/*
* Write a single entry to the archive.
*/
static void
write_entry(struct bsdtar *bsdtar, struct archive *a,
struct archive_entry *entry)
{
int e;
e = archive_write_header(a, entry);
if (e != ARCHIVE_OK) {
if (bsdtar->verbose > 1) {
safe_fprintf(stderr, "a ");
list_item_verbose(bsdtar, stderr, entry);
lafe_warnc(0, ": %s", archive_error_string(a));
} else if (bsdtar->verbose > 0) {
lafe_warnc(0, "%s: %s",
archive_entry_pathname(entry),
archive_error_string(a));
} else
fprintf(stderr, ": %s", archive_error_string(a));
}
if (e == ARCHIVE_FATAL)
exit(1);
/*
* If we opened a file earlier, write it out now. Note that
* the format handler might have reset the size field to zero
* to inform us that the archive body won't get stored. In
* that case, just skip the write.
*/
if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) {
if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry))
exit(1);
}
}
/*
* Copy from specified archive to current archive. Returns non-zero
* for write errors (which force us to terminate the entire archiving
* operation). If there are errors reading the input archive, we set
* bsdtar->return_value but return zero, so the overall archiving
* operation will complete and return non-zero.
*/
static int
append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
const char *raw_filename)
{
struct archive *ina;
const char *filename = raw_filename;
int rc;
if (strcmp(filename, "-") == 0)
filename = NULL; /* Library uses NULL for stdio. */
ina = archive_read_new();
archive_read_support_format_all(ina);
archive_read_support_filter_all(ina);
set_reader_options(bsdtar, a);
if (archive_read_open_filename(ina, filename,
bsdtar->bytes_per_block)) {
lafe_warnc(0, "%s", archive_error_string(ina));
bsdtar->return_value = 1;
return (0);
}
rc = append_archive(bsdtar, a, ina);
if (rc != ARCHIVE_OK) {
lafe_warnc(0, "Error reading archive %s: %s",
raw_filename, archive_error_string(ina));
bsdtar->return_value = 1;
}
archive_read_free(ina);
return (rc);
}
/*
* Exits if there's a fatal error. Returns ARCHIVE_OK
* if everything is kosher.
*/
static int
extract_data(struct archive *ar, struct archive *aw)
{
int r;
size_t size;
const void *block;
off_t offset;
for (;;) {
r = archive_read_data_block(ar, &block, &size, &offset);
if (r == ARCHIVE_EOF)
return (ARCHIVE_OK);
if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(ar),
"%s", archive_error_string(ar));
exit(1);
}
r = archive_write_data_block(aw, block, size, offset);
if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(aw),
"%s", archive_error_string(aw));
return (r);
}
}
}
/*
* Write a single entry to the archive.
*/
static void
write_entry(struct bsdtar *bsdtar, struct archive *a,
struct archive_entry *entry)
{
int fd = -1;
int e;
size_t align = 4096;
if (archive_entry_size(entry) > 0) {
const char *pathname = archive_entry_sourcepath(entry);
/* TODO: Use O_DIRECT here and set 'align' to the
* actual filesystem block size. As of July 2010, new
* directory-traversal code is going in that will make
* it much easier to track filesystem properties like
* this during the traversal. */
fd = open(pathname, O_RDONLY | O_BINARY);
align = 4096;
if (fd == -1) {
if (!bsdtar->verbose)
lafe_warnc(errno,
"%s: could not open file", pathname);
else
fprintf(stderr, ": %s", strerror(errno));
return;
}
}
e = archive_write_header(a, entry);
if (e != ARCHIVE_OK) {
if (!bsdtar->verbose)
lafe_warnc(0, "%s: %s",
archive_entry_pathname(entry),
archive_error_string(a));
else
fprintf(stderr, ": %s", archive_error_string(a));
}
if (e == ARCHIVE_FATAL)
exit(1);
/*
* If we opened a file earlier, write it out now. Note that
* the format handler might have reset the size field to zero
* to inform us that the archive body won't get stored. In
* that case, just skip the write.
*/
if (e >= ARCHIVE_WARN && fd >= 0 && archive_entry_size(entry) > 0) {
if (write_file_data(bsdtar, a, entry, fd, align))
exit(1);
}
/*
* If we opened a file, close it now even if there was an error
* which made us decide not to write the archive body.
*/
if (fd >= 0)
close(fd);
}
static int
restore_time(struct cpio *cpio, struct archive_entry *entry,
const char *name, int fd)
{
#ifndef HAVE_UTIMES
static int warned = 0;
(void)cpio; /* UNUSED */
(void)entry; /* UNUSED */
(void)name; /* UNUSED */
if (!warned)
lafe_warnc(0, "Can't restore access times on this platform");
warned = 1;
return (fd);
#else
#if defined(_WIN32) && !defined(__CYGWIN__)
struct __timeval times[2];
#else
struct timeval times[2];
#endif
if (!cpio->option_atime_restore)
return (fd);
times[1].tv_sec = archive_entry_mtime(entry);
times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
times[0].tv_sec = archive_entry_atime(entry);
times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
if (fd >= 0 && futimes(fd, times) == 0)
return (fd);
#endif
/*
* Some platform cannot restore access times if the file descriptor
* is still opened.
*/
if (fd >= 0) {
close(fd);
fd = -1;
}
#ifdef HAVE_LUTIMES
if (lutimes(name, times) != 0)
#else
if ((AE_IFLNK != archive_entry_filetype(entry))
&& utimes(name, times) != 0)
#endif
lafe_warnc(errno, "Can't update time for %s", name);
#endif
return (fd);
}
/*
* Archive names specified in file.
*
* Unless --null was specified, a line containing exactly "-C" will
* cause the next line to be a directory to pass to chdir(). If
* --null is specified, then a line "-C" is just another filename.
*/
static void
archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
{
struct lafe_line_reader *lr;
const char *line;
bsdtar->next_line_is_dir = 0;
lr = lafe_line_reader(bsdtar->names_from_file, bsdtar->option_null);
while ((line = lafe_line_reader_next(lr)) != NULL) {
if (bsdtar->next_line_is_dir) {
if (*line != '\0')
set_chdir(bsdtar, line);
else {
lafe_warnc(0,
"Meaningless argument for -C: ''");
bsdtar->return_value = 1;
}
bsdtar->next_line_is_dir = 0;
} else if (!bsdtar->option_null && strcmp(line, "-C") == 0)
bsdtar->next_line_is_dir = 1;
else {
if (*line != '/')
do_chdir(bsdtar); /* Handle a deferred -C */
write_hierarchy(bsdtar, a, line);
}
}
lafe_line_reader_free(lr);
if (bsdtar->next_line_is_dir)
lafe_errc(1, errno,
"Unexpected end of filename list; "
"directory expected after -C");
}
/* Helper function to copy data between archives. */
static int
copy_file_data(struct bsdtar *bsdtar, struct archive *a,
struct archive *ina, struct archive_entry *entry)
{
ssize_t bytes_read;
ssize_t bytes_written;
int64_t progress = 0;
bytes_read = archive_read_data(ina, bsdtar->buff, bsdtar->buff_size);
while (bytes_read > 0) {
if (need_report())
report_write(bsdtar, a, entry, progress);
bytes_written = archive_write_data(a, bsdtar->buff,
bytes_read);
if (bytes_written < bytes_read) {
lafe_warnc(0, "%s", archive_error_string(a));
return (-1);
}
progress += bytes_written;
bytes_read = archive_read_data(ina, bsdtar->buff, bsdtar->buff_size);
}
return (0);
}
/* Helper function to copy file to archive. */
static int
write_file_data(struct bsdtar *bsdtar, struct archive *a,
struct archive_entry *entry, int fd, size_t align)
{
ssize_t bytes_read;
ssize_t bytes_written;
int64_t progress = 0;
size_t buff_size;
char *buff = bsdtar->buff;
/* Round 'buff' up to the next multiple of 'align' and reduce
* 'buff_size' accordingly. */
buff = (char *)((((uintptr_t)buff + align - 1) / align) * align);
buff_size = bsdtar->buff + bsdtar->buff_size - buff;
buff_size = (buff_size / align) * align;
bytes_read = read(fd, buff, buff_size);
while (bytes_read > 0) {
if (need_report())
report_write(bsdtar, a, entry, progress);
bytes_written = archive_write_data(a, buff, bytes_read);
if (bytes_written < 0) {
/* Write failed; this is bad */
lafe_warnc(0, "%s", archive_error_string(a));
return (-1);
}
if (bytes_written < bytes_read) {
/* Write was truncated; warn but continue. */
lafe_warnc(0,
"%s: Truncated write; file may have grown while being archived.",
archive_entry_pathname(entry));
return (0);
}
progress += bytes_written;
bytes_read = read(fd, buff, buff_size);
}
return 0;
}
int
lafe_unmatched_inclusions_warn(struct lafe_matching *matching, const char *msg)
{
struct match *p;
if (matching == NULL)
return (0);
for (p = matching->inclusions; p != NULL; p = p->next) {
if (p->matches == 0)
lafe_warnc(0, "%s: %s", p->pattern, msg);
}
return (matching->inclusions_unmatched_count);
}
static int
unmatched_inclusions_warn(struct archive *matching, const char *msg)
{
const char *p;
int r;
if (matching == NULL)
return (0);
while ((r = archive_match_path_unmatched_inclusions_next(
matching, &p)) == ARCHIVE_OK)
lafe_warnc(0, "%s: %s", p, msg);
if (r == ARCHIVE_FATAL)
lafe_errc(1, errno, "Out of memory");
return (archive_match_path_unmatched_inclusions(matching));
}
static int
append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
{
struct archive_entry *in_entry;
int e;
while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) {
if (archive_match_excluded(bsdtar->matching, in_entry))
continue;
if (bsdtar->option_interactive &&
!yes("copy '%s'", archive_entry_pathname(in_entry)))
continue;
if (bsdtar->verbose > 1) {
safe_fprintf(stderr, "a ");
list_item_verbose(bsdtar, stderr, in_entry);
} else if (bsdtar->verbose > 0)
safe_fprintf(stderr, "a %s",
archive_entry_pathname(in_entry));
if (need_report())
report_write(bsdtar, a, in_entry, 0);
e = archive_write_header(a, in_entry);
if (e != ARCHIVE_OK) {
if (!bsdtar->verbose)
lafe_warnc(0, "%s: %s",
archive_entry_pathname(in_entry),
archive_error_string(a));
else
fprintf(stderr, ": %s", archive_error_string(a));
}
if (e == ARCHIVE_FATAL)
exit(1);
if (e >= ARCHIVE_WARN) {
if (archive_entry_size(in_entry) == 0)
archive_read_data_skip(ina);
else if (copy_file_data_block(bsdtar, a, ina, in_entry))
exit(1);
}
if (bsdtar->verbose)
fprintf(stderr, "\n");
}
return (e == ARCHIVE_EOF ? ARCHIVE_OK : e);
}
static int
lookup_uname_helper(struct cpio *cpio, const char **name, id_t id)
{
struct passwd *pwent;
(void)cpio; /* UNUSED */
errno = 0;
pwent = getpwuid((uid_t)id);
if (pwent == NULL) {
*name = NULL;
if (errno != 0 && errno != ENOENT)
lafe_warnc(errno, "getpwuid(%d) failed", id);
return (errno);
}
*name = pwent->pw_name;
return (0);
}
static int
lookup_gname_helper(struct cpio *cpio, const char **name, id_t id)
{
struct group *grent;
(void)cpio; /* UNUSED */
errno = 0;
grent = getgrgid((gid_t)id);
if (grent == NULL) {
*name = NULL;
if (errno != 0)
lafe_warnc(errno, "getgrgid(%d) failed", id);
return (errno);
}
*name = grent->gr_name;
return (0);
}
int
main(int argc, char **argv)
{
struct bsdtar *bsdtar, bsdtar_storage;
int opt, t;
char option_o;
char possible_help_request;
char buff[16];
time_t now;
/*
* Use a pointer for consistency, but stack-allocated storage
* for ease of cleanup.
*/
_bsdtar = bsdtar = &bsdtar_storage;
memset(bsdtar, 0, sizeof(*bsdtar));
bsdtar->fd = -1; /* Mark as "unused" */
option_o = 0;
#if defined(SIGINFO) || defined(SIGUSR1)
{ /* Catch SIGINFO and SIGUSR1, if they exist. */
struct sigaction sa;
sa.sa_handler = siginfo_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
#ifdef SIGINFO
if (sigaction(SIGINFO, &sa, NULL))
lafe_errc(1, errno, "sigaction(SIGINFO) failed");
#endif
#ifdef SIGUSR1
/* ... and treat SIGUSR1 the same way as SIGINFO. */
if (sigaction(SIGUSR1, &sa, NULL))
lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
#endif
}
#endif
/* Need lafe_progname before calling lafe_warnc. */
if (*argv == NULL)
lafe_progname = "bsdtar";
else {
#if defined(_WIN32) && !defined(__CYGWIN__)
lafe_progname = strrchr(*argv, '\\');
#else
lafe_progname = strrchr(*argv, '/');
#endif
if (lafe_progname != NULL)
lafe_progname++;
else
lafe_progname = *argv;
}
time(&now);
#if HAVE_SETLOCALE
if (setlocale(LC_ALL, "") == NULL)
lafe_warnc(0, "Failed to set default locale");
#endif
#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
#endif
possible_help_request = 0;
/* Look up uid of current user for future reference */
bsdtar->user_uid = geteuid();
/* Default: open tape drive. */
bsdtar->filename = getenv("TAPE");
if (bsdtar->filename == NULL)
bsdtar->filename = _PATH_DEFTAPE;
/* Default: preserve mod time on extract */
bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
/* Default: Perform basic security checks. */
bsdtar->extract_flags |= SECURITY;
#ifndef _WIN32
/* On POSIX systems, assume --same-owner and -p when run by
* the root user. This doesn't make any sense on Windows. */
if (bsdtar->user_uid == 0) {
/* --same-owner */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
/* -p */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
}
#endif
bsdtar->argv = argv;
bsdtar->argc = argc;
/*
* Comments following each option indicate where that option
* originated: SUSv2, POSIX, GNU tar, star, etc. If there's
* no such comment, then I don't know of anyone else who
* implements that option.
*/
while ((opt = bsdtar_getopt(bsdtar)) != -1) {
switch (opt) {
case 'B': /* GNU tar */
/* libarchive doesn't need this; just ignore it. */
break;
case 'b': /* SUSv2 */
t = atoi(bsdtar->optarg);
if (t <= 0 || t > 1024)
lafe_errc(1, 0,
"Argument to -b is out of range (1..1024)");
bsdtar->bytes_per_block = 512 * t;
break;
case 'C': /* GNU tar */
set_chdir(bsdtar, bsdtar->optarg);
break;
case 'c': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case OPTION_CHECK_LINKS: /* GNU tar */
bsdtar->option_warn_links = 1;
break;
case OPTION_CHROOT: /* NetBSD */
bsdtar->option_chroot = 1;
break;
case OPTION_EXCLUDE: /* GNU tar */
if (lafe_exclude(&bsdtar->matching, bsdtar->optarg))
lafe_errc(1, 0,
"Couldn't exclude %s\n", bsdtar->optarg);
break;
case OPTION_FORMAT: /* GNU tar, others */
bsdtar->create_format = bsdtar->optarg;
break;
case OPTION_OPTIONS:
bsdtar->option_options = bsdtar->optarg;
break;
case 'f': /* SUSv2 */
bsdtar->filename = bsdtar->optarg;
if (strcmp(bsdtar->filename, "-") == 0)
bsdtar->filename = NULL;
break;
case 'H': /* BSD convention */
bsdtar->symlink_mode = 'H';
break;
case 'h': /* Linux Standards Base, gtar; synonym for -L */
bsdtar->symlink_mode = 'L';
/* Hack: -h by itself is the "help" command. */
possible_help_request = 1;
break;
case OPTION_HELP: /* GNU tar, others */
long_help();
exit(0);
break;
case 'I': /* GNU tar */
/*
* TODO: Allow 'names' to come from an archive,
* not just a text file. Design a good UI for
* allowing names and mode/owner to be read
* from an archive, with contents coming from
* disk. This can be used to "refresh" an
* archive or to design archives with special
* permissions without having to create those
* permissions on disk.
