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Patrick Welche <prlw1@cam.ac.uk>
[netbsd-mini2440.git] / external / bsd / libarchive / dist / cpio / cpio.c
blob76a91cf71528b2653328bb45c07d3fa3d2b678bb
1 /*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27
28 #include "cpio_platform.h"
29 __FBSDID("$FreeBSD: src/usr.bin/cpio/cpio.c,v 1.4 2008/06/24 15:18:40 kientzle Exp $");
30
31 #include <sys/types.h>
32 #include <archive.h>
33 #include <archive_entry.h>
34
35 #ifdef HAVE_SYS_STAT_H
36 #include <sys/stat.h>
37 #endif
38 #ifdef HAVE_ERRNO_H
39 #include <errno.h>
40 #endif
41 #ifdef HAVE_FCNTL_H
42 #include <fcntl.h>
43 #endif
44 #ifdef HAVE_STDARG_H
45 #include <stdarg.h>
46 #endif
47 #include <stdio.h>
48 #ifdef HAVE_STDLIB_H
49 #include <stdlib.h>
50 #endif
51 #ifdef HAVE_STRING_H
52 #include <string.h>
53 #endif
54 #ifdef HAVE_UNISTD_H
55 #include <unistd.h>
56 #endif
57
58 #include "cpio.h"
59 #include "matching.h"
60
61 static int copy_data(struct archive *, struct archive *);
62 static const char *cpio_rename(const char *name);
63 static int entry_to_archive(struct cpio *, struct archive_entry *);
64 static int file_to_archive(struct cpio *, const char *);
65 static void long_help(void);
66 static void mode_in(struct cpio *);
67 static void mode_list(struct cpio *);
68 static void mode_out(struct cpio *);
69 static void mode_pass(struct cpio *, const char *);
70 static void restore_time(struct cpio *, struct archive_entry *,
71 const char *, int fd);
72 static void usage(void);
73 static void version(void);
74
75 int
76 main(int argc, char *argv[])
77 {
78 static char buff[16384];
79 struct cpio _cpio; /* Allocated on stack. */
80 struct cpio *cpio;
81 int uid, gid;
82 int opt;
83
84 cpio = &_cpio;
85 memset(cpio, 0, sizeof(*cpio));
86 cpio->buff = buff;
87 cpio->buff_size = sizeof(buff);
88
89 /* Need cpio_progname before calling cpio_warnc. */
90 if (*argv == NULL)
91 cpio_progname = "bsdcpio";
92 else {
93 cpio_progname = strrchr(*argv, '/');
94 if (cpio_progname != NULL)
95 cpio_progname++;
96 else
97 cpio_progname = *argv;
98 }
99
100 cpio->uid_override = -1;
101 cpio->gid_override = -1;
102 cpio->argv = argv;
103 cpio->argc = argc;
104 cpio->line_separator = '\n';
105 cpio->mode = '\0';
106 cpio->verbose = 0;
107 cpio->compress = '\0';
108 /* TODO: Implement old binary format in libarchive, use that here. */
109 cpio->format = "odc"; /* Default format */
110 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
111 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
112 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
113 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
114 /* TODO: If run by root, set owner as well. */
115 cpio->bytes_per_block = 512;
116 cpio->filename = NULL;
117
118 while ((opt = cpio_getopt(cpio)) != -1) {
119 switch (opt) {
120 case '0': /* GNU convention: --null, -0 */
121 cpio->line_separator = '\0';
122 break;
123 case 'A': /* NetBSD/OpenBSD */
124 cpio->option_append = 1;
125 break;
126 case 'a': /* POSIX 1997 */
127 cpio->option_atime_restore = 1;
128 break;
129 case 'B': /* POSIX 1997 */
130 cpio->bytes_per_block = 5120;
131 break;
132 case 'C': /* NetBSD/OpenBSD */
133 cpio->bytes_per_block = atoi(optarg);
134 if (cpio->bytes_per_block <= 0)
135 cpio_errc(1, 0, "Invalid blocksize %s", optarg);
136 break;
137 case 'c': /* POSIX 1997 */
138 cpio->format = "odc";
139 break;
140 case 'd': /* POSIX 1997 */
141 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
142 break;
143 case 'E': /* NetBSD/OpenBSD */
144 include_from_file(cpio, optarg);
145 break;
146 case 'F': /* NetBSD/OpenBSD/GNU cpio */
147 cpio->filename = optarg;
148 break;
149 case 'f': /* POSIX 1997 */
150 exclude(cpio, optarg);
