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 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "bsdtar_platform.h"
27 __FBSDID("$FreeBSD$");
29 #ifdef HAVE_SYS_TYPES_H
30 #include <sys/types.h>
35 #ifdef HAVE_SYS_IOCTL_H
36 #include <sys/ioctl.h>
38 #ifdef HAVE_SYS_STAT_H
41 #ifdef HAVE_ATTR_XATTR_H
42 #include <attr/xattr.h>
47 #ifdef HAVE_EXT2FS_EXT2_FS_H
48 #include <ext2fs/ext2_fs.h>
62 #ifdef HAVE_LINUX_FS_H
63 #include <linux/fs.h> /* for Linux file flags */
82 /* Size of buffer for holding file data prior to writing. */
83 #define FILEDATABUFLEN 65536
85 /* Fixed size of uname/gname caches. */
86 #define name_cache_size 101
88 static const char * const NO_NAME = "(noname)";
90 struct archive_dir_entry {
91 struct archive_dir_entry *next;
98 struct archive_dir_entry *head, *tail;
108 } cache[name_cache_size];
111 static void add_dir_list(struct bsdtar *bsdtar, const char *path,
112 time_t mtime_sec, int mtime_nsec);
113 static int append_archive(struct bsdtar *, struct archive *,
114 struct archive *ina);
115 static int append_archive_filename(struct bsdtar *,
116 struct archive *, const char *fname);
117 static void archive_names_from_file(struct bsdtar *bsdtar,
119 static int archive_names_from_file_helper(struct bsdtar *bsdtar,
121 static int copy_file_data(struct bsdtar *bsdtar,
122 struct archive *a, struct archive *ina);
123 static void create_cleanup(struct bsdtar *);
124 static void free_cache(struct name_cache *cache);
125 static const char * lookup_gname(struct bsdtar *bsdtar, gid_t gid);
126 static int lookup_gname_helper(struct bsdtar *bsdtar,
127 const char **name, id_t gid);
128 static const char * lookup_uname(struct bsdtar *bsdtar, uid_t uid);
129 static int lookup_uname_helper(struct bsdtar *bsdtar,
130 const char **name, id_t uid);
131 static int new_enough(struct bsdtar *, const char *path,
132 const struct stat *);
133 static void setup_acls(struct bsdtar *, struct archive_entry *,
135 static void setup_xattrs(struct bsdtar *, struct archive_entry *,
137 static void test_for_append(struct bsdtar *);
138 static void write_archive(struct archive *, struct bsdtar *);
139 static void write_entry(struct bsdtar *, struct archive *,
140 const struct stat *, const char *pathname,
141 const char *accpath);
142 static void write_entry_backend(struct bsdtar *, struct archive *,
143 struct archive_entry *);
144 static int write_file_data(struct bsdtar *, struct archive *,
145 struct archive_entry *, int fd);
146 static void write_hierarchy(struct bsdtar *, struct archive *,
150 tar_mode_c(struct bsdtar *bsdtar)
155 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
156 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
158 a = archive_write_new();
160 /* Support any format that the library supports. */
161 if (bsdtar->create_format == NULL) {
162 r = archive_write_set_format_pax_restricted(a);
163 bsdtar->create_format = "pax restricted";
165 r = archive_write_set_format_by_name(a, bsdtar->create_format);
167 if (r != ARCHIVE_OK) {
168 fprintf(stderr, "Can't use format %s: %s\n",
169 bsdtar->create_format,
170 archive_error_string(a));
175 * If user explicitly set the block size, then assume they
176 * want the last block padded as well. Otherwise, use the
177 * default block size and accept archive_write_open_file()'s
178 * default padding decisions.
180 if (bsdtar->bytes_per_block != 0) {
181 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
182 archive_write_set_bytes_in_last_block(a,
183 bsdtar->bytes_per_block);
185 archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
187 if (bsdtar->compress_program) {
188 archive_write_set_compression_program(a, bsdtar->compress_program);
190 switch (bsdtar->create_compression) {
192 archive_write_set_compression_none(a);
196 archive_write_set_compression_bzip2(a);
201 archive_write_set_compression_gzip(a);
205 archive_write_set_compression_compress(a);
208 bsdtar_errc(bsdtar, 1, 0,
209 "Unrecognized compression option -%c",
210 bsdtar->create_compression);
214 r = archive_write_open_file(a, bsdtar->filename);
216 bsdtar_errc(bsdtar, 1, 0, archive_error_string(a));
218 write_archive(a, bsdtar);
222 * Same as 'c', except we only support tar or empty formats in
223 * uncompressed files on disk.