*/
bsdtar->names_from_file = bsdtar->optarg;
break;
case OPTION_INCLUDE:
/*
* Noone else has the @archive extension, so
* noone else needs this to filter entries
* when transforming archives.
*/
if (lafe_include(&bsdtar->matching, bsdtar->optarg))
lafe_errc(1, 0,
"Failed to add %s to inclusion list",
bsdtar->optarg);
break;
case 'j': /* GNU tar */
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'J': /* GNU tar 1.21 and later */
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'k': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
break;
case OPTION_KEEP_NEWER_FILES: /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
break;
case 'L': /* BSD convention */
bsdtar->symlink_mode = 'L';
break;
case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
/* GNU tar 1.13 used -l for --one-file-system */
bsdtar->option_warn_links = 1;
break;
case OPTION_LZMA:
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'm': /* SUSv2 */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
break;
case 'n': /* GNU tar */
bsdtar->option_no_subdirs = 1;
break;
/*
* Selecting files by time:
* --newer-?time='date' Only files newer than 'date'
* --newer-?time-than='file' Only files newer than time
* on specified file (useful for incremental backups)
* TODO: Add corresponding "older" options to reverse these.
*/
case OPTION_NEWER_CTIME: /* GNU tar */
bsdtar->newer_ctime_sec = get_date(now, bsdtar->optarg);
break;
case OPTION_NEWER_CTIME_THAN:
{
struct stat st;
if (stat(bsdtar->optarg, &st) != 0)
lafe_errc(1, 0,
"Can't open file %s", bsdtar->optarg);
bsdtar->newer_ctime_sec = st.st_ctime;
bsdtar->newer_ctime_nsec =
ARCHIVE_STAT_CTIME_NANOS(&st);
}
break;
case OPTION_NEWER_MTIME: /* GNU tar */
bsdtar->newer_mtime_sec = get_date(now, bsdtar->optarg);
break;
case OPTION_NEWER_MTIME_THAN:
{
struct stat st;
if (stat(bsdtar->optarg, &st) != 0)
lafe_errc(1, 0,
"Can't open file %s", bsdtar->optarg);
bsdtar->newer_mtime_sec = st.st_mtime;
bsdtar->newer_mtime_nsec =
ARCHIVE_STAT_MTIME_NANOS(&st);
}
break;
case OPTION_NODUMP: /* star */
bsdtar->option_honor_nodump = 1;
break;
case OPTION_NO_SAME_OWNER: /* GNU tar */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
break;
case OPTION_NULL: /* GNU tar */
bsdtar->option_null++;
break;
case OPTION_NUMERIC_OWNER: /* GNU tar */
bsdtar->option_numeric_owner++;
break;
case 'O': /* GNU tar */
bsdtar->option_stdout = 1;
break;
case 'o': /* SUSv2 and GNU conflict here, but not fatally */
option_o = 1; /* Record it and resolve it later. */
break;
case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
bsdtar->option_dont_traverse_mounts = 1;
break;
#if 0
/*
* The common BSD -P option is not necessary, since
* our default is to archive symlinks, not follow
* them. This is convenient, as -P conflicts with GNU
* tar anyway.
*/
case 'P': /* BSD convention */
/* Default behavior, no option necessary. */
break;
#endif
case 'P': /* GNU tar */
bsdtar->extract_flags &= ~SECURITY;
bsdtar->option_absolute_paths = 1;
break;
case 'p': /* GNU tar, star */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
break;
case OPTION_POSIX: /* GNU tar */
bsdtar->create_format = "pax";
break;
case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
bsdtar->option_fast_read = 1;
break;
case 'r': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case 'S': /* NetBSD pax-as-tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
break;
case 's': /* NetBSD pax-as-tar */
#if HAVE_REGEX_H
add_substitution(bsdtar, bsdtar->optarg);
#else
lafe_warnc(0,
"-s is not supported by this version of bsdtar");
usage();
#endif
break;
case OPTION_SAME_OWNER: /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
bsdtar->strip_components = atoi(bsdtar->optarg);
break;
case 'T': /* GNU tar */
bsdtar->names_from_file = bsdtar->optarg;
break;
case 't': /* SUSv2 */
set_mode(bsdtar, opt);
bsdtar->verbose++;
break;
case OPTION_TOTALS: /* GNU tar */
bsdtar->option_totals++;
break;
case 'U': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
bsdtar->option_unlink_first = 1;
break;
case 'u': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case 'v': /* SUSv2 */
bsdtar->verbose++;
break;
case OPTION_VERSION: /* GNU convention */
version();
break;
#if 0
/*
* The -W longopt feature is handled inside of
* bsdtar_getopt(), so -W is not available here.
*/
case 'W': /* Obscure GNU convention. */
break;
#endif
case 'w': /* SUSv2 */
bsdtar->option_interactive = 1;
break;
case 'X': /* GNU tar */
if (lafe_exclude_from_file(&bsdtar->matching, bsdtar->optarg))
lafe_errc(1, 0,
"failed to process exclusions from file %s",
bsdtar->optarg);
break;
case 'x': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case 'y': /* FreeBSD version of GNU tar */
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'Z': /* GNU tar */
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'z': /* GNU tar, star, many others */
if (bsdtar->create_compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case OPTION_USE_COMPRESS_PROGRAM:
bsdtar->compress_program = bsdtar->optarg;
break;
default:
usage();
}
}
/*
* Sanity-check options.
*/
/* If no "real" mode was specified, treat -h as --help. */
if ((bsdtar->mode == '\0') && possible_help_request) {
long_help();
exit(0);
}
/* Otherwise, a mode is required. */
if (bsdtar->mode == '\0')
lafe_errc(1, 0,
"Must specify one of -c, -r, -t, -u, -x");
/* Check boolean options only permitted in certain modes. */
if (bsdtar->option_dont_traverse_mounts)
only_mode(bsdtar, "--one-file-system", "cru");
if (bsdtar->option_fast_read)
only_mode(bsdtar, "--fast-read", "xt");
if (bsdtar->option_honor_nodump)
only_mode(bsdtar, "--nodump", "cru");
if (option_o > 0) {
switch (bsdtar->mode) {
case 'c':
/*
* In GNU tar, -o means "old format." The
* "ustar" format is the closest thing
* supported by libarchive.
*/
bsdtar->create_format = "ustar";
/* TODO: bsdtar->create_format = "v7"; */
break;
case 'x':
/* POSIX-compatible behavior. */
bsdtar->option_no_owner = 1;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
default:
only_mode(bsdtar, "-o", "xc");
break;
}
}
if (bsdtar->option_no_subdirs)
only_mode(bsdtar, "-n", "cru");
if (bsdtar->option_stdout)
only_mode(bsdtar, "-O", "xt");
if (bsdtar->option_unlink_first)
only_mode(bsdtar, "-U", "x");
if (bsdtar->option_warn_links)
only_mode(bsdtar, "--check-links", "cr");
/* Check other parameters only permitted in certain modes. */
if (bsdtar->create_compression != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->create_compression;
only_mode(bsdtar, buff, "cxt");
}
if (bsdtar->create_format != NULL)
only_mode(bsdtar, "--format", "cru");
if (bsdtar->symlink_mode != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->symlink_mode;
only_mode(bsdtar, buff, "cru");
}
if (bsdtar->strip_components != 0)
only_mode(bsdtar, "--strip-components", "xt");
switch(bsdtar->mode) {
case 'c':
tar_mode_c(bsdtar);
break;
case 'r':
tar_mode_r(bsdtar);
break;
case 't':
tar_mode_t(bsdtar);
break;
case 'u':
tar_mode_u(bsdtar);
break;
case 'x':
tar_mode_x(bsdtar);
break;
}
lafe_cleanup_exclusions(&bsdtar->matching);
#if HAVE_REGEX_H
cleanup_substitution(bsdtar);
#endif
if (bsdtar->return_value != 0)
lafe_warnc(0,
"Error exit delayed from previous errors.");
return (bsdtar->return_value);
}
/*-
* The logic here for -C <dir> attempts to avoid
* chdir() as long as possible. For example:
* "-C /foo -C /bar file" needs chdir("/bar") but not chdir("/foo")
* "-C /foo -C bar file" needs chdir("/foo/bar")
* "-C /foo -C bar /file1" does not need chdir()
* "-C /foo -C bar /file1 file2" needs chdir("/foo/bar") before file2
*
* The only correct way to handle this is to record a "pending" chdir
* request and combine multiple requests intelligently until we
* need to process a non-absolute file. set_chdir() adds the new dir
* to the pending list; do_chdir() actually executes any pending chdir.
*
* This way, programs that build tar command lines don't have to worry
* about -C with non-existent directories; such requests will only
* fail if the directory must be accessed.
*
*/
void
set_chdir(struct bsdtar *bsdtar, const char *newdir)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
if (newdir[0] == '/' || newdir[0] == '\\' ||
/* Detect this type, for example, "C:\" or "C:/" */
(((newdir[0] >= 'a' && newdir[0] <= 'z') ||
(newdir[0] >= 'A' && newdir[0] <= 'Z')) &&
newdir[1] == ':' && (newdir[2] == '/' || newdir[2] == '\\'))) {
#else
if (newdir[0] == '/') {
#endif
/* The -C /foo -C /bar case; dump first one. */
free(bsdtar->pending_chdir);
bsdtar->pending_chdir = NULL;
}
if (bsdtar->pending_chdir == NULL)
/* Easy case: no previously-saved dir. */
bsdtar->pending_chdir = strdup(newdir);
else {
/* The -C /foo -C bar case; concatenate */
char *old_pending = bsdtar->pending_chdir;
size_t old_len = strlen(old_pending);
bsdtar->pending_chdir = malloc(old_len + strlen(newdir) + 2);
if (old_pending[old_len - 1] == '/')
old_pending[old_len - 1] = '\0';
if (bsdtar->pending_chdir != NULL)
sprintf(bsdtar->pending_chdir, "%s/%s",
old_pending, newdir);
free(old_pending);
}
if (bsdtar->pending_chdir == NULL)
lafe_errc(1, errno, "No memory");
}
void
do_chdir(struct bsdtar *bsdtar)
{
if (bsdtar->pending_chdir == NULL)
return;
if (chdir(bsdtar->pending_chdir) != 0) {
lafe_errc(1, 0, "could not chdir to '%s'\n",
bsdtar->pending_chdir);
}
free(bsdtar->pending_chdir);
bsdtar->pending_chdir = NULL;
}
static const char *
strip_components(const char *p, int elements)
{
/* Skip as many elements as necessary. */
while (elements > 0) {
switch (*p++) {
case '/':
#if defined(_WIN32) && !defined(__CYGWIN__)
case '\\': /* Support \ path sep on Windows ONLY. */
#endif
elements--;
break;
case '\0':
/* Path is too short, skip it. */
return (NULL);
}
}
/* Skip any / characters. This handles short paths that have
* additional / termination. This also handles the case where
* the logic above stops in the middle of a duplicate //
* sequence (which would otherwise get converted to an
* absolute path). */
for (;;) {
switch (*p) {
case '/':
#if defined(_WIN32) && !defined(__CYGWIN__)
case '\\': /* Support \ path sep on Windows ONLY. */
#endif
++p;
break;
case '\0':
return (NULL);
default:
return (p);
}
}
}
static void
warn_strip_leading_char(struct bsdtar *bsdtar, const char *c)
{
if (!bsdtar->warned_lead_slash) {
lafe_warnc(0,
"Removing leading '%c' from member names",
c[0]);
bsdtar->warned_lead_slash = 1;
}
}
static void
warn_strip_drive_letter(struct bsdtar *bsdtar)
{
if (!bsdtar->warned_lead_slash) {
lafe_warnc(0,
"Removing leading drive letter from "
"member names");
bsdtar->warned_lead_slash = 1;
}
}
/*
* Convert absolute path to non-absolute path by skipping leading
* absolute path prefixes.
*/
static const char*
strip_absolute_path(struct bsdtar *bsdtar, const char *p)
{
const char *rp;
/* Remove leading "//./" or "//?/" or "//?/UNC/"
* (absolute path prefixes used by Windows API) */
if ((p[0] == '/' || p[0] == '\\') &&
(p[1] == '/' || p[1] == '\\') &&
(p[2] == '.' || p[2] == '?') &&
(p[3] == '/' || p[3] == '\\'))
{
if (p[2] == '?' &&
(p[4] == 'U' || p[4] == 'u') &&
(p[5] == 'N' || p[5] == 'n') &&
(p[6] == 'C' || p[6] == 'c') &&
(p[7] == '/' || p[7] == '\\'))
p += 8;
else
p += 4;
warn_strip_drive_letter(bsdtar);
}
/* Remove multiple leading slashes and Windows drive letters. */
do {
rp = p;
if (((p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= 'A' && p[0] <= 'Z')) &&
p[1] == ':') {
p += 2;
warn_strip_drive_letter(bsdtar);
}
/* Remove leading "/../", "/./", "//", etc. */
while (p[0] == '/' || p[0] == '\\') {
if (p[1] == '.' &&
p[2] == '.' &&
(p[3] == '/' || p[3] == '\\')) {
p += 3; /* Remove "/..", leave "/" for next pass. */
} else if (p[1] == '.' &&
(p[2] == '/' || p[2] == '\\')) {
p += 2; /* Remove "/.", leave "/" for next pass. */
} else
p += 1; /* Remove "/". */
warn_strip_leading_char(bsdtar, rp);
}
} while (rp != p);
return (p);
}
/*
* Handle --strip-components and any future path-rewriting options.
* Returns non-zero if the pathname should not be extracted.
*
* Note: The rewrites are applied uniformly to pathnames and hardlink
* names but not to symlink bodies. This is deliberate: Symlink
* bodies are not necessarily filenames. Even when they are, they
* need to be interpreted relative to the directory containing them,
* so simple rewrites like this are rarely appropriate.
*
* TODO: Support pax-style regex path rewrites.
*/
int
edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
{
const char *name = archive_entry_pathname(entry);
const char *original_name = name;
const char *hardlinkname = archive_entry_hardlink(entry);
const char *original_hardlinkname = hardlinkname;
#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
char *subst_name;
int r;
/* Apply user-specified substitution to pathname. */
r = apply_substitution(bsdtar, name, &subst_name, 0, 0);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_pathname(entry, subst_name);
if (*subst_name == '\0') {
free(subst_name);
return -1;
} else
free(subst_name);
name = archive_entry_pathname(entry);
original_name = name;
}
/* Apply user-specified substitution to hardlink target. */
if (hardlinkname != NULL) {
r = apply_substitution(bsdtar, hardlinkname, &subst_name, 0, 1);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_hardlink(entry, subst_name);
free(subst_name);
}
hardlinkname = archive_entry_hardlink(entry);
original_hardlinkname = hardlinkname;
}
/* Apply user-specified substitution to symlink body. */
if (archive_entry_symlink(entry) != NULL) {
r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1, 0);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_symlink(entry, subst_name);
free(subst_name);
}
}
#endif
/* Strip leading dir names as per --strip-components option. */
if (bsdtar->strip_components > 0) {
name = strip_components(name, bsdtar->strip_components);
if (name == NULL)
return (1);
if (hardlinkname != NULL) {
hardlinkname = strip_components(hardlinkname,
bsdtar->strip_components);
if (hardlinkname == NULL)
return (1);
}
}
if (!bsdtar->option_absolute_paths) {
/* By default, don't write or restore absolute pathnames. */
name = strip_absolute_path(bsdtar, name);
if (*name == '\0')
name = ".";
if (hardlinkname != NULL) {
hardlinkname = strip_absolute_path(bsdtar, hardlinkname);
if (*hardlinkname == '\0')
return (1);
}
} else {
/* Strip redundant leading '/' characters. */
while (name[0] == '/' && name[1] == '/')
name++;
}
/* Replace name in archive_entry. */
if (name != original_name) {
archive_entry_copy_pathname(entry, name);
}
if (hardlinkname != original_hardlinkname) {
archive_entry_copy_hardlink(entry, hardlinkname);
}
return (0);
}
/*
* It would be nice to just use printf() for formatting large numbers,
* but the compatibility problems are quite a headache. Hence the
* following simple utility function.
