tools: timer: add rtctest_setdate

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>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 5fa1d7e9a9158ab6e3edee87ac8388236159e5e0..54481f17518a9a9900f94ebdceb297540f0796e1 100644 (file)
--- 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 (file)
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;
+}