X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Ftar.c;h=6fd117c636702f564511be0d3c7c4876b849efdb;hb=8da503cad6e883b30c05749149084d24319063b4;hp=583edc90ea6f549e883186d097f10c496a97bd8e;hpb=cef4d5e83830763a1acd5d603fb62a356df27299;p=chaz%2Ftar diff --git a/src/tar.c b/src/tar.c index 583edc9..6fd117c 100644 --- a/src/tar.c +++ b/src/tar.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #if ! defined SIGCHLD && defined SIGCLD @@ -73,7 +74,7 @@ static const char *stdin_used_by; /* Doesn't return if stdin already requested. */ -void +static void request_stdin (const char *option) { if (stdin_used_by) @@ -213,21 +214,28 @@ subcommand_string (enum subcommand c) case UPDATE_SUBCOMMAND: return "-u"; - default: - abort (); + case TEST_LABEL_SUBCOMMAND: + return "--test-label"; } + abort (); } -void -tar_list_quoting_styles (argp_fmtstream_t fs, char *prefix) +static void +tar_list_quoting_styles (struct obstack *stk, char const *prefix) { int i; + size_t prefixlen = strlen (prefix); for (i = 0; quoting_style_args[i]; i++) - argp_fmtstream_printf (fs, "%s%s\n", prefix, quoting_style_args[i]); + { + obstack_grow (stk, prefix, prefixlen); + obstack_grow (stk, quoting_style_args[i], + strlen (quoting_style_args[i])); + obstack_1grow (stk, '\n'); + } } -void +static void tar_set_quoting_style (char *arg) { int i; @@ -266,14 +274,15 @@ enum EXCLUDE_TAG_ALL_OPTION, EXCLUDE_VCS_OPTION, FORCE_LOCAL_OPTION, + FULL_TIME_OPTION, GROUP_OPTION, - HANG_OPTION, IGNORE_CASE_OPTION, IGNORE_COMMAND_ERROR_OPTION, IGNORE_FAILED_READ_OPTION, INDEX_FILE_OPTION, KEEP_NEWER_FILES_OPTION, LEVEL_OPTION, + LZIP_OPTION, LZMA_OPTION, LZOP_OPTION, MODE_OPTION, @@ -327,11 +336,9 @@ enum TO_COMMAND_OPTION, TRANSFORM_OPTION, UNQUOTE_OPTION, - USAGE_OPTION, UTC_OPTION, - VERSION_OPTION, VOLNO_FILE_OPTION, - WARNING_OPTION, + WARNING_OPTION, WILDCARDS_MATCH_SLASH_OPTION, WILDCARDS_OPTION }; @@ -610,25 +617,21 @@ static struct argp_option options[] = { {"no-auto-compress", NO_AUTO_COMPRESS_OPTION, 0, 0, N_("do not use archive suffix to determine the compression program"), GRID+1 }, - {"bzip2", 'j', 0, 0, - N_("filter the archive through bzip2"), GRID+1 }, - {"gzip", 'z', 0, 0, - N_("filter the archive through gzip"), GRID+1 }, + {"use-compress-program", 'I', N_("PROG"), 0, + N_("filter through PROG (must accept -d)"), GRID+1 }, + /* Note: docstrings for the options below are generated by tar_help_filter */ + {"bzip2", 'j', 0, 0, NULL, GRID+1 }, + {"gzip", 'z', 0, 0, NULL, GRID+1 }, {"gunzip", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, {"ungzip", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, - {"compress", 'Z', 0, 0, - N_("filter the archive through compress"), GRID+1 }, + {"compress", 'Z', 0, 0, NULL, GRID+1 }, {"uncompress", 0, 0, OPTION_ALIAS, NULL, GRID+1 }, - {"lzma", LZMA_OPTION, 0, 0, - N_("filter the archive through lzma"), GRID+1 }, - {"lzop", LZOP_OPTION, 0, 0, - N_("filter the archive through lzop"), GRID+8 }, - {"xz", 'J', 0, 0, - N_("filter the archive through xz"), GRID+8 }, - {"use-compress-program", 'I', N_("PROG"), 0, - N_("filter through PROG (must accept -d)"), GRID+1 }, + {"lzip", LZIP_OPTION, 0, 0, NULL, GRID+1 }, + {"lzma", LZMA_OPTION, 0, 0, NULL, GRID+1 }, + {"lzop", LZOP_OPTION, 0, 0, NULL, GRID+1 }, + {"xz", 'J', 0, 0, NULL, GRID+1 }, #undef GRID - + #define GRID 100 {NULL, 0, NULL, 0, N_("Local file selection:"), GRID }, @@ -750,7 +753,9 @@ static struct argp_option options[] = { "Allowed signals are: SIGHUP, SIGQUIT, SIGINT, SIGUSR1 and SIGUSR2; " "the names without SIG prefix are also accepted"), GRID+1 }, {"utc", UTC_OPTION, 0, 0, - N_("print file modification dates in UTC"), GRID+1 }, + N_("print file modification times in UTC"), GRID+1 }, + {"full-time", FULL_TIME_OPTION, 0, 0, + N_("print file time to its full resolution"), GRID+1 }, {"index-file", INDEX_FILE_OPTION, N_("FILE"), 0, N_("send verbose output to FILE"), GRID+1 }, {"block-number", 'R', 0, 0, @@ -788,14 +793,6 @@ static struct argp_option options[] = { {"restrict", RESTRICT_OPTION, 0, 0, N_("disable 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} @@ -894,7 +891,7 @@ static char const * const backup_file_table[] = { NULL }; -void +static void add_exclude_array (char const * const * fv) { int i; @@ -904,46 +901,33 @@ add_exclude_array (char const * const * fv) } +static char * +format_default_settings (void) +{ + return xasprintf ( + "--format=%s -f%s -b%d --quoting-style=%s --rmt-command=%s" #ifdef REMOTE_SHELL -# define DECL_SHOW_DEFAULT_SETTINGS(stream, printer) \ -{ \ - printer (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); \ - printer (stream, " --rsh-command=%s", REMOTE_SHELL); \ - printer (stream, "\n"); \ -} -#else -# define DECL_SHOW_DEFAULT_SETTINGS(stream, printer) \ -{ \ - printer (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); \ - printer (stream, "\n"); \ -} + " --rsh-command=%s" #endif + , + archive_format_string (DEFAULT_ARCHIVE_FORMAT), + DEFAULT_ARCHIVE, DEFAULT_BLOCKING, + quoting_style_args[DEFAULT_QUOTING_STYLE], + DEFAULT_RMT_COMMAND +#ifdef REMOTE_SHELL + , REMOTE_SHELL +#endif + ); +} -static void -show_default_settings (FILE *fp) - DECL_SHOW_DEFAULT_SETTINGS(fp, fprintf) - -static void -show_default_settings_fs (argp_fmtstream_t fs) - DECL_SHOW_DEFAULT_SETTINGS(fs, argp_fmtstream_printf) - + static void set_subcommand_option (enum subcommand subcommand) { if (subcommand_option != UNKNOWN_SUBCOMMAND && subcommand_option != subcommand) USAGE_ERROR ((0, 0, - _("You may not specify more than one `-Acdtrux' option"))); + _("You may not specify more than one `-Acdtrux' or `--test-label' option"))); subcommand_option = subcommand; } @@ -982,14 +966,14 @@ stat_on_signal (int signo) #endif } -void +static void set_stat_signal (const char *name) { static struct sigtab { - char *name; + char const *name; int signo; - } sigtab[] = { + } const sigtab[] = { { "SIGUSR1", SIGUSR1 }, { "USR1", SIGUSR1 }, { "SIGUSR2", SIGUSR2 }, @@ -1001,7 +985,7 @@ set_stat_signal (const char *name) { "SIGQUIT", SIGQUIT }, { "QUIT", SIGQUIT } }; - struct sigtab *p; + struct sigtab const *p; for (p = sigtab; p < sigtab + sizeof (sigtab) / sizeof (sigtab[0]); p++) if (strcmp (p->name, name) == 0) @@ -1016,12 +1000,12 @@ set_stat_signal (const char *name) struct textual_date { struct textual_date *next; - struct timespec *ts; + struct timespec ts; const char *option; - const char *date; + char *date; }; -static void +static int get_date_or_file (struct tar_args *args, const char *option, const char *str, struct timespec *ts) { @@ -1044,17 +1028,19 @@ get_date_or_file (struct tar_args *args, const