/*-

 * 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/cpio.c,v 1.15 2008/12/06 07:30:40 kientzle Exp $");

#include <sys/types.h>

#include <archive.h>

#include <archive_entry.h>

#ifdef HAVE_SYS_MKDEV_H

#include <sys/mkdev.h>

#endif

#ifdef HAVE_SYS_STAT_H

#include <sys/stat.h>

#endif

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h>

#endif

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_FCNTL_H

#include <fcntl.h>

#endif

#ifdef HAVE_GRP_H

#include <grp.h>

#endif

#ifdef HAVE_LOCALE_H

#include <locale.h>

#endif

#ifdef HAVE_PWD_H

#include <pwd.h>

#endif

#ifdef HAVE_SIGNAL_H

#include <signal.h>

#endif

#ifdef HAVE_STDARG_H

#include <stdarg.h>

#endif

#ifdef HAVE_STDINT_H

#include <stdint.h>

#endif

#include <stdio.h>

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef HAVE_TIME_H

#include <time.h>

#endif

#include "cpio.h"

#include "err.h"

#include "line_reader.h"

#include "passphrase.h"

/* Fixed size of uname/gname caches. */

#define	name_cache_size 101

#ifndef O_BINARY

#define O_BINARY 0

#endif

struct name_cache {

	int	probes;

	int	hits;

	size_t	size;

	struct {

		id_t id;

		char *name;

	} cache[name_cache_size];

};

static int	extract_data(struct archive *, struct archive *);

const char *	cpio_i64toa(int64_t);

static const char *cpio_rename(const char *name);

static int	entry_to_archive(struct cpio *, struct archive_entry *);

static int	file_to_archive(struct cpio *, const char *);

static void	free_cache(struct name_cache *cache);

static void	list_item_verbose(struct cpio *, struct archive_entry *);

static void	long_help(void) __LA_DEAD;

static const char *lookup_gname(struct cpio *, gid_t gid);

static int	lookup_gname_helper(struct cpio *,

		    const char **name, id_t gid);

static const char *lookup_uname(struct cpio *, uid_t uid);

static int	lookup_uname_helper(struct cpio *,

		    const char **name, id_t uid);

static void	mode_in(struct cpio *) __LA_DEAD;

static void	mode_list(struct cpio *) __LA_DEAD;

static void	mode_out(struct cpio *);

static void	mode_pass(struct cpio *, const char *);

static const char *remove_leading_slash(const char *);

static int	restore_time(struct cpio *, struct archive_entry *,

		    const char *, int fd);

static void	usage(void) __LA_DEAD;

static void	version(void) __LA_DEAD;

static const char * passphrase_callback(struct archive *, void *);

static void	passphrase_free(char *);

int

main(int argc, char *argv[])

{

	static char buff[16384];

	struct cpio _cpio; /* Allocated on stack. */

	struct cpio *cpio;

	const char *errmsg;

	int uid, gid;

	int opt;

	cpio = &_cpio;

	memset(cpio, 0, sizeof(*cpio));

	cpio->buff = buff;

	cpio->buff_size = sizeof(buff);

#if defined(HAVE_SIGACTION) && defined(SIGPIPE)

	{ /* Ignore SIGPIPE signals. */

		struct sigaction sa;

		sigemptyset(&sa.sa_mask);

		sa.sa_flags = 0;

		sa.sa_handler = SIG_IGN;

		sigaction(SIGPIPE, &sa, NULL);

	}

#endif

	/* Set lafe_progname before calling lafe_warnc. */

	lafe_setprogname(*argv, "bsdcpio");

#if HAVE_SETLOCALE

	if (setlocale(LC_ALL, "") == NULL)

		lafe_warnc(0, "Failed to set default locale");

#endif

	cpio->uid_override = -1;

	cpio->gid_override = -1;

	cpio->argv = argv;

	cpio->argc = argc;

	cpio->mode = '\0';

	cpio->verbose = 0;

	cpio->compress = '\0';

	cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;

	cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;

	cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;

	cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;

	cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;

	cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;

	cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;

	cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;

#if !defined(_WIN32) && !defined(__CYGWIN__)

	if (geteuid() == 0)

		cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;

