1 /* $NetBSD: mv.c,v 1.46 2020/06/24 16:58:12 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ken Smith of The State University of New York at Buffalo.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
38 The Regents of the University of California. All rights reserved.");
39 #endif /* not lint */
40
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
44 #else
45 __RCSID("$NetBSD: mv.c,v 1.46 2020/06/24 16:58:12 riastradh Exp $");
46 #endif
47 #endif /* not lint */
48
49 #include <sys/param.h>
50 #include <sys/time.h>
51 #include <sys/wait.h>
52 #include <sys/stat.h>
53 #include <sys/extattr.h>
54
55 #include <err.h>
56 #include <errno.h>
57 #include <fcntl.h>
58 #include <grp.h>
59 #include <locale.h>
60 #include <pwd.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <unistd.h>
65
66 #include "pathnames.h"
67
68 static int fflg, hflg, iflg, vflg;
69 static int stdin_ok;
70 static sig_atomic_t pinfo;
71
72 static int copy(char *, char *);
73 static int do_move(char *, char *);
74 static int fastcopy(char *, char *, struct stat *);
75 __dead static void usage(void);
76
77 static void
progress(int sig __unused)78 progress(int sig __unused)
79 {
80
81 pinfo++;
82 }
83
84 int
main(int argc,char * argv[])85 main(int argc, char *argv[])
86 {
87 int ch, len, rval;
88 char *p, *endp;
89 struct stat sb;
90 char path[MAXPATHLEN + 1];
91 size_t baselen;
92
93 setprogname(argv[0]);
94 (void)setlocale(LC_ALL, "");
95
96 while ((ch = getopt(argc, argv, "hifv")) != -1)
97 switch (ch) {
98 case 'h':
99 hflg = 1;
100 break;
101 case 'i':
102 fflg = 0;
103 iflg = 1;
104 break;
105 case 'f':
106 iflg = 0;
107 fflg = 1;
108 break;
109 case 'v':
110 vflg = 1;
111 break;
112 default:
113 usage();
114 }
115 argc -= optind;
116 argv += optind;
117
118 if (argc < 2)
119 usage();
120
121 stdin_ok = isatty(STDIN_FILENO);
122
123 (void)signal(SIGINFO, progress);
124
125 /*
126 * If the stat on the target fails or the target isn't a directory,
127 * try the move. More than 2 arguments is an error in this case.
128 */
129 if (hflg || stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
130 if (argc > 2)
131 usage();
132 exit(do_move(argv[0], argv[1]));
133 }
134
135 /* It's a directory, move each file into it. */
136 baselen = strlcpy(path, argv[argc - 1], sizeof(path));
137 if (baselen >= sizeof(path))
138 errx(1, "%s: destination pathname too long", argv[argc - 1]);
139 endp = &path[baselen];
140 if (!baselen || *(endp - 1) != '/') {
141 *endp++ = '/';
142 ++baselen;
143 }
144 for (rval = 0; --argc; ++argv) {
145 p = *argv + strlen(*argv) - 1;
146 while (*p == '/' && p != *argv)
147 *p-- = '\0';
148 if ((p = strrchr(*argv, '/')) == NULL)
149 p = *argv;
150 else
151 ++p;
152
153 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) {
154 warnx("%s: destination pathname too long", *argv);
155 rval = 1;
156 } else {
157 memmove(endp, p, len + 1);
158 if (do_move(*argv, path))
159 rval = 1;
160 }
161 }
162 exit(rval);
163 /* NOTREACHED */
164 }
165
166 static int
do_move(char * from,char * to)167 do_move(char *from, char *to)
168 {
169 struct stat sb;
170 char modep[15];
171
172 /*
173 * (1) If the destination path exists, the -f option is not specified
174 * and either of the following conditions are true:
175 *
176 * (a) The permissions of the destination path do not permit
177 * writing and the standard input is a terminal.
178 * (b) The -i option is specified.
179 *
180 * the mv utility shall write a prompt to standard error and
181 * read a line from standard input. If the response is not
182 * affirmative, mv shall do nothing more with the current
183 * source file...
184 */
185 if (!fflg && !access(to, F_OK)) {
186 int ask = 1;
187 int ch;
188
189 if (iflg) {
190 if (access(from, F_OK)) {
191 warn("rename %s", from);
192 return (1);
193 }
194 (void)fprintf(stderr, "overwrite %s? ", to);
195 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) {
196 if (access(from, F_OK)) {
197 warn("rename %s", from);
198 return (1);
199 }
200 strmode(sb.st_mode, modep);
201 (void)fprintf(stderr, "override %s%s%s/%s for %s? ",
202 modep + 1, modep[9] == ' ' ? "" : " ",
203 user_from_uid(sb.st_uid, 0),
204 group_from_gid(sb.st_gid, 0), to);
205 } else
206 ask = 0;
207 if (ask) {
208 if ((ch = getchar()) != EOF && ch != '\n') {
209 int ch2;
210 while ((ch2 = getchar()) != EOF && ch2 != '\n')
211 continue;
212 }
213 if (ch != 'y' && ch != 'Y')
214 return (0);
215 }
216 }
217
218 /*
219 * (2) If rename() succeeds, mv shall do nothing more with the
220 * current source file. If it fails for any other reason than
221 * EXDEV, mv shall write a diagnostic message to the standard
222 * error and do nothing more with the current source file.
223 *
224 * (3) If the destination path exists, and it is a file of type
225 * directory and source_file is not a file of type directory,
226 * or it is a file not of type directory, and source file is
227 * a file of type directory, mv shall write a diagnostic
228 * message to standard error, and do nothing more with the
229 * current source file...