*/
const char *
tar_i64toa(int64_t n0)
{
static char buff[24];
uint64_t n = n0 < 0 ? -n0 : n0;
char *p = buff + sizeof(buff);
*--p = '\0';
do {
*--p = '0' + (int)(n % 10);
} while (n /= 10);
if (n0 < 0)
*--p = '-';
return p;
}
/*
* Like strcmp(), but try to be a little more aware of the fact that
* we're comparing two paths. Right now, it just handles leading
* "./" and trailing '/' specially, so that "a/b/" == "./a/b"
*
* TODO: Make this better, so that "./a//b/./c/" == "a/b/c"
* TODO: After this works, push it down into libarchive.
* TODO: Publish the path normalization routines in libarchive so
* that bsdtar can normalize paths and use fast strcmp() instead
* of this.
*
* Note: This is currently only used within write.c, so should
* not handle \ path separators.
*/
int
pathcmp(const char *a, const char *b)
{
/* Skip leading './' */
if (a[0] == '.' && a[1] == '/' && a[2] != '\0')
a += 2;
if (b[0] == '.' && b[1] == '/' && b[2] != '\0')
b += 2;
/* Find the first difference, or return (0) if none. */
while (*a == *b) {
if (*a == '\0')
return (0);
a++;
b++;
}
/*
* If one ends in '/' and the other one doesn't,
* they're the same.
*/
if (a[0] == '/' && a[1] == '\0' && b[0] == '\0')
return (0);
if (a[0] == '\0' && b[0] == '/' && b[1] == '\0')
return (0);
/* They're really different, return the correct sign. */
return (*(const unsigned char *)a - *(const unsigned char *)b);
}
#define PPBUFF_SIZE 1024
const char *
passphrase_callback(struct archive *a, void *_client_data)
{
struct bsdtar *bsdtar = (struct bsdtar *)_client_data;
(void)a; /* UNUSED */
if (bsdtar->ppbuff == NULL) {
bsdtar->ppbuff = malloc(PPBUFF_SIZE);
if (bsdtar->ppbuff == NULL)
lafe_errc(1, errno, "Out of memory");
}
return lafe_readpassphrase("Enter passphrase:",
bsdtar->ppbuff, PPBUFF_SIZE);
}
void
passphrase_free(char *ppbuff)
{
if (ppbuff != NULL) {
memset(ppbuff, 0, PPBUFF_SIZE);
free(ppbuff);
}
}
/*
* Display information about the current file.
*
* The format here roughly duplicates the output of 'ls -l'.
* This is based on SUSv2, where 'tar tv' is documented as
* listing additional information in an "unspecified format,"
* and 'pax -l' is documented as using the same format as 'ls -l'.
*/
void
list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry)
{
char tmp[100];
size_t w;
const char *p;
const char *fmt;
time_t tim;
static time_t now;
/*
* We avoid collecting the entire list in memory at once by
* listing things as we see them. However, that also means we can't
* just pre-compute the field widths. Instead, we start with guesses
* and just widen them as necessary. These numbers are completely
* arbitrary.
*/
if (!bsdtar->u_width) {
bsdtar->u_width = 6;
bsdtar->gs_width = 13;
}
if (!now)
time(&now);
fprintf(out, "%s %d ",
archive_entry_strmode(entry),
archive_entry_nlink(entry));
/* Use uname if it's present, else uid. */
p = archive_entry_uname(entry);
if ((p == NULL) || (*p == '\0')) {
sprintf(tmp, "%lu ",
(unsigned long)archive_entry_uid(entry));
p = tmp;
}
w = strlen(p);
if (w > bsdtar->u_width)
bsdtar->u_width = w;
fprintf(out, "%-*s ", (int)bsdtar->u_width, p);
/* Use gname if it's present, else gid. */
p = archive_entry_gname(entry);
if (p != NULL && p[0] != '\0') {
fprintf(out, "%s", p);
w = strlen(p);
} else {
sprintf(tmp, "%lu",
(unsigned long)archive_entry_gid(entry));
w = strlen(tmp);
fprintf(out, "%s", tmp);
}
/*
* Print device number or file size, right-aligned so as to make
* total width of group and devnum/filesize fields be gs_width.
* If gs_width is too small, grow it.
*/
if (archive_entry_filetype(entry) == AE_IFCHR
|| archive_entry_filetype(entry) == AE_IFBLK) {
sprintf(tmp, "%lu,%lu",
(unsigned long)archive_entry_rdevmajor(entry),
(unsigned long)archive_entry_rdevminor(entry));
} else {
strcpy(tmp, tar_i64toa(archive_entry_size(entry)));
}
if (w + strlen(tmp) >= bsdtar->gs_width)
bsdtar->gs_width = w+strlen(tmp)+1;
fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp);
/* Format the time using 'ls -l' conventions. */
tim = archive_entry_mtime(entry);
#define HALF_YEAR (time_t)365 * 86400 / 2
#if defined(_WIN32) && !defined(__CYGWIN__)
#define DAY_FMT "%d" /* Windows' strftime function does not support %e format. */
#else
#define DAY_FMT "%e" /* Day number without leading zeros */
#endif
if (tim < now - HALF_YEAR || tim > now + HALF_YEAR)
fmt = bsdtar->day_first ? DAY_FMT " %b %Y" : "%b " DAY_FMT " %Y";
else
fmt = bsdtar->day_first ? DAY_FMT " %b %H:%M" : "%b " DAY_FMT " %H:%M";
strftime(tmp, sizeof(tmp), fmt, localtime(&tim));
fprintf(out, " %s ", tmp);
safe_fprintf(out, "%s", archive_entry_pathname(entry));
/* Extra information for links. */
if (archive_entry_hardlink(entry)) /* Hard link */
safe_fprintf(out, " link to %s",
archive_entry_hardlink(entry));
else if (archive_entry_symlink(entry)) /* Symbolic link */
safe_fprintf(out, " -> %s", archive_entry_symlink(entry));
}
/*
* Add the file or dir hierarchy named by 'path' to the archive
*/
static void
write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
{
struct archive *disk = bsdtar->diskreader;
struct archive_entry *entry = NULL, *spare_entry = NULL;
int r;
r = archive_read_disk_open(disk, path);
if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(disk),
"%s", archive_error_string(disk));
bsdtar->return_value = 1;
return;
}
bsdtar->first_fs = -1;
for (;;) {
archive_entry_free(entry);
entry = archive_entry_new();
r = archive_read_next_header2(disk, entry);
if (r == ARCHIVE_EOF)
break;
else if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(disk),
"%s", archive_error_string(disk));
if (r == ARCHIVE_FATAL) {
bsdtar->return_value = 1;
return;
} else if (r < ARCHIVE_WARN)
continue;
}
if (bsdtar->uid >= 0) {
archive_entry_set_uid(entry, bsdtar->uid);
if (!bsdtar->uname)
archive_entry_set_uname(entry,
archive_read_disk_uname(bsdtar->diskreader,
bsdtar->uid));
}
if (bsdtar->gid >= 0) {
archive_entry_set_gid(entry, bsdtar->gid);
if (!bsdtar->gname)
archive_entry_set_gname(entry,
archive_read_disk_gname(bsdtar->diskreader,
bsdtar->gid));
}
if (bsdtar->uname)
archive_entry_set_uname(entry, bsdtar->uname);
if (bsdtar->gname)
archive_entry_set_gname(entry, bsdtar->gname);
/*
* Rewrite the pathname to be archived. If rewrite
* fails, skip the entry.
*/
if (edit_pathname(bsdtar, entry))
continue;
/* Display entry as we process it.
* This format is required by SUSv2. */
if (bsdtar->verbose)
safe_fprintf(stderr, "a %s",
archive_entry_pathname(entry));
/* Non-regular files get archived with zero size. */
if (archive_entry_filetype(entry) != AE_IFREG)
archive_entry_set_size(entry, 0);
archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry);
while (entry != NULL) {
write_file(bsdtar, a, entry);
archive_entry_free(entry);
entry = spare_entry;
spare_entry = NULL;
}
if (bsdtar->verbose)
fprintf(stderr, "\n");
}
archive_entry_free(entry);
archive_read_close(disk);
}
/* Helper function to copy file to archive. */
static int
copy_file_data_block(struct bsdtar *bsdtar, struct archive *a,
struct archive *in_a, struct archive_entry *entry)
{
size_t bytes_read;
ssize_t bytes_written;
int64_t offset, progress = 0;
char *null_buff = NULL;
const void *buff;
int r;
while ((r = archive_read_data_block(in_a, &buff,
&bytes_read, &offset)) == ARCHIVE_OK) {
if (need_report())
report_write(bsdtar, a, entry, progress);
if (offset > progress) {
int64_t sparse = offset - progress;
size_t ns;
if (null_buff == NULL) {
null_buff = bsdtar->buff;
memset(null_buff, 0, bsdtar->buff_size);
}
while (sparse > 0) {
if (sparse > (int64_t)bsdtar->buff_size)
ns = bsdtar->buff_size;
else
ns = (size_t)sparse;
bytes_written =
archive_write_data(a, null_buff, ns);
if (bytes_written < 0) {
/* Write failed; this is bad */
lafe_warnc(0, "%s",
archive_error_string(a));
return (-1);
}
if ((size_t)bytes_written < ns) {
/* Write was truncated; warn but
* continue. */
lafe_warnc(0,
"%s: Truncated write; file may "
"have grown while being archived.",
archive_entry_pathname(entry));
return (0);
}
progress += bytes_written;
sparse -= bytes_written;
}
}
bytes_written = archive_write_data(a, buff, bytes_read);
if (bytes_written < 0) {
/* Write failed; this is bad */
lafe_warnc(0, "%s", archive_error_string(a));
return (-1);
}
if ((size_t)bytes_written < bytes_read) {
/* Write was truncated; warn but continue. */
lafe_warnc(0,
"%s: Truncated write; file may have grown "
"while being archived.",
archive_entry_pathname(entry));
return (0);
}
progress += bytes_written;
}
if (r < ARCHIVE_WARN) {
lafe_warnc(archive_errno(a), "%s", archive_error_string(a));
return (-1);
}
return (0);
}
/*
* Add the file or dir hierarchy named by 'path' to the archive
*/
static void
write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
{
struct archive_entry *entry = NULL, *spare_entry = NULL;
struct tree *tree;
char symlink_mode = bsdtar->symlink_mode;
dev_t first_dev = 0;
int dev_recorded = 0;
int tree_ret;
tree = tree_open(path);
if (!tree) {
lafe_warnc(errno, "%s: Cannot open", path);
bsdtar->return_value = 1;
return;
}
while ((tree_ret = tree_next(tree)) != 0) {
int r;
const char *name = tree_current_path(tree);
const struct stat *st = NULL; /* info to use for this entry */
const struct stat *lst = NULL; /* lstat() information */
int descend;
if (tree_ret == TREE_ERROR_FATAL)
lafe_errc(1, tree_errno(tree),
"%s: Unable to continue traversing directory tree",
name);
if (tree_ret == TREE_ERROR_DIR) {
lafe_warnc(errno,
"%s: Couldn't visit directory", name);
bsdtar->return_value = 1;
}
if (tree_ret != TREE_REGULAR)
continue;
/*
* If this file/dir is excluded by a filename
* pattern, skip it.
*/
if (lafe_excluded(bsdtar->matching, name))
continue;
/*
* Get lstat() info from the tree library.
*/
lst = tree_current_lstat(tree);
if (lst == NULL) {
/* Couldn't lstat(); must not exist. */
lafe_warnc(errno, "%s: Cannot stat", name);
/* Return error if files disappear during traverse. */
bsdtar->return_value = 1;
continue;
}
/*
* Distinguish 'L'/'P'/'H' symlink following.
*/
switch(symlink_mode) {
case 'H':
/* 'H': After the first item, rest like 'P'. */
symlink_mode = 'P';
/* 'H': First item (from command line) like 'L'. */
/* FALLTHROUGH */
case 'L':
/* 'L': Do descend through a symlink to dir. */
descend = tree_current_is_dir(tree);
/* 'L': Follow symlinks to files. */
archive_read_disk_set_symlink_logical(bsdtar->diskreader);
/* 'L': Archive symlinks as targets, if we can. */
st = tree_current_stat(tree);
if (st != NULL)
break;
/* If stat fails, we have a broken symlink;
* in that case, don't follow the link. */
/* FALLTHROUGH */
default:
/* 'P': Don't descend through a symlink to dir. */
descend = tree_current_is_physical_dir(tree);
/* 'P': Don't follow symlinks to files. */
archive_read_disk_set_symlink_physical(bsdtar->diskreader);
/* 'P': Archive symlinks as symlinks. */
st = lst;
break;
}
if (bsdtar->option_no_subdirs)
descend = 0;
/*
* Are we about to cross to a new filesystem?
*/
if (!dev_recorded) {
/* This is the initial file system. */
first_dev = lst->st_dev;
dev_recorded = 1;
} else if (lst->st_dev == first_dev) {
/* The starting file system is always acceptable. */
} else if (descend == 0) {
/* We're not descending, so no need to check. */
} else if (bsdtar->option_dont_traverse_mounts) {
descend = 0;
} else {
/* We're prepared to cross a mount point. */
/* XXX TODO: check whether this filesystem is
* synthetic and/or local. Add a new
* --local-only option to skip non-local
* filesystems. Skip synthetic filesystems
* regardless.
*
* The results should be cached, since
* tree.c doesn't usually visit a directory
* and the directory contents together. A simple
* move-to-front list should perform quite well.
*
* This is going to be heavily OS dependent:
* FreeBSD's statfs() in conjunction with getvfsbyname()
* provides all of this; NetBSD's statvfs() does
* most of it; other systems will vary.
*/
}
/*
* In -u mode, check that the file is newer than what's
* already in the archive; in all modes, obey --newerXXX flags.
*/
if (!new_enough(bsdtar, name, st)) {
if (!descend)
continue;
if (bsdtar->option_interactive &&
!yes("add '%s'", name))
continue;
tree_descend(tree);
continue;
}
archive_entry_free(entry);
entry = archive_entry_new();
archive_entry_set_pathname(entry, name);
archive_entry_copy_sourcepath(entry,
tree_current_access_path(tree));
/* Populate the archive_entry with metadata from the disk. */
/* XXX TODO: Arrange to open a regular file before
* calling this so we can pass in an fd and shorten
* the race to query metadata. The linkify dance
* makes this more complex than it might sound. */
#if defined(_WIN32) && !defined(__CYGWIN__)
/* TODO: tree.c uses stat(), which is badly broken
* on Windows. To fix this, we should
* deprecate tree_current_stat() and provide a new
* call tree_populate_entry(t, entry). This call
* would use stat() internally on POSIX and
* GetInfoByFileHandle() internally on Windows.
