along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <assert.h>
-#include <string.h>
-#include <unistd.h>
#include <errno.h>
-#include <stdlib.h>
-#include <signal.h>
#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <sys/prctl.h>
#include <sys/time.h>
#include <linux/rtc.h>
#include "macro.h"
#include "util.h"
-#include "log.h"
-#include "strv.h"
#include "clock-util.h"
-#include "fileio.h"
int clock_get_hwclock(struct tm *tm) {
_cleanup_close_ int fd = -1;
minutesdelta = tm->tm_gmtoff / 60;
tz.tz_minuteswest = -minutesdelta;
- tz.tz_dsttime = 0; /* DST_NONE*/
+ tz.tz_dsttime = 0; /* DST_NONE */
/*
- * If the hardware clock does not run in UTC, but in local time:
- * The very first time we set the kernel's timezone, it will warp
- * the clock so that it runs in UTC instead of local time.
+ * If the RTC does not run in UTC but in local time, the very first
+ * call to settimeofday() will set the kernel's timezone and will warp the
+ * system clock, so that it runs in UTC instead of the local time we
+ * have read from the RTC.
*/
if (settimeofday(tv_null, &tz) < 0)
return -errno;
return 0;
}
-int clock_reset_timezone(void) {
+int clock_reset_timewarp(void) {
const struct timeval *tv_null = NULL;
struct timezone tz;
tz.tz_minuteswest = 0;
- tz.tz_dsttime = 0; /* DST_NONE*/
+ tz.tz_dsttime = 0; /* DST_NONE */
/*
- * The very first time we set the kernel's timezone, it will warp
- * the clock. Do a dummy call here, so the time warping is sealed
- * and we set only the timezone with the next call.
+ * The very first call to settimeofday() does time warp magic. Do a
+ * dummy call here, so the time warping is sealed and all later calls
+ * behave as expected.
*/
if (settimeofday(tv_null, &tz) < 0)
return -errno;