1/*	$NetBSD: keyboard.c,v 1.1.1.1 2009/12/13 16:54:33 kardel Exp $	*/
2
3/*
4 * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (C) 2000, 2001  Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20/* Id: keyboard.c,v 1.13 2007/06/19 23:47:18 tbox Exp */
21
22#include <config.h>
23
24#include <sys/param.h>
25#include <sys/types.h>
26#include <sys/time.h>
27#include <sys/uio.h>
28
29#include <errno.h>
30#include <stdlib.h>
31#include <string.h>
32#include <termios.h>
33#include <unistd.h>
34#include <fcntl.h>
35
36#include <isc/keyboard.h>
37#include <isc/util.h>
38
39isc_result_t
40isc_keyboard_open(isc_keyboard_t *keyboard) {
41	int fd;
42	isc_result_t ret;
43	struct termios current_mode;
44
45	REQUIRE(keyboard != NULL);
46
47	fd = open("/dev/tty", O_RDONLY, 0);
48	if (fd < 0)
49		return (ISC_R_IOERROR);
50
51	keyboard->fd = fd;
52
53	if (tcgetattr(fd, &keyboard->saved_mode) < 0) {
54		ret = ISC_R_IOERROR;
55		goto errout;
56	}
57
58	current_mode = keyboard->saved_mode;
59
60	current_mode.c_iflag &=
61			~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
62	current_mode.c_oflag &= ~OPOST;
63	current_mode.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
64	current_mode.c_cflag &= ~(CSIZE|PARENB);
65	current_mode.c_cflag |= CS8;
66
67	current_mode.c_cc[VMIN] = 1;
68	current_mode.c_cc[VTIME] = 0;
69	if (tcsetattr(fd, TCSAFLUSH, &current_mode) < 0) {
70		ret = ISC_R_IOERROR;
71		goto errout;
72	}
73
74	keyboard->result = ISC_R_SUCCESS;
75
76	return (ISC_R_SUCCESS);
77
78 errout:
79	close (fd);
80
81	return (ret);
82}
83
84isc_result_t
85isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
86	REQUIRE(keyboard != NULL);
87
88	if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED)
89		(void)sleep(sleeptime);
90
91	(void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode);
92	(void)close(keyboard->fd);
93
94	keyboard->fd = -1;
95
96	return (ISC_R_SUCCESS);
97}
98
99isc_result_t
100isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
101	ssize_t cc;
102	unsigned char c;
103	cc_t *controlchars;
104
105	REQUIRE(keyboard != NULL);
106	REQUIRE(cp != NULL);
107
108	cc = read(keyboard->fd, &c, 1);
109	if (cc < 0) {
110		keyboard->result = ISC_R_IOERROR;
111		return (keyboard->result);
112	}
113
114	controlchars = keyboard->saved_mode.c_cc;
115	if (c == controlchars[VINTR] || c == controlchars[VQUIT]) {
116		keyboard->result = ISC_R_CANCELED;
117		return (keyboard->result);
118	}
119
120	*cp = c;
121
122	return (ISC_R_SUCCESS);
123}
124
125isc_boolean_t
126isc_keyboard_canceled(isc_keyboard_t *keyboard) {
127	return (ISC_TF(keyboard->result == ISC_R_CANCELED));
128}
129