| /*- |
| * Copyright (c) 2003-2007 Tim Kientzle |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "bsdtar_platform.h" |
| __FBSDID("$FreeBSD: src/usr.bin/tar/read.c,v 1.40 2008/08/21 06:41:14 kientzle Exp $"); |
| |
| #ifdef HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #endif |
| #ifdef HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #ifdef HAVE_SYS_STAT_H |
| #include <sys/stat.h> |
| #endif |
| |
| #ifdef HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| |
| #ifdef HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif |
| |
| #ifdef HAVE_GRP_H |
| #include <grp.h> |
| #endif |
| |
| #ifdef HAVE_IO_H |
| #include <io.h> |
| #endif |
| |
| #ifdef HAVE_LIMITS_H |
| #include <limits.h> |
| #endif |
| #ifdef HAVE_PWD_H |
| #include <pwd.h> |
| #endif |
| #ifdef HAVE_STDINT_H |
| #include <stdint.h> |
| #endif |
| #include <stdio.h> |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| #ifdef HAVE_TIME_H |
| #include <time.h> |
| #endif |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #include "bsdtar.h" |
| #include "err.h" |
| |
| struct progress_data { |
| struct bsdtar *bsdtar; |
| struct archive *archive; |
| struct archive_entry *entry; |
| }; |
| |
| static void read_archive(struct bsdtar *bsdtar, char mode, struct archive *); |
| static int unmatched_inclusions_warn(struct archive *matching, const char *); |
| |
| |
| void |
| tar_mode_t(struct bsdtar *bsdtar) |
| { |
| read_archive(bsdtar, 't', NULL); |
| if (unmatched_inclusions_warn(bsdtar->matching, |
| "Not found in archive") != 0) |
| bsdtar->return_value = 1; |
| } |
| |
| void |
| tar_mode_x(struct bsdtar *bsdtar) |
| { |
| struct archive *writer; |
| |
| writer = archive_write_disk_new(); |
| if (writer == NULL) |
| lafe_errc(1, ENOMEM, "Cannot allocate disk writer object"); |
| if ((bsdtar->flags & OPTFLAG_NUMERIC_OWNER) == 0) |
| archive_write_disk_set_standard_lookup(writer); |
| archive_write_disk_set_options(writer, bsdtar->extract_flags); |
| |
| read_archive(bsdtar, 'x', writer); |
| |
| if (unmatched_inclusions_warn(bsdtar->matching, |
| "Not found in archive") != 0) |
| bsdtar->return_value = 1; |
| archive_write_free(writer); |
| } |
| |
| static void |
| progress_func(void *cookie) |
| { |
| struct progress_data *progress_data = (struct progress_data *)cookie; |
| struct bsdtar *bsdtar = progress_data->bsdtar; |
| struct archive *a = progress_data->archive; |
| struct archive_entry *entry = progress_data->entry; |
| uint64_t comp, uncomp; |
| int compression; |
| |
| if (!need_report()) |
| return; |
| |
| if (bsdtar->verbose) |
| fprintf(stderr, "\n"); |
| if (a != NULL) { |
| comp = archive_filter_bytes(a, -1); |
| uncomp = archive_filter_bytes(a, 0); |
| if (comp > uncomp) |
| compression = 0; |
| else |
| compression = (int)((uncomp - comp) * 100 / uncomp); |
| fprintf(stderr, |
| "In: %s bytes, compression %d%%;", |
| tar_i64toa(comp), compression); |
| fprintf(stderr, " Out: %d files, %s bytes\n", |
| archive_file_count(a), tar_i64toa(uncomp)); |
| } |
| if (entry != NULL) { |
| safe_fprintf(stderr, "Current: %s", |
| archive_entry_pathname(entry)); |
| fprintf(stderr, " (%s bytes)\n", |
| tar_i64toa(archive_entry_size(entry))); |
| } |
| } |
| |
| /* |
| * Handle 'x' and 't' modes. |
| */ |
| static void |
| read_archive(struct bsdtar *bsdtar, char mode, struct archive *writer) |
| { |
| struct progress_data progress_data; |
| FILE *out; |
| struct archive *a; |
| struct archive_entry *entry; |
| const char *reader_options; |
| int r; |
| |
| while (*bsdtar->argv) { |
| if (archive_match_include_pattern(bsdtar->matching, |
| *bsdtar->argv) != ARCHIVE_OK) |
| lafe_errc(1, 0, "Error inclusion pattern: %s", |
| archive_error_string(bsdtar->matching)); |