226 tar_mode_r(struct bsdtar *bsdtar)
231 struct archive_entry *entry;
234 /* Sanity-test some arguments and the file. */
235 test_for_append(bsdtar);
237 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
239 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT, 0666);
241 bsdtar_errc(bsdtar, 1, errno,
242 "Cannot open %s", bsdtar->filename);
244 a = archive_read_new();
245 archive_read_support_compression_all(a);
246 archive_read_support_format_tar(a);
247 archive_read_support_format_gnutar(a);
248 r = archive_read_open_fd(a, bsdtar->fd, 10240);
250 bsdtar_errc(bsdtar, 1, archive_errno(a),
251 "Can't read archive %s: %s", bsdtar->filename,
252 archive_error_string(a));
253 while (0 == archive_read_next_header(a, &entry)) {
254 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
255 archive_read_finish(a);
257 bsdtar_errc(bsdtar, 1, 0,
258 "Cannot append to compressed archive.");
260 /* Keep going until we hit end-of-archive */
261 format = archive_format(a);
264 end_offset = archive_read_header_position(a);
265 archive_read_finish(a);
267 /* Re-open archive for writing */
268 a = archive_write_new();
269 archive_write_set_compression_none(a);
271 * Set the format to be used for writing. To allow people to
272 * extend empty files, we need to allow them to specify the format,
273 * which opens the possibility that they will specify a format that
274 * doesn't match the existing format. Hence, the following bit
275 * of arcane ugliness.
278 if (bsdtar->create_format != NULL) {
279 /* If the user requested a format, use that, but ... */
280 archive_write_set_format_by_name(a,
281 bsdtar->create_format);
282 /* ... complain if it's not compatible. */
283 format &= ARCHIVE_FORMAT_BASE_MASK;
284 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK)
285 && format != ARCHIVE_FORMAT_EMPTY) {
286 bsdtar_errc(bsdtar, 1, 0,
287 "Format %s is incompatible with the archive %s.",
288 bsdtar->create_format, bsdtar->filename);
292 * Just preserve the current format, with a little care
293 * for formats that libarchive can't write.
295 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
296 /* TODO: When gtar supports pax, use pax restricted. */
297 format = ARCHIVE_FORMAT_TAR_USTAR;
298 if (format == ARCHIVE_FORMAT_EMPTY)
299 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
300 archive_write_set_format(a, format);
302 lseek(bsdtar->fd, end_offset, SEEK_SET); /* XXX check return val XXX */
303 archive_write_open_fd(a, bsdtar->fd); /* XXX check return val XXX */
305 write_archive(a, bsdtar); /* XXX check return val XXX */
312 tar_mode_u(struct bsdtar *bsdtar)
316 struct archive_entry *entry;
318 struct archive_dir_entry *p;
319 struct archive_dir archive_dir;
321 bsdtar->archive_dir = &archive_dir;
322 memset(&archive_dir, 0, sizeof(archive_dir));
324 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
326 /* Sanity-test some arguments and the file. */
327 test_for_append(bsdtar);
329 bsdtar->fd = open(bsdtar->filename, O_RDWR);
331 bsdtar_errc(bsdtar, 1, errno,
332 "Cannot open %s", bsdtar->filename);
334 a = archive_read_new();
335 archive_read_support_compression_all(a);
336 archive_read_support_format_tar(a);
337 archive_read_support_format_gnutar(a);
338 if (archive_read_open_fd(a, bsdtar->fd,
339 bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
340 DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
341 bsdtar_errc(bsdtar, 1, 0,
342 "Can't open %s: %s", bsdtar->filename,
343 archive_error_string(a));
346 /* Build a list of all entries and their recorded mod times. */
347 while (0 == archive_read_next_header(a, &entry)) {
348 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
349 archive_read_finish(a);
351 bsdtar_errc(bsdtar, 1, 0,
352 "Cannot append to compressed archive.");
354 add_dir_list(bsdtar, archive_entry_pathname(entry),
355 archive_entry_mtime(entry),
356 archive_entry_mtime_nsec(entry));
357 /* Record the last format determination we see */
358 format = archive_format(a);
359 /* Keep going until we hit end-of-archive */
362 end_offset = archive_read_header_position(a);
363 archive_read_finish(a);
365 /* Re-open archive for writing. */
366 a = archive_write_new();
367 archive_write_set_compression_none(a);
369 * Set format to same one auto-detected above, except that
370 * we don't write GNU tar format, so use ustar instead.
