/*-
- * Copyright (c) 2003-2007 Tim Kientzle
+ * Copyright (c) 2003-2008 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
-#ifdef HAVE_GETOPT_LONG
-#include <getopt.h>
-#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 <langinfo.h>
#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.
/* 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:jkLlmnOoPpqrts: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 \
main(int argc, char **argv)
{
struct bsdtar *bsdtar, bsdtar_storage;
- const struct option *option;
int opt, t;
char option_o;
char possible_help_request;
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) {
+ 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(optarg);
+ t = atoi(bsdtar->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);
+ set_chdir(bsdtar, bsdtar->optarg);
break;
case 'c': /* SUSv2 */
set_mode(bsdtar, opt);
bsdtar->option_chroot = 1;
break;
case OPTION_EXCLUDE: /* GNU tar */
- if (exclude(bsdtar, optarg))
+ if (exclude(bsdtar, bsdtar->optarg))
bsdtar_errc(bsdtar, 1, 0,
- "Couldn't exclude %s\n", optarg);
+ "Couldn't exclude %s\n", bsdtar->optarg);
break;
case OPTION_FORMAT: /* GNU tar, others */
- bsdtar->create_format = optarg;
+ bsdtar->create_format = bsdtar->optarg;
break;
case 'f': /* SUSv2 */
- bsdtar->filename = optarg;
+ bsdtar->filename = bsdtar->optarg;
if (strcmp(bsdtar->filename, "-") == 0)
bsdtar->filename = NULL;
break;
* permissions without having to create those
* permissions on disk.
*/
- bsdtar->names_from_file = optarg;
+ bsdtar->names_from_file = bsdtar->optarg;
break;
case OPTION_INCLUDE:
/*
* noone else needs this to filter entries
* when transforming archives.
*/
- if (include(bsdtar, optarg))
+ if (include(bsdtar, bsdtar->optarg))
bsdtar_errc(bsdtar, 1, 0,
"Failed to add %s to inclusion list",
- optarg);
+ bsdtar->optarg);
break;
case 'j': /* GNU tar */
#if HAVE_LIBBZ2
bsdtar->create_compression);
bsdtar->create_compression = opt;
#else
- bsdtar_warnc(bsdtar, 0, "-j compression not supported by this version of bsdtar");
+ bsdtar_warnc(bsdtar, 0,
+ "bzip2 compression not supported by this version of bsdtar");
usage(bsdtar);
#endif
break;
* TODO: Add corresponding "older" options to reverse these.
*/
case OPTION_NEWER_CTIME: /* GNU tar */
- bsdtar->newer_ctime_sec = get_date(optarg);
+ bsdtar->newer_ctime_sec = get_date(bsdtar->optarg);
break;
case OPTION_NEWER_CTIME_THAN:
{
struct stat st;
- if (stat(optarg, &st) != 0)
+ if (stat(bsdtar->optarg, &st) != 0)
bsdtar_errc(bsdtar, 1, 0,
- "Can't open file %s", optarg);
+ "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(optarg);
+ bsdtar->newer_mtime_sec = get_date(bsdtar->optarg);
break;
case OPTION_NEWER_MTIME_THAN:
{
struct stat st;
- if (stat(optarg, &st) != 0)
+ if (stat(bsdtar->optarg, &st) != 0)
bsdtar_errc(bsdtar, 1, 0,
- "Can't open file %s", optarg);
+ "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 's': /* NetBSD pax-as-tar */
#if HAVE_REGEX_H
- add_substitution(bsdtar, optarg);
+ add_substitution(bsdtar, bsdtar->optarg);
#else
- bsdtar_warnc(bsdtar, 0, "-s is not supported by this version of bsdtar");
+ 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);
+ bsdtar->strip_components = atoi(bsdtar->optarg);
break;
case 'T': /* GNU tar */
- bsdtar->names_from_file = optarg;
+ bsdtar->names_from_file = bsdtar->optarg;
break;
case 't': /* SUSv2 */
set_mode(bsdtar, opt);
#if 0
/*
* The -W longopt feature is handled inside of
- * bsdtar_getop(), so -W is not available here.
+ * bsdtar_getopt(), so -W is not available here.
