source: trunk/src/gmake/kmkbuiltin/cp.c@ 933

Last change on this file since 933 was 809, checked in by bird, 19 years ago

Solaris + cleanup.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 14.7 KB
Line 
1/*
2 * Copyright (c) 1988, 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 * David Hitz of Auspex Systems Inc.
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) 1988, 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[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94";
42#endif /* not lint */
43#include <sys/cdefs.h>
44__FBSDID("$FreeBSD: src/bin/cp/cp.c,v 1.50 2004/04/06 20:06:44 markm Exp $");
45#endif
46
47/*
48 * Cp copies source files to target files.
49 *
50 * The global PATH_T structure "to" always contains the path to the
51 * current target file. Since fts(3) does not change directories,
52 * this path can be either absolute or dot-relative.
53 *
54 * The basic algorithm is to initialize "to" and use fts(3) to traverse
55 * the file hierarchy rooted in the argument list. A trivial case is the
56 * case of 'cp file1 file2'. The more interesting case is the case of
57 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
58 * path (relative to the root of the traversal) is appended to dir (stored
59 * in "to") to form the final target path.
60 */
61
62#include <sys/types.h>
63#include <sys/stat.h>
64
65#include "err.h"
66#include <errno.h>
67#include <fts.h>
68#include <limits.h>
69#include <signal.h>
70#include <stdio.h>
71#include <stdlib.h>
72#include <string.h>
73#include <unistd.h>
74
75#ifdef _MSC_VER
76# include "mscfakes.h"
77#endif
78
79#include "cp_extern.h"
80
81#ifndef S_IFWHT
82#define S_IFWHT 0
83#define S_ISWHT(s) 0
84#define undelete(s) (-1)
85#endif
86
87#ifndef S_ISTXT
88#ifdef S_ISVTX
89#define S_ISTXT S_ISVTX
90#else
91#define S_ISTXT 0
92#endif
93#endif /* !S_ISTXT */
94
95
96#define STRIP_TRAILING_SLASH(p) { \
97 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
98 *--(p).p_end = 0; \
99}
100
101/* have wrappers for globals in cp_extern! */
102
103const char *cp_argv0;
104static char emptystring[] = "";
105
106PATH_T to = { to.p_path, emptystring, "" };
107
108int fflag, iflag, nflag, pflag, vflag;
109static int Rflag, rflag;
110volatile sig_atomic_t info;
111
112enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
113
114static int copy(char *[], enum op, int);
115static int mastercmp(const FTSENT * const *, const FTSENT * const *);
116#ifdef SIGINFO
117static void siginfo(int __unused);
118#endif
119
120int
121kmk_builtin_cp(int argc, char *argv[])
122{
123 struct stat to_stat, tmp_stat;
124 enum op type;
125 int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
126 char *target;
127
128 /* init globals */
129 cp_argv0 = argv[0];
130 to.p_end = to.p_path;
131 to.target_end = emptystring;
132 memset(to.p_path, 0, sizeof(to.p_path));
133 fflag = iflag = nflag = pflag = vflag = Rflag = rflag = 0;
134 info = 0;
135
136 /* reset getopt and set progname. */
137 g_progname = argv[0];
138 opterr = 1;
139 optarg = NULL;
140 optopt = 0;
141#if defined(__FreeBSD__) || defined(__EMX__) || defined(__APPLE__)
142 optreset = 1;
143 optind = 1;
144#else
145 optind = 0; /* init */
146#endif
147
148 Hflag = Lflag = Pflag = 0;
149 while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
150 switch (ch) {
151 case 'H':
152 Hflag = 1;
153 Lflag = Pflag = 0;
154 break;
155 case 'L':
156 Lflag = 1;
157 Hflag = Pflag = 0;
158 break;
159 case 'P':
160 Pflag = 1;
161 Hflag = Lflag = 0;
162 break;
163 case 'R':
164#ifdef DO_CP_TREE
165 Rflag = 1;
166 break;
167#else
168 return errx(1, "recursive copy is not implemented!");
169#endif
170 case 'f':
171 fflag = 1;
