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-rw-r--r--archivers/libarchive/files/cpio/cmdline.c369
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diff --git a/archivers/libarchive/files/cpio/cmdline.c b/archivers/libarchive/files/cpio/cmdline.c
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-/*-
- * 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
- * in this position and unchanged.
- * 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 "cpio_platform.h"
-__FBSDID("$FreeBSD: src/usr.bin/cpio/cmdline.c,v 1.5 2008/12/06 07:30:40 kientzle Exp $");
-
-#ifdef HAVE_ERRNO_H
-#include <errno.h>
-#endif
-#ifdef HAVE_GRP_H
-#include <grp.h>
-#endif
-#ifdef HAVE_PWD_H
-#include <pwd.h>
-#endif
-#include <stdio.h>
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-
-#include "cpio.h"
-#include "err.h"
-
-/*
- * Short options for cpio. Please keep this sorted.
- */
-static const char *short_options = "0AaBC:cdE:F:f:H:hI:iJjLlmnO:opR:rtuvW:yZz";
-
-/*
- * Long options for cpio. Please keep this sorted.
- */
-static const struct option {
- const char *name;
- int required; /* 1 if this option requires an argument */
- int equivalent; /* Equivalent short option. */
-} cpio_longopts[] = {
- { "create", 0, 'o' },
- { "extract", 0, 'i' },
- { "file", 1, 'F' },
- { "format", 1, 'H' },
- { "help", 0, 'h' },
- { "insecure", 0, OPTION_INSECURE },
- { "link", 0, 'l' },
- { "list", 0, 't' },
- { "lzma", 0, OPTION_LZMA },
- { "make-directories", 0, 'd' },
- { "no-preserve-owner", 0, OPTION_NO_PRESERVE_OWNER },
- { "null", 0, '0' },
- { "numeric-uid-gid", 0, 'n' },
- { "owner", 1, 'R' },
- { "pass-through", 0, 'p' },
- { "preserve-modification-time", 0, 'm' },
- { "preserve-owner", 0, OPTION_PRESERVE_OWNER },
- { "quiet", 0, OPTION_QUIET },
- { "unconditional", 0, 'u' },
- { "verbose", 0, 'v' },
- { "version", 0, OPTION_VERSION },
- { "xz", 0, 'J' },
- { NULL, 0, 0 }
-};
-
-/*
- * I used to try to select platform-provided getopt() or
- * getopt_long(), but that caused a lot of headaches. In particular,
- * I couldn't consistently use long options in the test harness
- * because not all platforms have getopt_long(). That in turn led to
- * overuse of the -W hack in the test harness, which made it rough to
- * run the test harness against GNU cpio. (I periodically run the
- * test harness here against GNU cpio as a sanity-check. Yes,
- * I've found a couple of bugs in GNU cpio that way.)
- */
-int
-cpio_getopt(struct cpio *cpio)
-{
- enum { state_start = 0, 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;
-
- cpio->optarg = NULL;
-
- /* First time through, initialize everything. */
- if (state == state_start) {
- /* Skip program name. */
- ++cpio->argv;
- --cpio->argc;
- state = state_next_word;
- }
-
- /*
- * We're ready to look at the next word in argv.
