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>
59 #ifdef HAVE_LINUX_FS_H
60 #include <linux/fs.h> /* for Linux file flags */
62 #ifdef HAVE_LINUX_EXT2_FS_H
63 #include <linux/ext2_fs.h> /* for Linux file flags */
65 #ifdef HAVE_EXT2FS_EXT2_FS_H
67 * This must be after the include of linux/ext2_fs.h,
68 * otherwise the former will fail.
70 #include <ext2fs/ext2_fs.h> /* for Linux file flags */
89 /* Fixed size of uname/gname caches. */
90 #define name_cache_size 101
92 static const char * const NO_NAME = "(noname)";
94 struct archive_dir_entry {
95 struct archive_dir_entry *next;
102 struct archive_dir_entry *head, *tail;
112 } cache[name_cache_size];
115 static void add_dir_list(struct bsdtar *bsdtar, const char *path,
116 time_t mtime_sec, int mtime_nsec);
117 static int append_archive(struct bsdtar *, struct archive *,
118 struct archive *ina);
119 static int append_archive_filename(struct bsdtar *,
120 struct archive *, const char *fname);
121 static void archive_names_from_file(struct bsdtar *bsdtar,
123 static int archive_names_from_file_helper(struct bsdtar *bsdtar,
125 static int copy_file_data(struct bsdtar *bsdtar,
126 struct archive *a, struct archive *ina);
127 static void create_cleanup(struct bsdtar *);
128 static void free_cache(struct name_cache *cache);
129 static const char * lookup_gname(struct bsdtar *bsdtar, gid_t gid);
130 static int lookup_gname_helper(struct bsdtar *bsdtar,
131 const char **name, id_t gid);
132 static const char * lookup_uname(struct bsdtar *bsdtar, uid_t uid);
133 static int lookup_uname_helper(struct bsdtar *bsdtar,
134 const char **name, id_t uid);
135 static int new_enough(struct bsdtar *, const char *path,
136 const struct stat *);
137 static void setup_acls(struct bsdtar *, struct archive_entry *,
139 static void setup_xattrs(struct bsdtar *, struct archive_entry *,
141 static void test_for_append(struct bsdtar *);
142 static void write_archive(struct archive *, struct bsdtar *);
143 static void write_entry(struct bsdtar *, struct archive *,
144 const struct stat *, const char *pathname,
145 const char *accpath);
146 static void write_entry_backend(struct bsdtar *, struct archive *,
147 struct archive_entry *, int);
148 static int write_file_data(struct bsdtar *, struct archive *,
150 static void write_hierarchy(struct bsdtar *, struct archive *,
154 tar_mode_c(struct bsdtar *bsdtar)
159 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
160 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
162 /* We want to catch SIGINFO and SIGUSR1. */
163 siginfo_init(bsdtar);
165 a = archive_write_new();
167 /* Support any format that the library supports. */
168 if (bsdtar->create_format == NULL) {
169 r = archive_write_set_format_pax_restricted(a);
170 bsdtar->create_format = "pax restricted";
172 r = archive_write_set_format_by_name(a, bsdtar->create_format);
174 if (r != ARCHIVE_OK) {
175 fprintf(stderr, "Can't use format %s: %s\n",
176 bsdtar->create_format,
177 archive_error_string(a));
182 * If user explicitly set the block size, then assume they
183 * want the last block padded as well. Otherwise, use the
184 * default block size and accept archive_write_open_file()'s
185 * default padding decisions.
187 if (bsdtar->bytes_per_block != 0) {
188 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
189 archive_write_set_bytes_in_last_block(a,
190 bsdtar->bytes_per_block);
192 archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
194 if (bsdtar->compress_program) {
195 archive_write_set_compression_program(a, bsdtar->compress_program);
197 switch (bsdtar->create_compression) {
199 archive_write_set_compression_none(a);
203 archive_write_set_compression_bzip2(a);
208 archive_write_set_compression_gzip(a);
212 archive_write_set_compression_compress(a);
215 bsdtar_errc(bsdtar, 1, 0,
216 "Unrecognized compression option -%c",
217 bsdtar->create_compression);
221 r = archive_write_open_file(a, bsdtar->filename);
223 bsdtar_errc(bsdtar, 1, 0, archive_error_string(a));
225 write_archive(a, bsdtar);
227 if (bsdtar->option_totals) {
228 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
229 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
232 archive_write_finish(a);
234 /* Restore old SIGINFO + SIGUSR1 handlers. */
235 siginfo_done(bsdtar);
239 * Same as 'c', except we only support tar or empty formats in
240 * uncompressed files on disk.
