mirror of
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c459cbeb2b
uname and gname weren't overwritten, so the disk restore would use those to lookup the original uid/gid again. Clearing the uname and gname prevents this. Reported by: swell.k MFC after: 7 days
1278 lines
33 KiB
C
1278 lines
33 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "cpio_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <archive.h>
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#include <archive_entry.h>
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#ifdef HAVE_SYS_MKDEV_H
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#include <sys/mkdev.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#ifdef HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#include "cpio.h"
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#include "err.h"
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#include "line_reader.h"
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#include "matching.h"
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/* Fixed size of uname/gname caches. */
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#define name_cache_size 101
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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struct name_cache {
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int probes;
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int hits;
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size_t size;
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struct {
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id_t id;
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char *name;
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} cache[name_cache_size];
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};
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static int extract_data(struct archive *, struct archive *);
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const char * cpio_i64toa(int64_t);
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static const char *cpio_rename(const char *name);
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static int entry_to_archive(struct cpio *, struct archive_entry *);
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static int file_to_archive(struct cpio *, const char *);
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static void free_cache(struct name_cache *cache);
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static void list_item_verbose(struct cpio *, struct archive_entry *);
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static void long_help(void);
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static const char *lookup_gname(struct cpio *, gid_t gid);
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static int lookup_gname_helper(struct cpio *,
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const char **name, id_t gid);
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static const char *lookup_uname(struct cpio *, uid_t uid);
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static int lookup_uname_helper(struct cpio *,
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const char **name, id_t uid);
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static void mode_in(struct cpio *);
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static void mode_list(struct cpio *);
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static void mode_out(struct cpio *);
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static void mode_pass(struct cpio *, const char *);
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static int restore_time(struct cpio *, struct archive_entry *,
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const char *, int fd);
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static void usage(void);
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static void version(void);
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int
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main(int argc, char *argv[])
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{
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static char buff[16384];
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struct cpio _cpio; /* Allocated on stack. */
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struct cpio *cpio;
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const char *errmsg;
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int uid, gid;
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int opt;
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cpio = &_cpio;
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memset(cpio, 0, sizeof(*cpio));
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cpio->buff = buff;
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cpio->buff_size = sizeof(buff);
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/* Need progname before calling warnc. */
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if (*argv == NULL)
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progname = "bsdcpio";
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else {
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#if defined(_WIN32) && !defined(__CYGWIN__)
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progname = strrchr(*argv, '\\');
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#else
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progname = strrchr(*argv, '/');
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#endif
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if (progname != NULL)
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progname++;
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else
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progname = *argv;
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}
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cpio->uid_override = -1;
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cpio->gid_override = -1;
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cpio->argv = argv;
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cpio->argc = argc;
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cpio->mode = '\0';
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cpio->verbose = 0;
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cpio->compress = '\0';
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cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
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cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
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cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
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cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
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cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
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cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
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#if !defined(_WIN32) && !defined(__CYGWIN__)
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if (geteuid() == 0)
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cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
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#endif
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cpio->bytes_per_block = 512;
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cpio->filename = NULL;
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while ((opt = cpio_getopt(cpio)) != -1) {
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switch (opt) {
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case '0': /* GNU convention: --null, -0 */
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cpio->option_null = 1;
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break;
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case 'A': /* NetBSD/OpenBSD */
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cpio->option_append = 1;
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break;
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case 'a': /* POSIX 1997 */
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cpio->option_atime_restore = 1;
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break;
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case 'B': /* POSIX 1997 */
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cpio->bytes_per_block = 5120;
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break;
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case 'C': /* NetBSD/OpenBSD */
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cpio->bytes_per_block = atoi(cpio->optarg);
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if (cpio->bytes_per_block <= 0)
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errc(1, 0, "Invalid blocksize %s", cpio->optarg);
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break;
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case 'c': /* POSIX 1997 */
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cpio->format = "odc";
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break;
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case 'd': /* POSIX 1997 */
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
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break;
