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
27 /*
28 * Background: There are two written standards for the tar file format.
29 * The first is the POSIX 1988 "ustar" format, the second is the 2001
30 * "pax extended" format that builds on the "ustar" format by adding
31 * support for generic additional attributes. Buried in the details
32 * is one frustrating incompatibility: The 1988 standard says that
33 * tar readers MUST ignore the size field on hardlink entries; the
34 * 2001 standard says that tar readers MUST obey the size field on
35 * hardlink entries. libarchive tries to navigate this particular
36 * minefield by using auto-detect logic to guess whether it should
37 * or should not obey the size field.
38 *
39 * This test tries to probe the boundaries of such handling; the test
40 * archives here were adapted from real archives created by real
41 * tar implementations that are (as of early 2008) apparently still
42 * in use.
43 */
44
45 static void
test_compat_tar_hardlink_1(void)46 test_compat_tar_hardlink_1(void)
47 {
48 char name[] = "test_compat_tar_hardlink_1.tar";
49 struct archive_entry *ae;
50 struct archive *a;
51
52 assert((a = archive_read_new()) != NULL);
53 assertEqualIntA(a, ARCHIVE_OK, archive_read_support_filter_all(a));
54 assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_all(a));
55 extract_reference_file(name);
56 assertEqualIntA(a, ARCHIVE_OK, archive_read_open_filename(a, name, 10240));
57
58 /* Read first entry, which is a regular file. */
59 assertEqualIntA(a, ARCHIVE_OK, archive_read_next_header(a, &ae));
60 assertEqualString("xmcd-3.3.2/docs_d/READMf",
61 archive_entry_pathname(ae));
62 assertEqualString(NULL, archive_entry_hardlink(ae));
63 assertEqualInt(321, archive_entry_size(ae));
64 assertEqualInt(1082575645, archive_entry_mtime(ae));
65 assertEqualInt(1851, archive_entry_uid(ae));
66 assertEqualInt(3, archive_entry_gid(ae));
67 assertEqualInt(0100444, archive_entry_mode(ae));
68
69 /* Read second entry, which is a hard link at the end of archive. */
70 assertEqualIntA(a, ARCHIVE_OK, archive_read_next_header(a, &ae));
71 assertEqualString("xmcd-3.3.2/README",
72 archive_entry_pathname(ae));
73 assertEqualString(
74 "xmcd-3.3.2/docs_d/READMf",
75 archive_entry_hardlink(ae));
76 assertEqualInt(0, archive_entry_size(ae));
77 assertEqualInt(1082575645, archive_entry_mtime(ae));
78 assertEqualInt(1851, archive_entry_uid(ae));
79 assertEqualInt(3, archive_entry_gid(ae));
80 assertEqualInt(0100444, archive_entry_mode(ae));
81
82 /* Verify the end-of-archive. */
83 /*
84 * This failed in libarchive 2.4.12 because the tar reader
85 * tried to obey the size field for the hard link and ended
86 * up running past the end of the file.
87 */
88 assertEqualIntA(a, ARCHIVE_EOF, archive_read_next_header(a, &ae));
89
90 /* Verify that the format detection worked. */
91 assertEqualInt(archive_filter_code(a, 0), ARCHIVE_FILTER_NONE);
92 assertEqualInt(archive_format(a), ARCHIVE_FORMAT_TAR);
93
94 assertEqualInt(ARCHIVE_OK, archive_read_close(a));
95 assertEqualInt(ARCHIVE_OK, archive_read_free(a));
96 }
97
DEFINE_TEST(test_compat_tar_hardlink)98 DEFINE_TEST(test_compat_tar_hardlink)
99 {
100 test_compat_tar_hardlink_1();
101 }
102
103
104