#endif

	cpio->bytes_per_block = 512;

	cpio->filename = NULL;

	cpio->matching = archive_match_new();

	if (cpio->matching == NULL)

		lafe_errc(1, 0, "Out of memory");

	while ((opt = cpio_getopt(cpio)) != -1) {

		switch (opt) {

		case '0': /* GNU convention: --null, -0 */

			cpio->option_null = 1;

			break;

		case 'A': /* NetBSD/OpenBSD */

			cpio->option_append = 1;

			break;

		case 'a': /* POSIX 1997 */

			cpio->option_atime_restore = 1;

			break;

		case 'B': /* POSIX 1997 */

			cpio->bytes_per_block = 5120;

			break;

		case OPTION_B64ENCODE:

			cpio->add_filter = opt;

			break;

		case 'C': /* NetBSD/OpenBSD */

			cpio->bytes_per_block = atoi(cpio->argument);

			if (cpio->bytes_per_block <= 0)

				lafe_errc(1, 0, "Invalid blocksize %s", cpio->argument);

			break;

		case 'c': /* POSIX 1997 */

			cpio->format = "odc";

			break;

		case 'd': /* POSIX 1997 */

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;

			break;

		case 'E': /* NetBSD/OpenBSD */

			if (archive_match_include_pattern_from_file(

			    cpio->matching, cpio->argument,

			    cpio->option_null) != ARCHIVE_OK)

				lafe_errc(1, 0, "Error : %s",

				    archive_error_string(cpio->matching));

			break;

		case 'F': /* NetBSD/OpenBSD/GNU cpio */

			cpio->filename = cpio->argument;

			break;

		case 'f': /* POSIX 1997 */

			if (archive_match_exclude_pattern(cpio->matching,

			    cpio->argument) != ARCHIVE_OK)

				lafe_errc(1, 0, "Error : %s",

				    archive_error_string(cpio->matching));

			break;

		case OPTION_GRZIP:

			cpio->compress = opt;

			break;

		case 'H': /* GNU cpio (also --format) */

			cpio->format = cpio->argument;

			break;

		case 'h':

			long_help();

			break;

		case 'I': /* NetBSD/OpenBSD */

			cpio->filename = cpio->argument;

			break;

		case 'i': /* POSIX 1997 */

			if (cpio->mode != '\0')

				lafe_errc(1, 0,

				    "Cannot use both -i and -%c", cpio->mode);

			cpio->mode = opt;

			break;

		case 'J': /* GNU tar, others */

			cpio->compress = opt;

			break;

		case 'j': /* GNU tar, others */

			cpio->compress = opt;

			break;

		case OPTION_INSECURE:

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;

			break;

		case 'L': /* GNU cpio */

			cpio->option_follow_links = 1;

			break;

		case 'l': /* POSIX 1997 */

			cpio->option_link = 1;

			break;

		case OPTION_LRZIP:

		case OPTION_LZ4:

		case OPTION_LZMA: /* GNU tar, others */

		case OPTION_LZOP: /* GNU tar, others */

		case OPTION_ZSTD:

			cpio->compress = opt;

			break;

		case 'm': /* POSIX 1997 */

			cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;

			break;

		case 'n': /* GNU cpio */

			cpio->option_numeric_uid_gid = 1;

			break;

		case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;

			break;

		case 'O': /* GNU cpio */

			cpio->filename = cpio->argument;

			break;

		case 'o': /* POSIX 1997 */

			if (cpio->mode != '\0')

				lafe_errc(1, 0,

				    "Cannot use both -o and -%c", cpio->mode);

			cpio->mode = opt;

			break;

		case 'p': /* POSIX 1997 */

			if (cpio->mode != '\0')

				lafe_errc(1, 0,

				    "Cannot use both -p and -%c", cpio->mode);

			cpio->mode = opt;

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;

			cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;

			break;

		case OPTION_PASSPHRASE:

			cpio->passphrase = cpio->argument;

			break;

		case OPTION_PRESERVE_OWNER:

			cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;

			break;

		case OPTION_QUIET: /* GNU cpio */

			cpio->quiet = 1;

			break;

		case 'R': /* GNU cpio, also --owner */

			/* TODO: owner_parse should return uname/gname

			 * also; use that to set [ug]name_override. */

			errmsg = owner_parse(cpio->argument, &uid, &gid;;

			if (errmsg) {

				lafe_warnc(-1, "%s", errmsg);

				usage();

			}

			if (uid != -1) {

				cpio->uid_override = uid;

				cpio->uname_override = NULL;

			}

			if (gid != -1) {

				cpio->gid_override = gid;

				cpio->gname_override = NULL;