372 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
373 format = ARCHIVE_FORMAT_TAR_USTAR;
374 archive_write_set_format(a, format);
375 if (bsdtar->bytes_per_block != 0) {
376 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
377 archive_write_set_bytes_in_last_block(a,
378 bsdtar->bytes_per_block);
380 archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
381 lseek(bsdtar->fd, end_offset, SEEK_SET);
382 ftruncate(bsdtar->fd, end_offset);
383 archive_write_open_fd(a, bsdtar->fd);
385 write_archive(a, bsdtar);
390 while (bsdtar->archive_dir->head != NULL) {
391 p = bsdtar->archive_dir->head->next;
392 free(bsdtar->archive_dir->head->name);
393 free(bsdtar->archive_dir->head);
394 bsdtar->archive_dir->head = p;
396 bsdtar->archive_dir->tail = NULL;
401 * Write user-specified files/dirs to opened archive.
404 write_archive(struct archive *a, struct bsdtar *bsdtar)
407 struct archive_entry *entry, *sparse_entry;
409 /* We want to catch SIGINFO and SIGUSR1. */
410 siginfo_init(bsdtar);
412 /* Allocate a buffer for file data. */
413 if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == NULL)
414 bsdtar_errc(bsdtar, 1, 0, "cannot allocate memory");
416 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
417 bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver");
418 archive_entry_linkresolver_set_strategy(bsdtar->resolver,
421 if (bsdtar->names_from_file != NULL)
422 archive_names_from_file(bsdtar, a);
424 while (*bsdtar->argv) {
426 if (arg[0] == '-' && arg[1] == 'C') {
432 bsdtar_warnc(bsdtar, 1, 0,
433 "Missing argument for -C");
434 bsdtar->return_value = 1;
438 set_chdir(bsdtar, arg);
440 if (*arg != '/' && (arg[0] != '@' || arg[1] != '/'))
441 do_chdir(bsdtar); /* Handle a deferred -C */
443 if (append_archive_filename(bsdtar, a,
447 write_hierarchy(bsdtar, a, arg);
453 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
454 while (entry != NULL) {
455 write_entry_backend(bsdtar, a, entry);
456 archive_entry_free(entry);
458 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
461 create_cleanup(bsdtar);
462 if (archive_write_close(a)) {
463 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
464 bsdtar->return_value = 1;
468 /* Free file data buffer. */
471 if (bsdtar->option_totals) {
472 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
473 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
476 archive_write_finish(a);
478 /* Restore old SIGINFO + SIGUSR1 handlers. */
479 siginfo_done(bsdtar);
483 * Archive names specified in file.
485 * Unless --null was specified, a line containing exactly "-C" will
486 * cause the next line to be a directory to pass to chdir(). If
487 * --null is specified, then a line "-C" is just another filename.
490 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
494 bsdtar->next_line_is_dir = 0;
495 process_lines(bsdtar, bsdtar->names_from_file,
496 archive_names_from_file_helper);
497 if (bsdtar->next_line_is_dir)
498 bsdtar_errc(bsdtar, 1, errno,
499 "Unexpected end of filename list; "
500 "directory expected after -C");
504 archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
506 if (bsdtar->next_line_is_dir) {
507 set_chdir(bsdtar, line);
508 bsdtar->next_line_is_dir = 0;
509 } else if (!bsdtar->option_null && strcmp(line, "-C") == 0)
510 bsdtar->next_line_is_dir = 1;
513 do_chdir(bsdtar); /* Handle a deferred -C */
514 write_hierarchy(bsdtar, bsdtar->archive, line);
520 * Copy from specified archive to current archive. Returns non-zero
521 * for write errors (which force us to terminate the entire archiving
522 * operation). If there are errors reading the input archive, we set
523 * bsdtar->return_value but return zero, so the overall archiving
524 * operation will complete and return non-zero.
