2 * Copyright (c) 2003-2007 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
28 #include "cpio_platform.h"
29 __FBSDID("$FreeBSD: src/usr.bin/cpio/cpio.c,v 1.15 2008/12/06 07:30:40 kientzle Exp $");
31 #include <sys/types.h>
33 #include <archive_entry.h>
35 #ifdef HAVE_SYS_MKDEV_H
36 #include <sys/mkdev.h>
38 #ifdef HAVE_SYS_STAT_H
41 #ifdef HAVE_SYS_TIME_H
84 #include "line_reader.h"
87 /* Fixed size of uname/gname caches. */
88 #define name_cache_size 101
101 } cache[name_cache_size];
104 static int extract_data(struct archive *, struct archive *);
105 const char * cpio_i64toa(int64_t);
106 static const char *cpio_rename(const char *name);
107 static int entry_to_archive(struct cpio *, struct archive_entry *);
108 static int file_to_archive(struct cpio *, const char *);
109 static void free_cache(struct name_cache *cache);
110 static void list_item_verbose(struct cpio *, struct archive_entry *);
111 static void long_help(void);
112 static const char *lookup_gname(struct cpio *, gid_t gid);
113 static int lookup_gname_helper(struct cpio *,
114 const char **name, id_t gid);
115 static const char *lookup_uname(struct cpio *, uid_t uid);
116 static int lookup_uname_helper(struct cpio *,
117 const char **name, id_t uid);
118 static void mode_in(struct cpio *);
119 static void mode_list(struct cpio *);
120 static void mode_out(struct cpio *);
121 static void mode_pass(struct cpio *, const char *);
122 static int restore_time(struct cpio *, struct archive_entry *,
123 const char *, int fd);
124 static void usage(void);
125 static void version(void);
128 main(int argc, char *argv[])
130 static char buff[16384];
131 struct cpio _cpio; /* Allocated on stack. */
138 memset(cpio, 0, sizeof(*cpio));
140 cpio->buff_size = sizeof(buff);
142 #if defined(HAVE_SIGACTION) && defined(SIGPIPE)
143 { /* Ignore SIGPIPE signals. */
145 sigemptyset(&sa.sa_mask);
147 sa.sa_handler = SIG_IGN;
148 sigaction(SIGPIPE, &sa, NULL);
152 /* Need lafe_progname before calling lafe_warnc. */
154 lafe_progname = "bsdcpio";
156 #if defined(_WIN32) && !defined(__CYGWIN__)
157 lafe_progname = strrchr(*argv, '\\');
159 lafe_progname = strrchr(*argv, '/');
161 if (lafe_progname != NULL)
164 lafe_progname = *argv;
167 if (setlocale(LC_ALL, "") == NULL)
168 lafe_warnc(0, "Failed to set default locale");
171 cpio->uid_override = -1;
172 cpio->gid_override = -1;
177 cpio->compress = '\0';
178 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
179 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
180 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
181 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
182 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
183 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
184 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
185 #if !defined(_WIN32) && !defined(__CYGWIN__)
187 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
189 cpio->bytes_per_block = 512;
190 cpio->filename = NULL;
192 while ((opt = cpio_getopt(cpio)) != -1) {
194 case '0': /* GNU convention: --null, -0 */
195 cpio->option_null = 1;
197 case 'A': /* NetBSD/OpenBSD */
198 cpio->option_append = 1;
200 case 'a': /* POSIX 1997 */
201 cpio->option_atime_restore = 1;
203 case 'B': /* POSIX 1997 */
204 cpio->bytes_per_block = 5120;
206 case 'C': /* NetBSD/OpenBSD */
207 cpio->bytes_per_block = atoi(cpio->argument);
208 if (cpio->bytes_per_block <= 0)
209 lafe_errc(1, 0, "Invalid blocksize %s", cpio->argument);
211 case 'c': /* POSIX 1997 */
212 cpio->format = "odc";
214 case 'd': /* POSIX 1997 */
215 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
217 case 'E': /* NetBSD/OpenBSD */
218 lafe_include_from_file(&cpio->matching,
219 cpio->argument, cpio->option_null);
221 case 'F': /* NetBSD/OpenBSD/GNU cpio */
222 cpio->filename = cpio->argument;
224 case 'f': /* POSIX 1997 */
225 lafe_exclude(&cpio->matching, cpio->argument);
227 case 'H': /* GNU cpio (also --format) */
228 cpio->format = cpio->argument;
233 case 'I': /* NetBSD/OpenBSD */
234 cpio->filename = cpio->argument;
236 case 'i': /* POSIX 1997 */
237 if (cpio->mode != '\0')
239 "Cannot use both -i and -%c", cpio->mode);
242 case 'J': /* GNU tar, others */
