X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Ftar.c;h=c8eeaa4fb84c7393bd4a4f736ab537475fcc5385;hb=78b078b455b834695ebd3104ec3dbe8a4ac9f3a3;hp=7d87f80159909f0a34b7c3ff493a0496dee6d5cb;hpb=5a5f4d06e7588bf06411d34aff79b6f0f482a9a7;p=chaz%2Ftar diff --git a/src/tar.c b/src/tar.c index 7d87f80..c8eeaa4 100644 --- a/src/tar.c +++ b/src/tar.c @@ -1,7 +1,7 @@ /* A tar (tape archiver) program. - Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001 - Free Software Foundation, Inc. + Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, + 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. Written by John Gilmore, starting 1985-08-25. @@ -17,12 +17,12 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ -#include "system.h" +#include #include -#include +#include #include #if ! defined SIGCHLD && defined SIGCLD @@ -36,16 +36,22 @@ #define GLOBAL #include "common.h" -#include +#include +#include #include +#include #include #include +#include #include - -time_t get_date (); +#include /* Local declarations. */ +#ifndef DEFAULT_ARCHIVE_FORMAT +# define DEFAULT_ARCHIVE_FORMAT GNU_FORMAT +#endif + #ifndef DEFAULT_ARCHIVE # define DEFAULT_ARCHIVE "tar.out" #endif @@ -54,7 +60,6 @@ time_t get_date (); # define DEFAULT_BLOCKING 20 #endif -static void usage PARAMS ((int)) __attribute__ ((noreturn)); /* Miscellaneous. */ @@ -72,12 +77,15 @@ request_stdin (const char *option) stdin_used_by = option; } -/* Returns true if and only if the user typed 'y' or 'Y'. */ +extern int rpmatch (char const *response); + +/* Returns true if and only if the user typed an affirmative response. */ int confirm (const char *message_action, const char *message_name) { static FILE *confirm_file; static int confirm_file_EOF; + bool status = false; if (!confirm_file) { @@ -97,377 +105,622 @@ confirm (const char *message_action, const char *message_name) fprintf (stdlis, "%s %s?", message_action, quote (message_name)); fflush (stdlis); - { - int reply = confirm_file_EOF ? EOF : getc (confirm_file); - int character; + if (!confirm_file_EOF) + { + char *response = NULL; + size_t response_size = 0; + if (getline (&response, &response_size, confirm_file) < 0) + confirm_file_EOF = 1; + else + status = rpmatch (response) > 0; + free (response); + } - for (character = reply; - character != '\n'; - character = getc (confirm_file)) - if (character == EOF) - { - confirm_file_EOF = 1; - fputc ('\n', stdlis); - fflush (stdlis); - break; - } - return reply == 'y' || reply == 'Y'; - } + if (confirm_file_EOF) + { + fputc ('\n', stdlis); + fflush (stdlis); + } + + return status; +} + +static struct fmttab { + char const *name; + enum archive_format fmt; +} const fmttab[] = { + { "v7", V7_FORMAT }, + { "oldgnu", OLDGNU_FORMAT }, + { "ustar", USTAR_FORMAT }, + { "posix", POSIX_FORMAT }, +#if 0 /* not fully supported yet */ + { "star", STAR_FORMAT }, +#endif + { "gnu", GNU_FORMAT }, + { "pax", POSIX_FORMAT }, /* An alias for posix */ + { NULL, 0 } +}; + +static void +set_archive_format (char const *name) +{ + struct fmttab const *p; + + for (p = fmttab; strcmp (p->name, name) != 0; ) + if (! (++p)->name) + USAGE_ERROR ((0, 0, _("%s: Invalid archive format"), + quotearg_colon (name))); + + archive_format = p->fmt; +} + +const char * +archive_format_string (enum archive_format fmt) +{ + struct fmttab const *p; + + for (p = fmttab; p->name; p++) + if (p->fmt == fmt) + return p->name; + return "unknown?"; +} + +#define FORMAT_MASK(n) (1<<(n)) + +static void +assert_format(unsigned fmt_mask) +{ + if ((FORMAT_MASK (archive_format) & fmt_mask) == 0) + USAGE_ERROR ((0, 0, + _("GNU features wanted on incompatible archive format"))); +} + +const char * +subcommand_string (enum subcommand c) +{ + switch (c) + { + case UNKNOWN_SUBCOMMAND: + return "unknown?"; + + case APPEND_SUBCOMMAND: + return "-r"; + + case CAT_SUBCOMMAND: + return "-A"; + + case CREATE_SUBCOMMAND: + return "-c"; + + case DELETE_SUBCOMMAND: + return "-D"; + + case DIFF_SUBCOMMAND: + return "-d"; + + case EXTRACT_SUBCOMMAND: + return "-x"; + + case LIST_SUBCOMMAND: + return "-t"; + + case UPDATE_SUBCOMMAND: + return "-u"; + + default: + abort (); + } +} + +void +tar_list_quoting_styles (FILE *fp, char *prefix) +{ + int i; + + for (i = 0; quoting_style_args[i]; i++) + fprintf (fp, "%s%s\n", prefix, quoting_style_args[i]); +} + +void +tar_set_quoting_style (char *arg) +{ + int i; + + for (i = 0; quoting_style_args[i]; i++) + if (strcmp (arg, quoting_style_args[i]) == 0) + { + set_quoting_style (NULL, i); + return; + } + FATAL_ERROR ((0, 0, + _("Unknown quoting style `%s'. Try `%s --quoting-style=help' to get a list."), arg)); } + /* Options. */ -/* For long options that unconditionally set a single flag, we have getopt - do it. For the others, we share the code for the equivalent short - named option, the name of which is stored in the otherwise-unused `val' - field of the `struct option'; for long options that have no equivalent - short option, we use non-characters as pseudo short options, - starting at CHAR_MAX + 1 and going upwards. */ - enum { ANCHORED_OPTION = CHAR_MAX + 1, + ATIME_PRESERVE_OPTION, BACKUP_OPTION, + CHECKPOINT_OPTION, + CHECK_LINKS_OPTION, + DELAY_DIRECTORY_RESTORE_OPTION, DELETE_OPTION, + EXCLUDE_CACHES_OPTION, EXCLUDE_OPTION, + FORCE_LOCAL_OPTION, GROUP_OPTION, + HANG_OPTION, IGNORE_CASE_OPTION, + IGNORE_COMMAND_ERROR_OPTION, + IGNORE_FAILED_READ_OPTION, + INDEX_FILE_OPTION, + KEEP_NEWER_FILES_OPTION, MODE_OPTION, NEWER_MTIME_OPTION, NO_ANCHORED_OPTION, + NO_DELAY_DIRECTORY_RESTORE_OPTION, NO_IGNORE_CASE_OPTION, - NO_WILDCARDS_OPTION, + NO_IGNORE_COMMAND_ERROR_OPTION, + NO_OVERWRITE_DIR_OPTION, + NO_QUOTE_CHARS_OPTION, + NO_RECURSION_OPTION, + NO_SAME_OWNER_OPTION, + NO_SAME_PERMISSIONS_OPTION, + NO_UNQUOTE_OPTION, NO_WILDCARDS_MATCH_SLASH_OPTION, + NO_WILDCARDS_OPTION, NULL_OPTION, + NUMERIC_OWNER_OPTION, + OCCURRENCE_OPTION, + OLD_ARCHIVE_OPTION, + ONE_FILE_SYSTEM_OPTION, OVERWRITE_OPTION, - OVERWRITE_DIR_OPTION, OWNER_OPTION, + PAX_OPTION, POSIX_OPTION, PRESERVE_OPTION, + QUOTE_CHARS_OPTION, + QUOTING_STYLE_OPTION, RECORD_SIZE_OPTION, + RECURSION_OPTION, + RECURSIVE_UNLINK_OPTION, + REMOVE_FILES_OPTION, + RESTRICT_OPTION, + RMT_COMMAND_OPTION, RSH_COMMAND_OPTION, + SAME_OWNER_OPTION, + SHOW_DEFAULTS_OPTION, + SHOW_OMITTED_DIRS_OPTION, + SHOW_STORED_NAMES_OPTION, + STRIP_COMPONENTS_OPTION, SUFFIX_OPTION, + TEST_LABEL_OPTION, + TOTALS_OPTION, + TO_COMMAND_OPTION, + UNQUOTE_OPTION, + USAGE_OPTION, USE_COMPRESS_PROGRAM_OPTION, + UTC_OPTION, + VERSION_OPTION, VOLNO_FILE_OPTION, - WILDCARDS_OPTION, WILDCARDS_MATCH_SLASH_OPTION, - - /* Some cleanup is being made in GNU tar long options. Using old names is - allowed for a while, but will also send a warning to stderr. Take old - names out in 1.14, or in summer 1997, whichever happens last. */ - - OBSOLETE_ABSOLUTE_NAMES, - OBSOLETE_BLOCK_COMPRESS, - OBSOLETE_BLOCKING_FACTOR, - OBSOLETE_BLOCK_NUMBER, - OBSOLETE_READ_FULL_RECORDS, - OBSOLETE_TOUCH, - OBSOLETE_VERSION_CONTROL -}; - -/* If nonzero, display usage information and exit. */ -static int show_help; - -/* If nonzero, print the version on standard output and exit. */ -static int show_version; - -static struct option long_options[] = -{ - {"absolute-names", no_argument, 0, 'P'}, - {"absolute-paths", no_argument, 0, OBSOLETE_ABSOLUTE_NAMES}, - {"after-date", required_argument, 0, 'N'}, - {"anchored", no_argument, 0, ANCHORED_OPTION}, - {"append", no_argument, 0, 'r'}, - {"atime-preserve", no_argument, &atime_preserve_option, 1}, - {"backup", optional_argument, 0, BACKUP_OPTION}, - {"block-compress", no_argument, 0, OBSOLETE_BLOCK_COMPRESS}, - {"block-number", no_argument, 0, 'R'}, - {"block-size", required_argument, 0, OBSOLETE_BLOCKING_FACTOR}, - {"blocking-factor", required_argument, 0, 'b'}, - {"bzip2", no_argument, 0, 'j'}, - {"catenate", no_argument, 0, 'A'}, - {"checkpoint", no_argument, &checkpoint_option, 1}, - {"compare", no_argument, 0, 'd'}, - {"compress", no_argument, 0, 'Z'}, - {"concatenate", no_argument, 0, 'A'}, - {"confirmation", no_argument, 0, 'w'}, - /* FIXME: --selective as a synonym for --confirmation? */ - {"create", no_argument, 0, 'c'}, - {"delete", no_argument, 0, DELETE_OPTION}, - {"dereference", no_argument, 0, 'h'}, - {"diff", no_argument, 0, 'd'}, - {"directory", required_argument, 0, 'C'}, - {"exclude", required_argument, 0, EXCLUDE_OPTION}, - {"exclude-from", required_argument, 0, 'X'}, - {"extract", no_argument, 0, 'x'}, - {"file", required_argument, 0, 'f'}, - {"files-from", required_argument, 0, 'T'}, - {"force-local", no_argument, &force_local_option, 1}, - {"get", no_argument, 0, 'x'}, - {"group", required_argument, 0, GROUP_OPTION}, - {"gunzip", no_argument, 0, 'z'}, - {"gzip", no_argument, 0, 'z'}, - {"help", no_argument, &show_help, 1}, - {"ignore-case", no_argument, 0, IGNORE_CASE_OPTION}, - {"ignore-failed-read", no_argument, &ignore_failed_read_option, 1}, - {"ignore-zeros", no_argument, 0, 'i'}, - /* FIXME: --ignore-end as a new name for --ignore-zeros? */ - {"incremental", no_argument, 0, 'G'}, - {"info-script", required_argument, 0, 'F'}, - {"interactive", no_argument, 0, 'w'}, - {"keep-old-files", no_argument, 0, 'k'}, - {"label", required_argument, 0, 'V'}, - {"list", no_argument, 0, 't'}, - {"listed-incremental", required_argument, 0, 'g'}, - {"mode", required_argument, 0, MODE_OPTION}, - {"modification-time", no_argument, 0, OBSOLETE_TOUCH}, - {"multi-volume", no_argument, 0, 'M'}, - {"new-volume-script", required_argument, 0, 'F'}, - {"newer", required_argument, 0, 'N'}, - {"newer-mtime", required_argument, 0, NEWER_MTIME_OPTION}, - {"null", no_argument, 0, NULL_OPTION}, - {"no-anchored", no_argument, 0, NO_ANCHORED_OPTION}, - {"no-ignore-case", no_argument, 0, NO_IGNORE_CASE_OPTION}, - {"no-wildcards", no_argument, 0, NO_WILDCARDS_OPTION}, - {"no-wildcards-match-slash", no_argument, 0, NO_WILDCARDS_MATCH_SLASH_OPTION}, - {"no-recursion", no_argument, &recursion_option, 0}, - {"no-same-owner", no_argument, &same_owner_option, -1}, - {"no-same-permissions", no_argument, &same_permissions_option, -1}, - {"numeric-owner", no_argument, &numeric_owner_option, 1}, - {"old-archive", no_argument, 0, 'o'}, - {"one-file-system", no_argument, 0, 'l'}, - {"overwrite", no_argument, 0, OVERWRITE_OPTION}, - {"overwrite-dir", no_argument, 0, OVERWRITE_DIR_OPTION}, - {"owner", required_argument, 0, OWNER_OPTION}, - {"portability", no_argument, 0, 'o'}, - {"posix", no_argument, 0, POSIX_OPTION}, - {"preserve", no_argument, 