1ac17adabf
Thanks to: Stefan Farfeleder
1438 lines
38 KiB
C
1438 lines
38 KiB
C
/*-
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* Copyright (c) 2003-2004 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 "bsdtar_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <sys/types.h>
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#ifdef HAVE_POSIX_ACL
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#include <sys/acl.h>
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#endif
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#ifdef HAVE_ATTR_XATTR_H
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#include <attr/xattr.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <grp.h>
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#include <limits.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef __linux
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#include <ext2fs/ext2_fs.h>
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#include <sys/ioctl.h>
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#endif
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#include "bsdtar.h"
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#include "tree.h"
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/* Fixed size of uname/gname caches. */
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#define name_cache_size 101
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static const char * const NO_NAME = "(noname)";
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/* Initial size of link cache. */
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#define links_cache_initial_size 1024
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struct archive_dir_entry {
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struct archive_dir_entry *next;
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time_t mtime_sec;
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int mtime_nsec;
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char *name;
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};
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struct archive_dir {
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struct archive_dir_entry *head, *tail;
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};
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struct links_cache {
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unsigned long number_entries;
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size_t number_buckets;
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struct links_entry **buckets;
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};
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struct links_entry {
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struct links_entry *next;
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struct links_entry *previous;
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int links;
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dev_t dev;
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ino_t ino;
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char *name;
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};
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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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const char *name;
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} cache[name_cache_size];
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};
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static void add_dir_list(struct bsdtar *bsdtar, const char *path,
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time_t mtime_sec, int mtime_nsec);
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static int append_archive(struct bsdtar *, struct archive *,
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const char *fname);
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static void archive_names_from_file(struct bsdtar *bsdtar,
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struct archive *a);
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static int archive_names_from_file_helper(struct bsdtar *bsdtar,
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const char *line);
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static void create_cleanup(struct bsdtar *);
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static void free_buckets(struct bsdtar *, struct links_cache *);
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static void free_cache(struct name_cache *cache);
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static const char * lookup_gname(struct bsdtar *bsdtar, gid_t gid);
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static int lookup_gname_helper(struct bsdtar *bsdtar,
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const char **name, id_t gid);
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static void lookup_hardlink(struct bsdtar *,
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struct archive_entry *entry, const struct stat *);
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static const char * lookup_uname(struct bsdtar *bsdtar, uid_t uid);
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static int lookup_uname_helper(struct bsdtar *bsdtar,
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const char **name, id_t uid);
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static int new_enough(struct bsdtar *, const char *path,
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const struct stat *);
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static void setup_acls(struct bsdtar *, struct archive_entry *,
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const char *path);
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static void setup_xattrs(struct bsdtar *, struct archive_entry *,
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const char *path);
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static void test_for_append(struct bsdtar *);
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static void write_archive(struct archive *, struct bsdtar *);
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static void write_entry(struct bsdtar *, struct archive *,
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const struct stat *, const char *pathname,
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unsigned pathlen, const char *accpath);
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static int write_file_data(struct bsdtar *, struct archive *,
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int fd);
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static void write_hierarchy(struct bsdtar *, struct archive *,
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const char *);
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void
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tar_mode_c(struct bsdtar *bsdtar)
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{
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struct archive *a;
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int r;
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if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
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bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
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a = archive_write_new();
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/* Support any format that the library supports. */
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if (bsdtar->create_format == NULL) {
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r = archive_write_set_format_pax_restricted(a);
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bsdtar->create_format = "pax restricted";
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} else {
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r = archive_write_set_format_by_name(a, bsdtar->create_format);
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}
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if (r != ARCHIVE_OK) {
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fprintf(stderr, "Can't use format %s: %s\n",
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bsdtar->create_format,
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archive_error_string(a));
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usage(bsdtar);
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}
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/*
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* If user explicitly set the block size, then assume they
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* want the last block padded as well. Otherwise, use the
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* default block size and accept archive_write_open_file()'s
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* default padding decisions.
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*/
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if (bsdtar->bytes_per_block != 0) {
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archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
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archive_write_set_bytes_in_last_block(a,
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bsdtar->bytes_per_block);
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} else
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archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
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switch (bsdtar->create_compression) {
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case 0:
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break;
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#ifdef HAVE_LIBBZ2
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case 'j': case 'y':
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archive_write_set_compression_bzip2(a);
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break;
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#endif
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#ifdef HAVE_LIBZ
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case 'z':
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archive_write_set_compression_gzip(a);
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break;
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#endif
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default:
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bsdtar_errc(bsdtar, 1, 0,
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"Unrecognized compression option -%c",
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bsdtar->create_compression);
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}
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r = archive_write_open_file(a, bsdtar->filename);
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if (r != ARCHIVE_OK)
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bsdtar_errc(bsdtar, 1, 0, archive_error_string(a));
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write_archive(a, bsdtar);
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if (bsdtar->option_totals) {
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fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
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(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
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}
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archive_write_finish(a);
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}
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/*
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* Same as 'c', except we only support tar formats in uncompressed
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* files on disk.
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*/
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void
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tar_mode_r(struct bsdtar *bsdtar)
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{
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off_t end_offset;
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int format;
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struct archive *a;
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struct archive_entry *entry;
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/* Sanity-test some arguments and the file. */
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test_for_append(bsdtar);
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format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
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bsdtar->fd = open(bsdtar->filename, O_RDWR);
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if (bsdtar->fd < 0)
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bsdtar_errc(bsdtar, 1, errno,
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"Cannot open %s", bsdtar->filename);
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a = archive_read_new();
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archive_read_support_compression_all(a);
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archive_read_support_format_tar(a);
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archive_read_support_format_gnutar(a);
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archive_read_open_fd(a, bsdtar->fd, 10240);
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while (0 == archive_read_next_header(a, &entry)) {
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if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
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archive_read_finish(a);
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close(bsdtar->fd);
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bsdtar_errc(bsdtar, 1, 0,
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"Cannot append to compressed archive.");
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}
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/* Keep going until we hit end-of-archive */
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format = archive_format(a);
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}
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end_offset = archive_read_header_position(a);
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archive_read_finish(a);
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/* Re-open archive for writing */
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a = archive_write_new();
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archive_write_set_compression_none(a);
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/*
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* Set format to same one auto-detected above, except use
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* ustar for appending to GNU tar, since the library doesn't
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* write GNU tar format.
