1 /* vi: set sw=4 ts=4: */
3 * Uncompress applet for busybox (c) 2002 Glenn McGrath
5 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 #define GUNZIP_TO_STDOUT 1
12 #define GUNZIP_FORCE 2
14 int uncompress_main(int argc, char **argv)
16 int status = EXIT_SUCCESS;
19 flags = bb_getopt_ulflags(argc, argv, "cf");
21 while (optind < argc) {
22 char *compressed_file = argv[optind++];
23 char *delete_path = NULL;
24 char *uncompressed_file = NULL;
28 if (strcmp(compressed_file, "-") == 0) {
29 src_fd = STDIN_FILENO;
30 flags |= GUNZIP_TO_STDOUT;
32 src_fd = xopen(compressed_file, O_RDONLY);
35 /* Check that the input is sane. */
36 if (isatty(src_fd) && ((flags & GUNZIP_FORCE) == 0)) {
38 ("compressed data not read from terminal. Use -f to force it.");
41 /* Set output filename and number */
42 if (flags & GUNZIP_TO_STDOUT) {
43 dst_fd = STDOUT_FILENO;
48 uncompressed_file = xstrdup(compressed_file);
50 extension = strrchr(uncompressed_file, '.');
51 if (!extension || (strcmp(extension, ".Z") != 0)) {
52 bb_error_msg_and_die("Invalid extension");
56 /* Open output file */
57 xstat(compressed_file, &stat_buf);
58 dst_fd = xopen3(uncompressed_file,
59 O_WRONLY | O_CREAT | O_TRUNC,
62 /* If unzip succeeds remove the old file */
63 delete_path = compressed_file;
66 /* do the decompression, and cleanup */
67 if ((xread_char(src_fd) != 0x1f) || (xread_char(src_fd) != 0x9d)) {
68 bb_error_msg_and_die("Invalid magic");
71 status = uncompress(src_fd, dst_fd);
73 if ((status != EXIT_SUCCESS) && (uncompressed_file)) {
74 /* Unzip failed, remove the uncomressed file instead of compressed file */
75 delete_path = uncompressed_file;
78 if (dst_fd != STDOUT_FILENO) {
81 if (src_fd != STDIN_FILENO) {
85 /* delete_path will be NULL if in test mode or from stdin */
86 if (delete_path && (unlink(delete_path) == -1)) {
87 bb_error_msg_and_die("Couldn't remove %s", delete_path);
90 free(uncompressed_file);