* This would be another step towards a tree-walker
* that can be integrated deep into libarchive.
* For now, just set st to NULL on Windows;
* archive_read_disk_entry_from_file() should
* be smart enough to use platform-appropriate
* ways to probe file information.
*/
st = NULL;
#endif
r = archive_read_disk_entry_from_file(bsdtar->diskreader,
entry, -1, st);
if (bsdtar->uid >= 0) {
archive_entry_set_uid(entry, bsdtar->uid);
if (!bsdtar->uname)
archive_entry_set_uname(entry,
archive_read_disk_uname(bsdtar->diskreader,
bsdtar->uid));
}
if (bsdtar->gid >= 0) {
archive_entry_set_gid(entry, bsdtar->gid);
if (!bsdtar->gname)
archive_entry_set_gname(entry,
archive_read_disk_gname(bsdtar->diskreader,
bsdtar->gid));
}
if (bsdtar->uname)
archive_entry_set_uname(entry, bsdtar->uname);
if (bsdtar->gname)
archive_entry_set_gname(entry, bsdtar->gname);
if (r != ARCHIVE_OK)
lafe_warnc(archive_errno(bsdtar->diskreader),
"%s", archive_error_string(bsdtar->diskreader));
if (r < ARCHIVE_WARN)
continue;
/* XXX TODO: Just use flag data from entry; avoid the
* duplicate check here. */
/*
* If this file/dir is flagged "nodump" and we're
* honoring such flags, skip this file/dir.
*/
#if defined(HAVE_STRUCT_STAT_ST_FLAGS) && defined(UF_NODUMP)
/* BSD systems store flags in struct stat */
if (bsdtar->option_honor_nodump &&
(lst->st_flags & UF_NODUMP))
continue;
#endif
#if defined(EXT2_IOC_GETFLAGS) && defined(EXT2_NODUMP_FL)
/* Linux uses ioctl to read flags. */
if (bsdtar->option_honor_nodump) {
int fd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY);
if (fd >= 0) {
unsigned long fflags;
int r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags);
close(fd);
if (r >= 0 && (fflags & EXT2_NODUMP_FL))
continue;
}
}
#endif
#ifdef __APPLE__
if (bsdtar->enable_copyfile) {
/* If we're using copyfile(), ignore "._XXX" files. */
const char *bname = strrchr(name, '/');
if (bname == NULL)
bname = name;
else
++bname;
if (bname[0] == '.' && bname[1] == '_')
continue;
} else {
/* If not, drop the copyfile() data. */
archive_entry_copy_mac_metadata(entry, NULL, 0);
}
#endif
/*
* If the user vetoes this file/directory, skip it.
* We want this to be fairly late; if some other
* check would veto this file, we shouldn't bother
* the user with it.
*/
if (bsdtar->option_interactive &&
!yes("add '%s'", name))
continue;
if (descend)
tree_descend(tree);
/*
* Rewrite the pathname to be archived. If rewrite
* fails, skip the entry.
*/
if (edit_pathname(bsdtar, entry))
continue;
/* Display entry as we process it.
* This format is required by SUSv2. */
if (bsdtar->verbose)
safe_fprintf(stderr, "a %s",
archive_entry_pathname(entry));
/* Non-regular files get archived with zero size. */
if (archive_entry_filetype(entry) != AE_IFREG)
archive_entry_set_size(entry, 0);
archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry);
while (entry != NULL) {
write_file(bsdtar, a, entry);
archive_entry_free(entry);
entry = spare_entry;
spare_entry = NULL;
}
if (bsdtar->verbose)
fprintf(stderr, "\n");
}
archive_entry_free(entry);
tree_close(tree);
}
/*-
* The logic here for -C <dir> attempts to avoid
* chdir() as long as possible. For example:
* "-C /foo -C /bar file" needs chdir("/bar") but not chdir("/foo")
* "-C /foo -C bar file" needs chdir("/foo/bar")
* "-C /foo -C bar /file1" does not need chdir()
* "-C /foo -C bar /file1 file2" needs chdir("/foo/bar") before file2
*
* The only correct way to handle this is to record a "pending" chdir
* request and combine multiple requests intelligently until we
* need to process a non-absolute file. set_chdir() adds the new dir
* to the pending list; do_chdir() actually executes any pending chdir.
*
* This way, programs that build tar command lines don't have to worry
* about -C with non-existent directories; such requests will only
* fail if the directory must be accessed.
*
*/
void
set_chdir(struct bsdtar *bsdtar, const char *newdir)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
if (newdir[0] == '/' || newdir[0] == '\\' ||
/* Detect this type, for example, "C:\" or "C:/" */
(((newdir[0] >= 'a' && newdir[0] <= 'z') ||
(newdir[0] >= 'A' && newdir[0] <= 'Z')) &&
newdir[1] == ':' && (newdir[2] == '/' || newdir[2] == '\\'))) {
#else
if (newdir[0] == '/') {
#endif
/* The -C /foo -C /bar case; dump first one. */
free(bsdtar->pending_chdir);
bsdtar->pending_chdir = NULL;
}
if (bsdtar->pending_chdir == NULL)
/* Easy case: no previously-saved dir. */
bsdtar->pending_chdir = strdup(newdir);
else {
/* The -C /foo -C bar case; concatenate */
char *old_pending = bsdtar->pending_chdir;
size_t old_len = strlen(old_pending);
bsdtar->pending_chdir = malloc(old_len + strlen(newdir) + 2);
if (old_pending[old_len - 1] == '/')
old_pending[old_len - 1] = '\0';
if (bsdtar->pending_chdir != NULL)
sprintf(bsdtar->pending_chdir, "%s/%s",
old_pending, newdir);
free(old_pending);
}
if (bsdtar->pending_chdir == NULL)
lafe_errc(1, errno, "No memory");
}
void
do_chdir(struct bsdtar *bsdtar)
{
if (bsdtar->pending_chdir == NULL)
return;
if (chdir(bsdtar->pending_chdir) != 0) {
lafe_errc(1, 0, "could not chdir to '%s'\n",
bsdtar->pending_chdir);
}
free(bsdtar->pending_chdir);
bsdtar->pending_chdir = NULL;
}
static const char *
strip_components(const char *p, int elements)
{
/* Skip as many elements as necessary. */
while (elements > 0) {
switch (*p++) {
case '/':
#if defined(_WIN32) && !defined(__CYGWIN__)
case '\\': /* Support \ path sep on Windows ONLY. */
#endif
elements--;
break;
case '\0':
/* Path is too short, skip it. */
return (NULL);
}
}
/* Skip any / characters. This handles short paths that have
* additional / termination. This also handles the case where
* the logic above stops in the middle of a duplicate //
* sequence (which would otherwise get converted to an
* absolute path). */
for (;;) {
switch (*p) {
case '/':
#if defined(_WIN32) && !defined(__CYGWIN__)
case '\\': /* Support \ path sep on Windows ONLY. */
#endif
++p;
break;
case '\0':
return (NULL);
default:
return (p);
}
}
}
/*
* Handle --strip-components and any future path-rewriting options.
* Returns non-zero if the pathname should not be extracted.
*
* TODO: Support pax-style regex path rewrites.
*/
int
edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
{
const char *name = archive_entry_pathname(entry);
#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
char *subst_name;
int r;
r = apply_substitution(bsdtar, name, &subst_name, 0, 0);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_pathname(entry, subst_name);
if (*subst_name == '\0') {
free(subst_name);
return -1;
} else
free(subst_name);
name = archive_entry_pathname(entry);
}
if (archive_entry_hardlink(entry)) {
r = apply_substitution(bsdtar, archive_entry_hardlink(entry), &subst_name, 0, 1);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_hardlink(entry, subst_name);
free(subst_name);
}
}
if (archive_entry_symlink(entry) != NULL) {
r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1, 0);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_symlink(entry, subst_name);
free(subst_name);
}
}
#endif
/* Strip leading dir names as per --strip-components option. */
if (bsdtar->strip_components > 0) {
const char *linkname = archive_entry_hardlink(entry);
name = strip_components(name, bsdtar->strip_components);
if (name == NULL)
return (1);
if (linkname != NULL) {
linkname = strip_components(linkname,
bsdtar->strip_components);
if (linkname == NULL)
return (1);
archive_entry_copy_hardlink(entry, linkname);
}
}
/* By default, don't write or restore absolute pathnames. */
if (!bsdtar->option_absolute_paths) {
const char *rp, *p = name;
int slashonly = 1;
/* Remove leading "//./" or "//?/" or "//?/UNC/"
* (absolute path prefixes used by Windows API) */
if ((p[0] == '/' || p[0] == '\\') &&
(p[1] == '/' || p[1] == '\\') &&
(p[2] == '.' || p[2] == '?') &&
(p[3] == '/' || p[3] == '\\'))
{
if (p[2] == '?' &&
(p[4] == 'U' || p[4] == 'u') &&
(p[5] == 'N' || p[5] == 'n') &&
(p[6] == 'C' || p[6] == 'c') &&
(p[7] == '/' || p[7] == '\\'))
p += 8;
else
p += 4;
slashonly = 0;
}
do {
rp = p;
/* Remove leading drive letter from archives created
* on Windows. */
if (((p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= 'A' && p[0] <= 'Z')) &&
p[1] == ':') {
p += 2;
slashonly = 0;
}
/* Remove leading "/../", "//", etc. */
while (p[0] == '/' || p[0] == '\\') {
if (p[1] == '.' && p[2] == '.' &&
(p[3] == '/' || p[3] == '\\')) {
p += 3; /* Remove "/..", leave "/"
* for next pass. */
slashonly = 0;
} else
p += 1; /* Remove "/". */
}
} while (rp != p);
if (p != name && !bsdtar->warned_lead_slash) {
/* Generate a warning the first time this happens. */
if (slashonly)
lafe_warnc(0,
"Removing leading '%c' from member names",
name[0]);
else
lafe_warnc(0,
"Removing leading drive letter from "
"member names");
bsdtar->warned_lead_slash = 1;
}
/* Special case: Stripping everything yields ".". */
if (*p == '\0')
name = ".";
else
name = p;
} else {
/* Strip redundant leading '/' characters. */
while (name[0] == '/' && name[1] == '/')
name++;
}
/* Safely replace name in archive_entry. */
if (name != archive_entry_pathname(entry)) {
char *q = strdup(name);
archive_entry_copy_pathname(entry, q);
free(q);
}
return (0);
}
/*
* It would be nice to just use printf() for formatting large numbers,
* but the compatibility problems are quite a headache. Hence the
* following simple utility function.
*/
const char *
tar_i64toa(int64_t n0)
{
static char buff[24];
uint64_t n = n0 < 0 ? -n0 : n0;
char *p = buff + sizeof(buff);
*--p = '\0';
do {
*--p = '0' + (int)(n % 10);
} while (n /= 10);
if (n0 < 0)
*--p = '-';
return p;
}
/*
* Like strcmp(), but try to be a little more aware of the fact that
* we're comparing two paths. Right now, it just handles leading
* "./" and trailing '/' specially, so that "a/b/" == "./a/b"
*
* TODO: Make this better, so that "./a//b/./c/" == "a/b/c"
* TODO: After this works, push it down into libarchive.
* TODO: Publish the path normalization routines in libarchive so
* that bsdtar can normalize paths and use fast strcmp() instead
* of this.
*
* Note: This is currently only used within write.c, so should
* not handle \ path separators.
*/
int
pathcmp(const char *a, const char *b)
{
/* Skip leading './' */
if (a[0] == '.' && a[1] == '/' && a[2] != '\0')
a += 2;
if (b[0] == '.' && b[1] == '/' && b[2] != '\0')
b += 2;
/* Find the first difference, or return (0) if none. */
while (*a == *b) {
if (*a == '\0')
return (0);
a++;
b++;
}
/*
* If one ends in '/' and the other one doesn't,
* they're the same.
*/
if (a[0] == '/' && a[1] == '\0' && b[0] == '\0')
return (0);
if (a[0] == '\0' && b[0] == '/' && b[1] == '\0')
return (0);
/* They're really different, return the correct sign. */
return (*(const unsigned char *)a - *(const unsigned char *)b);
}
/*
* Write user-specified files/dirs to opened archive.
*/
static void
write_archive(struct archive *a, struct bsdtar *bsdtar)
{
const char *arg;
struct archive_entry *entry, *sparse_entry;
/* Choose a suitable copy buffer size */
bsdtar->buff_size = 64 * 1024;
while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block)
bsdtar->buff_size *= 2;
/* Try to compensate for space we'll lose to alignment. */
bsdtar->buff_size += 16 * 1024;
/* Allocate a buffer for file data. */
if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL)
lafe_errc(1, 0, "cannot allocate memory");
if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
lafe_errc(1, 0, "cannot create link resolver");
archive_entry_linkresolver_set_strategy(bsdtar->resolver,
archive_format(a));
/* Create a read_disk object. */
if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
lafe_errc(1, 0, "Cannot create read_disk object");
/* Tell the read_disk how handle symlink. */
switch (bsdtar->symlink_mode) {
case 'H':
archive_read_disk_set_symlink_hybrid(bsdtar->diskreader);
break;
case 'L':
archive_read_disk_set_symlink_logical(bsdtar->diskreader);
break;
default:
archive_read_disk_set_symlink_physical(bsdtar->diskreader);
break;
}
/* Register entry filters. */
archive_read_disk_set_matching(bsdtar->diskreader,
bsdtar->matching, excluded_callback, bsdtar);
archive_read_disk_set_metadata_filter_callback(
bsdtar->diskreader, metadata_filter, bsdtar);
/* Set the behavior of archive_read_disk. */
archive_read_disk_set_behavior(bsdtar->diskreader,
bsdtar->readdisk_flags);
archive_read_disk_set_standard_lookup(bsdtar->diskreader);
if (bsdtar->names_from_file != NULL)
archive_names_from_file(bsdtar, a);
while (*bsdtar->argv) {
arg = *bsdtar->argv;
if (arg[0] == '-' && arg[1] == 'C') {
arg += 2;
if (*arg == '\0') {
bsdtar->argv++;
arg = *bsdtar->argv;
if (arg == NULL) {
lafe_warnc(0, "%s",
"Missing argument for -C");
bsdtar->return_value = 1;
goto cleanup;
}
if (*arg == '\0') {
lafe_warnc(0,
"Meaningless argument for -C: ''");
bsdtar->return_value = 1;
goto cleanup;
}
}
set_chdir(bsdtar, arg);
} else {
if (*arg != '/' && (arg[0] != '@' || arg[1] != '/'))
do_chdir(bsdtar); /* Handle a deferred -C */
if (*arg == '@') {
if (append_archive_filename(bsdtar, a,
arg + 1) != 0)
break;
} else
write_hierarchy(bsdtar, a, arg);
}
bsdtar->argv++;
}
archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL);
archive_read_disk_set_metadata_filter_callback(
bsdtar->diskreader, NULL, NULL);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
while (entry != NULL) {
int r;
struct archive_entry *entry2;
struct archive *disk = bsdtar->diskreader;
/*
* This tricky code here is to correctly read the cotents
* of the entry because the disk reader bsdtar->diskreader
* is pointing at does not have any information about the
* entry by this time and using archive_read_data_block()
* with the disk reader consequently must fail. And we
* have to re-open the entry to read the contents.
*/
/* TODO: Work with -C option as well. */
r = archive_read_disk_open(disk,
archive_entry_sourcepath(entry));
if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(disk),
"%s", archive_error_string(disk));
bsdtar->return_value = 1;
archive_entry_free(entry);
continue;
}
/*
* Invoke archive_read_next_header2() to work
* archive_read_data_block(), which is called via write_file(),
* without failure.
