1 /* tzset tests with crafted time zone data.
2 Copyright (C) 2015-2021 Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
24 #include <sys/resource.h>
27 #include <support/check.h>
29 static int do_test (void);
30 #define TEST_FUNCTION do_test ()
31 #include "../test-skeleton.c"
33 /* Returns the name of a large TZ file. */
35 create_tz_file (off64_t size
)
38 int fd
= create_temp_file ("tst-tzset-", &path
);
41 if (!support_descriptor_supports_holes (fd
))
42 FAIL_UNSUPPORTED ("File %s does not support holes", path
);
44 // Reopen for large-file support.
46 fd
= open64 (path
, O_WRONLY
);
49 printf ("open64 (%s) failed: %m\n", path
);
53 static const char data
[] = {
54 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
57 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
59 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
60 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, 0x00,
61 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
62 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
64 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
65 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
66 0x00, 0x00, 0x00, 0x04, 0xf8, 0x00, 0x00, 0x00,
67 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
68 0x00, 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00,
69 0x00, 0x0a, 0x58, 0x54, 0x47, 0x30, 0x0a
71 ssize_t ret
= write (fd
, data
, sizeof (data
));
74 printf ("write failed: %m\n");
77 if ((size_t) ret
!= sizeof (data
))
79 printf ("Short write\n");
82 if (lseek64 (fd
, size
, SEEK_CUR
) < 0)
84 printf ("lseek failed: %m\n");
88 if (write (fd
, "", 1) != 1)
90 printf ("Single-byte write failed\n");
96 printf ("close failed: %m\n");
103 test_tz_file (off64_t size
)
105 char *path
= create_tz_file (size
);
106 if (setenv ("TZ", path
, 1) < 0)
108 printf ("setenv failed: %m\n");
118 /* Limit the size of the process. Otherwise, some of the tests will
119 consume a lot of resources. */
122 if (getrlimit (RLIMIT_AS
, &limit
) != 0)
124 printf ("getrlimit (RLIMIT_AS) failed: %m\n");
127 long target
= 512 * 1024 * 1024;
128 if (limit
.rlim_cur
== RLIM_INFINITY
|| limit
.rlim_cur
> target
)
130 limit
.rlim_cur
= 512 * 1024 * 1024;
131 if (setrlimit (RLIMIT_AS
, &limit
) != 0)
133 printf ("setrlimit (RLIMIT_AS) failed: %m\n");
140 for (int i
= 1; i
<= 4; ++i
)
143 snprintf (tz
, sizeof (tz
), "XT%d", i
);
144 if (setenv ("TZ", tz
, 1) < 0)
146 printf ("setenv failed: %m\n");
150 if (strcmp (tzname
[0], tz
) == 0)
152 printf ("Unexpected success for %s\n", tz
);
157 /* Large TZ files. */
159 /* This will succeed on 64-bit architectures, and fail on 32-bit
160 architectures. It used to crash on 32-bit. */
161 test_tz_file (64 * 1024 * 1024);
163 /* This will fail on 64-bit and 32-bit architectures. It used to
164 cause a test timeout on 64-bit and crash on 32-bit if the TZ file
165 open succeeded for some reason (it does not use O_LARGEFILE in
167 test_tz_file (4LL * 1024 * 1024 * 1024 - 6);
169 /* Large TZ variables. */
171 size_t length
= 64 * 1024 * 1024;
172 char *value
= malloc (length
+ 1);
175 puts ("malloc failed: %m");
178 value
[length
] = '\0';
180 memset (value
, ' ', length
);
184 if (setenv ("TZ", value
, 1) < 0)
186 printf ("setenv failed: %m\n");
191 memset (value
, '0', length
);
193 value
[length
- 1] = '>';
194 if (setenv ("TZ", value
, 1) < 0)
196 printf ("setenv failed: %m\n");