Listing 1: whattime.c

/*   WHATTIME.C
*
*   Convert seconds to an epoch date.
*
*   Copyright 1994, Lawrence S Reznick
*/

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

int main(int argc, char **argv)
{
time_t    t;

if (argc < 2) {
fputs("Usage:\t", stderr);
fputs(argv[0], stderr);
fputs(" seconds [seconds ...]\n\n", stderr);
fputs("Convert seconds to a calendar time.\n", stderr);
exit(1);
}

while (++argv, --argc) {
t = strtol(*argv, NULL, 0);
fputs(ctime(&t), stdout);
}

return(0);
}