/*
* 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");
}
static int
archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
{
if (bsdtar->next_line_is_dir) {
set_chdir(bsdtar, line);
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, bsdtar->archive, line);
}
return (0);
}
static int
archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
{
if (bsdtar->next_line_is_dir) {
if (*line != '\0')
set_chdir(bsdtar, line);
else {
bsdtar_warnc(bsdtar, 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, bsdtar->archive, line);
}
return (0);
}
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);
}
/*
* 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)
{
struct bsdtar *bsdtar;
int opt;
char possible_help_request;
char buff[16];
char cachedir[PATH_MAX + 1];
struct passwd *pws;
char *conffile;
const char *missingkey;
time_t now;
size_t i;
WARNP_INIT;
/* Use a pointer for consistency. */
bsdtar = bsdtar_init();
#if defined(_WIN32) && !defined(__CYGWIN__)
/* Make sure open() function will be used with a binary mode. */
/* on cygwin, we need something similar, but instead link against */
/* a special startup object, binmode.o */
_set_fmode(_O_BINARY);
#endif
/* Need bsdtar->progname before calling bsdtar_warnc. */
if (*argv == NULL)
bsdtar->progname = "tarsnap";
else {
#if defined(_WIN32) && !defined(__CYGWIN__)
bsdtar->progname = strrchr(*argv, '\\');
#else
bsdtar->progname = strrchr(*argv, '/');
#endif
if (bsdtar->progname != NULL)
bsdtar->progname++;
else
bsdtar->progname = *argv;
}
/* We don't have a machine # yet. */
bsdtar->machinenum = (uint64_t)(-1);
/* Allocate space for archive names; at most argc of them. */
if ((bsdtar->tapenames = malloc(argc * sizeof(const char *))) == NULL)
bsdtar_errc(bsdtar, 1, ENOMEM, "Cannot allocate memory");
bsdtar->ntapes = 0;
/* Allocate space for config file names; at most argc of them. */
if ((bsdtar->configfiles = malloc(argc * sizeof(const char *))) == NULL)
bsdtar_errc(bsdtar, 1, ENOMEM, "Cannot allocate memory");
bsdtar->nconfigfiles = 0;
time(&now);
bsdtar->creationtime = now;
if (setlocale(LC_ALL, "") == NULL)
bsdtar_warnc(bsdtar, 0, "Failed to set default locale");
#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
#endif
possible_help_request = 0;
/* Initialize key cache. We don't have any keys yet. */
if (crypto_keys_init())
exit(1);
/*
* Make stdout line-buffered (if possible) so that operations such as
* "tarsnap --list-archives | more" will run more smoothly. The only
* downside to this is a slight performance cost; but we don't write
* enough data to stdout for that to matter.
*/
setvbuf(stdout, NULL, _IONBF, 0);
/*
* Unless specified otherwise, we consider ourselves to be
* constructing a snapshot of the disk as it is right now.
*/
/*
* POSIX doesn't provide any mechanism for distinguishing between
* an error and the time (time_t)(-1). Since we only use this to
* avoid race conditions in the chunkification cache (i.e., so
* that we can determine if a file has been modified since it was
* last backed up), and hopefully nobody will have any files with
* negative last-modified dates, an error return of (-1) can be
* handled the same was as a legitimate return of (-1): Nothing
* gets cached.
