diff options
Diffstat (limited to 'contrib/libarchive/tar/read.c')
| -rw-r--r-- | contrib/libarchive/tar/read.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/contrib/libarchive/tar/read.c b/contrib/libarchive/tar/read.c new file mode 100644 index 000000000000..12d4b6adb598 --- /dev/null +++ b/contrib/libarchive/tar/read.c @@ -0,0 +1,473 @@ +/*- + * 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("$FreeBSD$"); + +#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_GRP_H +#include <grp.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 list_item_verbose(struct bsdtar *, FILE *, + struct archive_entry *); +static void read_archive(struct bsdtar *bsdtar, char mode, struct archive *); + +void +tar_mode_t(struct bsdtar *bsdtar) +{ + read_archive(bsdtar, 't', NULL); + if (lafe_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->option_numeric_owner) + archive_write_disk_set_standard_lookup(writer); + archive_write_disk_set_options(writer, bsdtar->extract_flags); + + read_archive(bsdtar, 'x', writer); + + if (lafe_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 = 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_position_compressed(a); + uncomp = archive_position_uncompressed(a); + 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; + int r; + time_t sec; + long nsec; + + while (*bsdtar->argv) { + lafe_include(&bsdtar->matching, *bsdtar->argv); + bsdtar->argv++; + } + + if (bsdtar->names_from_file != NULL) + lafe_include_from_file(&bsdtar->matching, + bsdtar->names_from_file, bsdtar->option_null); + + a = archive_read_new(); + if (bsdtar->compress_program != NULL) + archive_read_support_filter_program(a, bsdtar->compress_program); + else + archive_read_support_filter_all(a); + archive_read_support_format_all(a); + if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options)) + lafe_errc(1, 0, "%s", archive_error_string(a)); + if (archive_read_open_file(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->option_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 + } + + for (;;) { + /* Support --fast-read option */ + if (bsdtar->option_fast_read && + lafe_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; + + 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); + + /* + * Exclude entries that are too old. + */ + if (bsdtar->newer_ctime_filter) { + /* Use ctime if format provides, else mtime. */ + if (archive_entry_ctime_is_set(entry)) { + sec = archive_entry_ctime(entry); + nsec = archive_entry_ctime_nsec(entry); + } else if (archive_entry_mtime_is_set(entry)) { + sec = archive_entry_mtime(entry); + nsec = archive_entry_mtime_nsec(entry); + } else { + sec = 0; + nsec = 0; + } + if (sec < bsdtar->newer_ctime_sec) + continue; /* Too old, skip it. */ + if (sec == bsdtar->newer_ctime_sec + && nsec <= bsdtar->newer_ctime_nsec) + continue; /* Too old, skip it. */ + } + if (bsdtar->newer_mtime_filter) { + if (archive_entry_mtime_is_set(entry)) { + sec = archive_entry_mtime(entry); + nsec = archive_entry_mtime_nsec(entry); + } else { + sec = 0; + nsec = 0; + } + if (sec < bsdtar->newer_mtime_sec) + continue; /* Too old, skip it. */ + if (sec == bsdtar->newer_mtime_sec + && nsec <= bsdtar->newer_mtime_nsec) + continue; /* Too old, skip it. */ + } + + /* + * 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 (lafe_excluded(bsdtar->matching, archive_entry_pathname(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->option_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->option_interactive && + !yes("extract '%s'", archive_entry_pathname(entry))) + continue; + + /* + * Format here is from SUSv2, including the + * deferred '\n'. + */ + if (bsdtar->verbose) { + safe_fprintf(stderr, "x %s", + archive_entry_pathname(entry)); + fflush(stderr); + } + + /* TODO siginfo_printinfo(bsdtar, 0); */ + + if (bsdtar->option_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_compression_name(a)); + + archive_read_free(a); +} + + +/* + * 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 bsdtar *bsdtar, FILE *out, struct archive_entry *entry) +{ + char tmp[100]; + size_t w; + const char *p; + const char *fmt; + time_t tim; + static time_t now; + + /* + * We avoid collecting the entire list in memory at once by + * listing things as we see them. However, that also means we can't + * just pre-compute the field widths. Instead, we start with guesses + * and just widen them as necessary. These numbers are completely + * arbitrary. + */ + if (!bsdtar->u_width) { + bsdtar->u_width = 6; + bsdtar->gs_width = 13; + } + if (!now) + time(&now); + fprintf(out, "%s %d ", + archive_entry_strmode(entry), + archive_entry_nlink(entry)); + + /* Use uname if it's present, else uid. */ + p = archive_entry_uname(entry); + if ((p == NULL) || (*p == '\0')) { + sprintf(tmp, "%lu ", + (unsigned long)archive_entry_uid(entry)); + p = tmp; + } + w = strlen(p); + if (w > bsdtar->u_width) + bsdtar->u_width = w; + fprintf(out, "%-*s ", (int)bsdtar->u_width, p); + + /* Use gname if it's present, else gid. */ + p = archive_entry_gname(entry); + if (p != NULL && p[0] != '\0') { + fprintf(out, "%s", p); + w = strlen(p); + } else { + sprintf(tmp, "%lu", + (unsigned long)archive_entry_gid(entry)); + w = strlen(tmp); + fprintf(out, "%s", tmp); + } + + /* + * Print device number or file size, right-aligned so as to make + * total width of group and devnum/filesize fields be gs_width. + * If gs_width is too small, grow it. + */ + if (archive_entry_filetype(entry) == AE_IFCHR + || archive_entry_filetype(entry) == AE_IFBLK) { + sprintf(tmp, "%lu,%lu", + (unsigned long)archive_entry_rdevmajor(entry), + (unsigned long)archive_entry_rdevminor(entry)); + } else { + strcpy(tmp, tar_i64toa(archive_entry_size(entry))); + } + if (w + strlen(tmp) >= bsdtar->gs_width) + bsdtar->gs_width = w+strlen(tmp)+1; + fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp); + + /* Format the time using 'ls -l' conventions. */ + tim = archive_entry_mtime(entry); +#define HALF_YEAR (time_t)365 * 86400 / 2 +#if defined(_WIN32) && !defined(__CYGWIN__) +#define DAY_FMT "%d" /* Windows' strftime function does not support %e format. */ +#else +#define DAY_FMT "%e" /* Day number without leading zeros */ +#endif + if (tim < now - HALF_YEAR || tim > now + HALF_YEAR) + fmt = bsdtar->day_first ? DAY_FMT " %b %Y" : "%b " DAY_FMT " %Y"; + else + fmt = bsdtar->day_first ? DAY_FMT " %b %H:%M" : "%b " DAY_FMT " %H:%M"; + strftime(tmp, sizeof(tmp), fmt, localtime(&tim)); + fprintf(out, " %s ", tmp); + safe_fprintf(out, "%s", archive_entry_pathname(entry)); + + /* Extra information for links. */ + if (archive_entry_hardlink(entry)) /* Hard link */ + safe_fprintf(out, " link to %s", + archive_entry_hardlink(entry)); + else if (archive_entry_symlink(entry)) /* Symbolic link */ + safe_fprintf(out, " -> %s", archive_entry_symlink(entry)); +} |