151 break;
152 case 'H': /* GNU cpio (also --format) */
153 cpio->format = optarg;
154 break;
155 case 'h':
156 long_help();
157 break;
158 case 'I': /* NetBSD/OpenBSD */
159 cpio->filename = optarg;
160 break;
161 case 'i': /* POSIX 1997 */
162 cpio->mode = opt;
163 break;
164 case OPTION_INSECURE:
165 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
166 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
167 break;
168 case 'L': /* GNU cpio */
169 cpio->option_follow_links = 1;
170 break;
171 case 'l': /* POSIX 1997 */
172 cpio->option_link = 1;
173 break;
174 case 'm': /* POSIX 1997 */
175 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
176 break;
177 case 'O': /* GNU cpio */
178 cpio->filename = optarg;
179 break;
180 case 'o': /* POSIX 1997 */
181 cpio->mode = opt;
182 break;
183 case 'p': /* POSIX 1997 */
184 cpio->mode = opt;
185 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
186 break;
187 case OPTION_QUIET: /* GNU cpio */
188 cpio->quiet = 1;
189 break;
190 case 'R': /* GNU cpio, also --owner */
191 if (owner_parse(optarg, &uid, &gid))
192 usage();
193 if (uid != -1)
194 cpio->uid_override = uid;
195 if (gid != -1)
196 cpio->gid_override = gid;
197 break;
198 case 'r': /* POSIX 1997 */
199 cpio->option_rename = 1;
200 break;
201 case 't': /* POSIX 1997 */
202 cpio->option_list = 1;
203 break;
204 case 'u': /* POSIX 1997 */
205 cpio->extract_flags
206 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
207 break;
208 case 'v': /* POSIX 1997 */
209 cpio->verbose++;
210 break;
211 case OPTION_VERSION: /* GNU convention */
212 version();
213 break;
214 #if 0
215 /*
216 * cpio_getopt() handles -W specially, so it's not
217 * available here.
218 */
219 case 'W': /* Obscure, but useful GNU convention. */
220 break;
221 #endif
222 case 'y': /* tar convention */
223 cpio->compress = opt;
224 break;
225 case 'Z': /* tar convention */
226 cpio->compress = opt;
227 break;
228 case 'z': /* tar convention */
229 cpio->compress = opt;
230 break;
231 default:
232 usage();
233 }
234 }
235
236 /* TODO: Sanity-check args, error out on nonsensical combinations. */
237
238 cpio->argc -= optind;
239 cpio->argv += optind;
240
241 switch (cpio->mode) {
242 case 'o':
243 mode_out(cpio);
244 break;
245 case 'i':
246 while (*cpio->argv != NULL) {
247 include(cpio, *cpio->argv);
248 --cpio->argc;
249 ++cpio->argv;
250 }
251 if (cpio->option_list)
252 mode_list(cpio);
253 else
254 mode_in(cpio);
255 break;
256 case 'p':
257 if (*cpio->argv == NULL || **cpio->argv == '\0')
258 cpio_errc(1, 0,
259 "-p mode requires a target directory");
260 mode_pass(cpio, *cpio->argv);
261 break;
262 default:
263 cpio_errc(1, 0,
264 "Must specify at least one of -i, -o, or -p");
265 }
266
267 return (0);
268 }
269
270 void
271 usage(void)
272 {
273 const char *p;
274
275 p = cpio_progname;
276
277 fprintf(stderr, "Brief Usage:\n");
278 fprintf(stderr, " List: %s -it < archive\n", p);
279 fprintf(stderr, " Extract: %s -i < archive\n", p);
280 fprintf(stderr, " Create: %s -o < filenames > archive\n", p);
281 #ifdef HAVE_GETOPT_LONG
282 fprintf(stderr, " Help: %s --help\n", p);
283 #else
284 fprintf(stderr, " Help: %s -h\n", p);
285 #endif
286 exit(1);
287 }
288
289 static const char *long_help_msg =
290 "First option must be a mode specifier:\n"
291 " -i Input -o Output -p Pass\n"
292 "Common Options:\n"
293 " -v Verbose\n"
294 "Create: %p -o [options] < [list of files] > [archive]\n"
295 " -z, -y Compress archive with gzip/bzip2\n"
296 " --format {odc|newc|ustar} Select archive format\n"
297 "List: %p -it < [archive]\n"
298 "Extract: %p -i [options] < [archive]\n";
299
300
301 /*
302 * Note that the word 'bsdcpio' will always appear in the first line
303 * of output.
