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: src/usr.bin/tar/write.c,v 1.70 2008/05/26 17:10:10 kientzle Exp $");
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 /* Fixed size of uname/gname caches. */
83 #define name_cache_size 101
85 static const char * const NO_NAME = "(noname)";
87 struct archive_dir_entry {
88 struct archive_dir_entry *next;
95 struct archive_dir_entry *head, *tail;
105 } cache[name_cache_size];
108 static void add_dir_list(struct bsdtar *bsdtar, const char *path,
109 time_t mtime_sec, int mtime_nsec);
110 static int append_archive(struct bsdtar *, struct archive *,
111 struct archive *ina);
112 static int append_archive_filename(struct bsdtar *,
113 struct archive *, const char *fname);
114 static void archive_names_from_file(struct bsdtar *bsdtar,
116 static int archive_names_from_file_helper(struct bsdtar *bsdtar,
118 static int copy_file_data(struct bsdtar *bsdtar,
119 struct archive *a, struct archive *ina);
120 static void create_cleanup(struct bsdtar *);
121 static void free_cache(struct name_cache *cache);
122 static const char * lookup_gname(struct bsdtar *bsdtar, gid_t gid);
123 static int lookup_gname_helper(struct bsdtar *bsdtar,
124 const char **name, id_t gid);
125 static const char * lookup_uname(struct bsdtar *bsdtar, uid_t uid);
126 static int lookup_uname_helper(struct bsdtar *bsdtar,
127 const char **name, id_t uid);
128 static int new_enough(struct bsdtar *, const char *path,
129 const struct stat *);
130 static void setup_acls(struct bsdtar *, struct archive_entry *,
132 static void setup_xattrs(struct bsdtar *, struct archive_entry *,
134 static void test_for_append(struct bsdtar *);
135 static void write_archive(struct archive *, struct bsdtar *);
136 static void write_entry(struct bsdtar *, struct archive *,
137 const struct stat *, const char *pathname,
138 const char *accpath);
139 static void write_entry_backend(struct bsdtar *, struct archive *,
140 struct archive_entry *, int);
141 static int write_file_data(struct bsdtar *, struct archive *,
143 static void write_hierarchy(struct bsdtar *, struct archive *,
147 tar_mode_c(struct bsdtar *bsdtar)
152 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
153 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
155 /* We want to catch SIGINFO and SIGUSR1. */
156 siginfo_init(bsdtar);
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);
220 if (bsdtar->option_totals) {
221 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
222 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
225 archive_write_finish(a);
227 /* Restore old SIGINFO + SIGUSR1 handlers. */
228 siginfo_done(bsdtar);
232 * Same as 'c', except we only support tar or empty formats in
233 * uncompressed files on disk.
236 tar_mode_r(struct bsdtar *bsdtar)
241 struct archive_entry *entry;
244 /* Sanity-test some arguments and the file. */
245 test_for_append(bsdtar);
247 /* We want to catch SIGINFO and SIGUSR1. */
248 siginfo_init(bsdtar);
250 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
252 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT, 0666);
254 bsdtar_errc(bsdtar, 1, errno,
255 "Cannot open %s", bsdtar->filename);
257 a = archive_read_new();
258 archive_read_support_compression_all(a);
259 archive_read_support_format_tar(a);
260 archive_read_support_format_gnutar(a);
261 r = archive_read_open_fd(a, bsdtar->fd, 10240);
263 bsdtar_errc(bsdtar, 1, archive_errno(a),
264 "Can't read archive %s: %s", bsdtar->filename,
265 archive_error_string(a));
266 while (0 == archive_read_next_header(a, &entry)) {
267 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
268 archive_read_finish(a);
270 bsdtar_errc(bsdtar, 1, 0,
271 "Cannot append to compressed archive.");
273 /* Keep going until we hit end-of-archive */
274 format = archive_format(a);
277 end_offset = archive_read_header_position(a);
278 archive_read_finish(a);
280 /* Re-open archive for writing */
281 a = archive_write_new();
282 archive_write_set_compression_none(a);
284 * Set the format to be used for writing. To allow people to
285 * extend empty files, we need to allow them to specify the format,
286 * which opens the possibility that they will specify a format that
287 * doesn't match the existing format. Hence, the following bit
288 * of arcane ugliness.