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case 'E': /* NetBSD/OpenBSD */
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include_from_file(&cpio->matching,
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cpio->optarg, cpio->option_null);
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break;
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case 'F': /* NetBSD/OpenBSD/GNU cpio */
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cpio->filename = cpio->optarg;
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break;
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case 'f': /* POSIX 1997 */
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exclude(&cpio->matching, cpio->optarg);
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break;
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case 'H': /* GNU cpio (also --format) */
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cpio->format = cpio->optarg;
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break;
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case 'h':
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long_help();
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break;
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case 'I': /* NetBSD/OpenBSD */
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cpio->filename = cpio->optarg;
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break;
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case 'i': /* POSIX 1997 */
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if (cpio->mode != '\0')
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errc(1, 0,
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"Cannot use both -i and -%c", cpio->mode);
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cpio->mode = opt;
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break;
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case 'J': /* GNU tar, others */
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cpio->compress = opt;
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break;
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case 'j': /* GNU tar, others */
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cpio->compress = opt;
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break;
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case OPTION_INSECURE:
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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break;
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case 'L': /* GNU cpio */
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cpio->option_follow_links = 1;
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break;
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case 'l': /* POSIX 1997 */
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cpio->option_link = 1;
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break;
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case OPTION_LZMA: /* GNU tar, others */
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cpio->compress = opt;
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break;
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case 'm': /* POSIX 1997 */
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cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
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break;
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case 'n': /* GNU cpio */
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cpio->option_numeric_uid_gid = 1;
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break;
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case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
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break;
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case 'O': /* GNU cpio */
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cpio->filename = cpio->optarg;
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break;
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case 'o': /* POSIX 1997 */
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if (cpio->mode != '\0')
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errc(1, 0,
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"Cannot use both -o and -%c", cpio->mode);
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cpio->mode = opt;
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break;
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case 'p': /* POSIX 1997 */
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if (cpio->mode != '\0')
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errc(1, 0,
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"Cannot use both -p and -%c", cpio->mode);
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cpio->mode = opt;
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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break;
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case OPTION_PRESERVE_OWNER:
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cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
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break;
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case OPTION_QUIET: /* GNU cpio */
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cpio->quiet = 1;
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break;
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case 'R': /* GNU cpio, also --owner */
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/* TODO: owner_parse should return uname/gname
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* also; use that to set [ug]name_override. */
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errmsg = owner_parse(cpio->optarg, &uid, &gid);
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if (errmsg) {
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warnc(-1, "%s", errmsg);
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usage();
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}
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if (uid != -1) {
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cpio->uid_override = uid;
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cpio->uname_override = NULL;
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}
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if (gid != -1) {
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cpio->gid_override = gid;
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cpio->gname_override = NULL;
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}
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break;
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case 'r': /* POSIX 1997 */
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cpio->option_rename = 1;
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break;
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case 't': /* POSIX 1997 */
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cpio->option_list = 1;
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break;
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case 'u': /* POSIX 1997 */
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cpio->extract_flags
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&= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
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break;
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case 'v': /* POSIX 1997 */
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cpio->verbose++;
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break;
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case OPTION_VERSION: /* GNU convention */
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version();
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break;
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#if 0
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/*
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* cpio_getopt() handles -W specially, so it's not
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* available here.
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*/
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case 'W': /* Obscure, but useful GNU convention. */
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break;
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#endif
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case 'y': /* tar convention */
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cpio->compress = opt;
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break;
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case 'Z': /* tar convention */
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cpio->compress = opt;
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break;
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case 'z': /* tar convention */
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cpio->compress = opt;
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break;
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default:
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usage();
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}
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}
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/*
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* Sanity-check args, error out on nonsensical combinations.
