290 lines
7.9 KiB
C
290 lines
7.9 KiB
C
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/*-
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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/types.h>
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#include <sys/stat.h>
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#include <archive.h>
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#include <archive_entry.h>
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#include <errno.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 <time.h>
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#include <unistd.h>
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#include "bsdtar.h"
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static void list_item_verbose(struct bsdtar *, struct archive_entry *);
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static void read_archive(struct bsdtar *bsdtar, char mode);
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void
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tar_mode_t(struct bsdtar *bsdtar)
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{
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read_archive(bsdtar, 't');
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}
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void
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tar_mode_x(struct bsdtar *bsdtar)
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{
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read_archive(bsdtar, 'x');
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}
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/*
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* Handle 'x' and 't' modes.
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*/
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void
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read_archive(struct bsdtar *bsdtar, char mode)
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{
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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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const char *name;
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int r;
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while (*bsdtar->argv) {
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include(bsdtar, *bsdtar->argv);
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bsdtar->argv++;
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}
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format = -1;
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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_all(a);
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if (archive_read_open_file(a, bsdtar->filename, bsdtar->bytes_per_block))
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bsdtar_errc(1, 0, "Error opening archive: %s",
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archive_error_string(a));
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if (bsdtar->verbose > 2)
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fprintf(stdout, "Compression: %s\n",
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archive_compression_name(a));
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if (bsdtar->start_dir != NULL && chdir(bsdtar->start_dir))
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bsdtar_errc(1, errno, "chdir(%s) failed", bsdtar->start_dir);
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for (;;) {
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/* Support --fast-read option */
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if (bsdtar->option_fast_read &&
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unmatched_inclusions(bsdtar) == 0)
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break;
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r = archive_read_next_header(a, &entry);
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if (r == ARCHIVE_EOF)
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break;
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if (r == ARCHIVE_WARN)
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bsdtar_warnc(0, "%s", archive_error_string(a));
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if (r == ARCHIVE_FATAL) {
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bsdtar_warnc(0, "%s", archive_error_string(a));
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break;
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}
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if (r == ARCHIVE_RETRY) {
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/* Retryable error: try again */
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bsdtar_warnc(0, "%s", archive_error_string(a));
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bsdtar_warnc(0, "Retrying...");
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continue;
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}
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if (bsdtar->verbose > 2 && format != archive_format(a)) {
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format = archive_format(a);
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fprintf(stdout, "Archive Format: %s\n",
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archive_format_name(a));
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}
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if (excluded(bsdtar, archive_entry_pathname(entry)))
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continue;
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name = archive_entry_pathname(entry);
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if (name[0] == '/' && !bsdtar->option_absolute_paths) {
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name++;
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archive_entry_set_pathname(entry, name);
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}
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if (mode == 't') {
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if (bsdtar->verbose < 2)
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safe_fprintf(stdout, "%s",
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archive_entry_pathname(entry));
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else
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list_item_verbose(bsdtar, entry);
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fflush(stdout);
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switch (archive_read_data_skip(a)) {
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case ARCHIVE_OK:
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break;
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case ARCHIVE_WARN:
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case ARCHIVE_RETRY:
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fprintf(stdout, "\n");
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bsdtar_warnc(0, "%s", archive_error_string(a));
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break;
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case ARCHIVE_FATAL:
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fprintf(stdout, "\n");
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bsdtar_errc(1, 0, "%s",
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archive_error_string(a));
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break;
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}
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fprintf(stdout, "\n");
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} else {
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if (bsdtar->option_interactive &&
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!yes("extract '%s'", archive_entry_pathname(entry)))
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continue;
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/*
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* Format here is from SUSv2, including the
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* deferred '\n'.
