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-rw-r--r--contrib/libarchive/tar/bsdtar.c757
1 files changed, 757 insertions, 0 deletions
diff --git a/contrib/libarchive/tar/bsdtar.c b/contrib/libarchive/tar/bsdtar.c
new file mode 100644
index 0000000..3b227bc
--- /dev/null
+++ b/contrib/libarchive/tar/bsdtar.c
@@ -0,0 +1,757 @@
+/*-
+ * Copyright (c) 2003-2008 Tim Kientzle
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "bsdtar_platform.h"
+__FBSDID("$FreeBSD: src/usr.bin/tar/bsdtar.c,v 1.93 2008/11/08 04:43:24 kientzle Exp $");
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_LANGINFO_H
+#include <langinfo.h>
+#endif
+#ifdef HAVE_LOCALE_H
+#include <locale.h>
+#endif
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_ZLIB_H
+#include <zlib.h>
+#endif
+
+#include "bsdtar.h"
+#include "err.h"
+
+/*
+ * Per POSIX.1-1988, tar defaults to reading/writing archives to/from
+ * the default tape device for the system. Pick something reasonable here.
+ */
+#ifdef __linux
+#define _PATH_DEFTAPE "/dev/st0"
+#endif
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#define _PATH_DEFTAPE "\\\\.\\tape0"
+#endif
+
+#ifndef _PATH_DEFTAPE
+#define _PATH_DEFTAPE "/dev/tape"
+#endif
+
+#ifdef __MINGW32__
+int _CRT_glob = 0; /* Disable broken CRT globbing. */
+#endif
+
+static struct bsdtar *_bsdtar;
+
+#if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
+static volatile int siginfo_occurred;
+
+static void
+siginfo_handler(int sig)
+{
+ (void)sig; /* UNUSED */
+ siginfo_occurred = 1;
+}
+
+int
+need_report(void)
+{
+ int r = siginfo_occurred;
+ siginfo_occurred = 0;
+ return (r);
+}
+#else
+int
+need_report(void)
+{
+ return (0);
+}
+#endif
+
+/* External function to parse a date/time string */
+time_t get_date(time_t, const char *);
+
+static void long_help(void);
+static void only_mode(struct bsdtar *, const char *opt,
+ const char *valid);
+static void set_mode(struct bsdtar *, char opt);
+static void version(void);
+
+/* A basic set of security flags to request from libarchive. */
+#define SECURITY \
+ (ARCHIVE_EXTRACT_SECURE_SYMLINKS \
+ | ARCHIVE_EXTRACT_SECURE_NODOTDOT)
+
+int
+main(int argc, char **argv)
+{
+ struct bsdtar *bsdtar, bsdtar_storage;
+ int opt, t;
+ char option_o;
+ char possible_help_request;
+ char buff[16];
+ time_t now;
+
+ /*
+ * Use a pointer for consistency, but stack-allocated storage
+ * for ease of cleanup.
+ */
+ _bsdtar = bsdtar = &bsdtar_storage;
+ memset(bsdtar, 0, sizeof(*bsdtar));
+ bsdtar->fd = -1; /* Mark as "unused" */
+ bsdtar->gid = -1;
+ bsdtar->uid = -1;
+ option_o = 0;
+
+#if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
+ { /* Catch SIGINFO and SIGUSR1, if they exist. */
+ struct sigaction sa;
+ sa.sa_handler = siginfo_handler;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+#ifdef SIGINFO
+ if (sigaction(SIGINFO, &sa, NULL))
+ lafe_errc(1, errno, "sigaction(SIGINFO) failed");
+#endif
+#ifdef SIGUSR1
+ /* ... and treat SIGUSR1 the same way as SIGINFO. */
+ if (sigaction(SIGUSR1, &sa, NULL))
+ lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
+#endif
+ }
+#endif
+
+
+ /* Need lafe_progname before calling lafe_warnc. */
+ if (*argv == NULL)
+ lafe_progname = "bsdtar";
+ else {
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ lafe_progname = strrchr(*argv, '\\');
+#else
+ lafe_progname = strrchr(*argv, '/');
+#endif
