1 /* $NetBSD: keyboard.c,v 1.26 2015/08/23 18:33:15 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
35 static char sccsid[] = "@(#)keyboard.c 8.1 (Berkeley) 6/6/93";
36 #endif
37 __RCSID("$NetBSD: keyboard.c,v 1.26 2015/08/23 18:33:15 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
52 extern sig_atomic_t needsredraw;
53
54 void
keyboard(void)55 keyboard(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 clearerror();
98 display(0);
99 break;
100 case CTRL('l'):
101 clearerror();
102 wrefresh(curscr);
103 break;
104 case CTRL('g'):
105 status();
106 break;
107 case '?':
108 case 'H':
109 case 'h':
110 command(help);
111 move(CMDLINE, 0);
112 break;
113 case 'Q':
114 case 'q':
115 command(quit);
116 break;
117 case ':':
118 move(CMDLINE, 0);
119 clrtoeol();
120 addch(':');
121 col++;
122 break;
123 }
124 continue;
125 }
126 if (ch == '\b' || ch == '\177' || ch == erasechar()) {
127 if (col > 0)
128 col--;
129 goto doerase;
130 }
131 if (ch == CTRL('w') && col > 0) {
132 while (--col >= 0 &&
133 isspace((unsigned char)line[col]))
134 continue;
135 col++;
136 while (--col >= 0 &&
137 !isspace((unsigned char)line[col]))
138 if (col == 0)
139 break;
140 col++;
141 goto doerase;
142 }
143 if (ch == killchar() && col > 0) {
144 col = 1;
145 doerase:
146 move(CMDLINE, col);
147 clrtoeol();
148 continue;
149 }
150 if (isprint(rch) || rch == ' ') {
151 if (col < linesz) {
152 line[col] = rch;
153 mvaddch(CMDLINE, col, rch);
154 col++;
155 }
156 }
157 }
158 line[col] = '\0';
159 /* pass commands as lowercase */
160 for (i = 1; i < col ; i++)
161 line[i] = tolower((unsigned char)line[i]);
162 command(line + 1);
163 }
164 /* NOTREACHED */
165 }
166