static void
bsdtar_atexit(void)
{
struct bsdtar *bsdtar;
bsdtar = &bsdtar_storage;
/* Free arrays allocated by malloc. */
free(bsdtar->tapenames);
free(bsdtar->configfiles);
/* Free strings allocated by strdup. */
free(bsdtar->cachedir);
free(bsdtar->homedir);
free(bsdtar->option_csv_filename);
/* Free matching and (if applicable) substitution patterns. */
cleanup_exclusions(bsdtar);
#if HAVE_REGEX_H
cleanup_substitution(bsdtar);
#endif
/* Clean up network layer. */
network_fini();
}
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);
}
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);
}
