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source: kBuild/trunk/src/kmk/kmkbuiltin/mv.c@ 2012

Last change on this file since 2012 was 1710, checked in by bird, 16 years ago

kmk: Made chmod build on windows. Some cleanup of the bsdisms.
  • 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
99extern void bsd_strmode(mode_t mode, char *p);
100
101#if !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__DragonFly__)
102# ifdef __OS2__
103static
104# endif
105const char *user_from_uid(uid_t id, int x)
106{
107 static char s_buf[64];
108 sprintf(s_buf, "%ld", id);
109 return s_buf;
110}
111# ifdef __OS2__
112static
113# endif
114const char *group_from_gid(gid_t id, int x)
115{
116 static char s_buf[64];
117 sprintf(s_buf, "%ld", id);
118 return s_buf;
119}
120#endif /* 'not in libc' */
121
122
123int
124kmk_builtin_mv(int argc, char *argv[], char **envp)
125{
126 size_t baselen, len;
127 int rval;
128 char *p, *endp;
129 struct stat sb;
130 int ch;
131 char path[PATH_MAX];
132
133 /* kmk: reinitialize globals */
134 fflg = iflg = nflg = vflg = 0;
135
136 /* kmk: reset getopt and set progname */
137 g_progname = argv[0];
138 opterr = 1;
139 optarg = NULL;
140 optopt = 0;
141 optind = 0; /* init */
142
143 while ((ch = getopt_long(argc, argv, "finv", long_options, NULL)) != -1)
144 switch (ch) {
145 case 'i':
146 iflg = 1;
147 fflg = nflg = 0;
148 break;
149 case 'f':
150 fflg = 1;
151 iflg = nflg = 0;
152 break;
153 case 'n':
154 nflg = 1;
155 fflg = iflg = 0;
156 break;
157 case 'v':
158 vflg = 1;
159 break;
160 case 261:
161 usage(stdout);
162 return 0;
163 case 262:
164 return kbuild_version(argv[0]);
165 default:
166 return usage(stderr);
167 }
168 argc -= optind;
169 argv += optind;
170
171 if (argc < 2)
172 return usage(stderr);
173
174 /*
175 * If the stat on the target fails or the target isn't a directory,
176 * try the move. More than 2 arguments is an error in this case.
177 */
178 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
179 if (argc > 2)
180 return usage(stderr);
181 return do_move(argv[0], argv[1]);
182 }
183
184 /* It's a directory, move each file into it. */
185 if (strlen(argv[argc - 1]) > sizeof(path) - 1)
186 return errx(1, "%s: destination pathname too long", *argv);
187 (void)strcpy(path, argv[argc - 1]);
188 baselen = strlen(path);
189 endp = &path[baselen];
190#if defined(_MSC_VER) || defined(__EMX__)
191 if (!baselen || (*(endp - 1) != '/' && *(endp - 1) != '\\' && *(endp - 1) != ':')) {
192#else
193 if (!baselen || *(endp - 1) != '/') {
194#endif
195 *endp++ = '/';
196 ++baselen;
197 }
198 for (rval = 0; --argc; ++argv) {
199 /*
200 * Find the last component of the source pathname. It
201 * may have trailing slashes.
202 */
203 p = *argv + strlen(*argv);
204#if defined(_MSC_VER) || defined(__EMX__)
205 while (p != *argv && (p[-1] == '/' || p[-1] == '\\'))
206 --p;
207 while (p != *argv && p[-1] != '/' && p[-1] != '/' && p[-1] != ':')
208 --p;
209#else
210 while (p != *argv && p[-1] == '/')
211 --p;
212 while (p != *argv && p[-1] != '/')
213 --p;
214#endif
215
216 if ((baselen + (len = strlen(p))) >= PATH_MAX) {
217 warnx("%s: destination pathname too long", *argv);
218 rval = 1;
219 } else {
220 memmove(endp, p, (size_t)len + 1);
221 if (do_move(*argv, path))
222 rval = 1;
223 }
224 }
225 return rval;
226}
227
228static int
229do_move(char *from, char *to)
230{
231 struct stat sb;
232 int ask, ch, first;
233 char modep[15];
234
235 /*
236 * Check access. If interactive and file exists, ask user if it
237 * should be replaced. Otherwise if file exists but isn't writable
238 * make sure the user wants to clobber it.
