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[] =
|
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66#include <sysexits.h>
67#include <unistd.h>
68
69#include "pathnames.h"
70
71int fflg, iflg, vflg;
72
73int copy(char *, char *);
74int do_move(char *, char *);
75int fastcopy(char *, char *, struct stat *);
76void usage(void);
77
78int
79main(int argc, char *argv[])
80{
81 int baselen, len, rval;
82 char *p, *endp;
83 struct stat sb;
84 int ch;
85 char path[PATH_MAX];
86
87 while ((ch = getopt(argc, argv, "fiv")) != -1)
88 switch (ch) {
89 case 'i':
90 iflg = 1;
91 fflg = 0;
92 break;
93 case 'f':
94 fflg = 1;
95 iflg = 0;
96 break;
97 case 'v':
98 vflg = 1;
99 break;
100 default:
101 usage();
102 }
103 argc -= optind;
104 argv += optind;
105
106 if (argc < 2)
107 usage();
108
109 /*
110 * If the stat on the target fails or the target isn't a directory,
111 * try the move. More than 2 arguments is an error in this case.
112 */
113 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
114 if (argc > 2)
115 usage();
116 exit(do_move(argv[0], argv[1]));
117 }
118
119 /* It's a directory, move each file into it. */
120 if (strlen(argv[argc - 1]) > sizeof(path) - 1)
121 errx(1, "%s: destination pathname too long", *argv);
122 (void)strcpy(path, argv[argc - 1]);
123 baselen = strlen(path);
124 endp = &path[baselen];
125 if (!baselen || *(endp - 1) != '/') {
126 *endp++ = '/';
127 ++baselen;
128 }
129 for (rval = 0; --argc; ++argv) {
130 /*
131 * Find the last component of the source pathname. It
132 * may have trailing slashes.
133 */
134 p = *argv + strlen(*argv);
135 while (p != *argv && p[-1] == '/')
136 --p;
137 while (p != *argv && p[-1] != '/')
138 --p;
139
140 if ((baselen + (len = strlen(p))) >= PATH_MAX) {
141 warnx("%s: destination pathname too long", *argv);
142 rval = 1;
143 } else {
144 memmove(endp, p, (size_t)len + 1);
145 if (do_move(*argv, path))
146 rval = 1;
147 }
148 }
149 exit(rval);
150}
151
152int
153do_move(char *from, char *to)
154{
155 struct stat sb;
156 int ask, ch, first;
157 char modep[15];
158
159 /*
160 * Check access. If interactive and file exists, ask user if it
161 * should be replaced. Otherwise if file exists but isn't writable
162 * make sure the user wants to clobber it.
163 */
164 if (!fflg && !access(to, F_OK)) {
165
166 /* prompt only if source exist */
167 if (lstat(from, &sb) == -1) {
168 warn("%s", from);
169 return (1);
170 }
171
172#define YESNO "(y/n [n]) "
173 ask = 0;
174 if (iflg) {
175 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
176 ask = 1;
177 } else if (access(to, W_OK) && !stat(to, &sb)) {
178 strmode(sb.st_mode, modep);
179 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
180 modep + 1, modep[9] == ' ' ? "" : " ",
181 user_from_uid((unsigned long)sb.st_uid, 0),
182 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO);
183 ask = 1;
184 }
185 if (ask) {
186 first = ch = getchar();
187 while (ch != '\n' && ch != EOF)
188 ch = getchar();
189 if (first != 'y' && first != 'Y') {
190 (void)fprintf(stderr, "not overwritten\n");
191 return (0);
192 }
193 }
194 }
195 if (!rename(from, to)) {
196 if (vflg)
197 printf("%s -> %s\n", from, to);
198 return (0);
199 }
200
201 if (errno == EXDEV) {
202 struct statfs sfs;
203 char path[PATH_MAX];
204
205 /* Can't mv(1) a mount point. */
206 if (realpath(from, path) == NULL) {
207 warnx("cannot resolve %s: %s", from, path);
208 return (1);
209 }
210 if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) {
211 warnx("cannot rename a mount point");
212 return (1);
213 }
214 } else {
215 warn("rename %s to %s", from, to);
216 return (1);
217 }
218
219 /*
220 * If rename fails because we're trying to cross devices, and
221 * it's a regular file, do the copy internally; otherwise, use
222 * cp and rm.
223 */
224 if (lstat(from, &sb)) {
225 warn("%s", from);
226 return (1);
227 }
228 return (S_ISREG(sb.st_mode) ?