243 cpio->compress = opt;
245 case 'j': /* GNU tar, others */
246 cpio->compress = opt;
248 case OPTION_INSECURE:
249 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
250 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
252 case 'L': /* GNU cpio */
253 cpio->option_follow_links = 1;
255 case 'l': /* POSIX 1997 */
256 cpio->option_link = 1;
258 case OPTION_LZMA: /* GNU tar, others */
259 cpio->compress = opt;
261 case 'm': /* POSIX 1997 */
262 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
264 case 'n': /* GNU cpio */
265 cpio->option_numeric_uid_gid = 1;
267 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
268 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
270 case 'O': /* GNU cpio */
271 cpio->filename = cpio->argument;
273 case 'o': /* POSIX 1997 */
274 if (cpio->mode != '\0')
276 "Cannot use both -o and -%c", cpio->mode);
279 case 'p': /* POSIX 1997 */
280 if (cpio->mode != '\0')
282 "Cannot use both -p and -%c", cpio->mode);
284 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
286 case OPTION_PRESERVE_OWNER:
287 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
289 case OPTION_QUIET: /* GNU cpio */
292 case 'R': /* GNU cpio, also --owner */
293 /* TODO: owner_parse should return uname/gname
294 * also; use that to set [ug]name_override. */
295 errmsg = owner_parse(cpio->argument, &uid, &gid);
297 lafe_warnc(-1, "%s", errmsg);
301 cpio->uid_override = uid;
302 cpio->uname_override = NULL;
305 cpio->gid_override = gid;
306 cpio->gname_override = NULL;
309 case 'r': /* POSIX 1997 */
310 cpio->option_rename = 1;
312 case 't': /* POSIX 1997 */
313 cpio->option_list = 1;
315 case 'u': /* POSIX 1997 */
317 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
319 case 'v': /* POSIX 1997 */
322 case 'V': /* GNU cpio */
325 case OPTION_VERSION: /* GNU convention */
330 * cpio_getopt() handles -W specially, so it's not
333 case 'W': /* Obscure, but useful GNU convention. */
336 case 'y': /* tar convention */
337 cpio->compress = opt;
339 case 'Z': /* tar convention */
340 cpio->compress = opt;
342 case 'z': /* tar convention */
343 cpio->compress = opt;
351 * Sanity-check args, error out on nonsensical combinations.
353 /* -t implies -i if no mode was specified. */
354 if (cpio->option_list && cpio->mode == '\0')
357 if (cpio->option_list && cpio->mode != 'i')
358 lafe_errc(1, 0, "Option -t requires -i");
359 /* -n requires -it */
360 if (cpio->option_numeric_uid_gid && !cpio->option_list)
361 lafe_errc(1, 0, "Option -n requires -it");
362 /* Can only specify format when writing */
363 if (cpio->format != NULL && cpio->mode != 'o')
364 lafe_errc(1, 0, "Option --format requires -o");
366 if (cpio->option_link && cpio->mode != 'p')
367 lafe_errc(1, 0, "Option -l requires -p");
368 /* -v overrides -V */
369 if (cpio->dot && cpio->verbose)
371 /* -v overrides -V */
372 if (cpio->dot && cpio->verbose)
374 /* TODO: Flag other nonsensical combinations. */
376 switch (cpio->mode) {
378 /* TODO: Implement old binary format in libarchive,
380 if (cpio->format == NULL)
381 cpio->format = "odc"; /* Default format */
386 while (*cpio->argv != NULL) {
387 lafe_include(&cpio->matching, *cpio->argv);
391 if (cpio->option_list)
397 if (*cpio->argv == NULL || **cpio->argv == '\0')
399 "-p mode requires a target directory");
400 mode_pass(cpio, *cpio->argv);
404 "Must specify at least one of -i, -o, or -p");
407 free_cache(cpio->gname_cache);
408 free_cache(cpio->uname_cache);
409 return (cpio->return_value);
419 fprintf(stderr, "Brief Usage:\n");
420 fprintf(stderr, " List: %s -it < archive\n", p);
421 fprintf(stderr, " Extract: %s -i < archive\n", p);
422 fprintf(stderr, " Create: %s -o < filenames > archive\n", p);
423 fprintf(stderr, " Help: %s --help\n", p);
427 static const char *long_help_msg =
428 "First option must be a mode specifier:\n"
429 " -i Input -o Output -p Pass\n"
431 " -v Verbose filenames -V one dot per file\n"
432 "Create: %p -o [options] < [list of files] > [archive]\n"
433 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n"
434 " --format {odc|newc|ustar} Select archive format\n"
435 "List: %p -it < [archive]\n"
436 "Extract: %p -i [options] < [archive]\n";
