2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/bin/notty/notty.c,v 1.1 2008/05/27 17:10:49 dillon Exp $
37 * NOTTY.C - program to disconnect a program from the tty and close
38 * stdin, stdout, and stderr (-012 to specify which descriptors
41 * NOTTY [-012] <command>
44 #include <sys/types.h>
45 #include <sys/ioctl.h>
56 static void usage(void);
59 main(int ac, char **av)
61 const char *opts = "";
69 if (av[1][0] == '-') {
76 ttyfd = open("/dev/null", O_RDWR);
78 if (strchr(opts, '0') == NULL && ttyfd != 0)
80 if (strchr(opts, '1') == NULL && ttyfd != 1)
82 if (strchr(opts, '2') == NULL && ttyfd != 2)
88 fd = open("/dev/tty", O_RDWR);
90 ioctl(fd, TIOCNOTTY, 0);
96 exit(execvp(av[1], av + 1));
104 fprintf(stderr, "notty [-012] command args...\n");