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
72 #ifdef HAVE_SYS_TIME_H
81 #include "line_reader.h"
84 /* Fixed size of uname/gname caches. */
85 #define name_cache_size 101
98 } cache[name_cache_size];
101 static int extract_data(struct archive *, struct archive *);
102 const char * cpio_i64toa(int64_t);
103 static const char *cpio_rename(const char *name);
104 static int entry_to_archive(struct cpio *, struct archive_entry *);
105 static int file_to_archive(struct cpio *, const char *);
106 static void free_cache(struct name_cache *cache);
107 static void list_item_verbose(struct cpio *, struct archive_entry *);
108 static void long_help(void);
109 static const char *lookup_gname(struct cpio *, gid_t gid);
110 static int lookup_gname_helper(struct cpio *,
111 const char **name, id_t gid);
112 static const char *lookup_uname(struct cpio *, uid_t uid);
113 static int lookup_uname_helper(struct cpio *,
114 const char **name, id_t uid);
115 static void mode_in(struct cpio *);
116 static void mode_list(struct cpio *);
117 static void mode_out(struct cpio *);
118 static void mode_pass(struct cpio *, const char *);
119 static int restore_time(struct cpio *, struct archive_entry *,
120 const char *, int fd);
121 static void usage(void);
122 static void version(void);
125 main(int argc, char *argv[])
127 static char buff[16384];
128 struct cpio _cpio; /* Allocated on stack. */
135 memset(cpio, 0, sizeof(*cpio));
137 cpio->buff_size = sizeof(buff);
139 /* Need lafe_progname before calling lafe_warnc. */
141 lafe_progname = "bsdcpio";
143 #if defined(_WIN32) && !defined(__CYGWIN__)
144 lafe_progname = strrchr(*argv, '\\');
146 lafe_progname = strrchr(*argv, '/');
148 if (lafe_progname != NULL)
151 lafe_progname = *argv;
154 cpio->uid_override = -1;
155 cpio->gid_override = -1;
160 cpio->compress = '\0';
161 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
162 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
163 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
164 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
165 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
166 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
167 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
168 #if !defined(_WIN32) && !defined(__CYGWIN__)
170 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
172 cpio->bytes_per_block = 512;
173 cpio->filename = NULL;
175 while ((opt = cpio_getopt(cpio)) != -1) {
177 case '0': /* GNU convention: --null, -0 */
178 cpio->option_null = 1;
180 case 'A': /* NetBSD/OpenBSD */
181 cpio->option_append = 1;
183 case 'a': /* POSIX 1997 */
184 cpio->option_atime_restore = 1;
186 case 'B': /* POSIX 1997 */
187 cpio->bytes_per_block = 5120;
189 case 'C': /* NetBSD/OpenBSD */
190 cpio->bytes_per_block = atoi(cpio->optarg);
191 if (cpio->bytes_per_block <= 0)
192 lafe_errc(1, 0, "Invalid blocksize %s", cpio->optarg);
194 case 'c': /* POSIX 1997 */
195 cpio->format = "odc";
197 case 'd': /* POSIX 1997 */
198 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
200 case 'E': /* NetBSD/OpenBSD */
201 lafe_include_from_file(&cpio->matching,
202 cpio->optarg, cpio->option_null);
204 case 'F': /* NetBSD/OpenBSD/GNU cpio */
205 cpio->filename = cpio->optarg;
207 case 'f': /* POSIX 1997 */
208 lafe_exclude(&cpio->matching, cpio->optarg);
210 case 'H': /* GNU cpio (also --format) */
211 cpio->format = cpio->optarg;
216 case 'I': /* NetBSD/OpenBSD */
217 cpio->filename = cpio->optarg;
219 case 'i': /* POSIX 1997 */
220 if (cpio->mode != '\0')
222 "Cannot use both -i and -%c", cpio->mode);
225 case 'J': /* GNU tar, others */
226 cpio->compress = opt;
228 case 'j': /* GNU tar, others */
229 cpio->compress = opt;
231 case OPTION_INSECURE:
232 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
