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Subject[PATCH v2 1/3] tools: timer: add rtctest_setdate
Date
This tool allow to set directly the time and date to a RTC device.

Unlike other tools isn't doens't use "struct timeval" or "time_t"
so it is safe for 32bits platforms when testing for y2038/2106 bug.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
---
tools/testing/selftests/timers/Makefile | 2 +-
tools/testing/selftests/timers/rtctest_setdate.c | 86 ++++++++++++++++++++++++
2 files changed, 87 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/timers/rtctest_setdate.c

diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 5fa1d7e9..54481f1 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -9,7 +9,7 @@ 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
+ leapcrash set-tai set-2038 set-tz rtctest_setdate


include ../lib.mk
diff --git a/tools/testing/selftests/timers/rtctest_setdate.c b/tools/testing/selftests/timers/rtctest_setdate.c
new file mode 100644
index 0000000..2cb7848
--- /dev/null
+++ b/tools/testing/selftests/timers/rtctest_setdate.c
@@ -0,0 +1,86 @@
+/* Real Time Clock Driver Test
+ * by: Benjamin Gaignard (benjamin.gaignard@linaro.org)
+ *
+ * To build
+ * gcc rtctest_setdate.c -o rtctest_setdate
+ *
+ * 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_time[] = "00:00:00";
+
+int main(int argc, char **argv)
+{
+ int fd, retval;
+ struct rtc_time new, current;
+ const char *rtc, *date;
+ const char *time = default_time;
+
+ switch (argc) {
+ case 4:
+ time = argv[3];
+ /* FALLTHROUGH */
+ case 3:
+ date = argv[2];
+ rtc = argv[1];
+ break;
+ default:
+ fprintf(stderr, "usage: rtctest_setdate <rtcdev> <DD-MM-YYYY> [HH:MM:SS]\n");
+ return 1;
+ }
+
+ fd = open(rtc, O_RDONLY);
+ if (fd == -1) {
+ perror(rtc);
+ exit(errno);
+ }
+
+ sscanf(date, "%d-%d-%d", &new.tm_mday, &new.tm_mon, &new.tm_year);
+ new.tm_mon -= 1;
+ new.tm_year -= 1900;
+ sscanf(time, "%d:%d:%d", &new.tm_hour, &new.tm_min, &new.tm_sec);
+
+ 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, &current);
+ if (retval == -1) {
+ perror("RTC_RD_TIME ioctl");
+ exit(errno);
+ }
+
+ fprintf(stderr, "\n\nCurrent 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);
+
+ close(fd);
+ return 0;
+}
--
1.9.1
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