527 append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
528 const char *filename)
533 if (strcmp(filename, "-") == 0)
534 filename = NULL; /* Library uses NULL for stdio. */
536 ina = archive_read_new();
537 archive_read_support_format_all(ina);
538 archive_read_support_compression_all(ina);
539 if (archive_read_open_file(ina, filename, 10240)) {
540 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(ina));
541 bsdtar->return_value = 1;
545 rc = append_archive(bsdtar, a, ina);
547 if (archive_errno(ina)) {
548 bsdtar_warnc(bsdtar, 0, "Error reading archive %s: %s",
549 filename, archive_error_string(ina));
550 bsdtar->return_value = 1;
552 archive_read_finish(ina);
558 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
560 struct archive_entry *in_entry;
563 while (0 == archive_read_next_header(ina, &in_entry)) {
564 if (!new_enough(bsdtar, archive_entry_pathname(in_entry),
565 archive_entry_stat(in_entry)))
567 if (excluded(bsdtar, archive_entry_pathname(in_entry)))
569 if (bsdtar->option_interactive &&
570 !yes("copy '%s'", archive_entry_pathname(in_entry)))
573 safe_fprintf(stderr, "a %s",
574 archive_entry_pathname(in_entry));
575 siginfo_setinfo(bsdtar, "copying",
576 archive_entry_pathname(in_entry),
577 archive_entry_size(in_entry));
578 siginfo_printinfo(bsdtar, 0);
580 e = archive_write_header(a, in_entry);
581 if (e != ARCHIVE_OK) {
582 if (!bsdtar->verbose)
583 bsdtar_warnc(bsdtar, 0, "%s: %s",
584 archive_entry_pathname(in_entry),
585 archive_error_string(a));
587 fprintf(stderr, ": %s", archive_error_string(a));
589 if (e == ARCHIVE_FATAL)
592 if (e >= ARCHIVE_WARN) {
593 if (archive_entry_size(in_entry) == 0)
594 archive_read_data_skip(ina);
595 else if (copy_file_data(bsdtar, a, ina))
600 fprintf(stderr, "\n");
603 /* Note: If we got here, we saw no write errors, so return success. */
607 /* Helper function to copy data between archives. */
609 copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
612 ssize_t bytes_written;
615 bytes_read = archive_read_data(ina, bsdtar->buff, FILEDATABUFLEN);
616 while (bytes_read > 0) {
617 siginfo_printinfo(bsdtar, progress);
619 bytes_written = archive_write_data(a, bsdtar->buff,
621 if (bytes_written < bytes_read) {
622 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
625 progress += bytes_written;
626 bytes_read = archive_read_data(ina, bsdtar->buff,
634 * Add the file or dir hierarchy named by 'path' to the archive
637 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
640 char symlink_mode = bsdtar->symlink_mode;
642 int dev_recorded = 0;
645 tree = tree_open(path);
648 bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path);
649 bsdtar->return_value = 1;
653 while ((tree_ret = tree_next(tree))) {
654 const char *name = tree_current_path(tree);
655 const struct stat *st = NULL, *lst = NULL;
658 if (tree_ret == TREE_ERROR_FATAL)
659 bsdtar_errc(bsdtar, 1, tree_errno(tree),
660 "%s: Unable to continue traversing directory tree",
662 if (tree_ret == TREE_ERROR_DIR) {
663 bsdtar_warnc(bsdtar, errno,
664 "%s: Couldn't visit directory", name);
665 bsdtar->return_value = 1;
667 if (tree_ret != TREE_REGULAR)
669 lst = tree_current_lstat(tree);
671 /* Couldn't lstat(); must not exist. */
672 bsdtar_warnc(bsdtar, errno, "%s: Cannot stat", name);
675 * Report an error via the exit code if the failed
676 * path is a prefix of what the user provided via
677 * the command line. (Testing for string equality
678 * here won't work due to trailing '/' characters.)
680 if (memcmp(name, path, strlen(name)) == 0)
681 bsdtar->return_value = 1;
685 if (S_ISLNK(lst->st_mode))
686 st = tree_current_stat(tree);
687 /* Default: descend into any dir or symlink to dir. */
688 /* We'll adjust this later on. */
690 if ((st != NULL) && S_ISDIR(st->st_mode))
692 if ((lst != NULL) && S_ISDIR(lst->st_mode))
696 * If user has asked us not to cross mount points,
697 * then don't descend into into a dir on a different
701 first_dev = lst->st_dev;
704 if (bsdtar->option_dont_traverse_mounts) {
705 if (lst != NULL && lst->st_dev != first_dev)
710 * If this file/dir is flagged "nodump" and we're
711 * honoring such flags, skip this file/dir.
713 #ifdef HAVE_STRUCT_STAT_ST_FLAGS
714 /* BSD systems store flags in struct stat */
715 if (bsdtar->option_honor_nodump &&
716 (lst->st_flags & UF_NODUMP))
720 #if defined(EXT2_IOC_GETFLAGS) && defined(EXT2_NODUMP_FL)
721 /* Linux uses ioctl to read flags. */
722 if (bsdtar->option_honor_nodump) {
723 int fd = open(name, O_RDONLY | O_NONBLOCK);
725 unsigned long fflags;
726 int r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags);
728 if (r >= 0 && (fflags & EXT2_NODUMP_FL))
735 * If this file/dir is excluded by a filename
738 if (excluded(bsdtar, name))
742 * If the user vetoes this file/directory, skip it.