0, PRESERVE_OPTION}, - {"preserve-order", no_argument, 0, 's'}, - {"preserve-permissions", no_argument, 0, 'p'}, - {"recursion", no_argument, &recursion_option, FNM_LEADING_DIR}, - {"recursive-unlink", no_argument, &recursive_unlink_option, 1}, - {"read-full-blocks", no_argument, 0, OBSOLETE_READ_FULL_RECORDS}, - {"read-full-records", no_argument, 0, 'B'}, - /* FIXME: --partial-blocks might be a synonym for --read-full-records? */ - {"record-number", no_argument, 0, OBSOLETE_BLOCK_NUMBER}, - {"record-size", required_argument, 0, RECORD_SIZE_OPTION}, - {"remove-files", no_argument, &remove_files_option, 1}, - {"rsh-command", required_argument, 0, RSH_COMMAND_OPTION}, - {"same-order", no_argument, 0, 's'}, - {"same-owner", no_argument, &same_owner_option, 1}, - {"same-permissions", no_argument, 0, 'p'}, - {"show-omitted-dirs", no_argument, &show_omitted_dirs_option, 1}, - {"sparse", no_argument, 0, 'S'}, - {"starting-file", required_argument, 0, 'K'}, - {"suffix", required_argument, 0, SUFFIX_OPTION}, - {"tape-length", required_argument, 0, 'L'}, - {"to-stdout", no_argument, 0, 'O'}, - {"totals", no_argument, &totals_option, 1}, - {"touch", no_argument, 0, 'm'}, - {"uncompress", no_argument, 0, 'Z'}, - {"ungzip", no_argument, 0, 'z'}, - {"unlink-first", no_argument, 0, 'U'}, - {"update", no_argument, 0, 'u'}, - {"use-compress-program", required_argument, 0, USE_COMPRESS_PROGRAM_OPTION}, - {"verbose", no_argument, 0, 'v'}, - {"verify", no_argument, 0, 'W'}, - {"version", no_argument, &show_version, 1}, - {"version-control", required_argument, 0, OBSOLETE_VERSION_CONTROL}, - {"volno-file", required_argument, 0, VOLNO_FILE_OPTION}, - {"wildcards", no_argument, 0, WILDCARDS_OPTION}, - {"wildcards-match-slash", no_argument, 0, WILDCARDS_MATCH_SLASH_OPTION}, - - {0, 0, 0, 0} + WILDCARDS_OPTION }; -/* Print a usage message and exit with STATUS. */ -static void -usage (int status) -{ - if (status != TAREXIT_SUCCESS) - fprintf (stderr, _("Try `%s --help' for more information.\n"), - program_name); - else - { - fputs (_("\ -GNU `tar' saves many files together into a single tape or disk archive, and\n\ -can restore individual files from the archive.\n"), - stdout); - printf (_("\nUsage: %s [OPTION]... [FILE]...\n\ +const char *argp_program_version = "tar (" PACKAGE_NAME ") " VERSION; +const char *argp_program_bug_address = "<" PACKAGE_BUGREPORT ">"; +static char doc[] = N_("GNU `tar' saves many files together into a single tape or disk archive, and can restore individual files from the archive.\n\ \n\ Examples:\n\ - %s -cf archive.tar foo bar # Create archive.tar from files foo and bar.\n\ - %s -tvf archive.tar # List all files in archive.tar verbosely.\n\ - %s -xf archive.tar # Extract all files from archive.tar.\n"), - program_name, program_name, program_name, program_name); - fputs (_("\ -\n\ -If a long option shows an argument as mandatory, then it is mandatory\n\ -for the equivalent short option also. Similarly for optional arguments.\n"), - stdout); - fputs(_("\ -\n\ -Main operation mode:\n\ - -t, --list list the contents of an archive\n\ - -x, --extract, --get extract files from an archive\n\ - -c, --create create a new archive\n\ - -d, --diff, --compare find differences between archive and file system\n\ - -r, --append append files to the end of an archive\n\ - -u, --update only append files newer than copy in archive\n\ - -A, --catenate append tar files to an archive\n\ - --concatenate same as -A\n\ - --delete delete from the archive (not on mag tapes!)\n"), - stdout); - fputs (_("\ -\n\ -Operation modifiers:\n\ - -W, --verify attempt to verify the archive after writing it\n\ - --remove-files remove files after adding them to the archive\n\ - -k, --keep-old-files don't replace existing files when extracting\n\ - --overwrite overwrite existing files when extracting\n\ - --overwrite-dir overwrite directory metadata when extracting\n\ - -U, --unlink-first remove each file prior to extracting over it\n\ - --recursive-unlink empty hierarchies prior to extracting directory\n\ - -S, --sparse handle sparse files efficiently\n\ - -O, --to-stdout extract files to standard output\n\ - -G, --incremental handle old GNU-format incremental backup\n\ - -g, --listed-incremental=FILE\n\ - handle new GNU-format incremental backup\n\ - --ignore-failed-read do not exit with nonzero on unreadable files\n"), - stdout); - fputs (_("\ -\n\ -Handling of file attributes:\n\ - --owner=NAME force NAME as owner for added files\n\ - --group=NAME force NAME as group for added files\n\ - --mode=CHANGES force (symbolic) mode CHANGES for added files\n\ - --atime-preserve don't change access times on dumped files\n\ - -m, --modification-time don't extract file modified time\n\ - --same-owner try extracting files with the same ownership\n\ - --no-same-owner extract files as yourself\n\ - --numeric-owner always use numbers for user/group names\n\ - -p, --same-permissions extract permissions information\n\ - --no-same-permissions do not extract permissions information\n\ - --preserve-permissions same as -p\n\ - -s, --same-order sort names to extract to match archive\n\ - --preserve-order same as -s\n\ - --preserve same as both -p and -s\n"), - stdout); - fputs (_("\ -\n\ -Device selection and switching:\n\ - -f, --file=ARCHIVE use archive file or device ARCHIVE\n\ - --force-local archive file is local even if has a colon\n\ - --rsh-command=COMMAND use remote COMMAND instead of rsh\n\ - -[0-7][lmh] specify drive and density\n\ - -M, --multi-volume create/list/extract multi-volume archive\n\ - -L, --tape-length=NUM change tape after writing NUM x 1024 bytes\n\ - -F, --info-script=FILE run script at end of each tape (implies -M)\n\ - --new-volume-script=FILE same as -F FILE\n\ - --volno-file=FILE use/update the volume number in FILE\n"), - stdout); - fputs (_("\ -\n\ -Device blocking:\n\ - -b, --blocking-factor=BLOCKS BLOCKS x 512 bytes per record\n\ - --record-size=SIZE SIZE bytes per record, multiple of 512\n\ - -i, --ignore-zeros ignore zeroed blocks in archive (means EOF)\n\ - -B, --read-full-records reblock as we read (for 4.2BSD pipes)\n"), - stdout); - fputs (_("\ -\n\ -Archive format selection:\n\ - -V, --label=NAME create archive with volume name NAME\n\ - PATTERN at list/extract time, a globbing PATTERN\n\ - -o, --old-archive, --portability write a V7 format archive\n\ - --posix write a POSIX format archive\n\ - -j, --bzip2 filter the archive through bzip2\n\ - -z, --gzip, --ungzip filter the archive through gzip\n\ - -Z, --compress, --uncompress filter the archive through compress\n\ - --use-compress-program=PROG filter through PROG (must accept -d)\n"), - stdout); - fputs (_("\ -\n\ -Local file selection:\n\ - -C, --directory=DIR change to directory DIR\n\ - -T, --files-from=NAME get names to extract or create from file NAME\n\ - --null -T reads null-terminated names, disable -C\n\ - --exclude=PATTERN exclude files, given as a PATTERN\n\ - -X, --exclude-from=FILE exclude patterns listed in FILE\n\ - --anchored exclude patterns match file name start (default)\n\ - --no-anchored exclude patterns match after any /\n\ - --ignore-case exclusion ignores case\n\ - --no-ignore-case exclusion is case sensitive (default)\n\ - --wildcards exclude patterns use wildcards (default)\n\ - --no-wildcards exclude patterns are plain strings\n\ - --wildcards-match-slash exclude pattern wildcards match '/' (default)\n\ - --no-wildcards-match-slash exclude pattern wildcards do not match '/'\n\ - -P, --absolute-names don't strip leading `/'s from file names\n\ - -h, --dereference dump instead the files symlinks point to\n\ - --no-recursion avoid descending automatically in directories\n\ - -l, --one-file-system stay in local file system when creating archive\n\ - -K, --starting-file=NAME begin at file NAME in the archive\n"), - stdout); -#if !MSDOS - fputs (_("\ - -N, --newer=DATE only store files newer than DATE\n\ - --newer-mtime=DATE compare date and time when data changed only\n\ - --after-date=DATE same as -N\n"), - stdout); -#endif - fputs (_("\ - --backup[=CONTROL] backup before removal, choose version control\n\ - --suffix=SUFFIX backup before removal, override usual suffix\n"), - stdout); - fputs (_("\ -\n\ -Informative output:\n\ - --help print this help, then exit\n\ - --version print tar program version number, then exit\n\ - -v, --verbose verbosely list files processed\n\ - --checkpoint print directory names while reading the archive\n\ - --totals print total bytes written while creating archive\n\ - -R, --block-number show block number within archive with each message\n\ - -w, --interactive ask for confirmation for every action\n\ - --confirmation same as -w\n"), - stdout); - fputs (_("\ -\n\ -The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\ -The version control may be set with --backup or VERSION_CONTROL, values are:\n\ -\n\ + tar -cf archive.tar foo bar # Create archive.tar from files foo and bar.\n\ + tar -tvf archive.tar # List all files in archive.tar verbosely.\n\ + tar -xf archive.tar # Extract all files from archive.tar.\n\ +\vThe backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\ +The version control may be set with --backup or VERSION_CONTROL, values are:\n\n\ + none, off never make backups\n\ t, numbered make numbered backups\n\ nil, existing numbered if numbered backups exist, simple otherwise\n\ - never, simple always make simple backups\n"), - stdout); - printf (_("\ -\n\ -GNU tar cannot read nor produce `--posix' archives. If POSIXLY_CORRECT\n\ -is set in the environment, GNU extensions are disallowed with `--posix'.\n\ -Support for POSIX is only partially implemented, don't count on it yet.\n\ -ARCHIVE may be FILE, HOST:FILE or USER@HOST:FILE; DATE may be a textual date\n\ -or a file name starting with `/' or `.', in which case the file's date is used.\n\ -*This* `tar' defaults to `-f%s -b%d'.\n"), - DEFAULT_ARCHIVE, DEFAULT_BLOCKING); - fputs (_("\nReport bugs to .