233 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
235 case 'L': /* GNU cpio */
236 cpio->option_follow_links = 1;
238 case 'l': /* POSIX 1997 */
239 cpio->option_link = 1;
241 case OPTION_LZMA: /* GNU tar, others */
242 cpio->compress = opt;
244 case 'm': /* POSIX 1997 */
245 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
247 case 'n': /* GNU cpio */
248 cpio->option_numeric_uid_gid = 1;
250 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
251 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
253 case 'O': /* GNU cpio */
254 cpio->filename = cpio->optarg;
256 case 'o': /* POSIX 1997 */
257 if (cpio->mode != '\0')
259 "Cannot use both -o and -%c", cpio->mode);
262 case 'p': /* POSIX 1997 */
263 if (cpio->mode != '\0')
265 "Cannot use both -p and -%c", cpio->mode);
267 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
269 case OPTION_PRESERVE_OWNER:
270 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
272 case OPTION_QUIET: /* GNU cpio */
275 case 'R': /* GNU cpio, also --owner */
276 errmsg = owner_parse(cpio->optarg, &uid, &gid);
278 lafe_warnc(-1, "%s", errmsg);
282 cpio->uid_override = uid;
284 cpio->gid_override = gid;
286 case 'r': /* POSIX 1997 */
287 cpio->option_rename = 1;
289 case 't': /* POSIX 1997 */
290 cpio->option_list = 1;
292 case 'u': /* POSIX 1997 */
294 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
296 case 'v': /* POSIX 1997 */
299 case OPTION_VERSION: /* GNU convention */
304 * cpio_getopt() handles -W specially, so it's not
307 case 'W': /* Obscure, but useful GNU convention. */
310 case 'y': /* tar convention */
311 cpio->compress = opt;
313 case 'Z': /* tar convention */
314 cpio->compress = opt;
316 case 'z': /* tar convention */
317 cpio->compress = opt;
325 * Sanity-check args, error out on nonsensical combinations.
327 /* -t implies -i if no mode was specified. */
328 if (cpio->option_list && cpio->mode == '\0')
331 if (cpio->option_list && cpio->mode != 'i')
332 lafe_errc(1, 0, "Option -t requires -i");
333 /* -n requires -it */
334 if (cpio->option_numeric_uid_gid && !cpio->option_list)
335 lafe_errc(1, 0, "Option -n requires -it");
336 /* Can only specify format when writing */
337 if (cpio->format != NULL && cpio->mode != 'o')
338 lafe_errc(1, 0, "Option --format requires -o");
340 if (cpio->option_link && cpio->mode != 'p')
341 lafe_errc(1, 0, "Option -l requires -p");
342 /* TODO: Flag other nonsensical combinations. */
344 switch (cpio->mode) {
346 /* TODO: Implement old binary format in libarchive,
348 if (cpio->format == NULL)
349 cpio->format = "odc"; /* Default format */
354 while (*cpio->argv != NULL) {
355 lafe_include(&cpio->matching, *cpio->argv);
359 if (cpio->option_list)
365 if (*cpio->argv == NULL || **cpio->argv == '\0')
367 "-p mode requires a target directory");
368 mode_pass(cpio, *cpio->argv);
372 "Must specify at least one of -i, -o, or -p");
375 free_cache(cpio->gname_cache);
376 free_cache(cpio->uname_cache);
377 return (cpio->return_value);
387 fprintf(stderr, "Brief Usage:\n");
388 fprintf(stderr, " List: %s -it < archive\n", p);
389 fprintf(stderr, " Extract: %s -i < archive\n", p);
390 fprintf(stderr, " Create: %s -o < filenames > archive\n", p);
391 fprintf(stderr, " Help: %s --help\n", p);
395 static const char *long_help_msg =
396 "First option must be a mode specifier:\n"
397 " -i Input -o Output -p Pass\n"
400 "Create: %p -o [options] < [list of files] > [archive]\n"
401 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n"
402 " --format {odc|newc|ustar} Select archive format\n"
403 "List: %p -it < [archive]\n"
404 "Extract: %p -i [options] < [archive]\n";
408 * Note that the word 'bsdcpio' will always appear in the first line
411 * In particular, /bin/sh scripts that need to test for the presence
412 * of bsdcpio can use the following template:
414 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \
415 * echo bsdcpio; else echo not bsdcpio; fi
423 prog = lafe_progname;
427 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";
428 printf("%s%s: manipulate archive files\n", prog, p);
430 for (p = long_help_msg; *p != '\0'; p++) {
446 fprintf(stdout,"bsdcpio %s -- %s\n",
447 BSDCPIO_VERSION_STRING,
453 mode_out(struct cpio *cpio)
455 struct archive_entry *entry, *spare;
456 struct lafe_line_reader *lr;
460 if (cpio->option_append)
461 lafe_errc(1, 0, "Append mode not yet supported.");
463 cpio->archive_read_disk = archive_read_disk_new();
464 if (cpio->archive_read_disk == NULL)
465 lafe_errc(1, 0, "Failed to allocate archive object");
466 if (cpio->option_follow_links)
467 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
469 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
470 archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
472 cpio->archive = archive_write_new();
473 if (cpio->archive == NULL)
474 lafe_errc(1, 0, "Failed to allocate archive object");
475 switch (cpio->compress) {
477 r = archive_write_set_compression_xz(cpio->archive);
480 r = archive_write_set_compression_lzma(cpio->archive);
483 r = archive_write_set_compression_bzip2(cpio->archive);
486 r = archive_write_set_compression_gzip(cpio->archive);
489 r = archive_write_set_compression_compress(cpio->archive);
492 r = archive_write_set_compression_none(cpio->archive);
495 if (r < ARCHIVE_WARN)
496 lafe_errc(1, 0, "Requested compression not available");
497 r = archive_write_set_format_by_name(cpio->archive, cpio->format);
499 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
500 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block);
501 cpio->linkresolver = archive_entry_linkresolver_new();
502 archive_entry_linkresolver_set_strategy(cpio->linkresolver,
503 archive_format(cpio->archive));
506 * The main loop: Copy each file into the output archive.
508 r = archive_write_open_file(cpio->archive, cpio->filename);
510 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
511 lr = lafe_line_reader("-", cpio->option_null);
512 while ((p = lafe_line_reader_next(lr)) != NULL)
513 file_to_archive(cpio, p);
514 lafe_line_reader_free(lr);
517 * The hardlink detection may have queued up a couple of entries
518 * that can now be flushed.
521 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
522 while (entry != NULL) {
523 entry_to_archive(cpio, entry);
524 archive_entry_free(entry);
526 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
529 r = archive_write_close(cpio->archive);
531 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
535 (archive_position_uncompressed(cpio->archive) + 511)
537 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
538 blocks == 1 ? "block" : "blocks");
540 archive_write_finish(cpio->archive);
544 * This is used by both out mode (to copy objects from disk into
545 * an archive) and pass mode (to copy objects from disk to
546 * an archive_write_disk "archive").
549 file_to_archive(struct cpio *cpio, const char *srcpath)
551 const char *destpath;
552 struct archive_entry *entry, *spare;
558 * Create an archive_entry describing the source file.
561 entry = archive_entry_new();
563 lafe_errc(1, 0, "Couldn't allocate entry");
564 archive_entry_copy_sourcepath(entry, srcpath);
565 r = archive_read_disk_entry_from_file(cpio->archive_read_disk,
567 if (r < ARCHIVE_FAILED)
568 lafe_errc(1, 0, "%s",
569 archive_error_string(cpio->archive_read_disk));
572 archive_error_string(cpio->archive_read_disk));
573 if (r <= ARCHIVE_FAILED) {
574 cpio->return_value = 1;
578 if (cpio->uid_override >= 0)
579 archive_entry_set_uid(entry, cpio->uid_override);
580 if (cpio->gid_override >= 0)
581 archive_entry_set_gid(entry, cpio->gid_override);
584 * Generate a destination path for this entry.