*/
bsdtar->snaptime = time(NULL);
/* Store original argument vector. */
bsdtar->argc_orig = argc;
bsdtar->argv_orig = argv;
/* Look up the current user and his home directory. */
if ((pws = getpwuid(geteuid())) != NULL)
if ((bsdtar->homedir = strdup(pws->pw_dir)) == NULL)
bsdtar_errc(bsdtar, 1, ENOMEM, "Cannot allocate memory");
/* Look up uid of current user for future reference */
bsdtar->user_uid = geteuid();
/* Default: preserve mod time on extract */
bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
/* Default: Perform basic security checks. */
bsdtar->extract_flags |= SECURITY;
/* Defaults for root user: */
if (bsdtar_is_privileged(bsdtar)) {
/* --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->argv = argv;
bsdtar->argc = argc;
/* We gather some options in a 'delayed options queue'. */
bsdtar->delopt = NULL;
bsdtar->delopt_tail = &bsdtar->delopt;
/*
* 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 OPTION_AGGRESSIVE_NETWORKING: /* tarsnap */
optq_push(bsdtar, "aggressive-networking", NULL);
break;
case 'B': /* GNU tar */
/* libarchive doesn't need this; just ignore it. */
break;
case 'C': /* GNU tar */
if (strlen(bsdtar->optarg) == 0)
bsdtar_errc(bsdtar, 1, 0,
"Meaningless option: -C ''");
set_chdir(bsdtar, bsdtar->optarg);
break;
case 'c': /* SUSv2 */
set_mode(bsdtar, opt, "-c");
break;
case OPTION_CACHEDIR: /* multitar */
optq_push(bsdtar, "cachedir", bsdtar->optarg);
break;
case OPTION_CHECK_LINKS: /* GNU tar */
bsdtar->option_warn_links = 1;
break;
case OPTION_CHECKPOINT_BYTES: /* tarsnap */
optq_push(bsdtar, "checkpoint-bytes", bsdtar->optarg);
break;
case OPTION_CHROOT: /* NetBSD */
bsdtar->option_chroot = 1;
break;
case OPTION_CONFIGFILE:
bsdtar->configfiles[bsdtar->nconfigfiles++] =
bsdtar->optarg;
break;
case OPTION_CREATIONTIME: /* tarsnap */
errno = 0;
bsdtar->creationtime = strtol(bsdtar->optarg,
NULL, 0);
if ((errno) || (bsdtar->creationtime == 0))
bsdtar_errc(bsdtar, 1, 0,
"Invalid --creationtime argument: %s",
bsdtar->optarg);
break;
case OPTION_CSV_FILE: /* tarsnap */
if (bsdtar->option_csv_filename != NULL)
bsdtar_errc(bsdtar, 1, errno,
"Two --csv-file options given.\n");
if ((bsdtar->option_csv_filename = strdup(
bsdtar->optarg)) == NULL)
bsdtar_errc(bsdtar, 1, errno, "Out of memory");
break;
case 'd': /* multitar */
set_mode(bsdtar, opt, "-d");
break;
case OPTION_DISK_PAUSE: /* tarsnap */
optq_push(bsdtar, "disk-pause", bsdtar->optarg);
break;
case OPTION_DRYRUN: /* tarsnap */
bsdtar->option_dryrun = 1;
break;
case OPTION_EXCLUDE: /* GNU tar */
optq_push(bsdtar, "exclude", bsdtar->optarg);
break;
case 'f': /* multitar */
bsdtar->tapenames[bsdtar->ntapes++] = bsdtar->optarg;
break;
case OPTION_FSCK: /* multitar */
set_mode(bsdtar, opt, "--fsck");
break;
case OPTION_FSCK_PRUNE: /* multitar */
set_mode(bsdtar, opt, "--fsck-prune");
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(bsdtar);
exit(0);
break;
case OPTION_HUMANIZE_NUMBERS: /* tarsnap */
optq_push(bsdtar, "humanize-numbers", NULL);
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:
optq_push(bsdtar, "include", bsdtar->optarg);
break;
case OPTION_INSANE_FILESYSTEMS:
optq_push(bsdtar, "insane-filesystems", NULL);
break;
case 'k': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
