comcontrol.c revision 59838 
1/*-
2 * Copyright (c) 1992 Christopher G. Demetriou
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote
14 *    products derived from this software without specific written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef lint
30static const char rcsid[] =
31  "$FreeBSD: head/sbin/comcontrol/comcontrol.c 59838 2000-05-01 12:14:30Z ache $";
32#endif /* not lint */
33
34#include <ctype.h>
35#include <err.h>
36#include <errno.h>
37#include <fcntl.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <unistd.h>
41#include <sys/types.h>
42#include <sys/ioctl.h>
43
44static void
45usage()
46{
47	fprintf(stderr,
48	"usage: comcontrol <filename>|- [dtrwait <n>] [drainwait <n>]\n");
49	exit(1);
50}
51
52int
53main(int argc, char *argv[])
54{
55	int	fd;
56	int     res = 0;
57	int     print_dtrwait = 1, print_drainwait = 1;
58	int     dtrwait = -1, drainwait = -1;
59
60	if (argc < 2)
61		usage();
62
63	if (strcmp(argv[1], "-") == 0)
64		fd = STDIN_FILENO;
65	else {
66		fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
67		if (fd < 0) {
68			warn("couldn't open file %s", argv[1]);
69			return 1;
70		}
71	}
72	if (argc == 2) {
73		if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
74			print_dtrwait = 0;
75			if (errno != ENOTTY) {
76				res = 1;
77				warn("TIOCMGDTRWAIT");
78			}
79		}
80		if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
81			print_drainwait = 0;
82			if (errno != ENOTTY) {
83				res = 1;
84				warn("TIOCGDRAINWAIT");
85			}
86		}
87		if (print_dtrwait)
88			printf("dtrwait %d ", dtrwait);
89		if (print_drainwait)
90			printf("drainwait %d ", drainwait);
91		printf("\n");
92	} else {
93		while (argv[2] != NULL) {
94			if (!strcmp(argv[2],"dtrwait")) {
95				if (dtrwait >= 0)
96					usage();
97				if (argv[3] == NULL || !isdigit(argv[3][0]))
98					usage();
99				dtrwait = atoi(argv[3]);
100				argv += 2;
101			} else if (!strcmp(argv[2],"drainwait")) {
102				if (drainwait >= 0)
103					usage();
104				if (argv[3] == NULL || !isdigit(argv[3][0]))
105					usage();
106				drainwait = atoi(argv[3]);
107				argv += 2;
108			} else
109				usage();
110		}
111		if (dtrwait >= 0) {
112			if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
113				res = 1;
114				warn("TIOCMSDTRWAIT");
115			}
116		}
117		if (drainwait >= 0) {
118			if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
119				res = 1;
120				warn("TIOCSDRAINWAIT");
121			}
122		}
123	}
124
125	close(fd);
126	return res;
127}
128