- */
- if (state == state_next_word) {
- /* No more arguments, so no more options. */
- if (cpio->argv[0] == NULL)
- return (-1);
- /* Doesn't start with '-', so no more options. */
- if (cpio->argv[0][0] != '-')
- return (-1);
- /* "--" marks end of options; consume it and return. */
- if (strcmp(cpio->argv[0], "--") == 0) {
- ++cpio->argv;
- --cpio->argc;
- return (-1);
- }
- /* Get next word for parsing. */
- opt_word = *cpio->argv++;
- --cpio->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 cpio_getopt(cpio);
- }
-
- /* 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 = *cpio->argv;
- if (opt_word == NULL) {
- lafe_warnc(0,
- "Option -%c requires an argument",
- opt);
- return ('?');
- }
- ++cpio->argv;
- --cpio->argc;
- }
- if (opt == 'W') {
- state = state_long;
- long_prefix = "-W "; /* For clearer errors. */
- } else {
- state = state_next_word;
- cpio->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);
- cpio->optarg = (char *)(uintptr_t)(p + 1);
- } else {
- optlength = strlen(opt_word);
- }
-
- /* Search the table for an unambiguous match. */
- for (popt = cpio_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) {
- lafe_warnc(0,
- "Option %s%s is not supported",
- long_prefix, opt_word);
- return ('?');
- }
- if (match2 != NULL) {
- lafe_warnc(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 (cpio->optarg == NULL) {
- cpio->optarg = *cpio->argv;
- if (cpio->optarg == NULL) {
- lafe_warnc(0,
- "Option %s%s requires an argument",
- long_prefix, match->name);
- return ('?');
- }
- ++cpio->argv;
- --cpio->argc;
- }
- } else {
- /* Argument forbidden: fail if there is one. */
- if (cpio->optarg != NULL) {
- lafe_warnc(0,
- "Option %s%s does not allow an argument",
- long_prefix, match->name);
- return ('?');
- }
- }
- return (match->equivalent);
- }
-
- return (opt);
-}
-
-
-/*
- * Parse the argument to the -R or --owner flag.
- *
- * The format is one of the following:
- * <username|uid> - Override user but not group
- * <username>: - Override both, group is user's default group
- * <uid>: - Override user but not group
- * <username|uid>:<groupname|gid> - Override both
- * :<groupname|gid> - Override group but not user
- *
- * Where uid/gid are decimal representations and groupname/username
- * are names to be looked up in system database. Note that we try
- * to look up an argument as a name first, then try numeric parsing.
- *
- * A period can be used instead of the colon.
- *
- * Sets uid/gid return as appropriate, -1 indicates uid/gid not specified.
- *
- * Returns NULL if no error, otherwise returns error string for display.
- *
- */
-const char *
-owner_parse(const char *spec, int *uid, int *gid)
-{
- static char errbuff[128];
- const char *u, *ue, *g;
-
- *uid = -1;
- *gid = -1;
-
- if (spec[0] == '\0')
- return ("Invalid empty user/group spec");
-
- /*
- * Split spec into [user][:.][group]
- * u -> first char of username, NULL if no username
- * ue -> first char after username (colon, period, or \0)
- * g -> first char of group name
- */
- if (*spec == ':' || *spec == '.') {
- /* If spec starts with ':' or '.', then just group. */
- ue = u = NULL;
- g = spec + 1;
- } else {
- /* Otherwise, [user] or [user][:] or [user][:][group] */
- ue = u = spec;
- while (*ue != ':' && *ue != '.' && *ue != '\0')
- ++ue;
- g = ue;
- if (*g != '\0') /* Skip : or . to find first char of group. */
- ++g;
- }
-
- if (u != NULL) {
- /* Look up user: ue is first char after end of user. */
- char *user;
- struct passwd *pwent;
-
- user = (char *)malloc(ue - u + 1);
- if (user == NULL)
- return ("Couldn't allocate memory");
- memcpy(user, u, ue - u);
- user[ue - u] = '\0';
- if ((pwent = getpwnam(user)) != NULL) {
- *uid = pwent->pw_uid;
- if (*ue != '\0')
- *gid = pwent->pw_gid;
- } else {
- char *end;
- errno = 0;
- *uid = strtoul(user, &end, 10);
- if (errno || *end != '\0') {
- snprintf(errbuff, sizeof(errbuff),
- "Couldn't lookup user ``%s''", user);
- errbuff[sizeof(errbuff) - 1] = '\0';
- return (errbuff);
- }
- }
- free(user);
- }
-
- if (*g != '\0') {
- struct group *grp;
- if ((grp = getgrnam(g)) != NULL) {
- *gid = grp->gr_gid;
- } else {
- char *end;
- errno = 0;
- *gid = strtoul(g, &end, 10);
- if (errno || *end != '\0') {
- snprintf(errbuff, sizeof(errbuff),
- "Couldn't lookup group ``%s''", g);
- errbuff[sizeof(errbuff) - 1] = '\0';
- return (errbuff);
- }
- }
- }
- return (NULL);
-}
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