440 * Note that the word 'bsdcpio' will always appear in the first line
443 * In particular, /bin/sh scripts that need to test for the presence
444 * of bsdcpio can use the following template:
446 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \
447 * echo bsdcpio; else echo not bsdcpio; fi
455 prog = lafe_progname;
459 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";
460 printf("%s%s: manipulate archive files\n", prog, p);
462 for (p = long_help_msg; *p != '\0'; p++) {
478 fprintf(stdout,"bsdcpio %s -- %s\n",
479 BSDCPIO_VERSION_STRING,
480 archive_version_string());
485 mode_out(struct cpio *cpio)
487 struct archive_entry *entry, *spare;
488 struct lafe_line_reader *lr;
492 if (cpio->option_append)
493 lafe_errc(1, 0, "Append mode not yet supported.");
495 cpio->archive_read_disk = archive_read_disk_new();
496 if (cpio->archive_read_disk == NULL)
497 lafe_errc(1, 0, "Failed to allocate archive object");
498 if (cpio->option_follow_links)
499 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
501 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
502 archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
504 cpio->archive = archive_write_new();
505 if (cpio->archive == NULL)
506 lafe_errc(1, 0, "Failed to allocate archive object");
507 switch (cpio->compress) {
509 r = archive_write_set_compression_xz(cpio->archive);
512 r = archive_write_set_compression_lzma(cpio->archive);
515 r = archive_write_set_compression_bzip2(cpio->archive);
518 r = archive_write_set_compression_gzip(cpio->archive);
521 r = archive_write_set_compression_compress(cpio->archive);
524 r = archive_write_set_compression_none(cpio->archive);
527 if (r < ARCHIVE_WARN)
528 lafe_errc(1, 0, "Requested compression not available");
529 r = archive_write_set_format_by_name(cpio->archive, cpio->format);
531 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
532 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block);
533 cpio->linkresolver = archive_entry_linkresolver_new();
534 archive_entry_linkresolver_set_strategy(cpio->linkresolver,
535 archive_format(cpio->archive));
538 * The main loop: Copy each file into the output archive.
540 r = archive_write_open_file(cpio->archive, cpio->filename);
542 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
543 lr = lafe_line_reader("-", cpio->option_null);
544 while ((p = lafe_line_reader_next(lr)) != NULL)
545 file_to_archive(cpio, p);
546 lafe_line_reader_free(lr);
549 * The hardlink detection may have queued up a couple of entries
550 * that can now be flushed.
553 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
554 while (entry != NULL) {
555 entry_to_archive(cpio, entry);
556 archive_entry_free(entry);
558 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
561 r = archive_write_close(cpio->archive);
563 fprintf(stderr, "\n");
565 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
569 (archive_position_uncompressed(cpio->archive) + 511)
571 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
572 blocks == 1 ? "block" : "blocks");
574 archive_write_free(cpio->archive);
578 * This is used by both out mode (to copy objects from disk into
579 * an archive) and pass mode (to copy objects from disk to
580 * an archive_write_disk "archive").
583 file_to_archive(struct cpio *cpio, const char *srcpath)
585 const char *destpath;
586 struct archive_entry *entry, *spare;
592 * Create an archive_entry describing the source file.
595 entry = archive_entry_new();
597 lafe_errc(1, 0, "Couldn't allocate entry");
598 archive_entry_copy_sourcepath(entry, srcpath);
599 r = archive_read_disk_entry_from_file(cpio->archive_read_disk,
601 if (r < ARCHIVE_FAILED)
602 lafe_errc(1, 0, "%s",
603 archive_error_string(cpio->archive_read_disk));
606 archive_error_string(cpio->archive_read_disk));
607 if (r <= ARCHIVE_FAILED) {
608 cpio->return_value = 1;
612 if (cpio->uid_override >= 0) {
613 archive_entry_set_uid(entry, cpio->uid_override);
614 archive_entry_set_uname(entry, cpio->uname_override);
616 if (cpio->gid_override >= 0) {
617 archive_entry_set_gid(entry, cpio->gid_override);
618 archive_entry_set_gname(entry, cpio->gname_override);
622 * Generate a destination path for this entry.
