sbase/date.c

47 lines
774 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 format] [+FORMAT]\n", argv0);
}
int
main(int argc, char *argv[])
{
char buf[BUFSIZ];
char *fmt = "%c";
struct tm *now = NULL;
struct tm *(*tztime)(const time_t *) = localtime;
const char *tz = "local";
time_t t;
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 > 0 && argv[0][0] == '+')
fmt = &argv[0][1];
if (!(now = tztime(&t)))
eprintf("%stime failed\n", tz);
strftime(buf, sizeof(buf), fmt, now);
puts(buf);
return 0;
}