304 *
305 * In particular, /bin/sh scripts that need to test for the presence
306 * of bsdcpio can use the following template:
307 *
308 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \
309 * echo bsdcpio; else echo not bsdcpio; fi
310 */
311 static void
312 long_help(void)
313 {
314 const char *prog;
315 const char *p;
316
317 prog = cpio_progname;
318
319 fflush(stderr);
320
321 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";
322 printf("%s%s: manipulate archive files\n", prog, p);
323
324 for (p = long_help_msg; *p != '\0'; p++) {
325 if (*p == '%') {
326 if (p[1] == 'p') {
327 fputs(prog, stdout);
328 p++;
329 } else
330 putchar('%');
331 } else
332 putchar(*p);
333 }
334 version();
335 }
336
337 static void
338 version(void)
339 {
340 fprintf(stdout,"bsdcpio %s -- %s\n",
341 BSDCPIO_VERSION_STRING,
342 archive_version());
343 exit(0);
344 }
345
346 static void
347 mode_out(struct cpio *cpio)
348 {
349 unsigned long blocks;
350 struct archive_entry *entry, *spare;
351 struct line_reader *lr;
352 const char *p;
353 int r;
354
355 if (cpio->option_append)
356 cpio_errc(1, 0, "Append mode not yet supported.");
357 cpio->archive = archive_write_new();
358 if (cpio->archive == NULL)
359 cpio_errc(1, 0, "Failed to allocate archive object");
360 switch (cpio->compress) {
361 case 'j': case 'y':
362 archive_write_set_compression_bzip2(cpio->archive);
363 break;
364 case 'z':
365 archive_write_set_compression_gzip(cpio->archive);
366 break;
367 case 'Z':
368 archive_write_set_compression_compress(cpio->archive);
369 break;
370 default:
371 archive_write_set_compression_none(cpio->archive);
372 break;
373 }
374 r = archive_write_set_format_by_name(cpio->archive, cpio->format);
375 if (r != ARCHIVE_OK)
376 cpio_errc(1, 0, archive_error_string(cpio->archive));
377 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block);
378 cpio->linkresolver = archive_entry_linkresolver_new();
379 archive_entry_linkresolver_set_strategy(cpio->linkresolver,
380 archive_format(cpio->archive));
381
382 r = archive_write_open_file(cpio->archive, cpio->filename);
383 if (r != ARCHIVE_OK)
384 cpio_errc(1, 0, archive_error_string(cpio->archive));
385 lr = process_lines_init("-", cpio->line_separator);
386 while ((p = process_lines_next(lr)) != NULL)
387 file_to_archive(cpio, p);
388 process_lines_free(lr);
389
390 /*
391 * The hardlink detection may have queued up a couple of entries
392 * that can now be flushed.
393 */
394 entry = NULL;
395 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
396 while (entry != NULL) {
397 entry_to_archive(cpio, entry);
398 archive_entry_free(entry);
399 entry = NULL;
400 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
401 }
402
403 r = archive_write_close(cpio->archive);
404 if (r != ARCHIVE_OK)
405 cpio_errc(1, 0, archive_error_string(cpio->archive));
406
407 if (!cpio->quiet) {
408 blocks = (archive_position_uncompressed(cpio->archive) + 511)
409 / 512;
410 fprintf(stderr, "%lu %s\n", blocks,
411 blocks == 1 ? "block" : "blocks");
412 }
413 archive_write_finish(cpio->archive);
414 }
415
416 /*
417 * This is used by both out mode (to copy objects from disk into
418 * an archive) and pass mode (to copy objects from disk to
419 * an archive_write_disk "archive").