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*/
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if (bsdtar->verbose) {
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safe_fprintf(stderr, "x %s",
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archive_entry_pathname(entry));
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fflush(stderr);
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}
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if (bsdtar->option_stdout) {
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/* TODO: Catch/recover any errors here. */
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archive_read_data_into_fd(a, 1);
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} else if (archive_read_extract(a, entry,
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bsdtar->extract_flags)) {
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if (!bsdtar->verbose)
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safe_fprintf(stderr, "%s",
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archive_entry_pathname(entry));
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safe_fprintf(stderr, ": %s",
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archive_error_string(a));
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if (!bsdtar->verbose)
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fprintf(stderr, "\n");
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/*
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* TODO: Decide how to handle
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* extraction error... <sigh>
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*/
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}
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if (bsdtar->verbose)
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fprintf(stderr, "\n");
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}
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}
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archive_read_finish(a);
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}
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/*
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* Display information about the current file.
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*
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* The format here roughly duplicates the output of 'ls -l'.
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* This is based on SUSv2, where 'tar tv' is documented as
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* listing additional information in an "unspecified format,"
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* and 'pax -l' is documented as using the same format as 'ls -l'.
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*/
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static void
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list_item_verbose(struct bsdtar *bsdtar, struct archive_entry *entry)
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{
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FILE *out = stdout;
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const struct stat *st;
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char tmp[100];
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size_t w;
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const char *p;
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time_t tim;
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static time_t now;
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st = archive_entry_stat(entry);
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/*
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* We avoid collecting the entire list in memory at once by
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* listing things as we see them. However, that also means we can't
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* just pre-compute the field widths. Instead, we start with guesses
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* and just widen them as necessary. These numbers are completely
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* arbitrary.
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*/
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if (!bsdtar->u_width) {
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bsdtar->u_width = 6;
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bsdtar->gs_width = 13;
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}
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if (!now)
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time(&now);
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strmode(st->st_mode, tmp);
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fprintf(out, "%s %d ", tmp, st->st_nlink);
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/* Use uname if it's present, else uid. */
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w = 0;
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p = archive_entry_uname(entry);
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if (p && *p) {
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sprintf(tmp, "%s ", p);
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} else {
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sprintf(tmp, "%d ", st->st_uid);
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}
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w = strlen(tmp);
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if (w > bsdtar->u_width)
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bsdtar->u_width = w;
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fprintf(out, "%-*s", (int)bsdtar->u_width, tmp);
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/* Use gname if it's present, else gid. */
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w = 0;
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p = archive_entry_gname(entry);
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if (p && *p) {
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fprintf(out, "%s", p);
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w += strlen(p);
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} else {
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sprintf(tmp, "%d", st->st_gid);
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w += strlen(tmp);
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fprintf(out, "%s", tmp);
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}
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/*
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* Print device number or file size, right-aligned so as to make
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* total width of group and devnum/filesize fields be gs_width.
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* If gs_width is too small, grow it.
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*/
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if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) {
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sprintf(tmp, "%u,%u", major(st->st_rdev), minor(st->st_rdev));
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} else {
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/*
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* Note the use of platform-dependent macros to format
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* the filesize here. We need the format string and the
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* corresponding type for the cast.
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*/
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sprintf(tmp, BSDTAR_FILESIZE_PRINTF,
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(BSDTAR_FILESIZE_TYPE)st->st_size);
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}
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if (w + strlen(tmp) >= bsdtar->gs_width)
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bsdtar->gs_width = w+strlen(tmp)+1;
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fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp);
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/* Format the time using 'ls -l' conventions. */
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tim = (time_t)st->st_mtime;
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if (tim < now - 6*30*24*60*60 || tim > now + 6*30*24*60*60)
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strftime(tmp, sizeof(tmp), "%b %e %Y", localtime(&tim));
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else
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strftime(tmp, sizeof(tmp), "%b %e %R", localtime(&tim));
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safe_fprintf(out, " %s %s", tmp, archive_entry_pathname(entry));
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/* Extra information for links. */
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if (archive_entry_hardlink(entry)) /* Hard link */
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safe_fprintf(out, " link to %s",
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archive_entry_hardlink(entry));
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else if (S_ISLNK(st->st_mode)) /* Symbolic link */
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safe_fprintf(out, " -> %s", archive_entry_symlink(entry));
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}
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