1/*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25#include "test.h"
26__FBSDID("$FreeBSD: head/lib/libarchive/test/test_empty_write.c 189308 2009-03-03 17:02:51Z kientzle $");
27
28DEFINE_TEST(test_empty_write)
29{
30	char buff[32768];
31	struct archive_entry *ae;
32	struct archive *a;
33	size_t used;
34	int r;
35
36	/*
37	 * Exercise a zero-byte write to a gzip-compressed archive.
38	 */
39
40	/* Create a new archive in memory. */
41	assert((a = archive_write_new()) != NULL);
42	assertA(0 == archive_write_set_format_ustar(a));
43	r = archive_write_set_compression_gzip(a);
44	if (r == ARCHIVE_FATAL) {
45		skipping("Empty write to gzip-compressed archive");
46	} else {
47		assertEqualIntA(a, ARCHIVE_OK, r);
48		assertEqualIntA(a, ARCHIVE_OK,
49		    archive_write_open_memory(a, buff, sizeof(buff), &used));
50		/* Write a file to it. */
51		assert((ae = archive_entry_new()) != NULL);
52		archive_entry_copy_pathname(ae, "file");
53		archive_entry_set_mode(ae, S_IFREG | 0755);
54		archive_entry_set_size(ae, 0);
55		assertA(0 == archive_write_header(a, ae));
56		archive_entry_free(ae);
57
58		/* THE TEST: write zero bytes to this entry. */
59		/* This used to crash. */
60		assertEqualIntA(a, 0, archive_write_data(a, "", 0));
61
62		/* Close out the archive. */
63		assertA(0 == archive_write_close(a));
64		assertA(0 == archive_write_finish(a));
65	}
66
67	/*
68	 * Again, with bzip2 compression.
69	 */
70
71	/* Create a new archive in memory. */
72	assert((a = archive_write_new()) != NULL);
73	assertA(0 == archive_write_set_format_ustar(a));
74	r = archive_write_set_compression_bzip2(a);
75	if (r == ARCHIVE_FATAL) {
76		skipping("Empty write to bzip2-compressed archive");
77	} else {
78		assertEqualIntA(a, ARCHIVE_OK, r);
79		assertEqualIntA(a, ARCHIVE_OK,
80		    archive_write_open_memory(a, buff, sizeof(buff), &used));
81		/* Write a file to it. */
82		assert((ae = archive_entry_new()) != NULL);
83		archive_entry_copy_pathname(ae, "file");
84		archive_entry_set_mode(ae, S_IFREG | 0755);
85		archive_entry_set_size(ae, 0);
86		assertA(0 == archive_write_header(a, ae));
87		archive_entry_free(ae);
88
89		/* THE TEST: write zero bytes to this entry. */
90		assertEqualIntA(a, 0, archive_write_data(a, "", 0));
91
92		/* Close out the archive. */
93		assertA(0 == archive_write_close(a));
94		assertA(0 == archive_write_finish(a));
95	}
96
97	/*
98	 * For good measure, one more time with no compression.
99	 */
100
101	/* Create a new archive in memory. */
102	assert((a = archive_write_new()) != NULL);
103	assertA(0 == archive_write_set_format_ustar(a));
104	assertA(0 == archive_write_set_compression_none(a));
105	assertA(0 == archive_write_open_memory(a, buff, sizeof(buff), &used));
106	/* Write a file to it. */
107	assert((ae = archive_entry_new()) != NULL);
108	archive_entry_copy_pathname(ae, "file");
109	archive_entry_set_mode(ae, S_IFREG | 0755);
110	archive_entry_set_size(ae, 0);
111	assertA(0 == archive_write_header(a, ae));
112	archive_entry_free(ae);
113
114	/* THE TEST: write zero bytes to this entry. */
115	assertEqualIntA(a, 0, archive_write_data(a, "", 0));
116
117	/* Close out the archive. */
118	assertA(0 == archive_write_close(a));
119	assertA(0 == archive_write_finish(a));
120}
121