*/
- case 'W': /* Obscure, but useful GNU convention. */
+ case 'W': /* Obscure GNU convention. */
break;
#endif
case 'w': /* SUSv2 */
bsdtar->option_interactive = 1;
break;
case 'X': /* GNU tar */
- if (exclude_from_file(bsdtar, optarg))
+ if (exclude_from_file(bsdtar, bsdtar->optarg))
bsdtar_errc(bsdtar, 1, 0,
"failed to process exclusions from file %s",
- optarg);
+ bsdtar->optarg);
break;
case 'x': /* SUSv2 */
set_mode(bsdtar, opt);
bsdtar->create_compression);
bsdtar->create_compression = opt;
#else
- bsdtar_warnc(bsdtar, 0, "-y compression not supported by this version of bsdtar");
+ bsdtar_warnc(bsdtar, 0,
+ "bzip2 compression not supported by this version of bsdtar");
usage(bsdtar);
#endif
break;
bsdtar->create_compression);
bsdtar->create_compression = opt;
#else
- bsdtar_warnc(bsdtar, 0, "-z compression not supported by this version of bsdtar");
+ bsdtar_warnc(bsdtar, 0,
+ "gzip compression not supported by this version of bsdtar");
usage(bsdtar);
#endif
break;
case OPTION_USE_COMPRESS_PROGRAM:
- bsdtar->compress_program = optarg;
+ bsdtar->compress_program = bsdtar->optarg;
break;
default:
usage(bsdtar);
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);
}
-/*-
- * 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)
{
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);
-#ifdef HAVE_GETOPT_LONG
fprintf(stderr, " Help: %s --help\n", p);
-#else
- fprintf(stderr, " Help: %s -h\n", p);
-#endif
exit(1);
}
" <file>, <dir> 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 <pattern> Skip files that match pattern\n"
-#else
- " -W exclude=<pattern> Skip files that match pattern\n"
-#endif
" -C <dir> Change to <dir> before processing remaining files\n"
" @<archive> Add entries from <archive> to output\n"
"List: %p -t [options] [<patterns>]\n"
}
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);
-}
--- /dev/null
+/*-
+ * 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.
+ */
+
+/*
+ * Command line parser for tar.
+ */
+
+#include "bsdtar_platform.h"
+__FBSDID("$FreeBSD$");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "bsdtar.h"
+
+/*
+ * Short options for tar. Please keep this sorted.
+ */
+static const char *short_options
+ = "Bb:C:cf:HhI:jkLlmnOoPpqrSs:T:tUuvW:wX:xyZz";
+
+/*
+ * Long options for tar. Please keep this list sorted.
+ *
+ * The symbolic names for options that lack a short equivalent are
+ * defined in bsdtar.h. Also note that so far I've found no need
+ * to support optional arguments to long options. That would be
+ * a small change to the code below.
+ */
+
+static struct option {
+ const char *name;
+ int required; /* 1 if this option requires an argument. */
+ int equivalent; /* Equivalent short option. */
+} tar_longopts[] = {
+ { "absolute-paths", 0, 'P' },
+ { "append", 0, 'r' },
+ { "block-size", 1, 'b' },
+ { "bunzip2", 0, 'j' },
+ { "bzip", 0, 'j' },
+ { "bzip2", 0, 'j' },
+ { "cd", 1, 'C' },
+ { "check-links", 0, OPTION_CHECK_LINKS },
+ { "chroot", 0, OPTION_CHROOT },
+ { "compress", 0, 'Z' },
+ { "confirmation", 0, 'w' },
+ { "create", 0, 'c' },
+ { "dereference", 0, 'L' },
+ { "directory", 1, 'C' },
+ { "exclude", 1, OPTION_EXCLUDE },
+ { "exclude-from", 1, 'X' },
+ { "extract", 0, 'x' },
+ { "fast-read", 0, 'q' },
+ { "file", 1, 'f' },
+ { "files-from", 1, 'T' },
+ { "format", 1, OPTION_FORMAT },
+ { "gunzip", 0, 'z' },
+ { "gzip", 0, 'z' },
+ { "help", 0, OPTION_HELP },
+ { "include", 1, OPTION_INCLUDE },
+ { "interactive", 0, 'w' },
+ { "insecure", 0, 'P' },
+ { "keep-newer-files", 0, OPTION_KEEP_NEWER_FILES },
+ { "keep-old-files", 0, 'k' },
+ { "list", 0, 't' },
+ { "modification-time", 0, 'm' },
+ { "newer", 1, OPTION_NEWER_CTIME },
+ { "newer-ctime", 1, OPTION_NEWER_CTIME },
+ { "newer-ctime-than", 1, OPTION_NEWER_CTIME_THAN },
+ { "newer-mtime", 1, OPTION_NEWER_MTIME },
+ { "newer-mtime-than", 1, OPTION_NEWER_MTIME_THAN },
+ { "newer-than", 1, OPTION_NEWER_CTIME_THAN },
+ { "nodump", 0, OPTION_NODUMP },
+ { "norecurse", 0, 'n' },
+ { "no-recursion", 0, 'n' },
+ { "no-same-owner", 0, OPTION_NO_SAME_OWNER },
+ { "no-same-permissions", 0, OPTION_NO_SAME_PERMISSIONS },
+ { "null", 0, OPTION_NULL },
+ { "numeric-owner", 0, OPTION_NUMERIC_OWNER },