585 * "destination path" is the name to which it will be copied in
586 * pass mode or the name that will go into the archive in
591 len = strlen(cpio->destdir) + strlen(srcpath) + 8;
592 if (len >= cpio->pass_destpath_alloc) {
593 while (len >= cpio->pass_destpath_alloc) {
594 cpio->pass_destpath_alloc += 512;
595 cpio->pass_destpath_alloc *= 2;
597 free(cpio->pass_destpath);
598 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);
599 if (cpio->pass_destpath == NULL)
601 "Can't allocate path buffer");
603 strcpy(cpio->pass_destpath, cpio->destdir);
607 strcat(cpio->pass_destpath, p);
608 destpath = cpio->pass_destpath;
610 if (cpio->option_rename)
611 destpath = cpio_rename(destpath);
612 if (destpath == NULL)
614 archive_entry_copy_pathname(entry, destpath);
617 * If we're trying to preserve hardlinks, match them here.
620 if (cpio->linkresolver != NULL
621 && archive_entry_filetype(entry) != AE_IFDIR) {
622 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
626 r = entry_to_archive(cpio, entry);
627 archive_entry_free(entry);
630 r = entry_to_archive(cpio, spare);
631 archive_entry_free(spare);
638 entry_to_archive(struct cpio *cpio, struct archive_entry *entry)
640 const char *destpath = archive_entry_pathname(entry);
641 const char *srcpath = archive_entry_sourcepath(entry);
646 /* Print out the destination name to the user. */
648 fprintf(stderr,"%s", destpath);
651 * Option_link only makes sense in pass mode and for
652 * regular files. Also note: if a link operation fails
653 * because of cross-device restrictions, we'll fall back
654 * to copy mode for that entry.
656 * TODO: Test other cpio implementations to see if they
657 * hard-link anything other than regular files here.
659 if (cpio->option_link
660 && archive_entry_filetype(entry) == AE_IFREG)
662 struct archive_entry *t;
663 /* Save the original entry in case we need it later. */
664 t = archive_entry_clone(entry);
666 lafe_errc(1, ENOMEM, "Can't create link");
667 /* Note: link(2) doesn't create parent directories,
668 * so we use archive_write_header() instead as a
670 archive_entry_set_hardlink(t, srcpath);
671 /* This is a straight link that carries no data. */
672 archive_entry_set_size(t, 0);
673 r = archive_write_header(cpio->archive, t);
674 archive_entry_free(t);
676 lafe_warnc(archive_errno(cpio->archive),
677 "%s", archive_error_string(cpio->archive));
678 if (r == ARCHIVE_FATAL)
681 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {
682 /* Cross-device link: Just fall through and use
683 * the original entry to copy the file over. */
684 lafe_warnc(0, "Copying file instead");
691 * Make sure we can open the file (if necessary) before
692 * trying to write the header.
694 if (archive_entry_filetype(entry) == AE_IFREG) {
695 if (archive_entry_size(entry) > 0) {
696 fd = open(srcpath, O_RDONLY | O_BINARY);
699 "%s: could not open file", srcpath);
704 archive_entry_set_size(entry, 0);
707 r = archive_write_header(cpio->archive, entry);
710 lafe_warnc(archive_errno(cpio->archive),
713 archive_error_string(cpio->archive));
715 if (r == ARCHIVE_FATAL)
718 if (r >= ARCHIVE_WARN && fd >= 0) {
719 bytes_read = read(fd, cpio->buff, cpio->buff_size);
720 while (bytes_read > 0) {
721 r = archive_write_data(cpio->archive,
722 cpio->buff, bytes_read);
724 lafe_errc(1, archive_errno(cpio->archive),
725 "%s", archive_error_string(cpio->archive));
726 if (r < bytes_read) {
728 "Truncated write; file may have grown while being archived.");
730 bytes_read = read(fd, cpio->buff, cpio->buff_size);
734 fd = restore_time(cpio, entry, srcpath, fd);
738 fprintf(stderr,"\n");
745 restore_time(struct cpio *cpio, struct archive_entry *entry,
746 const char *name, int fd)
749 static int warned = 0;
751 (void)cpio; /* UNUSED */
752 (void)entry; /* UNUSED */
753 (void)name; /* UNUSED */
756 lafe_warnc(0, "Can't restore access times on this platform");
760 #if defined(_WIN32) && !defined(__CYGWIN__)
761 struct __timeval times[2];
763 struct timeval times[2];
766 if (!cpio->option_atime_restore)
