1 /* $NetBSD: unbzip2.c,v 1.13 2009/12/05 03:23:37 mrg Exp $ */
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
34 /* This file is #included by gzip.c */
37 unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
39 int ret, end_of_file, cold = 0;
42 static char *inbuf, *outbuf;
45 inbuf = malloc(BUFLEN);
47 outbuf = malloc(BUFLEN);
48 if (inbuf == NULL || outbuf == NULL)
56 ret = BZ2_bzDecompressInit(&bzs, 0, 0);
58 maybe_errx("bzip2 init");
61 bzs.avail_in = prelen;
67 while (ret == BZ_OK) {
68 if (bzs.avail_in == 0 && !end_of_file) {
71 n = read(in, inbuf, BUFLEN);
82 bzs.next_out = outbuf;
83 bzs.avail_out = BUFLEN;
84 ret = BZ2_bzDecompress(&bzs);
89 if (ret == BZ_OK && end_of_file) {
91 * If we hit this after a stream end, consider
92 * it as the end of the whole file and don't
98 maybe_errx("truncated file");
101 if (!tflag && bzs.avail_out != BUFLEN) {
104 n = write(out, outbuf, BUFLEN - bzs.avail_out);
109 if (ret == BZ_STREAM_END && !end_of_file) {
110 if (BZ2_bzDecompressEnd(&bzs) != BZ_OK ||
111 BZ2_bzDecompressInit(&bzs, 0, 0) != BZ_OK)
112 maybe_errx("bzip2 re-init");
119 maybe_warnx("bzip2 data integrity error");
122 case BZ_DATA_ERROR_MAGIC:
123 maybe_warnx("bzip2 magic number error");
127 maybe_warnx("bzip2 out of memory");
131 maybe_warnx("unknown bzip2 error: %d", ret);
136 if (ret != BZ_STREAM_END || BZ2_bzDecompressEnd(&bzs) != BZ_OK)