From 3d051722dea893c1b813db8bbeae1430b9eddd52 Mon Sep 17 00:00:00 2001 From: Tomas Bzatek Date: Thu, 21 Aug 2008 20:11:09 +0200 Subject: Update libarchive to v2.5.5 --- libarchive/libarchive-2.5.5/tar/bsdtar.c | 959 +++++++++++++++++++++++++++++++ 1 file changed, 959 insertions(+) create mode 100644 libarchive/libarchive-2.5.5/tar/bsdtar.c (limited to 'libarchive/libarchive-2.5.5/tar/bsdtar.c') diff --git a/libarchive/libarchive-2.5.5/tar/bsdtar.c b/libarchive/libarchive-2.5.5/tar/bsdtar.c new file mode 100644 index 0000000..1c13cc6 --- /dev/null +++ b/libarchive/libarchive-2.5.5/tar/bsdtar.c @@ -0,0 +1,959 @@ +/*- + * Copyright (c) 2003-2007 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 1.91 2008/05/26 17:10:10 kientzle Exp $"); + +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_STAT_H +#include +#endif +#ifdef HAVE_ERRNO_H +#include +#endif +#ifdef HAVE_FCNTL_H +#include +#endif +#ifdef HAVE_GETOPT_LONG +#include +#else +struct option { + const char *name; + int has_arg; + int *flag; + int val; +}; +#define no_argument 0 +#define required_argument 1 +#endif +#ifdef HAVE_LANGINFO_H +#include +#endif +#ifdef HAVE_LOCALE_H +#include +#endif +#ifdef HAVE_PATHS_H +#include +#endif +#include +#ifdef HAVE_STDLIB_H +#include +#endif +#ifdef HAVE_STRING_H +#include +#endif +#ifdef HAVE_TIME_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif +#if HAVE_ZLIB_H +#include +#endif + +#include "bsdtar.h" + +#if !HAVE_DECL_OPTARG +extern int optarg; +#endif + +#if !HAVE_DECL_OPTIND +extern int optind; +#endif + +/* + * 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 + +#ifndef _PATH_DEFTAPE +#define _PATH_DEFTAPE "/dev/tape" +#endif + +/* External function to parse a date/time string (from getdate.y) */ +time_t get_date(const char *); + +static int bsdtar_getopt(struct bsdtar *, const char *optstring, + const struct option **poption); +static void long_help(struct bsdtar *); +static void only_mode(struct bsdtar *, const char *opt, + const char *valid); +static char ** rewrite_argv(struct bsdtar *, + int *argc, char ** src_argv, + const char *optstring); +static void set_mode(struct bsdtar *, char opt); +static void version(void); + +/* + * The leading '+' here forces the GNU version of getopt() (as well as + * both the GNU and BSD versions of getopt_long) to stop at the first + * non-option. Otherwise, GNU getopt() permutes the arguments and + * screws up -C processing. + */ +static const char *tar_opts = "+Bb:C:cf:HhI:jkLlmnOoPprts:ST:UuvW:wX:xyZz"; + +/* + * Most of these long options are deliberately not documented. They + * are provided only to make life easier for people who also use GNU tar. + * The only long options documented in the manual page are the ones + * with no corresponding short option, such as --exclude, --nodump, + * and --fast-read. + * + * On systems that lack getopt_long, long options can be specified + * using -W longopt and -W longopt=value, e.g. "-W nodump" is the same + * as "--nodump" and "-W exclude=pattern" is the same as "--exclude + * pattern". This does not rely the GNU getopt() "W;" extension, so + * should work correctly on any system with a POSIX-compliant getopt(). + */ + +/* Fake short equivalents for long options that otherwise lack them. */ +enum { + OPTION_CHECK_LINKS = 