623 * "destination path" is the name to which it will be copied in
624 * pass mode or the name that will go into the archive in
629 len = strlen(cpio->destdir) + strlen(srcpath) + 8;
630 if (len >= cpio->pass_destpath_alloc) {
631 while (len >= cpio->pass_destpath_alloc) {
632 cpio->pass_destpath_alloc += 512;
633 cpio->pass_destpath_alloc *= 2;
635 free(cpio->pass_destpath);
636 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);
637 if (cpio->pass_destpath == NULL)
639 "Can't allocate path buffer");
641 strcpy(cpio->pass_destpath, cpio->destdir);
645 strcat(cpio->pass_destpath, p);
646 destpath = cpio->pass_destpath;
648 if (cpio->option_rename)
649 destpath = cpio_rename(destpath);
650 if (destpath == NULL)
652 archive_entry_copy_pathname(entry, destpath);
655 * If we're trying to preserve hardlinks, match them here.
658 if (cpio->linkresolver != NULL
659 && archive_entry_filetype(entry) != AE_IFDIR) {
660 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
664 r = entry_to_archive(cpio, entry);
665 archive_entry_free(entry);
668 r = entry_to_archive(cpio, spare);
669 archive_entry_free(spare);
676 entry_to_archive(struct cpio *cpio, struct archive_entry *entry)
678 const char *destpath = archive_entry_pathname(entry);
679 const char *srcpath = archive_entry_sourcepath(entry);
684 /* Print out the destination name to the user. */
686 fprintf(stderr,"%s", destpath);
688 fprintf(stderr, ".");
691 * Option_link only makes sense in pass mode and for
692 * regular files. Also note: if a link operation fails
693 * because of cross-device restrictions, we'll fall back
694 * to copy mode for that entry.
696 * TODO: Test other cpio implementations to see if they
697 * hard-link anything other than regular files here.
699 if (cpio->option_link
700 && archive_entry_filetype(entry) == AE_IFREG)
702 struct archive_entry *t;
703 /* Save the original entry in case we need it later. */
704 t = archive_entry_clone(entry);
706 lafe_errc(1, ENOMEM, "Can't create link");
707 /* Note: link(2) doesn't create parent directories,
708 * so we use archive_write_header() instead as a
710 archive_entry_set_hardlink(t, srcpath);
711 /* This is a straight link that carries no data. */
712 archive_entry_set_size(t, 0);
713 r = archive_write_header(cpio->archive, t);
714 archive_entry_free(t);
716 lafe_warnc(archive_errno(cpio->archive),
717 "%s", archive_error_string(cpio->archive));
718 if (r == ARCHIVE_FATAL)
721 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {
722 /* Cross-device link: Just fall through and use
723 * the original entry to copy the file over. */
724 lafe_warnc(0, "Copying file instead");
731 * Make sure we can open the file (if necessary) before
732 * trying to write the header.
