aboutsummaryrefslogtreecommitdiff
path: root/timezone/tst-tzset.c
diff options
context:
space:
mode:
Diffstat (limited to 'timezone/tst-tzset.c')
-rw-r--r--timezone/tst-tzset.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/timezone/tst-tzset.c b/timezone/tst-tzset.c
new file mode 100644
index 0000000..aefcc76
--- /dev/null
+++ b/timezone/tst-tzset.c
@@ -0,0 +1,200 @@
+/* tzset tests with crafted time zone data.
+ Copyright (C) 2015 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define _GNU_SOURCE 1
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <time.h>
+#include <unistd.h>
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+/* Returns the name of a large TZ file. */
+static char *
+create_tz_file (off64_t size)
+{
+ char *path;
+ int fd = create_temp_file ("tst-tzset-", &path);
+ if (fd < 0)
+ exit (1);
+
+ // Reopen for large-file support.
+ close (fd);
+ fd = open64 (path, O_WRONLY);
+ if (fd < 0)
+ {
+ printf ("open64 (%s) failed: %m\n", path);
+ exit (1);
+ }
+
+ static const char data[] = {
+ 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00, 0x00,
+ 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x04, 0xf8, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x58, 0x54, 0x47, 0x00, 0x00,
+ 0x00, 0x0a, 0x58, 0x54, 0x47, 0x30, 0x0a
+ };
+ ssize_t ret = write (fd, data, sizeof (data));
+ if (ret < 0)
+ {
+ printf ("write failed: %m\n");
+ exit (1);
+ }
+ if ((size_t) ret != sizeof (data))
+ {
+ printf ("Short write\n");
+ exit (1);
+ }
+ if (lseek64 (fd, size, SEEK_CUR) < 0)
+ {
+ printf ("lseek failed: %m\n");
+ close (fd);
+ return NULL;
+ }
+ if (write (fd, "", 1) != 1)
+ {
+ printf ("Single-byte write failed\n");
+ close (fd);
+ return NULL;
+ }
+ if (close (fd) != 0)
+ {
+ printf ("close failed: %m\n");
+ exit (1);
+ }
+ return path;
+}
+
+static void
+test_tz_file (off64_t size)
+{
+ char *path = create_tz_file (size);
+ if (setenv ("TZ", path, 1) < 0)
+ {
+ printf ("setenv failed: %m\n");
+ exit (1);
+ }
+ tzset ();
+ free (path);
+}
+
+static int
+do_test (void)
+{
+ /* Limit the size of the process. Otherwise, some of the tests will
+ consume a lot of resources. */
+ {
+ struct rlimit limit;
+ if (getrlimit (RLIMIT_AS, &limit) != 0)
+ {
+ printf ("getrlimit (RLIMIT_AS) failed: %m\n");
+ return 1;
+ }
+ long target = 512 * 1024 * 1024;
+ if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > target)
+ {
+ limit.rlim_cur = 512 * 1024 * 1024;
+ if (setrlimit (RLIMIT_AS, &limit) != 0)
+ {
+ printf ("setrlimit (RLIMIT_AS) failed: %m\n");
+ return 1;
+ }
+ }
+ }
+
+ int errors = 0;
+ for (int i = 1; i <= 4; ++i)
+ {
+ char tz[16];
+ snprintf (tz, sizeof (tz), "XT%d", i);
+ if (setenv ("TZ", tz, 1) < 0)
+ {
+ printf ("setenv failed: %m\n");
+ return 1;
+ }
+ tzset ();
+ if (strcmp (tzname[0], tz) == 0)
+ {
+ printf ("Unexpected success for %s\n", tz);
+ ++errors;
+ }
+ }
+
+ /* Large TZ files. */
+
+ /* This will succeed on 64-bit architectures, and fail on 32-bit
+ architectures. It used to crash on 32-bit. */
+ test_tz_file (64 * 1024 * 1024);
+
+ /* This will fail on 64-bit and 32-bit architectures. It used to
+ cause a test timeout on 64-bit and crash on 32-bit if the TZ file
+ open succeeded for some reason (it does not use O_LARGEFILE in
+ regular builds). */
+ test_tz_file (4LL * 1024 * 1024 * 1024 - 6);
+
+ /* Large TZ variables. */
+ {
+ size_t length = 64 * 1024 * 1024;
+ char *value = malloc (length + 1);
+ if (value == NULL)
+ {
+ puts ("malloc failed: %m");
+ return 1;
+ }
+ value[length] = '\0';
+
+ memset (value, ' ', length);
+ value[0] = 'U';
+ value[1] = 'T';
+ value[2] = 'C';
+ if (setenv ("TZ", value, 1) < 0)
+ {
+ printf ("setenv failed: %m\n");
+ return 1;
+ }
+ tzset ();
+
+ memset (value, '0', length);
+ value[0] = '<';
+ value[length - 1] = '>';
+ if (setenv ("TZ", value, 1) < 0)
+ {
+ printf ("setenv failed: %m\n");
+ return 1;
+ }
+ tzset ();
+ }
+
+ return errors > 0;
+}