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134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Uncompress applet for busybox (c) 2002 Glenn McGrath
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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
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* GNU 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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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "libbb.h"
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#include "unarchive.h"
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int uncompress_main(int argc, char **argv)
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{
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const char gunzip_to_stdout = 1;
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const char gunzip_force = 2;
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char status = EXIT_SUCCESS;
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char flags = 0;
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int opt;
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while ((opt = getopt(argc, argv, "cfh")) != -1) {
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switch (opt) {
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case 'c':
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flags |= gunzip_to_stdout;
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break;
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case 'f':
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flags |= gunzip_force;
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break;
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default:
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show_usage(); /* exit's inside usage */
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}
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}
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do {
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struct stat stat_buf;
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const char *old_path = argv[optind];
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const char *delete_path = NULL;
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char *new_path = NULL;
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int src_fd;
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int dst_fd;
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optind++;
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if (old_path == NULL || strcmp(old_path, "-") == 0) {
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src_fd = fileno(stdin);
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flags |= gunzip_to_stdout;
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} else {
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src_fd = xopen(old_path, O_RDONLY);
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/* Get the time stamp on the input file. */
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if (stat(old_path, &stat_buf) < 0) {
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error_msg_and_die("Couldn't stat file %s", old_path);
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}
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}
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/* Check that the input is sane. */
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if (isatty(src_fd) && ((flags & gunzip_force) == 0)) {
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error_msg_and_die
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("compressed data not read from terminal. Use -f to force it.");
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}
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/* Set output filename and number */
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if (flags & gunzip_to_stdout) {
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dst_fd = fileno(stdout);
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} else {
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char *extension;
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new_path = xstrdup(old_path);
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extension = strrchr(new_path, '.');
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if (!extension || (strcmp(extension, ".Z") != 0)) {
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error_msg_and_die("Invalid extension");
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}
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*extension = '\0';
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/* Open output file */
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dst_fd = xopen(new_path, O_WRONLY | O_CREAT);
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/* Set permissions on the file */
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chmod(new_path, stat_buf.st_mode);
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/* If unzip succeeds remove the old file */
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delete_path = old_path;
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}
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/* do the decompression, and cleanup */
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if ((xread_char(src_fd) == 0x1f) && (xread_char(src_fd) == 0x9d)) {
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status = uncompress(src_fd, dst_fd);
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} else {
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error_msg_and_die("Invalid magic");
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}
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if ((status != EXIT_SUCCESS) && (new_path)) {
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/* Unzip failed, remove new path instead of old path */
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delete_path = new_path;
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}
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if (dst_fd != fileno(stdout)) {
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close(dst_fd);
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}
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if (src_fd != fileno(stdin)) {
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close(src_fd);
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}
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/* delete_path will be NULL if in test mode or from stdin */
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if (delete_path && (unlink(delete_path) == -1)) {
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error_msg_and_die("Couldn't remove %s", delete_path);
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}
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free(new_path);
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} while (optind < argc);
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return status;
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}
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