769 times[1].tv_sec = archive_entry_mtime(entry);
770 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
772 times[0].tv_sec = archive_entry_atime(entry);
773 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
775 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
776 if (fd >= 0 && futimes(fd, times) == 0)
780 * Some platform cannot restore access times if the file descriptor
789 if (lutimes(name, times) != 0)
791 if ((AE_IFLNK != archive_entry_filetype(entry))
792 && utimes(name, times) != 0)
794 lafe_warnc(errno, "Can't update time for %s", name);
801 mode_in(struct cpio *cpio)
804 struct archive_entry *entry;
806 const char *destpath;
809 ext = archive_write_disk_new();
811 lafe_errc(1, 0, "Couldn't allocate restore object");
812 r = archive_write_disk_set_options(ext, cpio->extract_flags);
814 lafe_errc(1, 0, "%s", archive_error_string(ext));
815 a = archive_read_new();
817 lafe_errc(1, 0, "Couldn't allocate archive object");
818 archive_read_support_compression_all(a);
819 archive_read_support_format_all(a);
821 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
822 lafe_errc(1, archive_errno(a),
823 "%s", archive_error_string(a));
825 r = archive_read_next_header(a, &entry);
826 if (r == ARCHIVE_EOF)
828 if (r != ARCHIVE_OK) {
829 lafe_errc(1, archive_errno(a),
830 "%s", archive_error_string(a));
832 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry)))
834 if (cpio->option_rename) {
835 destpath = cpio_rename(archive_entry_pathname(entry));
836 archive_entry_set_pathname(entry, destpath);
838 destpath = archive_entry_pathname(entry);
839 if (destpath == NULL)
842 fprintf(stdout, "%s\n", destpath);
843 if (cpio->uid_override >= 0)
844 archive_entry_set_uid(entry, cpio->uid_override);
845 if (cpio->gid_override >= 0)
846 archive_entry_set_gid(entry, cpio->gid_override);
847 r = archive_write_header(ext, entry);
848 if (r != ARCHIVE_OK) {
849 fprintf(stderr, "%s: %s\n",
850 archive_entry_pathname(entry),
851 archive_error_string(ext));
852 } else if (archive_entry_size(entry) > 0) {
853 r = extract_data(a, ext);
855 cpio->return_value = 1;
858 r = archive_read_close(a);
860 lafe_errc(1, 0, "%s", archive_error_string(a));
861 r = archive_write_close(ext);
863 lafe_errc(1, 0, "%s", archive_error_string(ext));
865 int64_t blocks = (archive_position_uncompressed(a) + 511)
867 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
868 blocks == 1 ? "block" : "blocks");
870 archive_read_finish(a);
871 archive_write_finish(ext);
872 exit(cpio->return_value);
876 * Exits if there's a fatal error. Returns ARCHIVE_OK
877 * if everything is kosher.
880 extract_data(struct archive *ar, struct archive *aw)
888 r = archive_read_data_block(ar, &block, &size, &offset);
889 if (r == ARCHIVE_EOF)
891 if (r != ARCHIVE_OK) {
892 lafe_warnc(archive_errno(ar),
893 "%s", archive_error_string(ar));
896 r = archive_write_data_block(aw, block, size, offset);
897 if (r != ARCHIVE_OK) {
898 lafe_warnc(archive_errno(aw),
899 "%s", archive_error_string(aw));
906 mode_list(struct cpio *cpio)
909 struct archive_entry *entry;
912 a = archive_read_new();
914 lafe_errc(1, 0, "Couldn't allocate archive object");
915 archive_read_support_compression_all(a);
916 archive_read_support_format_all(a);
918 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
919 lafe_errc(1, archive_errno(a),
920 "%s", archive_error_string(a));
922 r = archive_read_next_header(a, &entry);
923 if (r == ARCHIVE_EOF)
925 if (r != ARCHIVE_OK) {
926 lafe_errc(1, archive_errno(a),
927 "%s", archive_error_string(a));
929 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry)))
932 list_item_verbose(cpio, entry);
934 fprintf(stdout, "%s\n", archive_entry_pathname(entry));
936 r = archive_read_close(a);
938 lafe_errc(1, 0, "%s", archive_error_string(a));
940 int64_t blocks = (archive_position_uncompressed(a) + 511)
942 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
943 blocks == 1 ? "block" : "blocks");
945 archive_read_finish(a);
950 * Display information about the current file.