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*/
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/* -t implies -i if no mode was specified. */
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if (cpio->option_list && cpio->mode == '\0')
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cpio->mode = 'i';
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/* -t requires -i */
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if (cpio->option_list && cpio->mode != 'i')
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errc(1, 0, "Option -t requires -i");
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/* -n requires -it */
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if (cpio->option_numeric_uid_gid && !cpio->option_list)
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errc(1, 0, "Option -n requires -it");
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/* Can only specify format when writing */
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if (cpio->format != NULL && cpio->mode != 'o')
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errc(1, 0, "Option --format requires -o");
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/* -l requires -p */
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if (cpio->option_link && cpio->mode != 'p')
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errc(1, 0, "Option -l requires -p");
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/* TODO: Flag other nonsensical combinations. */
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switch (cpio->mode) {
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case 'o':
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/* TODO: Implement old binary format in libarchive,
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use that here. */
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if (cpio->format == NULL)
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cpio->format = "odc"; /* Default format */
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mode_out(cpio);
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break;
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case 'i':
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while (*cpio->argv != NULL) {
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include(&cpio->matching, *cpio->argv);
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--cpio->argc;
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++cpio->argv;
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}
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if (cpio->option_list)
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mode_list(cpio);
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else
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mode_in(cpio);
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break;
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case 'p':
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if (*cpio->argv == NULL || **cpio->argv == '\0')
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errc(1, 0,
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"-p mode requires a target directory");
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mode_pass(cpio, *cpio->argv);
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break;
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default:
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errc(1, 0,
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"Must specify at least one of -i, -o, or -p");
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}
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free_cache(cpio->gname_cache);
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free_cache(cpio->uname_cache);
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return (cpio->return_value);
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}
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static void
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usage(void)
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{
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const char *p;
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p = progname;
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fprintf(stderr, "Brief Usage:\n");
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fprintf(stderr, " List: %s -it < archive\n", p);
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fprintf(stderr, " Extract: %s -i < archive\n", p);
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fprintf(stderr, " Create: %s -o < filenames > archive\n", p);
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fprintf(stderr, " Help: %s --help\n", p);
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exit(1);
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}
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static const char *long_help_msg =
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"First option must be a mode specifier:\n"
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" -i Input -o Output -p Pass\n"
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"Common Options:\n"
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" -v Verbose\n"
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"Create: %p -o [options] < [list of files] > [archive]\n"
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" -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n"
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" --format {odc|newc|ustar} Select archive format\n"
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"List: %p -it < [archive]\n"
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"Extract: %p -i [options] < [archive]\n";
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/*
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* Note that the word 'bsdcpio' will always appear in the first line
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* of output.
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*
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* In particular, /bin/sh scripts that need to test for the presence
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* of bsdcpio can use the following template:
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*
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* if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \
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* echo bsdcpio; else echo not bsdcpio; fi
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*/
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static void
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long_help(void)
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{
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const char *prog;
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const char *p;
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prog = progname;
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fflush(stderr);
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p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";
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printf("%s%s: manipulate archive files\n", prog, p);
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for (p = long_help_msg; *p != '\0'; p++) {
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if (*p == '%') {
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if (p[1] == 'p') {
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fputs(prog, stdout);
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p++;
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} else
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putchar('%');
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} else
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putchar(*p);
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}
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version();
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}
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static void
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version(void)
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{
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fprintf(stdout,"bsdcpio %s -- %s\n",
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BSDCPIO_VERSION_STRING,
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archive_version());
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exit(0);
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}
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static void
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mode_out(struct cpio *cpio)
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{
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struct archive_entry *entry, *spare;
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struct line_reader *lr;
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const char *p;
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int r;
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if (cpio->option_append)
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errc(1, 0, "Append mode not yet supported.");
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cpio->archive_read_disk = archive_read_disk_new();
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if (cpio->archive_read_disk == NULL)
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errc(1, 0, "Failed to allocate archive object");
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if (cpio->option_follow_links)
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archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
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else
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archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
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archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
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cpio->archive = archive_write_new();
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if (cpio->archive == NULL)
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errc(1, 0, "Failed to allocate archive object");
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switch (cpio->compress) {
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case 'J':
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r = archive_write_set_compression_xz(cpio->archive);
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break;
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case OPTION_LZMA:
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r = archive_write_set_compression_lzma(cpio->archive);
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break;
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case 'j': case 'y':
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r = archive_write_set_compression_bzip2(cpio->archive);
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break;
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case 'z':
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r = archive_write_set_compression_gzip(cpio->archive);
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break;
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case 'Z':
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r = archive_write_set_compression_compress(cpio->archive);
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break;
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default:
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r = archive_write_set_compression_none(cpio->archive);
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break;
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}
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if (r < ARCHIVE_WARN)
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errc(1, 0, "Requested compression not available");
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r = archive_write_set_format_by_name(cpio->archive, cpio->format);
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|
if (r != ARCHIVE_OK)
|
|
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));
|
|
|
|
/*
|
|
* The main loop: Copy each file into the output archive.