243 tar_mode_r(struct bsdtar *bsdtar)
248 struct archive_entry *entry;
251 /* Sanity-test some arguments and the file. */
252 test_for_append(bsdtar);
254 /* We want to catch SIGINFO and SIGUSR1. */
255 siginfo_init(bsdtar);
257 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
259 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT, 0666);
261 bsdtar_errc(bsdtar, 1, errno,
262 "Cannot open %s", bsdtar->filename);
264 a = archive_read_new();
265 archive_read_support_compression_all(a);
266 archive_read_support_format_tar(a);
267 archive_read_support_format_gnutar(a);
268 r = archive_read_open_fd(a, bsdtar->fd, 10240);
270 bsdtar_errc(bsdtar, 1, archive_errno(a),
271 "Can't read archive %s: %s", bsdtar->filename,
272 archive_error_string(a));
273 while (0 == archive_read_next_header(a, &entry)) {
274 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
275 archive_read_finish(a);
277 bsdtar_errc(bsdtar, 1, 0,
278 "Cannot append to compressed archive.");
280 /* Keep going until we hit end-of-archive */
281 format = archive_format(a);
284 end_offset = archive_read_header_position(a);
285 archive_read_finish(a);
287 /* Re-open archive for writing */
288 a = archive_write_new();
289 archive_write_set_compression_none(a);
291 * Set the format to be used for writing. To allow people to
292 * extend empty files, we need to allow them to specify the format,
293 * which opens the possibility that they will specify a format that
294 * doesn't match the existing format. Hence, the following bit
295 * of arcane ugliness.
298 if (bsdtar->create_format != NULL) {
299 /* If the user requested a format, use that, but ... */
300 archive_write_set_format_by_name(a,
301 bsdtar->create_format);
302 /* ... complain if it's not compatible. */
303 format &= ARCHIVE_FORMAT_BASE_MASK;
304 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK)
305 && format != ARCHIVE_FORMAT_EMPTY) {
306 bsdtar_errc(bsdtar, 1, 0,
307 "Format %s is incompatible with the archive %s.",
308 bsdtar->create_format, bsdtar->filename);
312 * Just preserve the current format, with a little care
313 * for formats that libarchive can't write.
315 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
316 /* TODO: When gtar supports pax, use pax restricted. */
317 format = ARCHIVE_FORMAT_TAR_USTAR;
318 if (format == ARCHIVE_FORMAT_EMPTY)
319 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
320 archive_write_set_format(a, format);
322 lseek(bsdtar->fd, end_offset, SEEK_SET); /* XXX check return val XXX */
323 archive_write_open_fd(a, bsdtar->fd); /* XXX check return val XXX */
325 write_archive(a, bsdtar); /* XXX check return val XXX */
327 if (bsdtar->option_totals) {
328 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
329 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
332 archive_write_finish(a);
338 tar_mode_u(struct bsdtar *bsdtar)
342 struct archive_entry *entry;
344 struct archive_dir_entry *p;
345 struct archive_dir archive_dir;
347 bsdtar->archive_dir = &archive_dir;
348 memset(&archive_dir, 0, sizeof(archive_dir));
350 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
352 /* Sanity-test some arguments and the file. */
353 test_for_append(bsdtar);
355 /* We want to catch SIGINFO and SIGUSR1. */
356 siginfo_init(bsdtar);
358 bsdtar->fd = open(bsdtar->filename, O_RDWR);
360 bsdtar_errc(bsdtar, 1, errno,
361 "Cannot open %s", bsdtar->filename);
363 a = archive_read_new();
364 archive_read_support_compression_all(a);
365 archive_read_support_format_tar(a);
366 archive_read_support_format_gnutar(a);
367 if (archive_read_open_fd(a, bsdtar->fd,
368 bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
369 DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
370 bsdtar_errc(bsdtar, 1, 0,
371 "Can't open %s: %s", bsdtar->filename,
372 archive_error_string(a));
375 /* Build a list of all entries and their recorded mod times. */
376 while (0 == archive_read_next_header(a, &entry)) {
377 if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
378 archive_read_finish(a);
380 bsdtar_errc(bsdtar, 1, 0,
381 "Cannot append to compressed archive.");
383 add_dir_list(bsdtar, archive_entry_pathname(entry),
384 archive_entry_mtime(entry),
385 archive_entry_mtime_nsec(entry));
386 /* Record the last format determination we see */
387 format = archive_format(a);
388 /* Keep going until we hit end-of-archive */
391 end_offset = archive_read_header_position(a);
392 archive_read_finish(a);
394 /* Re-open archive for writing. */
395 a = archive_write_new();
396 archive_write_set_compression_none(a);
398 * Set format to same one auto-detected above, except that
399 * we don't write GNU tar format, so use ustar instead.