744 if (bsdtar->option_interactive &&
745 !yes("add '%s'", name))
749 * If this is a dir, decide whether or not to recurse.
751 if (bsdtar->option_no_subdirs)
755 * Distinguish 'L'/'P'/'H' symlink following.
757 switch(symlink_mode) {
759 /* 'H': After the first item, rest like 'P'. */
761 /* 'H': First item (from command line) like 'L'. */
764 /* 'L': Do descend through a symlink to dir. */
765 /* 'L': Archive symlink to file as file. */
766 lst = tree_current_stat(tree);
767 /* If stat fails, we have a broken symlink;
768 * in that case, archive the link as such. */
770 lst = tree_current_lstat(tree);
773 /* 'P': Don't descend through a symlink to dir. */
774 if (!S_ISDIR(lst->st_mode))
776 /* 'P': Archive symlink to file as symlink. */
777 /* lst = tree_current_lstat(tree); */
785 * Write the entry. Note that write_entry() handles
786 * pathname editing and newness testing.
788 write_entry(bsdtar, a, lst, name,
789 tree_current_access_path(tree));
795 * Backend for write_entry.
798 write_entry_backend(struct bsdtar *bsdtar, struct archive *a,
799 struct archive_entry *entry)
804 if (archive_entry_size(entry) > 0) {
805 const char *pathname = archive_entry_sourcepath(entry);
806 fd = open(pathname, O_RDONLY);
808 if (!bsdtar->verbose)
809 bsdtar_warnc(bsdtar, errno,
810 "%s: could not open file", pathname);
812 fprintf(stderr, ": %s", strerror(errno));
817 e = archive_write_header(a, entry);
818 if (e != ARCHIVE_OK) {
819 if (!bsdtar->verbose)
820 bsdtar_warnc(bsdtar, 0, "%s: %s",
821 archive_entry_pathname(entry),
822 archive_error_string(a));
824 fprintf(stderr, ": %s", archive_error_string(a));
827 if (e == ARCHIVE_FATAL)
831 * If we opened a file earlier, write it out now. Note that
832 * the format handler might have reset the size field to zero
833 * to inform us that the archive body won't get stored. In
834 * that case, just skip the write.
836 if (e >= ARCHIVE_WARN && fd >= 0 && archive_entry_size(entry) > 0) {
837 if (write_file_data(bsdtar, a, entry, fd))
842 * If we opened a file, close it now even if there was an error
843 * which made us decide not to write the archive body.
850 * Add a single filesystem object to the archive.
853 write_entry(struct bsdtar *bsdtar, struct archive *a, const struct stat *st,
854 const char *pathname, const char *accpath)
856 struct archive_entry *entry, *sparse_entry;
857 static char linkbuffer[PATH_MAX+1];
859 entry = archive_entry_new();
861 archive_entry_set_pathname(entry, pathname);
862 archive_entry_copy_sourcepath(entry, accpath);
865 * Rewrite the pathname to be archived. If rewrite
866 * fails, skip the entry.
868 if (edit_pathname(bsdtar, entry))
872 * In -u mode, check that the file is newer than what's
873 * already in the archive; in all modes, obey --newerXXX flags.
