Hi,
On 16/06/2017 at 16:03:51 +0200, Benjamin Gaignard wrote:
> This tool allow to set directly the time and date to a RTC device.
>
> Unlike other tools isn't doens't use "strut timeval" or "time_t"
A small typo here-----^
> so it is safe for 32bits platforms when testing for y2038/2106 bug.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
> ---
> 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@xxxxxxxxxx)
> + *
> + * 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, ¤t);
> + 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
>
--
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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