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#include <limits.h>
#include <sys/time.h>
#include <sys/timex.h>
#include <errno.h>
#define MAX_SEC (LONG_MAX / 1000000L - 2)
#define MIN_SEC (LONG_MIN / 1000000L + 2)
#ifndef MOD_OFFSET
#define modes mode
#endif
int
adjtime(const struct timeval * itv, struct timeval * otv)
{
struct timex tntx;
if (itv)
{
struct timeval tmp;
/* We will do some check here. */
tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
tmp.tv_usec = itv->tv_usec % 1000000L;
if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
{
__set_errno(EINVAL);
return -1;
}
tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
tntx.modes = ADJ_OFFSET_SINGLESHOT;
}
else
{
tntx.modes = 0;
}
if (adjtimex(&tntx) < 0) return -1;
if (otv) {
if (tntx.offset < 0)
{
otv->tv_usec = -(-tntx.offset % 1000000);
otv->tv_sec = -(-tntx.offset / 1000000);
}
else
{
otv->tv_usec = tntx.offset % 1000000;
otv->tv_sec = tntx.offset / 1000000;
}
}
return 0;
}
weak_alias(adjtime, __adjtime);
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