| bsdtar->argv++; |
| } |
| |
| if (bsdtar->names_from_file != NULL) |
| if (archive_match_include_pattern_from_file( |
| bsdtar->matching, bsdtar->names_from_file, |
| (bsdtar->flags & OPTFLAG_NULL)) != ARCHIVE_OK) |
| lafe_errc(1, 0, "Error inclusion pattern: %s", |
| archive_error_string(bsdtar->matching)); |
| |
| a = archive_read_new(); |
| if (cset_read_support_filter_program(bsdtar->cset, a) == 0) |
| archive_read_support_filter_all(a); |
| archive_read_support_format_all(a); |
| |
| reader_options = getenv(ENV_READER_OPTIONS); |
| if (reader_options != NULL) { |
| size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; |
| size_t opt_len = strlen(reader_options) + 1; |
| char *p; |
| /* Set default read options. */ |
| if ((p = malloc(module_len + opt_len)) == NULL) |
| lafe_errc(1, errno, "Out of memory"); |
| /* Prepend magic code to ignore options for |
| * a format or modules which are not added to |
| * the archive read object. */ |
| memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); |
| memcpy(p + module_len, reader_options, opt_len); |
| r = archive_read_set_options(a, p); |
| free(p); |
| if (r == ARCHIVE_FATAL) |
| lafe_errc(1, 0, "%s", archive_error_string(a)); |
| else |
| archive_clear_error(a); |
| } |
| if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options)) |
| lafe_errc(1, 0, "%s", archive_error_string(a)); |
| if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS) |
| if (archive_read_set_options(a, |
| "read_concatenated_archives") != ARCHIVE_OK) |
| lafe_errc(1, 0, "%s", archive_error_string(a)); |
| if (bsdtar->passphrase != NULL) |
| r = archive_read_add_passphrase(a, bsdtar->passphrase); |
| else |
| r = archive_read_set_passphrase_callback(a, bsdtar, |
| &passphrase_callback); |
| if (r != ARCHIVE_OK) |
| lafe_errc(1, 0, "%s", archive_error_string(a)); |
| if (archive_read_open_filename(a, bsdtar->filename, |
| bsdtar->bytes_per_block)) |
| lafe_errc(1, 0, "Error opening archive: %s", |
| archive_error_string(a)); |
| |
| do_chdir(bsdtar); |
| |
| if (mode == 'x') { |
| /* Set an extract callback so that we can handle SIGINFO. */ |
| progress_data.bsdtar = bsdtar; |
| progress_data.archive = a; |
| archive_read_extract_set_progress_callback(a, progress_func, |
| &progress_data); |
| } |
| |
| if (mode == 'x' && (bsdtar->flags & OPTFLAG_CHROOT)) { |
| #if HAVE_CHROOT |
| if (chroot(".") != 0) |
| lafe_errc(1, errno, "Can't chroot to \".\""); |
| #else |
| lafe_errc(1, 0, |
| "chroot isn't supported on this platform"); |
| #endif |
| } |
| |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| if (mode == 'x' && (bsdtar->flags & OPTFLAG_STDOUT)) { |
| _setmode(1, _O_BINARY); |
| } |
| #endif |
| |
| for (;;) { |
| /* Support --fast-read option */ |
| const char *p; |
| if ((bsdtar->flags & OPTFLAG_FAST_READ) && |
| archive_match_path_unmatched_inclusions(bsdtar->matching) == 0) |
| break; |
| |
| r = archive_read_next_header(a, &entry); |
| progress_data.entry = entry; |
| if (r == ARCHIVE_EOF) |
| break; |
| if (r < ARCHIVE_OK) |
| lafe_warnc(0, "%s", archive_error_string(a)); |
| if (r <= ARCHIVE_WARN) |
| bsdtar->return_value = 1; |
| if (r == ARCHIVE_RETRY) { |
| /* Retryable error: try again */ |
| lafe_warnc(0, "Retrying..."); |
| continue; |
| } |
| if (r == ARCHIVE_FATAL) |
| break; |
| p = archive_entry_pathname(entry); |
| if (p == NULL || p[0] == '\0') { |
| lafe_warnc(0, "Archive entry has empty or unreadable filename ... skipping."); |
| bsdtar->return_value = 1; |
| continue; |
| } |
| |
| if (bsdtar->uid >= 0) { |
| archive_entry_set_uid(entry, bsdtar->uid); |
| archive_entry_set_uname(entry, NULL); |
| } |
| if (bsdtar->gid >= 0) { |
| archive_entry_set_gid(entry, bsdtar->gid); |
