#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <err.h>

void printTmStruct(const struct tm *tm);

int
main(int argc, char *argv[])
{
    time_t t;
    struct tm *gmtm, *lcltm;

    t = time(NULL);
    printf("time(NULL)=%ld\n", (long) t);

    if ((gmtm = gmtime(&t)) == NULL)
        errx(EXIT_FAILURE, "gmtime");

    printTmStruct(gmtm);

    if ((lcltm = localtime(&t)) == NULL)
        errx(EXIT_FAILURE, "localtime");

    printf("\n");
    printTmStruct(lcltm);

    exit(EXIT_SUCCESS);
}

void
printTmStruct(const struct tm *tm)
{
    printf("tm_sec=%d\n", tm->tm_sec);
    printf("tm_min=%d\n", tm->tm_min);
    printf("tm_hour=%d\n", tm->tm_hour);

    printf("tm_mday=%d\n", tm->tm_mday);
    printf("tm_mon=%d\n", tm->tm_mon);
    printf("tm_year=%d\n", tm->tm_year);

    printf("tm_wday=%d\n", tm->tm_wday);
    printf("tm_yday=%d\n", tm->tm_yday);

    printf("tm_isdst=%d\n", tm->tm_isdst);

    printf("tm_gmtoff=%ld\n", tm->tm_gmtoff);
    printf("tm_zone=%s\n", tm->tm_zone);
}