1, + OPTION_CHROOT, + OPTION_EXCLUDE, + OPTION_FORMAT, + OPTION_HELP, + OPTION_INCLUDE, + OPTION_KEEP_NEWER_FILES, + OPTION_NEWER_CTIME, + OPTION_NEWER_CTIME_THAN, + OPTION_NEWER_MTIME, + OPTION_NEWER_MTIME_THAN, + OPTION_NODUMP, + OPTION_NO_SAME_OWNER, + OPTION_NO_SAME_PERMISSIONS, + OPTION_NULL, + OPTION_NUMERIC_OWNER, + OPTION_ONE_FILE_SYSTEM, + OPTION_POSIX, + OPTION_STRIP_COMPONENTS, + OPTION_TOTALS, + OPTION_USE_COMPRESS_PROGRAM, + OPTION_VERSION +}; + +/* + * If you add anything, be very careful to keep this list properly + * sorted, as the -W logic relies on it. + */ +static const struct option tar_longopts[] = { + { "absolute-paths", no_argument, NULL, 'P' }, + { "append", no_argument, NULL, 'r' }, + { "block-size", required_argument, NULL, 'b' }, + { "bunzip2", no_argument, NULL, 'j' }, + { "bzip", no_argument, NULL, 'j' }, + { "bzip2", no_argument, NULL, 'j' }, + { "cd", required_argument, NULL, 'C' }, + { "check-links", no_argument, NULL, OPTION_CHECK_LINKS }, + { "chroot", no_argument, NULL, OPTION_CHROOT }, + { "compress", no_argument, NULL, 'Z' }, + { "confirmation", no_argument, NULL, 'w' }, + { "create", no_argument, NULL, 'c' }, + { "dereference", no_argument, NULL, 'L' }, + { "directory", required_argument, NULL, 'C' }, + { "exclude", required_argument, NULL, OPTION_EXCLUDE }, + { "exclude-from", required_argument, NULL, 'X' }, + { "extract", no_argument, NULL, 'x' }, + { "fast-read", no_argument, NULL, 'q' }, + { "file", required_argument, NULL, 'f' }, + { "files-from", required_argument, NULL, 'T' }, + { "format", required_argument, NULL, OPTION_FORMAT }, + { "gunzip", no_argument, NULL, 'z' }, + { "gzip", no_argument, NULL, 'z' }, + { "help", no_argument, NULL, OPTION_HELP }, + { "include", required_argument, NULL, OPTION_INCLUDE }, + { "interactive", no_argument, NULL, 'w' }, + { "insecure", no_argument, NULL, 'P' }, + { "keep-newer-files", no_argument, NULL, OPTION_KEEP_NEWER_FILES }, + { "keep-old-files", no_argument, NULL, 'k' }, + { "list", no_argument, NULL, 't' }, + { "modification-time", no_argument, NULL, 'm' }, + { "newer", required_argument, NULL, OPTION_NEWER_CTIME }, + { "newer-ctime", required_argument, NULL, OPTION_NEWER_CTIME }, + { "newer-ctime-than", required_argument, NULL, OPTION_NEWER_CTIME_THAN }, + { "newer-mtime", required_argument, NULL, OPTION_NEWER_MTIME }, + { "newer-mtime-than", required_argument, NULL, OPTION_NEWER_MTIME_THAN }, + { "newer-than", required_argument, NULL, OPTION_NEWER_CTIME_THAN }, + { "nodump", no_argument, NULL, OPTION_NODUMP }, + { "norecurse", no_argument, NULL, 'n' }, + { "no-recursion", no_argument, NULL, 'n' }, + { "no-same-owner", no_argument, NULL, OPTION_NO_SAME_OWNER }, + { "no-same-permissions",no_argument, NULL, OPTION_NO_SAME_PERMISSIONS }, + { "null", no_argument, NULL, OPTION_NULL }, + { "numeric-owner", no_argument, NULL, OPTION_NUMERIC_OWNER }, + { "one-file-system", no_argument, NULL, OPTION_ONE_FILE_SYSTEM }, + { "posix", no_argument, NULL, OPTION_POSIX }, + { "preserve-permissions", no_argument, NULL, 'p' }, + { "read-full-blocks", no_argument, NULL, 'B' }, + { "same-permissions", no_argument, NULL, 'p' }, + { "strip-components", required_argument, NULL, OPTION_STRIP_COMPONENTS }, + { "to-stdout", no_argument, NULL, 'O' }, + { "totals", no_argument, NULL, OPTION_TOTALS }, + { "uncompress", no_argument, NULL, 'Z' }, + { "unlink", no_argument, NULL, 'U' }, + { "unlink-first", no_argument, NULL, 'U' }, + { "update", no_argument, NULL, 