source: MondoRescue/trunk/mindi-busybox/archival/cpio.c@ 954

/* vi: set sw=4 ts=4: */
/*
 * Mini cpio implementation for busybox
 *
 * Copyright (C) 2001 by Glenn McGrath
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Limitations:
 *      Doesn't check CRC's
 *      Only supports new ASCII and CRC formats
 *
 */
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "unarchive.h"
#include "busybox.h"

#define CPIO_OPT_EXTRACT            0x01
#define CPIO_OPT_TEST               0x02
#define CPIO_OPT_UNCONDITIONAL      0x04
#define CPIO_OPT_VERBOSE            0x08
#define CPIO_OPT_FILE               0x10
#define CPIO_OPT_CREATE_LEADING_DIR 0x20
#define CPIO_OPT_PRESERVE_MTIME     0x40

int cpio_main(int argc, char **argv)
{
    archive_handle_t *archive_handle;
    char *cpio_filename = NULL;
    unsigned long opt;

    /* Initialise */
    archive_handle = init_handle();
    archive_handle->src_fd = STDIN_FILENO;
    archive_handle->seek = seek_by_char;
    archive_handle->flags = ARCHIVE_EXTRACT_NEWER | ARCHIVE_PRESERVE_DATE;

    opt = bb_getopt_ulflags(argc, argv, "ituvF:dm", &cpio_filename);

    /* One of either extract or test options must be given */
    if ((opt & (CPIO_OPT_TEST | CPIO_OPT_EXTRACT)) == 0) {
        bb_show_usage();
    }

    if (opt & CPIO_OPT_TEST) {
        /* if both extract and test options are given, ignore extract option */
        if (opt & CPIO_OPT_EXTRACT) {
            opt &= ~CPIO_OPT_EXTRACT;
        }
        archive_handle->action_header = header_list;
    }
    if (opt & CPIO_OPT_EXTRACT) {
        archive_handle->action_data = data_extract_all;
    }
    if (opt & CPIO_OPT_UNCONDITIONAL) {
        archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
        archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER;
    }
    if (opt & CPIO_OPT_VERBOSE) {
        if (archive_handle->action_header == header_list) {
            archive_handle->action_header = header_verbose_list;
        } else {
            archive_handle->action_header = header_list;
        }
    }
    if (cpio_filename) { /* CPIO_OPT_FILE */
        archive_handle->src_fd = bb_xopen(cpio_filename, O_RDONLY);
        archive_handle->seek = seek_by_jump;
    }
    if (opt & CPIO_OPT_CREATE_LEADING_DIR) {
        archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
    }

    while (optind < argc) {
        archive_handle->filter = filter_accept_list;
        llist_add_to(&(archive_handle->accept), argv[optind]);
        optind++;
    }

    while (get_header_cpio(archive_handle) == EXIT_SUCCESS);

    return(EXIT_SUCCESS);
}