// SPDX-License-Identifier: GPL-2.0-or-later/* Real Time Clock Driver Test * by: Benjamin Gaignard (benjamin.gaignard@linaro.org) * * To build * gcc rtctest_setdate.c -o rtctest_setdate */ #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;}
// SPDX-License-Identifier: GPL-2.0-or-later
/* Real Time Clock Driver Test
* by: Benjamin Gaignard (benjamin.gaignard@linaro.org)
*
* To build
* gcc rtctest_setdate.c -o rtctest_setdate
*/
#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;
}