1 /* $NetBSD: unbzip2.c,v 1.14 2017/08/04 07:27:08 mrg Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
6 * Copyright (c) 2006 The NetBSD Foundation, Inc.
9 * This code is derived from software contributed to The NetBSD Foundation
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
36 /* This file is #included by gzip.c */
39 unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
41 int ret, end_of_file, cold = 0;
44 static char *inbuf, *outbuf;
47 inbuf = malloc(BUFLEN);
49 outbuf = malloc(BUFLEN);
50 if (inbuf == NULL || outbuf == NULL)
58 ret = BZ2_bzDecompressInit(&bzs, 0, 0);
60 maybe_errx("bzip2 init");
63 bzs.avail_in = prelen;
69 while (ret == BZ_OK) {
71 if (bzs.avail_in == 0 && !end_of_file) {
74 n = read(in, inbuf, BUFLEN);
86 bzs.next_out = outbuf;
87 bzs.avail_out = BUFLEN;
88 ret = BZ2_bzDecompress(&bzs);
93 if (ret == BZ_OK && end_of_file) {
95 * If we hit this after a stream end, consider
96 * it as the end of the whole file and don't
102 maybe_errx("truncated file");
105 if (!tflag && bzs.avail_out != BUFLEN) {
108 n = write(out, outbuf, BUFLEN - bzs.avail_out);
113 if (ret == BZ_STREAM_END && !end_of_file) {
114 if (BZ2_bzDecompressEnd(&bzs) != BZ_OK ||
115 BZ2_bzDecompressInit(&bzs, 0, 0) != BZ_OK)
116 maybe_errx("bzip2 re-init");
123 maybe_warnx("bzip2 data integrity error");
126 case BZ_DATA_ERROR_MAGIC:
127 maybe_warnx("bzip2 magic number error");
131 maybe_warnx("bzip2 out of memory");
135 maybe_warnx("unknown bzip2 error: %d", ret);
140 if (ret != BZ_STREAM_END || BZ2_bzDecompressEnd(&bzs) != BZ_OK)