420 */
421 static int
422 file_to_archive(struct cpio *cpio, const char *srcpath)
423 {
424 struct stat st;
425 const char *destpath;
426 struct archive_entry *entry, *spare;
427 size_t len;
428 const char *p;
429 int lnklen;
430 int r;
431
432 /*
433 * Create an archive_entry describing the source file.
434 */
435 entry = archive_entry_new();
436 if (entry == NULL)
437 cpio_errc(1, 0, "Couldn't allocate entry");
438 archive_entry_copy_sourcepath(entry, srcpath);
439
440 /* Get stat information. */
441 if (cpio->option_follow_links)
442 r = stat(srcpath, &st);
443 else
444 r = lstat(srcpath, &st);
445 if (r != 0) {
446 cpio_warnc(errno, "Couldn't stat \"%s\"", srcpath);
447 archive_entry_free(entry);
448 return (0);
449 }
450
451 if (cpio->uid_override >= 0)
452 st.st_uid = cpio->uid_override;
453 if (cpio->gid_override >= 0)
454 st.st_gid = cpio->uid_override;
455 archive_entry_copy_stat(entry, &st);
456
457 /* If its a symlink, pull the target. */
458 if (S_ISLNK(st.st_mode)) {
459 lnklen = readlink(srcpath, cpio->buff, cpio->buff_size);
460 if (lnklen < 0) {
461 cpio_warnc(errno,
462 "%s: Couldn't read symbolic link", srcpath);
463 archive_entry_free(entry);
464 return (0);
465 }
466 cpio->buff[lnklen] = 0;
467 archive_entry_set_symlink(entry, cpio->buff);
468 }
469
470 /*
471 * Generate a destination path for this entry.
472 * "destination path" is the name to which it will be copied in
473 * pass mode or the name that will go into the archive in
474 * output mode.
475 */
476 destpath = srcpath;
477 if (cpio->destdir) {
478 len = strlen(cpio->destdir) + strlen(srcpath) + 8;
479 if (len >= cpio->pass_destpath_alloc) {
480 while (len >= cpio->pass_destpath_alloc) {
481 cpio->pass_destpath_alloc += 512;
482 cpio->pass_destpath_alloc *= 2;
483 }
484 free(cpio->pass_destpath);
485 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);
486 if (cpio->pass_destpath == NULL)
487 cpio_errc(1, ENOMEM,
488 "Can't allocate path buffer");
489 }
490 strcpy(cpio->pass_destpath, cpio->destdir);
491 p = srcpath;
492 while (p[0] == '/')
493 ++p;
494 strcat(cpio->pass_destpath, p);
495 destpath = cpio->pass_destpath;
496 }
497 if (cpio->option_rename)
498 destpath = cpio_rename(destpath);
499 if (destpath == NULL)
500 return (0);
501 archive_entry_copy_pathname(entry, destpath);
502
503 /*
504 * If we're trying to preserve hardlinks, match them here.
505 */
506 spare = NULL;
507 if (cpio->linkresolver != NULL
508 && !S_ISDIR(st.st_mode)) {
509 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
510 }
511
512 if (entry != NULL) {
513 r = entry_to_archive(cpio, entry);
514 archive_entry_free(entry);
515 }
516 if (spare != NULL) {
517 if (r == 0)
518 r = entry_to_archive(cpio, spare);
519 archive_entry_free(spare);
520 }
521 return (r);
522 }
523
524 static int
525 entry_to_archive(struct cpio *cpio, struct archive_entry *entry)
526 {
527 const char *destpath = archive_entry_pathname(entry);
528 const char *srcpath = archive_entry_sourcepath(entry);
529 int fd = -1;
530 ssize_t bytes_read;
531 int r;
532
533 /* Print out the destination name to the user. */
534 if (cpio->verbose)
535 fprintf(stderr,"%s", destpath);
536
537 /*
538 * Option_link only makes sense in pass mode and for
539 * regular files. Also note: if a link operation fails
540 * because of cross-device restrictions, we'll fall back
541 * to copy mode for that entry.
542 *
543 * TODO: Test other cpio implementations to see if they
544 * hard-link anything other than regular files here.