\n"), stdout); - } - exit (status); -} + never, simple always make simple backups\n"); -/* Parse the options for tar. */ -/* Available option letters are DEHIJQY and aenqy. Some are reserved: +/* NOTE: + + Available option letters are DEIJQY and aeqy. Consider the following + assignments: + [For Solaris tar compatibility =/= Is it important at all?] e exit immediately with a nonzero exit status if unexpected errors occur - E use extended headers (draft POSIX headers, that is) - I same as T (for compatibility with Solaris tar) - n the archive is quickly seekable, so don't worry about random seeks - q stop after extracting the first occurrence of the named file + E use extended headers (--format=posix) + + [q alias for --occurrence=1 =/= this would better be used for quiet?] + [I same as T =/= will harm star compatibility] + y per-file gzip compression Y per-block gzip compression */ -#define OPTION_STRING \ - "-01234567ABC:F:GIK:L:MN:OPRST:UV:WX:Zb:cdf:g:hijklmoprstuvwxyz" +static struct argp_option options[] = { +#define GRID 10 + {NULL, 0, NULL, 0, + N_("Main operation mode:"), GRID }, + + {"list", 't', 0, 0, + N_("list the contents of an archive"), GRID+1 }, + {"extract", 'x', 0, 0, + N_("extract files from an archive"), GRID+1 }, + {"get", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"create", 'c', 0, 0, + N_("create a new archive"), GRID+1 }, + {"diff", 'd', 0, 0, + N_("find differences between archive and file system"), GRID+1 }, + {"compare", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"append", 'r', 0, 0, + N_("append files to the end of an archive"), GRID+1 }, + {"update", 'u', 0, 0, + N_("only append files newer than copy in archive"), GRID+1 }, + {"catenate", 'A', 0, 0, + N_("append tar files to an archive"), GRID+1 }, + {"concatenate", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"delete", DELETE_OPTION, 0, 0, + N_("delete from the archive (not on mag tapes!)"), GRID+1 }, + {"test-label", TEST_LABEL_OPTION, NULL, 0, + N_("Test archive volume label and exit"), GRID+1 }, +#undef GRID + +#define GRID 20 + {NULL, 0, NULL, 0, + N_("Operation modifiers:"), GRID }, + + {"sparse", 'S', 0, 0, + N_("handle sparse files efficiently"), GRID+1 }, + {"incremental", 'G', 0, 0, + N_("handle old GNU-format incremental backup"), GRID+1 }, + {"listed-incremental", 'g', N_("FILE"), 0, + N_("handle new GNU-format incremental backup"), GRID+1 }, + {"ignore-failed-read", IGNORE_FAILED_READ_OPTION, 0, 0, + N_("do not exit with nonzero on unreadable files"), GRID+1 }, + {"occurrence", OCCURRENCE_OPTION, N_("NUMBER"), OPTION_ARG_OPTIONAL, + N_("process only the NUMBERth occurrence of each file in the archive. This option is valid only in conjunction with one of the subcommands --delete, --diff, --extract or --list and when a list of files is given either on the command line or via -T option. NUMBER defaults to 1."), GRID+1 }, + {"seek", 'n', NULL, 0, + N_("archive is seekable"), GRID+1 }, +#undef GRID + +#define GRID 30 + {NULL, 0, NULL, 0, + N_("Overwrite control:\n"), GRID+1 }, + + {"verify", 'W', 0, 0, + N_("attempt to verify the archive after writing it"), GRID+1 }, + {"remove-files", REMOVE_FILES_OPTION, 0, 0, + N_("remove files after adding them to the archive"), GRID+1 }, + {"keep-old-files", 'k', 0, 0, + N_("don't replace existing files when extracting"), GRID+1 }, + {"keep-newer-files", KEEP_NEWER_FILES_OPTION, 0, 0, + N_("don't replace existing files that are newer than their archive copies"), GRID+1 }, + {"overwrite", OVERWRITE_OPTION, 0, 0, + N_("overwrite existing files when extracting"), GRID+1 }, + {"unlink-first", 'U', 0, 0, + N_("remove each file prior to extracting over it"), GRID+1 }, + {"recursive-unlink", RECURSIVE_UNLINK_OPTION, 0, 0, + N_("empty hierarchies prior to extracting directory"), GRID+1 }, + {"no-overwrite-dir", NO_OVERWRITE_DIR_OPTION, 0, 0, + N_("preserve metadata of existing directories"), GRID+1 }, +#undef GRID + +#define GRID 40 + {NULL, 0, NULL, 0, + N_("Select output stream:"), GRID }, + + {"to-stdout", 'O', 0, 0, + N_("extract files to standard output"), GRID+1 }, + {"to-command", TO_COMMAND_OPTION, N_("COMMAND"), 0, + N_("pipe extracted files to another program"), GRID+1 }, + {"ignore-command-error", IGNORE_COMMAND_ERROR_OPTION, 0, 0, + N_("ignore exit codes of children"), GRID+1 }, + {"no-ignore-command-error", NO_IGNORE_COMMAND_ERROR_OPTION, 0, 0, + N_("treat non-zero exit codes of children as error"), GRID+1 }, +#undef GRID + +#define GRID 50 + {NULL, 0, NULL, 0, + N_("Handling of file attributes:"), GRID }, + + {"owner", OWNER_OPTION, N_("NAME"), 0, + N_("force NAME as owner for added files"), GRID+1 }, + {"group", GROUP_OPTION, N_("NAME"), 0, + N_("force NAME as group for added files"), GRID+1 }, + {"mode", MODE_OPTION, N_("CHANGES"), 0, + N_("force (symbolic) mode CHANGES for added files"), GRID+1 }, + {"atime-preserve", ATIME_PRESERVE_OPTION, + N_("METHOD"), OPTION_ARG_OPTIONAL, + N_("preserve access times on dumped files, either by restoring the times" + " after reading (METHOD='replace'; default) or by not setting the times" + " in the first place (METHOD='system')"), GRID+1 }, + {"touch", 'm', 0, 0, + N_("don't extract file modified time"), GRID+1 }, + {"same-owner", SAME_OWNER_OPTION, 0, 0, + N_("try extracting files with the same ownership"), GRID+1 }, + {"no-same-owner", NO_SAME_OWNER_OPTION, 0, 0, + N_("extract files as yourself"), GRID+1 }, + {"numeric-owner", NUMERIC_OWNER_OPTION, 0, 0, + N_("always use numbers for user/group names"), GRID+1 }, + {"preserve-permissions", 'p', 0, 0, + N_("extract information about file permissions (default for superuser)"), + GRID+1 }, + {"same-permissions", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"no-same-permissions", NO_SAME_PERMISSIONS_OPTION, 0, 0, + N_("apply the user's umask when extracting permissions from the archive (default for ordinary users)"), GRID+1 }, + {"preserve-order", 's', 0, 0, + N_("sort names to extract to match archive"), GRID+1 }, + {"same-order", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"preserve", PRESERVE_OPTION, 0, 0, + N_("same as both -p and -s"), GRID+1 }, + {"delay-directory-restore", DELAY_DIRECTORY_RESTORE_OPTION, 0, 0, + N_("Delay setting modification times and permissions of extracted directories until the end of extraction."), GRID+1 }, + {"no-delay-directory-restore", NO_DELAY_DIRECTORY_RESTORE_OPTION, 0, 0, + N_("Cancel the effect of --delay-directory-restore option."), GRID+1 }, +#undef GRID + +#define GRID 60 + {NULL, 0, NULL, 0, + N_("Device selection and switching:\n"), GRID+1 }, + + {"file", 'f', N_("ARCHIVE"), 0, + N_("use archive file or device ARCHIVE"), GRID+1 }, + {"force-local", FORCE_LOCAL_OPTION, 0, 0, + N_("archive file is local even if it has a colon"), GRID+1 }, + {"rmt-command", RMT_COMMAND_OPTION, N_("COMMAND"), 0, + N_("use given rmt COMMAND instead of rmt"), GRID+1 }, + {"rsh-command", RSH_COMMAND_OPTION, N_("COMMAND"), 0, + N_("use remote COMMAND instead of rsh"), GRID+1 }, +#ifdef DEVICE_PREFIX + {"-[0-7][lmh]", 0, NULL, OPTION_DOC, /* It is OK, since `name' will never be + translated */ + N_("specify drive and density"), GRID+1 }, +#endif + {NULL, '0', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '1', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '2', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '3', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '4', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '5', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '6', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '7', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '8', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + {NULL, '9', NULL, OPTION_HIDDEN, NULL, GRID+1 }, + + {"multi-volume", 'M', 0, 0, + N_("create/list/extract multi-volume archive"), GRID+1 }, + {"tape-length", 'L', N_("NUMBER"), 0, + N_("change tape after writing NUMBER x 1024 bytes"), GRID+1 }, + {"info-script", 'F', N_("NAME"), 0, + N_("run script at end of each tape (implies -M)"), GRID+1 }, + {"new-volume-script", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"volno-file", VOLNO_FILE_OPTION, N_("FILE"), 0, + N_("use/update the volume number in FILE"), GRID+1 }, +#undef GRID + +#define GRID 70 + {NULL, 0, NULL, 0, + N_("Device blocking:"), GRID+1 }, + + {"blocking-factor", 'b', N_("BLOCKS"), 0, + N_("BLOCKS x 512 bytes per record"), GRID+1 }, + {"record-size", RECORD_SIZE_OPTION, N_("NUMBER"), 0, + N_("NUMBER of bytes per record, multiple of 512"), GRID+1 }, + {"ignore-zeros", 'i', 0, 0, + N_("ignore zeroed blocks in archive (means EOF)"), GRID+1 }, + {"read-full-records", 'B', 0, 0, + N_("reblock as we read (for 4.2BSD pipes)"), GRID+1 }, +#undef GRID + +#define GRID 80 + {NULL, 0, NULL, 0, + N_("Archive format selection:"), GRID }, + + {"format", 'H', N_("FORMAT"), 0, + N_("create archive of the given format."), GRID+1 }, + + {NULL, 0, NULL, 0, N_("FORMAT is one of the following:"), GRID+2 }, + {" v7", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, N_("old V7 tar format"), + GRID+3 }, + {" oldgnu", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, + N_("GNU format as per tar <= 1.12"), GRID+3 }, + {" gnu", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, + N_("GNU tar 1.13.x format"), GRID+3 }, + {" ustar", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, + N_("POSIX 1003.1-1988 (ustar) format"), GRID+3 }, + {" pax", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, + N_("POSIX 1003.1-2001 (pax) format"), GRID+3 }, + {" posix", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, N_("same as pax"), GRID+3 }, + + {"old-archive", OLD_ARCHIVE_OPTION, 0, 0, /* FIXME */ + N_("same as --format=v7"), GRID+8 }, + {"portability", 0, 0, OPTION_ALIAS, NULL, GRID+8 }, + {"posix", POSIX_OPTION, 0, 0, + N_("same as --format=posix"), GRID+8 }, + {"pax-option", PAX_OPTION, N_("keyword[[:]=value][,keyword[[:]=value], ...]"), 0, + N_("control pax keywords"), GRID+8 }, + {"label", 'V', N_("TEXT"), 0, + N_("create archive with volume name TEXT. At list/extract time, use TEXT as a globbing pattern for volume name"), GRID+8 }, + {"bzip2", 'j', 0, 0, + N_("filter the archive through bzip2"), GRID+8 }, + {"gzip", 'z', 0, 0, + N_("filter the archive through gzip"), GRID+8 }, + {"gunzip", 0, 0, OPTION_ALIAS, NULL, GRID+8 }, + {"ungzip", 0, 0, OPTION_ALIAS, NULL, GRID+8 }, + {"compress", 'Z', 0, 0, + N_("filter the archive through compress"), GRID+8 }, + {"uncompress", 0, 0, OPTION_ALIAS, NULL, GRID+8 }, + {"use-compress-program", USE_COMPRESS_PROGRAM_OPTION, N_("PROG"), 0, + N_("filter through PROG (must accept -d)"), GRID+8 }, +#undef GRID + +#define GRID 90 + {NULL, 0, NULL, 0, + N_("Local file selection:"), GRID }, + + {"add-file", ARGP_KEY_ARG, N_("FILE"), 0, + N_("add given FILE to the archive (useful if its name starts with a dash)"), GRID+1 }, + {"directory", 'C', N_("DIR"), 0, + N_("change to directory DIR"), GRID+1 }, + {"files-from", 'T', N_("FILE"), 0, + N_("get names to extract or create from FILE"), GRID+1 }, + {"null", NULL_OPTION, 0, 0, + N_("-T reads null-terminated