Test program for some Unix time syscalls

gettime64.c

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <unistd.h>

int main(int argc, char **argv) {
    struct timespec ts;
    struct timeval tv;
    for (;;) {
        int res;
        ts.tv_sec = (time_t)-1;
        ts.tv_nsec = (long)-1;
        res = clock_gettime(CLOCK_REALTIME, &ts);
        if (res) {
            fprintf(stderr, "clock_gettime failed: %s\n", strerror(errno));
            exit(1);
        }
        printf("%08lx.%08lx ", (long)ts.tv_sec, (long)ts.tv_nsec);
        tv.tv_sec = (time_t)-1;
        tv.tv_usec = (long)-1;
        res = gettimeofday(&tv, 0);
        if (res) {
            fprintf(stderr, "gettimeofday failed: %s\n", strerror(errno));
            exit(1);
        }
        printf("%08lx.%05lx\n", (long)tv.tv_sec, (long)tv.tv_usec);
        sleep(1);
    }
    return 0;
}