char *option, WARN ((0, 0, _("Substituting %s for unknown date format %s"), tartime (*ts, false), quote (str))); ts->tv_nsec = 0; + return 1; } else { struct textual_date *p = xmalloc (sizeof (*p)); - p->ts = ts; + p->ts = *ts; p->option = option; - p->date = str; + p->date = xstrdup (str); p->next = args->textual_date; args->textual_date = p; } } + return 0; } static void @@ -1064,17 +1050,20 @@ report_textual_dates (struct tar_args *args) for (p = args->textual_date; p; ) { struct textual_date *next = p->next; - char const *treated_as = tartime (*p->ts, true); - if (strcmp (p->date, treated_as) != 0) - WARN ((0, 0, _("Option %s: Treating date `%s' as %s"), - p->option, p->date, treated_as)); + if (verbose_option) + { + char const *treated_as = tartime (p->ts, true); + if (strcmp (p->date, treated_as) != 0) + WARN ((0, 0, _("Option %s: Treating date `%s' as %s"), + p->option, p->date, treated_as)); + } + free (p->date); free (p); p = next; } } -static volatile int _argp_hang; /* Either NL or NUL, as decided by the --null option. */ static char filename_terminator; @@ -1178,7 +1167,7 @@ update_argv (const char *filename, struct argp_state *state) bool is_stdin = false; enum read_file_list_state read_state; int term = filename_terminator; - + if (!strcmp (filename, "-")) { is_stdin = true; @@ -1263,28 +1252,120 @@ update_argv (const char *filename, struct argp_state *state) } -static void -tar_help (struct argp_state *state) +static char * +tar_help_filter (int key, const char *text, void *input) +{ + struct obstack stk; + char *s; + + switch (key) + { + default: + s = (char*) text; + break; + + case 'j': + s = xasprintf (_("filter the archive through %s"), BZIP2_PROGRAM); + break; + + case 'z': + s = xasprintf (_("filter the archive through %s"), GZIP_PROGRAM); + break; + + case 'Z': + s = xasprintf (_("filter the archive through %s"), COMPRESS_PROGRAM); + break; + + case LZIP_OPTION: + s = xasprintf (_("filter the archive through %s"), LZIP_PROGRAM); + break; + + case LZMA_OPTION: + s = xasprintf (_("filter the archive through %s"), LZMA_PROGRAM); + break; + + case 'J': + s = xasprintf (_("filter the archive through %s"), XZ_PROGRAM); + break; + + case ARGP_KEY_HELP_EXTRA: + { + const char *tstr; + + obstack_init (&stk); + tstr = _("Valid arguments for the --quoting-style option are:"); + obstack_grow (&stk, tstr, strlen (tstr)); + obstack_grow (&stk, "\n\n", 2); + tar_list_quoting_styles (&stk, " "); + tstr = _("\n*This* tar defaults to:\n"); + obstack_grow (&stk, tstr, strlen (tstr)); + s = format_default_settings (); + obstack_grow (&stk, s, strlen (s)); + obstack_1grow (&stk, '\n'); + obstack_1grow (&stk, 0); + s = xstrdup (obstack_finish (&stk)); + obstack_free (&stk, NULL); + } + } + return s; +} + +static char * +expand_pax_option (struct tar_args *targs, const char *arg) { - argp_fmtstream_t fs; - state->flags |= ARGP_NO_EXIT; - argp_state_help (state, state->out_stream, - ARGP_HELP_STD_HELP & ~ARGP_HELP_BUG_ADDR); - /* FIXME: use struct uparams.rmargin (from argp-help.c) instead of 79 */ - fs = argp_make_fmtstream (state->out_stream, 0, 79, 0); - - argp_fmtstream_printf (fs, "\n%s\n\n", - _("Valid arguments for --quoting-style options are:")); - tar_list_quoting_styles (fs, " "); - - argp_fmtstream_puts (fs, _("\n*This* tar defaults to:\n")); - show_default_settings_fs (fs); - argp_fmtstream_putc (fs, '\n'); - argp_fmtstream_printf (fs, _("Report bugs to %s.