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authorJohn Stultz <john.stultz@linaro.org>2016-06-01 11:53:27 -0700
committerShuah Khan <shuahkh@osg.samsung.com>2016-06-02 16:39:56 -0600
commit1a77e2bd8c89a37703dc9de18a7b552ad76e1c12 (patch)
treef83938868f1a3e7b037ba90acc5063532be7737d /tools/testing
parentLinux 4.7-rc1 (diff)
downloadlinux-dev-1a77e2bd8c89a37703dc9de18a7b552ad76e1c12.tar.xz
linux-dev-1a77e2bd8c89a37703dc9de18a7b552ad76e1c12.zip
kselftests: timers: Add set-tz test case
Mika Westerberg reported a erroneous change in the error checking of settimeofday, so I wanted to add a test to ensure we don't trip over this again. Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Baolin Wang <baolin.wang@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools/testing')
-rw-r--r--tools/testing/selftests/timers/Makefile3
-rw-r--r--tools/testing/selftests/timers/set-tz.c119
2 files changed, 121 insertions, 1 deletions
diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 4a1be1b75a7f..1d5556869137 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -10,7 +10,7 @@ TEST_PROGS = posix_timers nanosleep nsleep-lat set-timer-lat mqueue-lat \
TEST_PROGS_EXTENDED = alarmtimer-suspend valid-adjtimex adjtick change_skew \
skew_consistency clocksource-switch leap-a-day \
- leapcrash set-tai set-2038
+ leapcrash set-tai set-2038 set-tz
bins = $(TEST_PROGS) $(TEST_PROGS_EXTENDED)
@@ -30,6 +30,7 @@ run_destructive_tests: run_tests
./clocksource-switch
./leap-a-day -s -i 10
./leapcrash
+ ./set-tz
./set-tai
./set-2038
diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
new file mode 100644
index 000000000000..f4184928b16b
--- /dev/null
+++ b/tools/testing/selftests/timers/set-tz.c
@@ -0,0 +1,119 @@
+/* Set tz value
+ * by: John Stultz <john.stultz@linaro.org>
+ * (C) Copyright Linaro 2016
+ * Licensed under the GPLv2
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#ifdef KTEST
+#include "../kselftest.h"
+#else
+static inline int ksft_exit_pass(void)
+{
+ exit(0);
+}
+static inline int ksft_exit_fail(void)
+{
+ exit(1);
+}
+#endif
+
+int set_tz(int min, int dst)
+{
+ struct timezone tz;
+
+ tz.tz_minuteswest = min;
+ tz.tz_dsttime = dst;
+
+ return settimeofday(0, &tz);
+}
+
+int get_tz_min(void)
+{
+ struct timezone tz;
+ struct timeval tv;
+
+ memset(&tz, 0, sizeof(tz));
+ gettimeofday(&tv, &tz);
+ return tz.tz_minuteswest;
+}
+
+int get_tz_dst(void)
+{
+ struct timezone tz;
+ struct timeval tv;
+
+ memset(&tz, 0, sizeof(tz));
+ gettimeofday(&tv, &tz);
+ return tz.tz_dsttime;
+}
+
+int main(int argc, char **argv)
+{
+ int i, ret;
+ int min, dst;
+
+ min = get_tz_min();
+ dst = get_tz_dst();
+ printf("tz_minuteswest started at %i, dst at %i\n", min, dst);
+
+ printf("Checking tz_minuteswest can be properly set: ");
+ for (i = -15*60; i < 15*60; i += 30) {
+ ret = set_tz(i, dst);
+ ret = get_tz_min();
+ if (ret != i) {
+ printf("[FAILED] expected: %i got %i\n", i, ret);
+ goto err;
+ }
+ }
+ printf("[OK]\n");
+
+ printf("Checking invalid tz_minuteswest values are caught: ");
+
+ if (!set_tz(-15*60-1, dst)) {
+ printf("[FAILED] %i didn't return failure!\n", -15*60-1);
+ goto err;
+ }
+
+ if (!set_tz(15*60+1, dst)) {
+ printf("[FAILED] %i didn't return failure!\n", 15*60+1);
+ goto err;
+ }
+
+ if (!set_tz(-24*60, dst)) {
+ printf("[FAILED] %i didn't return failure!\n", -24*60);
+ goto err;
+ }
+
+ if (!set_tz(24*60, dst)) {
+ printf("[FAILED] %i didn't return failure!\n", 24*60);
+ goto err;
+ }
+
+ printf("[OK]\n");
+
+ set_tz(min, dst);
+ return ksft_exit_pass();
+
+err:
+ set_tz(min, dst);
+ return ksft_exit_fail();
+}