875 if (!new_enough(bsdtar, archive_entry_pathname(entry), st))
878 /* Display entry as we process it. This format is required by SUSv2. */
880 safe_fprintf(stderr, "a %s", archive_entry_pathname(entry));
882 /* Read symbolic link information. */
883 if ((st->st_mode & S_IFMT) == S_IFLNK) {
886 lnklen = readlink(accpath, linkbuffer, PATH_MAX);
888 if (!bsdtar->verbose)
889 bsdtar_warnc(bsdtar, errno,
890 "%s: Couldn't read symbolic link",
894 ": Couldn't read symbolic link: %s",
898 linkbuffer[lnklen] = 0;
899 archive_entry_set_symlink(entry, linkbuffer);
902 /* Look up username and group name. */
903 archive_entry_set_uname(entry, lookup_uname(bsdtar, st->st_uid));
904 archive_entry_set_gname(entry, lookup_gname(bsdtar, st->st_gid));
906 #ifdef HAVE_STRUCT_STAT_ST_FLAGS
907 /* XXX TODO: archive_entry_copy_stat() should copy st_flags
908 * on platforms that support it. This should go away then. */
909 if (st->st_flags != 0)
910 archive_entry_set_fflags(entry, st->st_flags, 0);
913 #ifdef EXT2_IOC_GETFLAGS
914 /* XXX TODO: Find a way to merge this with the
915 * flags fetch for nodump support earlier. */
916 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
917 int fd = open(accpath, O_RDONLY | O_NONBLOCK);
919 unsigned long stflags;
920 int r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
922 if (r == 0 && stflags != 0)
923 archive_entry_set_fflags(entry, stflags, 0);
928 archive_entry_copy_stat(entry, st);
929 setup_acls(bsdtar, entry, accpath);
930 setup_xattrs(bsdtar, entry, accpath);
932 /* Non-regular files get archived with zero size. */
933 if (!S_ISREG(st->st_mode))
934 archive_entry_set_size(entry, 0);
936 /* Record what we're doing, for the benefit of SIGINFO / SIGUSR1. */
937 siginfo_setinfo(bsdtar, "adding", archive_entry_pathname(entry),
938 archive_entry_size(entry));
939 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
941 /* Handle SIGINFO / SIGUSR1 request if one was made. */
942 siginfo_printinfo(bsdtar, 0);
944 while (entry != NULL) {
945 write_entry_backend(bsdtar, a, entry);
946 archive_entry_free(entry);
947 entry = sparse_entry;
953 fprintf(stderr, "\n");
957 archive_entry_free(entry);
961 /* Helper function to copy file to archive. */
963 write_file_data(struct bsdtar *bsdtar, struct archive *a,
964 struct archive_entry *entry, int fd)
967 ssize_t bytes_written;
970 bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN);
971 while (bytes_read > 0) {
972 siginfo_printinfo(bsdtar, progress);
974 bytes_written = archive_write_data(a, bsdtar->buff,
976 if (bytes_written < 0) {
977 /* Write failed; this is bad */
978 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
981 if (bytes_written < bytes_read) {
982 /* Write was truncated; warn but continue. */
983 bsdtar_warnc(bsdtar, 0,
984 "%s: Truncated write; file may have grown while being archived.",
985 archive_entry_pathname(entry));
988 progress += bytes_written;
989 bytes_read = read(fd, bsdtar->buff, FILEDATABUFLEN);
996 create_cleanup(struct bsdtar *bsdtar)
998 free_cache(bsdtar->uname_cache);
999 bsdtar->uname_cache = NULL;
1000 free_cache(bsdtar->gname_cache);
1001 bsdtar->gname_cache = NULL;
1004 #ifdef HAVE_POSIX_ACL
1005 static void setup_acl(struct bsdtar *bsdtar,
1006 struct archive_entry *entry, const char *accpath,
1007 int acl_type, int archive_entry_acl_type);
1010 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1011 const char *accpath)
1013 archive_entry_acl_clear(entry);
1015 setup_acl(bsdtar, entry, accpath,
1016 ACL_TYPE_ACCESS, ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
1017 /* Only directories can have default ACLs. */
1018 if (S_ISDIR(archive_entry_mode(entry)))
1019 setup_acl(bsdtar, entry, accpath,
1020 ACL_TYPE_DEFAULT, ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
1024 setup_acl(struct bsdtar *bsdtar, struct archive_entry *entry,
1025 const char *accpath, int acl_type, int archive_entry_acl_type)
1029 acl_entry_t acl_entry;
1030 acl_permset_t acl_permset;
1031 int s, ae_id, ae_tag, ae_perm;
1032 const char *ae_name;
1034 /* Retrieve access ACL from file. */
1035 acl = acl_get_file(accpath, acl_type);
1037 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
1042 acl_get_tag_type(acl_entry, &acl_tag);
1043 if (acl_tag == ACL_USER) {
1044 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
1045 ae_name = lookup_uname(bsdtar, ae_id);
1046 ae_tag = ARCHIVE_ENTRY_ACL_USER;
1047 } else if (acl_tag == ACL_GROUP) {
1048 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
1049 ae_name = lookup_gname(bsdtar, ae_id);
1050 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
1051 } else if (acl_tag == ACL_MASK) {
1052 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
1053 } else if (acl_tag == ACL_USER_OBJ) {
1054 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
1055 } else if (acl_tag == ACL_GROUP_OBJ) {
1056 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
1057 } else if (acl_tag == ACL_OTHER) {
1058 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
1060 /* Skip types that libarchive can't support. */
1064 acl_get_permset(acl_entry, &acl_permset);
1067 * acl_get_perm() is spelled differently on different
1068 * platforms; see bsdtar_platform.h for details.