			}

			break;

		case 'r': /* POSIX 1997 */

			cpio->option_rename = 1;

			break;

		case 't': /* POSIX 1997 */

			cpio->option_list = 1;

			break;

		case 'u': /* POSIX 1997 */

			cpio->extract_flags

			    &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;

			break;

		case OPTION_UUENCODE:

			cpio->add_filter = opt;

			break;

		case 'v': /* POSIX 1997 */

			cpio->verbose++;

			break;

		case 'V': /* GNU cpio */

			cpio->dot++;

			break;

		case OPTION_VERSION: /* GNU convention */

			version();

			break;

#if 0

	        /*

		 * cpio_getopt() handles -W specially, so it's not

		 * available here.

		 */

		case 'W': /* Obscure, but useful GNU convention. */

			break;

#endif

		case 'y': /* tar convention */

			cpio->compress = opt;

			break;

		case 'Z': /* tar convention */

			cpio->compress = opt;

			break;

		case 'z': /* tar convention */

			cpio->compress = opt;

			break;

		default:

			usage();

		}

	}

	/*

	 * Sanity-check args, error out on nonsensical combinations.

	 */

	/* -t implies -i if no mode was specified. */

	if (cpio->option_list && cpio->mode == '\0')

		cpio->mode = 'i';

	/* -t requires -i */

	if (cpio->option_list && cpio->mode != 'i')

		lafe_errc(1, 0, "Option -t requires -i");

	/* -n requires -it */

	if (cpio->option_numeric_uid_gid && !cpio->option_list)

		lafe_errc(1, 0, "Option -n requires -it");

	/* Can only specify format when writing */

	if (cpio->format != NULL && cpio->mode != 'o')

		lafe_errc(1, 0, "Option --format requires -o");

	/* -l requires -p */

	if (cpio->option_link && cpio->mode != 'p')

		lafe_errc(1, 0, "Option -l requires -p");

	/* -v overrides -V */

	if (cpio->dot && cpio->verbose)

		cpio->dot = 0;

	/* TODO: Flag other nonsensical combinations. */

	switch (cpio->mode) {

	case 'o':

		/* TODO: Implement old binary format in libarchive,

		   use that here. */

		if (cpio->format == NULL)

			cpio->format = "odc"; /* Default format */

		mode_out(cpio);

		break;

	case 'i':

		while (*cpio->argv != NULL) {

			if (archive_match_include_pattern(cpio->matching,

			    *cpio->argv) != ARCHIVE_OK)

				lafe_errc(1, 0, "Error : %s",

				    archive_error_string(cpio->matching));

			--cpio->argc;

			++cpio->argv;

		}

		if (cpio->option_list)

			mode_list(cpio);

		else

			mode_in(cpio);

		break;

	case 'p':

		if (*cpio->argv == NULL || **cpio->argv == '\0')

			lafe_errc(1, 0,

			    "-p mode requires a target directory");

		mode_pass(cpio, *cpio->argv);

		break;

	default:

		lafe_errc(1, 0,

		    "Must specify at least one of -i, -o, or -p");

	}

	archive_match_free(cpio->matching);

	free_cache(cpio->gname_cache);

	free_cache(cpio->uname_cache);

	free(cpio->destdir);

	passphrase_free(cpio->ppbuff);

	return (cpio->return_value);

}

static void

usage(void)

{

	const char	*p;

	p = lafe_getprogname();

	fprintf(stderr, "Brief Usage:\n");

	fprintf(stderr, "  List:    %s -it < archive\n", p);

	fprintf(stderr, "  Extract: %s -i < archive\n", p);

	fprintf(stderr, "  Create:  %s -o < filenames > archive\n", p);

	fprintf(stderr, "  Help:    %s --help\n", p);

	exit(1);

}

static const char *long_help_msg =

	"First option must be a mode specifier:\n"

	"  -i Input  -o Output  -p Pass\n"

	"Common Options:\n"

	"  -v Verbose filenames     -V  one dot per file\n"

	"Create: %p -o [options]  < [list of files] > [archive]\n"

	"  -J,-y,-z,--lzma  Compress archive with xz/bzip2/gzip/lzma\n"

	"  --format {odc|newc|ustar}  Select archive format\n"

	"List: %p -it < [archive]\n"

	"Extract: %p -i [options] < [archive]\n";

/*

 * Note that the word 'bsdcpio' will always appear in the first line

 * of output.

