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
27DEFINE_TEST(test_empty_write)
28{
29	char buff[32768];
30	struct archive_entry *ae;
31	struct archive *a;
32	size_t used;
33	int r;
34
35	/*
36	 * Exercise a zero-byte write to a gzip-compressed archive.
37	 */
38
39	/* Create a new archive in memory. */
40	assert((a = archive_write_new()) != NULL);
41	assertA(0 == archive_write_set_format_ustar(a));
42	r = archive_write_add_filter_gzip(a);
43	if (r != ARCHIVE_OK && !canGzip()) {
44		skipping("Empty write to gzip-compressed archive");
45	} else {
46		if (r != ARCHIVE_OK && canGzip())
47			assertEqualIntA(a, ARCHIVE_WARN, r);
48		else
49			assertEqualIntA(a, ARCHIVE_OK, r);
50		assertEqualIntA(a, ARCHIVE_OK,
51		    archive_write_open_memory(a, buff, sizeof(buff), &used));
52		/* Write a file to it. */
53		assert((ae = archive_entry_new()) != NULL);
54		archive_entry_copy_pathname(ae, "file");
55		archive_entry_set_mode(ae, S_IFREG | 0755);
56		archive_entry_set_size(ae, 0);
57		assertA(0 == archive_write_header(a, ae));
58		archive_entry_free(ae);
59
60		/* THE TEST: write zero bytes to this entry. */
61		/* This used to crash. */
62		assertEqualIntA(a, 0, archive_write_data(a, "", 0));
63
64		/* Close out the archive. */
65		assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
66		assertEqualInt(ARCHIVE_OK, archive_write_free(a));
67	}
68
69	/*
70	 * Again, with bzip2 compression.
71	 */
72
73	/* Create a new archive in memory. */
74	assert((a = archive_write_new()) != NULL);
75	assertA(0 == archive_write_set_format_ustar(a));
76	r = archive_write_add_filter_bzip2(a);
77	if (r != ARCHIVE_OK && !canBzip2()) {
78		skipping("Empty write to bzip2-compressed archive");
79	} else {
80		if (r != ARCHIVE_OK && canBzip2())
81			assertEqualIntA(a, ARCHIVE_WARN, r);
82		else
83			assertEqualIntA(a, ARCHIVE_OK, r);
84		assertEqualIntA(a, ARCHIVE_OK,
85		    archive_write_open_memory(a, buff, sizeof(buff), &used));
86		/* Write a file to it. */
87		assert((ae = archive_entry_new()) != NULL);
88		archive_entry_copy_pathname(ae, "file");
89		archive_entry_set_mode(ae, S_IFREG | 0755);
90		archive_entry_set_size(ae, 0);
91		assertA(0 == archive_write_header(a, ae));
92		archive_entry_free(ae);
93
94		/* THE TEST: write zero bytes to this entry. */
95		assertEqualIntA(a, 0, archive_write_data(a, "", 0));
96
97		/* Close out the archive. */
98		assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
99		assertEqualInt(ARCHIVE_OK, archive_write_free(a));
100	}
101
102	/*
103	 * For good measure, one more time with no compression.
104	 */
105
106	/* Create a new archive in memory. */
107	assert((a = archive_write_new()) != NULL);
108	assertA(0 == archive_write_set_format_ustar(a));
109	assertA(0 == archive_write_add_filter_none(a));
110	assertA(0 == archive_write_open_memory(a, buff, sizeof(buff), &used));
111	/* Write a file to it. */
112	assert((ae = archive_entry_new()) != NULL);
113	archive_entry_copy_pathname(ae, "file");
114	archive_entry_set_mode(ae, S_IFREG | 0755);
115	archive_entry_set_size(ae, 0);
116	assertA(0 == archive_write_header(a, ae));
117	archive_entry_free(ae);
118
119	/* THE TEST: write zero bytes to this entry. */
120	assertEqualIntA(a, 0, archive_write_data(a, "", 0));
121
122	/* Close out the archive. */
123	assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
124	assertEqualInt(ARCHIVE_OK, archive_write_free(a));
125}
126