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 78732 2001-06-24 23:04:23Z dd $";
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 <string.h>
41#include <unistd.h>
42#include <sys/types.h>
43#include <sys/ioctl.h>
44
45static void
46usage()
47{
48 fprintf(stderr,
49 "usage: comcontrol <filename> [dtrwait <n>] [drainwait <n>]\n");
50 exit(1);
51}
52
53int
54main(int argc, char *argv[])
55{
56 int fd;
57 int res = 0;
58 int print_dtrwait = 1, print_drainwait = 1;
59 int dtrwait = -1, drainwait = -1;
60
61 if (argc < 2)
62 usage();
63
64 if (strcmp(argv[1], "-") == 0)
65 fd = STDIN_FILENO;
66 else {
67 fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
68 if (fd < 0) {
69 warn("couldn't open file %s", argv[1]);
70 return 1;
71 }
72 }
73 if (argc == 2) {
74 if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
75 print_dtrwait = 0;
76 if (errno != ENOTTY) {
77 res = 1;
78 warn("TIOCMGDTRWAIT");
79 }
80 }
81 if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
82 print_drainwait = 0;
83 if (errno != ENOTTY) {
84 res = 1;
85 warn("TIOCGDRAINWAIT");
86 }
87 }
88 if (print_dtrwait)
89 printf("dtrwait %d ", dtrwait);
90 if (print_drainwait)
91 printf("drainwait %d ", drainwait);
92 printf("\n");
93 } else {
94 while (argv[2] != NULL) {
95 if (!strcmp(argv[2],"dtrwait")) {
96 if (dtrwait >= 0)
97 usage();
98 if (argv[3] == NULL || !isdigit(argv[3][0]))
99 usage();
100 dtrwait = atoi(argv[3]);
101 argv += 2;
102 } else if (!strcmp(argv[2],"drainwait")) {
103 if (drainwait >= 0)
104 usage();
105 if (argv[3] == NULL || !isdigit(argv[3][0]))
106 usage();
107 drainwait = atoi(argv[3]);
108 argv += 2;
109 } else
110 usage();
111 }
112 if (dtrwait >= 0) {
113 if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
114 res = 1;
115 warn("TIOCMSDTRWAIT");
116 }
117 }
118 if (drainwait >= 0) {
119 if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
120 res = 1;
121 warn("TIOCSDRAINWAIT");
122 }
123 }
124 }
125
126 close(fd);
127 return res;
128}