952 * The format here roughly duplicates the output of 'ls -l'.
953 * This is based on SUSv2, where 'tar tv' is documented as
954 * listing additional information in an "unspecified format,"
955 * and 'pax -l' is documented as using the same format as 'ls -l'.
958 list_item_verbose(struct cpio *cpio, struct archive_entry *entry)
962 char uids[16], gids[16];
963 const char *uname, *gname;
972 if (cpio->option_numeric_uid_gid) {
973 /* Format numeric uid/gid for display. */
974 strcpy(uids, cpio_i64toa(archive_entry_uid(entry)));
976 strcpy(gids, cpio_i64toa(archive_entry_gid(entry)));
979 /* Use uname if it's present, else lookup name from uid. */
980 uname = archive_entry_uname(entry);
982 uname = lookup_uname(cpio, archive_entry_uid(entry));
983 /* Use gname if it's present, else lookup name from gid. */
984 gname = archive_entry_gname(entry);
986 gname = lookup_gname(cpio, archive_entry_gid(entry));
989 /* Print device number or file size. */
990 if (archive_entry_filetype(entry) == AE_IFCHR
991 || archive_entry_filetype(entry) == AE_IFBLK) {
992 snprintf(size, sizeof(size), "%lu,%lu",
993 (unsigned long)archive_entry_rdevmajor(entry),
994 (unsigned long)archive_entry_rdevminor(entry));
996 strcpy(size, cpio_i64toa(archive_entry_size(entry)));
999 /* Format the time using 'ls -l' conventions. */
1000 mtime = archive_entry_mtime(entry);
1001 #if defined(_WIN32) && !defined(__CYGWIN__)
1002 /* Windows' strftime function does not support %e format. */
1003 if (mtime - now > 365*86400/2
1004 || mtime - now < -365*86400/2)
1005 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y";
1007 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M";
1009 if (abs(mtime - now) > (365/2)*86400)
1010 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y";
1012 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M";
1014 strftime(date, sizeof(date), fmt, localtime(&mtime));
1016 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s",
1017 archive_entry_strmode(entry),
1018 archive_entry_nlink(entry),
1019 uname, gname, size, date,
1020 archive_entry_pathname(entry));
1022 /* Extra information for links. */
1023 if (archive_entry_hardlink(entry)) /* Hard link */
1024 fprintf(out, " link to %s", archive_entry_hardlink(entry));
1025 else if (archive_entry_symlink(entry)) /* Symbolic link */
1026 fprintf(out, " -> %s", archive_entry_symlink(entry));
1031 mode_pass(struct cpio *cpio, const char *destdir)
1033 struct lafe_line_reader *lr;
1037 /* Ensure target dir has a trailing '/' to simplify path surgery. */
1038 cpio->destdir = malloc(strlen(destdir) + 8);
1039 strcpy(cpio->destdir, destdir);
1040 if (destdir[strlen(destdir) - 1] != '/')
1041 strcat(cpio->destdir, "/");
1043 cpio->archive = archive_write_disk_new();
1044 if (cpio->archive == NULL)
1045 lafe_errc(1, 0, "Failed to allocate archive object");
1046 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags);
1047 if (r != ARCHIVE_OK)
1048 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1049 cpio->linkresolver = archive_entry_linkresolver_new();
1050 archive_write_disk_set_standard_lookup(cpio->archive);
1052 cpio->archive_read_disk = archive_read_disk_new();
1053 if (cpio->archive_read_disk == NULL)
1054 lafe_errc(1, 0, "Failed to allocate archive object");
1055 if (cpio->option_follow_links)
1056 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
1058 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
1059 archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
1061 lr = lafe_line_reader("-", cpio->option_null);
1062 while ((p = lafe_line_reader_next(lr)) != NULL)
1063 file_to_archive(cpio, p);
1064 lafe_line_reader_free(lr);
1066 archive_entry_linkresolver_free(cpio->linkresolver);
1067 r = archive_write_close(cpio->archive);
1068 if (r != ARCHIVE_OK)
1069 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1073 (archive_position_uncompressed(cpio->archive) + 511)
1075 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
1076 blocks == 1 ? "block" : "blocks");
1079 archive_write_finish(cpio->archive);
1083 * Prompt for a new name for this entry. Returns a pointer to the
1084 * new name or NULL if the entry should not be copied. This
1085 * implements the semantics defined in POSIX.1-1996, which specifies
1086 * that an input of '.' means the name should be unchanged. GNU cpio
1087 * treats '.' as a literal new name.