*/
entry2 = archive_entry_new();
r = archive_read_next_header2(disk, entry2);
archive_entry_free(entry2);
if (r != ARCHIVE_OK) {
lafe_warnc(archive_errno(disk),
"%s", archive_error_string(disk));
if (r == ARCHIVE_FATAL)
bsdtar->return_value = 1;
else
archive_read_close(disk);
archive_entry_free(entry);
continue;
}
write_file(bsdtar, a, entry);
archive_entry_free(entry);
archive_read_close(disk);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
}
if (archive_write_close(a)) {
lafe_warnc(0, "%s", archive_error_string(a));
bsdtar->return_value = 1;
}
cleanup:
/* Free file data buffer. */
free(bsdtar->buff);
archive_entry_linkresolver_free(bsdtar->resolver);
bsdtar->resolver = NULL;
archive_read_free(bsdtar->diskreader);
bsdtar->diskreader = NULL;
if (bsdtar->option_totals) {
fprintf(stderr, "Total bytes written: %s\n",
tar_i64toa(archive_filter_bytes(a, -1)));
}
archive_write_free(a);
}
int
main(int argc, char *argv[])
{
static char buff[16384];
struct cpio _cpio; /* Allocated on stack. */
struct cpio *cpio;
const char *errmsg;
int uid, gid;
int opt;
cpio = &_cpio;
memset(cpio, 0, sizeof(*cpio));
cpio->buff = buff;
cpio->buff_size = sizeof(buff);
#if defined(HAVE_SIGACTION) && defined(SIGPIPE)
{ /* Ignore SIGPIPE signals. */
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &sa, NULL);
}
#endif
/* Set lafe_progname before calling lafe_warnc. */
lafe_setprogname(*argv, "bsdcpio");
#if HAVE_SETLOCALE
if (setlocale(LC_ALL, "") == NULL)
lafe_warnc(0, "Failed to set default locale");
#endif
cpio->uid_override = -1;
cpio->gid_override = -1;
cpio->argv = argv;
cpio->argc = argc;
cpio->mode = '\0';
cpio->verbose = 0;
cpio->compress = '\0';
cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
#if !defined(_WIN32) && !defined(__CYGWIN__)
if (geteuid() == 0)
cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
#endif
cpio->bytes_per_block = 512;
cpio->filename = NULL;
cpio->matching = archive_match_new();
if (cpio->matching == NULL)
lafe_errc(1, 0, "Out of memory");
while ((opt = cpio_getopt(cpio)) != -1) {
switch (opt) {
case '0': /* GNU convention: --null, -0 */
cpio->option_null = 1;
break;
case 'A': /* NetBSD/OpenBSD */
cpio->option_append = 1;
break;
case 'a': /* POSIX 1997 */
cpio->option_atime_restore = 1;
break;
case 'B': /* POSIX 1997 */
cpio->bytes_per_block = 5120;
break;
case OPTION_B64ENCODE:
cpio->add_filter = opt;
break;
case 'C': /* NetBSD/OpenBSD */
cpio->bytes_per_block = atoi(cpio->argument);
if (cpio->bytes_per_block <= 0)
lafe_errc(1, 0, "Invalid blocksize %s", cpio->argument);
break;
case 'c': /* POSIX 1997 */
cpio->format = "odc";
break;
case 'd': /* POSIX 1997 */
cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
break;
case 'E': /* NetBSD/OpenBSD */
if (archive_match_include_pattern_from_file(
cpio->matching, cpio->argument,
cpio->option_null) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(cpio->matching));
break;
case 'F': /* NetBSD/OpenBSD/GNU cpio */
cpio->filename = cpio->argument;
break;
case 'f': /* POSIX 1997 */
if (archive_match_exclude_pattern(cpio->matching,
cpio->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(cpio->matching));
break;
case OPTION_GRZIP:
cpio->compress = opt;
break;
case 'H': /* GNU cpio (also --format) */
cpio->format = cpio->argument;
break;
case 'h':
long_help();
break;
case 'I': /* NetBSD/OpenBSD */
cpio->filename = cpio->argument;
break;
case 'i': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -i and -%c", cpio->mode);
cpio->mode = opt;
break;
case 'J': /* GNU tar, others */
cpio->compress = opt;
break;
case 'j': /* GNU tar, others */
cpio->compress = opt;
break;
case OPTION_INSECURE:
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
break;
case 'L': /* GNU cpio */
cpio->option_follow_links = 1;
break;
case 'l': /* POSIX 1997 */
cpio->option_link = 1;
break;
case OPTION_LRZIP:
case OPTION_LZMA: /* GNU tar, others */
case OPTION_LZOP: /* GNU tar, others */
cpio->compress = opt;
break;
case 'm': /* POSIX 1997 */
cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
break;
case 'n': /* GNU cpio */
cpio->option_numeric_uid_gid = 1;
break;
case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case 'O': /* GNU cpio */
cpio->filename = cpio->argument;
break;
case 'o': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -o and -%c", cpio->mode);
cpio->mode = opt;
break;
case 'p': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -p and -%c", cpio->mode);
cpio->mode = opt;
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
break;
case OPTION_PRESERVE_OWNER:
cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_QUIET: /* GNU cpio */
cpio->quiet = 1;
break;
case 'R': /* GNU cpio, also --owner */
/* TODO: owner_parse should return uname/gname
* also; use that to set [ug]name_override. */
errmsg = owner_parse(cpio->argument, &uid, &gid);
if (errmsg) {
lafe_warnc(-1, "%s", errmsg);
usage();
}
if (uid != -1) {
cpio->uid_override = uid;
cpio->uname_override = NULL;
}
if (gid != -1) {
cpio->gid_override = gid;
cpio->gname_override = NULL;
}
break;
case 'r': /* POSIX 1997 */
cpio->option_rename = 1;
break;
case 't': /* POSIX 1997 */
cpio->option_list = 1;
break;
case 'u': /* POSIX 1997 */
cpio->extract_flags
&= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
break;
case OPTION_UUENCODE:
cpio->add_filter = opt;
break;
case 'v': /* POSIX 1997 */
cpio->verbose++;
break;
case 'V': /* GNU cpio */
cpio->dot++;
break;
case OPTION_VERSION: /* GNU convention */
version();
break;
#if 0
/*
* cpio_getopt() handles -W specially, so it's not
* available here.
*/
case 'W': /* Obscure, but useful GNU convention. */
break;
#endif
case 'y': /* tar convention */
cpio->compress = opt;
break;
case 'Z': /* tar convention */
cpio->compress = opt;
break;
case 'z': /* tar convention */
cpio->compress = opt;
break;
default:
usage();
}
}
/*
* Sanity-check args, error out on nonsensical combinations.
*/
/* -t implies -i if no mode was specified. */
if (cpio->option_list && cpio->mode == '\0')
cpio->mode = 'i';
/* -t requires -i */
if (cpio->option_list && cpio->mode != 'i')
lafe_errc(1, 0, "Option -t requires -i");
/* -n requires -it */
if (cpio->option_numeric_uid_gid && !cpio->option_list)
lafe_errc(1, 0, "Option -n requires -it");
/* Can only specify format when writing */
if (cpio->format != NULL && cpio->mode != 'o')
lafe_errc(1, 0, "Option --format requires -o");
/* -l requires -p */
if (cpio->option_link && cpio->mode != 'p')
lafe_errc(1, 0, "Option -l requires -p");
/* -v overrides -V */
if (cpio->dot && cpio->verbose)
cpio->dot = 0;
/* TODO: Flag other nonsensical combinations. */
switch (cpio->mode) {
case 'o':
/* TODO: Implement old binary format in libarchive,
use that here. */
if (cpio->format == NULL)
cpio->format = "odc"; /* Default format */
mode_out(cpio);
break;
case 'i':
while (*cpio->argv != NULL) {
if (archive_match_include_pattern(cpio->matching,
*cpio->argv) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(cpio->matching));
--cpio->argc;
++cpio->argv;
}
if (cpio->option_list)
mode_list(cpio);
else
mode_in(cpio);
break;
case 'p':
if (*cpio->argv == NULL || **cpio->argv == '\0')
lafe_errc(1, 0,
"-p mode requires a target directory");
mode_pass(cpio, *cpio->argv);
break;
default:
lafe_errc(1, 0,
"Must specify at least one of -i, -o, or -p");
}
archive_match_free(cpio->matching);
free_cache(cpio->gname_cache);
free_cache(cpio->uname_cache);
free(cpio->destdir);
return (cpio->return_value);
}
/*
* Handle --strip-components and any future path-rewriting options.
* Returns non-zero if the pathname should not be extracted.
*
* TODO: Support pax-style regex path rewrites.
*/
int
edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
{
const char *name = archive_entry_pathname(entry);
#if HAVE_REGEX_H
char *subst_name;
int r;
#endif
#if HAVE_REGEX_H
r = apply_substitution(bsdtar, name, &subst_name, 0);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_pathname(entry, subst_name);
if (*subst_name == '\0') {
free(subst_name);
return -1;
} else
free(subst_name);
name = archive_entry_pathname(entry);
}
if (archive_entry_hardlink(entry)) {
r = apply_substitution(bsdtar, archive_entry_hardlink(entry), &subst_name, 1);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_hardlink(entry, subst_name);
free(subst_name);
}
}
if (archive_entry_symlink(entry) != NULL) {
r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1);
if (r == -1) {
lafe_warnc(0, "Invalid substitution, skipping entry");
return 1;
}
if (r == 1) {
archive_entry_copy_symlink(entry, subst_name);
free(subst_name);
}
}
#endif
/* Strip leading dir names as per --strip-components option. */
if (bsdtar->strip_components > 0) {
const char *linkname = archive_entry_hardlink(entry);
name = strip_components(name, bsdtar->strip_components);
if (name == NULL)
return (1);
if (linkname != NULL) {
linkname = strip_components(linkname,
bsdtar->strip_components);
if (linkname == NULL)
return (1);
archive_entry_copy_hardlink(entry, linkname);
}
}
/* By default, don't write or restore absolute pathnames. */
if (!bsdtar->option_absolute_paths) {
const char *rp, *p = name;
int slashonly = 1;
/* Remove leading "//./" or "//?/" or "//?/UNC/"
* (absolute path prefixes used by Windows API) */
if ((p[0] == '/' || p[0] == '\\') &&
(p[1] == '/' || p[1] == '\\') &&
(p[2] == '.' || p[2] == '?') &&
(p[3] == '/' || p[3] == '\\'))
{
if (p[2] == '?' &&
(p[4] == 'U' || p[4] == 'u') &&
(p[5] == 'N' || p[5] == 'n') &&
(p[6] == 'C' || p[6] == 'c') &&
(p[7] == '/' || p[7] == '\\'))
p += 8;
else
p += 4;
slashonly = 0;
}
do {
rp = p;
/* Remove leading drive letter from archives created
* on Windows. */
if (((p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= 'A' && p[0] <= 'Z')) &&
p[1] == ':') {
p += 2;
slashonly = 0;
}
/* Remove leading "/../", "//", etc. */
while (p[0] == '/' || p[0] == '\\') {
if (p[1] == '.' && p[2] == '.' &&
(p[3] == '/' || p[3] == '\\')) {
p += 3; /* Remove "/..", leave "/"
* for next pass. */
slashonly = 0;
} else
p += 1; /* Remove "/". */
}
} while (rp != p);
if (p != name && !bsdtar->warned_lead_slash) {
/* Generate a warning the first time this happens. */
if (slashonly)
lafe_warnc(0,
"Removing leading '%c' from member names",
name[0]);
else
lafe_warnc(0,
"Removing leading drive letter from "
"member names");
bsdtar->warned_lead_slash = 1;
}
/* Special case: Stripping everything yields ".". */
if (*p == '\0')
name = ".";
else
name = p;
} else {
/* Strip redundant leading '/' characters. */
while (name[0] == '/' && name[1] == '/')
name++;
}
/* Safely replace name in archive_entry. */
if (name != archive_entry_pathname(entry)) {
char *q = strdup(name);
archive_entry_copy_pathname(entry, q);
free(q);
}
return (0);
}
static int
entry_to_archive(struct cpio *cpio, struct archive_entry *entry)
{
const char *destpath = archive_entry_pathname(entry);
const char *srcpath = archive_entry_sourcepath(entry);
int fd = -1;
ssize_t bytes_read;
int r;
/* Print out the destination name to the user. */
if (cpio->verbose)
fprintf(stderr,"%s", destpath);
/*
* Option_link only makes sense in pass mode and for
* regular files. Also note: if a link operation fails
* because of cross-device restrictions, we'll fall back
* to copy mode for that entry.
*
* TODO: Test other cpio implementations to see if they
* hard-link anything other than regular files here.
*/
if (cpio->option_link
&& archive_entry_filetype(entry) == AE_IFREG)
{
struct archive_entry *t;
/* Save the original entry in case we need it later. */
t = archive_entry_clone(entry);
if (t == NULL)
lafe_errc(1, ENOMEM, "Can't create link");
/* Note: link(2) doesn't create parent directories,
* so we use archive_write_header() instead as a
* convenience. */
archive_entry_set_hardlink(t, srcpath);
/* This is a straight link that carries no data. */
archive_entry_set_size(t, 0);
r = archive_write_header(cpio->archive, t);
archive_entry_free(t);
if (r != ARCHIVE_OK)
lafe_warnc(archive_errno(cpio->archive),
"%s", archive_error_string(cpio->archive));
if (r == ARCHIVE_FATAL)
exit(1);
#ifdef EXDEV
if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {
/* Cross-device link: Just fall through and use
* the original entry to copy the file over. */
lafe_warnc(0, "Copying file instead");
} else
#endif
return (0);
}
/*
* Make sure we can open the file (if necessary) before
* trying to write the header.
*/
if (archive_entry_filetype(entry) == AE_IFREG) {
if (archive_entry_size(entry) > 0) {
fd = open(srcpath, O_RDONLY | O_BINARY);
if (fd < 0) {
lafe_warnc(errno,
"%s: could not open file", srcpath);
goto cleanup;
}
}
} else {
archive_entry_set_size(entry, 0);
}
r = archive_write_header(cpio->archive, entry);
if (r != ARCHIVE_OK)
lafe_warnc(archive_errno(cpio->archive),
"%s: %s",
srcpath,
archive_error_string(cpio->archive));
if (r == ARCHIVE_FATAL)
exit(1);
if (r >= ARCHIVE_WARN && fd >= 0) {
bytes_read = read(fd, cpio->buff, cpio->buff_size);
while (bytes_read > 0) {
r = archive_write_data(cpio->archive,
cpio->buff, bytes_read);
if (r < 0)
lafe_errc(1, archive_errno(cpio->archive),
"%s", archive_error_string(cpio->archive));
if (r < bytes_read) {
lafe_warnc(0,
"Truncated write; file may have grown while being archived.");
}
bytes_read = read(fd, cpio->buff, cpio->buff_size);
}
}
fd = restore_time(cpio, entry, srcpath, fd);
cleanup:
if (cpio->verbose)
fprintf(stderr,"\n");
if (fd >= 0)
close(fd);
return (0);
}
/*
* This is used by both out mode (to copy objects from disk into
* an archive) and pass mode (to copy objects from disk to
* an archive_write_disk "archive").
*/
static int
file_to_archive(struct cpio *cpio, const char *srcpath)
{
const char *destpath;
struct archive_entry *entry, *spare;
size_t len;
const char *p;
int r;
/*
* Create an archive_entry describing the source file.