break;
case OPTION_KEEP_GOING: /* tarsnap */
bsdtar->option_keep_going = 1;
break;
case OPTION_KEEP_NEWER_FILES: /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
break;
case OPTION_KEYFILE: /* tarsnap */
optq_push(bsdtar, "keyfile", bsdtar->optarg);
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_LIST_ARCHIVES: /* multitar */
set_mode(bsdtar, opt, "--list-archives");
break;
case OPTION_LOWMEM: /* tarsnap */
optq_push(bsdtar, "lowmem", NULL);
break;
case 'm': /* SUSv2 */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
break;
case OPTION_MAXBW: /* tarsnap */
optq_push(bsdtar, "maxbw", bsdtar->optarg);
break;
case OPTION_MAXBW_RATE: /* tarsnap */
optq_push(bsdtar, "maxbw-rate", bsdtar->optarg);
break;
case OPTION_MAXBW_RATE_DOWN: /* tarsnap */
optq_push(bsdtar, "maxbw-rate-down", bsdtar->optarg);
break;
case OPTION_MAXBW_RATE_UP: /* tarsnap */
optq_push(bsdtar, "maxbw-rate-up", bsdtar->optarg);
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)
bsdtar_errc(bsdtar, 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)
bsdtar_errc(bsdtar, 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 */
optq_push(bsdtar, "nodump", NULL);
break;
case OPTION_NOISY_WARNINGS: /* tarsnap */
tarsnap_opt_noisy_warnings = 1;
break;
case OPTION_NORMALMEM:
optq_push(bsdtar, "normalmem", NULL);
break;
case OPTION_NO_AGGRESSIVE_NETWORKING:
optq_push(bsdtar, "no-aggressive-networking", NULL);
break;
case OPTION_NO_CONFIG_EXCLUDE:
optq_push(bsdtar, "no-config-exclude", NULL);
break;
case OPTION_NO_CONFIG_INCLUDE:
optq_push(bsdtar, "no-config-include", NULL);
break;
case OPTION_NO_DEFAULT_CONFIG:
bsdtar->option_no_default_config = 1;
break;
case OPTION_NO_DISK_PAUSE:
optq_push(bsdtar, "no-disk-pause", NULL);
break;
case OPTION_NO_HUMANIZE_NUMBERS:
optq_push(bsdtar, "no-humanize-numbers", NULL);
break;
case OPTION_NO_INSANE_FILESYSTEMS:
optq_push(bsdtar, "no-insane-filesystems", NULL);
break;
case OPTION_NO_MAXBW:
optq_push(bsdtar, "no-maxbw", NULL);
break;
case OPTION_NO_MAXBW_RATE_DOWN:
optq_push(bsdtar, "no-maxbw-rate-down", NULL);
break;
case OPTION_NO_MAXBW_RATE_UP:
optq_push(bsdtar, "no-maxbw-rate-up", NULL);
break;
case OPTION_NO_NODUMP:
optq_push(bsdtar, "no-nodump", NULL);
break;
case OPTION_NO_PRINT_STATS:
optq_push(bsdtar, "no-print-stats", NULL);
break;
case OPTION_NO_QUIET:
optq_push(bsdtar, "no-quiet", NULL);
break;
case OPTION_NO_RETRY_FOREVER:
optq_push(bsdtar, "no-retry-forever", NULL);
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_NO_SNAPTIME:
optq_push(bsdtar, "no-snaptime", NULL);
break;
case OPTION_NO_STORE_ATIME:
optq_push(bsdtar, "no-store-atime", NULL);
break;
case OPTION_NO_TOTALS:
optq_push(bsdtar, "no-totals", NULL);
break;
case OPTION_NUKE: /* tarsnap */
set_mode(bsdtar, opt, "--nuke");
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':
bsdtar->option_no_owner = 1;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
bsdtar->option_dont_traverse_mounts = 1;
break;
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_PRINT_STATS: /* multitar */
bsdtar->option_print_stats = 1;
break;
case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
bsdtar->option_fast_read = 1;
break;
case OPTION_QUIET:
optq_push(bsdtar, "quiet", NULL);
break;
case 'r': /* multitar */
set_mode(bsdtar, opt, "-r");
break;
case OPTION_RECOVER:
set_mode(bsdtar, opt, "--recover");
break;
case OPTION_RETRY_FOREVER:
optq_push(bsdtar, "retry-forever", NULL);
break;
case OPTION_SNAPTIME: /* multitar */
optq_push(bsdtar, "snaptime", bsdtar->optarg);
break;
case OPTION_STORE_ATIME: /* multitar */
optq_push(bsdtar, "store-atime", NULL);
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
bsdtar_warnc(bsdtar, 0,
"-s is not supported by this version of tarsnap");
usage(bsdtar);
#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->optarg,
NULL, 0);
if (errno)
bsdtar_errc(bsdtar, 1, 0,
"Invalid --strip-components argument: %s",
bsdtar->optarg);
break;
case 'T': /* GNU tar */
bsdtar->names_from_file = bsdtar->optarg;
break;
case 't': /* SUSv2 */
set_mode(bsdtar, opt, "-t");
bsdtar->verbose++;
break;
case OPTION_TOTALS: /* GNU tar */
optq_push(bsdtar, "totals", NULL);
break;
case 'U': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
bsdtar->option_unlink_first = 1;
break;
case 'v': /* SUSv2 */
bsdtar->verbose++;
break;
case OPTION_VERSION: /* GNU convention */
version();
break;
case OPTION_VERYLOWMEM: /* tarsnap */
optq_push(bsdtar, "verylowmem", NULL);
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 (exclude_from_file(bsdtar, bsdtar->optarg))
bsdtar_errc(bsdtar, 1, 0,
"failed to process exclusions from file %s",
bsdtar->optarg);
break;
case 'x': /* SUSv2 */
set_mode(bsdtar, opt, "-x");
break;
default:
usage(bsdtar);
}
}
/*
* Sanity-check options.
*/
/*
* If --print-stats was specified but no mode was set, then
* --print-stats *is* the mode.
*/
if ((bsdtar->mode == '\0') && (bsdtar->option_print_stats == 1))
set_mode(bsdtar, OPTION_PRINT_STATS, "--print-stats");
/* If no "real" mode was specified, treat -h as --help. */
if ((bsdtar->mode == '\0') && possible_help_request) {
long_help(bsdtar);
exit(0);
}
/*
* If we're doing a dry run and the user hasn't specified an archive
* name via -f, use a fake name. This will result in the statistics
* printed by --print-stats being a few bytes off, since the archive
* name is included in the metadata block... but we're going to be a
* few bytes off anyway since the command line, including "--dry-run"
* is included in the metadata.
*/
if (bsdtar->option_dryrun && (bsdtar->ntapes == 0))
bsdtar->tapenames[bsdtar->ntapes++] = "(dry-run)";
/* At this point we must have a mode set. */
if (bsdtar->mode == '\0')
bsdtar_errc(bsdtar, 1, 0,
"Must specify one of -c, -d, -r, -t, -x,"
" --list-archives, --print-stats,"
" --fsck, --fsck-prune, or --nuke");
/* Process "delayed" command-line options which we queued earlier. */
while (bsdtar->delopt != NULL) {
dooption(bsdtar, bsdtar->delopt->opt_name,
bsdtar->delopt->opt_arg, 0);
optq_pop(bsdtar);
}
/* Process config files passed on the command line. */
for (i = 0; i < bsdtar->nconfigfiles; i++)
configfile(bsdtar, bsdtar->configfiles[i]);
/* If we do not have --no-default-config, process default configs. */
if (bsdtar->option_no_default_config == 0) {
/* Process options from ~/.tarsnaprc. */
if (bsdtar->homedir != NULL) {
if (asprintf(&conffile, "%s/.tarsnaprc",
bsdtar->homedir) == -1)
bsdtar_errc(bsdtar, 1, errno, "No memory");