names, disable -C"), GRID+1 }, + {"unquote", UNQUOTE_OPTION, 0, 0, + N_("unquote filenames read with -T (default)"), GRID+1 }, + {"no-unquote", NO_UNQUOTE_OPTION, 0, 0, + N_("do not unquote filenames read with -T"), GRID+1 }, + {"exclude", EXCLUDE_OPTION, N_("PATTERN"), 0, + N_("exclude files, given as a PATTERN"), GRID+1 }, + {"exclude-from", 'X', N_("FILE"), 0, + N_("exclude patterns listed in FILE"), GRID+1 }, + {"exclude-caches", EXCLUDE_CACHES_OPTION, 0, 0, + N_("exclude directories containing a cache tag"), GRID+1 }, + {"ignore-case", IGNORE_CASE_OPTION, 0, 0, + N_("exclusion ignores case"), GRID+1 }, + {"anchored", ANCHORED_OPTION, 0, 0, + N_("exclude patterns match file name start"), GRID+1 }, + {"no-anchored", NO_ANCHORED_OPTION, 0, 0, + N_("exclude patterns match after any `/' (default)"), GRID+1 }, + {"no-ignore-case", NO_IGNORE_CASE_OPTION, 0, 0, + N_("exclusion is case sensitive (default)"), GRID+1 }, + {"no-wildcards", NO_WILDCARDS_OPTION, 0, 0, + N_("exclude patterns are plain strings"), GRID+1 }, + {"no-wildcards-match-slash", NO_WILDCARDS_MATCH_SLASH_OPTION, 0, 0, + N_("exclude pattern wildcards do not match `/'"), GRID+1 }, + {"no-recursion", NO_RECURSION_OPTION, 0, 0, + N_("avoid descending automatically in directories"), GRID+1 }, + {"one-file-system", ONE_FILE_SYSTEM_OPTION, 0, 0, + N_("stay in local file system when creating archive"), GRID+1 }, + {NULL, 'l', 0, OPTION_HIDDEN, "", GRID+1 }, + {"recursion", RECURSION_OPTION, 0, 0, + N_("recurse into directories (default)"), GRID+1 }, + {"absolute-names", 'P', 0, 0, + N_("don't strip leading `/'s from file names"), GRID+1 }, + {"dereference", 'h', 0, 0, + N_("follow symlinks; archive and dump the files they point to"), GRID+1 }, + {"starting-file", 'K', N_("MEMBER-NAME"), 0, + N_("begin at member MEMBER-NAME in the archive"), GRID+1 }, + {"strip-components", STRIP_COMPONENTS_OPTION, N_("NUMBER"), 0, + N_("strip NUMBER leading components from file names"), GRID+1 }, + {"newer", 'N', N_("DATE-OR-FILE"), 0, + N_("only store files newer than DATE-OR-FILE"), GRID+1 }, + {"newer-mtime", NEWER_MTIME_OPTION, N_("DATE"), 0, + N_("compare date and time when data changed only"), GRID+1 }, + {"after-date", 'N', N_("DATE"), 0, + N_("same as -N"), GRID+1 }, + {"backup", BACKUP_OPTION, N_("CONTROL"), OPTION_ARG_OPTIONAL, + N_("backup before removal, choose version CONTROL"), GRID+1 }, + {"suffix", SUFFIX_OPTION, N_("STRING"), 0, + N_("backup before removal, override usual suffix ('~' unless overridden by environment variable SIMPLE_BACKUP_SUFFIX)"), GRID+1 }, + {"wildcards", WILDCARDS_OPTION, 0, 0, + N_("exclude patterns use wildcards (default)"), GRID+1 }, + {"wildcards-match-slash", WILDCARDS_MATCH_SLASH_OPTION, 0, 0, + N_("exclude pattern wildcards match `/' (default)"), GRID+1 }, +#undef GRID + +#define GRID 100 + {NULL, 0, NULL, 0, + N_("Informative output:"), GRID }, + + {"verbose", 'v', 0, 0, + N_("verbosely list files processed"), GRID+1 }, + {"checkpoint", CHECKPOINT_OPTION, 0, 0, + N_("display progress messages every 10th record"), GRID+1 }, + {"check-links", CHECK_LINKS_OPTION, 0, 0, + N_("print a message if not all links are dumped"), GRID+1 }, + {"totals", TOTALS_OPTION, 0, 0, + N_("print total bytes written while creating archive"), GRID+1 }, + {"utc", UTC_OPTION, 0, 0, + N_("print file modification dates in UTC"), GRID+1 }, + {"index-file", INDEX_FILE_OPTION, N_("FILE"), 0, + N_("send verbose output to FILE"), GRID+1 }, + {"block-number", 'R', 0, 0, + N_("show block number within archive with each message"), GRID+1 }, + {"interactive", 'w', 0, 0, + N_("ask for confirmation for every action"), GRID+1 }, + {"confirmation", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, + {"show-defaults", SHOW_DEFAULTS_OPTION, 0, 0, + N_("Show tar defaults"), GRID+1 }, + {"show-omitted-dirs", SHOW_OMITTED_DIRS_OPTION, 0, 0, + N_("When listing or extracting, list each directory that does not match search criteria"), GRID+1 }, + {"show-stored-names", SHOW_STORED_NAMES_OPTION, 0, 0, + N_("When creating archive in verbose mode, list member names as stored in the archive"), + GRID+1 }, + {"quoting-style", QUOTING_STYLE_OPTION, N_("STYLE"), 0, + N_("Set name quoting style. See below for valid STYLE values."), GRID+1 }, + {"quote-chars", QUOTE_CHARS_OPTION, N_("STRING"), 0, + N_("Additionally quote characters from STRING"), GRID+1 }, + {"no-quote-chars", NO_QUOTE_CHARS_OPTION, N_("STRING"), 0, + N_("Disable quoting for characters from STRING"), GRID+1 }, +#undef GRID + +#define GRID 110 + {NULL, 0, NULL, 0, + N_("Compatibility options:"), GRID }, + + {NULL, 'o', 0, 0, + N_("when creating, same as --old-archive. When extracting, same as --no-same-owner"), GRID+1 }, +#undef GRID + +#define GRID 120 + {NULL, 0, NULL, 0, + N_("Other options:"), GRID }, + + {"restrict", RESTRICT_OPTION, 0, 0, + N_("Restrict use of some potentially harmful options"), -1 }, + + {"help", '?', 0, 0, N_("Give this help list"), -1}, + {"usage", USAGE_OPTION, 0, 0, N_("Give a short usage message"), -1}, + {"version", VERSION_OPTION, 0, 0, N_("Print program version"), -1}, + /* FIXME -V (--label) conflicts with the default short option for + --version */ + {"HANG", HANG_OPTION, "SECS", OPTION_ARG_OPTIONAL | OPTION_HIDDEN, + N_("Hang for SECS seconds (default 3600)"), 0}, +#undef GRID + + {0, 0, 0, 0, 0, 0} +}; + +static char const *const atime_preserve_args[] = +{ + "replace", "system", NULL +}; +static enum atime_preserve const atime_preserve_types[] = +{ + replace_atime_preserve, system_atime_preserve +}; +ARGMATCH_VERIFY (atime_preserve_args, atime_preserve_types); + + +struct tar_args { + char const *textual_date_option; + int exclude_options; + bool o_option; + int pax_option; + char const *backup_suffix_string; + char const *version_control_string; + int input_files; +}; + +static void +show_default_settings (FILE *stream) +{ + fprintf (stream, + "--format=%s -f%s -b%d --quoting-style=%s --rmt-command=%s", + archive_format_string (DEFAULT_ARCHIVE_FORMAT), + DEFAULT_ARCHIVE, DEFAULT_BLOCKING, + quoting_style_args[DEFAULT_QUOTING_STYLE], + DEFAULT_RMT_COMMAND); +#ifdef REMOTE_SHELL + fprintf (stream, " --rsh-command=%s", REMOTE_SHELL); +#endif + fprintf (stream, "\n"); +} static void set_subcommand_option (enum subcommand subcommand) @@ -483,687 +736,1105 @@ set_subcommand_option (enum subcommand subcommand) static void set_use_compress_program_option (const char *string) { - if (use_compress_program_option && strcmp (use_compress_program_option, string) != 0) + if (use_compress_program_option + && strcmp (use_compress_program_option, string) != 0) USAGE_ERROR ((0, 0, _("Conflicting compression options"))); use_compress_program_option = string; } +static volatile int _argp_hang; + +enum read_file_list_state /* Result of reading file name from the list file */ + { + file_list_success, /* OK, name read successfully */ + file_list_end, /* End of list file */ + file_list_zero /* Zero separator encountered where it should not */ + }; + +/* Read from FP a sequence of characters up to FILENAME_TERMINATOR and put them + into STK. + */ +static enum read_file_list_state +read_name_from_file (FILE *fp, struct obstack *stk) +{ + int c; + size_t counter = 0; + + for (c = getc (fp); c != EOF && c != filename_terminator; c = getc (fp)) + { + if (c == 0) + { + /* We have read a zero separator. The file possibly is + zero-separated */ + /* FATAL_ERROR((0, 0, N_("file name contains null character"))); */ + return file_list_zero; + } + obstack_1grow (stk, c); + counter++; + } + + obstack_1grow (stk, 0); + + return (counter == 0 && c == EOF) ? file_list_end : file_list_success; +} + + +static bool files_from_option; /* When set, tar will not refuse to create + empty archives */ +static struct obstack argv_stk; /* Storage for additional command line options + read using -T option */ + +/* Prevent recursive inclusion of the same file */ +struct file_id_list +{ + struct file_id_list *next; + ino_t ino; + dev_t dev; +}; + +static struct file_id_list *file_id_list; + static void -decode_options (int argc, char **argv) +add_file_id (const char *filename) { - int optchar; /* option letter */ - int input_files; /* number of input files */ - const char *backup_suffix_string; - const char *version_control_string = 0; - int exclude_options = EXCLUDE_WILDCARDS; + struct file_id_list *p; + struct stat st; - /* Set some default option values. */ + if (stat (filename, &st)) + stat_fatal (filename); + for (p = file_id_list; p; p = p->next) + if (p->ino == st.st_ino && p->dev == st.st_dev) + { + FATAL_ERROR ((0, 0, _("%s: file list already read"), + quotearg_colon (filename))); + } + p = xmalloc (sizeof *p); + p->next = file_id_list; + p->ino = st.st_ino; + p->dev = st.st_dev; + file_id_list = p; +} - subcommand_option = UNKNOWN_SUBCOMMAND; - archive_format = DEFAULT_FORMAT; - blocking_factor = DEFAULT_BLOCKING; - record_size = DEFAULT_BLOCKING * BLOCKSIZE; - excluded = new_exclude (); - newer_mtime_option = TYPE_MINIMUM (time_t); - recursion_option = FNM_LEADING_DIR; +/* Default density numbers for [0-9][lmh] device specifications */ - owner_option = -1; - group_option = -1; +#ifndef LOW_DENSITY_NUM +# define LOW_DENSITY_NUM 0 +#endif - backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX"); +#ifndef MID_DENSITY_NUM +# define MID_DENSITY_NUM 8 +#endif - /* Convert old-style tar call by exploding option element and rearranging - options accordingly. */ +#ifndef HIGH_DENSITY_NUM +# define HIGH_DENSITY_NUM 16 +#endif - if (argc > 1 && argv[1][0] != '-') +static void +update_argv (const char *filename, struct argp_state *state) +{ + FILE *fp; + size_t count = 0, i; + char *start, *p; + char **new_argv; + size_t new_argc; + bool is_stdin = false; + enum read_file_list_state read_state; + + if (!strcmp (filename, "-")) { - int new_argc; /* argc value for rearranged arguments */ - char **new_argv; /* argv value for rearranged arguments */ - char *const *in; /* cursor into original argv */ - char **out; /* cursor into rearranged argv */ - const char *letter; /* cursor into old option letters */ - char buffer[3]; /* constructed option buffer */ - const char *cursor; /* cursor in OPTION_STRING */ + is_stdin = true; + request_stdin ("-T"); + fp = stdin; + } + else + { + add_file_id (filename); + if ((fp = fopen (filename, "r")) == NULL) + open_fatal (filename); + } - /* Initialize a constructed option. */ + while ((read_state = read_name_from_file (fp, &argv_stk)) == file_list_success) + count++; - buffer[0] = '-'; - buffer[2] = '\0'; + if (read_state == file_list_zero) + { + size_t size; + + WARN ((0, 0, N_("%s: file name read contains nul character"), + quotearg_colon (filename))); + + /* Prepare new stack contents */ + size = obstack_object_size (&argv_stk); + p = obstack_finish (&argv_stk); + for (; size > 0; size--, p++) + if (*p) + obstack_1grow (&argv_stk, *p); + else + obstack_1grow (&argv_stk, '\n'); + obstack_1grow (&argv_stk, 0); + count = 1; + + /* Read rest of files using new filename terminator */ + filename_terminator = 0; + while (read_name_from_file (fp, &argv_stk) == file_list_success) + count++; + } - /* Allocate a new argument array, and copy program name in it. */ + if (!is_stdin) + fclose (fp); - new_argc = argc - 1 + strlen (argv[1]); - new_argv = xmalloc (new_argc * sizeof (char *)); - in = argv; - out = new_argv; - *out++ = *in++; + if (count == 0) + return; - /* Copy each old letter option as a separate option, and have the - corresponding argument moved next to it. */ + start = obstack_finish (&argv_stk); - for (letter = *in++; *letter; letter++) + if (filename_terminator == 0) + for (p = start; *p; p += strlen (p) + 1) + if (p[0] == '-') + count++; + + new_argc = state->argc + count; + new_argv = xmalloc (sizeof (state->argv[0]) * (new_argc + 1)); + memcpy (new_argv, state->argv, sizeof (state->argv[0]) * (state->argc + 1)); + state->argv = new_argv; + memmove (&state->argv[state->next + count], &state->argv[state->next], + (state->argc - state->next + 1) * sizeof (state->argv[0])); + + state->argc = new_argc; + + for (i = state->next, p = start; *p; p += strlen (p) + 1, i++) + { + if (filename_terminator == 0 && p[0] == '-') + state->argv[i++] = "--add-file"; + state->argv[i] = p; + } +} + + +static error_t +parse_opt (int key, char *arg, struct argp_state *state) +{ + struct tar_args *args = state->input; + + switch (key) + { + case ARGP_KEY_ARG: + /* File name or non-parsed option, because of ARGP_IN_ORDER */ + name_add (arg); + args->input_files++; + break; + + case 'A': + set_subcommand_option (CAT_SUBCOMMAND); + break; + + case 'b': + { + uintmax_t u; + if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK + && u == (blocking_factor = u) + && 0 < blocking_factor + && u == (record_size = u * BLOCKSIZE) / BLOCKSIZE)) + USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid blocking factor"))); + } + break; + + case 'B': + /* Try to reblock input records. For reading 4.2BSD pipes. */ + + /* It would surely make sense to exchange -B and -R, but it seems + that -B has been used for a long while in Sun tar and most + BSD-derived systems. This is a consequence of the block/record + terminology confusion. */ + + read_full_records_option = true; + break; + + case 'c': + set_subcommand_option (CREATE_SUBCOMMAND); + break; + + case 'C': + name_add ("-C"); + name_add (arg); + break; + + case 'd': + set_subcommand_option (DIFF_SUBCOMMAND); + break; + + case 'f': + if (archive_names == allocated_archive_names) { - buffer[1] = *letter; - *out++ = xstrdup (buffer); - cursor = strchr (OPTION_STRING, *letter); - if (cursor && cursor[1] == ':') - { - if (in < argv + argc) - *out++ = *in++; - else - USAGE_ERROR ((0, 0, _("Old option `%c' requires an argument."), - *letter)); - } + allocated_archive_names *= 2; + archive_name_array = + xrealloc (archive_name_array, + sizeof (const char *) * allocated_archive_names); } + archive_name_array[archive_names++] = arg; + break; - /* Copy all remaining options. */ + case 'F': + /* Since -F is only useful with -M, make it implied. Run this + script at the end of each tape. */ - while (in < argv + argc) - *out++ = *in++; + info_script_option = arg; + multi_volume_option = true; + break; - /* Replace the old option list by the new one. */ + case 'g': + listed_incremental_option = arg; + after_date_option = true; + /* Fall through. */ - argc = new_argc; - argv = new_argv; - } + case 'G': + /* We are making an incremental dump (FIXME: are we?); save + directories at the beginning of the archive, and include in each + directory its contents. */ - /* Parse all options and non-options as they appear. */ + incremental_option = true; + break; - input_files = 0; + case 'h': + /* Follow symbolic links. */ + dereference_option = true; + break; - prepend_default_options (getenv ("TAR_OPTIONS"), &argc, &argv); + case 'i': + /* Ignore zero blocks (eofs). This can't be the default, + because Unix tar writes two blocks of zeros, then pads out + the record with garbage. */ + + ignore_zeros_option = true; + break; + + case 'I': + USAGE_ERROR ((0, 0, + _("Warning: the -I option is not supported;" + " perhaps you meant -j or -T?"))); + break; + + case 'j': + set_use_compress_program_option ("bzip2"); + break; - while (optchar = getopt_long (argc, argv, OPTION_STRING, long_options, 0), - optchar != -1) - switch (optchar) + case 'k': + /* Don't replace existing files. */ + old_files_option = KEEP_OLD_FILES; + break; + + case 'K': + starting_file_option = true; + addname (arg, 0); + break; + + case 'l': + /* Historically equivalent to --one-file-system. This usage is + incompatible with UNIX98 and POSIX specs and therefore is + deprecated. The semantics of -l option will be changed in + future versions. See TODO. + */ + WARN ((0, 0, + _("Semantics of -l option will change in the future releases."))); + WARN ((0, 0, + _("Please use --one-file-system option instead."))); + /* FALL THROUGH */ + case ONE_FILE_SYSTEM_OPTION: + /* When dumping directories, don't dump files/subdirectories + that are on other filesystems. */ + one_file_system_option = true; + break; + + case 'L': { - case '?': - usage (TAREXIT_FAILURE); + uintmax_t u; + if (xstrtoumax (arg, 0, 10, &u, "") != LONGINT_OK) + USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid tape length"))); + tape_length_option = 1024 * (tarlong) u; + multi_volume_option = true; + } + break; - case 0: - break; + case 'm': + touch_option = true; + break; - case 1: - /* File name or non-parsed option, because of RETURN_IN_ORDER - ordering triggered by the leading dash in OPTION_STRING. */ + case 'M': + /* Make multivolume archive: when we can't write any more into + the archive, re-open it, and continue writing. */ - name_add (optarg); - input_files++; - break; + multi_volume_option = true; + break; - case 'A': - set_subcommand_option (CAT_SUBCOMMAND); - break; + case 'n': + seekable_archive = true; + break; - case OBSOLETE_BLOCK_COMPRESS: - WARN ((0, 0, _("Obsolete option, now implied by --blocking-factor"))); - break; + case 'N': + after_date_option = true; + /* Fall through. */ - case OBSOLETE_BLOCKING_FACTOR: - WARN ((0, 0, _("Obsolete option name replaced by --blocking-factor"))); - /* Fall through. */ + case NEWER_MTIME_OPTION: + if (NEWER_OPTION_INITIALIZED (newer_mtime_option)) + USAGE_ERROR ((0, 0, _("More than one threshold date"))); - case 'b': + if (FILE_SYSTEM_PREFIX_LEN (arg) != 0 + || ISSLASH (*arg) + || *arg == '.') { - uintmax_t u; - if (! (xstrtoumax (optarg, 0, 10, &u, "") == LONGINT_OK - && u == (blocking_factor = u) - && 0 < blocking_factor - && u == (record_size = u * BLOCKSIZE) / BLOCKSIZE)) - USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg), - _("Invalid blocking factor"))); + struct stat st; + if (deref_stat (dereference_option, arg, &st) != 0) + { + stat_error (arg); + USAGE_ERROR ((0, 0, _("Date sample file not found"))); + } + newer_mtime_option = get_stat_mtime (&st); + } + else + { + if (! get_date (&newer_mtime_option, arg, NULL)) + { + WARN ((0, 0, _("Substituting %s for unknown date format %s"), + tartime (newer_mtime_option, false), quote (arg))); + newer_mtime_option.tv_nsec = 0; + } + else + args->textual_date_option = arg; } - break; - case OBSOLETE_READ_FULL_RECORDS: - WARN ((0, 0, - _("Obsolete option name replaced by --read-full-records"))); - /* Fall through. */ + break; - case 'B': - /* Try to reblock input records. For reading 4.2BSD pipes. */ + case 'o': + args->o_option = true; + break; - /* It would surely make sense to exchange -B and -R, but it seems - that -B has been used for a long while in Sun tar ans most - BSD-derived systems. This is a consequence of the block/record - terminology confusion. */ + case 'O': + to_stdout_option = true; + break; - read_full_records_option = 1; - break; + case 'p': + same_permissions_option = true; + break; - case 'c': - set_subcommand_option (CREATE_SUBCOMMAND); - break; + case 'P': + absolute_names_option = true; + break; - case 'C': - name_add ("-C"); - name_add (optarg); - break; + case 'r': + set_subcommand_option (APPEND_SUBCOMMAND); + break; - case 'd': - set_subcommand_option (DIFF_SUBCOMMAND); - break; + case 'R': + /* Print block numbers for debugging bad tar archives. */ - case 'f': - if (archive_names == allocated_archive_names) - { - allocated_archive_names *= 2; - archive_name_array = - xrealloc (archive_name_array, - sizeof (const char *) * allocated_archive_names); - } - archive_name_array[archive_names++] = optarg; - break; + /* It would surely make sense to exchange -B and -R, but it seems + that -B has been used for a long while in Sun tar ans most + BSD-derived systems. This is a consequence of the block/record + terminology confusion. */ - case 'F': - /* Since -F is only useful with -M, make it implied. Run this - script at the end of each tape. */ + block_number_option = true; + break; - info_script_option = optarg; - multi_volume_option = 1; - break; + case 's': + /* Names to extr are sorted. */ - case 'g': - listed_incremental_option = optarg; - after_date_option = 1; - /* Fall through. */ + same_order_option = true; + break; - case 'G': - /* We are making an incremental dump (FIXME: are we?); save - directories at the beginning of the archive, and include in each - directory its contents. */ + case 'S': + sparse_option = true; + break; - incremental_option = 1; - break; + case 't': + set_subcommand_option (LIST_SUBCOMMAND); + verbose_option++; + break; - case 'h': - /* Follow symbolic links. */ + case TEST_LABEL_OPTION: + set_subcommand_option (LIST_SUBCOMMAND); + test_label_option = true; + break; - dereference_option = 1; - break; + case 'T': + update_argv (arg, state); + /* Indicate we've been given -T option. This is for backward + compatibility only, so that `tar cfT archive /dev/null will + succeed */ + files_from_option = true; + break; - case 'i': - /* Ignore zero blocks (eofs). This can't be the default, - because Unix tar writes two blocks of zeros, then pads out - the record with garbage. */ + case 