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 <[email protected]> > --- > 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 ([email protected]) > + * > + * 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
