1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini tty implementation for busybox 4 * 5 * Copyright (C) 2000 Edward Betts <edward@debian.org>. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 23#include <stdio.h> 24#include <stdlib.h> 25#include <unistd.h> 26#include <sys/types.h> 27#include "busybox.h" 28 29extern int tty_main(int argc, char **argv) 30{ 31 char *tty; 32 33 if (argc > 1) { 34 if (argv[1][0] != '-' || argv[1][1] != 's') 35 show_usage(); 36 } else { 37 tty = ttyname(0); 38 if (tty) 39 puts(tty); 40 else 41 puts("not a tty"); 42 } 43 return(isatty(0) ? EXIT_SUCCESS : EXIT_FAILURE); 44} 45