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90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini ar implementation for busybox
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*
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* Copyright (C) 2000 by Glenn McGrath
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* Written by Glenn McGrath <bug1@optushome.com.au> 1 June 2000
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*
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* Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <unistd.h>
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#include "busybox.h"
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extern int ar_main(int argc, char **argv)
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{
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FILE *src_stream = NULL;
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char **extract_names = NULL;
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char ar_magic[8];
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int extract_function = 0;
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int opt;
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int num_of_entries = 0;
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extern off_t archive_offset;
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while ((opt = getopt(argc, argv, "ovtpx")) != -1) {
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switch (opt) {
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case 'o':
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extract_function |= extract_preserve_date;
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break;
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case 'v':
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extract_function |= extract_verbose_list;
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break;
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case 't':
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extract_function |= extract_list;
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break;
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case 'p':
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extract_function |= extract_to_stdout;
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break;
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case 'x':
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extract_function |= extract_all_to_fs;
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break;
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default:
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show_usage();
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}
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}
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/* check the src filename was specified */
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if (optind == argc) {
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show_usage();
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}
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src_stream = xfopen(argv[optind++], "r");
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/* check ar magic */
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fread(ar_magic, 1, 8, src_stream);
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if (strncmp(ar_magic,"!<arch>",7) != 0) {
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error_msg_and_die("invalid magic");
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}
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archive_offset = 8;
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extract_names = malloc(sizeof(char *));
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extract_names[0] = NULL;
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while (optind < argc) {
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num_of_entries++;
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*extract_names = realloc(*extract_names, num_of_entries);
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extract_names[num_of_entries - 1] = xstrdup(argv[optind]);
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optind++;
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}
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unarchive(src_stream, &get_header_ar, extract_function, "./", extract_names);
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return EXIT_SUCCESS;
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}
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