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")));
+}
+
+
\f
/* Options. */
NO_WILDCARDS_MATCH_SLASH_OPTION,
NULL_OPTION,
NUMERIC_OWNER_OPTION,
+ OCCURRENCE_OPTION,
OVERWRITE_OPTION,
OWNER_OPTION,
POSIX_OPTION,
{"no-same-owner", no_argument, &same_owner_option, -1},
{"no-same-permissions", no_argument, &same_permissions_option, -1},
{"numeric-owner", no_argument, 0, NUMERIC_OWNER_OPTION},
+ {"occurrence", optional_argument, 0, OCCURRENCE_OPTION},
{"old-archive", no_argument, 0, 'o'},
{"one-file-system", no_argument, 0, 'l'},
{"overwrite", no_argument, 0, OVERWRITE_OPTION},
-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"),
+ --ignore-failed-read do not exit with nonzero on unreadable files\n\
+ --occurrence[=NUM] process only the NUMth occurrence of each file in\n\
+ the archive. This option is valid only in\n\
+ conjunction with one of the subcommands --delete,\n\
+ --diff, --extract or --list and when a list of\n\
+ files is given either on the command line or\n\
+ via -T option.\n\
+ NUM defaults to 1.\n"),
stdout);
fputs (_("\
\n\
numeric_owner_option = true;
break;
+ case OCCURRENCE_OPTION:
+ if (!optarg)
+ occurrence_option = 1;
+ else
+ {
+ uintmax_t u;
+ if (xstrtoumax (optarg, 0, 10, &u, "") == LONGINT_OK)
+ occurrence_option = u;
+ else
+ FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (optarg),
+ _("Invalid number")));
+ }
+ break;
+
case OVERWRITE_OPTION:
old_files_option = OVERWRITE_OLD_FILES;
break;
USAGE_ERROR ((0, 0,
_("GNU features wanted on incompatible archive format")));
+ if (volume_label_option && subcommand_option == CREATE_SUBCOMMAND)
+ assert_format (FORMAT_MASK (OLDGNU_FORMAT)
+ | FORMAT_MASK (GNU_FORMAT));
+
+ if (incremental_option
+ || multi_volume_option
+ || sparse_option)
+ assert_format (FORMAT_MASK (OLDGNU_FORMAT)
+ | FORMAT_MASK (GNU_FORMAT));
+
+ if (occurrence_option)
+ {
+ if (!input_files && !files_from_option)
+ USAGE_ERROR ((0, 0,
+ _("--occurrence is meaningless without 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 (archive_names == 0)
{
/* If no archive file name given, try TAPE from the environment, or
textual_date_option, treated_as));
}
}
+
\f
/* Tar proper. */