291 if (bsdtar->create_format != NULL) {
292 /* If the user requested a format, use that, but ... */
293 archive_write_set_format_by_name(a,
294 bsdtar->create_format);
295 /* ... complain if it's not compatible. */
296 format &= ARCHIVE_FORMAT_BASE_MASK;
297 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK)
298 && format != ARCHIVE_FORMAT_EMPTY) {
299 bsdtar_errc(bsdtar, 1, 0,
300 "Format %s is incompatible with the archive %s.",
301 bsdtar->create_format, bsdtar->filename);
305 * Just preserve the current format, with a little care
306 * for formats that libarchive can't write.
308 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
309 /* TODO: When gtar supports pax, use pax restricted. */
310 format = ARCHIVE_FORMAT_TAR_USTAR;
311 if (format == ARCHIVE_FORMAT_EMPTY)
312 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
313 archive_write_set_format(a, format);
315 lseek(bsdtar->fd, end_offset, SEEK_SET); /* XXX check return val XXX */
316 archive_write_open_fd(a, bsdtar->fd); /* XXX check return val XXX */
318 write_archive(a, bsdtar); /* XXX check return val XXX */
320 if (bsdtar->option_totals) {
321 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
322 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
325 archive_write_finish(a);
331 tar_mode_u(struct bsdtar *bsdtar)
335 struct archive_entry *entry;
337 struct archive_dir_entry *p;
338 struct archive_dir archive_dir;
340 bsdtar->archive_dir = &archive_dir;
341 memset(&archive_dir, 0, sizeof(archive_dir));
343 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
345 /* Sanity-test some arguments and the file. */
346 test_for_append(bsdtar);
348 /* We want to catch SIGINFO and SIGUSR1. */
349 siginfo_init(bsdtar);
351 bsdtar->fd = open(bsdtar->filename, O_RDWR);
353 bsdtar_errc(bsdtar, 1, errno,
354 "Cannot open %s", bsdtar->filename);
356 a = archive_read_new();
357 archive_read_support_compression_all(a);
358 archive_read_support_format_tar(a);
359 archive_read_support_format_gnutar(a);
360 if (archive_read_open_fd(a, bsdtar->fd,
361 bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
362 DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
363 bsdtar_errc(bsdtar, 1, 0,
364 "Can't open %s: %s", bsdtar->filename,
365 archive_error_string(a));
368 /* Build a list of all entries and their recorded mod times. */
369 while (0 == archive_read_next_header(a, &entry)) {
370 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
371 archive_read_finish(a);
373 bsdtar_errc(bsdtar, 1, 0,
374 "Cannot append to compressed archive.");
376 add_dir_list(bsdtar, archive_entry_pathname(entry),
377 archive_entry_mtime(entry),
378 archive_entry_mtime_nsec(entry));
379 /* Record the last format determination we see */
380 format = archive_format(a);
381 /* Keep going until we hit end-of-archive */
384 end_offset = archive_read_header_position(a);
385 archive_read_finish(a);
387 /* Re-open archive for writing. */
388 a = archive_write_new();
389 archive_write_set_compression_none(a);
391 * Set format to same one auto-detected above, except that
392 * we don't write GNU tar format, so use ustar instead.
394 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
395 format = ARCHIVE_FORMAT_TAR_USTAR;
396 archive_write_set_format(a, format);
397 if (bsdtar->bytes_per_block != 0) {
398 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
399 archive_write_set_bytes_in_last_block(a,
400 bsdtar->bytes_per_block);
402 archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
403 lseek(bsdtar->fd, end_offset, SEEK_SET);
404 ftruncate(bsdtar->fd, end_offset);
405 archive_write_open_fd(a, bsdtar->fd);
407 write_archive(a, bsdtar);
409 if (bsdtar->option_totals) {
410 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
411 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
414 archive_write_finish(a);
418 while (bsdtar->archive_dir->head != NULL) {
419 p = bsdtar->archive_dir->head->next;
420 free(bsdtar->archive_dir->head->name);
421 free(bsdtar->archive_dir->head);
422 bsdtar->archive_dir->head = p;
424 bsdtar->archive_dir->tail = NULL;
429 * Write user-specified files/dirs to opened archive.
