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42261ad7 | 1 | /* tzset tests with crafted time zone data. |
dff8da6b | 2 | Copyright (C) 2015-2024 Free Software Foundation, Inc. |
42261ad7 FW |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
42261ad7 FW |
17 | |
18 | #define _GNU_SOURCE 1 | |
19 | ||
20 | #include <errno.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/resource.h> | |
25 | #include <time.h> | |
26 | #include <unistd.h> | |
aa42b3db | 27 | #include <support/check.h> |
afbf2649 | 28 | #include <inttypes.h> |
42261ad7 FW |
29 | |
30 | static int do_test (void); | |
31 | #define TEST_FUNCTION do_test () | |
32 | #include "../test-skeleton.c" | |
33 | ||
34 | /* Returns the name of a large TZ file. */ | |
35 | static char * | |
36 | create_tz_file (off64_t size) | |
37 | { | |
38 | char *path; | |
39 | int fd = create_temp_file ("tst-tzset-", &path); | |
40 | if (fd < 0) | |
41 | exit (1); | |
aa42b3db FW |
42 | if (!support_descriptor_supports_holes (fd)) |
43 | FAIL_UNSUPPORTED ("File %s does not support holes", path); | |
42261ad7 FW |
44 | |
45 | // Reopen for large-file support. | |
46 | close (fd); | |
47 | fd = open64 (path, O_WRONLY); | |
48 | if (fd < 0) | |
49 | { | |
50 | printf ("open64 (%s) failed: %m\n", path); | |
51 | exit (1); | |
52 | } | |
53 | ||
54 | static const char data[] = { | |
55 | 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, | |
56 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
57 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, | |
58 | 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, | |
59 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, | |
60 | 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, | |
61 | 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, 0x00, | |
62 | 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, | |
63 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
64 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, | |
65 | 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, | |
66 | 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, | |
67 | 0x00, 0x00, 0x00, 0x04, 0xf8, 0x00, 0x00, 0x00, | |
68 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
69 | 0x00, 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, | |
70 | 0x00, 0x0a, 0x58, 0x54, 0x47, 0x30, 0x0a | |
71 | }; | |
72 | ssize_t ret = write (fd, data, sizeof (data)); | |
73 | if (ret < 0) | |
74 | { | |
75 | printf ("write failed: %m\n"); | |
76 | exit (1); | |
77 | } | |
78 | if ((size_t) ret != sizeof (data)) | |
79 | { | |
80 | printf ("Short write\n"); | |
81 | exit (1); | |
82 | } | |
83 | if (lseek64 (fd, size, SEEK_CUR) < 0) | |
84 | { | |
85 | printf ("lseek failed: %m\n"); | |
86 | close (fd); | |
87 | return NULL; | |
88 | } | |
89 | if (write (fd, "", 1) != 1) | |
90 | { | |
91 | printf ("Single-byte write failed\n"); | |
92 | close (fd); | |
93 | return NULL; | |
94 | } | |
95 | if (close (fd) != 0) | |
96 | { | |
97 | printf ("close failed: %m\n"); | |
98 | exit (1); | |
99 | } | |
100 | return path; | |
101 | } | |
102 | ||
103 | static void | |
104 | test_tz_file (off64_t size) | |
105 | { | |
106 | char *path = create_tz_file (size); | |
afbf2649 SH |
107 | if (path == NULL) |
108 | { | |
109 | printf ("creating timezone file of size: %" PRId64 "MiB failed.\n", | |
110 | size / (1024 * 1024)); | |
111 | exit (1); | |
112 | } | |
113 | ||
42261ad7 FW |
114 | if (setenv ("TZ", path, 1) < 0) |
115 | { | |
116 | printf ("setenv failed: %m\n"); | |
117 | exit (1); | |
118 | } | |
119 | tzset (); | |
120 | free (path); | |
121 | } | |
122 | ||
123 | static int | |
124 | do_test (void) | |
125 | { | |
126 | /* Limit the size of the process. Otherwise, some of the tests will | |
127 | consume a lot of resources. */ | |
128 | { | |
129 | struct rlimit limit; | |
130 | if (getrlimit (RLIMIT_AS, &limit) != 0) | |
131 | { | |
132 | printf ("getrlimit (RLIMIT_AS) failed: %m\n"); | |
133 | return 1; | |
134 | } | |
135 | long target = 512 * 1024 * 1024; | |
136 | if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > target) | |
137 | { | |
138 | limit.rlim_cur = 512 * 1024 * 1024; | |
139 | if (setrlimit (RLIMIT_AS, &limit) != 0) | |
140 | { | |
141 | printf ("setrlimit (RLIMIT_AS) failed: %m\n"); | |
142 | return 1; | |
143 | } | |
144 | } | |
145 | } | |
146 | ||
147 | int errors = 0; | |
148 | for (int i = 1; i <= 4; ++i) | |
149 | { | |
150 | char tz[16]; | |
151 | snprintf (tz, sizeof (tz), "XT%d", i); | |
152 | if (setenv ("TZ", tz, 1) < 0) | |
153 | { | |
154 | printf ("setenv failed: %m\n"); | |
155 | return 1; | |
156 | } | |
157 | tzset (); | |
158 | if (strcmp (tzname[0], tz) == 0) | |
159 | { | |
160 | printf ("Unexpected success for %s\n", tz); | |
161 | ++errors; | |
162 | } | |
163 | } | |
164 | ||
165 | /* Large TZ files. */ | |
166 | ||
167 | /* This will succeed on 64-bit architectures, and fail on 32-bit | |
168 | architectures. It used to crash on 32-bit. */ | |
169 | test_tz_file (64 * 1024 * 1024); | |
170 | ||
171 | /* This will fail on 64-bit and 32-bit architectures. It used to | |
172 | cause a test timeout on 64-bit and crash on 32-bit if the TZ file | |
173 | open succeeded for some reason (it does not use O_LARGEFILE in | |
174 | regular builds). */ | |
175 | test_tz_file (4LL * 1024 * 1024 * 1024 - 6); | |
176 | ||
177 | /* Large TZ variables. */ | |
178 | { | |
179 | size_t length = 64 * 1024 * 1024; | |
180 | char *value = malloc (length + 1); | |
181 | if (value == NULL) | |
182 | { | |
183 | puts ("malloc failed: %m"); | |
184 | return 1; | |
185 | } | |
186 | value[length] = '\0'; | |
187 | ||
188 | memset (value, ' ', length); | |
189 | value[0] = 'U'; | |
190 | value[1] = 'T'; | |
191 | value[2] = 'C'; | |
192 | if (setenv ("TZ", value, 1) < 0) | |
193 | { | |
194 | printf ("setenv failed: %m\n"); | |
195 | return 1; | |
196 | } | |
197 | tzset (); | |
198 | ||
199 | memset (value, '0', length); | |
200 | value[0] = '<'; | |
201 | value[length - 1] = '>'; | |
202 | if (setenv ("TZ", value, 1) < 0) | |
203 | { | |
204 | printf ("setenv failed: %m\n"); | |
205 | return 1; | |
206 | } | |
207 | tzset (); | |
208 | } | |
209 | ||
210 | return errors > 0; | |
211 | } |