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*/
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if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
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format = ARCHIVE_FORMAT_TAR_USTAR;
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archive_write_set_format(a, format);
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lseek(bsdtar->fd, end_offset, SEEK_SET); /* XXX check return val XXX */
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archive_write_open_fd(a, bsdtar->fd); /* XXX check return val XXX */
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write_archive(a, bsdtar); /* XXX check return val XXX */
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if (bsdtar->option_totals) {
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fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
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(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
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}
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archive_write_finish(a);
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close(bsdtar->fd);
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bsdtar->fd = -1;
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}
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void
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tar_mode_u(struct bsdtar *bsdtar)
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{
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off_t end_offset;
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struct archive *a;
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struct archive_entry *entry;
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int format;
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struct archive_dir_entry *p;
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struct archive_dir archive_dir;
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bsdtar->archive_dir = &archive_dir;
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memset(&archive_dir, 0, sizeof(archive_dir));
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format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
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/* Sanity-test some arguments and the file. */
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test_for_append(bsdtar);
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bsdtar->fd = open(bsdtar->filename, O_RDWR);
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if (bsdtar->fd < 0)
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bsdtar_errc(bsdtar, 1, errno,
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"Cannot open %s", bsdtar->filename);
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a = archive_read_new();
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archive_read_support_compression_all(a);
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archive_read_support_format_tar(a);
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archive_read_support_format_gnutar(a);
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if (archive_read_open_fd(a, bsdtar->fd,
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bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
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DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
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bsdtar_errc(bsdtar, 1, 0,
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"Can't open %s: %s", bsdtar->filename,
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archive_error_string(a));
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}
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/* Build a list of all entries and their recorded mod times. */
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while (0 == archive_read_next_header(a, &entry)) {
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if (archive_compression(a) != ARCHIVE_COMPRESSION_NONE) {
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archive_read_finish(a);
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close(bsdtar->fd);
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bsdtar_errc(bsdtar, 1, 0,
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"Cannot append to compressed archive.");
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}
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add_dir_list(bsdtar, archive_entry_pathname(entry),
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archive_entry_mtime(entry),
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archive_entry_mtime_nsec(entry));
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/* Record the last format determination we see */
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format = archive_format(a);
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/* Keep going until we hit end-of-archive */
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}
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end_offset = archive_read_header_position(a);
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archive_read_finish(a);
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/* Re-open archive for writing. */
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a = archive_write_new();
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archive_write_set_compression_none(a);
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/*
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* Set format to same one auto-detected above, except that
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* we don't write GNU tar format, so use ustar instead.
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*/
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if (format == ARCHIVE_FORMAT_TAR_GNUTAR)
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format = ARCHIVE_FORMAT_TAR_USTAR;
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archive_write_set_format(a, format);
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if (bsdtar->bytes_per_block != 0) {
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archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
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archive_write_set_bytes_in_last_block(a,
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bsdtar->bytes_per_block);
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} else
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archive_write_set_bytes_per_block(a, DEFAULT_BYTES_PER_BLOCK);
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lseek(bsdtar->fd, end_offset, SEEK_SET);
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ftruncate(bsdtar->fd, end_offset);
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archive_write_open_fd(a, bsdtar->fd);
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write_archive(a, bsdtar);
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if (bsdtar->option_totals) {
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fprintf(stderr, "Total bytes written: " BSDTAR_FILESIZE_PRINTF "\n",
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(BSDTAR_FILESIZE_TYPE)archive_position_compressed(a));
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}
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archive_write_finish(a);
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close(bsdtar->fd);
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bsdtar->fd = -1;
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while (bsdtar->archive_dir->head != NULL) {
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p = bsdtar->archive_dir->head->next;
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free(bsdtar->archive_dir->head->name);
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free(bsdtar->archive_dir->head);
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bsdtar->archive_dir->head = p;
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}
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bsdtar->archive_dir->tail = NULL;
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}
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/*
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* Write user-specified files/dirs to opened archive.
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*/
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static void
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write_archive(struct archive *a, struct bsdtar *bsdtar)
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{
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const char *arg;
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if (bsdtar->names_from_file != NULL)
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archive_names_from_file(bsdtar, a);
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while (*bsdtar->argv) {
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arg = *bsdtar->argv;
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if (arg[0] == '-' && arg[1] == 'C') {
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arg += 2;
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if (*arg == '\0') {
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bsdtar->argv++;
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arg = *bsdtar->argv;
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if (arg == NULL) {
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bsdtar_warnc(bsdtar, 1, 0,
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"Missing argument for -C");
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bsdtar->return_value = 1;
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return;
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}
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}
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set_chdir(bsdtar, arg);
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} else {
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if (*arg != '/' || (arg[0] == '@' && arg[1] != '/'))
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do_chdir(bsdtar); /* Handle a deferred -C */
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if (*arg == '@') {
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if (append_archive(bsdtar, a, arg + 1) != 0)
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break;
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} else
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write_hierarchy(bsdtar, a, arg);
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}
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bsdtar->argv++;
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}
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create_cleanup(bsdtar);
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archive_write_close(a);
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}
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/*
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* Archive names specified in file.
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*
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* Unless --null was specified, a line containing exactly "-C" will
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* cause the next line to be a directory to pass to chdir(). If
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* --null is specified, then a line "-C" is just another filename.