'u': + set_subcommand_option (UPDATE_SUBCOMMAND); + break; - ignore_zeros_option = 1; - break; + case 'U': + old_files_option = UNLINK_FIRST_OLD_FILES; + break; - case 'I': - USAGE_ERROR ((0, 0, - _("Warning: the -I option is not supported;" - " perhaps you meant -j or -T?"))); - break; + case UTC_OPTION: + utc_option = true; + break; - case 'j': - set_use_compress_program_option ("bzip2"); - break; + case 'v': + verbose_option++; + break; - case 'k': - /* Don't replace existing files. */ - old_files_option = KEEP_OLD_FILES; - break; + case 'V': + volume_label_option = arg; + break; - case 'K': - starting_file_option = 1; - addname (optarg, 0); - break; + case 'w': + interactive_option = true; + break; - case 'l': - /* When dumping directories, don't dump files/subdirectories - that are on other filesystems. */ + case 'W': + verify_option = true; + break; - one_file_system_option = 1; - break; + case 'x': + set_subcommand_option (EXTRACT_SUBCOMMAND); + break; - case 'L': + case 'X': + if (add_exclude_file (add_exclude, excluded, arg, + args->exclude_options | recursion_option, '\n') + != 0) { - uintmax_t u; - if (xstrtoumax (optarg, 0, 10, &u, "") != LONGINT_OK) - USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg), - _("Invalid tape length"))); - tape_length_option = 1024 * (tarlong) u; - multi_volume_option = 1; + int e = errno; + FATAL_ERROR ((0, e, "%s", quotearg_colon (arg))); } - break; + break; - case OBSOLETE_TOUCH: - WARN ((0, 0, _("Obsolete option name replaced by --touch"))); - /* Fall through. */ + case 'z': + set_use_compress_program_option ("gzip"); + break; - case 'm': - touch_option = 1; - break; + case 'Z': + set_use_compress_program_option ("compress"); + break; - case 'M': - /* Make multivolume archive: when we can't write any more into - the archive, re-open it, and continue writing. */ + case ANCHORED_OPTION: + args->exclude_options |= EXCLUDE_ANCHORED; + break; - multi_volume_option = 1; - break; + case ATIME_PRESERVE_OPTION: + atime_preserve_option = + (arg + ? XARGMATCH ("--atime-preserve", arg, + atime_preserve_args, atime_preserve_types) + : replace_atime_preserve); + if (! O_NOATIME && atime_preserve_option == system_atime_preserve) + FATAL_ERROR ((0, 0, + _("--atime-preserve='system' is not supported" + " on this platform"))); + break; -#if !MSDOS - case 'N': - after_date_option = 1; - /* Fall through. */ + case CHECKPOINT_OPTION: + checkpoint_option = true; + break; - case NEWER_MTIME_OPTION: - if (newer_mtime_option != TYPE_MINIMUM (time_t)) - USAGE_ERROR ((0, 0, _("More than one threshold date"))); + case BACKUP_OPTION: + backup_option = true; + if (arg) + args->version_control_string = arg; + break; - if (FILESYSTEM_PREFIX_LEN (optarg) != 0 - || ISSLASH (*optarg) - || *optarg == '.') - { - struct stat st; - if (deref_stat (dereference_option, optarg, &st) != 0) - { - stat_error (optarg); - USAGE_ERROR ((0, 0, _("Date file not found"))); - } - newer_mtime_option = st.st_mtime; - } - else - { - newer_mtime_option = get_date (optarg, 0); - if (newer_mtime_option == (time_t) -1) - WARN ((0, 0, _("Substituting %s for unknown date format %s"), - tartime (newer_mtime_option), quote (optarg))); - } + case DELAY_DIRECTORY_RESTORE_OPTION: + delay_directory_restore_option = true; + break; - break; -#endif /* not MSDOS */ + case NO_DELAY_DIRECTORY_RESTORE_OPTION: + delay_directory_restore_option = false; + break; + + case DELETE_OPTION: + set_subcommand_option (DELETE_SUBCOMMAND); + break; + + case EXCLUDE_OPTION: + add_exclude (excluded, arg, args->exclude_options | recursion_option); + break; + + case EXCLUDE_CACHES_OPTION: + exclude_caches_option = true; + break; + + case FORCE_LOCAL_OPTION: + force_local_option = true; + break; + + case 'H': + set_archive_format (arg); + break; + + case INDEX_FILE_OPTION: + index_file_name = arg; + break; + + case IGNORE_CASE_OPTION: + args->exclude_options |= FNM_CASEFOLD; + break; + + case IGNORE_COMMAND_ERROR_OPTION: + ignore_command_error_option = true; + break; + + case IGNORE_FAILED_READ_OPTION: + ignore_failed_read_option = true; + break; + + case KEEP_NEWER_FILES_OPTION: + old_files_option = KEEP_NEWER_FILES; + break; + + case GROUP_OPTION: + if (! (strlen (arg) < GNAME_FIELD_SIZE + && gname_to_gid (arg, &group_option))) + { + uintmax_t g; + if (xstrtoumax (arg, 0, 10, &g, "") == LONGINT_OK + && g == (gid_t) g) + group_option = g; + else + FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("%s: Invalid group"))); + } + break; + + case MODE_OPTION: + mode_option = mode_compile (arg); + if (!mode_option) + FATAL_ERROR ((0, 0, _("Invalid mode given on option"))); + initial_umask = umask (0); + umask (initial_umask); + break; + + case NO_ANCHORED_OPTION: + args->exclude_options &= ~ EXCLUDE_ANCHORED; + break; + + case NO_IGNORE_CASE_OPTION: + args->exclude_options &= ~ FNM_CASEFOLD; + break; + + case NO_IGNORE_COMMAND_ERROR_OPTION: + ignore_command_error_option = false; + break; + + case NO_OVERWRITE_DIR_OPTION: + old_files_option = NO_OVERWRITE_DIR_OLD_FILES; + break; + + case NO_QUOTE_CHARS_OPTION: + for (;*arg; arg++) + set_char_quoting (NULL, *arg, 0); + break; + + case NO_WILDCARDS_OPTION: + args->exclude_options &= ~ EXCLUDE_WILDCARDS; + break; + + case NO_WILDCARDS_MATCH_SLASH_OPTION: + args->exclude_options |= FNM_FILE_NAME; + break; + + case NULL_OPTION: + filename_terminator = '\0'; + break; + + case NUMERIC_OWNER_OPTION: + numeric_owner_option = true; + break; + + case OCCURRENCE_OPTION: + if (!arg) + occurrence_option = 1; + else + { + uintmax_t u; + if (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK) + occurrence_option = u; + else + FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid number"))); + } + break; + + case OVERWRITE_OPTION: + old_files_option = OVERWRITE_OLD_FILES; + break; + + case OWNER_OPTION: + if (! (strlen (arg) < UNAME_FIELD_SIZE + && uname_to_uid (arg, &owner_option))) + { + uintmax_t u; + if (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK + && u == (uid_t) u) + owner_option = u; + else + FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid owner"))); + } + break; + + case QUOTE_CHARS_OPTION: + for (;*arg; arg++) + set_char_quoting (NULL, *arg, 1); + break; - case 'o': - if (archive_format == DEFAULT_FORMAT) - archive_format = V7_FORMAT; - else if (archive_format != V7_FORMAT) - USAGE_ERROR ((0, 0, _("Conflicting archive format options"))); - break; + case QUOTING_STYLE_OPTION: + tar_set_quoting_style (arg); + break; - case 'O': - to_stdout_option = 1; - break; + case PAX_OPTION: + args->pax_option++; + xheader_set_option (arg); + break; - case 'p': - same_permissions_option = 1; - break; + case POSIX_OPTION: + set_archive_format ("posix"); + break; - case OBSOLETE_ABSOLUTE_NAMES: - WARN ((0, 0, _("Obsolete option name replaced by --absolute-names"))); - /* Fall through. */ + case PRESERVE_OPTION: + same_permissions_option = true; + same_order_option = true; + break; - case 'P': - absolute_names_option = 1; - break; + case RECORD_SIZE_OPTION: + { + uintmax_t u; + if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK + && u == (size_t) u)) + USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid record size"))); + record_size = u; + if (record_size % BLOCKSIZE != 0) + USAGE_ERROR ((0, 0, _("Record size must be a multiple of %d."), + BLOCKSIZE)); + blocking_factor = record_size / BLOCKSIZE; + } + break; - case 'r': - set_subcommand_option (APPEND_SUBCOMMAND); - break; + case RECURSIVE_UNLINK_OPTION: + recursive_unlink_option = true; + break; - case OBSOLETE_BLOCK_NUMBER: - WARN ((0, 0, _("Obsolete option name replaced by --block-number"))); - /* Fall through. */ + case REMOVE_FILES_OPTION: + remove_files_option = true; + break; - case 'R': - /* Print block numbers for debugging bad tar archives. */ + case RESTRICT_OPTION: + restrict_option = true; + break; - /* It would surely make sense to exchange -B and -R, but it seems - that -B has been used for a long while in Sun tar ans most - BSD-derived systems. This is a consequence of the block/record - terminology confusion. */ + case RMT_COMMAND_OPTION: + rmt_command = arg; + break; - block_number_option = 1; - break; + case RSH_COMMAND_OPTION: + rsh_command_option = arg; + break; - case 's': - /* Names to extr are sorted. */ + case SHOW_DEFAULTS_OPTION: + show_default_settings (stdout); + exit(0); - same_order_option = 1; - break; + case STRIP_COMPONENTS_OPTION: + { + uintmax_t u; + if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK + && u == (size_t) u)) + USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), + _("Invalid number of elements"))); + strip_name_components = u; + } + break; - case 'S': - sparse_option = 1; - break; + case SHOW_OMITTED_DIRS_OPTION: + show_omitted_dirs_option = true; + break; - case 't': - set_subcommand_option (LIST_SUBCOMMAND); - verbose_option++; - break; + case SHOW_STORED_NAMES_OPTION: + show_stored_names_option = true; + break; - case 'T': - files_from_option = optarg; - break; + case SUFFIX_OPTION: + backup_option = true; + args->backup_suffix_string = arg; + break; - case 'u': - set_subcommand_option (UPDATE_SUBCOMMAND); - break; + case TO_COMMAND_OPTION: + if (to_command_option) + USAGE_ERROR ((0, 0, _("Only one --to-command option allowed"))); + to_command_option = arg; + break; - case 'U': - old_files_option = UNLINK_FIRST_OLD_FILES; - break; + case TOTALS_OPTION: + totals_option = true; + break; - case 'v': - verbose_option++; - break; + case USE_COMPRESS_PROGRAM_OPTION: + set_use_compress_program_option (arg); + break; - case 'V': - volume_label_option = optarg; - break; + case VOLNO_FILE_OPTION: + volno_file_option = arg; + break; - case 'w': - interactive_option = 1; - break; + case WILDCARDS_OPTION: + args->exclude_options |= EXCLUDE_WILDCARDS; + break; - case 'W': - verify_option = 1; - break; + case WILDCARDS_MATCH_SLASH_OPTION: + args->exclude_options &= ~ FNM_FILE_NAME; + break; - case 'x': - set_subcommand_option (EXTRACT_SUBCOMMAND); - break; + case CHECK_LINKS_OPTION: + check_links_option = 1; + break; - case 'X': - if (add_exclude_file (add_exclude, excluded, optarg, - exclude_options | recursion_option, '\n') - != 0) - { - int e = errno; - FATAL_ERROR ((0, e, "%s", quotearg_colon (optarg))); - } - break; + case NO_RECURSION_OPTION: + recursion_option = 0; + break; - case 'y': - USAGE_ERROR ((0, 0, - _("Warning: the -y option is not supported;" - " perhaps you meant -j?"))); - break; + case NO_SAME_OWNER_OPTION: + same_owner_option = -1; + break; - case 'z': - set_use_compress_program_option ("gzip"); - break; + case NO_SAME_PERMISSIONS_OPTION: + same_permissions_option = -1; + break; - case 'Z': - set_use_compress_program_option ("compress"); - break; + case RECURSION_OPTION: + recursion_option = FNM_LEADING_DIR; + break; - case OBSOLETE_VERSION_CONTROL: - WARN ((0, 0, _("Obsolete option name replaced by --backup"))); - /* Fall through. */ + case SAME_OWNER_OPTION: + same_owner_option = 1; + break; - case ANCHORED_OPTION: - exclude_options |= EXCLUDE_ANCHORED; - break; + case UNQUOTE_OPTION: + unquote_option = true; + break; - case BACKUP_OPTION: - backup_option = 1; - if (optarg) - version_control_string = optarg; - break; + case NO_UNQUOTE_OPTION: + unquote_option = false; + break; - case DELETE_OPTION: - set_subcommand_option (DELETE_SUBCOMMAND); - break; + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': - case EXCLUDE_OPTION: - add_exclude (excluded, optarg, exclude_options | recursion_option); - break; +#ifdef DEVICE_PREFIX + { + int device = key - '0'; + int density; + static char buf[sizeof DEVICE_PREFIX + 10]; + char *cursor; - case IGNORE_CASE_OPTION: - exclude_options |= FNM_CASEFOLD; - break; + if (arg[1]) + argp_error (state, _("Malformed density argument: %s"), quote (arg)); - case GROUP_OPTION: - if (! (strlen (optarg) < GNAME_FIELD_SIZE - && gname_to_gid (optarg, &group_option))) - { - uintmax_t g; - if (xstrtoumax (optarg, 0, 10, &g, "") == LONGINT_OK - && g == (gid_t) g) - group_option = g; - else - FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg), - _("%s: Invalid group"))); - } - break; + strcpy (buf, DEVICE_PREFIX); + cursor = buf + strlen (buf); - case MODE_OPTION: - mode_option - = mode_compile (optarg, - MODE_MASK_EQUALS | MODE_MASK_PLUS | MODE_MASK_MINUS); - if (mode_option == MODE_INVALID) - FATAL_ERROR ((0, 0, _("Invalid mode given on option"))); - if (mode_option == MODE_MEMORY_EXHAUSTED) - xalloc_die (); - break; +#ifdef DENSITY_LETTER - case NO_ANCHORED_OPTION: - exclude_options &= ~ EXCLUDE_ANCHORED; - break; + sprintf (cursor, "%d%c", device, arg[0]); - case NO_IGNORE_CASE_OPTION: - exclude_options &= ~ FNM_CASEFOLD; - break; +#else /* not DENSITY_LETTER */ - case NO_WILDCARDS_OPTION: - exclude_options &= ~ EXCLUDE_WILDCARDS; - break; + switch (arg[0]) + { + case 'l': + device += LOW_DENSITY_NUM; + break; - case NO_WILDCARDS_MATCH_SLASH_OPTION: - exclude_options |= FNM_FILE_NAME; - break; + case 'm': + device += MID_DENSITY_NUM; + break; - case NULL_OPTION: - filename_terminator = '\0'; - break; + case 'h': + device += HIGH_DENSITY_NUM; + break; - case OVERWRITE_OPTION: - old_files_option = OVERWRITE_OLD_FILES; - break; + default: + argp_error (state, _("Unknown density: `%c'"), arg[0]); + } + sprintf (cursor, "%d", device); - case OVERWRITE_DIR_OPTION: - old_files_option = OVERWRITE_OLD_DIRS; - break; +#endif /* not DENSITY_LETTER */ - case OWNER_OPTION: - if (! (strlen (optarg) < UNAME_FIELD_SIZE - && uname_to_uid (optarg, &owner_option))) + if (archive_names == allocated_archive_names) { - uintmax_t u; - if (xstrtoumax (optarg, 0, 10, &u, "") == LONGINT_OK - && u == (uid_t) u) - owner_option = u; - else - FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg), - _("Invalid owner"))); + allocated_archive_names *= 2; + archive_name_array = + xrealloc (archive_name_array, + sizeof (const char *) * allocated_archive_names); } - break; + archive_name_array[archive_names++] = xstrdup (buf); + } + break; - case POSIX_OPTION: -#if OLDGNU_COMPATIBILITY - if (archive_format == DEFAULT_FORMAT) - archive_format = GNU_FORMAT; - else if (archive_format != GNU_FORMAT) - USAGE_ERROR ((0, 0, _("Conflicting archive format options"))); -#else - if (archive_format == DEFAULT_FORMAT) - archive_format = POSIX_FORMAT; - else if (archive_format != POSIX_FORMAT) - USAGE_ERROR ((0, 0, _("Conflicting archive format options"))); -#endif - break; +#else /* not DEVICE_PREFIX */ - case PRESERVE_OPTION: - same_permissions_option = 1; - same_order_option = 1; - break; + argp_error (state, + _("Options `-[0-7][lmh]' not supported by *this* tar")); - case RECORD_SIZE_OPTION: - { - uintmax_t u; - if (! (xstrtoumax (optarg, 0, 10, &u, "") == LONGINT_OK - && u == (size_t) u)) - USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg), - _("Invalid record size"))); - record_size = u; - if (record_size % BLOCKSIZE != 0) - USAGE_ERROR ((0, 0, _("Record size must be a multiple of %d."), - BLOCKSIZE)); - blocking_factor = record_size / BLOCKSIZE; - } - break; +#endif /* not DEVICE_PREFIX */ - case RSH_COMMAND_OPTION: - rsh_command_option = optarg; - break; + case '?': + state->flags |= ARGP_NO_EXIT; + argp_state_help (state, state->out_stream, + ARGP_HELP_STD_HELP & ~ARGP_HELP_BUG_ADDR); + fprintf (state->out_stream, "\n%s\n\n", + _("Valid arguments for --quoting-style options are:")); + tar_list_quoting_styles (state->out_stream, " "); + + fprintf (state->out_stream, _("\n*This* tar defaults to:\n")); + show_default_settings (state->out_stream); + fprintf (state->out_stream, "\n"); + fprintf (state->out_stream, _("Report bugs to %s.\n"), + argp_program_bug_address); + exit (0); + + case USAGE_OPTION: + argp_state_help (state, state->out_stream, + ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK); + break; - case SUFFIX_OPTION: - backup_option = 1; - backup_suffix_string = optarg; - break; + case VERSION_OPTION: + version_etc (state->out_stream, "tar", PACKAGE_NAME, VERSION, + "John Gilmore", "Jay Fenlason", (char *) NULL); + exit (0); - case USE_COMPRESS_PROGRAM_OPTION: - set_use_compress_program_option (optarg); - break; + case HANG_OPTION: + _argp_hang = atoi (arg ? arg : "3600"); + while (_argp_hang-- > 0) + sleep (1); + break; - case VOLNO_FILE_OPTION: - volno_file_option = optarg; - break; + default: + return ARGP_ERR_UNKNOWN; + } + return 0; +} - case WILDCARDS_OPTION: - exclude_options |= EXCLUDE_WILDCARDS; - break; +static struct argp argp = { + options, + parse_opt, + N_("[FILE]..."), + doc, + NULL, + NULL, + NULL +}; - case WILDCARDS_MATCH_SLASH_OPTION: - exclude_options &= ~ FNM_FILE_NAME; - break; +void +usage (int status) +{ + argp_help (&argp, stderr, ARGP_HELP_SEE, (char*) program_name); + exit (status); +} - case '0': - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': +/* Parse the options for tar. */ -#ifdef DEVICE_PREFIX - { - int device = optchar - '0'; - int density; - static char buf[sizeof DEVICE_PREFIX + 10]; - char *cursor; +static struct argp_option * +find_argp_option (struct argp_option *options, int letter) +{ + for (; + !(options->name == NULL + && options->key == 0 + && options->arg == 0 + && options->flags == 0 + && options->doc == NULL); options++) + if (options->key == letter) + return options; + return NULL; +} + +static void +decode_options (int argc, char **argv) +{ + int index; + struct tar_args args; - density = getopt_long (argc, argv, "lmh", 0, 0); - strcpy (buf, DEVICE_PREFIX); - cursor = buf + strlen (buf); + /* Set some default option values. */ + args.textual_date_option = NULL; + args.exclude_options = EXCLUDE_WILDCARDS; + args.o_option = 0; + args.pax_option = 0; + args.backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX"); + args.version_control_string = 0; + args.input_files = 0; -#ifdef DENSITY_LETTER + subcommand_option = UNKNOWN_SUBCOMMAND; + archive_format = DEFAULT_FORMAT; + blocking_factor = DEFAULT_BLOCKING; + record_size = DEFAULT_BLOCKING * BLOCKSIZE; + excluded = new_exclude (); + newer_mtime_option.tv_sec = TYPE_MINIMUM (time_t); + newer_mtime_option.tv_nsec = -1; + recursion_option = FNM_LEADING_DIR; + unquote_option = true; - sprintf (cursor, "%d%c", device, density); + owner_option = -1; + group_option = -1; -#else /* not DENSITY_LETTER */ + /* Convert old-style tar call by exploding option element and rearranging + options accordingly. */ - switch (density) - { - case 'l': -#ifdef LOW_NUM - device += LOW_NUM; -#endif - break; + if (argc > 1 && argv[1][0] != '-') + { + int new_argc; /* argc value for rearranged arguments */ + char **new_argv; /* argv value for rearranged arguments */ + char *const *in; /* cursor into original argv */ + char **out; /* cursor into rearranged argv */ + const char *letter; /* cursor into old option letters */ + char buffer[3]; /* constructed option buffer */ - case 'm': -#ifdef MID_NUM - device += MID_NUM; -#else - device += 8; -#endif - break; + /* Initialize a constructed option. */ - case 'h': -#ifdef HGH_NUM - device += HGH_NUM; -#else - device += 16; -#endif - break; + buffer[0] = '-'; + buffer[2] = '\0'; - default: - usage (TAREXIT_FAILURE); - } - sprintf (cursor, "%d", device); + /* Allocate a new argument array, and copy program name in it. */ -#endif /* not DENSITY_LETTER */ + new_argc = argc - 1 + strlen (argv[1]); + new_argv = xmalloc ((new_argc + 1) * sizeof (char *)); + in = argv; + out = new_argv; + *out++ = *in++; - if (archive_names == allocated_archive_names) + /* Copy each old letter option as a separate option, and have the + corresponding argument moved next to it. */ + + for (letter = *in++; *letter; letter++) + { + struct argp_option *opt; + + buffer[1] = *letter; + *out++ = xstrdup (buffer); + opt = find_argp_option (options, *letter); + if (opt && opt->arg) { - allocated_archive_names *= 2; - archive_name_array = - xrealloc (archive_name_array, - sizeof (const char *) * allocated_archive_names); + if (in < argv + argc) + *out++ = *in++; + else + USAGE_ERROR ((0, 0, _("Old option `%c' requires an argument."), + *letter)); } - archive_name_array[archive_names++] = buf; - - /* FIXME: How comes this works for many archives when buf is - not xstrdup'ed? */ } - break; -#else /* not DEVICE_PREFIX */ + /* Copy all remaining options. */ - USAGE_ERROR ((0, 0, - _("Options `-[0-7][lmh]' not supported by *this* tar"))); + while (in < argv + argc) + *out++ = *in++; + *out = 0; -#endif /* not DEVICE_PREFIX */ - } + /* Replace the old option list by the new one. */ - /* Handle operands after any "--" argument. */ - for (; optind < argc; optind++) - { - name_add (argv[optind]); - input_files++; + argc = new_argc; + argv = new_argv; } - /* Process trivial options. */ + /* Parse all options and non-options as they appear. */ + + prepend_default_options (getenv ("TAR_OPTIONS"), &argc, &argv); + + if (argp_parse (&argp, argc, argv, ARGP_IN_ORDER|ARGP_NO_HELP, + &index, &args)) + exit (1); - if (show_version) - { - printf ("tar (GNU %s) %s\n", PACKAGE, VERSION); - print_copyright ("2001 Free Software Foundation, Inc."); - puts (_("\ -This program comes with NO WARRANTY, to the extent permitted by law.