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source: kBuild/trunk/src/kmk/kmkbuiltin/mv.c@ 1626

Last change on this file since 1626 was 1604, checked in by bird, 17 years ago

DragonFly BSD config. Kudos to Francis G.
  • Property svn:eol-style set to native
File size: 12.1 KB
Line 
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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if 0
34#ifndef lint
35static char const copyright[] =
36"@(#) Copyright (c) 1989, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
42#endif /* not lint */
43#endif
44#if 0
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: src/bin/mv/mv.c,v 1.46 2005/09/05 04:36:08 csjp Exp $");
47#endif
48
49#include <sys/types.h>
50#ifndef _MSC_VER
51# ifndef __OS2__
52# include <sys/acl.h>
53# endif
54# include <sys/param.h>
55# include <sys/time.h>
56# include <sys/wait.h>
57# include <sys/mount.h>
58#endif
59#include <sys/stat.h>
60
61#include "err.h"
62#include <errno.h>
63#include <fcntl.h>
64#include <grp.h>
65#include <limits.h>
66#include <paths.h>
67#include <pwd.h>
68#include <stdio.h>
69#include <stdlib.h>
70#include <string.h>
71#include <sysexits.h>
72#include <unistd.h>
73#include "getopt.h"
74#ifdef __sun__
75# include "solfakes.h"
76#endif
77#ifdef _MSC_VER
78# include "mscfakes.h"
79#endif
80#include "kmkbuiltin.h"
81
82
83static int fflg, iflg, nflg, vflg;
84static struct option long_options[] =
85{
86 { "help", no_argument, 0, 261 },
87 { "version", no_argument, 0, 262 },
88 { 0, 0, 0, 0 },
89};
90
91
92static int do_move(char *, char *);
93#ifdef CROSS_DEVICE_MOVE
94static int fastcopy(char *, char *, struct stat *);
95static int copy(char *, char *);
96#endif
97static int usage(FILE *);
98
99#if !defined(__FreeBSD__) && !defined(__APPLE__)
100extern void strmode(mode_t mode, char *p);
101#endif
102
103#if !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__DragonFly__)
104# ifdef __OS2__
105static
106# endif
107const char *user_from_uid(uid_t id, int x)
108{
109 static char s_buf[64];
110 sprintf(s_buf, "%ld", id);
111 return s_buf;
112}
113# ifdef __OS2__
114static
115# endif
116const char *group_from_gid(gid_t id, int x)
117{
118 static char s_buf[64];
119 sprintf(s_buf, "%ld", id);
120 return s_buf;
121}
122#endif /* 'not in libc' */
123
124
125int
126kmk_builtin_mv(int argc, char *argv[], char **envp)
127{
128 size_t baselen, len;
129 int rval;
130 char *p, *endp;
131 struct stat sb;
132 int ch;
133 char path[PATH_MAX];
134
135 /* kmk: reinitialize globals */
136 fflg = iflg = nflg = vflg = 0;
137
138 /* kmk: reset getopt and set progname */
139 g_progname = argv[0];
140 opterr = 1;
141 optarg = NULL;
142 optopt = 0;
143 optind = 0; /* init */
144
145 while ((ch = getopt_long(argc, argv, "finv", long_options, NULL)) != -1)
146 switch (ch) {
147 case 'i':
148 iflg = 1;
149 fflg = nflg = 0;
150 break;
151 case 'f':
152 fflg = 1;
153 iflg = nflg = 0;
154 break;
155 case 'n':
156 nflg = 1;
157 fflg = iflg = 0;
158 break;
159 case 'v':
160 vflg = 1;
161 break;
162 case 261:
163 usage(stdout);
164 return 0;
165 case 262:
166 return kbuild_version(argv[0]);
167 default:
168 return usage(stderr);
169 }
170 argc -= optind;
171 argv += optind;
172
173 if (argc < 2)
174 return usage(stderr);
175
176 /*
177 * If the stat on the target fails or the target isn't a directory,
178 * try the move. More than 2 arguments is an error in this case.
179 */
180 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
181 if (argc > 2)
182 return usage(stderr);
183 return do_move(argv[0], argv[1]);
184 }
185
186 /* It's a directory, move each file into it. */
187 if (strlen(argv[argc - 1]) > sizeof(path) - 1)
188 return errx(1, "%s: destination pathname too long", *argv);
189 (void)strcpy(path, argv[argc - 1]);
190 baselen = strlen(path);
191 endp = &path[baselen];
192#if defined(_MSC_VER) || defined(__EMX__)
193 if (!baselen || (*(endp - 1) != '/' && *(endp - 1) != '\\' && *(endp - 1) != ':')) {
194#else
195 if (!baselen || *(endp - 1) != '/') {
196#endif
197 *endp++ = '/';
198 ++baselen;
199 }
200 for (rval = 0; --argc; ++argv) {
201 /*
202 * Find the last component of the source pathname. It
203 * may have trailing slashes.