401 if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
402 format = ARCHIVE_FORMAT_TAR_USTAR;
403 archive_write_set_format(a, format);
404 if (bsdtar->bytes_per_block != 0) {
405 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
406 archive_write_set_bytes_in_last_block(a,
407 bsdtar->bytes_per_block);
409 archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
410 lseek(bsdtar->fd, end_offset, SEEK_SET);
411 ftruncate(bsdtar->fd, end_offset);
412 archive_write_open_fd(a, bsdtar->fd);
414 write_archive(a, bsdtar);
416 if (bsdtar->option_totals) {
417 fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
418 (BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
421 archive_write_finish(a);
425 while (bsdtar->archive_dir->head != NULL) {
426 p = bsdtar->archive_dir->head->next;
427 free(bsdtar->archive_dir->head->name);
428 free(bsdtar->archive_dir->head);
429 bsdtar->archive_dir->head = p;
431 bsdtar->archive_dir->tail = NULL;
436 * Write user-specified files/dirs to opened archive.
439 write_archive(struct archive *a, struct bsdtar *bsdtar)
442 struct archive_entry *entry, *sparse_entry;
444 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
445 bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver");
446 archive_entry_linkresolver_set_strategy(bsdtar->resolver,
449 if (bsdtar->names_from_file != NULL)
450 archive_names_from_file(bsdtar, a);
452 while (*bsdtar->argv) {
454 if (arg[0] == '-' && arg[1] == 'C') {
460 bsdtar_warnc(bsdtar, 1, 0,
461 "Missing argument for -C");
462 bsdtar->return_value = 1;
466 set_chdir(bsdtar, arg);
468 if (*arg != '/' && (arg[0] != '@' || arg[1] != '/'))
469 do_chdir(bsdtar); /* Handle a deferred -C */
471 if (append_archive_filename(bsdtar, a,
475 write_hierarchy(bsdtar, a, arg);
481 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
482 while (entry != NULL) {
484 write_entry_backend(bsdtar, a, entry, fd);
485 archive_entry_free(entry);
487 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
490 create_cleanup(bsdtar);
491 if (archive_write_close(a)) {
492 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
493 bsdtar->return_value = 1;
498 * Archive names specified in file.
500 * Unless --null was specified, a line containing exactly "-C" will
501 * cause the next line to be a directory to pass to chdir(). If
502 * --null is specified, then a line "-C" is just another filename.
505 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
509 bsdtar->next_line_is_dir = 0;
510 process_lines(bsdtar, bsdtar->names_from_file,
511 archive_names_from_file_helper);
512 if (bsdtar->next_line_is_dir)
513 bsdtar_errc(bsdtar, 1, errno,
514 "Unexpected end of filename list; "
515 "directory expected after -C");
519 archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
521 if (bsdtar->next_line_is_dir) {
522 set_chdir(bsdtar, line);
523 bsdtar->next_line_is_dir = 0;
524 } else if (!bsdtar->option_null && strcmp(line, "-C") == 0)
525 bsdtar->next_line_is_dir = 1;
528 do_chdir(bsdtar); /* Handle a deferred -C */
529 write_hierarchy(bsdtar, bsdtar->archive, line);
535 * Copy from specified archive to current archive. Returns non-zero
536 * for write errors (which force us to terminate the entire archiving
537 * operation). If there are errors reading the input archive, we set
538 * bsdtar->return_value but return zero, so the overall archiving
539 * operation will complete and return non-zero.
