From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001
From: Cameron Katri <me@cameronkatri.com>
Date: Sun, 9 May 2021 14:20:58 -0400
Subject: Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
---
 file_cmds/gzip/unbzip2.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 file_cmds/gzip/unbzip2.c

(limited to 'file_cmds/gzip/unbzip2.c')

diff --git a/file_cmds/gzip/unbzip2.c b/file_cmds/gzip/unbzip2.c
new file mode 100644
index 0000000..4192e9b
--- /dev/null
+++ b/file_cmds/gzip/unbzip2.c
@@ -0,0 +1,141 @@
+/*	$NetBSD: unbzip2.c,v 1.13 2009/12/05 03:23:37 mrg Exp $	*/
+
+/*-
+ * Copyright (c) 2006 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Simon Burge.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD: src/usr.bin/gzip/unbzip2.c,v 1.5 2010/04/07 22:54:53 delphij Exp $
+ */
+
+/* This file is #included by gzip.c */
+
+static off_t
+unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
+{
+	int		ret, end_of_file, cold = 0;
+	off_t		bytes_out = 0;
+	bz_stream	bzs;
+	static char	*inbuf, *outbuf;
+
+	if (inbuf == NULL)
+		inbuf = malloc(BUFLEN);
+	if (outbuf == NULL)
+		outbuf = malloc(BUFLEN);
+	if (inbuf == NULL || outbuf == NULL)
+	        maybe_err("malloc");
+
+	bzs.bzalloc = NULL;
+	bzs.bzfree = NULL;
+	bzs.opaque = NULL;
+
+	end_of_file = 0;
+	ret = BZ2_bzDecompressInit(&bzs, 0, 0);
+	if (ret != BZ_OK)
+	        maybe_errx("bzip2 init");
+
+	/* Prepend. */
+	bzs.avail_in = prelen;
+	bzs.next_in = pre;
+
+	if (bytes_in)
+		*bytes_in = prelen;
+
+	while (ret == BZ_OK) {
+	        if (bzs.avail_in == 0 && !end_of_file) {
+			ssize_t	n;
+
+	                n = read(in, inbuf, BUFLEN);
+	                if (n < 0)
+	                        maybe_err("read");
+	                if (n == 0)
+	                        end_of_file = 1;
+	                bzs.next_in = inbuf;
+	                bzs.avail_in = n;
+			if (bytes_in)
+				*bytes_in += n;
+	        }
+
+	        bzs.next_out = outbuf;
+	        bzs.avail_out = BUFLEN;
+	        ret = BZ2_bzDecompress(&bzs);
+
+	        switch (ret) {
+	        case BZ_STREAM_END:
+	        case BZ_OK:
+	                if (ret == BZ_OK && end_of_file) {
+				/*
+				 * If we hit this after a stream end, consider
+				 * it as the end of the whole file and don't
+				 * bail out.
+				 */
+				if (cold == 1)
+					ret = BZ_STREAM_END;
+				else
+					maybe_errx("truncated file");
+			}
+			cold = 0;
+	                if (!tflag && bzs.avail_out != BUFLEN) {
+				ssize_t	n;
+
+	                        n = write(out, outbuf, BUFLEN - bzs.avail_out);
+	                        if (n < 0)
+	                                maybe_err("write");
+	                	bytes_out += n;
+	                }
+			if (ret == BZ_STREAM_END && !end_of_file) {
+				if (BZ2_bzDecompressEnd(&bzs) != BZ_OK ||
+				    BZ2_bzDecompressInit(&bzs, 0, 0) != BZ_OK)
+					maybe_errx("bzip2 re-init");
+				cold = 1;
+				ret = BZ_OK;
+			}
+			break;
+
+	        case BZ_DATA_ERROR:
+	                maybe_warnx("bzip2 data integrity error");
+			break;
+
+	        case BZ_DATA_ERROR_MAGIC:
+	                maybe_warnx("bzip2 magic number error");
+			break;
+
+	        case BZ_MEM_ERROR:
+	                maybe_warnx("bzip2 out of memory");
+			break;
+		
+		default:	
+			maybe_warnx("unknown bzip2 error: %d", ret);
+			break;
+	        }
+	}
+
+	if (ret != BZ_STREAM_END || BZ2_bzDecompressEnd(&bzs) != BZ_OK)
+	        return (-1);
+
+	return (bytes_out);
+}
+
-- 
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