/*
 * File to document bug with localtime() setting errno despite succeeding
 * in Cygwin 1.3.2.
 * Compile on Windows NT 4 with shell command:
 *      gcc -Wall -ansi time_bug_report.c -o time_bug_report.exe
 */

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

int main (int argc, char *argv[])
{
    time_t          now;
    struct tm      *tmp = (struct tm *)NULL;
    char           *timestring = (char *)NULL;

    printf("Before I call anything, errno = 0x%x\n", errno);
    printf("(I'll reset errno to 0 before each time library call.)\n");
    errno = 0;
    now = time(NULL);
    printf("time() returned 0x%x and set errno to 0x%x\n",
           (unsigned)now, errno);

    errno = 0;
    timestring = ctime(&now);
    printf("timestring() returned 0x%x and set errno to 0x%x\n",
           (unsigned)timestring, errno);
    if (timestring != (char *)NULL)
    {
        printf("Hello, it's %s", timestring);
    }

    errno = 0;
    tmp = localtime(&now);
    printf("localtime() returned 0x%x and set errno to 0x%x\n",
           (unsigned)tmp, errno);

    exit(errno);
}