542 append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
543 const char *filename)
548 if (strcmp(filename, "-") == 0)
549 filename = NULL; /* Library uses NULL for stdio. */
551 ina = archive_read_new();
552 archive_read_support_format_all(ina);
553 archive_read_support_compression_all(ina);
554 if (archive_read_open_file(ina, filename, 10240)) {
555 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(ina));
556 bsdtar->return_value = 1;
560 rc = append_archive(bsdtar, a, ina);
562 if (archive_errno(ina)) {
563 bsdtar_warnc(bsdtar, 0, "Error reading archive %s: %s",
564 filename, archive_error_string(ina));
565 bsdtar->return_value = 1;
567 archive_read_finish(ina);
573 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
575 struct archive_entry *in_entry;
578 while (0 == archive_read_next_header(ina, &in_entry)) {
579 if (!new_enough(bsdtar, archive_entry_pathname(in_entry),
580 archive_entry_stat(in_entry)))
582 if (excluded(bsdtar, archive_entry_pathname(in_entry)))
584 if (bsdtar->option_interactive &&
585 !yes("copy '%s'", archive_entry_pathname(in_entry)))
588 safe_fprintf(stderr, "a %s",
589 archive_entry_pathname(in_entry));
590 siginfo_setinfo(bsdtar, "copying",
591 archive_entry_pathname(in_entry),
592 archive_entry_size(in_entry));
593 siginfo_printinfo(bsdtar, 0);
595 e = archive_write_header(a, in_entry);
596 if (e != ARCHIVE_OK) {
597 if (!bsdtar->verbose)
598 bsdtar_warnc(bsdtar, 0, "%s: %s",
599 archive_entry_pathname(in_entry),
600 archive_error_string(a));
602 fprintf(stderr, ": %s", archive_error_string(a));
604 if (e == ARCHIVE_FATAL)
607 if (e >= ARCHIVE_WARN) {
608 if (archive_entry_size(in_entry) == 0)
609 archive_read_data_skip(ina);
610 else if (copy_file_data(bsdtar, a, ina))
615 fprintf(stderr, "\n");
618 /* Note: If we got here, we saw no write errors, so return success. */
622 /* Helper function to copy data between archives. */
624 copy_file_data(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
628 ssize_t bytes_written;
631 bytes_read = archive_read_data(ina, buff, sizeof(buff));
632 while (bytes_read > 0) {
633 siginfo_printinfo(bsdtar, progress);
635 bytes_written = archive_write_data(a, buff, bytes_read);
636 if (bytes_written < bytes_read) {
637 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
640 progress += bytes_written;
641 bytes_read = archive_read_data(ina, buff, sizeof(buff));
648 * Add the file or dir hierarchy named by 'path' to the archive
651 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
654 char symlink_mode = bsdtar->symlink_mode;
656 int dev_recorded = 0;
658 #ifdef HAVE_EXT2FS_EXT2_FS_H
660 unsigned long fflags;
663 tree = tree_open(path);
666 bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path);
667 bsdtar->return_value = 1;
671 while ((tree_ret = tree_next(tree))) {
672 const char *name = tree_current_path(tree);
673 const struct stat *st = NULL, *lst = NULL;
676 if (tree_ret == TREE_ERROR_DIR)
677 bsdtar_warnc(bsdtar, errno, "%s: Couldn't visit directory", name);
678 if (tree_ret != TREE_REGULAR)
680 lst = tree_current_lstat(tree);
682 /* Couldn't lstat(); must not exist. */
683 bsdtar_warnc(bsdtar, errno, "%s: Cannot stat", name);
686 * Report an error via the exit code if the failed
687 * path is a prefix of what the user provided via
688 * the command line. (Testing for string equality
689 * here won't work due to trailing '/' characters.)
691 if (memcmp(name, path, strlen(name)) == 0)
692 bsdtar->return_value = 1;
696 if (S_ISLNK(lst->st_mode))
697 st = tree_current_stat(tree);
698 /* Default: descend into any dir or symlink to dir. */
699 /* We'll adjust this later on. */
701 if ((st != NULL) && S_ISDIR(st->st_mode))
703 if ((lst != NULL) && S_ISDIR(lst->st_mode))
707 * If user has asked us not to cross mount points,
708 * then don't descend into into a dir on a different
712 first_dev = lst->st_dev;
715 if (bsdtar->option_dont_traverse_mounts) {
716 if (lst != NULL && lst->st_dev != first_dev)
721 * If this file/dir is flagged "nodump" and we're
722 * honoring such flags, skip this file/dir.
725 if (bsdtar->option_honor_nodump &&
726 (lst->st_flags & UF_NODUMP))
730 #ifdef HAVE_EXT2FS_EXT2_FS_H
732 * Linux has a nodump flag too but to read it
733 * we have to open() the file/dir and do an ioctl on it...