239 */
240 if (!fflg && !access(to, F_OK)) {
241
242 /* prompt only if source exist */
243 if (lstat(from, &sb) == -1) {
244 warn("%s", from);
245 return (1);
246 }
247
248#define YESNO "(y/n [n]) "
249 ask = 0;
250 if (nflg) {
251 if (vflg)
252 printf("%s not overwritten\n", to);
253 return (0);
254 } else if (iflg) {
255 (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
256 ask = 1;
257 } else if (access(to, W_OK) && !stat(to, &sb)) {
258 bsd_strmode(sb.st_mode, modep);
259 (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
260 modep + 1, modep[9] == ' ' ? "" : " ",
261 user_from_uid((unsigned long)sb.st_uid, 0),
262 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO);
263 ask = 1;
264 }
265 if (ask) {
266 first = ch = getchar();
267 while (ch != '\n' && ch != EOF)
268 ch = getchar();
269 if (first != 'y' && first != 'Y') {
270 (void)fprintf(stderr, "not overwritten\n");
271 return (0);
272 }
273 }
274 }
275 if (!rename(from, to)) {
276 if (vflg)
277 printf("%s -> %s\n", from, to);
278 return (0);
279 }
280#ifdef _MSC_VER
281 if (errno == EEXIST) {
282 remove(to);
283 if (!rename(from, to)) {
284 if (vflg)
285 printf("%s -> %s\n", from, to);
286 return (0);
287 }
288 }
289#endif
290
291 if (errno == EXDEV) {
292#ifndef CROSS_DEVICE_MOVE
293 warnx("cannot move `%s' to a different device: `%s'", from, to);
294 return (1);
295#else
296 struct statfs sfs;
297 char path[PATH_MAX];
298
299 /*
300 * If the source is a symbolic link and is on another
301 * filesystem, it can be recreated at the destination.
302 */
303 if (lstat(from, &sb) == -1) {
304 warn("%s", from);
305 return (1);
306 }
307 if (!S_ISLNK(sb.st_mode)) {
308 /* Can't mv(1) a mount point. */
309 if (realpath(from, path) == NULL) {
310 warnx("cannot resolve %s: %s", from, path);
311 return (1);
312 }
313 if (!statfs(path, &sfs) &&
314 !strcmp(path, sfs.f_mntonname)) {
315 warnx("cannot rename a mount point");
316 return (1);
317 }
318 }
319#endif
320 } else {
321 warn("rename %s to %s", from, to);
322 return (1);
323 }
324
325#ifdef CROSS_DEVICE_MOVE
326 /*
327 * If rename fails because we're trying to cross devices, and
328 * it's a regular file, do the copy internally; otherwise, use
329 * cp and rm.
330 */
331 if (lstat(from, &sb)) {
332 warn("%s", from);
333 return (1);
334 }
335 return (S_ISREG(sb.st_mode) ?
336 fastcopy(from, to, &sb) : copy(from, to));
337#endif
338}
339
340#ifdef CROSS_DEVICE_MOVE
341int
342static fastcopy(char *from, char *to, struct stat *sbp)
343{
344 struct timeval tval[2];
345 static u_int blen;
346 static char *bp;
347 mode_t oldmode;
348 int nread, from_fd, to_fd;
349 acl_t acl;
350
351 if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
352 warn("%s", from);
353 return (1);
354 }
355 if (blen < sbp->st_blksize) {
356 if (bp != NULL)
357 free(bp);
358 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) {
359 blen = 0;
360 warnx("malloc failed");
361 return (1);
362 }
363 blen = sbp->st_blksize;
364 }
365 while ((to_fd =
366 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
367 if (errno == EEXIST && unlink(to) == 0)
368 continue;
369 warn("%s", to);
370 (void)close(from_fd);
371 return (1);
372 }
373 while ((nread = read(from_fd, bp, (size_t)blen)) > 0)
374 if (write(to_fd, bp, (size_t)nread) != nread) {
375 warn("%s", to);
376 goto err;
377 }
378 if (nread < 0) {
379 warn("%s", from);
380err: if (unlink(to))
381 warn("%s: remove", to);
382 (void)close(from_fd);
383 (void)close(to_fd);
384 return (1);
385 }
386
387 oldmode = sbp->st_mode & ALLPERMS;
388 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
389 warn("%s: set owner/group (was: %lu/%lu)", to,
390 (u_long)sbp->st_uid, (u_long)sbp->st_gid);
391 if (oldmode & (S_ISUID | S_ISGID)) {
392 warnx(
393"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
394 to, oldmode);
395 sbp->st_mode &= ~(S_ISUID | S_ISGID);
396 }
397 }
398 /*
399 * POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect
400 * for dest_file, then it's ACLs shall reflect the ACLs of the
401 * source_file.