\n"), - argp_program_bug_address); - argp_fmtstream_free (fs); + struct obstack stk; + char *res; + + obstack_init (&stk); + while (*arg) + { + size_t seglen = strcspn (arg, ","); + char *p = memchr (arg, '=', seglen); + if (p) + { + size_t len = p - arg + 1; + obstack_grow (&stk, arg, len); + len = seglen - len; + for (++p; *p && isspace ((unsigned char) *p); p++) + len--; + if (*p == '{' && p[len-1] == '}') + { + struct timespec ts; + char *tmp = xmalloc (len); + memcpy (tmp, p + 1, len-2); + tmp[len-2] = 0; + if (get_date_or_file (targs, "--pax-option", tmp, &ts) == 0) + { + char buf[UINTMAX_STRSIZE_BOUND], *s; + s = umaxtostr (ts.tv_sec, buf); + obstack_grow (&stk, s, strlen (s)); + } + else + obstack_grow (&stk, p, len); + free (tmp); + } + else + obstack_grow (&stk, p, len); + } + else + obstack_grow (&stk, arg, seglen); + + arg += seglen; + if (*arg) + { + obstack_1grow (&stk, *arg); + arg++; + } + } + obstack_1grow (&stk, 0); + res = xstrdup (obstack_finish (&stk)); + obstack_free (&stk, NULL); + return res; } + +#define TAR_SIZE_SUFFIXES "bBcGgkKMmPTtw" + static error_t parse_opt (int key, char *arg, struct argp_state *state) { @@ -1309,7 +1390,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case NO_AUTO_COMPRESS_OPTION: args->compress_autodetect = false; break; - + case 'b': { uintmax_t u; @@ -1362,6 +1443,10 @@ parse_opt (int key, char *arg, struct argp_state *state) multi_volume_option = true; break; + case FULL_TIME_OPTION: + full_time_option = true; + break; + case 'g': listed_incremental_option = arg; after_date_option = true; @@ -1383,7 +1468,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case HARD_DEREFERENCE_OPTION: hard_dereference_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 @@ -1393,13 +1478,13 @@ parse_opt (int key, char *arg, struct argp_state *state) break; case 'j': - set_use_compress_program_option ("bzip2"); + set_use_compress_program_option (BZIP2_PROGRAM); break; case 'J': - set_use_compress_program_option ("xz"); + set_use_compress_program_option (XZ_PROGRAM); break; - + case 'k': /* Don't replace existing files. */ old_files_option = KEEP_OLD_FILES; @@ -1423,10 +1508,15 @@ parse_opt (int key, char *arg, struct argp_state *state) case 'L': { uintmax_t u; - if (xstrtoumax (arg, 0, 10, &u, "") != LONGINT_OK) + char *p; + + if (xstrtoumax (arg, &p, 10, &u, TAR_SIZE_SUFFIXES) != LONGINT_OK) USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), _("Invalid tape length"))); - tape_length_option = 1024 * (tarlong) u; + if (p > arg && !strchr (TAR_SIZE_SUFFIXES, p[-1])) + tape_length_option = 1024 * (tarlong) u; + else + tape_length_option = (tarlong) u; multi_volume_option = true; } break; @@ -1439,15 +1529,19 @@ parse_opt (int key, char *arg, struct argp_state *state) USAGE_ERROR ((0, 0, _("Invalid incremental level value"))); } break; - + + case LZIP_OPTION: + set_use_compress_program_option (LZIP_PROGRAM); + break; + case LZMA_OPTION: - set_use_compress_program_option ("lzma"); + set_use_compress_program_option (LZMA_PROGRAM); break; - + case LZOP_OPTION: - set_use_compress_program_option ("lzop"); + set_use_compress_program_option (LZOP_PROGRAM); break; - + case 