735 if (bsdtar->option_honor_nodump &&
736 ((fd = open(name, O_RDONLY|O_NONBLOCK)) >= 0) &&
737 ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags)),
738 close(fd), r) >= 0 &&
739 (fflags & EXT2_NODUMP_FL))
744 * If this file/dir is excluded by a filename
747 if (excluded(bsdtar, name))
751 * If the user vetoes this file/directory, skip it.
753 if (bsdtar->option_interactive &&
754 !yes("add '%s'", name))
758 * If this is a dir, decide whether or not to recurse.
760 if (bsdtar->option_no_subdirs)
764 * Distinguish 'L'/'P'/'H' symlink following.
766 switch(symlink_mode) {
768 /* 'H': After the first item, rest like 'P'. */
770 /* 'H': First item (from command line) like 'L'. */
773 /* 'L': Do descend through a symlink to dir. */
774 /* 'L': Archive symlink to file as file. */
775 lst = tree_current_stat(tree);
776 /* If stat fails, we have a broken symlink;
777 * in that case, archive the link as such. */
779 lst = tree_current_lstat(tree);
782 /* 'P': Don't descend through a symlink to dir. */
783 if (!S_ISDIR(lst->st_mode))
785 /* 'P': Archive symlink to file as symlink. */
786 /* lst = tree_current_lstat(tree); */
794 * Write the entry. Note that write_entry() handles
795 * pathname editing and newness testing.
797 write_entry(bsdtar, a, lst, name,
798 tree_current_access_path(tree));
804 * Backend for write_entry.
807 write_entry_backend(struct bsdtar *bsdtar, struct archive *a,
808 struct archive_entry *entry, int fd)
812 if (fd == -1 && archive_entry_size(entry) > 0) {
813 const char *pathname = archive_entry_sourcepath(entry);
814 fd = open(pathname, O_RDONLY);
816 if (!bsdtar->verbose)
817 bsdtar_warnc(bsdtar, errno,
818 "%s: could not open file", pathname);
820 fprintf(stderr, ": %s", strerror(errno));
825 e = archive_write_header(a, entry);
826 if (e != ARCHIVE_OK) {
827 if (!bsdtar->verbose)
828 bsdtar_warnc(bsdtar, 0, "%s: %s",
829 archive_entry_pathname(entry),
830 archive_error_string(a));
832 fprintf(stderr, ": %s", archive_error_string(a));
835 if (e == ARCHIVE_FATAL)
839 * If we opened a file earlier, write it out now. Note that
840 * the format handler might have reset the size field to zero
841 * to inform us that the archive body won't get stored. In
842 * that case, just skip the write.
844 if (e >= ARCHIVE_WARN && fd >= 0 && archive_entry_size(entry) > 0) {
845 if (write_file_data(bsdtar, a, fd))
852 * Add a single filesystem object to the archive.
855 write_entry(struct bsdtar *bsdtar, struct archive *a, const struct stat *st,
856 const char *pathname, const char *accpath)
858 struct archive_entry *entry, *sparse_entry;
860 #ifdef HAVE_EXT2FS_EXT2_FS_H
862 unsigned long stflags;
864 static char linkbuffer[PATH_MAX+1];
867 entry = archive_entry_new();
869 archive_entry_set_pathname(entry, pathname);
870 archive_entry_copy_sourcepath(entry, accpath);
873 * Rewrite the pathname to be archived. If rewrite
874 * fails, skip the entry.
876 if (edit_pathname(bsdtar, entry))
880 * In -u mode, check that the file is newer than what's
881 * already in the archive; in all modes, obey --newerXXX flags.
