1/* See LICENSE file for copyright and license details. */
 2
 3
 4#include <stdio.h>
 5#include <unistd.h>
 6
 7#include "util.h"
 8
 9static void
10usage(void)
11{
12	enprintf(2, "usage: %s\n", argv0);
13}
14
15// ?man tty: print terminal filename
16// ?man display the filename of the terminal connected to stdin
17int
18main(int argc, char *argv[])
19{
20	char *tty;
21
22	ARGBEGIN {
23	default:
24		usage();
25	} ARGEND
26
27	if (argc)
28		usage();
29
30	tty = ttyname(STDIN_FILENO);
31	puts(tty ? tty : "not a tty");
32
33	enfshut(2, stdout, "<stdout>");
34	return !tty;
35}