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#define _GNU_SOURCE
#include <sys/time.h>
#include <sys/timex.h>
#include <errno.h>
#include "syscall.h"
int adjtime(const struct timeval *in, struct timeval *out)
{
struct timex tx = { 0 };
if (in) {
if (in->tv_sec > 1000 || in->tv_usec > 1000000000) {
errno = EINVAL;
return -1;
}
tx.offset = in->tv_sec*1000000 + in->tv_usec;
tx.modes = ADJ_OFFSET_SINGLESHOT;
}
if (adjtimex(&tx) < 0) return -1;
if (out) {
out->tv_sec = tx.offset / 1000000;
if ((out->tv_usec = tx.offset % 1000000) < 0) {
out->tv_sec--;
out->tv_usec += 1000000;
}
}
return 0;
}
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