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Message-Id: <1497621833-9942-3-git-send-email-benjamin.gaignard@linaro.org>
Date: Fri, 16 Jun 2017 16:03:52 +0200
From: Benjamin Gaignard <benjamin.gaignard@...aro.org>
To: john.stultz@...aro.org, tglx@...utronix.de, sboyd@...eaurora.org,
shuah@...nel.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, patrice.chotard@...com,
a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com,
linux-arm-kernel@...ts.infradead.org, rtc-linux@...glegroups.com
Cc: linaro-kernel@...ts.linaro.org,
Benjamin Gaignard <benjamin.gaignard@...aro.org>
Subject: [PATCH 2/3] tools: timer: add test to check y2038/2106 bug
The goal of this test is to check if a RTC device correctly support
dates after years 2038 or 2106.
It set a date (1-1-2200) on RTC and read it back to be sure that the
driver is working well.
The same thing is done on alarm.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
---
tools/testing/selftests/timers/Makefile | 4 +-
tools/testing/selftests/timers/rtctest-2038.c | 135 ++++++++++++++++++++++++++
2 files changed, 138 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/timers/rtctest-2038.c
diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 54481f1..7791f79 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -9,7 +9,8 @@ TEST_GEN_PROGS = posix_timers nanosleep nsleep-lat set-timer-lat mqueue-lat \
TEST_GEN_PROGS_EXTENDED = alarmtimer-suspend valid-adjtimex adjtick change_skew \
skew_consistency clocksource-switch leap-a-day \
- leapcrash set-tai set-2038 set-tz rtctest_setdate
+ leapcrash set-tai set-2038 set-tz rtctest_setdate \
+ rtctest-2038
include ../lib.mk
@@ -29,4 +30,5 @@ run_destructive_tests: run_tests
./set-tz
./set-tai
./set-2038
+ ./rtctest-2038
diff --git a/tools/testing/selftests/timers/rtctest-2038.c b/tools/testing/selftests/timers/rtctest-2038.c
new file mode 100644
index 0000000..213b7ee
--- /dev/null
+++ b/tools/testing/selftests/timers/rtctest-2038.c
@@ -0,0 +1,135 @@
+/* Real Time Clock Driver Test
+ * by: Benjamin Gaignard (benjamin.gaignard@...aro.org)
+ *
+ * To build
+ * gcc rtctest-2038.c -o rtctest-2038
+ *
+ * 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 <linux/rtc.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+static const char default_rtc[] = "/dev/rtc0";
+
+int main(int argc, char **argv)
+{
+ int fd, retval;
+ struct rtc_time new, current;
+ const char *rtc = default_rtc;
+
+ switch (argc) {
+ case 2:
+ rtc = argv[1];
+ /* FALLTHROUGH */
+ case 1:
+ break;
+ default:
+ fprintf(stderr, "usage: rtctest-2038 [rtcdev]\n");
+ return 1;
+ }
+
+ fprintf(stderr, "\nTest if RTC is robust for date after y2038/2106\n\n");
+
+ fd = open(rtc, O_RDONLY);
+ if (fd == -1) {
+ perror(rtc);
+ exit(errno);
+ }
+
+ new.tm_year = 300; /* 2200 - 1900 */
+ new.tm_mon = 0;
+ new.tm_mday = 1;
+ new.tm_hour = 0;
+ new.tm_min = 0;
+ new.tm_sec = 0;
+
+ fprintf(stderr, "Test will set RTC date/time to %d-%d-%d, %02d:%02d:%02d.\n",
+ new.tm_mday, new.tm_mon + 1, new.tm_year + 1900,
+ new.tm_hour, new.tm_min, new.tm_sec);
+
+ /* Write the new date in RTC */
+ retval = ioctl(fd, RTC_SET_TIME, &new);
+ if (retval == -1) {
+ perror("RTC_SET_TIME ioctl");
+ close(fd);
+ exit(errno);
+ }
+
+ /* Read back */
+ retval = ioctl(fd, RTC_RD_TIME, ¤t);
+ if (retval == -1) {
+ perror("RTC_RD_TIME ioctl");
+ exit(errno);
+ }
+
+ fprintf(stderr, "RTC date/time is %d-%d-%d, %02d:%02d:%02d.\n",
+ current.tm_mday, current.tm_mon + 1, current.tm_year + 1900,
+ current.tm_hour, current.tm_min, current.tm_sec);
+
+ if (new.tm_year != current.tm_year ||
+ new.tm_mon != current.tm_mon ||
+ new.tm_mday != current.tm_mday ||
+ new.tm_hour != current.tm_hour ||
+ new.tm_min != current.tm_min ||
+ new.tm_sec != current.tm_sec) {
+ fprintf(stderr, "\n\nSet Time test failed\n");
+ close(fd);
+ return 1;
+ }
+
+ new.tm_sec += 5;
+
+ fprintf(stderr, "\nTest will set RTC alarm to %d-%d-%d, %02d:%02d:%02d.\n",
+ new.tm_mday, new.tm_mon + 1, new.tm_year + 1900,
+ new.tm_hour, new.tm_min, new.tm_sec);
+
+ /* Write the new alarm in RTC */
+ retval = ioctl(fd, RTC_ALM_SET, &new);
+ if (retval == -1) {
+ perror("RTC_ALM_SET ioctl");
+ close(fd);
+ exit(errno);
+ }
+
+ /* Read back */
+ retval = ioctl(fd, RTC_ALM_READ, ¤t);
+ if (retval == -1) {
+ perror("RTC_ALM_READ ioctl");
+ exit(errno);
+ }
+
+ fprintf(stderr, "RTC alarm is %d-%d-%d, %02d:%02d:%02d.\n",
+ current.tm_mday, current.tm_mon + 1, current.tm_year + 1900,
+ current.tm_hour, current.tm_min, current.tm_sec);
+
+ if (new.tm_year != current.tm_year ||
+ new.tm_mon != current.tm_mon ||
+ new.tm_mday != current.tm_mday ||
+ new.tm_hour != current.tm_hour ||
+ new.tm_min != current.tm_min ||
+ new.tm_sec != current.tm_sec) {
+ fprintf(stderr, "\n\nSet alarm test failed\n");
+ close(fd);
+ return 1;
+ }
+
+ fprintf(stderr, "\nTest complete\n");
+ close(fd);
+ return 0;
+}
--
1.9.1
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