Hi,
> So where does this fit in? Okay, this is basically my computing
> tactic: simplifying my operating system to the point where I can
> actually understand what on Earth is going on.
This.
Also, contributing date.c and date.1. Both probably need refinements.
Thanks,
Kamil
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "util.h"
#define RESULT_SZ 255
int
main(int argc, char *argv[])
{
int i;
struct tm *now_tm = NULL;
time_t now = 0;
char *opt_fmt = "%c";
char *opt_now = NULL;
char result[RESULT_SZ];
if (argc > 1)
for (i = 1; i < argc; i++) {
if (!strncmp("+", argv[i], 1))
opt_fmt = argv[i] + 1;
else if (!strcmp("-d", argv[i]) && ++i < argc)
opt_now = argv[i];
else
eprintf("usage: %s [-d NOW] [+FORMAT]\n", argv[0]);
}
if (opt_now != NULL)
now = atoi(opt_now);
else
now = time(NULL);
now_tm = gmtime(&now);
if (now_tm == NULL)
eprintf("gmtime\n");
strftime(result, RESULT_SZ, opt_fmt, now_tm);
printf("%s\n", result);
return EXIT_SUCCESS;
}
.TH DATE 1 sbase\-VERSION
.SH NAME
date \- format dates
.SH SYNOPSIS
.B date
.RB [ \-d
.I NOW
.RB ]
.RI [ +FORMAT ]
.SH DESCRIPTION
.B date
prints the date and time according to FORMAT (see
.BR strftime(3)
for the description of the format). By default, current system time is
printed, but it could be overriden with \-d.
.SH OPTIONS
.TP
.B \-d NOW
print the date at a different point in time.
.B NOW
is specified in seconds since epoch (00:00 Jan 1 1970).
