1/*	$NetBSD: keyboard.c,v 1.23 2006/05/10 21:53:48 mrg Exp $	*/
2
3/*-
4 * Copyright (c) 1980, 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)keyboard.c	8.1 (Berkeley) 6/6/93";
36#endif
37__RCSID("$NetBSD: keyboard.c,v 1.23 2006/05/10 21:53:48 mrg Exp $");
38#endif /* not lint */
39
40#include <sys/types.h>
41
42#include <ctype.h>
43#include <signal.h>
44#include <termios.h>
45#include <stdlib.h>
46#include <string.h>
47#include <signal.h>
48
49#include "systat.h"
50#include "extern.h"
51
52extern sig_atomic_t needsredraw;
53
54void
55keyboard(void)
56{
57	int ch, rch, col;
58	char *line;
59	int i, linesz;
60	static char help[] = "help";
61	static char quit[] = "quit";
62
63	ch = 0;	/* XXX gcc */
64	linesz = COLS - 2;		/* XXX does not get updated on SIGWINCH */
65	if ((line = malloc(linesz)) == NULL) {
66		error("malloc failed");
67		die(0);
68	}
69
70	for (;;) {
71		col = 0;
72		move(CMDLINE, 0);
73
74		while (col == 0 || (ch != '\r' && ch != '\n')) {
75			refresh();
76			for (;;) {
77				ch = getch();
78				if (!needsredraw)
79					break;
80				redraw();
81			}
82			if (ch == ERR) {
83				display(SIGALRM);
84				continue;
85			}
86			if (ch == KEY_RESIZE) {
87				redraw();
88				continue;
89			}
90			ch &= 0177;
91			rch = ch;
92			if (col == 0) {
93				switch(ch) {
94				    case '\n':
95				    case '\r':
96				    case ' ':
97					display(0);
98					break;
99				    case CTRL('l'):
100					wrefresh(curscr);
101					break;
102				    case CTRL('g'):
103					status();
104					break;
105				    case '?':
106				    case 'H':
107				    case 'h':
108					command(help);
109					move(CMDLINE, 0);
110					break;
111				    case 'Q':
112				    case 'q':
113					command(quit);
114					break;
115				    case ':':
116					move(CMDLINE, 0);
117					clrtoeol();
118					addch(':');
119					col++;
120					break;
121				}
122				continue;
123			}
124			if (ch == '\b' || ch == '\?' || ch == erasechar()) {
125				if (col > 0)
126					col--;
127				goto doerase;
128			}
129			if (ch == CTRL('w') && col > 0) {
130				while (--col >= 0 &&
131				    isspace((unsigned char)line[col]))
132					continue;
133				col++;
134				while (--col >= 0 &&
135				    !isspace((unsigned char)line[col]))
136					if (col == 0)
137						break;
138				col++;
139				goto doerase;
140			}
141			if (ch == killchar() && col > 0) {
142				col = 1;
143		doerase:
144				move(CMDLINE, col);
145				clrtoeol();
146				continue;
147			}
148			if (isprint(rch) || rch == ' ') {
149				if (col < linesz) {
150					line[col] = rch;
151					mvaddch(CMDLINE, col, rch);
152					col++;
153				}
154			}
155		}
156		line[col] = '\0';
157		/* pass commands as lowercase */
158		for (i = 1; i < col ; i++)
159			line[i] = tolower((unsigned char)line[i]);
160		command(line + 1);
161	}
162	/* NOTREACHED */
163}
164