545 */
546 if (cpio->option_link
547 && archive_entry_filetype(entry) == AE_IFREG)
548 {
549 struct archive_entry *t;
550 /* Save the original entry in case we need it later. */
551 t = archive_entry_clone(entry);
552 if (t == NULL)
553 cpio_errc(1, ENOMEM, "Can't create link");
554 /* Note: link(2) doesn't create parent directories,
555 * so we use archive_write_header() instead as a
556 * convenience. */
557 archive_entry_set_hardlink(t, srcpath);
558 /* This is a straight link that carries no data. */
559 archive_entry_set_size(t, 0);
560 r = archive_write_header(cpio->archive, t);
561 archive_entry_free(t);
562 if (r != ARCHIVE_OK)
563 cpio_warnc(archive_errno(cpio->archive),
564 archive_error_string(cpio->archive));
565 if (r == ARCHIVE_FATAL)
566 exit(1);
567 #ifdef EXDEV
568 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {
569 /* Cross-device link: Just fall through and use
570 * the original entry to copy the file over. */
571 cpio_warnc(0, "Copying file instead");
572 } else
573 #endif
574 return (0);
575 }
576
577 /*
578 * Make sure we can open the file (if necessary) before
579 * trying to write the header.
580 */
581 if (archive_entry_filetype(entry) == AE_IFREG) {
582 if (archive_entry_size(entry) > 0) {
583 fd = open(srcpath, O_RDONLY);
584 if (fd < 0) {
585 cpio_warnc(errno,
586 "%s: could not open file", srcpath);
587 goto cleanup;
588 }
589 }
590 } else {
591 archive_entry_set_size(entry, 0);
592 }
593
594 r = archive_write_header(cpio->archive, entry);
595
596 if (r != ARCHIVE_OK)
597 cpio_warnc(archive_errno(cpio->archive),
598 "%s: %s",
599 destpath,
600 archive_error_string(cpio->archive));
601
602 if (r == ARCHIVE_FATAL)
603 exit(1);
604
605 if (r >= ARCHIVE_WARN && fd >= 0) {
606 bytes_read = read(fd, cpio->buff, cpio->buff_size);
607 while (bytes_read > 0) {
608 r = archive_write_data(cpio->archive,
609 cpio->buff, bytes_read);
610 if (r < 0)
611 cpio_errc(1, archive_errno(cpio->archive),
612 archive_error_string(cpio->archive));
613 if (r < bytes_read) {
614 cpio_warnc(0,
615 "Truncated write; file may have grown while being archived.");
616 }
617 bytes_read = read(fd, cpio->buff, cpio->buff_size);
618 }
619 }
620
621 restore_time(cpio, entry, srcpath, fd);
622
623 cleanup:
624 if (cpio->verbose)
625 fprintf(stderr,"\n");
626 if (fd >= 0)
627 close(fd);
628 return (0);
629 }
630
631 static void
632 restore_time(struct cpio *cpio, struct archive_entry *entry,
633 const char *name, int fd)
634 {
635 #ifndef HAVE_UTIMES
636 static int warned = 0;
637
638 (void)cpio; /* UNUSED */
639 (void)entry; /* UNUSED */
640 (void)name; /* UNUSED */
641 (void)fd; /* UNUSED */
642
643 if (!warned)
644 cpio_warnc(0, "Can't restore access times on this platform");
645 warned = 1;
646 return;
647 #else
648 struct timeval times[2];
649
650 if (!cpio->option_atime_restore)
651 return;
652
653 times[1].tv_sec = archive_entry_mtime(entry);
654 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
655
656 times[0].tv_sec = archive_entry_atime(entry);
657 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
658
659 #ifdef HAVE_FUTIMES
660 if (fd >= 0 && futimes(fd, times) == 0)
661 return;
662 #endif
663
664 #ifdef HAVE_LUTIMES
665 if (lutimes(name, times) != 0)
666 #else
667 if (!S_ISLNK(archive_entry_mode(entry)) && utimes(name, times) != 0)
668 #endif
669 cpio_warnc(errno, "Can't update time for %s", name);
670 #endif
671 }
672
673
674 static void