204 */
205 p = *argv + strlen(*argv);
206#if defined(_MSC_VER) || defined(__EMX__)
207 while (p != *argv && (p[-1] == '/' || p[-1] == '\\'))
208 --p;
209 while (p != *argv && p[-1] != '/' && p[-1] != '/' && p[-1] != ':')
210 --p;
211#else
212 while (p != *argv && p[-1] == '/')
213 --p;
214 while (p != *argv && p[-1] != '/')
215 --p;
216#endif
217
218 if ((baselen + (len = strlen(p))) >= PATH_MAX) {
219 warnx("%s: destination pathname too long", *argv);
220 rval = 1;
221 } else {
222 memmove(endp, p, (size_t)len + 1);
223 if (do_move(*argv, path))
224 rval = 1;
225 }
226 }
227 return rval;
228}
229
230static int
231do_move(char *from, char *to)
232{
233 struct stat sb;
234 int ask, ch, first;
235 char modep[15];
236
237 /*
238 * Check access. If interactive and file exists, ask user if it
239 * should be replaced. Otherwise if file exists but isn't writable
240 * make sure the user wants to clobber it.
241 */
242 if (!fflg && !access(to, F_OK)) {
243
244 /* prompt only if source exist */
245 if (lstat(from, &sb) == -1) {
246 warn("%s", from);
247 return (1);
248 }
249
250#define YESNO "(y/n [n]) "
251 ask = 0;
252 if (nflg) {
253 if (vflg)
254 printf("%s not overwritten\n", to);
255 return (0);
256 } else if (iflg) {
257 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
258 ask = 1;
259 } else if (access(to, W_OK) && !stat(to, &sb)) {
260 strmode(sb.st_mode, modep);
261 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
262 modep + 1, modep[9] == ' ' ? "" : " ",
263 user_from_uid((unsigned long)sb.st_uid, 0),
264 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO);
265 ask = 1;
266 }
267 if (ask) {
268 first = ch = getchar();
269 while (ch != '\n' && ch != EOF)
270 ch = getchar();
271 if (first != 'y' && first != 'Y') {
272 (void)fprintf(stderr, "not overwritten\n");
273 return (0);
274 }
275 }
276 }
277 if (!rename(from, to)) {
278 if (vflg)
279 printf("%s -> %s\n", from, to);
280 return (0);
281 }
282#ifdef _MSC_VER
283 if (errno == EEXIST) {
284 remove(to);
285 if (!rename(from, to)) {
286 if (vflg)
287 printf("%s -> %s\n", from, to);
288 return (0);
289 }
290 }
291#endif
292
293 if (errno == EXDEV) {
294#ifndef CROSS_DEVICE_MOVE
295 warnx("cannot move `%s' to a different device: `%s'", from, to);
296 return (1);
297#else
298 struct statfs sfs;
299 char path[PATH_MAX];
300
301 /*
302 * If the source is a symbolic link and is on another
303 * filesystem, it can be recreated at the destination.
304 */
305 if (lstat(from, &sb) == -1) {
306 warn("%s", from);
307 return (1);
308 }
309 if (!S_ISLNK(sb.st_mode)) {
310 /* Can't mv(1) a mount point. */
311 if (realpath(from, path) == NULL) {
312 warnx("cannot resolve %s: %s", from, path);
313 return (1);
314 }
315 if (!statfs(path, &sfs) &&
316 !strcmp(path, sfs.f_mntonname)) {
317 warnx("cannot rename a mount point");
318 return (1);
319 }
320 }
321#endif
322 } else {
323 warn("rename %s to %s", from, to);
324 return (1);
325 }
326
327#ifdef CROSS_DEVICE_MOVE
328 /*
329 * If rename fails because we're trying to cross devices, and
330 * it's a regular file, do the copy internally; otherwise, use
331 * cp and rm.
332 */
333 if (lstat(from, &sb)) {
334 warn("%s", from);
335 return (1);
336 }
337 return (S_ISREG(sb.st_mode) ?