'm': touch_option = true; break; @@ -1471,7 +1565,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case NO_SEEK_OPTION: seek_option = 0; break; - + case 'N': after_date_option = true; /* Fall through. */ @@ -1481,7 +1575,7 @@ parse_opt (int key, char *arg, struct argp_state *state) USAGE_ERROR ((0, 0, _("More than one threshold date"))); get_date_or_file (args, key == NEWER_MTIME_OPTION ? "--newer-mtime" - : "--after-date", arg, &newer_mtime_option); + : "--after-date", arg, &newer_mtime_option); break; case 'o': @@ -1547,8 +1641,7 @@ parse_opt (int key, char *arg, struct argp_state *state) break; case TEST_LABEL_OPTION: - set_subcommand_option (LIST_SUBCOMMAND); - test_label_option = true; + set_subcommand_option (TEST_LABEL_SUBCOMMAND); break; case 'T': @@ -1603,11 +1696,11 @@ parse_opt (int key, char *arg, struct argp_state *state) break; case 'z': - set_use_compress_program_option ("gzip"); + set_use_compress_program_option (GZIP_PROGRAM); break; case 'Z': - set_use_compress_program_option ("compress"); + set_use_compress_program_option (COMPRESS_PROGRAM); break; case ANCHORED_OPTION: @@ -1629,11 +1722,11 @@ parse_opt (int key, char *arg, struct argp_state *state) case CHECK_DEVICE_OPTION: check_device_option = true; break; - + case NO_CHECK_DEVICE_OPTION: check_device_option = false; break; - + case CHECKPOINT_OPTION: if (arg) { @@ -1656,7 +1749,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case CHECKPOINT_ACTION_OPTION: checkpoint_compile_action (arg); break; - + case BACKUP_OPTION: backup_option = true; if (arg) @@ -1678,7 +1771,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case EXCLUDE_BACKUPS_OPTION: add_exclude_array (backup_file_table); break; - + case EXCLUDE_OPTION: add_exclude (excluded, arg, MAKE_EXCL_OPTIONS (args)); break; @@ -1713,7 +1806,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case EXCLUDE_VCS_OPTION: add_exclude_array (vcs_file_table); break; - + case FORCE_LOCAL_OPTION: force_local_option = true; break; @@ -1752,7 +1845,7 @@ parse_opt (int key, char *arg, struct argp_state *state) group_option = g; else FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), - _("%s: Invalid group"))); + _("Invalid group"))); } break; @@ -1852,8 +1945,12 @@ parse_opt (int key, char *arg, struct argp_state *state) break; case PAX_OPTION: - args->pax_option = true; - xheader_set_option (arg); + { + char *tmp = expand_pax_option (args, arg); + args->pax_option = true; + xheader_set_option (tmp); + free (tmp); + } break; case POSIX_OPTION: @@ -1871,7 +1968,8 @@ parse_opt (int key, char *arg, struct argp_state *state) case RECORD_SIZE_OPTION: { uintmax_t u; - if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK + + if (! (xstrtoumax (arg, NULL, 10, &u, TAR_SIZE_SUFFIXES) == LONGINT_OK && u == (size_t) u)) USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg), _("Invalid record size"))); @@ -1904,9 +2002,13 @@ parse_opt (int key, char *arg, struct argp_state *state) break; case SHOW_DEFAULTS_OPTION: - show_default_settings (stdout); - close_stdout (); - exit (0); + { + char *s = format_default_settings (); + printf ("%s\n", s); + close_stdout (); + free (s); + exit (0); + } case STRIP_COMPONENTS_OPTION: { @@ -1996,7 +2098,7 @@ parse_opt (int key, char *arg, struct argp_state *state) case WARNING_OPTION: set_warning_option (arg); break; - + case '0': case '1': case '2': @@ -2061,28 +2163,6 @@ parse_opt (int key, char *arg, struct argp_state *state) #endif /* not DEVICE_PREFIX */ - case '?': - tar_help (state); - close_stdout (); - exit (0); - - case USAGE_OPTION: - argp_state_help (state, state->out_stream, ARGP_HELP_USAGE); - close_stdout (); - exit (0); - - case VERSION_OPTION: - version_etc (state->out_stream, "tar", PACKAGE_NAME, VERSION, - "John Gilmore", "Jay Fenlason", (char *) NULL); - close_stdout (); - exit (0); - - case HANG_OPTION: - _argp_hang = atoi (arg ? arg : "3600"); - while (_argp_hang-- > 0) - sleep (1); - break; - default: return ARGP_ERR_UNKNOWN; } @@ -2095,7 +2175,7 @@ static struct argp argp = { N_("[FILE]..."), doc, NULL, - NULL, + tar_help_filter, NULL }; @@ -2123,12 +2203,20 @@ find_argp_option (struct argp_option *o, int letter) return NULL; } +static const char *tar_authors[] = { + "John Gilmore", + "Jay Fenlason", + NULL +}; + static void decode_options (int argc, char **argv) { int idx; struct tar_args args; + argp_version_setup ("tar", tar_authors); + /* Set some default option values. */ args.textual_date = NULL; args.wildcards = default_wildcards; @@ -2140,7 +2228,7 @@ decode_options (int argc, char **argv) args.version_control_string = 0; args.input_files = false; args.compress_autodetect = false; - + subcommand_option = UNKNOWN_SUBCOMMAND; archive_format = DEFAULT_FORMAT; blocking_factor = DEFAULT_BLOCKING; @@ -2161,7 +2249,7 @@ decode_options (int argc, char **argv) incremental_level = -1; seek_option = -1; - + /* Convert old-style tar call by exploding option element and rearranging options accordingly. */ @@ -2223,8 +2311,7 @@ decode_options (int argc, char **argv) prepend_default_options (getenv ("TAR_OPTIONS"), &argc, &argv); - if (argp_parse (&argp, argc, argv, ARGP_IN_ORDER|ARGP_NO_HELP, - &idx, &args)) + if (argp_parse (&argp, argc, argv, ARGP_IN_ORDER, &idx, &args)) exit (TAREXIT_FAILURE); @@ -2317,7 +2404,7 @@ decode_options (int argc, char **argv) if (incremental_level != -1 && !listed_incremental_option) WARN ((0, 0, _("--level is meaningless without --listed-incremental"))); - + if (volume_label_option) { if (archive_format == GNU_FORMAT || archive_format == OLDGNU_FORMAT) @@ -2378,8 +2465,20 @@ decode_options (int argc, char **argv) if (recursive_unlink_option) old_files_option = UNLINK_FIRST_OLD_FILES; - - if (test_label_option) + /* Flags for accessing files to be read from or copied into. POSIX says + O_NONBLOCK has unspecified effect on most types of files, but in + practice it never harms and sometimes helps. */ + { + int base_open_flags = + (O_BINARY | O_CLOEXEC | O_NOCTTY | O_NONBLOCK + | (dereference_option ? 0 : O_NOFOLLOW) + | (atime_preserve_option == system_atime_preserve ? O_NOATIME : 0)); + open_read_flags = O_RDONLY | base_open_flags; + open_searchdir_flags = O_SEARCH | O_DIRECTORY | base_open_flags; + } + fstatat_flags = dereference_option ? 