675 mode_in(struct cpio *cpio)
676 {
677 struct archive *a;
678 struct archive_entry *entry;
679 struct archive *ext;
680 const char *destpath;
681 unsigned long blocks;
682 int r;
683
684 ext = archive_write_disk_new();
685 if (ext == NULL)
686 cpio_errc(1, 0, "Couldn't allocate restore object");
687 r = archive_write_disk_set_options(ext, cpio->extract_flags);
688 if (r != ARCHIVE_OK)
689 cpio_errc(1, 0, archive_error_string(ext));
690 a = archive_read_new();
691 if (a == NULL)
692 cpio_errc(1, 0, "Couldn't allocate archive object");
693 archive_read_support_compression_all(a);
694 archive_read_support_format_all(a);
695
696 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
697 cpio_errc(1, archive_errno(a),
698 archive_error_string(a));
699 for (;;) {
700 r = archive_read_next_header(a, &entry);
701 if (r == ARCHIVE_EOF)
702 break;
703 if (r != ARCHIVE_OK) {
704 cpio_errc(1, archive_errno(a),
705 archive_error_string(a));
706 }
707 if (excluded(cpio, archive_entry_pathname(entry)))
708 continue;
709 if (cpio->option_rename) {
710 destpath = cpio_rename(archive_entry_pathname(entry));
711 archive_entry_set_pathname(entry, destpath);
712 } else
713 destpath = archive_entry_pathname(entry);
714 if (destpath == NULL)
715 continue;
716 if (cpio->verbose)
717 fprintf(stdout, "%s\n", destpath);
718 if (cpio->uid_override >= 0)
719 archive_entry_set_uid(entry, cpio->uid_override);
720 if (cpio->gid_override >= 0)
721 archive_entry_set_gid(entry, cpio->gid_override);
722 r = archive_write_header(ext, entry);
723 if (r != ARCHIVE_OK) {
724 fprintf(stderr, "%s: %s\n",
725 archive_entry_pathname(entry),
726 archive_error_string(ext));
727 } else if (archive_entry_size(entry) > 0) {
728 r = copy_data(a, ext);
729 }
730 }
731 r = archive_read_close(a);
732 if (r != ARCHIVE_OK)
733 cpio_errc(1, 0, archive_error_string(a));
734 r = archive_write_close(ext);
735 if (r != ARCHIVE_OK)
736 cpio_errc(1, 0, archive_error_string(ext));
737 if (!cpio->quiet) {
738 blocks = (archive_position_uncompressed(a) + 511)
739 / 512;
740 fprintf(stderr, "%lu %s\n", blocks,
741 blocks == 1 ? "block" : "blocks");
742 }
743 archive_read_finish(a);
744 archive_write_finish(ext);
745 exit(0);
746 }
747
748 static int
749 copy_data(struct archive *ar, struct archive *aw)
750 {
751 int r;
752 size_t size;
753 const void *block;
754 off_t offset;
755
756 for (;;) {
757 r = archive_read_data_block(ar, &block, &size, &offset);
758 if (r == ARCHIVE_EOF)
759 return (ARCHIVE_OK);
760 if (r != ARCHIVE_OK) {
761 cpio_warnc(archive_errno(ar),
762 "%s", archive_error_string(ar));
763 return (r);
764 }
765 r = archive_write_data_block(aw, block, size, offset);
766 if (r != ARCHIVE_OK) {
767 cpio_warnc(archive_errno(aw),
768 archive_error_string(aw));
769 return (r);
770 }
771 }
772 }
773
774 static void
775 mode_list(struct cpio *cpio)
776 {
777 struct archive *a;
778 struct archive_entry *entry;
779 unsigned long blocks;
780 int r;
781
782 a = archive_read_new();
783 if (a == NULL)
784 cpio_errc(1, 0, "Couldn't allocate archive object");
785 archive_read_support_compression_all(a);
786 archive_read_support_format_all(a);
787
788 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
789 cpio_errc(1, archive_errno(a),
790 archive_error_string(a));
791 for (;;) {
792 r = archive_read_next_header(a, &entry);
793 if (r == ARCHIVE_EOF)
794 break;
795 if (r != ARCHIVE_OK) {
796 cpio_errc(1, archive_errno(a),
