mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
c96396f078
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>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* 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, ¤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;
|
|
}
|