230 */
231 if (!rename(from, to)) {
232 if (vflg)
233 printf("%s -> %s\n", from, to);
234 return (0);
235 }
236
237 if (errno != EXDEV) {
238 warn("rename %s to %s", from, to);
239 return (1);
240 }
241
242 /*
243 * (4) If the destination path exists, mv shall attempt to remove it.
244 * If this fails for any reason, mv shall write a diagnostic
245 * message to the standard error and do nothing more with the
246 * current source file...
247 */
248 if (!lstat(to, &sb)) {
249 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) {
250 warn("can't remove %s", to);
251 return (1);
252 }
253 }
254
255 /*
256 * (5) The file hierarchy rooted in source_file shall be duplicated
257 * as a file hierarchy rooted in the destination path...
258 */
259 if (lstat(from, &sb)) {
260 warn("%s", from);
261 return (1);
262 }
263
264 return (S_ISREG(sb.st_mode) ?
265 fastcopy(from, to, &sb) : copy(from, to));
266 }
267
268 static int
fastcopy(char * from,char * to,struct stat * sbp)269 fastcopy(char *from, char *to, struct stat *sbp)
270 {
271 #if defined(__NetBSD__)
272 struct timespec ts[2];
273 #else
274 struct timeval tval[2];
275 #endif
276 static blksize_t blen;
277 static char *bp;
278 int from_fd, to_fd;
279 ssize_t nread;
280 off_t total = 0;
281
282 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
283 warn("%s", from);
284 return (1);
285 }
286 if ((to_fd =
287 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) {
288 warn("%s", to);
289 (void)close(from_fd);
290 return (1);
291 }
292 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
293 warn(NULL);
294 blen = 0;
295 (void)close(from_fd);
296 (void)close(to_fd);
297 return (1);
298 }
299 while ((nread = read(from_fd, bp, blen)) > 0) {
300 if (write(to_fd, bp, nread) != nread) {
301 warn("%s", to);
302 goto err;
303 }
304 total += nread;
305 if (pinfo) {
306 int pcent = (int)((100.0 * total) / sbp->st_size);
307
308 pinfo = 0;
309 (void)fprintf(stderr, "%s => %s %llu/%llu bytes %d%% "
310 "written\n", from, to, (unsigned long long)total,
311 (unsigned long long)sbp->st_size, pcent);
312 }
313 }
314 if (nread < 0) {
315 warn("%s", from);
316 err: if (unlink(to))
317 warn("%s: remove", to);
318 (void)close(from_fd);
319 (void)close(to_fd);
320 return (1);
321 }
322
323 if (fcpxattr(from_fd, to_fd) == -1)
324 warn("%s: error copying extended attributes", to);
325
326 (void)close(from_fd);
327 #ifdef BSD4_4
328 #if defined(__NetBSD__)
329 ts[0] = sbp->st_atimespec;
330 ts[1] = sbp->st_mtimespec;
331 #else
332 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec);
333 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec);
334 #endif
335 #else
336 tval[0].tv_sec = sbp->st_atime;
337 tval[1].tv_sec = sbp->st_mtime;
338 tval[0].tv_usec = 0;
339 tval[1].tv_usec = 0;
340 #endif
341 #ifdef __SVR4
342 if (utimes(to, tval))
343 #else
344 #if defined(__NetBSD__)
345 if (futimens(to_fd, ts))
346 #else
347 if (futimes(to_fd, tval))
348 #endif
349 #endif
350 warn("%s: set times", to);
351 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
352 if (errno != EPERM)
353 warn("%s: set owner/group", to);
354 sbp->st_mode &= ~(S_ISUID | S_ISGID);
355 }
356 if (fchmod(to_fd, sbp->st_mode))
357 warn("%s: set mode", to);
358 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP))
359 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
360
361 if (close(to_fd)) {
362 warn("%s", to);
363 return (1);
364 }
365
366 if (unlink(from)) {
367 warn("%s: remove", from);
368 return (1);
369 }
370
371 if (vflg)
372 printf("%s -> %s\n", from, to);
373
374 return (0);
375 }
376
377 static int
copy(char * from,char * to)378 copy(char *from, char *to)
379 {
380 pid_t pid;
381 int status;
382
383 if ((pid = vfork()) == 0) {
384 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, NULL);
385 warn("%s", _PATH_CP);
386 _exit(1);
387 }
388 if (waitpid(pid, &status, 0) == -1) {
389 warn("%s: waitpid", _PATH_CP);
390 return (1);
391 }
392 if (!WIFEXITED(status)) {
393 warnx("%s: did not terminate normally", _PATH_CP);
394 return (1);
395 }
396 if (WEXITSTATUS(status)) {
397 warnx("%s: terminated with %d (non-zero) status",
398 _PATH_CP, WEXITSTATUS(status));
399 return (1);
400 }
401 if (!(pid = vfork())) {
402 execl(_PATH_RM, "mv", "-rf", "--", from, NULL);
403 warn("%s", _PATH_RM);
404 _exit(1);
405 }
406 if (waitpid(pid, &status, 0) == -1) {
407 warn("%s: waitpid", _PATH_RM);
408 return (1);
409 }
410 if (!WIFEXITED(status)) {
411 warnx("%s: did not terminate normally", _PATH_RM);
412 return (1);
413 }
414 if (WEXITSTATUS(status)) {
415 warnx("%s: terminated with %d (non-zero) status",
416 _PATH_RM, WEXITSTATUS(status));
417 return (1);
418 }
419 return (0);
420 }
421
422 static void
usage(void)423 usage(void)
424 {
425 (void)fprintf(stderr, "usage: %s [-fhiv] source target\n"
426 " %s [-fiv] source ... directory\n", getprogname(),
427 getprogname());
428 exit(1);
429 /* NOTREACHED */
430 }
431