*
*/
entry = archive_entry_new();
if (entry == NULL)
lafe_errc(1, 0, "Couldn't allocate entry");
archive_entry_copy_sourcepath(entry, srcpath);
r = archive_read_disk_entry_from_file(cpio->archive_read_disk,
entry, -1, NULL);
if (r < ARCHIVE_FAILED)
lafe_errc(1, 0, "%s",
archive_error_string(cpio->archive_read_disk));
if (r < ARCHIVE_OK)
lafe_warnc(0, "%s",
archive_error_string(cpio->archive_read_disk));
if (r <= ARCHIVE_FAILED) {
cpio->return_value = 1;
return (r);
}
if (cpio->uid_override >= 0)
archive_entry_set_uid(entry, cpio->uid_override);
if (cpio->gid_override >= 0)
archive_entry_set_gid(entry, cpio->gid_override);
/*
* Generate a destination path for this entry.
* "destination path" is the name to which it will be copied in
* pass mode or the name that will go into the archive in
* output mode.
*/
destpath = srcpath;
if (cpio->destdir) {
len = strlen(cpio->destdir) + strlen(srcpath) + 8;
if (len >= cpio->pass_destpath_alloc) {
while (len >= cpio->pass_destpath_alloc) {
cpio->pass_destpath_alloc += 512;
cpio->pass_destpath_alloc *= 2;
}
free(cpio->pass_destpath);
cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);
if (cpio->pass_destpath == NULL)
lafe_errc(1, ENOMEM,
"Can't allocate path buffer");
}
strcpy(cpio->pass_destpath, cpio->destdir);
p = srcpath;
while (p[0] == '/')
++p;
strcat(cpio->pass_destpath, p);
destpath = cpio->pass_destpath;
}
if (cpio->option_rename)
destpath = cpio_rename(destpath);
if (destpath == NULL)
return (0);
archive_entry_copy_pathname(entry, destpath);
/*
* If we're trying to preserve hardlinks, match them here.
*/
spare = NULL;
if (cpio->linkresolver != NULL
&& archive_entry_filetype(entry) != AE_IFDIR) {
archive_entry_linkify(cpio->linkresolver, &entry, &spare);
}
if (entry != NULL) {
r = entry_to_archive(cpio, entry);
archive_entry_free(entry);
if (spare != NULL) {
if (r == 0)
r = entry_to_archive(cpio, spare);
archive_entry_free(spare);
}
}
return (r);
}
/*
* Write user-specified files/dirs to opened archive.
*/
static void
write_archive(struct archive *a, struct bsdtar *bsdtar)
{
const char *arg;
struct archive_entry *entry, *sparse_entry;
/* Choose a suitable copy buffer size */
bsdtar->buff_size = 64 * 1024;
while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block)
bsdtar->buff_size *= 2;
/* Try to compensate for space we'll lose to alignment. */
bsdtar->buff_size += 16 * 1024;
/* Allocate a buffer for file data. */
if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL)
lafe_errc(1, 0, "cannot allocate memory");
if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
lafe_errc(1, 0, "cannot create link resolver");
archive_entry_linkresolver_set_strategy(bsdtar->resolver,
archive_format(a));
if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
lafe_errc(1, 0, "Cannot create read_disk object");
archive_read_disk_set_standard_lookup(bsdtar->diskreader);
if (bsdtar->names_from_file != NULL)
archive_names_from_file(bsdtar, a);
while (*bsdtar->argv) {
arg = *bsdtar->argv;
if (arg[0] == '-' && arg[1] == 'C') {
arg += 2;
if (*arg == '\0') {
bsdtar->argv++;
arg = *bsdtar->argv;
if (arg == NULL) {
lafe_warnc(0, "%s",
"Missing argument for -C");
bsdtar->return_value = 1;
goto cleanup;
}
if (*arg == '\0') {
lafe_warnc(0,
"Meaningless argument for -C: ''");
bsdtar->return_value = 1;
goto cleanup;
}
}
set_chdir(bsdtar, arg);
} else {
if (*arg != '/' && (arg[0] != '@' || arg[1] != '/'))
do_chdir(bsdtar); /* Handle a deferred -C */
if (*arg == '@') {
if (append_archive_filename(bsdtar, a,
arg + 1) != 0)
break;
} else
write_hierarchy(bsdtar, a, arg);
}
bsdtar->argv++;
}
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
while (entry != NULL) {
write_file(bsdtar, a, entry);
archive_entry_free(entry);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
}
if (archive_write_close(a)) {
lafe_warnc(0, "%s", archive_error_string(a));
bsdtar->return_value = 1;
}
cleanup:
/* Free file data buffer. */
free(bsdtar->buff);
archive_entry_linkresolver_free(bsdtar->resolver);
bsdtar->resolver = NULL;
archive_read_free(bsdtar->diskreader);
bsdtar->diskreader = NULL;
if (bsdtar->option_totals) {
fprintf(stderr, "Total bytes written: %s\n",
tar_i64toa(archive_position_compressed(a)));
}
archive_write_free(a);
}
int
main(int argc, char **argv)
{
struct bsdtar *bsdtar, bsdtar_storage;
int opt, t;
char compression, compression2;
const char *compression_name, *compression2_name;
const char *compress_program;
char option_a, option_o;
char possible_help_request;
char buff[16];
/*
* Use a pointer for consistency, but stack-allocated storage
* for ease of cleanup.
*/
bsdtar = &bsdtar_storage;
memset(bsdtar, 0, sizeof(*bsdtar));
bsdtar->fd = -1; /* Mark as "unused" */
bsdtar->gid = -1;
bsdtar->uid = -1;
option_a = option_o = 0;
compression = compression2 = '\0';
compression_name = compression2_name = NULL;
compress_program = NULL;
#if defined(HAVE_SIGACTION)
{ /* Set up signal handling. */
struct sigaction sa;
sa.sa_handler = siginfo_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
#ifdef SIGINFO
if (sigaction(SIGINFO, &sa, NULL))
lafe_errc(1, errno, "sigaction(SIGINFO) failed");
#endif
#ifdef SIGUSR1
/* ... and treat SIGUSR1 the same way as SIGINFO. */
if (sigaction(SIGUSR1, &sa, NULL))
lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
#endif
#ifdef SIGPIPE
/* Ignore SIGPIPE signals. */
sa.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &sa, NULL);
#endif
}
#endif
/* Set lafe_progname before calling lafe_warnc. */
lafe_setprogname(*argv, "bsdtar");
#if HAVE_SETLOCALE
if (setlocale(LC_ALL, "") == NULL)
lafe_warnc(0, "Failed to set default locale");
#endif
#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
#endif
possible_help_request = 0;
/* Look up uid of current user for future reference */
bsdtar->user_uid = geteuid();
/* Default: open tape drive. */
bsdtar->filename = getenv("TAPE");
if (bsdtar->filename == NULL)
bsdtar->filename = _PATH_DEFTAPE;
/* Default block size settings. */
bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK;
/* Allow library to default this unless user specifies -b. */
bsdtar->bytes_in_last_block = -1;
/* Default: preserve mod time on extract */
bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
/* Default: Perform basic security checks. */
bsdtar->extract_flags |= SECURITY;
#ifndef _WIN32
/* On POSIX systems, assume --same-owner and -p when run by
* the root user. This doesn't make any sense on Windows. */
if (bsdtar->user_uid == 0) {
/* --same-owner */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
/* -p */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
}
#endif
/*
* Enable Mac OS "copyfile()" extension by default.
* This has no effect on other platforms.
*/
bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
#ifdef COPYFILE_DISABLE_VAR
if (getenv(COPYFILE_DISABLE_VAR))
bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
#endif
bsdtar->matching = archive_match_new();
if (bsdtar->matching == NULL)
lafe_errc(1, errno, "Out of memory");
bsdtar->cset = cset_new();
if (bsdtar->cset == NULL)
lafe_errc(1, errno, "Out of memory");
bsdtar->argv = argv;
bsdtar->argc = argc;
/*
* Comments following each option indicate where that option
* originated: SUSv2, POSIX, GNU tar, star, etc. If there's
* no such comment, then I don't know of anyone else who
* implements that option.
*/
while ((opt = bsdtar_getopt(bsdtar)) != -1) {
switch (opt) {
case 'a': /* GNU tar */
option_a = 1; /* Record it and resolve it later. */
break;
case 'B': /* GNU tar */
/* libarchive doesn't need this; just ignore it. */
break;
case 'b': /* SUSv2 */
t = atoi(bsdtar->argument);
if (t <= 0 || t > 8192)
lafe_errc(1, 0,
"Argument to -b is out of range (1..8192)");
bsdtar->bytes_per_block = 512 * t;
/* Explicit -b forces last block size. */
bsdtar->bytes_in_last_block = bsdtar->bytes_per_block;
break;
case OPTION_B64ENCODE:
if (compression2 != '\0')
lafe_errc(1, 0,
"Can't specify both --uuencode and "
"--b64encode");
compression2 = opt;
compression2_name = "b64encode";
break;
case 'C': /* GNU tar */
if (strlen(bsdtar->argument) == 0)
lafe_errc(1, 0,
"Meaningless option: -C ''");
set_chdir(bsdtar, bsdtar->argument);
break;
case 'c': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case OPTION_CHECK_LINKS: /* GNU tar */
bsdtar->option_warn_links = 1;
break;
case OPTION_CHROOT: /* NetBSD */
bsdtar->option_chroot = 1;
break;
case OPTION_DISABLE_COPYFILE: /* Mac OS X */
bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
break;
case OPTION_EXCLUDE: /* GNU tar */
if (archive_match_exclude_pattern(
bsdtar->matching, bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0,
"Couldn't exclude %s\n", bsdtar->argument);
break;
case OPTION_FORMAT: /* GNU tar, others */
cset_set_format(bsdtar->cset, bsdtar->argument);
break;
case 'f': /* SUSv2 */
bsdtar->filename = bsdtar->argument;
break;
case OPTION_GID: /* cpio */
t = atoi(bsdtar->argument);
if (t < 0)
lafe_errc(1, 0,
"Argument to --gid must be positive");
bsdtar->gid = t;
break;
case OPTION_GNAME: /* cpio */
bsdtar->gname = bsdtar->argument;
break;
case OPTION_GRZIP:
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "grzip";
break;
case 'H': /* BSD convention */
bsdtar->symlink_mode = 'H';
break;
case 'h': /* Linux Standards Base, gtar; synonym for -L */
bsdtar->symlink_mode = 'L';
/* Hack: -h by itself is the "help" command. */
possible_help_request = 1;
break;
case OPTION_HELP: /* GNU tar, others */
long_help();
exit(0);
break;
case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */
bsdtar->extract_flags |=
ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED;
break;
case OPTION_IGNORE_ZEROS:
bsdtar->option_ignore_zeros = 1;
break;
case 'I': /* GNU tar */
/*
* TODO: Allow 'names' to come from an archive,
* not just a text file. Design a good UI for
* allowing names and mode/owner to be read
* from an archive, with contents coming from
* disk. This can be used to "refresh" an
* archive or to design archives with special
* permissions without having to create those
* permissions on disk.
*/
bsdtar->names_from_file = bsdtar->argument;
break;
case OPTION_INCLUDE:
/*
* No one else has the @archive extension, so
* no one else needs this to filter entries
* when transforming archives.
*/
if (archive_match_include_pattern(bsdtar->matching,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0,
"Failed to add %s to inclusion list",
bsdtar->argument);
break;
case 'j': /* GNU tar */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "bzip2";
break;
case 'J': /* GNU tar 1.21 and later */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "xz";
break;
case 'k': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
break;
case OPTION_KEEP_NEWER_FILES: /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
break;
case 'L': /* BSD convention */
bsdtar->symlink_mode = 'L';
break;
case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
/* GNU tar 1.13 used -l for --one-file-system */
bsdtar->option_warn_links = 1;
break;
case OPTION_LRZIP:
case OPTION_LZ4:
case OPTION_LZIP: /* GNU tar beginning with 1.23 */
case OPTION_LZMA: /* GNU tar beginning with 1.20 */
case OPTION_LZOP: /* GNU tar beginning with 1.21 */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
switch (opt) {
case OPTION_LRZIP: compression_name = "lrzip"; break;
case OPTION_LZ4: compression_name = "lz4"; break;
case OPTION_LZIP: compression_name = "lzip"; break;
case OPTION_LZMA: compression_name = "lzma"; break;
case OPTION_LZOP: compression_name = "lzop"; break;
}
break;
case 'm': /* SUSv2 */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
break;
case 'n': /* GNU tar */
bsdtar->option_no_subdirs = 1;
break;
/*
* Selecting files by time:
* --newer-?time='date' Only files newer than 'date'
* --newer-?time-than='file' Only files newer than time
* on specified file (useful for incremental backups)
*/
case OPTION_NEWER_CTIME: /* GNU tar */
if (archive_match_include_date(bsdtar->matching,
ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_NEWER_CTIME_THAN:
if (archive_match_include_file_time(bsdtar->matching,
ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_NEWER_MTIME: /* GNU tar */
if (archive_match_include_date(bsdtar->matching,
ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_NEWER_MTIME_THAN:
if (archive_match_include_file_time(bsdtar->matching,
ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_NODUMP: /* star */
bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
break;
case OPTION_NOPRESERVE_HFS_COMPRESSION:
/* Mac OS X v10.6 or later */
bsdtar->extract_flags |=
ARCHIVE_EXTRACT_NO_HFS_COMPRESSION;
break;
case OPTION_NO_SAME_OWNER: /* GNU tar */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
break;
case OPTION_NULL: /* GNU tar */
bsdtar->option_null++;
break;
case OPTION_NUMERIC_OWNER: /* GNU tar */
bsdtar->uname = "";
bsdtar->gname = "";
bsdtar->option_numeric_owner++;
break;
case 'O': /* GNU tar */
bsdtar->option_stdout = 1;
break;
case 'o': /* SUSv2 and GNU conflict here, but not fatally */
option_o = 1; /* Record it and resolve it later. */
break;
/*
* Selecting files by time:
* --older-?time='date' Only files older than 'date'
* --older-?time-than='file' Only files older than time
* on specified file
*/
case OPTION_OLDER_CTIME:
if (archive_match_include_date(bsdtar->matching,
ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_OLDER_CTIME_THAN:
if (archive_match_include_file_time(bsdtar->matching,
ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_OLDER_MTIME:
if (archive_match_include_date(bsdtar->matching,
ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_OLDER_MTIME_THAN:
if (archive_match_include_file_time(bsdtar->matching,
ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
bsdtar->argument) != ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
bsdtar->readdisk_flags |=
ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS;
break;
case OPTION_OPTIONS:
bsdtar->option_options = bsdtar->argument;
break;
#if 0
/*
* The common BSD -P option is not necessary, since
* our default is to archive symlinks, not follow
* them. This is convenient, as -P conflicts with GNU
* tar anyway.