229 fastcopy(from, to, &sb) : copy(from, to));
230}
231
232int
233fastcopy(char *from, char *to, struct stat *sbp)
234{
235 struct timeval tval[2];
236 static u_int blen;
237 static char *bp;
238 mode_t oldmode;
239 int nread, from_fd, to_fd;
240
241 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
242 warn("%s", from);
243 return (1);
244 }
245 if (blen < sbp->st_blksize) {
246 if (bp != NULL)
247 free(bp);
248 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) {
249 blen = 0;
250 warnx("malloc failed");
251 return (1);
252 }
253 blen = sbp->st_blksize;
254 }
255 while ((to_fd =
256 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
257 if (errno == EEXIST && unlink(to) == 0)
258 continue;
259 warn("%s", to);
260 (void)close(from_fd);
261 return (1);
262 }
263 while ((nread = read(from_fd, bp, (size_t)blen)) > 0)
264 if (write(to_fd, bp, (size_t)nread) != nread) {
265 warn("%s", to);
266 goto err;
267 }
268 if (nread < 0) {
269 warn("%s", from);
270err: if (unlink(to))
271 warn("%s: remove", to);
272 (void)close(from_fd);
273 (void)close(to_fd);
274 return (1);
275 }
276 (void)close(from_fd);
277
278 oldmode = sbp->st_mode & ALLPERMS;
279 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
280 warn("%s: set owner/group (was: %lu/%lu)", to,
281 (u_long)sbp->st_uid, (u_long)sbp->st_gid);
282 if (oldmode & (S_ISUID | S_ISGID)) {
283 warnx(
284"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
285 to, oldmode);
286 sbp->st_mode &= ~(S_ISUID | S_ISGID);
287 }
288 }
289 if (fchmod(to_fd, sbp->st_mode))
290 warn("%s: set mode (was: 0%03o)", to, oldmode);
291 /*
292 * XXX
293 * NFS doesn't support chflags; ignore errors unless there's reason
294 * to believe we're losing bits. (Note, this still won't be right
295 * if the server supports flags and we were trying to *remove* flags
296 * on a file that we copied, i.e., that we didn't create.)
297 */
298 errno = 0;
299 if (fchflags(to_fd, (u_long)sbp->st_flags))
300 if (errno != EOPNOTSUPP || sbp->st_flags != 0)
301 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
302
303 tval[0].tv_sec = sbp->st_atime;
304 tval[1].tv_sec = sbp->st_mtime;
305 tval[0].tv_usec = tval[1].tv_usec = 0;
306 if (utimes(to, tval))
307 warn("%s: set times", to);
308
309 if (close(to_fd)) {
310 warn("%s", to);
311 return (1);
312 }
313
314 if (unlink(from)) {
315 warn("%s: remove", from);
316 return (1);
317 }
318 if (vflg)
319 printf("%s -> %s\n", from, to);
320 return (0);
321}
322
323int
324copy(char *from, char *to)
325{
326 int pid, status;
327
328 if ((pid = fork()) == 0) {
329 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", from, to,
330 (char *)NULL);
331 warn("%s", _PATH_CP);
332 _exit(1);
333 }
334 if (waitpid(pid, &status, 0) == -1) {
335 warn("%s: waitpid", _PATH_CP);
336 return (1);
337 }
338 if (!WIFEXITED(status)) {
339 warn("%s: did not terminate normally", _PATH_CP);
340 return (1);
341 }
342 if (WEXITSTATUS(status)) {
343 warn("%s: terminated with %d (non-zero) status",
344 _PATH_CP, WEXITSTATUS(status));
345 return (1);
346 }
347 if (!(pid = vfork())) {
348 execl(_PATH_RM, "mv", "-rf", from, (char *)NULL);
349 warn("%s", _PATH_RM);
350 _exit(1);
351 }
352 if (waitpid(pid, &status, 0) == -1) {
353 warn("%s: waitpid", _PATH_RM);
354 return (1);
355 }
356 if (!WIFEXITED(status)) {
357 warn("%s: did not terminate normally", _PATH_RM);
358 return (1);
359 }
360 if (WEXITSTATUS(status)) {
361 warn("%s: terminated with %d (non-zero) status",
362 _PATH_RM, WEXITSTATUS(status));
363 return (1);
364 }
365 return (0);
366}
367
368void
369usage(void)
370{
371
372 (void)fprintf(stderr, "%s\n%s\n",
373 "usage: mv [-f | -i] [-v] source target",
374 " mv [-f | -i] [-v] source ... directory");
375 exit(EX_USAGE);
376}
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