comcontrol.c revision 5397 
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/* comcontrol.c */
30
31#include <sys/types.h>
32#include <sys/ioctl.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <ctype.h>
36#include <fcntl.h>
37
38
39void usage(char *progname)
40{
41	fprintf(stderr, "usage: %s <filename> [dtrwait <n>] [drainwait <n>]\n", progname);
42	exit(1);
43}
44
45int main(int argc, char *argv[])
46{
47	int	fd;
48	int     res = 0;
49	int     dtrwait = -1, drainwait = -1;
50
51	if ((argc < 2) || (argc > 5)) usage(argv[0]);
52
53	fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0);
54	if (fd < 0) {
55		perror("open");
56		fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]);
57		return 1;
58	}
59
60	if (argc == 2) {
61		if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) {
62			res = 1;
63			perror("TIOCMGDTRWAIT");
64		}
65		if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) {
66			res = 1;
67			perror("TIOCGDRAINWAIT");
68		}
69		printf("dtrwait %d drainwait %d\n", dtrwait, drainwait);
70	} else {
71		char *prg = argv[0];
72
73		while (argv[2] != NULL) {
74			if (!strcmp(argv[2],"dtrwait")) {
75				if (dtrwait >= 0)
76					usage(prg);
77				if (argv[3] == NULL || !isdigit(argv[3][0]))
78					usage(prg);
79				dtrwait = atoi(argv[3]);
80				argv += 2;
81			} else if (!strcmp(argv[2],"drainwait")) {
82				if (drainwait >= 0)
83					usage(prg);
84				if (argv[3] == NULL || !isdigit(argv[3][0]))
85					usage(prg);
86				drainwait = atoi(argv[3]);
87				argv += 2;
88			} else
89				usage(prg);
90		}
91		if (dtrwait >= 0) {
92			if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) {
93				res = 1;
94				perror("TIOCMSDTRWAIT");
95			}
96		}
97		if (drainwait >= 0) {
98			if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) {
99				res = 1;
100				perror("TIOCSDRAINWAIT");
101			}
102		}
103	}
104
105	close(fd);
106	return res;
107}
108