1070 if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
1071 ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
1072 if (ACL_GET_PERM(acl_permset, ACL_READ))
1073 ae_perm |= ARCHIVE_ENTRY_ACL_READ;
1074 if (ACL_GET_PERM(acl_permset, ACL_WRITE))
1075 ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
1077 archive_entry_acl_add_entry(entry,
1078 archive_entry_acl_type, ae_perm, ae_tag,
1081 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
1088 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1089 const char *accpath)
1097 #if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
1100 setup_xattr(struct bsdtar *bsdtar, struct archive_entry *entry,
1101 const char *accpath, const char *name)
1105 char symlink_mode = bsdtar->symlink_mode;
1107 if (symlink_mode == 'H')
1108 size = getxattr(accpath, name, NULL, 0);
1110 size = lgetxattr(accpath, name, NULL, 0);
1113 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1117 if (size > 0 && (value = malloc(size)) == NULL) {
1118 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1122 if (symlink_mode == 'H')
1123 size = getxattr(accpath, name, value, size);
1125 size = lgetxattr(accpath, name, value, size);
1128 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1132 archive_entry_xattr_add_entry(entry, name, value, size);
1138 * Linux extended attribute support
1141 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1142 const char *accpath)
1146 char symlink_mode = bsdtar->symlink_mode;
1148 if (symlink_mode == 'H')
1149 list_size = listxattr(accpath, NULL, 0);
1151 list_size = llistxattr(accpath, NULL, 0);
1153 if (list_size == -1) {
1154 bsdtar_warnc(bsdtar, errno,
1155 "Couldn't list extended attributes");
1157 } else if (list_size == 0)
1160 if ((list = malloc(list_size)) == NULL) {
1161 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1165 if (symlink_mode == 'H')
1166 list_size = listxattr(accpath, list, list_size);
1168 list_size = llistxattr(accpath, list, list_size);
1170 if (list_size == -1) {
1171 bsdtar_warnc(bsdtar, errno,
1172 "Couldn't list extended attributes");
1177 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
1178 if (strncmp(p, "system.", 7) == 0 ||
1179 strncmp(p, "xfsroot.", 8) == 0)
1182 setup_xattr(bsdtar, entry, accpath, p);
1191 * Generic (stub) extended attribute support.
1194 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1195 const char *accpath)
1197 (void)bsdtar; /* UNUSED */
1198 (void)entry; /* UNUSED */
1199 (void)accpath; /* UNUSED */
1205 free_cache(struct name_cache *cache)
1209 if (cache != NULL) {
1210 for (i = 0; i < cache->size; i++) {
1211 if (cache->cache[i].name != NULL &&
1212 cache->cache[i].name != NO_NAME)
1213 free((void *)(uintptr_t)cache->cache[i].name);
1220 * Lookup uid/gid from uname/gname, return NULL if no match.
1223 lookup_name(struct bsdtar *bsdtar, struct name_cache **name_cache_variable,
1224 int (*lookup_fn)(struct bsdtar *, const char **, id_t), id_t id)
1226 struct name_cache *cache;
1231 if (*name_cache_variable == NULL) {
1232 *name_cache_variable = malloc(sizeof(struct name_cache));
1233 if (*name_cache_variable == NULL)
1234 bsdtar_errc(bsdtar, 1, ENOMEM, "No more memory");
1235 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1236 (*name_cache_variable)->size = name_cache_size;
1239 cache = *name_cache_variable;
1242 slot = id % cache->size;
1243 if (cache->cache[slot].name != NULL) {
1244 if (cache->cache[slot].id == id) {
1246 if (cache->cache[slot].name == NO_NAME)
1248 return (cache->cache[slot].name);
1250 if (cache->cache[slot].name != NO_NAME)
1251 free((void *)(uintptr_t)cache->cache[slot].name);
1252 cache->cache[slot].name = NULL;
1255 if (lookup_fn(bsdtar, &name, id) == 0) {
1256 if (name == NULL || name[0] == '\0') {
1257 /* Cache the negative response. */
1258 cache->cache[slot].name = NO_NAME;
1259 cache->cache[slot].id = id;
1261 cache->cache[slot].name = strdup(name);
1262 if (cache->cache[slot].name != NULL) {
1263 cache->cache[slot].id = id;
1264 return (cache->cache[slot].name);
1267 * Conveniently, NULL marks an empty slot, so
1268 * if the strdup() fails, we've just failed to
1269 * cache it. No recovery necessary.