+ if (lafe_progname != NULL)
+ lafe_progname++;
+ else
+ lafe_progname = *argv;
+ }
+
+ time(&now);
+
+#if HAVE_SETLOCALE
+ if (setlocale(LC_ALL, "") == NULL)
+ lafe_warnc(0, "Failed to set default locale");
+#endif
+#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
+ bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
+#endif
+ possible_help_request = 0;
+
+ /* Look up uid of current user for future reference */
+ bsdtar->user_uid = geteuid();
+
+ /* Default: open tape drive. */
+ bsdtar->filename = getenv("TAPE");
+ if (bsdtar->filename == NULL)
+ bsdtar->filename = _PATH_DEFTAPE;
+
+ /* Default: preserve mod time on extract */
+ bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
+
+ /* Default: Perform basic security checks. */
+ bsdtar->extract_flags |= SECURITY;
+
+#ifndef _WIN32
+ /* On POSIX systems, assume --same-owner and -p when run by
+ * the root user. This doesn't make any sense on Windows. */
+ if (bsdtar->user_uid == 0) {
+ /* --same-owner */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
+ /* -p */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
+ }
+#endif
+
+ bsdtar->argv = argv;
+ bsdtar->argc = argc;
+
+ /*
+ * Comments following each option indicate where that option
+ * originated: SUSv2, POSIX, GNU tar, star, etc. If there's
+ * no such comment, then I don't know of anyone else who
+ * implements that option.
+ */
+ while ((opt = bsdtar_getopt(bsdtar)) != -1) {
+ switch (opt) {
+ case 'B': /* GNU tar */
+ /* libarchive doesn't need this; just ignore it. */
+ break;
+ case 'b': /* SUSv2 */
+ t = atoi(bsdtar->optarg);
+ if (t <= 0 || t > 8192)
+ lafe_errc(1, 0,
+ "Argument to -b is out of range (1..8192)");
+ bsdtar->bytes_per_block = 512 * t;
+ break;
+ case 'C': /* GNU tar */
+ set_chdir(bsdtar, bsdtar->optarg);
+ break;
+ case 'c': /* SUSv2 */
+ set_mode(bsdtar, opt);
+ break;
+ case OPTION_CHECK_LINKS: /* GNU tar */
+ bsdtar->option_warn_links = 1;
+ break;
+ case OPTION_CHROOT: /* NetBSD */
+ bsdtar->option_chroot = 1;
+ break;
+ case OPTION_EXCLUDE: /* GNU tar */
+ if (lafe_exclude(&bsdtar->matching, bsdtar->optarg))
+ lafe_errc(1, 0,
+ "Couldn't exclude %s\n", bsdtar->optarg);
+ break;
+ case OPTION_FORMAT: /* GNU tar, others */
+ bsdtar->create_format = bsdtar->optarg;
+ break;
+ case 'f': /* SUSv2 */
+ bsdtar->filename = bsdtar->optarg;
+ if (strcmp(bsdtar->filename, "-") == 0)
+ bsdtar->filename = NULL;
+ break;
+ case OPTION_GID: /* cpio */
+ t = atoi(bsdtar->optarg);
+ if (t < 0)
+ lafe_errc(1, 0,
+ "Argument to --gid must be positive");
+ bsdtar->gid = t;
+ break;
+ case OPTION_GNAME: /* cpio */
+ bsdtar->gname = bsdtar->optarg;
+ break;
+ case 'H': /* BSD convention */
+ bsdtar->symlink_mode = 'H';
+ break;
+ case 'h': /* Linux Standards Base, gtar; synonym for -L */
+ bsdtar->symlink_mode = 'L';
+ /* Hack: -h by itself is the "help" command. */
+ possible_help_request = 1;
+ break;
+ case OPTION_HELP: /* GNU tar, others */
+ long_help();
+ exit(0);
+ break;
+ case 'I': /* GNU tar */
+ /*
+ * TODO: Allow 'names' to come from an archive,
+ * not just a text file. Design a good UI for
+ * allowing names and mode/owner to be read
+ * from an archive, with contents coming from
+ * disk. This can be used to "refresh" an
+ * archive or to design archives with special
+ * permissions without having to create those
+ * permissions on disk.