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*/
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void
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archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
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{
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bsdtar->archive = a;
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bsdtar->next_line_is_dir = 0;
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process_lines(bsdtar, bsdtar->names_from_file,
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archive_names_from_file_helper);
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if (bsdtar->next_line_is_dir)
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bsdtar_errc(bsdtar, 1, errno,
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"Unexpected end of filename list; "
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"directory expected after -C");
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}
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static int
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archive_names_from_file_helper(struct bsdtar *bsdtar, const char *line)
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{
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if (bsdtar->next_line_is_dir) {
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set_chdir(bsdtar, line);
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bsdtar->next_line_is_dir = 0;
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} else if (!bsdtar->option_null && strcmp(line, "-C") == 0)
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bsdtar->next_line_is_dir = 1;
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else {
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if (*line != '/')
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do_chdir(bsdtar); /* Handle a deferred -C */
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write_hierarchy(bsdtar, bsdtar->archive, line);
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}
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return (0);
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}
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/*
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* Copy from specified archive to current archive. Returns non-zero
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* for write errors (which force us to terminate the entire archiving
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* operation). If there are errors reading the input archive, we set
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* bsdtar->return_value but return zero, so the overall archiving
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* operation will complete and return non-zero.
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*/
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static int
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append_archive(struct bsdtar *bsdtar, struct archive *a, const char *filename)
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{
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struct archive *ina;
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struct archive_entry *in_entry;
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int bytes_read, bytes_written;
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char buff[8192];
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if (strcmp(filename, "-") == 0)
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filename = NULL; /* Library uses NULL for stdio. */
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ina = archive_read_new();
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archive_read_support_format_all(ina);
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archive_read_support_compression_all(ina);
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if (archive_read_open_file(ina, filename, 10240)) {
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bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(ina));
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bsdtar->return_value = 1;
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return (0);
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}
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while (0 == archive_read_next_header(ina, &in_entry)) {
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if (!new_enough(bsdtar, archive_entry_pathname(in_entry),
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archive_entry_stat(in_entry)))
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continue;
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if (excluded(bsdtar, archive_entry_pathname(in_entry)))
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continue;
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if (bsdtar->option_interactive &&
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!yes("copy '%s'", archive_entry_pathname(in_entry)))
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continue;
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if (bsdtar->verbose)
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safe_fprintf(stderr, "a %s",
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archive_entry_pathname(in_entry));
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/* XXX handle/report errors XXX */
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if (archive_write_header(a, in_entry)) {
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bsdtar_warnc(bsdtar, 0, "%s",
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archive_error_string(ina));
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bsdtar->return_value = 1;
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return (-1);
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}
|
|
bytes_read = archive_read_data(ina, buff, sizeof(buff));
|
|
while (bytes_read > 0) {
|
|
bytes_written =
|
|
archive_write_data(a, buff, bytes_read);
|
|
if (bytes_written < bytes_read) {
|
|
bsdtar_warnc(bsdtar, archive_errno(a), "%s",
|
|
archive_error_string(a));
|
|
return (-1);
|
|
}
|
|
bytes_read =
|
|
archive_read_data(ina, buff, sizeof(buff));
|
|
}
|
|
if (bsdtar->verbose)
|
|
fprintf(stderr, "\n");
|
|
|
|
}
|
|
if (archive_errno(ina)) {
|
|
bsdtar_warnc(bsdtar, 0, "Error reading archive %s: %s",
|
|
filename, archive_error_string(ina));
|
|
bsdtar->return_value = 1;
|
|
}
|
|
|
|
/* Note: If we got here, we saw no write errors, so return success. */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Add the file or dir hierarchy named by 'path' to the archive
|
|
*/
|
|
static void
|
|
write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
|
|
{
|
|
struct tree *tree;
|
|
char symlink_mode = bsdtar->symlink_mode;
|
|
dev_t first_dev = 0;
|
|
int dev_recorded = 0;
|
|
int tree_ret;
|
|
#ifdef __linux
|
|
int fd, r;
|
|
unsigned long fflags;
|
|
#endif
|
|
|
|
tree = tree_open(path);
|
|
|
|
if (!tree) {
|
|
bsdtar_warnc(bsdtar, errno, "%s: Cannot open", path);
|
|
bsdtar->return_value = 1;
|
|
return;
|
|
}
|
|
|
|
while ((tree_ret = tree_next(tree))) {
|
|
const char *name = tree_current_path(tree);
|
|
const struct stat *st = NULL, *lst = NULL;
|
|
int descend;
|
|
|
|
if (tree_ret == TREE_ERROR_DIR)
|
|
bsdtar_warnc(bsdtar, errno, "%s: Couldn't visit directory", name);
|
|
if (tree_ret != TREE_REGULAR)
|
|
continue;
|
|
lst = tree_current_lstat(tree);
|
|
if (lst == NULL) {
|
|
/* Couldn't lstat(); must not exist. */
|
|
bsdtar_warnc(bsdtar, errno, "%s: Cannot stat", path);
|
|
bsdtar->return_value = 1;
|
|
continue;
|
|
}
|
|
if (S_ISLNK(lst->st_mode))
|
|
st = tree_current_stat(tree);
|
|
/* Default: descend into any dir or symlink to dir. */
|
|
/* We'll adjust this later on. */
|
|
descend = 0;
|
|
if ((st != NULL) && S_ISDIR(st->st_mode))
|
|
descend = 1;
|
|
if ((lst != NULL) && S_ISDIR(lst->st_mode))
|
|
descend = 1;
|
|
|
|
/*
|
|
* If user has asked us not to cross mount points,
|
|
* then don't descend into into a dir on a different
|
|
* device.
|
|
*/
|
|
if (!dev_recorded) {
|
|
first_dev = lst->st_dev;
|
|
dev_recorded = 1;
|
|
}
|
|
if (bsdtar->option_dont_traverse_mounts) {
|
|
if (lst != NULL && lst->st_dev != first_dev)
|
|
descend = 0;
|
|
}
|
|
|
|
/*
|
|
* If this file/dir is flagged "nodump" and we're
|
|
* honoring such flags, skip this file/dir.
|
|
*/
|
|
#ifdef HAVE_CHFLAGS
|
|
if (bsdtar->option_honor_nodump &&
|
|
(lst->st_flags & UF_NODUMP))
|
|
continue;
|
|
#endif
|
|
|
|
#ifdef __linux
|
|
/*
|
|
* Linux has a nodump flag too but to read it
|
|
* we have to open() the file/dir and do an ioctl on it...