734 if (archive_entry_filetype(entry) == AE_IFREG) {
735 if (archive_entry_size(entry) > 0) {
736 fd = open(srcpath, O_RDONLY | O_BINARY);
739 "%s: could not open file", srcpath);
744 archive_entry_set_size(entry, 0);
747 r = archive_write_header(cpio->archive, entry);
750 lafe_warnc(archive_errno(cpio->archive),
753 archive_error_string(cpio->archive));
755 if (r == ARCHIVE_FATAL)
758 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) {
759 bytes_read = read(fd, cpio->buff, cpio->buff_size);
760 while (bytes_read > 0) {
761 r = archive_write_data(cpio->archive,
762 cpio->buff, bytes_read);
764 lafe_errc(1, archive_errno(cpio->archive),
765 "%s", archive_error_string(cpio->archive));
766 if (r < bytes_read) {
768 "Truncated write; file may have grown while being archived.");
770 bytes_read = read(fd, cpio->buff, cpio->buff_size);
774 fd = restore_time(cpio, entry, srcpath, fd);
778 fprintf(stderr,"\n");
785 restore_time(struct cpio *cpio, struct archive_entry *entry,
786 const char *name, int fd)
789 static int warned = 0;
791 (void)cpio; /* UNUSED */
792 (void)entry; /* UNUSED */
793 (void)name; /* UNUSED */
796 lafe_warnc(0, "Can't restore access times on this platform");
800 #if defined(_WIN32) && !defined(__CYGWIN__)
801 struct __timeval times[2];
803 struct timeval times[2];
806 if (!cpio->option_atime_restore)
809 times[1].tv_sec = archive_entry_mtime(entry);
810 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
812 times[0].tv_sec = archive_entry_atime(entry);
813 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
815 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
816 if (fd >= 0 && futimes(fd, times) == 0)
820 * Some platform cannot restore access times if the file descriptor
829 if (lutimes(name, times) != 0)
831 if ((AE_IFLNK != archive_entry_filetype(entry))
832 && utimes(name, times) != 0)
834 lafe_warnc(errno, "Can't update time for %s", name);
841 mode_in(struct cpio *cpio)
844 struct archive_entry *entry;
846 const char *destpath;
849 ext = archive_write_disk_new();
851 lafe_errc(1, 0, "Couldn't allocate restore object");
852 r = archive_write_disk_set_options(ext, cpio->extract_flags);
854 lafe_errc(1, 0, "%s", archive_error_string(ext));
855 a = archive_read_new();
857 lafe_errc(1, 0, "Couldn't allocate archive object");
858 archive_read_support_filter_all(a);
859 archive_read_support_format_all(a);
861 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
862 lafe_errc(1, archive_errno(a),
863 "%s", archive_error_string(a));
865 r = archive_read_next_header(a, &entry);
866 if (r == ARCHIVE_EOF)
868 if (r != ARCHIVE_OK) {
869 lafe_errc(1, archive_errno(a),
870 "%s", archive_error_string(a));
872 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry)))
874 if (cpio->option_rename) {
875 destpath = cpio_rename(archive_entry_pathname(entry));
876 archive_entry_set_pathname(entry, destpath);
878 destpath = archive_entry_pathname(entry);
879 if (destpath == NULL)
882 fprintf(stderr, "%s\n", destpath);
884 fprintf(stderr, ".");
885 if (cpio->uid_override >= 0)
886 archive_entry_set_uid(entry, cpio->uid_override);
887 if (cpio->gid_override >= 0)
888 archive_entry_set_gid(entry, cpio->gid_override);
889 r = archive_write_header(ext, entry);
890 if (r != ARCHIVE_OK) {
891 fprintf(stderr, "%s: %s\n",
892 archive_entry_pathname(entry),
893 archive_error_string(ext));
894 } else if (archive_entry_size(entry) > 0) {
895 r = extract_data(a, ext);
897 cpio->return_value = 1;
900 r = archive_read_close(a);
902 fprintf(stderr, "\n");
904 lafe_errc(1, 0, "%s", archive_error_string(a));
905 r = archive_write_close(ext);
907 lafe_errc(1, 0, "%s", archive_error_string(ext));
909 int64_t blocks = (archive_position_uncompressed(a) + 511)
911 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
912 blocks == 1 ? "block" : "blocks");
914 archive_read_free(a);
915 archive_write_free(ext);
916 exit(cpio->return_value);
920 * Exits if there's a fatal error. Returns ARCHIVE_OK
921 * if everything is kosher.
924 extract_data(struct archive *ar, struct archive *aw)
932 r = archive_read_data_block(ar, &block, &size, &offset);
933 if (r == ARCHIVE_EOF)
935 if (r != ARCHIVE_OK) {
936 lafe_warnc(archive_errno(ar),
937 "%s", archive_error_string(ar));
940 r = archive_write_data_block(aw, block, size, offset);
941 if (r != ARCHIVE_OK) {
942 lafe_warnc(archive_errno(aw),
943 "%s", archive_error_string(aw));
950 mode_list(struct cpio *cpio)
953 struct archive_entry *entry;
956 a = archive_read_new();
958 lafe_errc(1, 0, "Couldn't allocate archive object");
959 archive_read_support_filter_all(a);
960 archive_read_support_format_all(a);
962 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
963 lafe_errc(1, archive_errno(a),
964 "%s", archive_error_string(a));
966 r = archive_read_next_header(a, &entry);
967 if (r == ARCHIVE_EOF)
969 if (r != ARCHIVE_OK) {
970 lafe_errc(1, archive_errno(a),
971 "%s", archive_error_string(a));
973 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry)))
976 list_item_verbose(cpio, entry);
978 fprintf(stdout, "%s\n", archive_entry_pathname(entry));
980 r = archive_read_close(a);
982 lafe_errc(1, 0, "%s", archive_error_string(a));
984 int64_t blocks = (archive_position_uncompressed(a) + 511)
986 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
987 blocks == 1 ? "block" : "blocks");
989 archive_read_free(a);
994 * Display information about the current file.