172 iflag = nflag = 0;
173 break;
174 case 'i':
175 iflag = 1;
176 fflag = nflag = 0;
177 break;
178 case 'n':
179 nflag = 1;
180 fflag = iflag = 0;
181 break;
182 case 'p':
183 pflag = 1;
184 break;
185 case 'r':
186#ifdef DO_CP_TREE
187 rflag = 1;
188 break;
189#else
190 return errx(1, "recursive copy is not implemented!");
191#endif
192 case 'v':
193 vflag = 1;
194 break;
195 default:
196 return usage();
197 }
198 argc -= optind;
199 argv += optind;
200
201 if (argc < 2)
202 return usage();
203
204 fts_options = FTS_NOCHDIR | FTS_PHYSICAL;
205 if (rflag) {
206 if (Rflag)
207 return errx(1,
208 "the -R and -r options may not be specified together.");
209 if (Hflag || Lflag || Pflag)
210 errx(1,
211 "the -H, -L, and -P options may not be specified with the -r option.");
212#ifdef DO_CP_TREE
213 fts_options &= ~FTS_PHYSICAL;
214 fts_options |= FTS_LOGICAL;
215#endif
216 }
217#ifdef DO_CP_TREE
218 if (Rflag) {
219 if (Hflag)
220 fts_options |= FTS_COMFOLLOW;
221 if (Lflag) {
222 fts_options &= ~FTS_PHYSICAL;
223 fts_options |= FTS_LOGICAL;
224 }
225 } else
226#endif
227 {
228 fts_options &= ~FTS_PHYSICAL;
229 fts_options |= FTS_LOGICAL | FTS_COMFOLLOW;
230 }
231#ifdef SIGINFO
232 (void)signal(SIGINFO, siginfo);
233#endif
234
235 /* Save the target base in "to". */
236 target = argv[--argc];
237 if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
238 return errx(1, "%s: name too long", target);
239 to.p_end = to.p_path + strlen(to.p_path);
240 if (to.p_path == to.p_end) {
241 *to.p_end++ = '.';
242 *to.p_end = 0;
243 }
244 have_trailing_slash = (to.p_end[-1] == '/');
245 if (have_trailing_slash)
246 STRIP_TRAILING_SLASH(to);
247 to.target_end = to.p_end;
248
249 /* Set end of argument list for fts(3). */
250 argv[argc] = NULL;
251
252 /*
253 * Cp has two distinct cases:
254 *
255 * cp [-R] source target
256 * cp [-R] source1 ... sourceN directory
257 *
258 * In both cases, source can be either a file or a directory.
259 *
260 * In (1), the target becomes a copy of the source. That is, if the
261 * source is a file, the target will be a file, and likewise for
262 * directories.
263 *
264 * In (2), the real target is not directory, but "directory/source".
265 */
266 r = stat(to.p_path, &to_stat);
267 if (r == -1 && errno != ENOENT)
268 return err(1, "%s", to.p_path);
269 if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
270 /*
271 * Case (1). Target is not a directory.
272 */
273 if (argc > 1)
274 return usage();
275 /*
276 * Need to detect the case:
277 * cp -R dir foo
278 * Where dir is a directory and foo does not exist, where
279 * we want pathname concatenations turned on but not for
280 * the initial mkdir().
281 */
282 if (r == -1) {
283 if (rflag || (Rflag && (Lflag || Hflag)))
284 stat(*argv, &tmp_stat);
285 else
286 lstat(*argv, &tmp_stat);
287
288 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag))
289 type = DIR_TO_DNE;
290 else
291 type = FILE_TO_FILE;
292 } else
293 type = FILE_TO_FILE;
294
295 if (have_trailing_slash && type == FILE_TO_FILE) {
296 if (r == -1)
297 return errx(1, "directory %s does not exist",
298 to.p_path);
299 else
300 return errx(1, "%s is not a directory", to.p_path);
301 }
302 } else
303 /*
304 * Case (2). Target is a directory.
305 */
306 type = FILE_TO_DIR;
307
308 return copy(argv, type, fts_options);
309}
310
311static int
312copy(char *argv[], enum op type, int fts_options)
313{
314 struct stat to_stat;
315 FTS *ftsp;
316 FTSENT *curr;
317 int base = 0, dne, badcp, rval;
318 size_t nlen;
319 char *p, *target_mid;
320 mode_t mask, mode;
321
322 /*
323 * Keep an inverted copy of the umask, for use in correcting
324 * permissions on created directories when not using -p.