432 write_archive(struct archive *a, struct bsdtar *bsdtar)
435 struct archive_entry *entry, *sparse_entry;
437 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
438 bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver");
439 archive_entry_linkresolver_set_strategy(bsdtar->resolver,
442 if (bsdtar->names_from_file != NULL)
443 archive_names_from_file(bsdtar, a);
445 while (*bsdtar->argv) {
447 if (arg[0] == '-' && arg[1] == 'C') {
453 bsdtar_warnc(bsdtar, 1, 0,
454 "Missing argument for -C");
455 bsdtar->return_value = 1;
459 set_chdir(bsdtar, arg);
461 if (*arg != '/' && (arg[0] != '@' || arg[1] != '/'))
462 do_chdir(bsdtar); /* Handle a deferred -C */
464 if (append_archive_filename(bsdtar, a,
468 write_hierarchy(bsdtar, a, arg);
474 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
475 while (entry != NULL) {
477 write_entry_backend(bsdtar, a, entry, fd);
478 archive_entry_free(entry);
480 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
483 create_cleanup(bsdtar);
484 if (archive_write_close(a)) {
485 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
486 bsdtar->return_value = 1;
491 * Archive names specified in file.
493 * Unless --null was specified, a line containing exactly "-C" will
494 * cause the next line to be a directory to pass to chdir(). If
495 * --null is specified, then a line "-C" is just another filename.
498 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
502 bsdtar->next_line_is_dir = 0;
503 process_lines(bsdtar, bsdtar->names_from_file,
504 archive_names_from_file_helper);
505 if (bsdtar->next_line_is_dir)
506 bsdtar_errc(bsdtar, 1, errno,
507 "Unexpected end of filename list; "
508 "directory expected after -C");
512 archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
514 if (bsdtar->next_line_is_dir) {
515 set_chdir(bsdtar, line);
516 bsdtar->next_line_is_dir = 0;
517 } else if (!bsdtar->option_null && strcmp(line, "-C") == 0)
518 bsdtar->next_line_is_dir = 1;
521 do_chdir(bsdtar); /* Handle a deferred -C */
522 write_hierarchy(bsdtar, bsdtar->archive, line);
528 * Copy from specified archive to current archive. Returns non-zero
529 * for write errors (which force us to terminate the entire archiving
530 * operation). If there are errors reading the input archive, we set
531 * bsdtar->return_value but return zero, so the overall archiving
532 * operation will complete and return non-zero.
535 append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
536 const char *filename)
541 if (strcmp(filename, "-") == 0)
542 filename = NULL; /* Library uses NULL for stdio. */
544 ina = archive_read_new();
545 archive_read_support_format_all(ina);
546 archive_read_support_compression_all(ina);
547 if (archive_read_open_file(ina, filename, 10240)) {
548 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(ina));
549 bsdtar->return_value = 1;
553 rc = append_archive(bsdtar, a, ina);
555 if (archive_errno(ina)) {
556 bsdtar_warnc(bsdtar, 0, "Error reading archive %s: %s",
557 filename, archive_error_string(ina));
558 bsdtar->return_value = 1;
560 archive_read_finish(ina);
566 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
568 struct archive_entry *in_entry;
571 while (0 == archive_read_next_header(ina, &in_entry)) {
572 if (!new_enough(bsdtar, archive_entry_pathname(in_entry),
573 archive_entry_stat(in_entry)))
575 if (excluded(bsdtar, archive_entry_pathname(in_entry)))
577 if (bsdtar->option_interactive &&
578 !yes("copy '%s'", archive_entry_pathname(in_entry)))
581 safe_fprintf(stderr, "a %s",
582 archive_entry_pathname(in_entry));
583 siginfo_setinfo(bsdtar, "copying",
584 archive_entry_pathname(in_entry),
585 archive_entry_size(in_entry));
586 siginfo_printinfo(bsdtar, 0);
588 e = archive_write_header(a, in_entry);
589 if (e != ARCHIVE_OK) {
590 if (!bsdtar->verbose)
591 bsdtar_warnc(bsdtar, 0, "%s: %s",
592 archive_entry_pathname(in_entry),
593 archive_error_string(a));
595 fprintf(stderr, ": %s", archive_error_string(a));
597 if (e == ARCHIVE_FATAL)
600 if (e >= ARCHIVE_WARN) {
601 if (archive_entry_size(in_entry) == 0)
602 archive_read_data_skip(ina);
603 else if (copy_file_data(bsdtar, a, ina))
608 fprintf(stderr, "\n");
611 /* Note: If we got here, we saw no write errors, so return success. */
615 /* Helper function to copy data between archives. */
617 copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
621 ssize_t bytes_written;
624 bytes_read = archive_read_data(ina, buff, sizeof(buff));
625 while (bytes_read > 0) {
626 siginfo_printinfo(bsdtar, progress);
628 bytes_written = archive_write_data(a, buff, bytes_read);
629 if (bytes_written < bytes_read) {
630 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
633 progress += bytes_written;
634 bytes_read = archive_read_data(ina, buff, sizeof(buff));
641 * Add the file or dir hierarchy named by 'path' to the archive
644 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
647 char symlink_mode = bsdtar->symlink_mode;
649 int dev_recorded = 0;
653 unsigned long fflags;
656 tree = tree_open(path);
659 bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path);
660 bsdtar->return_value = 1;
664 while ((tree_ret = tree_next(tree))) {
665 const char *name = tree_current_path(tree);
666 const struct stat *st = NULL, *lst = NULL;
669 if (tree_ret == TREE_ERROR_DIR)
670 bsdtar_warnc(bsdtar, errno, "%s: Couldn't visit directory", name);
671 if (tree_ret != TREE_REGULAR)
673 lst = tree_current_lstat(tree);
675 /* Couldn't lstat(); must not exist. */
676 bsdtar_warnc(bsdtar, errno, "%s: Cannot stat", name);
679 * Report an error via the exit code if the failed
680 * path is a prefix of what the user provided via
681 * the command line. (Testing for string equality
682 * here won't work due to trailing '/' characters.)
684 if (memcmp(name, path, strlen(name)) == 0)
685 bsdtar->return_value = 1;
689 if (S_ISLNK(lst->st_mode))
690 st = tree_current_stat(tree);
691 /* Default: descend into any dir or symlink to dir. */
692 /* We'll adjust this later on. */
694 if ((st != NULL) && S_ISDIR(st->st_mode))
696 if ((lst != NULL) && S_ISDIR(lst->st_mode))
700 * If user has asked us not to cross mount points,
701 * then don't descend into into a dir on a different
705 first_dev = lst->st_dev;
708 if (bsdtar->option_dont_traverse_mounts) {
709 if (lst != NULL && lst->st_dev != first_dev)
714 * If this file/dir is flagged "nodump" and we're
715 * honoring such flags, skip this file/dir.
718 if (bsdtar->option_honor_nodump &&
719 (lst->st_flags & UF_NODUMP))
725 * Linux has a nodump flag too but to read it
726 * we have to open() the file/dir and do an ioctl on it...
728 if (bsdtar->option_honor_nodump &&
729 ((fd = open(name, O_RDONLY|O_NONBLOCK)) >= 0) &&
730 ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags)),
731 close(fd), r) >= 0 &&
732 (fflags & EXT2_NODUMP_FL))
737 * If this file/dir is excluded by a filename
740 if (excluded(bsdtar, name))
744 * If the user vetoes this file/directory, skip it.
746 if (bsdtar->option_interactive &&
747 !yes("add '%s'", name))
751 * If this is a dir, decide whether or not to recurse.
753 if (bsdtar->option_no_subdirs)
757 * Distinguish 'L'/'P'/'H' symlink following.
759 switch(symlink_mode) {
761 /* 'H': After the first item, rest like 'P'. */
763 /* 'H': First item (from command line) like 'L'. */
766 /* 'L': Do descend through a symlink to dir. */
767 /* 'L': Archive symlink to file as file. */
768 lst = tree_current_stat(tree);
769 /* If stat fails, we have a broken symlink;
770 * in that case, archive the link as such. */
772 lst = tree_current_lstat(tree);
775 /* 'P': Don't descend through a symlink to dir. */
776 if (!S_ISDIR(lst->st_mode))
778 /* 'P': Archive symlink to file as symlink. */
779 /* lst = tree_current_lstat(tree); */
787 * Write the entry. Note that write_entry() handles
788 * pathname editing and newness testing.
790 write_entry(bsdtar, a, lst, name,
791 tree_current_access_path(tree));
797 * Backend for write_entry.
800 write_entry_backend(struct bsdtar *bsdtar, struct archive *a,
801 struct archive_entry *entry, int fd)
805 if (fd == -1 && archive_entry_size(entry) > 0) {
806 const char *pathname = archive_entry_sourcepath(entry);
807 fd = open(pathname, O_RDONLY);
809 if (!bsdtar->verbose)
810 bsdtar_warnc(bsdtar, errno,
811 "%s: could not open file", pathname);
813 fprintf(stderr, ": %s", strerror(errno));
818 e = archive_write_header(a, entry);
819 if (e != ARCHIVE_OK) {
820 if (!bsdtar->verbose)
821 bsdtar_warnc(bsdtar, 0, "%s: %s",
822 archive_entry_pathname(entry),
823 archive_error_string(a));
825 fprintf(stderr, ": %s", archive_error_string(a));
828 if (e == ARCHIVE_FATAL)
832 * If we opened a file earlier, write it out now. Note that
833 * the format handler might have reset the size field to zero
834 * to inform us that the archive body won't get stored. In
835 * that case, just skip the write.
837 if (e >= ARCHIVE_WARN && fd >= 0 && archive_entry_size(entry) > 0) {
838 if (write_file_data(bsdtar, a, fd))
845 * Add a single filesystem object to the archive.
848 write_entry(struct bsdtar *bsdtar, struct archive *a, const struct stat *st,
849 const char *pathname, const char *accpath)
851 struct archive_entry *entry, *sparse_entry;
855 unsigned long stflags;
857 static char linkbuffer[PATH_MAX+1];
860 entry = archive_entry_new();
862 archive_entry_set_pathname(entry, pathname);
863 archive_entry_copy_sourcepath(entry, accpath);
866 * Rewrite the pathname to be archived. If rewrite
867 * fails, skip the entry.
869 if (edit_pathname(bsdtar, entry))
873 * In -u mode, check that the file is newer than what's
874 * already in the archive; in all modes, obey --newerXXX flags.
876 if (!new_enough(bsdtar, archive_entry_pathname(entry), st))
879 /* Display entry as we process it. This format is required by SUSv2. */
881 safe_fprintf(stderr, "a %s", archive_entry_pathname(entry));
883 /* Read symbolic link information. */
884 if ((st->st_mode & S_IFMT) == S_IFLNK) {
887 lnklen = readlink(accpath, linkbuffer, PATH_MAX);
889 if (!bsdtar->verbose)
890 bsdtar_warnc(bsdtar, errno,
891 "%s: Couldn't read symbolic link",
895 ": Couldn't read symbolic link: %s",
899 linkbuffer[lnklen] = 0;
900 archive_entry_set_symlink(entry, linkbuffer);
903 /* Look up username and group name. */
904 archive_entry_set_uname(entry, lookup_uname(bsdtar, st->st_uid));
905 archive_entry_set_gname(entry, lookup_gname(bsdtar, st->st_gid));
908 if (st->st_flags != 0)
909 archive_entry_set_fflags(entry, st->st_flags, 0);
913 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode)) &&
914 ((fd = open(accpath, O_RDONLY|O_NONBLOCK)) >= 0) &&
915 ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags)), close(fd), (fd = -1), r) >= 0 &&
917 archive_entry_set_fflags(entry, stflags, 0);
921 archive_entry_copy_stat(entry, st);
922 setup_acls(bsdtar, entry, accpath);
923 setup_xattrs(bsdtar, entry, accpath);
925 /* Non-regular files get archived with zero size. */
926 if (!S_ISREG(st->st_mode))
927 archive_entry_set_size(entry, 0);
929 /* Record what we're doing, for the benefit of SIGINFO / SIGUSR1. */
930 siginfo_setinfo(bsdtar, "adding", archive_entry_pathname(entry),
931 archive_entry_size(entry));
932 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
