e5572b4b7c
(as specified by Linux Standards Base, GNU tar, and 4.4BSD documentation)
569 lines
16 KiB
C
569 lines
16 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "bsdtar_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <archive.h>
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#include <archive_entry.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#ifdef HAVE_GETOPT_LONG
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#include <getopt.h>
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#endif
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#include <locale.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "bsdtar.h"
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static void long_help(struct bsdtar *);
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static void only_mode(struct bsdtar *, char mode, const char *opt,
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const char *valid);
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static char ** rewrite_argv(struct bsdtar *,
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int *argc, char ** src_argv,
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const char *optstring);
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const char *tar_opts = "Bb:C:cF:f:HhjkLlmnOoPprtT:UuvwXxyZz";
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#ifdef HAVE_GETOPT_LONG
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/*
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* These long options are deliberately not documented. They are
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* provided only to make life easier for people using GNU tar. The
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* only long options documented in the manual page are the ones with
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* no corresponding short option (currently, --exclude, --nodump, and
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* --fast-read).
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*
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* XXX TODO: Provide short options for --exclude, --nodump and --fast-read
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* so that bsdtar is usable on systems that do not have (or do not want
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* to use) getopt_long().
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*/
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#define OPTION_EXCLUDE 1
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#define OPTION_FAST_READ 2
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#define OPTION_NODUMP 3
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#define OPTION_HELP 4
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const struct option tar_longopts[] = {
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{ "absolute-paths", no_argument, NULL, 'P' },
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{ "append", no_argument, NULL, 'r' },
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{ "block-size", required_argument, NULL, 'b' },
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{ "bunzip2", no_argument, NULL, 'j' },
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{ "bzip", no_argument, NULL, 'j' },
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{ "bzip2", no_argument, NULL, 'j' },
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{ "cd", required_argument, NULL, 'C' },
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{ "confirmation", no_argument, NULL, 'w' },
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{ "create", no_argument, NULL, 'c' },
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{ "dereference", no_argument, NULL, 'H' },
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{ "directory", required_argument, NULL, 'C' },
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{ "exclude", required_argument, NULL, OPTION_EXCLUDE },
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{ "extract", no_argument, NULL, 'x' },
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{ "fast-read", no_argument, NULL, OPTION_FAST_READ },
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{ "file", required_argument, NULL, 'f' },
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{ "format", required_argument, NULL, 'F' },
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{ "gunzip", no_argument, NULL, 'z' },
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{ "gzip", no_argument, NULL, 'z' },
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{ "help", no_argument, NULL, OPTION_HELP },
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{ "interactive", no_argument, NULL, 'w' },
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{ "keep-old-files", no_argument, NULL, 'k' },
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{ "list", no_argument, NULL, 't' },
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{ "modification-time", no_argument, NULL, 'm' },
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{ "nodump", no_argument, NULL, OPTION_NODUMP },
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{ "norecurse", no_argument, NULL, 'n' },
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{ "no-same-owner", no_argument, NULL, 'o' },
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{ "preserve-permissions", no_argument, NULL, 'p' },
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{ "read-full-blocks", no_argument, NULL, 'B' },
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{ "same-permissions", no_argument, NULL, 'p' },
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{ "to-stdout", no_argument, NULL, 'O' },
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{ "unlink", no_argument, NULL, 'U' },
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{ "unlink-first", no_argument, NULL, 'U' },
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{ "update", no_argument, NULL, 'u' },
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{ "verbose", no_argument, NULL, 'v' },
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{ NULL, 0, NULL, 0 }
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};
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#endif
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int
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main(int argc, char **argv)
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{
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struct bsdtar *bsdtar, bsdtar_storage;
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struct passwd *pwent;
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int opt;
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char mode;
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char buff[16];
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/*
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* Use a pointer for consistency, but stack-allocated storage
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* for ease of cleanup.