+ { "one-file-system", 0, OPTION_ONE_FILE_SYSTEM },
+ { "posix", 0, OPTION_POSIX },
+ { "preserve-permissions", 0, 'p' },
+ { "read-full-blocks", 0, 'B' },
+ { "same-permissions", 0, 'p' },
+ { "strip-components", 1, OPTION_STRIP_COMPONENTS },
+ { "to-stdout", 0, 'O' },
+ { "totals", 0, OPTION_TOTALS },
+ { "uncompress", 0, 'Z' },
+ { "unlink", 0, 'U' },
+ { "unlink-first", 0, 'U' },
+ { "update", 0, 'u' },
+ { "use-compress-program", 1, OPTION_USE_COMPRESS_PROGRAM },
+ { "verbose", 0, 'v' },
+ { "version", 0, OPTION_VERSION },
+ { NULL, 0, 0 }
+};
+
+/*
+ * This getopt implementation has two key features that common
+ * getopt_long() implementations lack. Apart from those, it's a
+ * straightforward option parser, considerably simplified by not
+ * needing to support the wealth of exotic getopt_long() features. It
+ * has, of course, been shamelessly tailored for bsdtar. (If you're
+ * looking for a generic getopt_long() implementation for your
+ * project, I recommend Gregory Pietsch's public domain getopt_long()
+ * implementation.) The two additional features are:
+ *
+ * Old-style tar arguments: The original tar implementation treated
+ * the first argument word as a list of single-character option
+ * letters. All arguments follow as separate words. For example,
+ * tar xbf 32 /dev/tape
+ * Here, the "xbf" is three option letters, "32" is the argument for
+ * "b" and "/dev/tape" is the argument for "f". We support this usage
+ * if the first command-line argument does not begin with '-'. We
+ * also allow regular short and long options to follow, e.g.,
+ * tar xbf 32 /dev/tape -P --format=pax
+ *
+ * -W long options: There's an obscure GNU convention (only rarely
+ * supported even there) that allows "-W option=argument" as an
+ * alternative way to support long options. This was supported in
+ * early bsdtar as a way to access long options on platforms that did
+ * not support getopt_long() and is preserved here for backwards
+ * compatibility. (Of course, if I'd started with a custom
+ * command-line parser from the beginning, I would have had normal
+ * long option support on every platform so that hack wouldn't have
+ * been necessary. Oh, well. Some mistakes you just have to live
+ * with.)
+ *
+ * TODO: We should be able to use this to pull files and intermingled
+ * options (such as -C) from the command line in write mode. That
+ * will require a little rethinking of the argument handling in
+ * bsdtar.c.
+ *
+ * TODO: If we want to support arbitrary command-line options from -T
+ * input (as GNU tar does), we may need to extend this to handle option
+ * words from sources other than argv/arc. I'm not really sure if I
+ * like that feature of GNU tar, so it's certainly not a priority.
+ */
+
+int
+bsdtar_getopt(struct bsdtar *bsdtar)
+{
+ enum { state_start = 0, state_old_tar, state_next_word,
+ state_short, state_long };
+ static int state = state_start;
+ static char *opt_word;
+
+ const struct option *popt, *match = NULL, *match2 = NULL;
+ const char *p, *long_prefix = "--";
+ size_t optlength;
+ int opt = '?';
+ int required = 0;
+
+ bsdtar->optarg = NULL;
+
+ /* First time through, initialize everything. */
+ if (state == state_start) {
+ /* Skip program name. */
+ ++bsdtar->argv;
+ --bsdtar->argc;
+ if (*bsdtar->argv == NULL)
+ return (-1);
+ /* Decide between "new style" and "old style" arguments. */
+ if (bsdtar->argv[0][0] == '-') {
+ state = state_next_word;
+ } else {
+ state = state_old_tar;
+ opt_word = *bsdtar->argv++;
+ --bsdtar->argc;
+ }
+ }
+
+ /*
+ * We're parsing old-style tar arguments
+ */
+ if (state == state_old_tar) {
+ /* Get the next option character. */
+ opt = *opt_word++;
+ if (opt == '\0') {
+ /* New-style args can follow old-style. */
+ state = state_next_word;
+ } else {
+ /* See if it takes an argument. */
+ p = strchr(short_options, opt);
+ if (p == NULL)
+ return ('?');
+ if (p[1] == ':') {
+ bsdtar->optarg = *bsdtar->argv;
+ if (bsdtar->optarg == NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Option %c requires an argument",
+ opt);
+ return ('?');
+ }
+ ++bsdtar->argv;
+ --bsdtar->argc;
+ }
+ }
+ }
+
+ /*
+ * We're ready to look at the next word in argv.