configfile(bsdtar, conffile);
/* Free string allocated by asprintf. */
free(conffile);
}
/* Process options from system-wide tarsnap.conf. */
configfile(bsdtar, ETC_TARSNAP_CONF);
}
/* Continue with more sanity-checking. */
if ((bsdtar->ntapes == 0) &&
(bsdtar->mode != OPTION_PRINT_STATS &&
bsdtar->mode != OPTION_LIST_ARCHIVES &&
bsdtar->mode != OPTION_RECOVER &&
bsdtar->mode != OPTION_FSCK &&
bsdtar->mode != OPTION_FSCK_PRUNE &&
bsdtar->mode != OPTION_NUKE))
bsdtar_errc(bsdtar, 1, 0,
"Archive name must be specified");
if ((bsdtar->ntapes > 1) &&
(bsdtar->mode != OPTION_PRINT_STATS &&
bsdtar->mode != 'd'))
bsdtar_errc(bsdtar, 1, 0,
"Option -f may only be specified once in mode %s",
bsdtar->modestr);
if ((bsdtar->mode == 'c') &&
(strlen(bsdtar->tapenames[0]) > 1023))
bsdtar_errc(bsdtar, 1, 0,
"Cannot create an archive with a name > 1023 characters");
if ((bsdtar->mode == 'c') &&
(strlen(bsdtar->tapenames[0]) == 0))
bsdtar_errc(bsdtar, 1, 0,
"Cannot create an archive with an empty name");
if ((bsdtar->cachedir == NULL) &&
(((bsdtar->mode == 'c') && (!bsdtar->option_dryrun)) ||
bsdtar->mode == 'd' ||
bsdtar->mode == OPTION_RECOVER ||
bsdtar->mode == OPTION_FSCK ||
bsdtar->mode == OPTION_FSCK_PRUNE ||
bsdtar->mode == OPTION_PRINT_STATS))
bsdtar_errc(bsdtar, 1, 0,
"Cache directory must be specified for %s",
bsdtar->modestr);
if (tarsnap_opt_aggressive_networking != 0) {
if ((bsdtar->bwlimit_rate_up != 0) ||
(bsdtar->bwlimit_rate_down != 0)) {
bsdtar_warnc(bsdtar, 0,
"--aggressive-networking is incompatible with"
" --maxbw-rate options;\n"
" disabling --aggressive-networking");
tarsnap_opt_aggressive_networking = 0;
}
}
/*
* The -f option doesn't make sense for --list-archives, --fsck,
* --fsck-prune, or --nuke.
*/
if ((bsdtar->ntapes > 0) &&
(bsdtar->mode != OPTION_PRINT_STATS))
only_mode(bsdtar, "-f", "cxtdr");
/*
* These options don't make sense for the "delete" and "convert to
* tar" modes.
*/
if (bsdtar->pending_chdir)
only_mode(bsdtar, "-C", "cxt");
if (bsdtar->names_from_file)
only_mode(bsdtar, "-T", "cxt");
if (bsdtar->newer_ctime_sec || bsdtar->newer_ctime_nsec)
only_mode(bsdtar, "--newer", "cxt");
if (bsdtar->newer_mtime_sec || bsdtar->newer_mtime_nsec)
only_mode(bsdtar, "--newer-mtime", "cxt");
if (bsdtar->option_absolute_paths)
only_mode(bsdtar, "-P", "cxt");
if (bsdtar->option_null)
only_mode(bsdtar, "--null", "cxt");
/* Check options only permitted in certain modes. */
if (bsdtar->option_dont_traverse_mounts)
only_mode(bsdtar, "--one-file-system", "c");
if (bsdtar->option_fast_read)
only_mode(bsdtar, "--fast-read", "xt");
if (bsdtar->option_no_subdirs)
only_mode(bsdtar, "-n", "c");
if (bsdtar->option_no_owner)
only_mode(bsdtar, "-o", "x");
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", "c");
if (bsdtar->option_dryrun)
only_mode(bsdtar, "--dry-run", "c");
/* Check other parameters only permitted in certain modes. */
if (bsdtar->symlink_mode != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->symlink_mode;
only_mode(bsdtar, buff, "c");
}
if (bsdtar->strip_components != 0)
only_mode(bsdtar, "--strip-components", "xt");
/*
* If the keyfile in the config file is invalid but we're doing a
* dryrun, continue anyway (and don't use a cachedir).