\n\ -You may redistribute it under the terms of the GNU General Public License;\n\ -see the file named COPYING for details.")); - puts (_("Written by John Gilmore and Jay Fenlason.")); + /* Special handling for 'o' option: - exit (TAREXIT_SUCCESS); + GNU tar used to say "output old format". + UNIX98 tar says don't chown files after extracting (we use + "--no-same-owner" for this). + + The old GNU tar semantics is retained when used with --create + option, otherwise UNIX98 semantics is assumed */ + + if (args.o_option) + { + if (subcommand_option == CREATE_SUBCOMMAND) + { + /* GNU Tar <= 1.13 compatibility */ + set_archive_format ("v7"); + } + else + { + /* UNIX98 compatibility */ + same_owner_option = -1; + } } - if (show_help) - usage (TAREXIT_SUCCESS); + /* Handle operands after any "--" argument. */ + for (; index < argc; index++) + { + name_add (argv[index]); + args.input_files++; + } /* Derive option values and check option consistency. */ if (archive_format == DEFAULT_FORMAT) { -#if OLDGNU_COMPATIBILITY - archive_format = OLDGNU_FORMAT; -#else - archive_format = GNU_FORMAT; -#endif + if (args.pax_option) + archive_format = POSIX_FORMAT; + else + archive_format = DEFAULT_ARCHIVE_FORMAT; } - if (archive_format == GNU_FORMAT && getenv ("POSIXLY_CORRECT")) - archive_format = POSIX_FORMAT; - - if ((volume_label_option - || incremental_option || multi_volume_option || sparse_option) - && archive_format != OLDGNU_FORMAT && archive_format != GNU_FORMAT) + if ((volume_label_option && subcommand_option == CREATE_SUBCOMMAND) + || incremental_option + || multi_volume_option + || sparse_option) + assert_format (FORMAT_MASK (OLDGNU_FORMAT) + | FORMAT_MASK (GNU_FORMAT) + | FORMAT_MASK (POSIX_FORMAT)); + + if (multi_volume_option + && archive_format == POSIX_FORMAT + && subcommand_option == CREATE_SUBCOMMAND + && !tape_length_option) USAGE_ERROR ((0, 0, - _("GNU features wanted on incompatible archive format"))); + _("creating multi-volume archives in posix format requires using --tape-length (-L) option"))); + + if (occurrence_option) + { + if (!args.input_files) + USAGE_ERROR ((0, 0, + _("--occurrence is meaningless without a file list"))); + if (subcommand_option != DELETE_SUBCOMMAND + && subcommand_option != DIFF_SUBCOMMAND + && subcommand_option != EXTRACT_SUBCOMMAND + && subcommand_option != LIST_SUBCOMMAND) + USAGE_ERROR ((0, 0, + _("--occurrence cannot be used in the requested operation mode"))); + } + + if (seekable_archive && subcommand_option == DELETE_SUBCOMMAND) + { + /* The current code in delete.c is based on the assumption that + skip_member() reads all data from the archive. So, we should + make sure it won't use seeks. On the other hand, the same code + depends on the ability to backspace a record in the archive, + so setting seekable_archive to false is technically incorrect. + However, it is tested only in skip_member(), so it's not a + problem. */ + seekable_archive = false; + } if (archive_names == 0) { @@ -1180,42 +1851,91 @@ see the file named COPYING for details.")); if (archive_names > 1 && !multi_volume_option) USAGE_ERROR ((0, 0, - _("Multiple archive files requires `-M' option"))); + _("Multiple archive files require `-M' option"))); if (listed_incremental_option - && newer_mtime_option != TYPE_MINIMUM (time_t)) + && NEWER_OPTION_INITIALIZED (newer_mtime_option)) USAGE_ERROR ((0, 0, _("Cannot combine --listed-incremental with --newer"))); if (volume_label_option) { - size_t volume_label_max_len = - (sizeof current_header->header.name - - 1 /* for trailing '\0' */ - - (multi_volume_option - ? (sizeof " Volume " - - 1 /* for null at end of " Volume " */ - + INT_STRLEN_BOUND (int) /* for volume number */ - - 1 /* for sign, as 0 <= volno */) - : 0)); - if (volume_label_max_len < strlen (volume_label_option)) - USAGE_ERROR ((0, 0, - _("%s: Volume label is too long (limit is %lu bytes)"), - quotearg_colon (volume_label_option), - (unsigned long) volume_label_max_len)); + if (archive_format == GNU_FORMAT || archive_format == OLDGNU_FORMAT) + { + size_t volume_label_max_len = + (sizeof current_header->header.name + - 1 /* for trailing '\0' */ + - (multi_volume_option + ? (sizeof " Volume " + - 1 /* for null at end of " Volume " */ + + INT_STRLEN_BOUND (int) /* for volume number */ + - 1 /* for sign, as 0 <= volno */) + : 0)); + if (volume_label_max_len < strlen (volume_label_option)) + USAGE_ERROR ((0, 0, + ngettext ("%s: Volume label is too long (limit is %lu byte)", + "%s: Volume label is too long (limit is %lu bytes)", + volume_label_max_len), + quotearg_colon (volume_label_option), + (unsigned long) volume_label_max_len)); + } + /* else FIXME + Label length in PAX format is limited by the volume size. */ + } + + if (verify_option) + { + if (multi_volume_option) + USAGE_ERROR ((0, 0, _("Cannot verify multi-volume archives"))); + if (use_compress_program_option) + USAGE_ERROR ((0, 0, _("Cannot verify compressed archives"))); } + if (use_compress_program_option) + { + if (multi_volume_option) + USAGE_ERROR ((0, 0, _("Cannot use multi-volume compressed archives"))); + if (subcommand_option == UPDATE_SUBCOMMAND + || subcommand_option == APPEND_SUBCOMMAND + || subcommand_option == DELETE_SUBCOMMAND) + USAGE_ERROR ((0, 0, _("Cannot update compressed archives"))); + if (subcommand_option == CAT_SUBCOMMAND) + USAGE_ERROR ((0, 0, _("Cannot concatenate compressed archives"))); + } + + /* It is no harm to use --pax-option on non-pax archives in archive + reading mode. It may even be useful, since it allows to override + file attributes from tar headers. Therefore I allow such usage. + --gray */ + if (args.pax_option + && archive_format != POSIX_FORMAT + && (subcommand_option != EXTRACT_SUBCOMMAND + || subcommand_option != DIFF_SUBCOMMAND + || subcommand_option != LIST_SUBCOMMAND)) + USAGE_ERROR ((0, 0, _("--pax-option can be used only on POSIX archives"))); + /* If ready to unlink hierarchies, so we are for simpler files. */ if (recursive_unlink_option) old_files_option = UNLINK_FIRST_OLD_FILES; + + if (test_label_option) + { + /* --test-label is silent if the user has specified the label name to + compare against. */ + if (args.input_files == 0) + verbose_option++; + } + else if (utc_option) + verbose_option = 2; + /* Forbid using -c with no input files whatsoever. Check that `-f -', explicit or implied, is used correctly. */ switch (subcommand_option) { case CREATE_SUBCOMMAND: - if (input_files == 0 && !files_from_option) + if (args.input_files == 0 && !files_from_option) USAGE_ERROR ((0, 0, _("Cowardly refusing to create an empty archive"))); break; @@ -1248,12 +1968,27 @@ see the file named COPYING for details.")); /* Prepare for generating backup names. */ - if (backup_suffix_string) - simple_backup_suffix = xstrdup (backup_suffix_string); + if (args.backup_suffix_string) + simple_backup_suffix = xstrdup (args.backup_suffix_string); if (backup_option) - backup_type = xget_version ("--backup", version_control_string); + { + backup_type = xget_version ("--backup", args.version_control_string); + /* No backup is needed either if explicitely disabled or if + the extracted files are not being written to disk. */ + if (backup_type == no_backups || EXTRACT_OVER_PIPE) + backup_option = false; + } + + if (verbose_option && args.textual_date_option) + { + char const *treated_as = tartime (newer_mtime_option, true); + if (strcmp (args.textual_date_option, treated_as) != 0) + WARN ((0, 0, _("Treating date `%s' as %s"), + args.textual_date_option, treated_as)); + } } + /* Tar proper. */ @@ -1261,18 +1996,19 @@ see the file named COPYING for details.")); int main (int argc, char **argv) { -#if HAVE_CLOCK_GETTIME - if (clock_gettime (CLOCK_REALTIME, &start_timespec) != 0) -#endif - start_time = time (0); + set_start_time (); program_name = argv[0]; + setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); exit_status = TAREXIT_SUCCESS; filename_terminator = '\n'; - set_quoting_style (0, escape_quoting_style); + set_quoting_style (0, DEFAULT_QUOTING_STYLE); + + /* Make sure we have first three descriptors available */ + stdopen (); /* Pre-allocate a few structures. */ @@ -1281,6 +2017,8 @@ main (int argc, char **argv) xmalloc (sizeof (const char *) * allocated_archive_names); archive_names = 0; + obstack_init (&argv_stk); + #ifdef SIGCHLD /* System V fork+wait does not work if SIGCHLD is ignored. */ signal (SIGCHLD, SIG_DFL); @@ -1291,7 +2029,7 @@ main (int argc, char **argv) /* Decode options. */ decode_options (argc, argv); - name_init (argc, argv); + name_init (); /* Main command execution. */ @@ -1316,8 +2054,6 @@ main (int argc, char **argv) case CREATE_SUBCOMMAND: create_archive (); - name_close (); - if (totals_option) print_total_written (); break; @@ -1325,7 +2061,11 @@ main (int argc, char **argv) case EXTRACT_SUBCOMMAND: extr_init (); read_and (extract_archive); + + /* FIXME: should extract_finish () even if an ordinary signal is + received. */ extract_finish (); + break; case LIST_SUBCOMMAND: @@ -1338,6 +2078,9 @@ main (int argc, char **argv) break; } + if (check_links_option) + check_links (); + if (volno_file_option) closeout_volume_number (); @@ -1346,9 +2089,44 @@ main (int argc, char **argv) free (archive_name_array); name_term (); - if (stdlis == stdout && (ferror (stdout) || fclose (stdout) != 0)) + if (stdlis != stderr && (ferror (stdlis) || fclose (stdlis) != 0)) FATAL_ERROR ((0, 0, _("Error in writing to standard output"))); if (exit_status == TAREXIT_FAILURE) error (0, 0, _("Error exit delayed from previous errors")); - exit (exit_status); + if (ferror (stderr) || fclose (stderr) != 0) + exit_status = TAREXIT_FAILURE; + return exit_status; +} + +void +tar_stat_init (struct tar_stat_info *st) +{ + memset (st, 0, sizeof (*st)); +} + +void +tar_stat_destroy (struct tar_stat_info *st) +{ + free (st->orig_file_name); + free (st->file_name); + free (st->link_name); + free (st->uname); + free (st->gname); + free (st->sparse_map); + free (st->dumpdir); + memset (st, 0, sizeof (*st)); +} + +/* Format mask for all available formats that support nanosecond + timestamp resolution. */ +#define NS_PRECISION_FORMAT_MASK FORMAT_MASK (POSIX_FORMAT) + +/* Same as timespec_cmp, but ignore nanoseconds if current archive + format does not provide sufficient resolution. */ +int +tar_timespec_cmp (struct timespec a, struct timespec b) +{ + if (!(FORMAT_MASK (current_format) & NS_PRECISION_FORMAT_MASK)) + a.tv_nsec = b.tv_nsec = 0; + return timespec_cmp (a, b); }