|
|
*/
|
|
if (bsdtar->option_honor_nodump &&
|
|
((fd = open(name, O_RDONLY|O_NONBLOCK)) >= 0) &&
|
|
((r = ioctl(fd, EXT2_IOC_GETFLAGS, &fflags)),
|
|
close(fd), r) >= 0 &&
|
|
(fflags & EXT2_NODUMP_FL))
|
|
continue;
|
|
#endif
|
|
|
|
/*
|
|
* If this file/dir is excluded by a filename
|
|
* pattern, skip it.
|
|
*/
|
|
if (excluded(bsdtar, name))
|
|
continue;
|
|
|
|
/*
|
|
* If the user vetoes this file/directory, skip it.
|
|
*/
|
|
if (bsdtar->option_interactive &&
|
|
!yes("add '%s'", name))
|
|
continue;
|
|
|
|
/*
|
|
* If this is a dir, decide whether or not to recurse.
|
|
*/
|
|
if (bsdtar->option_no_subdirs)
|
|
descend = 0;
|
|
|
|
/*
|
|
* Distinguish 'L'/'P'/'H' symlink following.
|
|
*/
|
|
switch(symlink_mode) {
|
|
case 'H':
|
|
/* 'H': After the first item, rest like 'P'. */
|
|
symlink_mode = 'P';
|
|
/* 'H': First item (from command line) like 'L'. */
|
|
/* FALLTHROUGH */
|
|
case 'L':
|
|
/* 'L': Do descend through a symlink to dir. */
|
|
/* 'L': Archive symlink to file as file. */
|
|
lst = tree_current_stat(tree);
|
|
/* If stat fails, we have a broken symlink;
|
|
* in that case, archive the link as such. */
|
|
if (lst == NULL)
|
|
lst = tree_current_lstat(tree);
|
|
break;
|
|
default:
|
|
/* 'P': Don't descend through a symlink to dir. */
|
|
if (!S_ISDIR(lst->st_mode))
|
|
descend = 0;
|
|
/* 'P': Archive symlink to file as symlink. */
|
|
/* lst = tree_current_lstat(tree); */
|
|
break;
|
|
}
|
|
|
|
if (descend)
|
|
tree_descend(tree);
|
|
|
|
/*
|
|
* Write the entry. Note that write_entry() handles
|
|
* pathname editing and newness testing.
|
|
*/
|
|
write_entry(bsdtar, a, lst, name,
|
|
tree_current_pathlen(tree),
|
|
tree_current_access_path(tree));
|
|
}
|
|
tree_close(tree);
|
|
}
|
|
|
|
/*
|
|
* Add a single filesystem object to the archive.
|
|
*/
|
|
static void
|
|
write_entry(struct bsdtar *bsdtar, struct archive *a, const struct stat *st,
|
|
const char *pathname, unsigned pathlen, const char *accpath)
|
|
{
|
|
struct archive_entry *entry;
|
|
int e;
|
|
int fd;
|
|
#ifdef __linux
|
|
int r;
|
|
unsigned long stflags;
|
|
#endif
|
|
static char linkbuffer[PATH_MAX+1];
|
|
|
|
(void)pathlen; /* UNUSED */
|
|
|
|
fd = -1;
|
|
entry = archive_entry_new();
|
|
|
|
archive_entry_set_pathname(entry, pathname);
|
|
|
|
/*
|
|
* Rewrite the pathname to be archived. If rewrite
|
|
* fails, skip the entry.
|
|
*/
|
|
if (edit_pathname(bsdtar, entry))
|
|
goto abort;
|
|
|
|
/*
|
|
* In -u mode, check that the file is newer than what's
|
|
* already in the archive; in all modes, obey --newerXXX flags.
|
|
*/
|
|
if (!new_enough(bsdtar, archive_entry_pathname(entry), st))
|
|
goto abort;
|
|
|
|
if (!S_ISDIR(st->st_mode) && (st->st_nlink > 1))
|
|
lookup_hardlink(bsdtar, entry, st);
|
|
|
|
/* Display entry as we process it. This format is required by SUSv2. */
|
|
if (bsdtar->verbose)
|
|
safe_fprintf(stderr, "a %s", archive_entry_pathname(entry));
|
|
|
|
/* Read symbolic link information. */
|
|
if ((st->st_mode & S_IFMT) == S_IFLNK) {
|
|
int lnklen;
|
|
|
|
lnklen = readlink(accpath, linkbuffer, PATH_MAX);
|
|
if (lnklen < 0) {
|
|
if (!bsdtar->verbose)
|
|
bsdtar_warnc(bsdtar, errno,
|
|
"%s: Couldn't read symbolic link",
|
|
pathname);
|
|
else
|
|
safe_fprintf(stderr,
|
|
": Couldn't read symbolic link: %s",
|
|
strerror(errno));
|
|
goto cleanup;
|
|
}
|
|
linkbuffer[lnklen] = 0;
|
|
archive_entry_set_symlink(entry, linkbuffer);
|
|
}
|
|
|
|
/* Look up username and group name. */
|
|
archive_entry_set_uname(entry, lookup_uname(bsdtar, st->st_uid));
|
|
archive_entry_set_gname(entry, lookup_gname(bsdtar, st->st_gid));
|
|
|
|
#ifdef HAVE_CHFLAGS
|
|
if (st->st_flags != 0)
|
|
archive_entry_set_fflags(entry, st->st_flags, 0);
|
|
#endif
|
|
|
|
#ifdef __linux
|
|
if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode)) &&
|
|
((fd = open(accpath, O_RDONLY|O_NONBLOCK)) >= 0) &&
|
|
((r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags)), close(fd), (fd = -1), r) >= 0 &&
|
|
stflags) {
|
|
archive_entry_set_fflags(entry, stflags, 0);
|
|
}
|
|
#endif
|
|
|
|
archive_entry_copy_stat(entry, st);
|
|
setup_acls(bsdtar, entry, accpath);
|
|
setup_xattrs(bsdtar, entry, accpath);
|
|
|
|
/*
|
|
* If it's a regular file (and non-zero in size) make sure we
|
|
* can open it before we start to write. In particular, note
|
|
* that we can always archive a zero-length file, even if we
|
|
* can't read it.