*/
if (bsdtar->config_file_keyfile_failed && bsdtar->option_dryrun &&
bsdtar->cachedir != NULL) {
bsdtar_warnc(bsdtar, 0,
"Ignoring cachedir due to missing or invalid "
"keyfile in config file.");
free(bsdtar->cachedir);
bsdtar->cachedir = NULL;
}
/*
* Canonicalize the path to the cache directories. This is
* necessary since the tar code can change directories.
*/
if (bsdtar->cachedir != NULL) {
build_dir(bsdtar, bsdtar->cachedir, "--cachedir");
if (realpath(bsdtar->cachedir, cachedir) == NULL)
bsdtar_errc(bsdtar, 1, errno, "realpath(%s)",
bsdtar->cachedir);
free(bsdtar->cachedir);
if ((bsdtar->cachedir = strdup(cachedir)) == NULL)
bsdtar_errc(bsdtar, 1, errno, "Out of memory");
}
/* If we're running --fsck, figure out which key to use. */
if (bsdtar->mode == OPTION_FSCK) {
if (crypto_keys_missing(CRYPTO_KEYMASK_AUTH_PUT) == NULL)
bsdtar->mode = OPTION_FSCK_WRITE;
else if (crypto_keys_missing(CRYPTO_KEYMASK_AUTH_DELETE) == NULL)
bsdtar->mode = OPTION_FSCK_DELETE;
else
bsdtar_errc(bsdtar, 1, 0,
"The write or delete authorization key is"
" required for --fsck but is not available");
}
/* If we're running --recover, figure out which key to use. */
if (bsdtar->mode == OPTION_RECOVER) {
if (crypto_keys_missing(CRYPTO_KEYMASK_AUTH_PUT) == NULL)
bsdtar->mode = OPTION_RECOVER_WRITE;
else if (crypto_keys_missing(CRYPTO_KEYMASK_AUTH_DELETE) == NULL)
bsdtar->mode = OPTION_RECOVER_DELETE;
else
bsdtar_errc(bsdtar, 1, 0,
"The write or delete authorization key is"
" required for --recover but is not available");
}
/* Make sure we have whatever keys we're going to need. */
if (bsdtar->have_keys == 0) {
if (!bsdtar->option_dryrun) {
bsdtar_errc(bsdtar, 1, 0,
"Keys must be provided via --keyfile option");
} else {
if (bsdtar->cachedir != NULL) {
bsdtar_errc(bsdtar, 1, 0,
"Option mismatch for --dry-run: cachedir"
" specified but no keyfile");
}
if (crypto_keys_generate(CRYPTO_KEYMASK_USER))
bsdtar_errc(bsdtar, 1, 0,
"Error generating keys");
if (bsdtar->option_print_stats)
bsdtar_warnc(bsdtar, 0,
"Performing dry-run archival without keys\n"
" (sizes may be slightly "
"inaccurate)");
}
}
missingkey = NULL;
switch (bsdtar->mode) {
case 'c':
if (argv_has_archive_directive(bsdtar))
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_WRITE | CRYPTO_KEYMASK_READ);
else
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_WRITE);
break;
case OPTION_RECOVER_WRITE:
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_WRITE);
break;
case 'd':
case OPTION_FSCK_PRUNE:
case OPTION_FSCK_DELETE:
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_READ |
CRYPTO_KEYMASK_AUTH_DELETE);
break;
case OPTION_FSCK_WRITE:
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_READ |
CRYPTO_KEYMASK_AUTH_PUT);
break;
case OPTION_NUKE:
case OPTION_RECOVER_DELETE:
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_AUTH_DELETE);
break;
case OPTION_PRINT_STATS:
/* We don't need keys for printing global stats. */
if (bsdtar->ntapes == 0)
break;
/* FALLTHROUGH */
case OPTION_LIST_ARCHIVES:
case 'r':
case 't':
case 'x':
missingkey = crypto_keys_missing(CRYPTO_KEYMASK_READ);
break;
}
if (missingkey != NULL)
bsdtar_errc(bsdtar, 1, 0,
"The %s key is required for %s but is not available",
missingkey, bsdtar->modestr);
/* Tell the network layer how much bandwidth to use. */
if (bsdtar->bwlimit_rate_up == 0)
bsdtar->bwlimit_rate_up = 1000000000.;
if (bsdtar->bwlimit_rate_down == 0)
bsdtar->bwlimit_rate_down = 1000000000.;
network_bwlimit(bsdtar->bwlimit_rate_down, bsdtar->bwlimit_rate_up);
/* Perform the requested operation. */
switch(bsdtar->mode) {
case 'c':
tarsnap_mode_c(bsdtar);
break;
case 'd':
tarsnap_mode_d(bsdtar);
break;
case OPTION_FSCK_DELETE:
tarsnap_mode_fsck(bsdtar, 0, 1);
break;
case OPTION_FSCK_PRUNE:
tarsnap_mode_fsck(bsdtar, 1, 1);
break;
case OPTION_FSCK_WRITE:
tarsnap_mode_fsck(bsdtar, 0, 0);
break;
case OPTION_PRINT_STATS:
tarsnap_mode_print_stats(bsdtar);
break;
case OPTION_RECOVER_DELETE:
tarsnap_mode_recover(bsdtar, 1);
break;
case OPTION_RECOVER_WRITE:
tarsnap_mode_recover(bsdtar, 0);
break;
case OPTION_LIST_ARCHIVES:
tarsnap_mode_list_archives(bsdtar);
break;
case OPTION_NUKE:
tarsnap_mode_nuke(bsdtar);
break;
case 'r':
tarsnap_mode_r(bsdtar);
break;
case 't':
tarsnap_mode_t(bsdtar);
break;
case 'x':
tarsnap_mode_x(bsdtar);
break;
}
#ifdef DEBUG_SELECTSTATS
double N, mu, va, max;
network_getselectstats(&N, &mu, &va, &max);
fprintf(stderr, "Time-between-select-calls statistics:\n");
fprintf(stderr, "N = %6g mu = %12g ms "
"va = %12g ms^2 max = %12g ms\n",
N, mu * 1000, va * 1000000, max * 1000);
#endif
#ifdef PROFILE
/*
* If we're compiling with profiling turned on, chdir to a directory
* into which we're likely to be able to write to before exiting.
*/
if (bsdtar->cachedir != NULL)
chdir(cachedir);
#endif
if (bsdtar->return_value != 0)
bsdtar_warnc(bsdtar, 0,
"Error exit delayed from previous errors.");
return (bsdtar->return_value);
}
/*
* 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);
}
/*
* Write user-specified files/dirs to opened archive.