| archive_entry_set_gname(entry, NULL); |
| } |
| if (bsdtar->uname) |
| archive_entry_set_uname(entry, bsdtar->uname); |
| if (bsdtar->gname) |
| archive_entry_set_gname(entry, bsdtar->gname); |
| |
| /* |
| * Note that pattern exclusions are checked before |
| * pathname rewrites are handled. This gives more |
| * control over exclusions, since rewrites always lose |
| * information. (For example, consider a rewrite |
| * s/foo[0-9]/foo/. If we check exclusions after the |
| * rewrite, there would be no way to exclude foo1/bar |
| * while allowing foo2/bar.) |
| */ |
| if (archive_match_excluded(bsdtar->matching, entry)) |
| continue; /* Excluded by a pattern test. */ |
| |
| if (mode == 't') { |
| /* Perversely, gtar uses -O to mean "send to stderr" |
| * when used with -t. */ |
| out = (bsdtar->flags & OPTFLAG_STDOUT) ? |
| stderr : stdout; |
| |
| /* |
| * TODO: Provide some reasonable way to |
| * preview rewrites. gtar always displays |
| * the unedited path in -t output, which means |
| * you cannot easily preview rewrites. |
| */ |
| if (bsdtar->verbose < 2) |
| safe_fprintf(out, "%s", |
| archive_entry_pathname(entry)); |
| else |
| list_item_verbose(bsdtar, out, entry); |
| fflush(out); |
| r = archive_read_data_skip(a); |
| if (r == ARCHIVE_WARN) { |
| fprintf(out, "\n"); |
| lafe_warnc(0, "%s", |
| archive_error_string(a)); |
| } |
| if (r == ARCHIVE_RETRY) { |
| fprintf(out, "\n"); |
| lafe_warnc(0, "%s", |
| archive_error_string(a)); |
| } |
| if (r == ARCHIVE_FATAL) { |
| fprintf(out, "\n"); |
| lafe_warnc(0, "%s", |
| archive_error_string(a)); |
| bsdtar->return_value = 1; |
| break; |
| } |
| fprintf(out, "\n"); |
| } else { |
| /* Note: some rewrite failures prevent extraction. */ |
| if (edit_pathname(bsdtar, entry)) |
| continue; /* Excluded by a rewrite failure. */ |
| |
| if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && |
| !yes("extract '%s'", archive_entry_pathname(entry))) |
| continue; |
| |
| if (bsdtar->verbose > 1) { |
| /* GNU tar uses -tv format with -xvv */ |
| safe_fprintf(stderr, "x "); |
| list_item_verbose(bsdtar, stderr, entry); |
| fflush(stderr); |
| } else if (bsdtar->verbose > 0) { |
| /* Format follows SUSv2, including the |
| * deferred '\n'. */ |
| safe_fprintf(stderr, "x %s", |
| archive_entry_pathname(entry)); |
| fflush(stderr); |
| } |
| |
| /* TODO siginfo_printinfo(bsdtar, 0); */ |
| |
| if (bsdtar->flags & OPTFLAG_STDOUT) |
| r = archive_read_data_into_fd(a, 1); |
| else |
| r = archive_read_extract2(a, entry, writer); |
| if (r != ARCHIVE_OK) { |
| if (!bsdtar->verbose) |
| safe_fprintf(stderr, "%s", |
| archive_entry_pathname(entry)); |
| safe_fprintf(stderr, ": %s", |
| archive_error_string(a)); |
| if (!bsdtar->verbose) |
| fprintf(stderr, "\n"); |
| bsdtar->return_value = 1; |
| } |
| if (bsdtar->verbose) |
| fprintf(stderr, "\n"); |
| if (r == ARCHIVE_FATAL) |
| break; |
| } |
| } |
| |
| |
| r = archive_read_close(a); |
| if (r != ARCHIVE_OK) |
| lafe_warnc(0, "%s", archive_error_string(a)); |
| if (r <= ARCHIVE_WARN) |
| bsdtar->return_value = 1; |
| |
| if (bsdtar->verbose > 2) |
| fprintf(stdout, "Archive Format: %s, Compression: %s\n", |
| archive_format_name(a), archive_filter_name(a, 0)); |
| |
| archive_read_free(a); |
| } |
| |
| |
| static int |
| unmatched_inclusions_warn(struct archive *matching, const char *msg) |
| { |
| const char *p; |
| int r; |
| |
| if (matching == NULL) |
| return (0); |
| |
| while ((r = archive_match_path_unmatched_inclusions_next( |
| matching, &p)) == ARCHIVE_OK) |
| lafe_warnc(0, "%s: %s", p, msg); |
| if (r == ARCHIVE_FATAL) |
| lafe_errc(1, errno, "Out of memory"); |
| |
| return (archive_match_path_unmatched_inclusions(matching)); |
| } |