402 */
403 if (fpathconf(to_fd, _PC_ACL_EXTENDED) == 1 &&
404 fpathconf(from_fd, _PC_ACL_EXTENDED) == 1) {
405 acl = acl_get_fd(from_fd);
406 if (acl == NULL)
407 warn("failed to get acl entries while setting %s",
408 from);
409 else if (acl_set_fd(to_fd, acl) < 0)
410 warn("failed to set acl entries for %s", to);
411 }
412 (void)close(from_fd);
413 if (fchmod(to_fd, sbp->st_mode))
414 warn("%s: set mode (was: 0%03o)", to, oldmode);
415 /*
416 * XXX
417 * NFS doesn't support chflags; ignore errors unless there's reason
418 * to believe we're losing bits. (Note, this still won't be right
419 * if the server supports flags and we were trying to *remove* flags
420 * on a file that we copied, i.e., that we didn't create.)
421 */
422 errno = 0;
423 if (fchflags(to_fd, (u_long)sbp->st_flags))
424 if (errno != EOPNOTSUPP || sbp->st_flags != 0)
425 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
426
427 tval[0].tv_sec = sbp->st_atime;
428 tval[1].tv_sec = sbp->st_mtime;
429 tval[0].tv_usec = tval[1].tv_usec = 0;
430 if (utimes(to, tval))
431 warn("%s: set times", to);
432
433 if (close(to_fd)) {
434 warn("%s", to);
435 return (1);
436 }
437
438 if (unlink(from)) {
439 warn("%s: remove", from);
440 return (1);
441 }
442 if (vflg)
443 printf("%s -> %s\n", from, to);
444 return (0);
445}
446
447int
448copy(char *from, char *to)
449{
450 int pid, status;
451
452 if ((pid = fork()) == 0) {
453 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to,
454 (char *)NULL);
455 warn("%s", _PATH_CP);
456 _exit(1);
457 }
458 if (waitpid(pid, &status, 0) == -1) {
459 warn("%s: waitpid", _PATH_CP);
460 return (1);
461 }
462 if (!WIFEXITED(status)) {
463 warnx("%s: did not terminate normally", _PATH_CP);
464 return (1);
465 }
466 if (WEXITSTATUS(status)) {
467 warnx("%s: terminated with %d (non-zero) status",
468 _PATH_CP, WEXITSTATUS(status));
469 return (1);
470 }
471 if (!(pid = vfork())) {
472 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL);
473 warn("%s", _PATH_RM);
474 _exit(1);
475 }
476 if (waitpid(pid, &status, 0) == -1) {
477 warn("%s: waitpid", _PATH_RM);
478 return (1);
479 }
480 if (!WIFEXITED(status)) {
481 warnx("%s: did not terminate normally", _PATH_RM);
482 return (1);
483 }
484 if (WEXITSTATUS(status)) {
485 warnx("%s: terminated with %d (non-zero) status",
486 _PATH_RM, WEXITSTATUS(status));
487 return (1);
488 }
489 return (0);
490}
491#endif /* CROSS_DEVICE_MOVE */
492
493
494static int
495usage(FILE *pf)
496{
497 fprintf(pf, "usage: %s [-f | -i | -n] [-v] source target\n"
498 " or: %s [-f | -i | -n] [-v] source ... directory\n"
499 " or: %s --help\n"
500 " or: %s --version\n",
501 g_progname, g_progname, g_progname, g_progname);
502 return EX_USAGE;
503}
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