934 /* Handle SIGINFO / SIGUSR1 request if one was made. */
935 siginfo_printinfo(bsdtar, 0);
937 while (entry != NULL) {
938 write_entry_backend(bsdtar, a, entry, fd);
940 archive_entry_free(entry);
941 entry = sparse_entry;
947 fprintf(stderr, "\n");
953 archive_entry_free(entry);
957 /* Helper function to copy file to archive, with stack-allocated buffer. */
959 write_file_data(struct bsdtar *bsdtar, struct archive *a, int fd)
963 ssize_t bytes_written;
966 /* XXX TODO: Allocate buffer on heap and store pointer to
967 * it in bsdtar structure; arrange cleanup as well. XXX */
969 bytes_read = read(fd, buff, sizeof(buff));
970 while (bytes_read > 0) {
971 siginfo_printinfo(bsdtar, progress);
973 bytes_written = archive_write_data(a, buff, bytes_read);
974 if (bytes_written < 0) {
975 /* Write failed; this is bad */
976 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
979 if (bytes_written < bytes_read) {
980 /* Write was truncated; warn but continue. */
981 bsdtar_warnc(bsdtar, 0,
982 "Truncated write; file may have grown while being archived.");
985 progress += bytes_written;
986 bytes_read = read(fd, buff, sizeof(buff));
993 create_cleanup(struct bsdtar *bsdtar)
995 free_cache(bsdtar->uname_cache);
996 bsdtar->uname_cache = NULL;
997 free_cache(bsdtar->gname_cache);
998 bsdtar->gname_cache = NULL;
1001 #ifdef HAVE_POSIX_ACL
1002 static void setup_acl(struct bsdtar *bsdtar,
1003 struct archive_entry *entry, const char *accpath,
1004 int acl_type, int archive_entry_acl_type);
1007 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1008 const char *accpath)
1010 archive_entry_acl_clear(entry);
1012 setup_acl(bsdtar, entry, accpath,
1013 ACL_TYPE_ACCESS, ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
1014 /* Only directories can have default ACLs. */
1015 if (S_ISDIR(archive_entry_mode(entry)))
1016 setup_acl(bsdtar, entry, accpath,
1017 ACL_TYPE_DEFAULT, ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
1021 setup_acl(struct bsdtar *bsdtar, struct archive_entry *entry,
1022 const char *accpath, int acl_type, int archive_entry_acl_type)
1026 acl_entry_t acl_entry;
1027 acl_permset_t acl_permset;
1028 int s, ae_id, ae_tag, ae_perm;
1029 const char *ae_name;
1031 /* Retrieve access ACL from file. */
1032 acl = acl_get_file(accpath, acl_type);
1034 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
1039 acl_get_tag_type(acl_entry, &acl_tag);
1040 if (acl_tag == ACL_USER) {
1041 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
1042 ae_name = lookup_uname(bsdtar, ae_id);
1043 ae_tag = ARCHIVE_ENTRY_ACL_USER;
1044 } else if (acl_tag == ACL_GROUP) {
1045 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
1046 ae_name = lookup_gname(bsdtar, ae_id);
1047 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
1048 } else if (acl_tag == ACL_MASK) {
1049 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
1050 } else if (acl_tag == ACL_USER_OBJ) {
1051 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
1052 } else if (acl_tag == ACL_GROUP_OBJ) {
1053 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
1054 } else if (acl_tag == ACL_OTHER) {
1055 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
1057 /* Skip types that libarchive can't support. */
1061 acl_get_permset(acl_entry, &acl_permset);
1064 * acl_get_perm() is spelled differently on different
1065 * platforms; see bsdtar_platform.h for details.