0 : AT_SYMLINK_NOFOLLOW; + + if (subcommand_option == TEST_LABEL_SUBCOMMAND) { /* --test-label is silent if the user has specified the label name to compare against. */ @@ -2395,7 +2494,7 @@ decode_options (int argc, char **argv) if (same_order_option && listed_incremental_option) USAGE_ERROR ((0, 0, _("--preserve-order is not compatible with " "--listed-incremental"))); - + /* Forbid using -c with no input files whatsoever. Check that `-f -', explicit or implied, is used correctly. */ @@ -2407,13 +2506,14 @@ decode_options (int argc, char **argv) _("Cowardly refusing to create an empty archive"))); if (args.compress_autodetect && archive_names && strcmp (archive_name_array[0], "-")) - set_comression_program_by_suffix (archive_name_array[0], - use_compress_program_option); + set_compression_program_by_suffix (archive_name_array[0], + use_compress_program_option); break; case EXTRACT_SUBCOMMAND: case LIST_SUBCOMMAND: case DIFF_SUBCOMMAND: + case TEST_LABEL_SUBCOMMAND: for (archive_name_cursor = archive_name_array; archive_name_cursor < archive_name_array + archive_names; archive_name_cursor++) @@ -2462,9 +2562,8 @@ decode_options (int argc, char **argv) } checkpoint_finish_compile (); - - if (verbose_option) - report_textual_dates (&args); + + report_textual_dates (&args); } @@ -2475,7 +2574,7 @@ int main (int argc, char **argv) { set_start_time (); - program_name = argv[0]; + set_program_name (argv[0]); setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); @@ -2498,14 +2597,12 @@ main (int argc, char **argv) obstack_init (&argv_stk); - /* Ensure default behavior for some signals */ - signal (SIGPIPE, SIG_DFL); /* System V fork+wait does not work if SIGCHLD is ignored. */ signal (SIGCHLD, SIG_DFL); /* Try to disable the ability to unlink a directory. */ priv_set_remove_linkdir (); - + /* Decode options. */ decode_options (argc, argv); @@ -2521,7 +2618,7 @@ main (int argc, char **argv) { case UNKNOWN_SUBCOMMAND: USAGE_ERROR ((0, 0, - _("You must specify one of the `-Acdtrux' options"))); + _("You must specify one of the `-Acdtrux' or `--test-label' options"))); case CAT_SUBCOMMAND: case UPDATE_SUBCOMMAND: @@ -2555,6 +2652,9 @@ main (int argc, char **argv) diff_init (); read_and (diff_archive); break; + + case TEST_LABEL_SUBCOMMAND: + test_archive_label (); } if (totals_option) @@ -2577,7 +2677,7 @@ main (int argc, char **argv) if (stdlis == stdout) close_stdout (); else if (ferror (stderr) || fclose (stderr) != 0) - exit_status = TAREXIT_FAILURE; + set_exit_status (TAREXIT_FAILURE); return exit_status; } @@ -2588,9 +2688,31 @@ tar_stat_init (struct tar_stat_info *st) memset (st, 0, sizeof (*st)); } +/* Close the stream or file descriptor associated with ST, and remove + all traces of it from ST. Return true if successful, false (with a + diagnostic) otherwise. */ +bool +tar_stat_close (struct tar_stat_info *st) +{ + int status = (st->dirstream ? closedir (st->dirstream) + : 0 < st->fd ? close (st->fd) + : 0); + st->dirstream = 0; + st->fd = 0; + + if (status == 0) + return true; + else + { + close_diag (st->orig_file_name); + return false; + } +} + void tar_stat_destroy (struct tar_stat_info *st) { + tar_stat_close (st); free (st->orig_file_name); free (st->file_name); free (st->link_name); @@ -2615,3 +2737,13 @@ tar_timespec_cmp (struct timespec a, struct timespec b) a.tv_nsec = b.tv_nsec = 0; return timespec_cmp (a, b); } + +/* Set tar exit status to VAL, unless it is already indicating + a more serious condition. This relies on the fact that the + values of TAREXIT_ constants are ranged by severity. */ +void +set_exit_status (int val) +{ + if (val > exit_status) + exit_status = val; +}