 *

 * In particular, /bin/sh scripts that need to test for the presence

 * of bsdcpio can use the following template:

 *

 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \

 *          echo bsdcpio; else echo not bsdcpio; fi

 */

static void

long_help(void)

{

	const char	*prog;

	const char	*p;

	prog = lafe_getprogname();

	fflush(stderr);

	p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";

	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 void

version(void)

{

	fprintf(stdout,"bsdcpio %s - %s \n",

	    BSDCPIO_VERSION_STRING,

	    archive_version_details());

	exit(0);

}

static void

mode_out(struct cpio *cpio)

{

	struct archive_entry *entry, *spare;

	struct lafe_line_reader *lr;

	const char *p;

	int r;

	if (cpio->option_append)

		lafe_errc(1, 0, "Append mode not yet supported.");

	cpio->archive_read_disk = archive_read_disk_new();

	if (cpio->archive_read_disk == NULL)

		lafe_errc(1, 0, "Failed to allocate archive object");

	if (cpio->option_follow_links)

		archive_read_disk_set_symlink_logical(cpio->archive_read_disk);

	else

		archive_read_disk_set_symlink_physical(cpio->archive_read_disk);

	archive_read_disk_set_standard_lookup(cpio->archive_read_disk);

	cpio->archive = archive_write_new();

	if (cpio->archive == NULL)

		lafe_errc(1, 0, "Failed to allocate archive object");

	switch (cpio->compress) {

	case OPTION_GRZIP:

		r = archive_write_add_filter_grzip(cpio->archive);

		break;

	case 'J':

		r = archive_write_add_filter_xz(cpio->archive);

		break;

	case OPTION_LRZIP:

		r = archive_write_add_filter_lrzip(cpio->archive);

		break;

	case OPTION_LZ4:

		r = archive_write_add_filter_lz4(cpio->archive);

		break;

	case OPTION_LZMA:

		r = archive_write_add_filter_lzma(cpio->archive);

		break;

	case OPTION_LZOP:

		r = archive_write_add_filter_lzop(cpio->archive);

		break;

	case OPTION_ZSTD:

		r = archive_write_add_filter_zstd(cpio->archive);

		break;

	case 'j': case 'y':

		r = archive_write_add_filter_bzip2(cpio->archive);

		break;

	case 'z':

		r = archive_write_add_filter_gzip(cpio->archive);

		break;

	case 'Z':

		r = archive_write_add_filter_compress(cpio->archive);

		break;

	default:

		r = archive_write_add_filter_none(cpio->archive);

		break;

	}

	if (r < ARCHIVE_WARN)

		lafe_errc(1, 0, "Requested compression not available");

	switch (cpio->add_filter) {

	case 0:

		r = ARCHIVE_OK;

		break;

	case OPTION_B64ENCODE:

		r = archive_write_add_filter_b64encode(cpio->archive);

		break;

	case OPTION_UUENCODE:

		r = archive_write_add_filter_uuencode(cpio->archive);

		break;

	}

	if (r < ARCHIVE_WARN)

		lafe_errc(1, 0, "Requested filter not available");

	r = archive_write_set_format_by_name(cpio->archive, cpio->format);

	if (r != ARCHIVE_OK)

		lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));

	archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block);

	cpio->linkresolver = archive_entry_linkresolver_new();

	archive_entry_linkresolver_set_strategy(cpio->linkresolver,

	    archive_format(cpio->archive));

	if (cpio->passphrase != NULL)

		r = archive_write_set_passphrase(cpio->archive,

			cpio->passphrase);

	else

		r = archive_write_set_passphrase_callback(cpio->archive, cpio,

			&passphrase_callback);

	if (r != ARCHIVE_OK)

		lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));

	/*

	 * The main loop:  Copy each file into the output archive.

	 */

	r = archive_write_open_filename(cpio->archive, cpio->filename);

	if (r != ARCHIVE_OK)

		lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));

	lr = lafe_line_reader("-", cpio->option_null);

	while ((p = lafe_line_reader_next(lr)) != NULL)

		file_to_archive(cpio, p);

	lafe_line_reader_free(lr);

	/*

	 * The hardlink detection may have queued up a couple of entries

	 * that can now be flushed.

