2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1992 Christopher G. Demetriou
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote
16 * products derived from this software without specific written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
42 #include <sys/types.h>
43 #include <sys/ioctl.h>
45 static void usage(void);
51 "usage: comcontrol <filename> [dtrwait <n>] [drainwait <n>]\n");
56 main(int argc, char *argv[])
60 int print_dtrwait = 1, print_drainwait = 1;
61 int dtrwait = -1, drainwait = -1;
66 if (strcmp(argv[1], "-") == 0)
69 fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
71 warn("couldn't open file %s", argv[1]);
76 if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
78 if (errno != ENOTTY) {
80 warn("TIOCMGDTRWAIT");
83 if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
85 if (errno != ENOTTY) {
87 warn("TIOCGDRAINWAIT");
91 printf("dtrwait %d ", dtrwait);
93 printf("drainwait %d ", drainwait);
96 while (argv[2] != NULL) {
97 if (!strcmp(argv[2],"dtrwait")) {
100 if (argv[3] == NULL || !isdigit(argv[3][0]))
102 dtrwait = atoi(argv[3]);
104 } else if (!strcmp(argv[2],"drainwait")) {
107 if (argv[3] == NULL || !isdigit(argv[3][0]))
109 drainwait = atoi(argv[3]);
115 if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
117 warn("TIOCMSDTRWAIT");
120 if (drainwait >= 0) {
121 if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
123 warn("TIOCSDRAINWAIT");