325 */
326 mask = ~umask(0777);
327 umask(~mask);
328
329 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
330 return err(1, "fts_open");
331 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
332 switch (curr->fts_info) {
333 case FTS_NS:
334 case FTS_DNR:
335 case FTS_ERR:
336 warnx("%s: %s",
337 curr->fts_path, strerror(curr->fts_errno));
338 badcp = rval = 1;
339 continue;
340 case FTS_DC: /* Warn, continue. */
341 warnx("%s: directory causes a cycle", curr->fts_path);
342 badcp = rval = 1;
343 continue;
344 default:
345 ;
346 }
347
348 /*
349 * If we are in case (2) or (3) above, we need to append the
350 * source name to the target name.
351 */
352 if (type != FILE_TO_FILE) {
353 /*
354 * Need to remember the roots of traversals to create
355 * correct pathnames. If there's a directory being
356 * copied to a non-existent directory, e.g.
357 * cp -R a/dir noexist
358 * the resulting path name should be noexist/foo, not
359 * noexist/dir/foo (where foo is a file in dir), which
360 * is the case where the target exists.
361 *
362 * Also, check for "..". This is for correct path
363 * concatenation for paths ending in "..", e.g.
364 * cp -R .. /tmp
365 * Paths ending in ".." are changed to ".". This is
366 * tricky, but seems the easiest way to fix the problem.
367 *
368 * XXX
369 * Since the first level MUST be FTS_ROOTLEVEL, base
370 * is always initialized.
371 */
372 if (curr->fts_level == FTS_ROOTLEVEL) {
373 if (type != DIR_TO_DNE) {
374 p = strrchr(curr->fts_path, '/');
375 base = (p == NULL) ? 0 :
376 (int)(p - curr->fts_path + 1);
377
378 if (!strcmp(&curr->fts_path[base],
379 ".."))
380 base += 1;
381 } else
382 base = curr->fts_pathlen;
383 }
384
385 p = &curr->fts_path[base];
386 nlen = curr->fts_pathlen - base;
387 target_mid = to.target_end;
388 if (*p != '/' && target_mid[-1] != '/')
389 *target_mid++ = '/';
390 *target_mid = 0;
391 if (target_mid - to.p_path + nlen >= PATH_MAX) {
392 warnx("%s%s: name too long (not copied)",
393 to.p_path, p);
394 badcp = rval = 1;
395 continue;
396 }
397 (void)strncat(target_mid, p, nlen);
398 to.p_end = target_mid + nlen;
399 *to.p_end = 0;
400 STRIP_TRAILING_SLASH(to);
401 }
402
403 if (curr->fts_info == FTS_DP) {
404 /*
405 * We are nearly finished with this directory. If we
406 * didn't actually copy it, or otherwise don't need to
407 * change its attributes, then we are done.
408 */
409 if (!curr->fts_number)
410 continue;
411 /*
412 * If -p is in effect, set all the attributes.
413 * Otherwise, set the correct permissions, limited
414 * by the umask. Optimise by avoiding a chmod()
415 * if possible (which is usually the case if we
416 * made the directory). Note that mkdir() does not
417 * honour setuid, setgid and sticky bits, but we
418 * normally want to preserve them on directories.
