common/bsd/gettimeofday.c

#ifndef LINT
static const char rcsid[] = "$Id: gettimeofday.c,v 1.4 2005/04/27 04:56:11 sra Exp $";
#endif

#include "port_before.h"
#include <stdio.h>
#include <syslog.h>
#include <sys/time.h>
#include "port_after.h"

#if !defined(NEED_GETTIMEOFDAY)
/*%
 * gettimeofday() occasionally returns invalid tv_usec on some platforms.
 */
#define MILLION 1000000
#undef gettimeofday

int
isc__gettimeofday(struct timeval *tp, struct timezone *tzp) {
    int res;

    res = gettimeofday(tp, tzp);
    if (res < 0)
        return (res);
    if (tp == NULL)
        return (res);
    if (tp->tv_usec < 0) {
        do {
            tp->tv_usec += MILLION;
            tp->tv_sec--;
        } while (tp->tv_usec < 0);
        goto log;
    } else if (tp->tv_usec > MILLION) {
        do {
            tp->tv_usec -= MILLION;
            tp->tv_sec++;
        } while (tp->tv_usec > MILLION);
        goto log;
    }
    return (res);
 log:
    syslog(LOG_ERR, "gettimeofday: tv_usec out of range\n");
    return (res);
}
#else
int
gettimeofday(struct timeval *tvp, struct _TIMEZONE *tzp) {
    time_t clock, time(time_t *);

    if (time(&clock) == (time_t) -1)
        return (-1);
    if (tvp) {
        tvp->tv_sec = clock;
        tvp->tv_usec = 0;
    }
    if (tzp) {
        tzp->tz_minuteswest = 0;
        tzp->tz_dsttime = 0;
    }
    return (0);
}
#endif /*NEED_GETTIMEOFDAY*/