*/
static void
write_archive(struct archive *a, struct bsdtar *bsdtar)
{
struct sigaction sa;
const char *arg;
struct archive_entry *entry, *sparse_entry;
/* We want to catch SIGINFO and SIGUSR1. */
siginfo_init(bsdtar);
/* We also want to catch SIGQUIT and ^Q. */
if (sigquit_init())
exit(1);
/* And SIGUSR2, too. */
sa.sa_handler = sigusr2_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGUSR2, &sa, NULL))
bsdtar_errc(bsdtar, 1, 0, "cannot install signal handler");
/* Allocate a buffer for file data. */
if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == NULL)
bsdtar_errc(bsdtar, 1, 0, "cannot allocate memory");
if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver");
archive_entry_linkresolver_set_strategy(bsdtar->resolver,
archive_format(a));
if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
bsdtar_errc(bsdtar, 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) {
if (truncate_archive(bsdtar))
break;
if (checkpoint_archive(bsdtar, 0))
exit(1);
arg = *bsdtar->argv;
if (arg[0] == '-' && arg[1] == 'C') {
arg += 2;
if (*arg == '\0') {
bsdtar->argv++;
arg = *bsdtar->argv;
if (arg == NULL) {
bsdtar_warnc(bsdtar, 0,
"Missing argument for -C");
bsdtar->return_value = 1;
goto cleanup;
}
if (*arg == '\0') {
bsdtar_warnc(bsdtar, 0,
"Meaningless argument for -C: ''");
bsdtar->return_value = 1;
goto cleanup;
}
}
set_chdir(bsdtar, arg);
} else {
if (arg[0] != '/' &&
(arg[0] != '@' || arg[1] != '/') &&
(arg[0] != '@' || arg[1] != '@'))
do_chdir(bsdtar); /* Handle a deferred -C */
if (arg[0] == '@' && arg[1] == '@') {
if (append_archive_tarsnap(bsdtar, a,
arg + 2) != 0)
break;
} else if (arg[0] == '@') {
if (append_archive_filename(bsdtar, a,
arg + 1) != 0)
break;
} else
#if defined(_WIN32) && !defined(__CYGWIN__)
write_hierarchy_win(bsdtar, a, arg,
write_hierarchy);
#else
write_hierarchy(bsdtar, a, arg);
#endif
}
bsdtar->argv++;
}
/*
* This code belongs to bsdtar and is used when writing archives in
* "new cpio" format. It has no effect in tarsnap, since tarsnap
* doesn't write archives in this format; but I'm leaving it in to
* make the diffs smaller.
*/
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
while (entry != NULL) {
write_entry_backend(bsdtar, a, entry, NULL, NULL);
archive_entry_free(entry);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
}
if (archive_write_close(a)) {
bsdtar_warnc(bsdtar, 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_finish(bsdtar->diskreader);
bsdtar->diskreader = NULL;
if (bsdtar->option_totals && (bsdtar->return_value == 0)) {
fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
}
archive_write_finish(a);
/* Restore old SIGINFO + SIGUSR1 handlers. */
siginfo_done(bsdtar);
}
/*
* 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;
/* We want to catch SIGINFO and SIGUSR1. */
siginfo_init(bsdtar);
/* Allocate a buffer for file data. */
if ((bsdtar->buff = malloc(FILEDATABUFLEN)) == NULL)
bsdtar_errc(bsdtar, 1, 0, "cannot allocate memory");
if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
bsdtar_errc(bsdtar, 1, 0, "cannot create link resolver");
archive_entry_linkresolver_set_strategy(bsdtar->resolver,
archive_format(a));
if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
bsdtar_errc(bsdtar, 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) {
bsdtar_warnc(bsdtar, 1, 0,
"Missing 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
#if defined(_WIN32) && !defined(__CYGWIN__)
write_hierarchy_win(bsdtar, a, arg,
write_hierarchy);
#else
write_hierarchy(bsdtar, a, arg);
#endif
}
bsdtar->argv++;
}
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
while (entry != NULL) {
write_entry_backend(bsdtar, a, entry);
archive_entry_free(entry);
entry = NULL;
archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
}
if (archive_write_close(a)) {
bsdtar_warnc(bsdtar, 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_finish(bsdtar->diskreader);
bsdtar->diskreader = NULL;
if (bsdtar->option_totals) {
fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
}
archive_write_finish(a);
/* Restore old SIGINFO + SIGUSR1 handlers. */
siginfo_done(bsdtar);
}