2 * Simple XZ decoder command line tool
4 * Author: Lasse Collin <lasse.collin@tukaani.org>
6 * This file has been put into the public domain.
7 * You can do whatever you want with this file.
11 * This is really limited: Not all filters from .xz format are supported,
12 * only CRC32 is supported as the integrity check, and decoding of
13 * concatenated .xz streams is not supported. Thus, you may want to look
14 * at xzdec from XZ Utils if a few KiB bigger tool is not a problem.
22 static uint8_t in[BUFSIZ];
23 static uint8_t out[BUFSIZ];
25 int main(int argc, char **argv)
32 if (argc >= 2 && strcmp(argv[1], "--help") == 0) {
33 fputs("Uncompress a .xz file from stdin to stdout.\n"
34 "Arguments other than `--help' are ignored.\n",
42 * Support up to 64 MiB dictionary. The actually needed memory
43 * is allocated once the headers have been parsed.
45 s = xz_dec_init(XZ_DYNALLOC, 1 << 26);
47 msg = "Memory allocation failed\n";
59 if (b.in_pos == b.in_size) {
60 b.in_size = fread(in, 1, sizeof(in), stdin);
64 ret = xz_dec_run(s, &b);
66 if (b.out_pos == sizeof(out)) {
67 if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos) {
68 msg = "Write error\n";
78 #ifdef XZ_DEC_ANY_CHECK
79 if (ret == XZ_UNSUPPORTED_CHECK) {
80 fputs(argv[0], stderr);
82 fputs("Unsupported check; not verifying "
83 "file integrity\n", stderr);
88 if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos
90 msg = "Write error\n";
100 msg = "Memory allocation failed\n";
103 case XZ_MEMLIMIT_ERROR:
104 msg = "Memory usage limit reached\n";
107 case XZ_FORMAT_ERROR:
108 msg = "Not a .xz file\n";
111 case XZ_OPTIONS_ERROR:
112 msg = "Unsupported options in the .xz headers\n";
117 msg = "File is corrupt\n";
128 fputs(argv[0], stderr);