|
|
*/
|
|
r = archive_write_open_file(cpio->archive, cpio->filename);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(cpio->archive));
|
|
lr = line_reader("-", cpio->option_null);
|
|
while ((p = line_reader_next(lr)) != NULL)
|
|
file_to_archive(cpio, p);
|
|
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 (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(cpio->archive));
|
|
|
|
if (!cpio->quiet) {
|
|
int64_t blocks =
|
|
(archive_position_uncompressed(cpio->archive) + 511)
|
|
/ 512;
|
|
fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
|
|
blocks == 1 ? "block" : "blocks");
|
|
}
|
|
archive_write_finish(cpio->archive);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
const char *p;
|
|
int r;
|
|
|
|
/*
|
|
* Create an archive_entry describing the source file.
|
|
*
|
|
*/
|
|
entry = archive_entry_new();
|
|
if (entry == NULL)
|
|
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)
|
|
errc(1, 0, "%s",
|
|
archive_error_string(cpio->archive_read_disk));
|
|
if (r < ARCHIVE_OK)
|
|
warnc(0, "%s",
|
|
archive_error_string(cpio->archive_read_disk));
|
|
if (r <= ARCHIVE_FAILED) {
|
|
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)
|
|
errc(1, ENOMEM,
|
|
"Can't allocate path buffer");
|
|
}
|
|
strcpy(cpio->pass_destpath, cpio->destdir);
|
|
p = srcpath;
|
|
while (p[0] == '/')
|
|
++p;
|
|
strcat(cpio->pass_destpath, p);
|
|
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);
|
|
|
|
/*
|
|
* 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)
|
|
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)
|
|
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. */
|
|
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) {
|
|
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)
|
|
warnc(archive_errno(cpio->archive),
|
|
"%s: %s",
|
|
srcpath,
|
|
archive_error_string(cpio->archive));
|
|
|
|
if (r == ARCHIVE_FATAL)
|
|
exit(1);
|
|
|
|
if (r >= ARCHIVE_WARN && fd >= 0) {
|
|
bytes_read = read(fd, cpio->buff, cpio->buff_size);
|
|
while (bytes_read > 0) {
|
|
r = archive_write_data(cpio->archive,
|
|
cpio->buff, bytes_read);
|
|
if (r < 0)
|
|
errc(1, archive_errno(cpio->archive),
|
|
"%s", archive_error_string(cpio->archive));
|
|
if (r < bytes_read) {
|
|
warnc(0,
|
|
"Truncated write; file may have grown while being archived.");
|
|
}
|
|
bytes_read = read(fd, cpio->buff, cpio->buff_size);
|
|
}
|
|
}
|
|
|
|
fd = restore_time(cpio, entry, srcpath, fd);
|
|
|
|
cleanup:
|
|
if (cpio->verbose)
|
|
fprintf(stderr,"\n");
|
|
if (fd >= 0)
|
|
close(fd);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
restore_time(struct cpio *cpio, struct archive_entry *entry,
|
|
const char *name, int fd)
|
|
{
|
|
#ifndef HAVE_UTIMES
|
|
static int warned = 0;
|
|
|
|
(void)cpio; /* UNUSED */
|
|
(void)entry; /* UNUSED */
|
|
(void)name; /* UNUSED */
|
|
|
|
if (!warned)
|
|
warnc(0, "Can't restore access times on this platform");
|
|
warned = 1;
|
|
return (fd);
|
|
#else
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
struct __timeval times[2];
|
|
#else
|
|
struct timeval times[2];
|
|
#endif
|
|
|
|
if (!cpio->option_atime_restore)
|
|
return (fd);
|
|
|
|
times[1].tv_sec = archive_entry_mtime(entry);
|
|
times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
|
|
|
|
times[0].tv_sec = archive_entry_atime(entry);
|
|
times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
|
|
|
|
#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
|
|
if (fd >= 0 && futimes(fd, times) == 0)
|
|
return (fd);
|
|
#endif
|
|
/*
|
|
* Some platform cannot restore access times if the file descriptor
|
|
* is still opened.
