An old standalone C code for executing gettimeofday() and settimeofday() system calls for *BSD

resettimeofday.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>

int main(int argc, char **argv)
{
        struct timeval t;
        struct timezone tz;

        if (-1 == gettimeofday(&t, &tz)) {
                perror("resettimeofday: gettimeofday");
                exit(-1);
        }

        if (-1 == settimeofday(&t, &tz)) {
                perror("resettimeofday: settimeofday");
                exit(-1);
        }
        exit(0);
}