1090 cpio_rename(const char *name)
1092 static char buff[1024];
1096 t = fopen("/dev/tty", "r+");
1099 fprintf(t, "%s (Enter/./(new name))? ", name);
1102 p = fgets(buff, sizeof(buff), t);
1105 /* End-of-file is a blank line. */
1108 while (*p == ' ' || *p == '\t')
1110 if (*p == '\n' || *p == '\0')
1113 if (*p == '.' && p[1] == '\n')
1114 /* Single period preserves original name. */
1117 /* Trim the final newline. */
1118 while (*p != '\0' && *p != '\n')
1120 /* Overwrite the final \n with a null character. */
1126 free_cache(struct name_cache *cache)
1130 if (cache != NULL) {
1131 for (i = 0; i < cache->size; i++)
1132 free(cache->cache[i].name);
1138 * Lookup uname/gname from uid/gid, return NULL if no match.
1141 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable,
1142 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id)
1145 struct name_cache *cache;
1150 if (*name_cache_variable == NULL) {
1151 *name_cache_variable = malloc(sizeof(struct name_cache));
1152 if (*name_cache_variable == NULL)
1153 lafe_errc(1, ENOMEM, "No more memory");
1154 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1155 (*name_cache_variable)->size = name_cache_size;
1158 cache = *name_cache_variable;
1161 slot = id % cache->size;
1162 if (cache->cache[slot].name != NULL) {
1163 if (cache->cache[slot].id == id) {
1165 return (cache->cache[slot].name);
1167 free(cache->cache[slot].name);
1168 cache->cache[slot].name = NULL;
1171 if (lookup_fn(cpio, &name, id) == 0) {
1172 if (name == NULL || name[0] == '\0') {
1173 /* If lookup failed, format it as a number. */
1174 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id);
1177 cache->cache[slot].name = strdup(name);
1178 if (cache->cache[slot].name != NULL) {
1179 cache->cache[slot].id = id;
1180 return (cache->cache[slot].name);
1183 * Conveniently, NULL marks an empty slot, so
1184 * if the strdup() fails, we've just failed to
1185 * cache it. No recovery necessary.
1192 lookup_uname(struct cpio *cpio, uid_t uid)
1194 return (lookup_name(cpio, &cpio->uname_cache,
1195 &lookup_uname_helper, (id_t)uid));
1199 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id)
1201 struct passwd *pwent;
1203 (void)cpio; /* UNUSED */
1206 pwent = getpwuid((uid_t)id);
1207 if (pwent == NULL) {
1209 if (errno != 0 && errno != ENOENT)
1210 lafe_warnc(errno, "getpwuid(%d) failed", id);
1214 *name = pwent->pw_name;
1219 lookup_gname(struct cpio *cpio, gid_t gid)
1221 return (lookup_name(cpio, &cpio->gname_cache,
1222 &lookup_gname_helper, (id_t)gid));
1226 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id)
1228 struct group *grent;
1230 (void)cpio; /* UNUSED */
1233 grent = getgrgid((gid_t)id);
1234 if (grent == NULL) {
1237 lafe_warnc(errno, "getgrgid(%d) failed", id);
1241 *name = grent->gr_name;
1246 * It would be nice to just use printf() for formatting large numbers,
1247 * but the compatibility problems are a big headache. Hence the
1248 * following simple utility function.
1251 cpio_i64toa(int64_t n0)
1253 // 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice.
1254 // We also need 1 byte for '-' and 1 for '\0'.
1255 static char buff[22];
1256 int64_t n = n0 < 0 ? -n0 : n0;
1257 char *p = buff + sizeof(buff);
1261 *--p = '0' + (int)(n % 10);