);
327 warn("%s", _PATH_RM);
328 _exit(1);
329 }
330 if (waitpid(pid, &status, 0) == -1) {
331 warn("%s: waitpid", _PATH_RM);
332 return (1);
333 }
334 if (!WIFEXITED(status)) {
335 warn("%s: did not terminate normally", _PATH_RM);
336 return (1);
337 }
338 if (WEXITSTATUS(status)) {
339 warn("%s: terminated with %d (non-zero) status",
340 _PATH_RM, WEXITSTATUS(status));
341 return (1);
342 }
343 return (0);
344}
345
346void
347usage()
348{
349 (void)fprintf(stderr, "%s\n%s\n",
350 "usage: mv [-f | -i] source target",
351 " mv [-f | -i] source ... directory");
352 exit(1);
353}
122 for (rval = 0; --argc; ++argv) {
123 /*
124 * Find the last component of the source pathname. It
125 * may have trailing slashes.
126 */
127 p = *argv + strlen(*argv);
128 while (p != *argv && p[-1] == '/')
129 --p;
130 while (p != *argv && p[-1] != '/')
131 --p;
132
133 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) {
134 warnx("%s: destination pathname too long", *argv);
135 rval = 1;
136 } else {
137 memmove(endp, p, len + 1);
138 if (do_move(*argv, path))
139 rval = 1;
140 }
141 }
142 exit(rval);
143}
144
145int
146do_move(from, to)
147 char *from, *to;
148{
149 struct stat sb;
150 int ask, ch, first;
151 char modep[15];
152
153 /*
154 * Check access. If interactive and file exists, ask user if it
155 * should be replaced. Otherwise if file exists but isn't writable
156 * make sure the user wants to clobber it.
157 */
158 if (!fflg && !access(to, F_OK)) {
159
160 /* prompt only if source exist */
161 if (lstat(from, &sb) == -1) {
162 warn("%s", from);
163 return (1);
164 }
165
166#define YESNO "(y/n [n]) "
167 ask = 0;
168 if (iflg) {
169 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
170 ask = 1;
171 } else if (access(to, W_OK) && !stat(to, &sb)) {
172 strmode(sb.st_mode, modep);
173 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
174 modep + 1, modep[9] == ' ' ? "" : " ",
175 user_from_uid(sb.st_uid, 0),
176 group_from_gid(sb.st_gid, 0), to, YESNO);
177 ask = 1;
178 }
179 if (ask) {
180 first = ch = getchar();
181 while (ch != '\n' && ch != EOF)
182 ch = getchar();
183 if (first != 'y' && first != 'Y') {
184 (void)fprintf(stderr, "not overwritten\n");
185 return (0);
186 }
187 }
188 }
189 if (!rename(from, to))
190 return (0);
191
192 if (errno == EXDEV) {
193 struct statfs sfs;
194 char path[MAXPATHLEN];
195
196 /* Can't mv(1) a mount point. */
197 if (realpath(from, path) == NULL) {
198 warnx("cannot resolve %s: %s", from, path);
199 return (1);
200 }
201 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) {
202 warnx("cannot rename a mount point");
203 return (1);
204 }
205 } else {
206 warn("rename %s to %s", from, to);
207 return (1);
208 }
209
210 /*
211 * If rename fails because we're trying to cross devices, and
212 * it's a regular file, do the copy internally; otherwise, use
213 * cp and rm.
214 */
215 if (stat(from, &sb)) {
216 warn("%s", from);
217 return (1);
218 }
219 return (S_ISREG(sb.st_mode) ?
220 fastcopy(from, to, &sb) : copy(from, to));
221}
222
223int
224fastcopy(from, to, sbp)
225 char *from, *to;
226 struct stat *sbp;
227{
228 struct timeval tval[2];
229 static u_int blen;
230 static char *bp;
231 mode_t oldmode;
232 register int nread, from_fd, to_fd;
233
234 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
235 warn("%s", from);
236 return (1);
237 }
238 if (blen < sbp->st_blksize) {
239 if (bp != NULL)
240 free(bp);
241 if ((bp = malloc(sbp->st_blksize)) == NULL) {
242 blen = 0;
243 warnx("malloc failed");
244 return (1);
245 }
246 blen = sbp->st_blksize;
247 }
248 while ((to_fd =
249 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
250 if (errno == EEXIST && unlink(to) == 0)
251 continue;
252 warn("%s", to);
253 (void)close(from_fd);
254 return (1);
255 }
256 while ((nread = read(from_fd, bp, blen)) > 0)
257 if (write(to_fd, bp, nread) != nread) {
258 warn("%s", to);
259 goto err;
260 }
261 if (nread < 0) {
262 warn("%s", from);
263err: if (unlink(to))
264 warn("%s: remove", to);
265 (void)close(from_fd);
266 (void)close(to_fd);
267 return (1);
268 }
269 (void)close(from_fd);
270
271 oldmode = sbp->st_mode & ALLPERMS;
272 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
273 warn("%s: set owner/group (was: %u/%u)", to, sbp->st_uid,
274 sbp->st_gid);
275 if (oldmode & (S_ISUID | S_ISGID)) {
276 warnx(
277"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
278 to, oldmode);
279 sbp->st_mode &= ~(S_ISUID | S_ISGID);
280 }
281 }
282 if (fchmod(to_fd, sbp->st_mode))
283 warn("%s: set mode (was: 0%03o)", to, oldmode);
284
285 tval[0].tv_sec = sbp->st_atime;
286 tval[1].tv_sec = sbp->st_mtime;
287 tval[0].tv_usec = tval[1].tv_usec = 0;
288 if (utimes(to, tval))
289 warn("%s: set times", to);
290
291 if (close(to_fd)) {
292 warn("%s", to);
293 return (1);
294 }
295
296 if (unlink(from)) {
297 warn("%s: remove", from);
298 return (1);
299 }
300 return (0);
301}
302
303int
304copy(from, to)
305 char *from, *to;
306{
307 int pid, status;
308
309 if ((pid = vfork()) == 0) {
310 execl(_PATH_CP, "mv", "-PRp", from, to, NULL);
311 warn("%s", _PATH_CP);
312 _exit(1);
313 }
314 if (waitpid(pid, &status, 0) == -1) {
315 warn("%s: waitpid", _PATH_CP);
316 return (1);
317 }
318 if (!WIFEXITED(status)) {
319 warn("%s: did not terminate normally", _PATH_CP);
320 return (1);
321 }
322 if (WEXITSTATUS(status)) {
323 warn("%s: terminated with %d (non-zero) status",
324 _PATH_CP, WEXITSTATUS(status));
325 return (1);
326 }
327 if (!(pid = vfork())) {
328 execl(_PATH_RM, "mv", "-rf", from, NULL);
329 warn("%s", _PATH_RM);
330 _exit(1);
331 }
332 if (waitpid(pid, &status, 0) == -1) {
333 warn("%s: waitpid", _PATH_RM);
334 return (1);
335 }
336 if (!WIFEXITED(status)) {
337 warn("%s: did not terminate normally", _PATH_RM);
338 return (1);
339 }
340 if (WEXITSTATUS(status)) {
341 warn("%s: terminated with %d (non-zero) status",
342 _PATH_RM, WEXITSTATUS(status));
343 return (1);
344 }
345 return (0);
346}
347
348void
349usage()
350{
351 (void)fprintf(stderr, "%s\n%s\n",
352 "usage: mv [-f | -i] source target",
353 " mv [-f | -i] source ... directory");
354 exit(1);
355}