|
|
*/
|
|
if (fd >= 0) {
|
|
close(fd);
|
|
fd = -1;
|
|
}
|
|
|
|
#ifdef HAVE_LUTIMES
|
|
if (lutimes(name, times) != 0)
|
|
#else
|
|
if ((AE_IFLNK != archive_entry_filetype(entry))
|
|
&& utimes(name, times) != 0)
|
|
#endif
|
|
warnc(errno, "Can't update time for %s", name);
|
|
#endif
|
|
return (fd);
|
|
}
|
|
|
|
|
|
static void
|
|
mode_in(struct cpio *cpio)
|
|
{
|
|
struct archive *a;
|
|
struct archive_entry *entry;
|
|
struct archive *ext;
|
|
const char *destpath;
|
|
int r;
|
|
|
|
ext = archive_write_disk_new();
|
|
if (ext == NULL)
|
|
errc(1, 0, "Couldn't allocate restore object");
|
|
r = archive_write_disk_set_options(ext, cpio->extract_flags);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(ext));
|
|
a = archive_read_new();
|
|
if (a == NULL)
|
|
errc(1, 0, "Couldn't allocate archive object");
|
|
archive_read_support_compression_all(a);
|
|
archive_read_support_format_all(a);
|
|
|
|
if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
|
|
errc(1, archive_errno(a),
|
|
"%s", archive_error_string(a));
|
|
for (;;) {
|
|
r = archive_read_next_header(a, &entry);
|
|
if (r == ARCHIVE_EOF)
|
|
break;
|
|
if (r != ARCHIVE_OK) {
|
|
errc(1, archive_errno(a),
|
|
"%s", archive_error_string(a));
|
|
}
|
|
if (excluded(cpio->matching, archive_entry_pathname(entry)))
|
|
continue;
|
|
if (cpio->option_rename) {
|
|
destpath = cpio_rename(archive_entry_pathname(entry));
|
|
archive_entry_set_pathname(entry, destpath);
|
|
} else
|
|
destpath = archive_entry_pathname(entry);
|
|
if (destpath == NULL)
|
|
continue;
|
|
if (cpio->verbose)
|
|
fprintf(stdout, "%s\n", destpath);
|
|
if (cpio->uid_override >= 0)
|
|
archive_entry_set_uid(entry, cpio->uid_override);
|
|
if (cpio->gid_override >= 0)
|
|
archive_entry_set_gid(entry, cpio->gid_override);
|
|
r = archive_write_header(ext, entry);
|
|
if (r != ARCHIVE_OK) {
|
|
fprintf(stderr, "%s: %s\n",
|
|
archive_entry_pathname(entry),
|
|
archive_error_string(ext));
|
|
} else if (archive_entry_size(entry) > 0) {
|
|
r = extract_data(a, ext);
|
|
if (r != ARCHIVE_OK)
|
|
cpio->return_value = 1;
|
|
}
|
|
}
|
|
r = archive_read_close(a);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(a));
|
|
r = archive_write_close(ext);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(ext));
|
|
if (!cpio->quiet) {
|
|
int64_t blocks = (archive_position_uncompressed(a) + 511)
|
|
/ 512;
|
|
fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
|
|
blocks == 1 ? "block" : "blocks");
|
|
}
|
|
archive_read_finish(a);
|
|
archive_write_finish(ext);
|
|
exit(cpio->return_value);
|
|
}
|
|
|
|
/*
|
|
* Exits if there's a fatal error. Returns ARCHIVE_OK
|
|
* if everything is kosher.