|
|
*/
|
|
if (S_ISREG(st->st_mode) && st->st_size > 0) {
|
|
fd = open(accpath, O_RDONLY);
|
|
if (fd < 0) {
|
|
if (!bsdtar->verbose)
|
|
bsdtar_warnc(bsdtar, errno, "%s: could not open file", pathname);
|
|
else
|
|
fprintf(stderr, ": %s", strerror(errno));
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/* Non-regular files get archived with zero size. */
|
|
if (!S_ISREG(st->st_mode))
|
|
archive_entry_set_size(entry, 0);
|
|
|
|
e = archive_write_header(a, entry);
|
|
if (e != ARCHIVE_OK) {
|
|
if (!bsdtar->verbose)
|
|
bsdtar_warnc(bsdtar, 0, "%s: %s", pathname,
|
|
archive_error_string(a));
|
|
else
|
|
fprintf(stderr, ": %s", archive_error_string(a));
|
|
}
|
|
|
|
if (e == ARCHIVE_FATAL)
|
|
exit(1);
|
|
|
|
/*
|
|
* If we opened a file earlier, write it out now. Note that
|
|
* the format handler might have reset the size field to zero
|
|
* to inform us that the archive body won't get stored. In
|
|
* that case, just skip the write.
|
|
*/
|
|
if (fd >= 0 && archive_entry_size(entry) > 0)
|
|
write_file_data(bsdtar, a, fd);
|
|
|
|
cleanup:
|
|
if (bsdtar->verbose)
|
|
fprintf(stderr, "\n");
|
|
|
|
abort:
|
|
if (fd >= 0)
|
|
close(fd);
|
|
|
|
if (entry != NULL)
|
|
archive_entry_free(entry);
|
|
}
|
|
|
|
|
|
/* Helper function to copy file to archive, with stack-allocated buffer. */
|
|
static int
|
|
write_file_data(struct bsdtar *bsdtar, struct archive *a, int fd)
|
|
{
|
|
char buff[64*1024];
|
|
ssize_t bytes_read;
|
|
ssize_t bytes_written;
|
|
|
|
/* XXX TODO: Allocate buffer on heap and store pointer to
|
|
* it in bsdtar structure; arrange cleanup as well. XXX */
|
|
(void)bsdtar;
|
|
|
|
bytes_read = read(fd, buff, sizeof(buff));
|
|
while (bytes_read > 0) {
|
|
bytes_written = archive_write_data(a, buff, bytes_read);
|
|
if (bytes_written <= 0)
|
|
return (-1); /* Write failed; this is bad */
|
|
bytes_read = read(fd, buff, sizeof(buff));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
create_cleanup(struct bsdtar *bsdtar)
|
|
{
|
|
/* Free inode->pathname map used for hardlink detection. */
|
|
if (bsdtar->links_cache != NULL) {
|
|
free_buckets(bsdtar, bsdtar->links_cache);
|
|
free(bsdtar->links_cache);
|
|
bsdtar->links_cache = NULL;
|
|
}
|
|
|
|
free_cache(bsdtar->uname_cache);
|
|
bsdtar->uname_cache = NULL;
|
|
free_cache(bsdtar->gname_cache);
|
|
bsdtar->gname_cache = NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
free_buckets(struct bsdtar *bsdtar, struct links_cache *links_cache)
|
|
{
|
|
size_t i;
|
|
|
|
if (links_cache->buckets == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < links_cache->number_buckets; i++) {
|
|
while (links_cache->buckets[i] != NULL) {
|
|
struct links_entry *lp = links_cache->buckets[i]->next;
|
|
if (bsdtar->option_warn_links)
|
|
bsdtar_warnc(bsdtar, 0, "Missing links to %s",
|
|
links_cache->buckets[i]->name);
|
|
if (links_cache->buckets[i]->name != NULL)
|
|
free(links_cache->buckets[i]->name);
|
|
free(links_cache->buckets[i]);
|
|
links_cache->buckets[i] = lp;
|
|
}
|
|
}
|
|
free(links_cache->buckets);
|
|
links_cache->buckets = NULL;
|
|
}
|
|
|
|
static void
|
|
lookup_hardlink(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const struct stat *st)
|
|
{
|
|
struct links_cache *links_cache;
|
|
struct links_entry *le, **new_buckets;
|
|
int hash;
|
|
size_t i, new_size;
|
|
|
|
/* If necessary, initialize the links cache. */
|
|
links_cache = bsdtar->links_cache;
|
|
if (links_cache == NULL) {
|
|
bsdtar->links_cache = malloc(sizeof(struct links_cache));
|
|
if (bsdtar->links_cache == NULL)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM,
|
|
"No memory for hardlink detection.");
|
|
links_cache = bsdtar->links_cache;
|
|
memset(links_cache, 0, sizeof(struct links_cache));
|
|
links_cache->number_buckets = links_cache_initial_size;
|
|
links_cache->buckets = malloc(links_cache->number_buckets *
|
|
sizeof(links_cache->buckets[0]));
|
|
if (links_cache->buckets == NULL) {
|
|
bsdtar_errc(bsdtar, 1, ENOMEM,
|
|
"No memory for hardlink detection.");
|
|
}
|
|
for (i = 0; i < links_cache->number_buckets; i++)
|
|
links_cache->buckets[i] = NULL;
|
|
}
|
|
|
|
/* If the links cache overflowed and got flushed, don't bother. */
|
|
if (links_cache->buckets == NULL)
|
|
return;
|
|
|
|
/* If the links cache is getting too full, enlarge the hash table. */
|
|
if (links_cache->number_entries > links_cache->number_buckets * 2)
|
|
{
|
|
new_size = links_cache->number_buckets * 2;
|
|
new_buckets = malloc(new_size * sizeof(struct links_entry *));
|
|
|
|
if (new_buckets != NULL) {
|
|
memset(new_buckets, 0,
|
|
new_size * sizeof(struct links_entry *));
|
|
for (i = 0; i < links_cache->number_buckets; i++) {