883 if (!new_enough(bsdtar, archive_entry_pathname(entry), st))
886 /* Display entry as we process it. This format is required by SUSv2. */
888 safe_fprintf(stderr, "a %s", archive_entry_pathname(entry));
890 /* Read symbolic link information. */
891 if ((st->st_mode & S_IFMT) == S_IFLNK) {
894 lnklen = readlink(accpath, linkbuffer, PATH_MAX);
896 if (!bsdtar->verbose)
897 bsdtar_warnc(bsdtar, errno,
898 "%s: Couldn't read symbolic link",
902 ": Couldn't read symbolic link: %s",
906 linkbuffer[lnklen] = 0;
907 archive_entry_set_symlink(entry, linkbuffer);
910 /* Look up username and group name. */
911 archive_entry_set_uname(entry, lookup_uname(bsdtar, st->st_uid));
912 archive_entry_set_gname(entry, lookup_gname(bsdtar, st->st_gid));
915 if (st->st_flags != 0)
916 archive_entry_set_fflags(entry, st->st_flags, 0);
919 #ifdef HAVE_EXT2FS_EXT2_FS_H
920 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode)) &&
921 ((fd = open(accpath, O_RDONLY|O_NONBLOCK)) >= 0) &&
922 ((r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags)), close(fd), (fd = -1), r) >= 0 &&
924 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, fd);
947 archive_entry_free(entry);
948 entry = sparse_entry;
954 fprintf(stderr, "\n");
960 archive_entry_free(entry);
964 /* Helper function to copy file to archive, with stack-allocated buffer. */
966 write_file_data(struct bsdtar *bsdtar, struct archive *a, int fd)
970 ssize_t bytes_written;
973 /* XXX TODO: Allocate buffer on heap and store pointer to
974 * it in bsdtar structure; arrange cleanup as well. XXX */
976 bytes_read = read(fd, buff, sizeof(buff));
977 while (bytes_read > 0) {
978 siginfo_printinfo(bsdtar, progress);
980 bytes_written = archive_write_data(a, buff, bytes_read);
981 if (bytes_written < 0) {
982 /* Write failed; this is bad */
983 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
986 if (bytes_written < bytes_read) {
987 /* Write was truncated; warn but continue. */
988 bsdtar_warnc(bsdtar, 0,
989 "Truncated write; file may have grown while being archived.");
992 progress += bytes_written;
993 bytes_read = read(fd, buff, sizeof(buff));
1000 create_cleanup(struct bsdtar *bsdtar)
1002 free_cache(bsdtar->uname_cache);
1003 bsdtar->uname_cache = NULL;
1004 free_cache(bsdtar->gname_cache);
1005 bsdtar->gname_cache = NULL;
1008 #ifdef HAVE_POSIX_ACL
1009 static void setup_acl(struct bsdtar *bsdtar,
1010 struct archive_entry *entry, const char *accpath,
1011 int acl_type, int archive_entry_acl_type);
1014 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1015 const char *accpath)
1017 archive_entry_acl_clear(entry);
1019 setup_acl(bsdtar, entry, accpath,
1020 ACL_TYPE_ACCESS, ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
1021 /* Only directories can have default ACLs. */
1022 if (S_ISDIR(archive_entry_mode(entry)))
1023 setup_acl(bsdtar, entry, accpath,
1024 ACL_TYPE_DEFAULT, ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
1028 setup_acl(struct bsdtar *bsdtar, struct archive_entry *entry,
1029 const char *accpath, int acl_type, int archive_entry_acl_type)
1033 acl_entry_t acl_entry;
1034 acl_permset_t acl_permset;
1035 int s, ae_id, ae_tag, ae_perm;
1036 const char *ae_name;
1038 /* Retrieve access ACL from file. */
1039 acl = acl_get_file(accpath, acl_type);
1041 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
1046 acl_get_tag_type(acl_entry, &acl_tag);
1047 if (acl_tag == ACL_USER) {
1048 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
1049 ae_name = lookup_uname(bsdtar, ae_id);
1050 ae_tag = ARCHIVE_ENTRY_ACL_USER;
1051 } else if (acl_tag == ACL_GROUP) {
1052 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
1053 ae_name = lookup_gname(bsdtar, ae_id);
1054 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
1055 } else if (acl_tag == ACL_MASK) {
1056 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
1057 } else if (acl_tag == ACL_USER_OBJ) {
1058 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
1059 } else if (acl_tag == ACL_GROUP_OBJ) {
1060 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
1061 } else if (acl_tag == ACL_OTHER) {
1062 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
1064 /* Skip types that libarchive can't support. */
1068 acl_get_permset(acl_entry, &acl_permset);
1071 * acl_get_perm() is spelled differently on different
1072 * platforms; see bsdtar_platform.h for details.