+ */
+ bsdtar->names_from_file = bsdtar->optarg;
+ break;
+ case OPTION_INCLUDE:
+ /*
+ * Noone else has the @archive extension, so
+ * noone else needs this to filter entries
+ * when transforming archives.
+ */
+ if (lafe_include(&bsdtar->matching, bsdtar->optarg))
+ lafe_errc(1, 0,
+ "Failed to add %s to inclusion list",
+ bsdtar->optarg);
+ break;
+ case 'j': /* GNU tar */
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case 'J': /* GNU tar 1.21 and later */
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case 'k': /* GNU tar */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
+ break;
+ case OPTION_KEEP_NEWER_FILES: /* GNU tar */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
+ break;
+ case 'L': /* BSD convention */
+ bsdtar->symlink_mode = 'L';
+ break;
+ case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
+ /* GNU tar 1.13 used -l for --one-file-system */
+ bsdtar->option_warn_links = 1;
+ break;
+ case OPTION_LZMA:
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case 'm': /* SUSv2 */
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
+ break;
+ case 'n': /* GNU tar */
+ bsdtar->option_no_subdirs = 1;
+ break;
+ /*
+ * Selecting files by time:
+ * --newer-?time='date' Only files newer than 'date'
+ * --newer-?time-than='file' Only files newer than time
+ * on specified file (useful for incremental backups)
+ * TODO: Add corresponding "older" options to reverse these.
+ */
+ case OPTION_NEWER_CTIME: /* GNU tar */
+ bsdtar->newer_ctime_sec = get_date(now, bsdtar->optarg);
+ break;
+ case OPTION_NEWER_CTIME_THAN:
+ {
+ struct stat st;
+ if (stat(bsdtar->optarg, &st) != 0)
+ lafe_errc(1, 0,
+ "Can't open file %s", bsdtar->optarg);
+ bsdtar->newer_ctime_sec = st.st_ctime;
+ bsdtar->newer_ctime_nsec =
+ ARCHIVE_STAT_CTIME_NANOS(&st);
+ }
+ break;
+ case OPTION_NEWER_MTIME: /* GNU tar */
+ bsdtar->newer_mtime_sec = get_date(now, bsdtar->optarg);
+ break;
+ case OPTION_NEWER_MTIME_THAN:
+ {
+ struct stat st;
+ if (stat(bsdtar->optarg, &st) != 0)
+ lafe_errc(1, 0,
+ "Can't open file %s", bsdtar->optarg);
+ bsdtar->newer_mtime_sec = st.st_mtime;
+ bsdtar->newer_mtime_nsec =
+ ARCHIVE_STAT_MTIME_NANOS(&st);
+ }
+ break;
+ case OPTION_NODUMP: /* star */
+ bsdtar->option_honor_nodump = 1;
+ break;
+ case OPTION_NO_SAME_OWNER: /* GNU tar */
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
+ break;
+ case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
+ break;
+ case OPTION_NULL: /* GNU tar */
+ bsdtar->option_null++;
+ break;
+ case OPTION_NUMERIC_OWNER: /* GNU tar */
+ bsdtar->uname = "";
+ bsdtar->gname = "";
+ break;
+ case 'O': /* GNU tar */
+ bsdtar->option_stdout = 1;
+ break;
+ case 'o': /* SUSv2 and GNU conflict here, but not fatally */
+ option_o = 1; /* Record it and resolve it later. */
+ break;
+ case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
+ bsdtar->option_dont_traverse_mounts = 1;
+ break;
+ case OPTION_OPTIONS:
+ bsdtar->option_options = bsdtar->optarg;
+ break;
+#if 0
+ /*
+ * The common BSD -P option is not necessary, since
+ * our default is to archive symlinks, not follow
+ * them. This is convenient, as -P conflicts with GNU
+ * tar anyway.
