sbase/date.c

50 lines
786 B
C

/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [-u] [-d time] [+format]\n", argv0);
}
int
main(int argc, char *argv[])
{
struct tm *now;
struct tm *(*tztime)(const time_t *) = localtime;
time_t t;
char buf[BUFSIZ], *fmt = "%c", *tz = "local";
t = time(NULL);
ARGBEGIN {
case 'd':
t = estrtonum(EARGF(usage()), 0, LLONG_MAX);
break;
case 'u':
tztime = gmtime;
tz = "gm";
break;
default:
usage();
} ARGEND;
if (argc) {
if (argc != 1 || argv[0][0] != '+')
usage();
else
fmt = &argv[0][1];
}
if (!(now = tztime(&t)))
eprintf("%stime failed\n", tz);
strftime(buf, sizeof(buf), fmt, now);
puts(buf);
return 0;
}