|
|
*/
|
|
static int
|
|
extract_data(struct archive *ar, struct archive *aw)
|
|
{
|
|
int r;
|
|
size_t size;
|
|
const void *block;
|
|
off_t offset;
|
|
|
|
for (;;) {
|
|
r = archive_read_data_block(ar, &block, &size, &offset);
|
|
if (r == ARCHIVE_EOF)
|
|
return (ARCHIVE_OK);
|
|
if (r != ARCHIVE_OK) {
|
|
warnc(archive_errno(ar),
|
|
"%s", archive_error_string(ar));
|
|
exit(1);
|
|
}
|
|
r = archive_write_data_block(aw, block, size, offset);
|
|
if (r != ARCHIVE_OK) {
|
|
warnc(archive_errno(aw),
|
|
"%s", archive_error_string(aw));
|
|
return (r);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
mode_list(struct cpio *cpio)
|
|
{
|
|
struct archive *a;
|
|
struct archive_entry *entry;
|
|
int r;
|
|
|
|
a = archive_read_new();
|
|
if (a == NULL)
|
|
errc(1, 0, "Couldn't allocate archive object");
|
|
archive_read_support_compression_all(a);
|
|
archive_read_support_format_all(a);
|
|
|
|
if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block))
|
|
errc(1, archive_errno(a),
|
|
"%s", archive_error_string(a));
|
|
for (;;) {
|
|
r = archive_read_next_header(a, &entry);
|
|
if (r == ARCHIVE_EOF)
|
|
break;
|
|
if (r != ARCHIVE_OK) {
|
|
errc(1, archive_errno(a),
|
|
"%s", archive_error_string(a));
|
|
}
|
|
if (excluded(cpio->matching, archive_entry_pathname(entry)))
|
|
continue;
|
|
if (cpio->verbose)
|
|
list_item_verbose(cpio, entry);
|
|
else
|
|
fprintf(stdout, "%s\n", archive_entry_pathname(entry));
|
|
}
|
|
r = archive_read_close(a);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(a));
|
|
if (!cpio->quiet) {
|
|
int64_t blocks = (archive_position_uncompressed(a) + 511)
|
|
/ 512;
|
|
fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
|
|
blocks == 1 ? "block" : "blocks");
|
|
}
|
|
archive_read_finish(a);
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Display information about the current file.
|
|
*
|
|
* The format here roughly duplicates the output of 'ls -l'.
|
|
* This is based on SUSv2, where 'tar tv' is documented as
|
|
* listing additional information in an "unspecified format,"
|
|
* and 'pax -l' is documented as using the same format as 'ls -l'.
|
|
*/
|
|
static void
|
|
list_item_verbose(struct cpio *cpio, struct archive_entry *entry)
|
|
{
|
|
char size[32];
|
|
char date[32];
|
|
char uids[16], gids[16];
|
|
const char *uname, *gname;
|
|
FILE *out = stdout;
|
|
const char *fmt;
|
|
time_t mtime;
|
|
static time_t now;
|
|
|
|
if (!now)
|
|
time(&now);
|
|
|
|
if (cpio->option_numeric_uid_gid) {
|
|
/* Format numeric uid/gid for display. */
|
|
strcpy(uids, cpio_i64toa(archive_entry_uid(entry)));
|
|
uname = uids;
|
|
strcpy(gids, cpio_i64toa(archive_entry_gid(entry)));
|
|
gname = gids;
|
|
} else {
|
|
/* Use uname if it's present, else lookup name from uid. */
|
|
uname = archive_entry_uname(entry);
|
|
if (uname == NULL)
|
|
uname = lookup_uname(cpio, archive_entry_uid(entry));
|
|
/* Use gname if it's present, else lookup name from gid. */
|
|
gname = archive_entry_gname(entry);
|
|
if (gname == NULL)
|
|
gname = lookup_gname(cpio, archive_entry_gid(entry));
|
|
}
|
|
|
|
/* Print device number or file size. */
|
|
if (archive_entry_filetype(entry) == AE_IFCHR
|
|
|| archive_entry_filetype(entry) == AE_IFBLK) {
|
|
snprintf(size, sizeof(size), "%lu,%lu",
|
|
(unsigned long)archive_entry_rdevmajor(entry),
|
|
(unsigned long)archive_entry_rdevminor(entry));
|
|
} else {
|
|
strcpy(size, cpio_i64toa(archive_entry_size(entry)));
|
|
}
|
|
|
|
/* Format the time using 'ls -l' conventions. */
|
|
mtime = archive_entry_mtime(entry);
|
|
#if defined(_WIN32) && !defined(__CYGWIN__)
|
|
/* Windows' strftime function does not support %e format. */
|
|
if (mtime - now > 365*86400/2
|
|
|| mtime - now < -365*86400/2)
|
|
fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y";