797 archive_error_string(a));
798 }
799 if (excluded(cpio, archive_entry_pathname(entry)))
800 continue;
801 if (cpio->verbose) {
802 /* TODO: uname/gname lookups */
803 /* TODO: Clean this up. */
804 fprintf(stdout,
805 "%s%3d %8s%8s " CPIO_FILESIZE_PRINTF " %s\n",
806 archive_entry_strmode(entry),
807 archive_entry_nlink(entry),
808 archive_entry_uname(entry),
809 archive_entry_gname(entry),
810 (CPIO_FILESIZE_TYPE)archive_entry_size(entry),
811 archive_entry_pathname(entry));
812 } else
813 fprintf(stdout, "%s\n", archive_entry_pathname(entry));
814 }
815 r = archive_read_close(a);
816 if (r != ARCHIVE_OK)
817 cpio_errc(1, 0, archive_error_string(a));
818 if (!cpio->quiet) {
819 blocks = (archive_position_uncompressed(a) + 511)
820 / 512;
821 fprintf(stderr, "%lu %s\n", blocks,
822 blocks == 1 ? "block" : "blocks");
823 }
824 archive_read_finish(a);
825 exit(0);
826 }
827
828 static void
829 mode_pass(struct cpio *cpio, const char *destdir)
830 {
831 struct line_reader *lr;
832 const char *p;
833 int r;
834
835 /* Ensure target dir has a trailing '/' to simplify path surgery. */
836 cpio->destdir = malloc(strlen(destdir) + 8);
837 strcpy(cpio->destdir, destdir);
838 if (destdir[strlen(destdir) - 1] != '/')
839 strcat(cpio->destdir, "/");
840
841 cpio->archive = archive_write_disk_new();
842 if (cpio->archive == NULL)
843 cpio_errc(1, 0, "Failed to allocate archive object");
844 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags);
845 if (r != ARCHIVE_OK)
846 cpio_errc(1, 0, archive_error_string(cpio->archive));
847 cpio->linkresolver = archive_entry_linkresolver_new();
848 archive_write_disk_set_standard_lookup(cpio->archive);
849 lr = process_lines_init("-", cpio->line_separator);
850 while ((p = process_lines_next(lr)) != NULL)
851 file_to_archive(cpio, p);
852 process_lines_free(lr);
853
854 archive_entry_linkresolver_free(cpio->linkresolver);
855 r = archive_write_close(cpio->archive);
856 if (r != ARCHIVE_OK)
857 cpio_errc(1, 0, archive_error_string(cpio->archive));
858 archive_write_finish(cpio->archive);
859 }
860
861 /*
862 * Prompt for a new name for this entry. Returns a pointer to the
863 * new name or NULL if the entry should not be copied. This
864 * implements the semantics defined in POSIX.1-1996, which specifies
865 * that an input of '.' means the name should be unchanged. GNU cpio
866 * treats '.' as a literal new name.
867 */
868 static const char *
869 cpio_rename(const char *name)
870 {
871 static char buff[1024];
872 FILE *t;
873 char *p, *ret;
874
875 t = fopen("/dev/tty", "r+");
876 if (t == NULL)
877 return (name);
878 fprintf(t, "%s (Enter/./(new name))? ", name);
879 fflush(t);
880
881 p = fgets(buff, sizeof(buff), t);
882 fclose(t);
883 if (p == NULL)
884 /* End-of-file is a blank line. */
885 return (NULL);
886
887 while (*p == ' ' || *p == '\t')
888 ++p;
889 if (*p == '\n' || *p == '\0')
890 /* Empty line. */
891 return (NULL);
892 if (*p == '.' && p[1] == '\n')
893 /* Single period preserves original name. */
894 return (name);
895 ret = p;
896 /* Trim the final newline. */
897 while (*p != '\0' && *p != '\n')
898 ++p;
899 /* Overwrite the final \n with a null character. */
900 *p = '\0';
901 return (ret);
902 }
903
904
905 /*
906 * Read lines from file and do something with each one. If option_null
907 * is set, lines are terminated with zero bytes; otherwise, they're
908 * terminated with newlines.
