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cmake/Utilities/cmlibarchive/tar/bsdtar.c

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/*-
* 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 <cm_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
static struct bsdtar *_bsdtar;
#if 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" */
option_o = 0;
#if 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 > 1024)
lafe_errc(1, 0,
"Argument to -b is out of range (1..1024)");
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 OPTION_OPTIONS:
bsdtar->option_options = bsdtar->optarg;
break;
case 'f': /* SUSv2 */
bsdtar->filename = bsdtar->optarg;
if (strcmp(bsdtar->filename, "-") == 0)
bsdtar->filename = NULL;
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->option_numeric_owner++;
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;
#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 '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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