1277 lookup_uname(struct bsdtar *bsdtar, uid_t uid)
1279 return (lookup_name(bsdtar, &bsdtar->uname_cache,
1280 &lookup_uname_helper, (id_t)uid));
1284 lookup_uname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1286 struct passwd *pwent;
1288 (void)bsdtar; /* UNUSED */
1291 pwent = getpwuid((uid_t)id);
1292 if (pwent == NULL) {
1295 bsdtar_warnc(bsdtar, errno, "getpwuid(%d) failed", id);
1299 *name = pwent->pw_name;
1304 lookup_gname(struct bsdtar *bsdtar, gid_t gid)
1306 return (lookup_name(bsdtar, &bsdtar->gname_cache,
1307 &lookup_gname_helper, (id_t)gid));
1311 lookup_gname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1313 struct group *grent;
1315 (void)bsdtar; /* UNUSED */
1318 grent = getgrgid((gid_t)id);
1319 if (grent == NULL) {
1322 bsdtar_warnc(bsdtar, errno, "getgrgid(%d) failed", id);
1326 *name = grent->gr_name;
1331 * Test if the specified file is new enough to include in the archive.
1334 new_enough(struct bsdtar *bsdtar, const char *path, const struct stat *st)
1336 struct archive_dir_entry *p;
1339 * If this file/dir is excluded by a time comparison, skip it.
1341 if (bsdtar->newer_ctime_sec > 0) {
1342 if (st->st_ctime < bsdtar->newer_ctime_sec)
1343 return (0); /* Too old, skip it. */
1344 if (st->st_ctime == bsdtar->newer_ctime_sec
1345 && ARCHIVE_STAT_CTIME_NANOS(st)
1346 <= bsdtar->newer_ctime_nsec)
1347 return (0); /* Too old, skip it. */
1349 if (bsdtar->newer_mtime_sec > 0) {
1350 if (st->st_mtime < bsdtar->newer_mtime_sec)
1351 return (0); /* Too old, skip it. */
1352 if (st->st_mtime == bsdtar->newer_mtime_sec
1353 && ARCHIVE_STAT_MTIME_NANOS(st)
1354 <= bsdtar->newer_mtime_nsec)
1355 return (0); /* Too old, skip it. */
1359 * In -u mode, we only write an entry if it's newer than
1360 * what was already in the archive.
1362 if (bsdtar->archive_dir != NULL &&
1363 bsdtar->archive_dir->head != NULL) {
1364 for (p = bsdtar->archive_dir->head; p != NULL; p = p->next) {
1365 if (pathcmp(path, p->name)==0)
1366 return (p->mtime_sec < st->st_mtime ||
1367 (p->mtime_sec == st->st_mtime &&
1369 < ARCHIVE_STAT_MTIME_NANOS(st)));
1373 /* If the file wasn't rejected, include it. */
1378 * Add an entry to the dir list for 'u' mode.
1380 * XXX TODO: Make this fast.
1383 add_dir_list(struct bsdtar *bsdtar, const char *path,
1384 time_t mtime_sec, int mtime_nsec)
1386 struct archive_dir_entry *p;
1389 * Search entire list to see if this file has appeared before.
1390 * If it has, override the timestamp data.
1392 p = bsdtar->archive_dir->head;
1394 if (strcmp(path, p->name)==0) {
1395 p->mtime_sec = mtime_sec;
1396 p->mtime_nsec = mtime_nsec;
1402 p = malloc(sizeof(*p));
1404 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1406 p->name = strdup(path);
1407 if (p->name == NULL)
1408 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1409 p->mtime_sec = mtime_sec;
1410 p->mtime_nsec = mtime_nsec;
1412 if (bsdtar->archive_dir->tail == NULL) {
1413 bsdtar->archive_dir->head = bsdtar->archive_dir->tail = p;
1415 bsdtar->archive_dir->tail->next = p;
1416 bsdtar->archive_dir->tail = p;
1421 test_for_append(struct bsdtar *bsdtar)
1425 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
1426 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
1427 if (bsdtar->filename == NULL)
1428 bsdtar_errc(bsdtar, 1, 0, "Cannot append to stdout.");
1430 if (bsdtar->create_compression != 0)
1431 bsdtar_errc(bsdtar, 1, 0,
1432 "Cannot append to %s with compression", bsdtar->filename);
1434 if (stat(bsdtar->filename, &s) != 0)
1437 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode))
1438 bsdtar_errc(bsdtar, 1, 0,
1439 "Cannot append to %s: not a regular file.",