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*/
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bsdtar = &bsdtar_storage;
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memset(bsdtar, 0, sizeof(*bsdtar));
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bsdtar->fd = -1; /* Mark as "unused" */
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if (setlocale(LC_ALL, "") == NULL)
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bsdtar_warnc(bsdtar, 0, "Failed to set default locale");
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mode = '\0';
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/* Look up uid/uname of current user for future reference */
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bsdtar->user_uid = geteuid();
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bsdtar->user_uname = NULL;
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if ((pwent = getpwuid(bsdtar->user_uid))) {
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bsdtar->user_uname = (char *)malloc(strlen(pwent->pw_name)+1);
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if (bsdtar->user_uname)
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strcpy(bsdtar->user_uname, pwent->pw_name);
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}
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/* Default: open tape drive. */
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bsdtar->filename = getenv("TAPE");
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if (bsdtar->filename == NULL)
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bsdtar->filename = _PATH_DEFTAPE;
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bsdtar->bytes_per_block = 10240;
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/* Default: preserve mod time on extract */
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bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
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if (bsdtar->user_uid == 0)
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bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
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bsdtar->progname = strrchr(*argv, '/');
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if (bsdtar->progname != NULL)
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bsdtar->progname++;
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else
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bsdtar->progname = *argv;
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/* Rewrite traditional-style tar arguments, if used. */
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argv = rewrite_argv(bsdtar, &argc, argv, tar_opts);
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bsdtar->argv = argv;
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bsdtar->argc = argc;
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/* Process all remaining arguments now. */
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#ifdef HAVE_GETOPT_LONG
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while ((opt = getopt_long(bsdtar->argc, bsdtar->argv,
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tar_opts, tar_longopts, NULL)) != -1) {
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#else
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while ((opt = getopt(bsdtar->argc, bsdtar->argv, tar_opts)) != -1) {
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#endif
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switch (opt) {
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case 'B': /* GNU tar */
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/*
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* bsdtar is stream-based internally, so this
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* option has no effect. Just ignore it.
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*/
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break;
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case 'b': /* SUSv2 */
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bsdtar->bytes_per_block = 512 * atoi(optarg);
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break;
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case 'C': /* GNU tar */
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/* XXX How should multiple -C options be handled? */
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bsdtar->start_dir = optarg;
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break;
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case 'c': /* SUSv2 */
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if (mode != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c",
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opt, mode);
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mode = opt;
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break;
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#ifdef HAVE_GETOPT_LONG
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case OPTION_EXCLUDE: /* GNU tar */
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exclude(bsdtar, optarg);
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break;
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#endif
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case 'F':
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bsdtar->create_format = optarg;
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break;
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case 'f': /* SUSv2 */
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bsdtar->filename = optarg;
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if (strcmp(bsdtar->filename, "-") == 0)
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bsdtar->filename = NULL;
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break;
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#ifdef HAVE_GETOPT_LONG
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case OPTION_FAST_READ: /* GNU tar */
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bsdtar->option_fast_read = 1;
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break;
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#endif
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case 'H': /* BSD convention */
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bsdtar->symlink_mode = 'H';
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break;
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case 'h': /* Linux Standards Base, gtar; synonym for -L */
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bsdtar->symlink_mode = 'L';
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break;
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#ifdef HAVE_GETOPT_LONG
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case OPTION_HELP:
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long_help(bsdtar);
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break;
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#endif
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case 'j': /* GNU tar */
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if (bsdtar->create_compression != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c", opt,
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bsdtar->create_compression);
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bsdtar->create_compression = opt;
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break;
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case 'k': /* GNU tar */
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bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
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break;
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case 'L': /* BSD convention */
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bsdtar->symlink_mode = 'L';
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break;
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case 'l': /* SUSv2 */
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bsdtar->option_warn_links = 1;
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break;
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case 'm': /* SUSv2 */
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bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
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break;
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case 'n': /* GNU tar */
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bsdtar->option_no_subdirs = 1;
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break;
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#ifdef HAVE_GETOPT_LONG
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case OPTION_NODUMP: /* star */
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bsdtar->option_honor_nodump = 1;
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break;
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#endif
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case 'O': /* GNU tar */
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bsdtar->option_stdout = 1;
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break;
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case 'o': /* SUSv2 */
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bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
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break;
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#if 0
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/*
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* The common BSD -P option is not necessary, since
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* our default is to archive symlinks, not follow
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* them. This is convenient, as -P conflicts with GNU
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* tar anyway.