|
|
while (links_cache->buckets[i] != NULL) {
|
|
/* Remove entry from old bucket. */
|
|
le = links_cache->buckets[i];
|
|
links_cache->buckets[i] = le->next;
|
|
|
|
/* Add entry to new bucket. */
|
|
hash = (le->dev ^ le->ino) % new_size;
|
|
|
|
if (new_buckets[hash] != NULL)
|
|
new_buckets[hash]->previous =
|
|
le;
|
|
le->next = new_buckets[hash];
|
|
le->previous = NULL;
|
|
new_buckets[hash] = le;
|
|
}
|
|
}
|
|
free(links_cache->buckets);
|
|
links_cache->buckets = new_buckets;
|
|
links_cache->number_buckets = new_size;
|
|
} else {
|
|
free_buckets(bsdtar, links_cache);
|
|
bsdtar_warnc(bsdtar, ENOMEM,
|
|
"No more memory for recording hard links");
|
|
bsdtar_warnc(bsdtar, 0,
|
|
"Remaining links will be dumped as full files");
|
|
}
|
|
}
|
|
|
|
/* Try to locate this entry in the links cache. */
|
|
hash = ( st->st_dev ^ st->st_ino ) % links_cache->number_buckets;
|
|
for (le = links_cache->buckets[hash]; le != NULL; le = le->next) {
|
|
if (le->dev == st->st_dev && le->ino == st->st_ino) {
|
|
archive_entry_copy_hardlink(entry, le->name);
|
|
|
|
/*
|
|
* Decrement link count each time and release
|
|
* the entry if it hits zero. This saves
|
|
* memory and is necessary for proper -l
|
|
* implementation.
|
|
*/
|
|
if (--le->links <= 0) {
|
|
if (le->previous != NULL)
|
|
le->previous->next = le->next;
|
|
if (le->next != NULL)
|
|
le->next->previous = le->previous;
|
|
if (le->name != NULL)
|
|
free(le->name);
|
|
if (links_cache->buckets[hash] == le)
|
|
links_cache->buckets[hash] = le->next;
|
|
links_cache->number_entries--;
|
|
free(le);
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Add this entry to the links cache. */
|
|
le = malloc(sizeof(struct links_entry));
|
|
if (le != NULL)
|
|
le->name = strdup(archive_entry_pathname(entry));
|
|
if ((le == NULL) || (le->name == NULL)) {
|
|
free_buckets(bsdtar, links_cache);
|
|
bsdtar_warnc(bsdtar, ENOMEM,
|
|
"No more memory for recording hard links");
|
|
bsdtar_warnc(bsdtar, 0,
|
|
"Remaining hard links will be dumped as full files");
|
|
if (le != NULL)
|
|
free(le);
|
|
return;
|
|
}
|
|
if (links_cache->buckets[hash] != NULL)
|
|
links_cache->buckets[hash]->previous = le;
|
|
links_cache->number_entries++;
|
|
le->next = links_cache->buckets[hash];
|
|
le->previous = NULL;
|
|
links_cache->buckets[hash] = le;
|
|
le->dev = st->st_dev;
|
|
le->ino = st->st_ino;
|
|
le->links = st->st_nlink - 1;
|
|
}
|
|
|
|
#ifdef HAVE_POSIX_ACL
|
|
static void setup_acl(struct bsdtar *bsdtar,
|
|
struct archive_entry *entry, const char *accpath,
|
|
int acl_type, int archive_entry_acl_type);
|
|
|
|
static void
|
|
setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath)
|
|
{
|
|
archive_entry_acl_clear(entry);
|
|
|
|
setup_acl(bsdtar, entry, accpath,
|
|
ACL_TYPE_ACCESS, ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
|
|
/* Only directories can have default ACLs. */
|
|
if (S_ISDIR(archive_entry_mode(entry)))
|
|
setup_acl(bsdtar, entry, accpath,
|
|
ACL_TYPE_DEFAULT, ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
|
|
}
|
|
|
|
static void
|
|
setup_acl(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath, int acl_type, int archive_entry_acl_type)
|
|
{
|
|
acl_t acl;
|
|
acl_tag_t acl_tag;
|
|
acl_entry_t acl_entry;
|
|
acl_permset_t acl_permset;
|
|
int s, ae_id, ae_tag, ae_perm;
|
|
const char *ae_name;
|
|
|
|
/* Retrieve access ACL from file. */
|
|
acl = acl_get_file(accpath, acl_type);
|
|
if (acl != NULL) {
|
|
s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
|
|
while (s == 1) {
|
|
ae_id = -1;
|
|
ae_name = NULL;
|
|
|
|
acl_get_tag_type(acl_entry, &acl_tag);
|
|
if (acl_tag == ACL_USER) {
|
|
ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
|
|
ae_name = lookup_uname(bsdtar, ae_id);
|
|
ae_tag = ARCHIVE_ENTRY_ACL_USER;
|
|
} else if (acl_tag == ACL_GROUP) {
|
|
ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
|
|
ae_name = lookup_gname(bsdtar, ae_id);
|
|
ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
|
|
} else if (acl_tag == ACL_MASK) {
|
|
ae_tag = ARCHIVE_ENTRY_ACL_MASK;
|
|
} else if (acl_tag == ACL_USER_OBJ) {
|
|
ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
|
|
} else if (acl_tag == ACL_GROUP_OBJ) {
|
|
ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
|
|
} else if (acl_tag == ACL_OTHER) {
|
|
ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
|
|
} else {
|
|
/* Skip types that libarchive can't support. */
|
|
continue;
|
|
}
|
|
|
|
acl_get_permset(acl_entry, &acl_permset);
|
|
ae_perm = 0;
|
|
/*
|
|
* acl_get_perm() is spelled differently on different
|
|
* platforms; see bsdtar_platform.h for details.
