31 lines
373 B
C
31 lines
373 B
C
/* See LICENSE file for copyright and license details. */
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *tty;
|
|
|
|
ARGBEGIN {
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if (argc)
|
|
usage();
|
|
|
|
tty = ttyname(STDIN_FILENO);
|
|
puts(tty ? tty : "not a tty");
|
|
|
|
return !tty;
|
|
}
|