996 * The format here roughly duplicates the output of 'ls -l'.
997 * This is based on SUSv2, where 'tar tv' is documented as
998 * listing additional information in an "unspecified format,"
999 * and 'pax -l' is documented as using the same format as 'ls -l'.
1002 list_item_verbose(struct cpio *cpio, struct archive_entry *entry)
1006 char uids[16], gids[16];
1007 const char *uname, *gname;
1016 if (cpio->option_numeric_uid_gid) {
1017 /* Format numeric uid/gid for display. */
1018 strcpy(uids, cpio_i64toa(archive_entry_uid(entry)));
1020 strcpy(gids, cpio_i64toa(archive_entry_gid(entry)));
1023 /* Use uname if it's present, else lookup name from uid. */
1024 uname = archive_entry_uname(entry);
1026 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry));
1027 /* Use gname if it's present, else lookup name from gid. */
1028 gname = archive_entry_gname(entry);
1030 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry));
1033 /* Print device number or file size. */
1034 if (archive_entry_filetype(entry) == AE_IFCHR
1035 || archive_entry_filetype(entry) == AE_IFBLK) {
1036 snprintf(size, sizeof(size), "%lu,%lu",
1037 (unsigned long)archive_entry_rdevmajor(entry),
1038 (unsigned long)archive_entry_rdevminor(entry));
1040 strcpy(size, cpio_i64toa(archive_entry_size(entry)));
1043 /* Format the time using 'ls -l' conventions. */
1044 mtime = archive_entry_mtime(entry);
1045 #if defined(_WIN32) && !defined(__CYGWIN__)
1046 /* Windows' strftime function does not support %e format. */
1047 if (mtime - now > 365*86400/2
1048 || mtime - now < -365*86400/2)
1049 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y";
1051 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M";
1053 if (abs(mtime - now) > (365/2)*86400)
1054 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y";
1056 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M";
1058 strftime(date, sizeof(date), fmt, localtime(&mtime));
1060 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s",
1061 archive_entry_strmode(entry),
1062 archive_entry_nlink(entry),
1063 uname, gname, size, date,
1064 archive_entry_pathname(entry));
1066 /* Extra information for links. */
1067 if (archive_entry_hardlink(entry)) /* Hard link */
1068 fprintf(out, " link to %s", archive_entry_hardlink(entry));
1069 else if (archive_entry_symlink(entry)) /* Symbolic link */
1070 fprintf(out, " -> %s", archive_entry_symlink(entry));
1075 mode_pass(struct cpio *cpio, const char *destdir)
1077 struct lafe_line_reader *lr;
1081 /* Ensure target dir has a trailing '/' to simplify path surgery. */
1082 cpio->destdir = malloc(strlen(destdir) + 8);
1083 strcpy(cpio->destdir, destdir);
1084 if (destdir[strlen(destdir) - 1] != '/')
1085 strcat(cpio->destdir, "/");
1087 cpio->archive = archive_write_disk_new();
1088 if (cpio->archive == NULL)
1089 lafe_errc(1, 0, "Failed to allocate archive object");
1090 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags);
1091 if (r != ARCHIVE_OK)
1092 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1093 cpio->linkresolver = archive_entry_linkresolver_new();
1094 archive_write_disk_set_standard_lookup(cpio->archive);
1096 cpio->archive_read_disk = archive_read_disk_new();
1097 if (cpio->archive_read_disk == NULL)
1098 lafe_errc(1, 0, "Failed to allocate archive object");
1099 if (cpio->option_follow_links)
1100 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
1102 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
1103 archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
1105 lr = lafe_line_reader("-", cpio->option_null);
1106 while ((p = lafe_line_reader_next(lr)) != NULL)
1107 file_to_archive(cpio, p);
1108 lafe_line_reader_free(lr);
1110 archive_entry_linkresolver_free(cpio->linkresolver);
1111 r = archive_write_close(cpio->archive);
1113 fprintf(stderr, "\n");
1114 if (r != ARCHIVE_OK)
1115 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1119 (archive_position_uncompressed(cpio->archive) + 511)
1121 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
1122 blocks == 1 ? "block" : "blocks");
1125 archive_write_free(cpio->archive);
1129 * Prompt for a new name for this entry. Returns a pointer to the
1130 * new name or NULL if the entry should not be copied. This
1131 * implements the semantics defined in POSIX.1-1996, which specifies
1132 * that an input of '.' means the name should be unchanged. GNU cpio
1133 * treats '.' as a literal new name.