|
|
else
|
|
fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M";
|
|
#else
|
|
if (abs(mtime - now) > (365/2)*86400)
|
|
fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y";
|
|
else
|
|
fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M";
|
|
#endif
|
|
strftime(date, sizeof(date), fmt, localtime(&mtime));
|
|
|
|
fprintf(out, "%s%3d %-8s %-8s %8s %12s %s",
|
|
archive_entry_strmode(entry),
|
|
archive_entry_nlink(entry),
|
|
uname, gname, size, date,
|
|
archive_entry_pathname(entry));
|
|
|
|
/* Extra information for links. */
|
|
if (archive_entry_hardlink(entry)) /* Hard link */
|
|
fprintf(out, " link to %s", archive_entry_hardlink(entry));
|
|
else if (archive_entry_symlink(entry)) /* Symbolic link */
|
|
fprintf(out, " -> %s", archive_entry_symlink(entry));
|
|
fprintf(out, "\n");
|
|
}
|
|
|
|
static void
|
|
mode_pass(struct cpio *cpio, const char *destdir)
|
|
{
|
|
struct line_reader *lr;
|
|
const char *p;
|
|
int r;
|
|
|
|
/* Ensure target dir has a trailing '/' to simplify path surgery. */
|
|
cpio->destdir = malloc(strlen(destdir) + 8);
|
|
strcpy(cpio->destdir, destdir);
|
|
if (destdir[strlen(destdir) - 1] != '/')
|
|
strcat(cpio->destdir, "/");
|
|
|
|
cpio->archive = archive_write_disk_new();
|
|
if (cpio->archive == NULL)
|
|
errc(1, 0, "Failed to allocate archive object");
|
|
r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(cpio->archive));
|
|
cpio->linkresolver = archive_entry_linkresolver_new();
|
|
archive_write_disk_set_standard_lookup(cpio->archive);
|
|
|
|
cpio->archive_read_disk = archive_read_disk_new();
|
|
if (cpio->archive_read_disk == NULL)
|
|
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);
|
|
|
|
lr = line_reader("-", cpio->option_null);
|
|
while ((p = line_reader_next(lr)) != NULL)
|
|
file_to_archive(cpio, p);
|
|
line_reader_free(lr);
|
|
|
|
archive_entry_linkresolver_free(cpio->linkresolver);
|
|
r = archive_write_close(cpio->archive);
|
|
if (r != ARCHIVE_OK)
|
|
errc(1, 0, "%s", archive_error_string(cpio->archive));
|
|
|
|
if (!cpio->quiet) {
|
|
int64_t blocks =
|
|
(archive_position_uncompressed(cpio->archive) + 511)
|
|
/ 512;
|
|
fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
|
|
blocks == 1 ? "block" : "blocks");
|
|
}
|
|
|
|
archive_write_finish(cpio->archive);
|
|
}
|
|
|
|
/*
|
|
* Prompt for a new name for this entry. Returns a pointer to the
|
|
* new name or NULL if the entry should not be copied. This
|
|
* implements the semantics defined in POSIX.1-1996, which specifies
|
|
* that an input of '.' means the name should be unchanged. GNU cpio
|
|
* treats '.' as a literal new name.
|
|
*/
|
|
static const char *
|
|
cpio_rename(const char *name)
|
|
{
|
|
static char buff[1024];
|
|
FILE *t;
|
|
char *p, *ret;
|
|
|
|
t = fopen("/dev/tty", "r+");
|
|
if (t == NULL)
|
|
return (name);
|
|
fprintf(t, "%s (Enter/./(new name))? ", name);
|
|
fflush(t);
|
|
|
|
p = fgets(buff, sizeof(buff), t);
|
|
fclose(t);
|
|
if (p == NULL)
|
|
/* End-of-file is a blank line. */
|
|
return (NULL);
|
|
|
|
while (*p == ' ' || *p == '\t')
|
|
++p;
|
|
if (*p == '\n' || *p == '\0')
|
|
/* Empty line. */
|
|
return (NULL);
|
|
if (*p == '.' && p[1] == '\n')
|
|
/* Single period preserves original name. */
|
|
return (name);
|
|
ret = p;
|
|
/* Trim the final newline. */
|
|
while (*p != '\0' && *p != '\n')
|
|
++p;
|
|
/* Overwrite the final \n with a null character. */
|
|
*p = '\0';
|
|
return (ret);
|
|
}
|
|
|
|
static void
|
|
free_cache(struct name_cache *cache)
|
|
{
|
|
size_t i;
|
|
|
|
if (cache != NULL) {
|
|
for (i = 0; i < cache->size; i++)
|
|
free(cache->cache[i].name);
|
|
free(cache);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lookup uname/gname from uid/gid, return NULL if no match.