1074 if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
1075 ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
1076 if (ACL_GET_PERM(acl_permset, ACL_READ))
1077 ae_perm |= ARCHIVE_ENTRY_ACL_READ;
1078 if (ACL_GET_PERM(acl_permset, ACL_WRITE))
1079 ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
1081 archive_entry_acl_add_entry(entry,
1082 archive_entry_acl_type, ae_perm, ae_tag,
1085 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
1092 setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
1093 const char *accpath)
1101 #if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
1104 setup_xattr(struct bsdtar *bsdtar, struct archive_entry *entry,
1105 const char *accpath, const char *name)
1109 char symlink_mode = bsdtar->symlink_mode;
1111 if (symlink_mode == 'H')
1112 size = getxattr(accpath, name, NULL, 0);
1114 size = lgetxattr(accpath, name, NULL, 0);
1117 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1121 if (size > 0 && (value = malloc(size)) == NULL) {
1122 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1126 if (symlink_mode == 'H')
1127 size = getxattr(accpath, name, value, size);
1129 size = lgetxattr(accpath, name, value, size);
1132 bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
1136 archive_entry_xattr_add_entry(entry, name, value, size);
1142 * Linux extended attribute support
1145 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1146 const char *accpath)
1150 char symlink_mode = bsdtar->symlink_mode;
1152 if (symlink_mode == 'H')
1153 list_size = listxattr(accpath, NULL, 0);
1155 list_size = llistxattr(accpath, NULL, 0);
1157 if (list_size == -1) {
1158 bsdtar_warnc(bsdtar, errno,
1159 "Couldn't list extended attributes");
1161 } else if (list_size == 0)
1164 if ((list = malloc(list_size)) == NULL) {
1165 bsdtar_errc(bsdtar, 1, errno, "Out of memory");
1169 if (symlink_mode == 'H')
1170 list_size = listxattr(accpath, list, list_size);
1172 list_size = llistxattr(accpath, list, list_size);
1174 if (list_size == -1) {
1175 bsdtar_warnc(bsdtar, errno,
1176 "Couldn't list extended attributes");
1181 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
1182 if (strncmp(p, "system.", 7) == 0 ||
1183 strncmp(p, "xfsroot.", 8) == 0)
1186 setup_xattr(bsdtar, entry, accpath, p);
1195 * Generic (stub) extended attribute support.
1198 setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
1199 const char *accpath)
1201 (void)bsdtar; /* UNUSED */
1202 (void)entry; /* UNUSED */
1203 (void)accpath; /* UNUSED */
1209 free_cache(struct name_cache *cache)
1213 if (cache != NULL) {
1214 for (i = 0; i < cache->size; i++) {
1215 if (cache->cache[i].name != NULL &&
1216 cache->cache[i].name != NO_NAME)
1217 free((void *)(uintptr_t)cache->cache[i].name);
1224 * Lookup uid/gid from uname/gname, return NULL if no match.
1227 lookup_name(struct bsdtar *bsdtar, struct name_cache **name_cache_variable,
1228 int (*lookup_fn)(struct bsdtar *, const char **, id_t), id_t id)
1230 struct name_cache *cache;
1235 if (*name_cache_variable == NULL) {
1236 *name_cache_variable = malloc(sizeof(struct name_cache));
1237 if (*name_cache_variable == NULL)
1238 bsdtar_errc(bsdtar, 1, ENOMEM, "No more memory");
1239 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1240 (*name_cache_variable)->size = name_cache_size;
1243 cache = *name_cache_variable;
1246 slot = id % cache->size;
1247 if (cache->cache[slot].name != NULL) {
1248 if (cache->cache[slot].id == id) {
1250 if (cache->cache[slot].name == NO_NAME)
1252 return (cache->cache[slot].name);
1254 if (cache->cache[slot].name != NO_NAME)
1255 free((void *)(uintptr_t)cache->cache[slot].name);
1256 cache->cache[slot].name = NULL;
1259 if (lookup_fn(bsdtar, &name, id) == 0) {
1260 if (name == NULL || name[0] == '\0') {
1261 /* Cache the negative response. */
1262 cache->cache[slot].name = NO_NAME;
1263 cache->cache[slot].id = id;
1265 cache->cache[slot].name = strdup(name);
1266 if (cache->cache[slot].name != NULL) {
1267 cache->cache[slot].id = id;
1268 return (cache->cache[slot].name);
1271 * Conveniently, NULL marks an empty slot, so
1272 * if the strdup() fails, we've just failed to
1273 * cache it. No recovery necessary.