'u' }, + { "use-compress-program", + required_argument, NULL, OPTION_USE_COMPRESS_PROGRAM }, + { "verbose", no_argument, NULL, 'v' }, + { "version", no_argument, NULL, OPTION_VERSION }, + { NULL, 0, NULL, 0 } +}; + +/* 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; + const struct option *option; + int opt, t; + char option_o; + char possible_help_request; + char buff[16]; + + /* + * Use a pointer for consistency, but stack-allocated storage + * for ease of cleanup. + */ + bsdtar = &bsdtar_storage; + memset(bsdtar, 0, sizeof(*bsdtar)); + bsdtar->fd = -1; /* Mark as "unused" */ + option_o = 0; + + /* Need bsdtar->progname before calling bsdtar_warnc. */ + if (*argv == NULL) + bsdtar->progname = "bsdtar"; + else { + bsdtar->progname = strrchr(*argv, '/'); + if (bsdtar->progname != NULL) + bsdtar->progname++; + else + bsdtar->progname = *argv; + } + + if (setlocale(LC_ALL, "") == NULL) + bsdtar_warnc(bsdtar, 0, "Failed to set default locale"); +#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; + + /* Defaults for root user: */ + 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; + } + + /* Rewrite traditional-style tar arguments, if used. */ + argv = rewrite_argv(bsdtar, &argc, argv, tar_opts); + + bsdtar->argv = argv; + bsdtar->argc = argc; + + /* Process all remaining arguments now. */ + /* + * 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, tar_opts, &option)) != -1) { + switch (opt) { + case 'B': /* GNU tar */ + /* libarchive doesn't need this; just ignore it. */ + break; + case 'b': /* SUSv2 */ + t = atoi(optarg); + if (t <= 0 || t > 1024) + bsdtar_errc(bsdtar, 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, 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 (exclude(bsdtar, optarg)) + bsdtar_errc(bsdtar, 1, 0, + "Couldn't exclude %s\n", optarg); + break; + case OPTION_FORMAT: /* GNU tar, others */ + bsdtar->create_format = optarg; + break; + case 'f': /* SUSv2 */ + bsdtar->filename = 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(bsdtar); + 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 = optarg; + break; + case OPTION_INCLUDE: + /* + * Noone else has the @archive extension, so + * noone else needs this to filter entries + * when transforming archives. + */ + if (include(bsdtar, optarg)) + bsdtar_errc(bsdtar, 1, 0, + "Failed to add %s to inclusion list", + optarg); + break; + case 'j': /* GNU tar */ +#if HAVE_LIBBZ2 + if (bsdtar->create_compression != '\0') + bsdtar_errc(bsdtar, 1, 0, + "Can't specify both -%c and -%c", opt, + bsdtar->create_compression); + bsdtar->create_compression = opt; +#else + bsdtar_warnc(bsdtar, 0, "-j compression not supported by this version of bsdtar"); + usage(bsdtar); +#endif + 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 '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(optarg); + break; + case OPTION_NEWER_CTIME_THAN: + { + struct stat st; + if (stat(optarg, &st) != 0) + bsdtar_errc(bsdtar, 1, 0, + "Can't open file %s", 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(optarg); + break; + case OPTION_NEWER_MTIME_THAN: + { + struct stat st; + if (stat(optarg, &st) != 0) + bsdtar_errc(bsdtar, 1, 0, + "Can't open file %s", 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, optarg); +#else + bsdtar_warnc(bsdtar, 0, "-s is not supported by this version of bsdtar"); + usage(bsdtar); +#endif + break; + case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ + bsdtar->strip_components = atoi(optarg); + break; + case 'T': /* GNU tar */ + bsdtar->names_from_file = 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_getop(), so -W is not available here. + */ + case 'W': /* Obscure, but useful GNU convention. */ + break; +#endif + case 'w': /* SUSv2 */ + bsdtar->option_interactive = 1; + break; + case 'X': /* GNU tar */ + if (exclude_from_file(bsdtar, optarg)) + bsdtar_errc(bsdtar, 1, 0, + "failed to process exclusions from file %s", + optarg); + break; + case 'x': /* SUSv2 */ + set_mode(bsdtar, opt); + break; + case 'y': /* FreeBSD version of GNU tar */ +#if HAVE_LIBBZ2 + if (bsdtar->create_compression != '\0') + bsdtar_errc(bsdtar, 1, 0, + "Can't specify both -%c and -%c", opt, + bsdtar->create_compression); + bsdtar->create_compression = opt; +#else + bsdtar_warnc(bsdtar, 0, "-y compression not supported by this version of bsdtar"); + usage(bsdtar); +#endif + break; + case 'Z': /* GNU tar */ + if (bsdtar->create_compression != '\0') + bsdtar_errc(bsdtar, 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 HAVE_LIBZ + if (bsdtar->create_compression != '\0') + bsdtar_errc(bsdtar, 1, 0, + "Can't specify both -%c and -%c", opt, + bsdtar->create_compression); + bsdtar->create_compression = opt; +#else + bsdtar_warnc(bsdtar, 0, "-z compression not supported by this version of bsdtar"); + usage(bsdtar); +#endif + break; + case OPTION_USE_COMPRESS_PROGRAM: + bsdtar->compress_program = optarg; + break; + default: + usage(bsdtar); + } + } + + /* + * Sanity-check options. + */ + + /* If no "real" mode was specified, treat -h as --help. */ + if ((bsdtar->mode == '\0') && possible_help_request) { + long_help(bsdtar); + exit(0); + } + + /* Otherwise, a mode is required. */ + if (bsdtar->mode == '\0') + bsdtar_errc(bsdtar, 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"); + + bsdtar->argc -= optind; + bsdtar->argv += optind; + + 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; + } + + cleanup_exclusions(bsdtar); +#if HAVE_REGEX_H + cleanup_substitution(bsdtar); +#endif + + if (bsdtar->return_value != 0) + bsdtar_warnc(bsdtar, 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) + bsdtar_errc(bsdtar, 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) + bsdtar_errc(bsdtar, 1, 0, + "Option %s is not permitted in mode -%c", + opt, bsdtar->mode); +} + + +/*- + * Convert traditional tar arguments into new-style. + * For example, + * tar tvfb file.tar 32 --exclude FOO + * will be converted to + * tar -t -v -f file.tar -b 32 --exclude FOO + * + * This requires building a new argv array. The initial bundled word + * gets expanded into a new string that looks like "-t\0-v\0-f\0-b\0". + * The new argv array has pointers into this string intermingled with + * pointers to the existing arguments. Arguments are moved to + * immediately follow their options. + * + * The optstring argument here is the same one passed to getopt(3). + * It is used to determine which option letters have trailing arguments. + */ +char ** +rewrite_argv(struct bsdtar *bsdtar, int *argc, char **src_argv, + const char *optstring) +{ + char **new_argv, **dest_argv; + const char *p; + char *src, *dest; + + if (src_argv[0] == NULL || src_argv[1] == NULL || + src_argv[1][0] == '-' || src_argv[1][0] == '\0') + return (src_argv); + + *argc += strlen(src_argv[1]) - 1; + new_argv = malloc((*argc + 1) * sizeof(new_argv[0])); + if (new_argv == NULL) + bsdtar_errc(bsdtar, 1, errno, "No Memory"); + + dest_argv = new_argv; + *dest_argv++ = *src_argv++; + + dest = malloc(strlen(*src_argv) * 3); + if (dest == NULL) + bsdtar_errc(bsdtar, 1, errno, "No memory"); + for (src = *src_argv++; *src != '\0'; src++) { + *dest_argv++ = dest; + *dest++ = '-'; + *dest++ = *src; + *dest++ = '\0'; + /* 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; + + fprintf(stderr, "Usage:\n"); + fprintf(stderr, " List: %s -tf \n", p); + fprintf(stderr, " Extract: %s -xf \n", p); + fprintf(stderr, " Create: %s -cf [filenames...]\n", p); +#ifdef HAVE_GETOPT_LONG + fprintf(stderr, " Help: %s --help\n", p); +#else + fprintf(stderr, " Help: %s -h\n", p); +#endif + 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 Location of archive (default " _PATH_DEFTAPE ")\n" + " -v Verbose\n" + " -w Interactive\n" + "Create: %p -c [options] [ | | @ | -C ]\n" + " , add these items to archive\n" + " -z, -j Compress archive with gzip/bzip2\n" + " --format {ustar|pax|cpio|shar} Select archive format\n" +#ifdef HAVE_GETOPT_LONG + " --exclude Skip files that match pattern\n" +#else + " -W exclude= Skip files that match pattern\n" +#endif + " -C Change to before processing remaining files\n" + " @ Add entries from to output\n" + "List: %p -t [options] []\n" + " If specified, list only entries that match\n" + "Extract: %p -x [options] []\n" + " 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(struct bsdtar *bsdtar) +{ + const char *prog; + const char *p; + + prog = bsdtar->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(); +} + +static int +bsdtar_getopt(struct bsdtar *bsdtar, const char *optstring, + const struct option **poption) +{ + char *p, *q; + const struct option *option; + int opt; + int option_index; + size_t option_length; + + option_index = -1; + *poption = NULL; + +#ifdef HAVE_GETOPT_LONG + opt = getopt_long(bsdtar->argc, bsdtar->argv, optstring, + tar_longopts, &option_index); + if (option_index > -1) + *poption = tar_longopts + option_index; +#else + opt = getopt(bsdtar->argc, bsdtar->argv, optstring); +#endif + + /* Support long options through -W longopt=value */ + if (opt == 'W') { + p = optarg; + q = strchr(optarg, '='); + if (q != NULL) { + option_length = (size_t)(q - p); + optarg = q + 1; + } else { + option_length = strlen(p); + optarg = NULL; + } + option = tar_longopts; + while (option->name != NULL && + (strlen(option->name) < option_length || + strncmp(p, option->name, option_length) != 0 )) { + option++; + } + + if (option->name != NULL) { + *poption = option; + opt = option->val; + + /* If the first match was exact, we're done. */ + if (strncmp(p, option->name, strlen(option->name)) == 0) { + while (option->name != NULL) + option++; + } else { + /* Check if there's another match. */ + option++; + while (option->name != NULL && + (strlen(option->name) < option_length || + strncmp(p, option->name, option_length) != 0)) { + option++; + } + } + if (option->name != NULL) + bsdtar_errc(bsdtar, 1, 0, + "Ambiguous option %s " + "(matches both %s and %s)", + p, (*poption)->name, option->name); + + if ((*poption)->has_arg == required_argument + && optarg == NULL) + bsdtar_errc(bsdtar, 1, 0, + "Option \"%s\" requires argument", p); + } else { + opt = '?'; + /* TODO: Set up a fake 'struct option' for + * error reporting... ? ? ? */ + } + } + + return (opt); +} -- cgit v1.2.3