	 */

	entry = NULL;

	archive_entry_linkify(cpio->linkresolver, &entry, &spare;;

	while (entry != NULL) {

		entry_to_archive(cpio, entry);

		archive_entry_free(entry);

		entry = NULL;

		archive_entry_linkify(cpio->linkresolver, &entry, &spare;;

	}

	r = archive_write_close(cpio->archive);

	if (cpio->dot)

		fprintf(stderr, "\n");

	if (r != ARCHIVE_OK)

		lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));

	if (!cpio->quiet) {

		int64_t blocks =

			(archive_filter_bytes(cpio->archive, 0) + 511)

			/ 512;

		fprintf(stderr, "%lu %s\n", (unsigned long)blocks,

		    blocks == 1 ? "block" : "blocks");

	}

	archive_write_free(cpio->archive);

	archive_entry_linkresolver_free(cpio->linkresolver);

}

static const char *

remove_leading_slash(const char *p)

{

	const char *rp;

	/* Remove leading "//./" or "//?/" or "//?/UNC/"

	 * (absolute path prefixes used by Windows API) */

	if ((p[0] == '/' || p[0] == '\\') &&

	    (p[1] == '/' || p[1] == '\\') &&

	    (p[2] == '.' || p[2] == '?') &&

	    (p[3] == '/' || p[3] == '\\'))

	{

		if (p[2] == '?' &&

		    (p[4] == 'U' || p[4] == 'u') &&

		    (p[5] == 'N' || p[5] == 'n') &&

		    (p[6] == 'C' || p[6] == 'c') &&

		    (p[7] == '/' || p[7] == '\\'))

			p += 8;

		else

			p += 4;

	}

	do {

		rp = p;

		/* Remove leading drive letter from archives created

		 * on Windows. */

		if (((p[0] >= 'a' && p[0] <= 'z') ||

		     (p[0] >= 'A' && p[0] <= 'Z')) &&

			 p[1] == ':') {

			p += 2;

		}

		/* Remove leading "/../", "//", etc. */

		while (p[0] == '/' || p[0] == '\\') {

			if (p[1] == '.' && p[2] == '.' &&

				(p[3] == '/' || p[3] == '\\')) {

				p += 3; /* Remove "/..", leave "/"

					 * for next pass. */

			} else

				p += 1; /* Remove "/". */

		}

	} while (rp != p);

	return (p);

}

/*

 * This is used by both out mode (to copy objects from disk into

 * an archive) and pass mode (to copy objects from disk to

 * an archive_write_disk "archive").

 */

static int

file_to_archive(struct cpio *cpio, const char *srcpath)

{

	const char *destpath;

	struct archive_entry *entry, *spare;

	size_t len;

	int r;

	/*

	 * Create an archive_entry describing the source file.

	 *

	 */

	entry = archive_entry_new();

	if (entry == NULL)

		lafe_errc(1, 0, "Couldn't allocate entry");

	archive_entry_copy_sourcepath(entry, srcpath);

	r = archive_read_disk_entry_from_file(cpio->archive_read_disk,

	    entry, -1, NULL);

	if (r < ARCHIVE_FAILED)

		lafe_errc(1, 0, "%s",

		    archive_error_string(cpio->archive_read_disk));

	if (r < ARCHIVE_OK)

		lafe_warnc(0, "%s",

		    archive_error_string(cpio->archive_read_disk));

	if (r <= ARCHIVE_FAILED) {

		archive_entry_free(entry);

		cpio->return_value = 1;

		return (r);

	}

	if (cpio->uid_override >= 0) {

		archive_entry_set_uid(entry, cpio->uid_override);

		archive_entry_set_uname(entry, cpio->uname_override);

	}

	if (cpio->gid_override >= 0) {

		archive_entry_set_gid(entry, cpio->gid_override);

		archive_entry_set_gname(entry, cpio->gname_override);

	}

	/*

	 * Generate a destination path for this entry.

	 * "destination path" is the name to which it will be copied in

	 * pass mode or the name that will go into the archive in

	 * output mode.