*/
case 'P': /* BSD convention */
/* Default behavior, no option necessary. */
break;
#endif
case 'P': /* GNU tar */
bsdtar->extract_flags &= ~SECURITY;
bsdtar->option_absolute_paths = 1;
break;
case 'p': /* GNU tar, star */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
break;
case OPTION_PASSPHRASE:
bsdtar->passphrase = bsdtar->argument;
break;
case OPTION_POSIX: /* GNU tar */
cset_set_format(bsdtar->cset, "pax");
break;
case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
bsdtar->option_fast_read = 1;
break;
case 'r': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case 'S': /* NetBSD pax-as-tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
break;
case 's': /* NetBSD pax-as-tar */
#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
add_substitution(bsdtar, bsdtar->argument);
#else
lafe_warnc(0,
"-s is not supported by this version of bsdtar");
usage();
#endif
break;
case OPTION_SAME_OWNER: /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
errno = 0;
bsdtar->strip_components = strtol(bsdtar->argument,
NULL, 0);
if (errno)
lafe_errc(1, 0,
"Invalid --strip-components argument: %s",
bsdtar->argument);
break;
case 'T': /* GNU tar */
bsdtar->names_from_file = bsdtar->argument;
break;
case 't': /* SUSv2 */
set_mode(bsdtar, opt);
bsdtar->verbose++;
break;
case OPTION_TOTALS: /* GNU tar */
bsdtar->option_totals++;
break;
case 'U': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
bsdtar->option_unlink_first = 1;
break;
case 'u': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case OPTION_UID: /* cpio */
t = atoi(bsdtar->argument);
if (t < 0)
lafe_errc(1, 0,
"Argument to --uid must be positive");
bsdtar->uid = t;
break;
case OPTION_UNAME: /* cpio */
bsdtar->uname = bsdtar->argument;
break;
case OPTION_UUENCODE:
if (compression2 != '\0')
lafe_errc(1, 0,
"Can't specify both --uuencode and "
"--b64encode");
compression2 = opt;
compression2_name = "uuencode";
break;
case 'v': /* SUSv2 */
bsdtar->verbose++;
break;
case OPTION_VERSION: /* GNU convention */
version();
break;
#if 0
/*
* The -W longopt feature is handled inside of
* bsdtar_getopt(), so -W is not available here.
*/
case 'W': /* Obscure GNU convention. */
break;
#endif
case 'w': /* SUSv2 */
bsdtar->option_interactive = 1;
break;
case 'X': /* GNU tar */
if (archive_match_exclude_pattern_from_file(
bsdtar->matching, bsdtar->argument, 0)
!= ARCHIVE_OK)
lafe_errc(1, 0, "Error : %s",
archive_error_string(bsdtar->matching));
break;
case 'x': /* SUSv2 */
set_mode(bsdtar, opt);
break;
case 'y': /* FreeBSD version of GNU tar */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "bzip2";
break;
case 'Z': /* GNU tar */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "compress";
break;
case 'z': /* GNU tar, star, many others */
if (compression != '\0')
lafe_errc(1, 0,
"Can't specify both -%c and -%c", opt,
compression);
compression = opt;
compression_name = "gzip";
break;
case OPTION_USE_COMPRESS_PROGRAM:
compress_program = bsdtar->argument;
break;
default:
usage();
}
}
/*
* Sanity-check options.
*/
/* If no "real" mode was specified, treat -h as --help. */
if ((bsdtar->mode == '\0') && possible_help_request) {
long_help();
exit(0);
}
/* Otherwise, a mode is required. */
if (bsdtar->mode == '\0')
lafe_errc(1, 0,
"Must specify one of -c, -r, -t, -u, -x");
/* Check boolean options only permitted in certain modes. */
if (option_a)
only_mode(bsdtar, "-a", "c");
if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS)
only_mode(bsdtar, "--one-file-system", "cru");
if (bsdtar->option_fast_read)
only_mode(bsdtar, "--fast-read", "xt");
if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED)
only_mode(bsdtar, "--hfsCompression", "x");
if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION)
only_mode(bsdtar, "--nopreserveHFSCompression", "x");
if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP)
only_mode(bsdtar, "--nodump", "cru");
if (option_o > 0) {
switch (bsdtar->mode) {
case 'c':
/*
* In GNU tar, -o means "old format." The
* "ustar" format is the closest thing
* supported by libarchive.
*/
cset_set_format(bsdtar->cset, "ustar");
/* TODO: bsdtar->create_format = "v7"; */
break;
case 'x':
/* POSIX-compatible behavior. */
bsdtar->option_no_owner = 1;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
default:
only_mode(bsdtar, "-o", "xc");
break;
}
}
if (bsdtar->option_no_subdirs)
only_mode(bsdtar, "-n", "cru");
if (bsdtar->option_stdout)
only_mode(bsdtar, "-O", "xt");
if (bsdtar->option_unlink_first)
only_mode(bsdtar, "-U", "x");
if (bsdtar->option_warn_links)
only_mode(bsdtar, "--check-links", "cr");
if (option_a && cset_auto_compress(bsdtar->cset, bsdtar->filename)) {
/* Ignore specified compressions if auto-compress works. */
compression = '\0';
compression2 = '\0';
}
/* Check other parameters only permitted in certain modes. */
if (compress_program != NULL) {
only_mode(bsdtar, "--use-compress-program", "cxt");
cset_add_filter_program(bsdtar->cset, compress_program);
/* Ignore specified compressions. */
compression = '\0';
compression2 = '\0';
}
if (compression != '\0') {
switch (compression) {
case 'J': case 'j': case 'y': case 'Z': case 'z':
strcpy(buff, "-?");
buff[1] = compression;
break;
default:
strcpy(buff, "--");
strcat(buff, compression_name);
break;
}
only_mode(bsdtar, buff, "cxt");
cset_add_filter(bsdtar->cset, compression_name);
}
if (compression2 != '\0') {
strcpy(buff, "--");
strcat(buff, compression2_name);
only_mode(bsdtar, buff, "cxt");
cset_add_filter(bsdtar->cset, compression2_name);
}
if (cset_get_format(bsdtar->cset) != NULL)
only_mode(bsdtar, "--format", "cru");
if (bsdtar->symlink_mode != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->symlink_mode;
only_mode(bsdtar, buff, "cru");
}
/* Filename "-" implies stdio. */
if (strcmp(bsdtar->filename, "-") == 0)
bsdtar->filename = NULL;
switch(bsdtar->mode) {
case 'c':
tar_mode_c(bsdtar);
break;
case 'r':
tar_mode_r(bsdtar);
break;
case 't':
tar_mode_t(bsdtar);
break;
case 'u':
tar_mode_u(bsdtar);
break;
case 'x':
tar_mode_x(bsdtar);
break;
}
archive_match_free(bsdtar->matching);
#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
cleanup_substitution(bsdtar);
#endif
cset_free(bsdtar->cset);
passphrase_free(bsdtar->ppbuff);
if (bsdtar->return_value != 0)
lafe_warnc(0,
"Error exit delayed from previous errors.");
return (bsdtar->return_value);
}
/*
* Handle 'x' and 't' modes.
*/
static void
read_archive(struct bsdtar *bsdtar, char mode)
{
struct progress_data progress_data;
FILE *out;
struct archive *a;
struct archive_entry *entry;
const struct stat *st;
int r;
while (*bsdtar->argv) {
lafe_include(&bsdtar->matching, *bsdtar->argv);
bsdtar->argv++;
}
if (bsdtar->names_from_file != NULL)
lafe_include_from_file(&bsdtar->matching,
bsdtar->names_from_file, bsdtar->option_null);
a = archive_read_new();
if (bsdtar->compress_program != NULL)
archive_read_support_compression_program(a, bsdtar->compress_program);
else
archive_read_support_compression_all(a);
archive_read_support_format_all(a);
if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options))
lafe_errc(1, 0, "%s", archive_error_string(a));
if (archive_read_open_file(a, bsdtar->filename,
bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
DEFAULT_BYTES_PER_BLOCK))
lafe_errc(1, 0, "Error opening archive: %s",
archive_error_string(a));
do_chdir(bsdtar);
if (mode == 'x') {
/* Set an extract callback so that we can handle SIGINFO. */
progress_data.bsdtar = bsdtar;
progress_data.archive = a;
archive_read_extract_set_progress_callback(a, progress_func,
&progress_data);
}
if (mode == 'x' && bsdtar->option_chroot) {
#if HAVE_CHROOT
if (chroot(".") != 0)
lafe_errc(1, errno, "Can't chroot to \".\"");
#else
lafe_errc(1, 0,
"chroot isn't supported on this platform");
#endif
}
for (;;) {
/* Support --fast-read option */
if (bsdtar->option_fast_read &&
lafe_unmatched_inclusions(bsdtar->matching) == 0)
break;
r = archive_read_next_header(a, &entry);
progress_data.entry = entry;
if (r == ARCHIVE_EOF)
break;
if (r < ARCHIVE_OK)
lafe_warnc(0, "%s", archive_error_string(a));
if (r <= ARCHIVE_WARN)
bsdtar->return_value = 1;
if (r == ARCHIVE_RETRY) {
/* Retryable error: try again */
lafe_warnc(0, "Retrying...");
continue;
}
if (r == ARCHIVE_FATAL)
break;
if (bsdtar->uid >= 0) {
archive_entry_set_uid(entry, bsdtar->uid);
archive_entry_set_uname(entry, NULL);
}
if (bsdtar->gid >= 0) {
archive_entry_set_gid(entry, bsdtar->gid);
archive_entry_set_gname(entry, NULL);
}
if (bsdtar->uname)
archive_entry_set_uname(entry, bsdtar->uname);
if (bsdtar->gname)
archive_entry_set_gname(entry, bsdtar->gname);
/*
* Exclude entries that are too old.
*/
st = archive_entry_stat(entry);
if (bsdtar->newer_ctime_sec > 0) {
if (st->st_ctime < bsdtar->newer_ctime_sec)
continue; /* Too old, skip it. */
if (st->st_ctime == bsdtar->newer_ctime_sec
&& ARCHIVE_STAT_CTIME_NANOS(st)
<= bsdtar->newer_ctime_nsec)
continue; /* Too old, skip it. */
}
if (bsdtar->newer_mtime_sec > 0) {
if (st->st_mtime < bsdtar->newer_mtime_sec)
continue; /* Too old, skip it. */
if (st->st_mtime == bsdtar->newer_mtime_sec
&& ARCHIVE_STAT_MTIME_NANOS(st)
<= bsdtar->newer_mtime_nsec)
continue; /* Too old, skip it. */
}
/*
* Note that pattern exclusions are checked before
* pathname rewrites are handled. This gives more
* control over exclusions, since rewrites always lose
* information. (For example, consider a rewrite
* s/foo[0-9]/foo/. If we check exclusions after the
* rewrite, there would be no way to exclude foo1/bar
* while allowing foo2/bar.)
*/
if (lafe_excluded(bsdtar->matching, archive_entry_pathname(entry)))
continue; /* Excluded by a pattern test. */
if (mode == 't') {
/* Perversely, gtar uses -O to mean "send to stderr"
* when used with -t. */
out = bsdtar->option_stdout ? stderr : stdout;
/*
* TODO: Provide some reasonable way to
* preview rewrites. gtar always displays
* the unedited path in -t output, which means
* you cannot easily preview rewrites.
*/
if (bsdtar->verbose < 2)
safe_fprintf(out, "%s",
archive_entry_pathname(entry));
else
list_item_verbose(bsdtar, out, entry);
fflush(out);
r = archive_read_data_skip(a);
if (r == ARCHIVE_WARN) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
}
if (r == ARCHIVE_RETRY) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
}
if (r == ARCHIVE_FATAL) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
bsdtar->return_value = 1;
break;
}
fprintf(out, "\n");
} else {
/* Note: some rewrite failures prevent extraction. */
if (edit_pathname(bsdtar, entry))
continue; /* Excluded by a rewrite failure. */
if (bsdtar->option_interactive &&
!yes("extract '%s'", archive_entry_pathname(entry)))
continue;
/*
* Format here is from SUSv2, including the
* deferred '\n'.
*/
if (bsdtar->verbose) {
safe_fprintf(stderr, "x %s",
archive_entry_pathname(entry));
fflush(stderr);
}
// TODO siginfo_printinfo(bsdtar, 0);
if (bsdtar->option_stdout)
r = archive_read_data_into_fd(a, 1);
else
r = archive_read_extract(a, entry,
bsdtar->extract_flags);
if (r != ARCHIVE_OK) {
if (!bsdtar->verbose)
safe_fprintf(stderr, "%s",
archive_entry_pathname(entry));
safe_fprintf(stderr, ": %s",
archive_error_string(a));
if (!bsdtar->verbose)
fprintf(stderr, "\n");
bsdtar->return_value = 1;
}
if (bsdtar->verbose)
fprintf(stderr, "\n");
if (r == ARCHIVE_FATAL)
break;
}
}
r = archive_read_close(a);
if (r != ARCHIVE_OK)
lafe_warnc(0, "%s", archive_error_string(a));
if (r <= ARCHIVE_WARN)
bsdtar->return_value = 1;
if (bsdtar->verbose > 2)
fprintf(stdout, "Archive Format: %s, Compression: %s\n",
archive_format_name(a), archive_compression_name(a));
archive_read_finish(a);
}
/*
* Handle 'x' and 't' modes.
*/
static void
read_archive(struct bsdtar *bsdtar, char mode, struct archive *writer)
{
struct progress_data progress_data;
FILE *out;
struct archive *a;
struct archive_entry *entry;
const char *reader_options;
int r;
while (*bsdtar->argv) {
if (archive_match_include_pattern(bsdtar->matching,
*bsdtar->argv) != ARCHIVE_OK)
lafe_errc(1, 0, "Error inclusion pattern: %s",
archive_error_string(bsdtar->matching));
bsdtar->argv++;
}
if (bsdtar->names_from_file != NULL)
if (archive_match_include_pattern_from_file(
bsdtar->matching, bsdtar->names_from_file,
bsdtar->option_null) != ARCHIVE_OK)
lafe_errc(1, 0, "Error inclusion pattern: %s",
archive_error_string(bsdtar->matching));
a = archive_read_new();
if (cset_read_support_filter_program(bsdtar->cset, a) == 0)
archive_read_support_filter_all(a);
archive_read_support_format_all(a);
reader_options = getenv(ENV_READER_OPTIONS);
if (reader_options != NULL) {
char *p;
/* Set default read options. */
p = malloc(sizeof(IGNORE_WRONG_MODULE_NAME)
+ strlen(reader_options) + 1);
if (p == NULL)
lafe_errc(1, errno, "Out of memory");
/* Prepend magic code to ignore options for
* a format or modules which are not added to
* the archive read object. */
strncpy(p, IGNORE_WRONG_MODULE_NAME,
sizeof(IGNORE_WRONG_MODULE_NAME) -1);
strcpy(p + sizeof(IGNORE_WRONG_MODULE_NAME) -1, reader_options);
r = archive_read_set_options(a, p);
free(p);
if (r == ARCHIVE_FATAL)
lafe_errc(1, 0, "%s", archive_error_string(a));
else
archive_clear_error(a);
}
if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options))
lafe_errc(1, 0, "%s", archive_error_string(a));
if (archive_read_open_filename(a, bsdtar->filename,
bsdtar->bytes_per_block))
lafe_errc(1, 0, "Error opening archive: %s",
archive_error_string(a));
do_chdir(bsdtar);
if (mode == 'x') {
/* Set an extract callback so that we can handle SIGINFO. */
progress_data.bsdtar = bsdtar;
progress_data.archive = a;
archive_read_extract_set_progress_callback(a, progress_func,
&progress_data);
}
if (mode == 'x' && bsdtar->option_chroot) {
#if HAVE_CHROOT
if (chroot(".") != 0)
lafe_errc(1, errno, "Can't chroot to \".\"");
#else
lafe_errc(1, 0,
"chroot isn't supported on this platform");
#endif
}
for (;;) {
/* Support --fast-read option */
if (bsdtar->option_fast_read &&
archive_match_path_unmatched_inclusions(bsdtar->matching) == 0)
break;
r = archive_read_next_header(a, &entry);
progress_data.entry = entry;
if (r == ARCHIVE_EOF)
break;
if (r < ARCHIVE_OK)
lafe_warnc(0, "%s", archive_error_string(a));
if (r <= ARCHIVE_WARN)
bsdtar->return_value = 1;
if (r == ARCHIVE_RETRY) {
/* Retryable error: try again */
lafe_warnc(0, "Retrying...");
continue;
}
if (r == ARCHIVE_FATAL)
break;
if (bsdtar->uid >= 0) {
archive_entry_set_uid(entry, bsdtar->uid);
archive_entry_set_uname(entry, NULL);
}
if (bsdtar->gid >= 0) {
archive_entry_set_gid(entry, bsdtar->gid);
archive_entry_set_gname(entry, NULL);
}
if (bsdtar->uname)
archive_entry_set_uname(entry, bsdtar->uname);
if (bsdtar->gname)
archive_entry_set_gname(entry, bsdtar->gname);
/*
* Note that pattern exclusions are checked before
* pathname rewrites are handled. This gives more
* control over exclusions, since rewrites always lose
* information. (For example, consider a rewrite
* s/foo[0-9]/foo/. If we check exclusions after the
* rewrite, there would be no way to exclude foo1/bar
* while allowing foo2/bar.)