|
|
*/
|
|
if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
|
|
ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
|
|
if (ACL_GET_PERM(acl_permset, ACL_READ))
|
|
ae_perm |= ARCHIVE_ENTRY_ACL_READ;
|
|
if (ACL_GET_PERM(acl_permset, ACL_WRITE))
|
|
ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
|
|
|
|
archive_entry_acl_add_entry(entry,
|
|
archive_entry_acl_type, ae_perm, ae_tag,
|
|
ae_id, ae_name);
|
|
|
|
s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
|
|
}
|
|
acl_free(acl);
|
|
}
|
|
}
|
|
#else
|
|
static void
|
|
setup_acls(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath)
|
|
{
|
|
(void)bsdtar;
|
|
(void)entry;
|
|
(void)accpath;
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
|
|
|
|
static void
|
|
setup_xattr(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath, const char *name)
|
|
{
|
|
size_t size;
|
|
void *value = NULL;
|
|
char symlink_mode = bsdtar->symlink_mode;
|
|
|
|
if (symlink_mode == 'H')
|
|
size = getxattr(accpath, name, NULL, 0);
|
|
else
|
|
size = lgetxattr(accpath, name, NULL, 0);
|
|
|
|
if (size == -1) {
|
|
bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
|
|
return;
|
|
}
|
|
|
|
if (size > 0 && (value = malloc(size)) == NULL) {
|
|
bsdtar_errc(bsdtar, 1, errno, "Out of memory");
|
|
return;
|
|
}
|
|
|
|
if (symlink_mode == 'H')
|
|
size = getxattr(accpath, name, value, size);
|
|
else
|
|
size = lgetxattr(accpath, name, value, size);
|
|
|
|
if (size == -1) {
|
|
bsdtar_warnc(bsdtar, errno, "Couldn't get extended attribute");
|
|
return;
|
|
}
|
|
|
|
archive_entry_xattr_add_entry(entry, name, value, size);
|
|
|
|
free(value);
|
|
}
|
|
|
|
/*
|
|
* Linux extended attribute support
|
|
*/
|
|
static void
|
|
setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath)
|
|
{
|
|
char *list, *p;
|
|
size_t list_size;
|
|
char symlink_mode = bsdtar->symlink_mode;
|
|
|
|
if (symlink_mode == 'H')
|
|
list_size = listxattr(accpath, NULL, 0);
|
|
else
|
|
list_size = llistxattr(accpath, NULL, 0);
|
|
|
|
if (list_size == -1) {
|
|
bsdtar_warnc(bsdtar, errno,
|
|
"Couldn't list extended attributes");
|
|
return;
|
|
} else if (list_size == 0)
|
|
return;
|
|
|
|
if ((list = malloc(list_size)) == NULL) {
|
|
bsdtar_errc(bsdtar, 1, errno, "Out of memory");
|
|
return;
|
|
}
|
|
|
|
if (symlink_mode == 'H')
|
|
list_size = listxattr(accpath, list, list_size);
|
|
else
|
|
list_size = llistxattr(accpath, list, list_size);
|
|
|
|
if (list_size == -1) {
|
|
bsdtar_warnc(bsdtar, errno,
|
|
"Couldn't list extended attributes");
|
|
free(list);
|
|
return;
|
|
}
|
|
|
|
for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
|
|
if (strncmp(p, "system.", 7) == 0 ||
|
|
strncmp(p, "xfsroot.", 8) == 0)
|
|
continue;
|
|
|
|
setup_xattr(bsdtar, entry, accpath, p);
|
|
}
|
|
|
|
free(list);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* Generic (stub) extended attribute support.
|
|
*/
|
|
static void
|
|
setup_xattrs(struct bsdtar *bsdtar, struct archive_entry *entry,
|
|
const char *accpath)
|
|
{
|
|
(void)bsdtar; /* UNUSED */
|
|
(void)entry; /* UNUSED */
|
|
(void)accpath; /* UNUSED */
|
|
}
|
|
|
|
#endif
|
|
|
|
static void
|
|
free_cache(struct name_cache *cache)
|
|
{
|
|
size_t i;
|
|
|
|
if (cache != NULL) {
|
|
for (i = 0; i < cache->size; i++) {
|
|
if (cache->cache[i].name != NULL &&
|
|
cache->cache[i].name != NO_NAME)
|
|
free((void *)(uintptr_t)cache->cache[i].name);
|
|
}
|
|
free(cache);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lookup uid/gid from uname/gname, return NULL if no match.
|
|
*/
|
|
static const char *
|
|
lookup_name(struct bsdtar *bsdtar, struct name_cache **name_cache_variable,
|
|
int (*lookup_fn)(struct bsdtar *, const char **, id_t), id_t id)
|
|
{
|
|
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)
|
|
bsdtar_errc(bsdtar, 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++;
|
|
if (cache->cache[slot].name == NO_NAME)
|
|
return (NULL);
|
|
return (cache->cache[slot].name);
|
|
}
|
|
if (cache->cache[slot].name != NO_NAME)
|
|
free((void *)(uintptr_t)cache->cache[slot].name);
|
|
cache->cache[slot].name = NULL;
|
|
}
|
|
|
|
if (lookup_fn(bsdtar, &name, id) == 0) {
|
|
if (name == NULL || name[0] == '\0') {
|
|
/* Cache the negative response. */
|
|
cache->cache[slot].name = NO_NAME;
|
|
cache->cache[slot].id = id;
|
|
} else {
|
|
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 bsdtar *bsdtar, uid_t uid)
|
|
{
|
|
return (lookup_name(bsdtar, &bsdtar->uname_cache,
|
|
&lookup_uname_helper, (id_t)uid));
|
|
}
|
|
|
|
static int
|
|
lookup_uname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
|
|
{
|
|
struct passwd *pwent;
|
|
|
|
(void)bsdtar; /* UNUSED */
|
|
|
|
errno = 0;
|
|
pwent = getpwuid((uid_t)id);
|
|
if (pwent == NULL) {
|
|
*name = NULL;
|
|
if (errno != 0)
|
|
bsdtar_warnc(bsdtar, errno, "getpwuid(%d) failed", id);
|
|
return (errno);
|
|
}
|
|
|
|
*name = pwent->pw_name;
|
|
return (0);
|
|
}
|
|
|
|
static const char *
|
|
lookup_gname(struct bsdtar *bsdtar, gid_t gid)
|
|
{
|
|
return (lookup_name(bsdtar, &bsdtar->gname_cache,
|
|
&lookup_gname_helper, (id_t)gid));
|
|
}
|
|
|
|
static int
|
|
lookup_gname_helper(struct bsdtar *bsdtar, const char **name, id_t id)
|
|
{
|
|
struct group *grent;
|
|
|
|
(void)bsdtar; /* UNUSED */
|
|
|
|
errno = 0;
|
|
grent = getgrgid((gid_t)id);
|
|
if (grent == NULL) {
|
|
*name = NULL;
|
|
if (errno != 0)
|
|
bsdtar_warnc(bsdtar, errno, "getgrgid(%d) failed", id);
|
|
return (errno);
|
|
}
|
|
|
|
*name = grent->gr_name;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Test if the specified file is new enough to include in the archive.