+ */
+ case 'P': /* BSD convention */
+ /* Default behavior, no option necessary. */
+ break;
+#endif
+ case 'P': /* GNU tar */
+ bsdtar->extract_flags &= ~SECURITY;
+ bsdtar->option_absolute_paths = 1;
+ break;
+ case 'p': /* GNU tar, star */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
+ break;
+ case OPTION_POSIX: /* GNU tar */
+ bsdtar->create_format = "pax";
+ break;
+ case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
+ bsdtar->option_fast_read = 1;
+ break;
+ case 'r': /* SUSv2 */
+ set_mode(bsdtar, opt);
+ break;
+ case 'S': /* NetBSD pax-as-tar */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
+ break;
+ case 's': /* NetBSD pax-as-tar */
+#if HAVE_REGEX_H
+ add_substitution(bsdtar, bsdtar->optarg);
+#else
+ lafe_warnc(0,
+ "-s is not supported by this version of bsdtar");
+ usage();
+#endif
+ break;
+ case OPTION_SAME_OWNER: /* GNU tar */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
+ break;
+ case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
+ bsdtar->strip_components = atoi(bsdtar->optarg);
+ break;
+ case 'T': /* GNU tar */
+ bsdtar->names_from_file = bsdtar->optarg;
+ break;
+ case 't': /* SUSv2 */
+ set_mode(bsdtar, opt);
+ bsdtar->verbose++;
+ break;
+ case OPTION_TOTALS: /* GNU tar */
+ bsdtar->option_totals++;
+ break;
+ case 'U': /* GNU tar */
+ bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
+ bsdtar->option_unlink_first = 1;
+ break;
+ case 'u': /* SUSv2 */
+ set_mode(bsdtar, opt);
+ break;
+ case OPTION_UID: /* cpio */
+ t = atoi(bsdtar->optarg);
+ if (t < 0)
+ lafe_errc(1, 0,
+ "Argument to --uid must be positive");
+ bsdtar->uid = t;
+ break;
+ case OPTION_UNAME: /* cpio */
+ bsdtar->uname = bsdtar->optarg;
+ break;
+ case 'v': /* SUSv2 */
+ bsdtar->verbose++;
+ break;
+ case OPTION_VERSION: /* GNU convention */
+ version();
+ break;
+#if 0
+ /*
+ * The -W longopt feature is handled inside of
+ * bsdtar_getopt(), so -W is not available here.
+ */
+ case 'W': /* Obscure GNU convention. */
+ break;
+#endif
+ case 'w': /* SUSv2 */
+ bsdtar->option_interactive = 1;
+ break;
+ case 'X': /* GNU tar */
+ if (lafe_exclude_from_file(&bsdtar->matching, bsdtar->optarg))
+ lafe_errc(1, 0,
+ "failed to process exclusions from file %s",
+ bsdtar->optarg);
+ break;
+ case 'x': /* SUSv2 */
+ set_mode(bsdtar, opt);
+ break;
+ case 'y': /* FreeBSD version of GNU tar */
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case 'Z': /* GNU tar */
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case 'z': /* GNU tar, star, many others */
+ if (bsdtar->create_compression != '\0')
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt,
+ bsdtar->create_compression);
+ bsdtar->create_compression = opt;
+ break;
+ case OPTION_USE_COMPRESS_PROGRAM:
+ bsdtar->compress_program = bsdtar->optarg;
+ break;
+ default:
+ usage();
+ }
+ }
+
+ /*
+ * Sanity-check options.
+ */
+
+ /* If no "real" mode was specified, treat -h as --help. */
+ if ((bsdtar->mode == '\0') && possible_help_request) {
+ long_help();
+ exit(0);
+ }
+
+ /* Otherwise, a mode is required. */
+ if (bsdtar->mode == '\0')
+ lafe_errc(1, 0,
+ "Must specify one of -c, -r, -t, -u, -x");
+
+ /* Check boolean options only permitted in certain modes. */
+ if (bsdtar->option_dont_traverse_mounts)
+ only_mode(bsdtar, "--one-file-system", "cru");
+ if (bsdtar->option_fast_read)
+ only_mode(bsdtar, "--fast-read", "xt");
+ if (bsdtar->option_honor_nodump)
+ only_mode(bsdtar, "--nodump", "cru");
+ if (option_o > 0) {
+ switch (bsdtar->mode) {
+ case 'c':
+ /*
+ * In GNU tar, -o means "old format." The
+ * "ustar" format is the closest thing
+ * supported by libarchive.
