1 /*
2 * Copyright (c) 2025 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29 /* compile: xcrun -sdk macosx.internal clang -ldarwintest -o pwrite_appendonly pwrite_appendonly.c -g -Weverything */
30
31 #include <fcntl.h>
32 #include <unistd.h>
33 #include <sys/stat.h>
34 #include <sys/syslimits.h>
35
36 #include <darwintest.h>
37 #include <darwintest/utils.h>
38
39
40 T_GLOBAL_META(
41 T_META_NAMESPACE("xnu.vfs"),
42 T_META_RADAR_COMPONENT_NAME("xnu"),
43 T_META_RADAR_COMPONENT_VERSION("vfs"),
44 T_META_ASROOT(false),
45 T_META_CHECK_LEAKS(false),
46 T_META_TAG_VM_PREFERRED);
47
48 #define TEST_DIR "testdir"
49 #define TEST_FILE "testfile"
50
51 static char g_testfile[MAXPATHLEN];
52 static char g_testdir[MAXPATHLEN];
53
54
55 static void
exit_cleanup(void)56 exit_cleanup(void)
57 {
58 (void)remove(g_testfile);
59 (void)rmdir(g_testdir);
60 }
61
62 static void
create_test_file(void)63 create_test_file(void)
64 {
65 const char *tmpdir = dt_tmpdir();
66 int fd;
67
68 T_SETUPBEGIN;
69
70 atexit(exit_cleanup);
71
72 snprintf(g_testdir, MAXPATHLEN, "%s/%s", tmpdir, TEST_DIR);
73
74 T_ASSERT_POSIX_SUCCESS(mkdir(g_testdir, 0777),
75 "Setup: creating test dir: %s", g_testdir);
76
77 snprintf(g_testfile, MAXPATHLEN, "%s/%s", g_testdir, TEST_FILE);
78
79 T_WITH_ERRNO;
80 fd = open(g_testfile, O_CREAT | O_RDWR, 0666);
81 T_ASSERT_NE(fd, -1, "Create test fi1e: %s", g_testfile);
82
83 T_ASSERT_POSIX_SUCCESS(close(fd), "Close test file: %s", TEST_FILE);
84
85 T_SETUPEND;
86 }
87
88 T_DECL(pwrite_append, "Validate pwrite to arbitrary offsets should fail on append-only file")
89 {
90 char buf[32];
91 ssize_t ret;
92 int err, fd;
93
94 create_test_file();
95
96 T_WITH_ERRNO;
97 err = chflags(g_testfile, UF_APPEND);
98 T_ASSERT_NE(err, -1, "Enable append-only on file: %s", g_testfile);
99
100 T_WITH_ERRNO;
101 fd = open(g_testfile, O_RDWR | O_APPEND);
102 T_ASSERT_NE(fd, -1, "Open test fi1e in O_RDWR|O_APPEND: %s", g_testfile);
103
104 T_WITH_ERRNO;
105 ret = pwrite(fd, &buf, 16, 8);
106 T_ASSERT_TRUE((ret == -1) && (errno == EPERM), "Write on append-only file: %s", g_testfile);
107
108 T_WITH_ERRNO;
109 err = ftruncate(fd, 100);
110 T_ASSERT_TRUE((err == -1) && (errno == EPERM), "Truncate on append-only file: %s", g_testfile);
111
112 T_WITH_ERRNO;
113 err = chflags(g_testfile, 0);
114 T_ASSERT_NE(err, -1, "Disable append-only on file: %s", g_testfile);
115
116 T_WITH_ERRNO;
117 ret = pwrite(fd, &buf, 16, 8);
118 T_ASSERT_EQ(ret, 16, "Write on file: %s", g_testfile);
119
120 T_WITH_ERRNO;
121 err = ftruncate(fd, 100);
122 T_ASSERT_NE(err, -1, "Truncate on file: %s", g_testfile);
123 }
124