1281 lookup_uname(struct bsdtar *bsdtar, uid_t uid)
1283 return (lookup_name(bsdtar, &bsdtar->uname_cache,
1284 &lookup_uname_helper, (id_t)uid));
1288 lookup_uname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1290 struct passwd *pwent;
1292 (void)bsdtar; /* UNUSED */
1295 pwent = getpwuid((uid_t)id);
1296 if (pwent == NULL) {
1299 bsdtar_warnc(bsdtar, errno, "getpwuid(%d) failed", id);
1303 *name = pwent->pw_name;
1308 lookup_gname(struct bsdtar *bsdtar, gid_t gid)
1310 return (lookup_name(bsdtar, &bsdtar->gname_cache,
1311 &lookup_gname_helper, (id_t)gid));
1315 lookup_gname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
1317 struct group *grent;
1319 (void)bsdtar; /* UNUSED */
1322 grent = getgrgid((gid_t)id);
1323 if (grent == NULL) {
1326 bsdtar_warnc(bsdtar, errno, "getgrgid(%d) failed", id);
1330 *name = grent->gr_name;
1335 * Test if the specified file is new enough to include in the archive.
1338 new_enough(struct bsdtar *bsdtar, const char *path, const struct stat *st)
1340 struct archive_dir_entry *p;
1343 * If this file/dir is excluded by a time comparison, skip it.
1345 if (bsdtar->newer_ctime_sec > 0) {
1346 if (st->st_ctime < bsdtar->newer_ctime_sec)
1347 return (0); /* Too old, skip it. */
1348 if (st->st_ctime == bsdtar->newer_ctime_sec
1349 && ARCHIVE_STAT_CTIME_NANOS(st)
1350 <= bsdtar->newer_ctime_nsec)
1351 return (0); /* Too old, skip it. */
1353 if (bsdtar->newer_mtime_sec > 0) {
1354 if (st->st_mtime < bsdtar->newer_mtime_sec)
1355 return (0); /* Too old, skip it. */
1356 if (st->st_mtime == bsdtar->newer_mtime_sec
1357 && ARCHIVE_STAT_MTIME_NANOS(st)
1358 <= bsdtar->newer_mtime_nsec)
1359 return (0); /* Too old, skip it. */
1363 * In -u mode, we only write an entry if it's newer than
1364 * what was already in the archive.
1366 if (bsdtar->archive_dir != NULL &&
1367 bsdtar->archive_dir->head != NULL) {
1368 for (p = bsdtar->archive_dir->head; p != NULL; p = p->next) {
1369 if (pathcmp(path, p->name)==0)
1370 return (p->mtime_sec < st->st_mtime ||
1371 (p->mtime_sec == st->st_mtime &&
1373 < ARCHIVE_STAT_MTIME_NANOS(st)));
1377 /* If the file wasn't rejected, include it. */
1382 * Add an entry to the dir list for 'u' mode.
1384 * XXX TODO: Make this fast.
1387 add_dir_list(struct bsdtar *bsdtar, const char *path,
1388 time_t mtime_sec, int mtime_nsec)
1390 struct archive_dir_entry *p;
1393 * Search entire list to see if this file has appeared before.
1394 * If it has, override the timestamp data.
1396 p = bsdtar->archive_dir->head;
1398 if (strcmp(path, p->name)==0) {
1399 p->mtime_sec = mtime_sec;
1400 p->mtime_nsec = mtime_nsec;
1406 p = malloc(sizeof(*p));
1408 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1410 p->name = strdup(path);
1411 if (p->name == NULL)
1412 bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
1413 p->mtime_sec = mtime_sec;
1414 p->mtime_nsec = mtime_nsec;
1416 if (bsdtar->archive_dir->tail == NULL) {
1417 bsdtar->archive_dir->head = bsdtar->archive_dir->tail = p;
1419 bsdtar->archive_dir->tail->next = p;
1420 bsdtar->archive_dir->tail = p;
1425 test_for_append(struct bsdtar *bsdtar)
1429 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
1430 bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
1431 if (bsdtar->filename == NULL)
1432 bsdtar_errc(bsdtar, 1, 0, "Cannot append to stdout.");
1434 if (bsdtar->create_compression != 0)
1435 bsdtar_errc(bsdtar, 1, 0,
1436 "Cannot append to %s with compression", bsdtar->filename);
1438 if (stat(bsdtar->filename, &s) != 0)
1441 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode))
1442 bsdtar_errc(bsdtar, 1, 0,
1443 "Cannot append to %s: not a regular file.",