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*/
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case 'P': /* BSD convention */
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/* Default behavior, no option necessary. */
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break;
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#endif
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case 'P': /* GNU tar */
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bsdtar->option_absolute_paths = 1;
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break;
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case 'p': /* GNU tar, star */
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umask(0);
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bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
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break;
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case 'r': /* SUSv2 */
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if (mode != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c",
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opt, mode);
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mode = opt;
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break;
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case 't': /* SUSv2 */
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if (mode != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c",
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opt, mode);
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mode = opt;
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bsdtar->verbose++;
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break;
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case 'T': /* GNU tar */
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bsdtar->names_from_file = optarg;
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break;
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case 'U': /* GNU tar */
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bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
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bsdtar->option_unlink_first = 1;
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break;
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case 'u': /* SUSv2 */
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if (mode != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c",
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opt, mode);
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mode = opt;
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break;
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case 'v': /* SUSv2 */
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bsdtar->verbose++;
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break;
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case 'w': /* SUSv2 */
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bsdtar->option_interactive = 1;
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break;
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case 'X': /* -l in GNU tar */
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bsdtar->option_dont_traverse_mounts = 1;
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break;
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case 'x': /* SUSv2 */
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if (mode != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c",
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opt, mode);
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mode = opt;
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break;
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case 'y': /* FreeBSD version of GNU tar */
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if (bsdtar->create_compression != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c", opt,
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bsdtar->create_compression);
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bsdtar->create_compression = opt;
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break;
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case 'Z': /* GNU tar */
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if (bsdtar->create_compression != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c", opt,
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bsdtar->create_compression);
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bsdtar->create_compression = opt;
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break;
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case 'z': /* GNU tar, star */
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if (bsdtar->create_compression != '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Can't specify both -%c and -%c", opt,
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bsdtar->create_compression);
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bsdtar->create_compression = opt;
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break;
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default:
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usage(bsdtar);
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}
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}
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/*
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* Sanity-check options.
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*/
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if (mode == '\0')
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bsdtar_errc(bsdtar, 1, 0,
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"Must specify one of -c, -r, -t, -u, -x");
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/* Check boolean options only permitted in certain modes. */
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if (bsdtar->option_absolute_paths)
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only_mode(bsdtar, mode, "-P", "xcru");
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if (bsdtar->option_dont_traverse_mounts)
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only_mode(bsdtar, mode, "-X", "cru");
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if (bsdtar->option_fast_read)
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only_mode(bsdtar, mode, "--fast-read", "xt");
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if (bsdtar->option_honor_nodump)
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only_mode(bsdtar, mode, "--nodump", "cru");
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if (bsdtar->option_no_subdirs)
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only_mode(bsdtar, mode, "-n", "cru");
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if (bsdtar->option_stdout)
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only_mode(bsdtar, mode, "-O", "x");
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if (bsdtar->option_warn_links)
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only_mode(bsdtar, mode, "-l", "cr");
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/* Check other parameters only permitted in certain modes. */
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if (bsdtar->create_compression == 'Z' && mode == 'c') {
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bsdtar_warnc(bsdtar, 0, ".Z compression not supported");
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usage(bsdtar);
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}
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if (bsdtar->create_compression != '\0') {
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strcpy(buff, "-?");
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buff[1] = bsdtar->create_compression;
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only_mode(bsdtar, mode, buff, "cxt");
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}
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if (bsdtar->create_format != NULL)
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only_mode(bsdtar, mode, "-F", "c");
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if (bsdtar->names_from_file != NULL)
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only_mode(bsdtar, mode, "-T", "cru");
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if (bsdtar->symlink_mode != '\0') {
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strcpy(buff, "-X");
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buff[1] = bsdtar->symlink_mode;
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only_mode(bsdtar, mode, buff, "cru");
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}
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bsdtar->argc -= optind;
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bsdtar->argv += optind;
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switch(mode) {
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case 'c':
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tar_mode_c(bsdtar);
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break;
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case 'r':
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tar_mode_r(bsdtar);
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break;
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case 't':
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tar_mode_t(bsdtar);
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break;
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case 'u':
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tar_mode_u(bsdtar);
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break;
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case 'x':
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tar_mode_x(bsdtar);
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break;
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}
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if (bsdtar->user_uname != NULL)
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free(bsdtar->user_uname);
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cleanup_exclusions(bsdtar);
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return (bsdtar->return_value);
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}
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/*
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* Verify that the mode is correct.
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*/
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static void
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only_mode(struct bsdtar *bsdtar, char mode,
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const char *opt, const char *valid_modes)
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{
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if (strchr(valid_modes, mode) == NULL)
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bsdtar_errc(bsdtar, 1, 0,
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"Option %s is not permitted in mode -%c",
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opt, mode);
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}
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|
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/*-
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* Convert traditional tar arguments into new-style.
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* For example,
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* tar tvfb file.tar 32 --exclude FOO
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* must be converted to
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* tar -t -v -f file.tar -b 32 --exclude FOO
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*
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* This requires building a new argv array. The initial bundled word
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* gets expanded into a new string that looks like "-t\0-v\0-f\0-b\0".
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* The new argv array has pointers into this string intermingled with
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* pointers to the existing arguments. Arguments are moved to
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* immediately follow their options.
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*
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* The optstring argument here is the same one passed to getopt(3).