*/
if (archive_match_excluded(bsdtar->matching, entry))
continue; /* Excluded by a pattern test. */
if (mode == 't') {
/* Perversely, gtar uses -O to mean "send to stderr"
* when used with -t. */
out = bsdtar->option_stdout ? stderr : stdout;
/*
* TODO: Provide some reasonable way to
* preview rewrites. gtar always displays
* the unedited path in -t output, which means
* you cannot easily preview rewrites.
*/
if (bsdtar->verbose < 2)
safe_fprintf(out, "%s",
archive_entry_pathname(entry));
else
list_item_verbose(bsdtar, out, entry);
fflush(out);
r = archive_read_data_skip(a);
if (r == ARCHIVE_WARN) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
}
if (r == ARCHIVE_RETRY) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
}
if (r == ARCHIVE_FATAL) {
fprintf(out, "\n");
lafe_warnc(0, "%s",
archive_error_string(a));
bsdtar->return_value = 1;
break;
}
fprintf(out, "\n");
} else {
/* Note: some rewrite failures prevent extraction. */
if (edit_pathname(bsdtar, entry))
continue; /* Excluded by a rewrite failure. */
if (bsdtar->option_interactive &&
!yes("extract '%s'", archive_entry_pathname(entry)))
continue;
/*
* Format here is from SUSv2, including the
* deferred '\n'.
*/
if (bsdtar->verbose) {
safe_fprintf(stderr, "x %s",
archive_entry_pathname(entry));
fflush(stderr);
}
/* TODO siginfo_printinfo(bsdtar, 0); */
if (bsdtar->option_stdout)
r = archive_read_data_into_fd(a, 1);
else
r = archive_read_extract2(a, entry, writer);
if (r != ARCHIVE_OK) {
if (!bsdtar->verbose)
safe_fprintf(stderr, "%s",
archive_entry_pathname(entry));
safe_fprintf(stderr, ": %s",
archive_error_string(a));
if (!bsdtar->verbose)
fprintf(stderr, "\n");
bsdtar->return_value = 1;
}
if (bsdtar->verbose)
fprintf(stderr, "\n");
if (r == ARCHIVE_FATAL)
break;
}
}
r = archive_read_close(a);
if (r != ARCHIVE_OK)
lafe_warnc(0, "%s", archive_error_string(a));
if (r <= ARCHIVE_WARN)
bsdtar->return_value = 1;
if (bsdtar->verbose > 2)
fprintf(stdout, "Archive Format: %s, Compression: %s\n",
archive_format_name(a), archive_filter_name(a, 0));
archive_read_free(a);
}
int
bsdtar_getopt(struct bsdtar *bsdtar)
{
enum { state_start = 0, state_old_tar, state_next_word,
state_short, state_long };
const struct bsdtar_option *popt, *match = NULL, *match2 = NULL;
const char *p, *long_prefix = "--";
size_t optlength;
int opt = '?';
int required = 0;
bsdtar->argument = NULL;
/* First time through, initialize everything. */
if (bsdtar->getopt_state == state_start) {
/* Skip program name. */
++bsdtar->argv;
--bsdtar->argc;
if (*bsdtar->argv == NULL)
return (-1);
/* Decide between "new style" and "old style" arguments. */
if (bsdtar->argv[0][0] == '-') {
bsdtar->getopt_state = state_next_word;
} else {
bsdtar->getopt_state = state_old_tar;
bsdtar->getopt_word = *bsdtar->argv++;
--bsdtar->argc;
}
}
/*
* We're parsing old-style tar arguments
*/
if (bsdtar->getopt_state == state_old_tar) {
/* Get the next option character. */
opt = *bsdtar->getopt_word++;
if (opt == '\0') {
/* New-style args can follow old-style. */
bsdtar->getopt_state = state_next_word;
} else {
/* See if it takes an argument. */
p = strchr(short_options, opt);
if (p == NULL)
return ('?');
if (p[1] == ':') {
bsdtar->argument = *bsdtar->argv;
if (bsdtar->argument == NULL) {
lafe_warnc(0,
"Option %c requires an argument",
opt);
return ('?');
}
++bsdtar->argv;
--bsdtar->argc;
}
}
}
/*
* We're ready to look at the next word in argv.
*/
if (bsdtar->getopt_state == state_next_word) {
/* No more arguments, so no more options. */
if (bsdtar->argv[0] == NULL)
return (-1);
/* Doesn't start with '-', so no more options. */
if (bsdtar->argv[0][0] != '-')
return (-1);
/* "--" marks end of options; consume it and return. */
if (strcmp(bsdtar->argv[0], "--") == 0) {
++bsdtar->argv;
--bsdtar->argc;
return (-1);
}
/* Get next word for parsing. */
bsdtar->getopt_word = *bsdtar->argv++;
--bsdtar->argc;
if (bsdtar->getopt_word[1] == '-') {
/* Set up long option parser. */
bsdtar->getopt_state = state_long;
bsdtar->getopt_word += 2; /* Skip leading '--' */
} else {
/* Set up short option parser. */
bsdtar->getopt_state = state_short;
++bsdtar->getopt_word; /* Skip leading '-' */
}
}
/*
* We're parsing a group of POSIX-style single-character options.
*/
if (bsdtar->getopt_state == state_short) {
/* Peel next option off of a group of short options. */
opt = *bsdtar->getopt_word++;
if (opt == '\0') {
/* End of this group; recurse to get next option. */
bsdtar->getopt_state = state_next_word;
return bsdtar_getopt(bsdtar);
}
/* Does this option take an argument? */
p = strchr(short_options, opt);
if (p == NULL)
return ('?');
if (p[1] == ':')
required = 1;
/* If it takes an argument, parse that. */
if (required) {
/* If arg is run-in, bsdtar->getopt_word already points to it. */
if (bsdtar->getopt_word[0] == '\0') {
/* Otherwise, pick up the next word. */
bsdtar->getopt_word = *bsdtar->argv;
if (bsdtar->getopt_word == NULL) {
lafe_warnc(0,
"Option -%c requires an argument",
opt);
return ('?');
}
++bsdtar->argv;
--bsdtar->argc;
}
if (opt == 'W') {
bsdtar->getopt_state = state_long;
long_prefix = "-W "; /* For clearer errors. */
} else {
bsdtar->getopt_state = state_next_word;
bsdtar->argument = bsdtar->getopt_word;
}
}
}
/* We're reading a long option, including -W long=arg convention. */
if (bsdtar->getopt_state == state_long) {
/* After this long option, we'll be starting a new word. */
bsdtar->getopt_state = state_next_word;
/* Option name ends at '=' if there is one. */
p = strchr(bsdtar->getopt_word, '=');
if (p != NULL) {
optlength = (size_t)(p - bsdtar->getopt_word);
bsdtar->argument = (char *)(uintptr_t)(p + 1);
} else {
optlength = strlen(bsdtar->getopt_word);
}
/* Search the table for an unambiguous match. */
for (popt = tar_longopts; popt->name != NULL; popt++) {
/* Short-circuit if first chars don't match. */
if (popt->name[0] != bsdtar->getopt_word[0])
continue;
/* If option is a prefix of name in table, record it.*/
if (strncmp(bsdtar->getopt_word, popt->name, optlength) == 0) {
match2 = match; /* Record up to two matches. */
match = popt;
/* If it's an exact match, we're done. */
if (strlen(popt->name) == optlength) {
match2 = NULL; /* Forget the others. */
break;
}
}
}
/* Fail if there wasn't a unique match. */
if (match == NULL) {
lafe_warnc(0,
"Option %s%s is not supported",
long_prefix, bsdtar->getopt_word);
return ('?');
}
if (match2 != NULL) {
lafe_warnc(0,
"Ambiguous option %s%s (matches --%s and --%s)",
long_prefix, bsdtar->getopt_word, match->name, match2->name);
return ('?');
}
/* We've found a unique match; does it need an argument? */
if (match->required) {
/* Argument required: get next word if necessary. */
if (bsdtar->argument == NULL) {
bsdtar->argument = *bsdtar->argv;
if (bsdtar->argument == NULL) {
lafe_warnc(0,
"Option %s%s requires an argument",
long_prefix, match->name);
return ('?');
}
++bsdtar->argv;
--bsdtar->argc;
}
} else {
/* Argument forbidden: fail if there is one. */
if (bsdtar->argument != NULL) {
lafe_warnc(0,
"Option %s%s does not allow an argument",
long_prefix, match->name);
return ('?');
}
}
return (match->equivalent);
}
return (opt);
}
int
main(int argc, char *argv[])
{
static char buff[16384];
struct cpio _cpio; /* Allocated on stack. */
struct cpio *cpio;
const char *errmsg;
int uid, gid;
int opt;
cpio = &_cpio;
memset(cpio, 0, sizeof(*cpio));
cpio->buff = buff;
cpio->buff_size = sizeof(buff);
/* Need lafe_progname before calling lafe_warnc. */
if (*argv == NULL)
lafe_progname = "bsdcpio";
else {
#if defined(_WIN32) && !defined(__CYGWIN__)
lafe_progname = strrchr(*argv, '\\');
#else
lafe_progname = strrchr(*argv, '/');
#endif
if (lafe_progname != NULL)
lafe_progname++;
else
lafe_progname = *argv;
}
cpio->uid_override = -1;
cpio->gid_override = -1;
cpio->argv = argv;
cpio->argc = argc;
cpio->mode = '\0';
cpio->verbose = 0;
cpio->compress = '\0';
cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
#if !defined(_WIN32) && !defined(__CYGWIN__)
if (geteuid() == 0)
cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
#endif
cpio->bytes_per_block = 512;
cpio->filename = NULL;
while ((opt = cpio_getopt(cpio)) != -1) {
switch (opt) {
case '0': /* GNU convention: --null, -0 */
cpio->option_null = 1;
break;
case 'A': /* NetBSD/OpenBSD */
cpio->option_append = 1;
break;
case 'a': /* POSIX 1997 */
cpio->option_atime_restore = 1;
break;
case 'B': /* POSIX 1997 */
cpio->bytes_per_block = 5120;
break;
case 'C': /* NetBSD/OpenBSD */
cpio->bytes_per_block = atoi(cpio->optarg);
if (cpio->bytes_per_block <= 0)
lafe_errc(1, 0, "Invalid blocksize %s", cpio->optarg);
break;
case 'c': /* POSIX 1997 */
cpio->format = "odc";
break;
case 'd': /* POSIX 1997 */
cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
break;
case 'E': /* NetBSD/OpenBSD */
lafe_include_from_file(&cpio->matching,
cpio->optarg, cpio->option_null);
break;
case 'F': /* NetBSD/OpenBSD/GNU cpio */
cpio->filename = cpio->optarg;
break;
case 'f': /* POSIX 1997 */
lafe_exclude(&cpio->matching, cpio->optarg);
break;
case 'H': /* GNU cpio (also --format) */
cpio->format = cpio->optarg;
break;
case 'h':
long_help();
break;
case 'I': /* NetBSD/OpenBSD */
cpio->filename = cpio->optarg;
break;
case 'i': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -i and -%c", cpio->mode);
cpio->mode = opt;
break;
case 'J': /* GNU tar, others */
cpio->compress = opt;
break;
case 'j': /* GNU tar, others */
cpio->compress = opt;
break;
case OPTION_INSECURE:
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
break;
case 'L': /* GNU cpio */
cpio->option_follow_links = 1;
break;
case 'l': /* POSIX 1997 */
cpio->option_link = 1;
break;
case OPTION_LZMA: /* GNU tar, others */
cpio->compress = opt;
break;
case 'm': /* POSIX 1997 */
cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
break;
case 'n': /* GNU cpio */
cpio->option_numeric_uid_gid = 1;
break;
case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case 'O': /* GNU cpio */
cpio->filename = cpio->optarg;
break;
case 'o': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -o and -%c", cpio->mode);
cpio->mode = opt;
break;
case 'p': /* POSIX 1997 */
if (cpio->mode != '\0')
lafe_errc(1, 0,
"Cannot use both -p and -%c", cpio->mode);
cpio->mode = opt;
cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
break;
case OPTION_PRESERVE_OWNER:
cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_QUIET: /* GNU cpio */
cpio->quiet = 1;
break;
case 'R': /* GNU cpio, also --owner */
errmsg = owner_parse(cpio->optarg, &uid, &gid);
if (errmsg) {
lafe_warnc(-1, "%s", errmsg);
usage();
}
if (uid != -1)
cpio->uid_override = uid;
if (gid != -1)
cpio->gid_override = gid;
break;
case 'r': /* POSIX 1997 */
cpio->option_rename = 1;
break;
case 't': /* POSIX 1997 */
cpio->option_list = 1;
break;
case 'u': /* POSIX 1997 */
cpio->extract_flags
&= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
break;
case 'v': /* POSIX 1997 */
cpio->verbose++;
break;
case OPTION_VERSION: /* GNU convention */
version();
break;
#if 0
/*
* cpio_getopt() handles -W specially, so it's not
* available here.
*/
case 'W': /* Obscure, but useful GNU convention. */
break;
#endif
case 'y': /* tar convention */
cpio->compress = opt;
break;
case 'Z': /* tar convention */
cpio->compress = opt;
break;
case 'z': /* tar convention */
cpio->compress = opt;
break;
default:
usage();
}
}
/*
* Sanity-check args, error out on nonsensical combinations.
*/
/* -t implies -i if no mode was specified. */
if (cpio->option_list && cpio->mode == '\0')
cpio->mode = 'i';
/* -t requires -i */
if (cpio->option_list && cpio->mode != 'i')
lafe_errc(1, 0, "Option -t requires -i");
/* -n requires -it */
if (cpio->option_numeric_uid_gid && !cpio->option_list)
lafe_errc(1, 0, "Option -n requires -it");
/* Can only specify format when writing */
if (cpio->format != NULL && cpio->mode != 'o')
lafe_errc(1, 0, "Option --format requires -o");
/* -l requires -p */
if (cpio->option_link && cpio->mode != 'p')
lafe_errc(1, 0, "Option -l requires -p");
/* TODO: Flag other nonsensical combinations. */
switch (cpio->mode) {
case 'o':
/* TODO: Implement old binary format in libarchive,
use that here. */
if (cpio->format == NULL)
cpio->format = "odc"; /* Default format */
mode_out(cpio);
break;
case 'i':
while (*cpio->argv != NULL) {
lafe_include(&cpio->matching, *cpio->argv);
--cpio->argc;
++cpio->argv;
}
if (cpio->option_list)
mode_list(cpio);
else
mode_in(cpio);
break;
case 'p':
if (*cpio->argv == NULL || **cpio->argv == '\0')
lafe_errc(1, 0,
"-p mode requires a target directory");
mode_pass(cpio, *cpio->argv);
break;
default:
lafe_errc(1, 0,
"Must specify at least one of -i, -o, or -p");
}
free_cache(cpio->gname_cache);
free_cache(cpio->uname_cache);
return (cpio->return_value);
}
