--- /dev/null
+/*-
+ * 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.
+ *
+ * $FreeBSD: src/usr.bin/tar/bsdtar_platform.h,v 1.26 2008/12/06 07:37:14 kientzle Exp $
+ */
+
+/*
+ * This header is the first thing included in any of the bsdtar
+ * source files. As far as possible, platform-specific issues should
+ * be dealt with here and not within individual source files.
+ */
+
+#ifndef BSDCAT_PLATFORM_H_INCLUDED
+#define BSDCAT_PLATFORM_H_INCLUDED
+
+#if defined(PLATFORM_CONFIG_H)
+/* Use hand-built config.h in environments that need it. */
+#include PLATFORM_CONFIG_H
+#else
+/* Not having a config.h of some sort is a serious problem. */
+#include "config.h"
+#endif
+
+/* Get a real definition for __FBSDID if we can */
+#if HAVE_SYS_CDEFS_H
+#include <sys/cdefs.h>
+#endif
+
+/* If not, define it so as to avoid dangling semicolons. */
+#ifndef __FBSDID
+#define __FBSDID(a) struct _undefined_hack
+#endif
+
+#ifdef HAVE_LIBARCHIVE
+/* If we're using the platform libarchive, include system headers. */
+#include <archive.h>
+#include <archive_entry.h>
+#else
+/* Otherwise, include user headers. */
+#include "archive.h"
+#include "archive_entry.h"
+#endif
+
+/* How to mark functions that don't return. */
+/* This facilitates use of some newer static code analysis tools. */
+#undef __LA_DEAD
+#if defined(__GNUC__) && (__GNUC__ > 2 || \
+ (__GNUC__ == 2 && __GNUC_MINOR__ >= 5))
+#define __LA_DEAD __attribute__((__noreturn__))
+#else
+#define __LA_DEAD
+#endif
+
+#endif /* !BSDCAT_PLATFORM_H_INCLUDED */
--- /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 "bsdcat_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 "bsdcat.h"
+#include "err.h"
+
+/*
+ * Short options for tar. Please keep this sorted.
+ */
+static const char *short_options = "h";
+
+/*
+ * Long options for tar. Please keep this list sorted.
+ *
+ * The symbolic names for options that lack a short equivalent are
+ * defined in bsdcat.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 const struct bsdcat_option {
+ const char *name;
+ int required; /* 1 if this option requires an argument. */
+ int equivalent; /* Equivalent short option. */
+} tar_longopts[] = {
+ { "help", 0, 'h' },
+ { "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 bsdcat. (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 bsdcat 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
+ * bsdcat.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/argc. I'm not really sure if I
+ * like that feature of GNU tar, so it's certainly not a priority.
+ */
+
+int
+bsdcat_getopt(struct bsdcat *bsdcat)
+{
+ enum { state_start = 0, state_old_tar, state_next_word,
+ state_short, state_long };
+
+ const struct bsdcat_option *popt, *match = NULL, *match2 = NULL;
+ const char *p, *long_prefix = "--";
+ size_t optlength;
+ int opt = '?';
+ int required = 0;
+
+ bsdcat->argument = NULL;
+
+ /* First time through, initialize everything. */
+ if (bsdcat->getopt_state == state_start) {
+ /* Skip program name. */
+ ++bsdcat->argv;
+ --bsdcat->argc;
+ if (*bsdcat->argv == NULL)
+ return (-1);
+ /* Decide between "new style" and "old style" arguments. */
+ bsdcat->getopt_state = state_next_word;
+ }
+
+ /*
+ * We're ready to look at the next word in argv.
+ */
+ if (bsdcat->getopt_state == state_next_word) {
+ /* No more arguments, so no more options. */
+ if (bsdcat->argv[0] == NULL)
+ return (-1);
+ /* Doesn't start with '-', so no more options. */
+ if (bsdcat->argv[0][0] != '-')
+ return (-1);
+ /* "--" marks end of options; consume it and return. */
+ if (strcmp(bsdcat->argv[0], "--") == 0) {
+ ++bsdcat->argv;
+ --bsdcat->argc;
+ return (-1);
+ }
+ /* Get next word for parsing. */
+ bsdcat->getopt_word = *bsdcat->argv++;
+ --bsdcat->argc;
+ if (bsdcat->getopt_word[1] == '-') {
+ /* Set up long option parser. */
+ bsdcat->getopt_state = state_long;
+ bsdcat->getopt_word += 2; /* Skip leading '--' */
+ } else {
+ /* Set up short option parser. */
+ bsdcat->getopt_state = state_short;
+ ++bsdcat->getopt_word; /* Skip leading '-' */
+ }
+ }
+
+ /*
+ * We're parsing a group of POSIX-style single-character options.
+ */
+ if (bsdcat->getopt_state == state_short) {
+ /* Peel next option off of a group of short options. */
+ opt = *bsdcat->getopt_word++;
+ if (opt == '\0') {
+ /* End of this group; recurse to get next option. */
+ bsdcat->getopt_state = state_next_word;
+ return bsdcat_getopt(bsdcat);
+ }
+
+ /* 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, bsdcat->getopt_word already points to it. */
+ if (bsdcat->getopt_word[0] == '\0') {
+ /* Otherwise, pick up the next word. */
+ bsdcat->getopt_word = *bsdcat->argv;
+ if (bsdcat->getopt_word == NULL) {
+ lafe_warnc(0,
+ "Option -%c requires an argument",
+ opt);
+ return ('?');
+ }
+ ++bsdcat->argv;
+ --bsdcat->argc;
+ }
+ if (opt == 'W') {
+ bsdcat->getopt_state = state_long;
+ long_prefix = "-W "; /* For clearer errors. */
+ } else {
+ bsdcat->getopt_state = state_next_word;
+ bsdcat->argument = bsdcat->getopt_word;
+ }
+ }
+ }
+
+ /* We're reading a long option, including -W long=arg convention. */
+ if (bsdcat->getopt_state == state_long) {
+ /* After this long option, we'll be starting a new word. */
+ bsdcat->getopt_state = state_next_word;
+
+ /* Option name ends at '=' if there is one. */
+ p = strchr(bsdcat->getopt_word, '=');
+ if (p != NULL) {
+ optlength = (size_t)(p - bsdcat->getopt_word);
+ bsdcat->argument = (char *)(uintptr_t)(p + 1);
+ } else {
+ optlength = strlen(bsdcat->getopt_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] != bsdcat->getopt_word[0])
+ continue;
+ /* If option is a prefix of name in table, record it.*/
+ if (strncmp(bsdcat->getopt_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) {
+ lafe_warnc(0,
+ "Option %s%s is not supported",
+ long_prefix, bsdcat->getopt_word);
+ return ('?');
+ }
+ if (match2 != NULL) {
+ lafe_warnc(0,
+ "Ambiguous option %s%s (matches --%s and --%s)",
+ long_prefix, bsdcat->getopt_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 (bsdcat->argument == NULL) {
+ bsdcat->argument = *bsdcat->argv;
+ if (bsdcat->argument == NULL) {
+ lafe_warnc(0,
+ "Option %s%s requires an argument",
+ long_prefix, match->name);
+ return ('?');
+ }
+ ++bsdcat->argv;
+ --bsdcat->argc;
+ }
+ } else {
+ /* Argument forbidden: fail if there is one. */
+ if (bsdcat->argument != NULL) {
+ lafe_warnc(0,
+ "Option %s%s does not allow an argument",
+ long_prefix, match->name);
+ return ('?');
+ }
+ }
+ return (match->equivalent);
+ }
+
+ return (opt);
+}
projects / thirdparty / libarchive.git / commitdiff