|
|
*/
|
|
int
|
|
new_enough(struct bsdtar *bsdtar, const char *path, const struct stat *st)
|
|
{
|
|
struct archive_dir_entry *p;
|
|
|
|
/*
|
|
* If this file/dir is excluded by a time comparison, skip it.
|
|
*/
|
|
if (bsdtar->newer_ctime_sec > 0) {
|
|
if (st->st_ctime < bsdtar->newer_ctime_sec)
|
|
return (0); /* Too old, skip it. */
|
|
if (st->st_ctime == bsdtar->newer_ctime_sec
|
|
&& ARCHIVE_STAT_CTIME_NANOS(st)
|
|
<= bsdtar->newer_ctime_nsec)
|
|
return (0); /* Too old, skip it. */
|
|
}
|
|
if (bsdtar->newer_mtime_sec > 0) {
|
|
if (st->st_mtime < bsdtar->newer_mtime_sec)
|
|
return (0); /* Too old, skip it. */
|
|
if (st->st_mtime == bsdtar->newer_mtime_sec
|
|
&& ARCHIVE_STAT_MTIME_NANOS(st)
|
|
<= bsdtar->newer_mtime_nsec)
|
|
return (0); /* Too old, skip it. */
|
|
}
|
|
|
|
/*
|
|
* In -u mode, we only write an entry if it's newer than
|
|
* what was already in the archive.
|
|
*/
|
|
if (bsdtar->archive_dir != NULL &&
|
|
bsdtar->archive_dir->head != NULL) {
|
|
for (p = bsdtar->archive_dir->head; p != NULL; p = p->next) {
|
|
if (strcmp(path, p->name)==0)
|
|
return (p->mtime_sec < st->st_mtime ||
|
|
(p->mtime_sec == st->st_mtime &&
|
|
p->mtime_nsec
|
|
< ARCHIVE_STAT_MTIME_NANOS(st)));
|
|
}
|
|
}
|
|
|
|
/* If the file wasn't rejected, include it. */
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Add an entry to the dir list for 'u' mode.
|
|
*
|
|
* XXX TODO: Make this fast.
|
|
*/
|
|
static void
|
|
add_dir_list(struct bsdtar *bsdtar, const char *path,
|
|
time_t mtime_sec, int mtime_nsec)
|
|
{
|
|
struct archive_dir_entry *p;
|
|
|
|
if (path[0] == '.' && path[1] == '/' && path[2] != '\0')
|
|
path += 2;
|
|
|
|
/*
|
|
* Search entire list to see if this file has appeared before.
|
|
* If it has, override the timestamp data.
|
|
*/
|
|
p = bsdtar->archive_dir->head;
|
|
while (p != NULL) {
|
|
if (strcmp(path, p->name)==0) {
|
|
p->mtime_sec = mtime_sec;
|
|
p->mtime_nsec = mtime_nsec;
|
|
return;
|
|
}
|
|
p = p->next;
|
|
}
|
|
|
|
p = malloc(sizeof(*p));
|
|
if (p == NULL)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
|
|
|
|
p->name = strdup(path);
|
|
if (p->name == NULL)
|
|
bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read archive directory");
|
|
p->mtime_sec = mtime_sec;
|
|
p->mtime_nsec = mtime_nsec;
|
|
p->next = NULL;
|
|
if (bsdtar->archive_dir->tail == NULL) {
|
|
bsdtar->archive_dir->head = bsdtar->archive_dir->tail = p;
|
|
} else {
|
|
bsdtar->archive_dir->tail->next = p;
|
|
bsdtar->archive_dir->tail = p;
|
|
}
|
|
}
|
|
|
|
void
|
|
test_for_append(struct bsdtar *bsdtar)
|
|
{
|
|
struct stat s;
|
|
|
|
if (*bsdtar->argv == NULL)
|
|
bsdtar_errc(bsdtar, 1, 0, "no files or directories specified");
|
|
if (bsdtar->filename == NULL)
|
|
bsdtar_errc(bsdtar, 1, 0, "Cannot append to stdout.");
|
|
|
|
if (bsdtar->create_compression != 0)
|
|
bsdtar_errc(bsdtar, 1, 0,
|
|
"Cannot append to %s with compression", bsdtar->filename);
|
|
|
|
if (stat(bsdtar->filename, &s) != 0)
|
|
bsdtar_errc(bsdtar, 1, errno,
|
|
"Cannot stat %s", bsdtar->filename);
|
|
|
|
if (!S_ISREG(s.st_mode))
|
|
bsdtar_errc(bsdtar, 1, 0,
|
|
"Cannot append to %s: not a regular file.",
|
|
bsdtar->filename);
|
|
}
|