	 */

	destpath = srcpath;

	if (cpio->destdir) {

		len = strlen(cpio->destdir) + strlen(srcpath) + 8;

		if (len >= cpio->pass_destpath_alloc) {

			while (len >= cpio->pass_destpath_alloc) {

				cpio->pass_destpath_alloc += 512;

				cpio->pass_destpath_alloc *= 2;

			}

			free(cpio->pass_destpath);

			cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);

			if (cpio->pass_destpath == NULL)

				lafe_errc(1, ENOMEM,

				    "Can't allocate path buffer");

		}

		strcpy(cpio->pass_destpath, cpio->destdir);

		strcat(cpio->pass_destpath, remove_leading_slash(srcpath));

		destpath = cpio->pass_destpath;

	}

	if (cpio->option_rename)

		destpath = cpio_rename(destpath);

	if (destpath == NULL)

		return (0);

	archive_entry_copy_pathname(entry, destpath);

	/*

	 * If we're trying to preserve hardlinks, match them here.

	 */

	spare = NULL;

	if (cpio->linkresolver != NULL

	    && archive_entry_filetype(entry) != AE_IFDIR) {

		archive_entry_linkify(cpio->linkresolver, &entry, &spare;;

	}

	if (entry != NULL) {

		r = entry_to_archive(cpio, entry);

		archive_entry_free(entry);

		if (spare != NULL) {

			if (r == 0)

				r = entry_to_archive(cpio, spare);

			archive_entry_free(spare);

		}

	}

	return (r);

}

static int

entry_to_archive(struct cpio *cpio, struct archive_entry *entry)

{

	const char *destpath = archive_entry_pathname(entry);

	const char *srcpath = archive_entry_sourcepath(entry);

	int fd = -1;

	ssize_t bytes_read;

	int r;

	/* Print out the destination name to the user. */

	if (cpio->verbose)

		fprintf(stderr,"%s", destpath);

	if (cpio->dot)

		fprintf(stderr, ".");

	/*

	 * Option_link only makes sense in pass mode and for

	 * regular files.  Also note: if a link operation fails

	 * because of cross-device restrictions, we'll fall back

	 * to copy mode for that entry.

	 *

	 * TODO: Test other cpio implementations to see if they

	 * hard-link anything other than regular files here.

	 */

	if (cpio->option_link

	    && archive_entry_filetype(entry) == AE_IFREG)

	{

		struct archive_entry *t;

		/* Save the original entry in case we need it later. */

		t = archive_entry_clone(entry);

		if (t == NULL)

			lafe_errc(1, ENOMEM, "Can't create link");

		/* Note: link(2) doesn't create parent directories,

		 * so we use archive_write_header() instead as a

		 * convenience. */

		archive_entry_set_hardlink(t, srcpath);

		/* This is a straight link that carries no data. */

		archive_entry_set_size(t, 0);

		r = archive_write_header(cpio->archive, t);

		archive_entry_free(t);

		if (r != ARCHIVE_OK)

			lafe_warnc(archive_errno(cpio->archive),

			    "%s", archive_error_string(cpio->archive));

		if (r == ARCHIVE_FATAL)

			exit(1);

#ifdef EXDEV

		if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {

			/* Cross-device link:  Just fall through and use

			 * the original entry to copy the file over. */

			lafe_warnc(0, "Copying file instead");

		} else

#endif

		return (0);

	}

	/*

	 * Make sure we can open the file (if necessary) before

	 * trying to write the header.

	 */

	if (archive_entry_filetype(entry) == AE_IFREG) {

		if (archive_entry_size(entry) > 0) {

			fd = open(srcpath, O_RDONLY | O_BINARY);

			if (fd < 0) {

				lafe_warnc(errno,

				    "%s: could not open file", srcpath);

				goto cleanup;

			}

		}

	} else {

		archive_entry_set_size(entry, 0);

	}

	r = archive_write_header(cpio->archive, entry);

	if (r != ARCHIVE_OK)

		lafe_warnc(archive_errno(cpio->archive),

		    "%s: %s",

		    srcpath,

		    archive_error_string(cpio->archive));

	if (r == ARCHIVE_FATAL)

		exit(1);

	if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) {

		bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size);

		while (bytes_read > 0) {

			ssize_t bytes_write;

			bytes_write = archive_write_data(cpio->archive,

			    cpio->buff, bytes_read);

			if (bytes_write < 0)

				lafe_errc(1, archive_errno(cpio->archive),

				    "%s", archive_error_string(cpio->archive));

			if (bytes_write < bytes_read) {

				lafe_warnc(0,

				    "Truncated write; file may have "

				    "grown while being archived.");

			}

			bytes_read = read(fd, cpio->buff,

			    (unsigned)cpio->buff_size);

		}

	}

	fd = restore_time(cpio, entry, srcpath, fd);

cleanup: