126 lines
3.5 KiB
C
126 lines
3.5 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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int funct = 0, opt=0;
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int srcFd=0, dstFd=0;
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ar_headers_t head, *extract_list=NULL;
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extract_list = (ar_headers_t *) xmalloc(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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if ( (srcFd = open(argv[optind], O_RDONLY)) < 0)
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error_msg_and_die("Cannot read %s", argv[optind]);
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optind++;
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head = get_ar_headers(srcFd);
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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 *) xmalloc(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 = *extract_list;
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*extract_list = *ar_entry;
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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 (extract_list->next==NULL) {
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extract_list = &head;
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}
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/* find files to extract or display */
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while (extract_list->next != NULL) {
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if (funct & extract_to_file) {
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dstFd = open(extract_list->name, O_WRONLY | O_CREAT, extract_list->mode);
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}
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else if (funct & extract_to_stdout) {
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dstFd = fileno(stdout);
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}
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if ((funct & extract_to_file) || (funct & extract_to_stdout)) {
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lseek(srcFd, extract_list->offset, SEEK_SET);
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copy_file_chunk(srcFd, dstFd, (off_t) 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(extract_list->mode),
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extract_list->uid, extract_list->gid,
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(int) extract_list->size, time_string(extract_list->mtime));
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}
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if ((funct & display) || (funct & verbose)){
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printf("%s\n", extract_list->name);
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}
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extract_list=extract_list->next;
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}
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return EXIT_SUCCESS;
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}
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