909 *
910 * This uses a self-sizing buffer to handle arbitrarily-long lines.
911 */
912 struct line_reader {
913 FILE *f;
914 char *buff, *buff_end, *line_start, *line_end, *p;
915 char *pathname;
916 size_t buff_length;
917 int separator;
918 int ret;
919 };
920
921 struct line_reader *
922 process_lines_init(const char *pathname, char separator)
923 {
924 struct line_reader *lr;
925
926 lr = calloc(1, sizeof(*lr));
927 if (lr == NULL)
928 cpio_errc(1, ENOMEM, "Can't open %s", pathname);
929
930 lr->separator = separator;
931 lr->pathname = strdup(pathname);
932
933 if (strcmp(pathname, "-") == 0)
934 lr->f = stdin;
935 else
936 lr->f = fopen(pathname, "r");
937 if (lr->f == NULL)
938 cpio_errc(1, errno, "Couldn't open %s", pathname);
939 lr->buff_length = 8192;
940 lr->buff = malloc(lr->buff_length);
941 if (lr->buff == NULL)
942 cpio_errc(1, ENOMEM, "Can't read %s", pathname);
943 lr->line_start = lr->line_end = lr->buff_end = lr->buff;
944
945 return (lr);
946 }
947
948 const char *
949 process_lines_next(struct line_reader *lr)
950 {
951 size_t bytes_wanted, bytes_read, new_buff_size;
952 char *line_start, *p;
953
954 for (;;) {
955 /* If there's a line in the buffer, return it immediately. */
956 while (lr->line_end < lr->buff_end) {
957 if (*lr->line_end == lr->separator) {
958 *lr->line_end = '\0';
959 line_start = lr->line_start;
960 lr->line_start = lr->line_end + 1;
961 lr->line_end = lr->line_start;
962 return (line_start);
963 } else
964 lr->line_end++;
965 }
966
967 /* If we're at end-of-file, process the final data. */
968 if (lr->f == NULL) {
969 /* If there's more text, return one last line. */
970 if (lr->line_end > lr->line_start) {
971 *lr->line_end = '\0';
972 line_start = lr->line_start;
973 lr->line_start = lr->line_end + 1;
974 lr->line_end = lr->line_start;
975 return (line_start);
976 }
977 /* Otherwise, we're done. */
978 return (NULL);
979 }
980
981 /* Buffer only has part of a line. */
982 if (lr->line_start > lr->buff) {
983 /* Move a leftover fractional line to the beginning. */
984 memmove(lr->buff, lr->line_start,
985 lr->buff_end - lr->line_start);
986 lr->buff_end -= lr->line_start - lr->buff;
987 lr->line_end -= lr->line_start - lr->buff;
988 lr->line_start = lr->buff;
989 } else {
990 /* Line is too big; enlarge the buffer. */
991 new_buff_size = lr->buff_length * 2;
992 if (new_buff_size <= lr->buff_length)
993 cpio_errc(1, ENOMEM,
994 "Line too long in %s", lr->pathname);
995 lr->buff_length = new_buff_size;
996 p = realloc(lr->buff, new_buff_size);
997 if (p == NULL)
998 cpio_errc(1, ENOMEM,
999 "Line too long in %s", lr->pathname);
1000 lr->buff_end = p + (lr->buff_end - lr->buff);
1001 lr->line_end = p + (lr->line_end - lr->buff);
1002 lr->line_start = lr->buff = p;
1003 }
1004
1005 /* Get some more data into the buffer. */
1006 bytes_wanted = lr->buff + lr->buff_length - lr->buff_end;
1007 bytes_read = fread(lr->buff_end, 1, bytes_wanted, lr->f);
1008 lr->buff_end += bytes_read;
1009
1010 if (ferror(lr->f))
1011 cpio_errc(1, errno, "Can't read %s", lr->pathname);
1012 if (feof(lr->f)) {
1013 if (lr->f != stdin)
1014 fclose(lr->f);
1015 lr->f = NULL;
1016 }
1017 }
1018 }
1019
1020 void
1021 process_lines_free(struct line_reader *lr)
1022 {
1023 free(lr->buff);
1024 free(lr->pathname);
1025 free(lr);
1026 }
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