1136 cpio_rename(const char *name)
1138 static char buff[1024];
1142 t = fopen("/dev/tty", "r+");
1145 fprintf(t, "%s (Enter/./(new name))? ", name);
1148 p = fgets(buff, sizeof(buff), t);
1151 /* End-of-file is a blank line. */
1154 while (*p == ' ' || *p == '\t')
1156 if (*p == '\n' || *p == '\0')
1159 if (*p == '.' && p[1] == '\n')
1160 /* Single period preserves original name. */
1163 /* Trim the final newline. */
1164 while (*p != '\0' && *p != '\n')
1166 /* Overwrite the final \n with a null character. */
1172 free_cache(struct name_cache *cache)
1176 if (cache != NULL) {
1177 for (i = 0; i < cache->size; i++)
1178 free(cache->cache[i].name);
1184 * Lookup uname/gname from uid/gid, return NULL if no match.
1187 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable,
1188 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id)
1191 struct name_cache *cache;
1196 if (*name_cache_variable == NULL) {
1197 *name_cache_variable = malloc(sizeof(struct name_cache));
1198 if (*name_cache_variable == NULL)
1199 lafe_errc(1, ENOMEM, "No more memory");
1200 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1201 (*name_cache_variable)->size = name_cache_size;
1204 cache = *name_cache_variable;
1207 slot = id % cache->size;
1208 if (cache->cache[slot].name != NULL) {
1209 if (cache->cache[slot].id == id) {
1211 return (cache->cache[slot].name);
1213 free(cache->cache[slot].name);
1214 cache->cache[slot].name = NULL;
1217 if (lookup_fn(cpio, &name, id) == 0) {
1218 if (name == NULL || name[0] == '\0') {
1219 /* If lookup failed, format it as a number. */
1220 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id);
1223 cache->cache[slot].name = strdup(name);
1224 if (cache->cache[slot].name != NULL) {
1225 cache->cache[slot].id = id;
1226 return (cache->cache[slot].name);
1229 * Conveniently, NULL marks an empty slot, so
1230 * if the strdup() fails, we've just failed to
1231 * cache it. No recovery necessary.
1238 lookup_uname(struct cpio *cpio, uid_t uid)
1240 return (lookup_name(cpio, &cpio->uname_cache,
1241 &lookup_uname_helper, (id_t)uid));
1245 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id)
1247 struct passwd *pwent;
1249 (void)cpio; /* UNUSED */
1252 pwent = getpwuid((uid_t)id);
1253 if (pwent == NULL) {
1255 if (errno != 0 && errno != ENOENT)
1256 lafe_warnc(errno, "getpwuid(%d) failed", id);
1260 *name = pwent->pw_name;
1265 lookup_gname(struct cpio *cpio, gid_t gid)
1267 return (lookup_name(cpio, &cpio->gname_cache,
1268 &lookup_gname_helper, (id_t)gid));
1272 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id)
1274 struct group *grent;
1276 (void)cpio; /* UNUSED */
1279 grent = getgrgid((gid_t)id);
1280 if (grent == NULL) {
1283 lafe_warnc(errno, "getgrgid(%d) failed", id);
1287 *name = grent->gr_name;
1292 * It would be nice to just use printf() for formatting large numbers,
1293 * but the compatibility problems are a big headache. Hence the
1294 * following simple utility function.
1297 cpio_i64toa(int64_t n0)
1299 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice.
1300 * We also need 1 byte for '-' and 1 for '\0'.
1302 static char buff[22];
1303 int64_t n = n0 < 0 ? -n0 : n0;
1304 char *p = buff + sizeof(buff);
1308 *--p = '0' + (int)(n % 10);