1067 if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
1068 ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
1069 if (ACL_GET_PERM(acl_permset, ACL_READ))
1070 ae_perm |= ARCHIVE_ENTRY_ACL_READ;
1071 if (ACL_GET_PERM(acl_permset, ACL_WRITE))
1072 ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
1074 archive_entry_acl_add_entry(entry,
1075 archive_entry_acl_type, ae_perm, ae_tag,
1078 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
1085 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1086 const char *accpath)
1094 #if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
1097 setup_xattr(struct bsdtar *bsdtar, struct archive_entry *entry,
1098 const char *accpath, const char *name)
1102 char symlink_mode = bsdtar->symlink_mode;
1104 if (symlink_mode == 'H')
1105 size = getxattr(accpath, name, NULL, 0);
1107 size = lgetxattr(accpath, name, NULL, 0);
1110 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1114 if (size > 0 && (value = malloc(size)) == NULL) {
1115 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1119 if (symlink_mode == 'H')
1120 size = getxattr(accpath, name, value, size);
1122 size = lgetxattr(accpath, name, value, size);
1125 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1129 archive_entry_xattr_add_entry(entry, name, value, size);
1135 * Linux extended attribute support
1138 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1139 const char *accpath)
1143 char symlink_mode = bsdtar->symlink_mode;
1145 if (symlink_mode == 'H')
1146 list_size = listxattr(accpath, NULL, 0);
1148 list_size = llistxattr(accpath, NULL, 0);
1150 if (list_size == -1) {
1151 bsdtar_warnc(bsdtar, errno,
1152 "Couldn't list extended attributes");
1154 } else if (list_size == 0)
1157 if ((list = malloc(list_size)) == NULL) {
1158 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1162 if (symlink_mode == 'H')
1163 list_size = listxattr(accpath, list, list_size);
1165 list_size = llistxattr(accpath, list, list_size);
1167 if (list_size == -1) {
1168 bsdtar_warnc(bsdtar, errno,
1169 "Couldn't list extended attributes");
1174 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
1175 if (strncmp(p, "system.", 7) == 0 ||
1176 strncmp(p, "xfsroot.", 8) == 0)
1179 setup_xattr(bsdtar, entry, accpath, p);
1188 * Generic (stub) extended attribute support.
1191 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1192 const char *accpath)
1194 (void)bsdtar; /* UNUSED */
1195 (void)entry; /* UNUSED */
1196 (void)accpath; /* UNUSED */
1202 free_cache(struct name_cache *cache)
1206 if (cache != NULL) {
1207 for (i = 0; i < cache->size; i++) {
1208 if (cache->cache[i].name != NULL &&
1209 cache->cache[i].name != NO_NAME)
1210 free((void *)(uintptr_t)cache->cache[i].name);
1217 * Lookup uid/gid from uname/gname, return NULL if no match.
1220 lookup_name(struct bsdtar *bsdtar, struct name_cache **name_cache_variable,
1221 int (*lookup_fn)(struct bsdtar *, const char **, id_t), id_t id)
1223 struct name_cache *cache;
1228 if (*name_cache_variable == NULL) {
1229 *name_cache_variable = malloc(sizeof(struct name_cache));
1230 if (*name_cache_variable == NULL)
1231 bsdtar_errc(bsdtar, 1, ENOMEM, "No more memory");
1232 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1233 (*name_cache_variable)->size = name_cache_size;
1236 cache = *name_cache_variable;
1239 slot = id % cache->size;
1240 if (cache->cache[slot].name != NULL) {
1241 if (cache->cache[slot].id == id) {
1243 if (cache->cache[slot].name == NO_NAME)
1245 return (cache->cache[slot].name);
1247 if (cache->cache[slot].name != NO_NAME)
1248 free((void *)(uintptr_t)cache->cache[slot].name);
1249 cache->cache[slot].name = NULL;
1252 if (lookup_fn(bsdtar, &name, id) == 0) {
1253 if (name == NULL || name[0] == '\0') {
1254 /* Cache the negative response. */
1255 cache->cache[slot].name = NO_NAME;
1256 cache->cache[slot].id = id;
1258 cache->cache[slot].name = strdup(name);
1259 if (cache->cache[slot].name != NULL) {
1260 cache->cache[slot].id = id;
1261 return (cache->cache[slot].name);
1264 * Conveniently, NULL marks an empty slot, so
1265 * if the strdup() fails, we've just failed to
1266 * cache it. No recovery necessary.