338 fastcopy(from, to, &sb) : copy(from, to));
339#endif
340}
341
342#ifdef CROSS_DEVICE_MOVE
343int
344static fastcopy(char *from, char *to, struct stat *sbp)
345{
346 struct timeval tval[2];
347 static u_int blen;
348 static char *bp;
349 mode_t oldmode;
350 int nread, from_fd, to_fd;
351 acl_t acl;
352
353 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
354 warn("%s", from);
355 return (1);
356 }
357 if (blen < sbp->st_blksize) {
358 if (bp != NULL)
359 free(bp);
360 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) {
361 blen = 0;
362 warnx("malloc failed");
363 return (1);
364 }
365 blen = sbp->st_blksize;
366 }
367 while ((to_fd =
368 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
369 if (errno == EEXIST && unlink(to) == 0)
370 continue;
371 warn("%s", to);
372 (void)close(from_fd);
373 return (1);
374 }
375 while ((nread = read(from_fd, bp, (size_t)blen)) > 0)
376 if (write(to_fd, bp, (size_t)nread) != nread) {
377 warn("%s", to);
378 goto err;
379 }
380 if (nread < 0) {
381 warn("%s", from);
382err: if (unlink(to))
383 warn("%s: remove", to);
384 (void)close(from_fd);
385 (void)close(to_fd);
386 return (1);
387 }
388
389 oldmode = sbp->st_mode & ALLPERMS;
390 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
391 warn("%s: set owner/group (was: %lu/%lu)", to,
392 (u_long)sbp->st_uid, (u_long)sbp->st_gid);
393 if (oldmode & (S_ISUID | S_ISGID)) {
394 warnx(
395"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
396 to, oldmode);
397 sbp->st_mode &= ~(S_ISUID | S_ISGID);
398 }
399 }
400 /*
401 * POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect
402 * for dest_file, then it's ACLs shall reflect the ACLs of the
403 * source_file.
404 */
405 if (fpathconf(to_fd, _PC_ACL_EXTENDED) == 1 &&
406 fpathconf(from_fd, _PC_ACL_EXTENDED) == 1) {
407 acl = acl_get_fd(from_fd);
408 if (acl == NULL)
409 warn("failed to get acl entries while setting %s",
410 from);
411 else if (acl_set_fd(to_fd, acl) < 0)
412 warn("failed to set acl entries for %s", to);
413 }
414 (void)close(from_fd);
415 if (fchmod(to_fd, sbp->st_mode))
416 warn("%s: set mode (was: 0%03o)", to, oldmode);
417 /*
418 * XXX
419 * NFS doesn't support chflags; ignore errors unless there's reason
420 * to believe we're losing bits. (Note, this still won't be right
421 * if the server supports flags and we were trying to *remove* flags
422 * on a file that we copied, i.e., that we didn't create.)
423 */
424 errno = 0;
425 if (fchflags(to_fd, (u_long)sbp->st_flags))
426 if (errno != EOPNOTSUPP || sbp->st_flags != 0)
427 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
428
429 tval[0].tv_sec = sbp->st_atime;
430 tval[1].tv_sec = sbp->st_mtime;
431 tval[0].tv_usec = tval[1].tv_usec = 0;
432 if (utimes(to, tval))
433 warn("%s: set times", to);
434
435 if (close(to_fd)) {
436 warn("%s", to);
437 return (1);
438 }
439
440 if (unlink(from)) {
441 warn("%s: remove", from);
442 return (1);
443 }
444 if (vflg)
445 printf("%s -> %s\n", from, to);
446 return (0);
447}
448
449int
450copy(char *from, char *to)
451{
452 int pid, status;
453
454 if ((pid = fork()) == 0) {
455 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to,
456 (char *)NULL);
457 warn("%s", _PATH_CP);
458 _exit(1);
459 }
460 if (waitpid(pid, &status, 0) == -1) {
461 warn("%s: waitpid", _PATH_CP);
462 return (1);
463 }
464 if (!WIFEXITED(status)) {
465 warnx("%s: did not terminate normally", _PATH_CP);
466 return (1);
467 }
468 if (WEXITSTATUS(status)) {
469 warnx("%s: terminated with %d (non-zero) status",
470 _PATH_CP, WEXITSTATUS(status));
471 return (1);
472 }
473 if (!(pid = vfork())) {
474 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL);
475 warn("%s", _PATH_RM);
476 _exit(1);
477 }
478 if (waitpid(pid, &status, 0) == -1) {
479 warn("%s: waitpid", _PATH_RM);
480 return (1);
481 }
482 if (!WIFEXITED(status)) {
483 warnx("%s: did not terminate normally", _PATH_RM);
484 return (1);
485 }
486 if (WEXITSTATUS(status)) {
487 warnx("%s: terminated with %d (non-zero) status",
488 _PATH_RM, WEXITSTATUS(status));
489 return (1);
490 }
491 return (0);
492}
493#endif /* CROSS_DEVICE_MOVE */
494
495
496static int
497usage(FILE *pf)
498{
499 fprintf(pf, "usage: %s [-f | -i | -n] [-v] source target\n"
500 " or: %s [-f | -i | -n] [-v] source ... directory\n"
501 " or: %s --help\n"
502 " or: %s --version\n",
503 g_progname, g_progname, g_progname, g_progname);
504 return EX_USAGE;
505}
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