|
|
*/
|
|
static const char *
|
|
lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable,
|
|
int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id)
|
|
{
|
|
char asnum[16];
|
|
struct name_cache *cache;
|
|
const char *name;
|
|
int slot;
|
|
|
|
|
|
if (*name_cache_variable == NULL) {
|
|
*name_cache_variable = malloc(sizeof(struct name_cache));
|
|
if (*name_cache_variable == NULL)
|
|
errc(1, ENOMEM, "No more memory");
|
|
memset(*name_cache_variable, 0, sizeof(struct name_cache));
|
|
(*name_cache_variable)->size = name_cache_size;
|
|
}
|
|
|
|
cache = *name_cache_variable;
|
|
cache->probes++;
|
|
|
|
slot = id % cache->size;
|
|
if (cache->cache[slot].name != NULL) {
|
|
if (cache->cache[slot].id == id) {
|
|
cache->hits++;
|
|
return (cache->cache[slot].name);
|
|
}
|
|
free(cache->cache[slot].name);
|
|
cache->cache[slot].name = NULL;
|
|
}
|
|
|
|
if (lookup_fn(cpio, &name, id) == 0) {
|
|
if (name == NULL || name[0] == '\0') {
|
|
/* If lookup failed, format it as a number. */
|
|
snprintf(asnum, sizeof(asnum), "%u", (unsigned)id);
|
|
name = asnum;
|
|
}
|
|
cache->cache[slot].name = strdup(name);
|
|
if (cache->cache[slot].name != NULL) {
|
|
cache->cache[slot].id = id;
|
|
return (cache->cache[slot].name);
|
|
}
|
|
/*
|
|
* Conveniently, NULL marks an empty slot, so
|
|
* if the strdup() fails, we've just failed to
|
|
* cache it. No recovery necessary.
|
|
*/
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static const char *
|
|
lookup_uname(struct cpio *cpio, uid_t uid)
|
|
{
|
|
return (lookup_name(cpio, &cpio->uname_cache,
|
|
&lookup_uname_helper, (id_t)uid));
|
|
}
|
|
|
|
static int
|
|
lookup_uname_helper(struct cpio *cpio, const char **name, id_t id)
|
|
{
|
|
struct passwd *pwent;
|
|
|
|
(void)cpio; /* UNUSED */
|
|
|
|
errno = 0;
|
|
pwent = getpwuid((uid_t)id);
|
|
if (pwent == NULL) {
|
|
*name = NULL;
|
|
if (errno != 0 && errno != ENOENT)
|
|
warnc(errno, "getpwuid(%d) failed", id);
|
|
return (errno);
|
|
}
|
|
|
|
*name = pwent->pw_name;
|
|
return (0);
|
|
}
|
|
|
|
static const char *
|
|
lookup_gname(struct cpio *cpio, gid_t gid)
|
|
{
|
|
return (lookup_name(cpio, &cpio->gname_cache,
|
|
&lookup_gname_helper, (id_t)gid));
|
|
}
|
|
|
|
static int
|
|
lookup_gname_helper(struct cpio *cpio, const char **name, id_t id)
|
|
{
|
|
struct group *grent;
|
|
|
|
(void)cpio; /* UNUSED */
|
|
|
|
errno = 0;
|
|
grent = getgrgid((gid_t)id);
|
|
if (grent == NULL) {
|
|
*name = NULL;
|
|
if (errno != 0)
|
|
warnc(errno, "getgrgid(%d) failed", id);
|
|
return (errno);
|
|
}
|
|
|
|
*name = grent->gr_name;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* It would be nice to just use printf() for formatting large numbers,
|
|
* but the compatibility problems are a big headache. Hence the
|
|
* following simple utility function.
|
|
*/
|
|
const char *
|
|
cpio_i64toa(int64_t n0)
|
|
{
|
|
// 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice.
|
|
// We also need 1 byte for '-' and 1 for '\0'.
|
|
static char buff[22];
|
|
int64_t n = n0 < 0 ? -n0 : n0;
|
|
char *p = buff + sizeof(buff);
|
|
|
|
*--p = '\0';
|
|
do {
|
|
*--p = '0' + (int)(n % 10);
|
|
n /= 10;
|
|
} while (n > 0);
|
|
if (n0 < 0)
|
|
*--p = '-';
|
|
return p;
|
|
}
|