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* It is used to determine which option letters have trailing arguments.
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*/
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char **
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rewrite_argv(struct bsdtar *bsdtar, int *argc, char ** src_argv,
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const char *optstring)
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{
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char **new_argv, **dest_argv;
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const char *p;
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char *src, *dest;
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if (src_argv[1] == NULL || src_argv[1][0] == '-')
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return (src_argv);
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*argc += strlen(src_argv[1]) - 1;
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new_argv = malloc((*argc + 1) * sizeof(new_argv[0]));
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if (new_argv == NULL)
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bsdtar_errc(bsdtar, 1, errno, "No Memory");
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dest_argv = new_argv;
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*dest_argv++ = *src_argv++;
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dest = malloc(strlen(*src_argv) * 3);
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if (dest == NULL)
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bsdtar_errc(bsdtar, 1, errno, "No memory");
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for (src = *src_argv++; *src != '\0'; src++) {
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*dest_argv++ = dest;
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*dest++ = '-';
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*dest++ = *src;
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*dest++ = '\0';
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/* If option takes an argument, insert that into the list. */
|
|
for (p = optstring; p != NULL && *p != '\0'; p++) {
|
|
if (*p != *src)
|
|
continue;
|
|
if (p[1] != ':') /* No arg required, done. */
|
|
break;
|
|
if (*src_argv == NULL) /* No arg available? Error. */
|
|
bsdtar_errc(bsdtar, 1, 0,
|
|
"Option %c requires an argument",
|
|
*src);
|
|
*dest_argv++ = *src_argv++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Copy remaining arguments, including trailing NULL. */
|
|
while ((*dest_argv++ = *src_argv++) != NULL)
|
|
;
|
|
|
|
return (new_argv);
|
|
}
|
|
|
|
void
|
|
usage(struct bsdtar *bsdtar)
|
|
{
|
|
const char *p;
|
|
|
|
p = bsdtar->progname;
|
|
|
|
printf("Basic Usage:\n");
|
|
printf(" List: %s -tf [archive-filename]\n", p);
|
|
printf(" Extract: %s -xf [archive-filename]\n", p);
|
|
printf(" Create: %s -cf [archive-filename] [filenames...]\n", p);
|
|
printf(" Help: %s -h\n", p);
|
|
exit(1);
|
|
}
|
|
|
|
static const char *long_help_msg[] = {
|
|
"First option must be a mode specifier:\n",
|
|
" -c Create -r Add/Replace -t List -u Update -x Extract\n",
|
|
"Common Options:\n",
|
|
" -b # Use # 512-byte records per I/O block\n",
|
|
" -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n",
|
|
" -v Verbose\n",
|
|
" -w Interactive\n",
|
|
"Create: %p -c [options] [<file> | <dir> | @<archive> | C=<dir> ]\n",
|
|
" <file>, <dir> add these items to archive\n",
|
|
" -z, -j Compress archive with gzip/bzip2\n",
|
|
" -F {ustar|pax|cpio|shar} Select archive format\n",
|
|
" --exclude <pattern> Skip files that match pattern\n",
|
|
" C=<dir> Change to <dir> before processing remaining files\n",
|
|
" @<archive> Add entries from <archive> to output\n",
|
|
"List: %p -t [options] [<patterns>]\n",
|
|
" <patterns> If specified, list only entries that match\n",
|
|
"Extract: %p -x [options] [<patterns>]\n",
|
|
" <patterns> If specified, extract only entries that match\n",
|
|
" -k Keep (don't overwrite) existing files\n",
|
|
" -m Don't restore modification times\n",
|
|
" -O Write entries to stdout, don't restore to disk\n",
|
|
" -p Restore permissions (including ACLs, owner, file flags)\n",
|
|
NULL
|
|
};
|
|
|
|
|
|
static void
|
|
long_help(struct bsdtar *bsdtar)
|
|
{
|
|
const char *prog;
|
|
const char *p;
|
|
const char **msg;
|
|
|
|
prog = bsdtar->progname;
|
|
|
|
printf("%s: manipulate archive files\n", prog);
|
|
|
|
for (msg = long_help_msg; *msg != NULL; msg++) {
|
|
for (p = *msg; p != NULL; p++) {
|
|
if (*p == '\0')
|
|
break;
|
|
else if (*p == '%') {
|
|
if (p[1] == 'p') {
|
|
fputs(prog, stdout);
|
|
p++;
|
|
} else
|
|
putchar('%');
|
|
} else
|
|
putchar(*p);
|
|
}
|
|
}
|
|
}
|