+ */
+ bsdtar->create_format = "ustar";
+ /* TODO: bsdtar->create_format = "v7"; */
+ break;
+ case 'x':
+ /* POSIX-compatible behavior. */
+ bsdtar->option_no_owner = 1;
+ bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
+ break;
+ default:
+ only_mode(bsdtar, "-o", "xc");
+ break;
+ }
+ }
+ if (bsdtar->option_no_subdirs)
+ only_mode(bsdtar, "-n", "cru");
+ if (bsdtar->option_stdout)
+ only_mode(bsdtar, "-O", "xt");
+ if (bsdtar->option_unlink_first)
+ only_mode(bsdtar, "-U", "x");
+ if (bsdtar->option_warn_links)
+ only_mode(bsdtar, "--check-links", "cr");
+
+ /* Check other parameters only permitted in certain modes. */
+ if (bsdtar->create_compression != '\0') {
+ strcpy(buff, "-?");
+ buff[1] = bsdtar->create_compression;
+ only_mode(bsdtar, buff, "cxt");
+ }
+ if (bsdtar->create_format != NULL)
+ only_mode(bsdtar, "--format", "cru");
+ if (bsdtar->symlink_mode != '\0') {
+ strcpy(buff, "-?");
+ buff[1] = bsdtar->symlink_mode;
+ only_mode(bsdtar, buff, "cru");
+ }
+ if (bsdtar->strip_components != 0)
+ only_mode(bsdtar, "--strip-components", "xt");
+
+ switch(bsdtar->mode) {
+ case 'c':
+ tar_mode_c(bsdtar);
+ break;
+ case 'r':
+ tar_mode_r(bsdtar);
+ break;
+ case 't':
+ tar_mode_t(bsdtar);
+ break;
+ case 'u':
+ tar_mode_u(bsdtar);
+ break;
+ case 'x':
+ tar_mode_x(bsdtar);
+ break;
+ }
+
+ lafe_cleanup_exclusions(&bsdtar->matching);
+#if HAVE_REGEX_H
+ cleanup_substitution(bsdtar);
+#endif
+
+ if (bsdtar->return_value != 0)
+ lafe_warnc(0,
+ "Error exit delayed from previous errors.");
+ return (bsdtar->return_value);
+}
+
+static void
+set_mode(struct bsdtar *bsdtar, char opt)
+{
+ if (bsdtar->mode != '\0' && bsdtar->mode != opt)
+ lafe_errc(1, 0,
+ "Can't specify both -%c and -%c", opt, bsdtar->mode);
+ bsdtar->mode = opt;
+}
+
+/*
+ * Verify that the mode is correct.
+ */
+static void
+only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
+{
+ if (strchr(valid_modes, bsdtar->mode) == NULL)
+ lafe_errc(1, 0,
+ "Option %s is not permitted in mode -%c",
+ opt, bsdtar->mode);
+}
+
+
+void
+usage(void)
+{
+ const char *p;
+
+ p = lafe_progname;
+
+ fprintf(stderr, "Usage:\n");
+ fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
+ fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
+ fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
+ fprintf(stderr, " Help: %s --help\n", p);
+ exit(1);
+}
+
+static void
+version(void)
+{
+ printf("bsdtar %s - %s\n",
+ BSDTAR_VERSION_STRING,
+ archive_version());
+ exit(0);
+}
+
+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, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n"
+ " --format {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";
+
+
+/*
+ * Note that the word 'bsdtar' will always appear in the first line
+ * of output.
+ *
+ * In particular, /bin/sh scripts that need to test for the presence
+ * of bsdtar can use the following template:
+ *
+ * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
+ * echo bsdtar; else echo not bsdtar; fi
+ */
+static void
+long_help(void)
+{
+ const char *prog;
+ const char *p;
+
+ prog = lafe_progname;
+
+ fflush(stderr);
+
+ p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
+ printf("%s%s: manipulate archive files\n", prog, p);
+
+ for (p = long_help_msg; *p != '\0'; p++) {
+ if (*p == '%') {
+ if (p[1] == 'p') {
+ fputs(prog, stdout);
+ p++;
+ } else
+ putchar('%');
+ } else
+ putchar(*p);
+ }
+ version();
+}
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