419 */
420 if (pflag) {
421 if (setfile(curr->fts_statp, -1))
422 rval = 1;
423 } else {
424 mode = curr->fts_statp->st_mode;
425 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) ||
426 ((mode | S_IRWXU) & mask) != (mode & mask))
427 if (chmod(to.p_path, mode & mask) != 0){
428 warn("chmod: %s", to.p_path);
429 rval = 1;
430 }
431 }
432 continue;
433 }
434
435 /* Not an error but need to remember it happened */
436 if (stat(to.p_path, &to_stat) == -1)
437 dne = 1;
438 else {
439 if (to_stat.st_dev == curr->fts_statp->st_dev &&
440 to_stat.st_dev != 0 &&
441 to_stat.st_ino == curr->fts_statp->st_ino &&
442 to_stat.st_ino != 0) {
443 warnx("%s and %s are identical (not copied).",
444 to.p_path, curr->fts_path);
445 badcp = rval = 1;
446 if (S_ISDIR(curr->fts_statp->st_mode))
447 (void)fts_set(ftsp, curr, FTS_SKIP);
448 continue;
449 }
450 if (!S_ISDIR(curr->fts_statp->st_mode) &&
451 S_ISDIR(to_stat.st_mode)) {
452 warnx("cannot overwrite directory %s with "
453 "non-directory %s",
454 to.p_path, curr->fts_path);
455 badcp = rval = 1;
456 continue;
457 }
458 dne = 0;
459 }
460
461 switch (curr->fts_statp->st_mode & S_IFMT) {
462#ifdef S_IFLNK
463 case S_IFLNK:
464 /* Catch special case of a non-dangling symlink */
465 if ((fts_options & FTS_LOGICAL) ||
466 ((fts_options & FTS_COMFOLLOW) &&
467 curr->fts_level == 0)) {
468 if (copy_file(curr, dne))
469 badcp = rval = 1;
470 } else {
471 if (copy_link(curr, !dne))
472 badcp = rval = 1;
473 }
474 break;
475#endif
476 case S_IFDIR:
477 if (!Rflag && !rflag) {
478 warnx("%s is a directory (not copied).",
479 curr->fts_path);
480 (void)fts_set(ftsp, curr, FTS_SKIP);
481 badcp = rval = 1;
482 break;
483 }
484 /*
485 * If the directory doesn't exist, create the new
486 * one with the from file mode plus owner RWX bits,
487 * modified by the umask. Trade-off between being
488 * able to write the directory (if from directory is
489 * 555) and not causing a permissions race. If the
490 * umask blocks owner writes, we fail..
491 */
492 if (dne) {
493 if (mkdir(to.p_path,
494 curr->fts_statp->st_mode | S_IRWXU) < 0)
495 return err(1, "%s", to.p_path);
496 } else if (!S_ISDIR(to_stat.st_mode)) {
497 errno = ENOTDIR;
498 return err(1, "%s", to.p_path);
499 }
500 /*
501 * Arrange to correct directory attributes later
502 * (in the post-order phase) if this is a new
503 * directory, or if the -p flag is in effect.
504 */
505 curr->fts_number = pflag || dne;
506 break;
507#ifdef S_IFBLK
508 case S_IFBLK:
509#endif
510 case S_IFCHR:
511 if (Rflag) {
512 if (copy_special(curr->fts_statp, !dne))
513 badcp = rval = 1;
514 } else {
515 if (copy_file(curr, dne))
516 badcp = rval = 1;
517 }
518 break;
519#ifdef S_IFIFO
520 case S_IFIFO:
521#endif
522 if (Rflag) {
523 if (copy_fifo(curr->fts_statp, !dne))
524 badcp = rval = 1;
525 } else {
526 if (copy_file(curr, dne))
527 badcp = rval = 1;
528 }
529 break;
530 default:
531 if (copy_file(curr, dne))
532 badcp = rval = 1;
533 break;
534 }
535 if (vflag && !badcp)
536 (void)printf("%s -> %s\n", curr->fts_path, to.p_path);
537 }
538 if (errno)
539 return err(1, "fts_read");
540 return (rval);
541}
542
543/*
544 * mastercmp --
545 * The comparison function for the copy order. The order is to copy
546 * non-directory files before directory files. The reason for this
547 * is because files tend to be in the same cylinder group as their
548 * parent directory, whereas directories tend not to be. Copying the
549 * files first reduces seeking.
550 */
551static int
552mastercmp(const FTSENT * const *a, const FTSENT * const *b)
553{
554 int a_info, b_info;
555
556 a_info = (*a)->fts_info;
557 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR)
558 return (0);
559 b_info = (*b)->fts_info;
560 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR)
561 return (0);
562 if (a_info == FTS_D)
563 return (-1);
564 if (b_info == FTS_D)
565 return (1);
566 return (0);
567}
568
569#ifdef SIGINFO
570static void
571siginfo(int sig __unused)
572{
573
574 info = 1;
575}
576#endif
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