+ */
+ if (state == state_next_word) {
+ /* No more arguments, so no more options. */
+ if (bsdtar->argv[0] == NULL)
+ return (-1);
+ /* Doesn't start with '-', so no more options. */
+ if (bsdtar->argv[0][0] != '-')
+ return (-1);
+ /* "--" marks end of options; consume it and return. */
+ if (strcmp(bsdtar->argv[0], "--") == 0) {
+ ++bsdtar->argv;
+ --bsdtar->argc;
+ return (-1);
+ }
+ /* Get next word for parsing. */
+ opt_word = *bsdtar->argv++;
+ --bsdtar->argc;
+ if (opt_word[1] == '-') {
+ /* Set up long option parser. */
+ state = state_long;
+ opt_word += 2; /* Skip leading '--' */
+ } else {
+ /* Set up short option parser. */
+ state = state_short;
+ ++opt_word; /* Skip leading '-' */
+ }
+ }
+
+ /*
+ * We're parsing a group of POSIX-style single-character options.
+ */
+ if (state == state_short) {
+ /* Peel next option off of a group of short options. */
+ opt = *opt_word++;
+ if (opt == '\0') {
+ /* End of this group; recurse to get next option. */
+ state = state_next_word;
+ return bsdtar_getopt(bsdtar);
+ }
+
+ /* Does this option take an argument? */
+ p = strchr(short_options, opt);
+ if (p == NULL)
+ return ('?');
+ if (p[1] == ':')
+ required = 1;
+
+ /* If it takes an argument, parse that. */
+ if (required) {
+ /* If arg is run-in, opt_word already points to it. */
+ if (opt_word[0] == '\0') {
+ /* Otherwise, pick up the next word. */
+ opt_word = *bsdtar->argv;
+ if (opt_word == NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Option -%c requires an argument",
+ opt);
+ return ('?');
+ }
+ ++bsdtar->argv;
+ --bsdtar->argc;
+ }
+ if (opt == 'W') {
+ state = state_long;
+ long_prefix = "-W "; /* For clearer errors. */
+ } else {
+ state = state_next_word;
+ bsdtar->optarg = opt_word;
+ }
+ }
+ }
+
+ /* We're reading a long option, including -W long=arg convention. */
+ if (state == state_long) {
+ /* After this long option, we'll be starting a new word. */
+ state = state_next_word;
+
+ /* Option name ends at '=' if there is one. */
+ p = strchr(opt_word, '=');
+ if (p != NULL) {
+ optlength = (size_t)(p - opt_word);
+ bsdtar->optarg = (char *)(uintptr_t)(p + 1);
+ } else {
+ optlength = strlen(opt_word);
+ }
+
+ /* Search the table for an unambiguous match. */
+ for (popt = tar_longopts; popt->name != NULL; popt++) {
+ /* Short-circuit if first chars don't match. */
+ if (popt->name[0] != opt_word[0])
+ continue;
+ /* If option is a prefix of name in table, record it.*/
+ if (strncmp(opt_word, popt->name, optlength) == 0) {
+ match2 = match; /* Record up to two matches. */
+ match = popt;
+ /* If it's an exact match, we're done. */
+ if (strlen(popt->name) == optlength) {
+ match2 = NULL; /* Forget the others. */
+ break;
+ }
+ }
+ }
+
+ /* Fail if there wasn't a unique match. */
+ if (match == NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Option %s%s is not supported",
+ long_prefix, opt_word);
+ return ('?');
+ }
+ if (match2 != NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Ambiguous option %s%s (matches --%s and --%s)",
+ long_prefix, opt_word, match->name, match2->name);
+ return ('?');
+ }
+
+ /* We've found a unique match; does it need an argument? */
+ if (match->required) {
+ /* Argument required: get next word if necessary. */
+ if (bsdtar->optarg == NULL) {
+ bsdtar->optarg = *bsdtar->argv;
+ if (bsdtar->optarg == NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Option %s%s requires an argument",
+ long_prefix, match->name);
+ return ('?');
+ }
+ ++bsdtar->argv;
+ --bsdtar->argc;
+ }
+ } else {
+ /* Argument forbidden: fail if there is one. */
+ if (bsdtar->optarg != NULL) {
+ bsdtar_warnc(bsdtar, 0,
+ "Option %s%s does not allow an argument",
+ long_prefix, match->name);
+ return ('?');
+ }
+ }
+ return (match->equivalent);
+ }
+
+ return (opt);
+}
projects / thirdparty / libarchive.git / commitdiff
