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https://git.busybox.net/busybox.git
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128 lines
3.6 KiB
C
128 lines
3.6 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 <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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const int preserve_date = 1; /* preserve original dates */
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const int verbose = 2; /* be verbose */
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const int display = 4; /* display contents */
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const int extract_to_file = 8; /* extract contents of archive */
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const int extract_to_stdout = 16; /* extract to stdout */
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FILE *src_file = NULL, *dst_file = NULL;
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int funct = 0, opt=0;
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ar_headers_t *head, *ar_extract_list=NULL;
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ar_extract_list = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
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head = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
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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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funct |= preserve_date;
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break;
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case 'v':
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funct |= verbose;
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break;
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case 't':
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funct |= display;
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break;
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case 'p':
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funct |= extract_to_stdout;
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break;
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case 'x':
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funct |= extract_to_file;
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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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if ( (src_file = wfopen(argv[optind], "r")) < 0) {
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error_msg_and_die("Cannot read %s", argv[optind]);
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}
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optind++;
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head = get_ar_headers(src_file);
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/* find files to extract or display */
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/* search through argv and build extract list */
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for (;optind < argc; optind++) {
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ar_headers_t *ar_entry;
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ar_entry = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
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ar_entry = head;
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while (ar_entry->next != NULL) {
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if (strcmp(argv[optind], ar_entry->name) == 0) {
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ar_headers_t *tmp;
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tmp = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
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*tmp = *ar_extract_list;
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*ar_extract_list = *ar_entry;
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ar_extract_list->next = tmp;
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break;
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}
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ar_entry=ar_entry->next;
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}
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}
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/* if individual files not found extract all files */
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if (ar_extract_list->next==NULL) {
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ar_extract_list = head;
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}
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/* find files to extract or display */
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while (ar_extract_list->next != NULL) {
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if (funct & extract_to_file) {
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dst_file = wfopen(ar_extract_list->name, "w");
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}
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else if (funct & extract_to_stdout) {
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dst_file = stdout;
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}
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if ((funct & extract_to_file) || (funct & extract_to_stdout)) {
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fseek(src_file, ar_extract_list->offset, SEEK_SET);
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copy_file_chunk(src_file, dst_file, ar_extract_list->size);
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}
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if (funct & verbose) {
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printf("%s %d/%d %8d %s ", mode_string(ar_extract_list->mode),
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ar_extract_list->uid, ar_extract_list->gid,
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(int) ar_extract_list->size, time_string(ar_extract_list->mtime));
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}
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if ((funct & display) || (funct & verbose)){
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puts(ar_extract_list->name);
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}
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ar_extract_list = ar_extract_list->next;
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}
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return EXIT_SUCCESS;
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}
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