1274 lookup_uname(struct bsdtar *bsdtar, uid_t uid)
1276 return (lookup_name(bsdtar, &bsdtar->uname_cache,
1277 &lookup_uname_helper, (id_t)uid));
1281 lookup_uname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1283 struct passwd *pwent;
1285 (void)bsdtar; /* UNUSED */
1288 pwent = getpwuid((uid_t)id);
1289 if (pwent == NULL) {
1292 bsdtar_warnc(bsdtar, errno, "getpwuid(%d) failed", id);
1296 *name = pwent->pw_name;
1301 lookup_gname(struct bsdtar *bsdtar, gid_t gid)
1303 return (lookup_name(bsdtar, &bsdtar->gname_cache,
1304 &lookup_gname_helper, (id_t)gid));
1308 lookup_gname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1310 struct group *grent;
1312 (void)bsdtar; /* UNUSED */
1315 grent = getgrgid((gid_t)id);
1316 if (grent == NULL) {
1319 bsdtar_warnc(bsdtar, errno, "getgrgid(%d) failed", id);
1323 *name = grent->gr_name;
1328 * Test if the specified file is new enough to include in the archive.
1331 new_enough(struct bsdtar *bsdtar, const char *path, const struct stat *st)
1333 struct archive_dir_entry *p;
1336 * If this file/dir is excluded by a time comparison, skip it.
1338 if (bsdtar->newer_ctime_sec > 0) {
1339 if (st->st_ctime < bsdtar->newer_ctime_sec)
1340 return (0); /* Too old, skip it. */
1341 if (st->st_ctime == bsdtar->newer_ctime_sec
1342 && ARCHIVE_STAT_CTIME_NANOS(st)
1343 <= bsdtar->newer_ctime_nsec)
1344 return (0); /* Too old, skip it. */
1346 if (bsdtar->newer_mtime_sec > 0) {
1347 if (st->st_mtime < bsdtar->newer_mtime_sec)
1348 return (0); /* Too old, skip it. */
1349 if (st->st_mtime == bsdtar->newer_mtime_sec
1350 && ARCHIVE_STAT_MTIME_NANOS(st)
1351 <= bsdtar->newer_mtime_nsec)
1352 return (0); /* Too old, skip it. */
1356 * In -u mode, we only write an entry if it's newer than
1357 * what was already in the archive.
1359 if (bsdtar->archive_dir != NULL &&
1360 bsdtar->archive_dir->head != NULL) {
1361 for (p = bsdtar->archive_dir->head; p != NULL; p = p->next) {
1362 if (pathcmp(path, p->name)==0)
1363 return (p->mtime_sec < st->st_mtime ||
1364 (p->mtime_sec == st->st_mtime &&
1366 < ARCHIVE_STAT_MTIME_NANOS(st)));
1370 /* If the file wasn't rejected, include it. */
1375 * Add an entry to the dir list for 'u' mode.
1377 * XXX TODO: Make this fast.
1380 add_dir_list(struct bsdtar *bsdtar, const char *path,
1381 time_t mtime_sec, int mtime_nsec)
1383 struct archive_dir_entry *p;
1386 * Search entire list to see if this file has appeared before.
1387 * If it has, override the timestamp data.
1389 p = bsdtar->archive_dir->head;
1391 if (strcmp(path, p->name)==0) {
1392 p->mtime_sec = mtime_sec;
1393 p->mtime_nsec = mtime_nsec;
1399 p = malloc(sizeof(*p));
1401 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1403 p->name = strdup(path);
1404 if (p->name == NULL)
1405 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1406 p->mtime_sec = mtime_sec;
1407 p->mtime_nsec = mtime_nsec;
1409 if (bsdtar->archive_dir->tail == NULL) {
1410 bsdtar->archive_dir->head = bsdtar->archive_dir->tail = p;
1412 bsdtar->archive_dir->tail->next = p;
1413 bsdtar->archive_dir->tail = p;
1418 test_for_append(struct bsdtar *bsdtar)
1422 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
1423 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
1424 if (bsdtar->filename == NULL)
1425 bsdtar_errc(bsdtar, 1, 0, "Cannot append to stdout.");
1427 if (bsdtar->create_compression != 0)
1428 bsdtar_errc(bsdtar, 1, 0,
1429 "Cannot append to %s with compression", bsdtar->filename);
1431 if (stat(bsdtar->filename, &s) != 0)
1434 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode))
1435 bsdtar_errc(bsdtar, 1, 0,
1436 "Cannot append to %s: not a regular file.",