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keyboard.c revision 1.20 
      1 /*	$NetBSD: keyboard.c,v 1.20 2004/11/04 07:18:47 dsl 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 1.20 2004/11/04 07:18:47 dsl 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 
     47 #include "systat.h"
     48 #include "extern.h"
     49 
     50 void
     51 keyboard(void)
     52 {
     53 	int ch, rch;
     54 	char *line;
     55 	int i, linesz;
     56 
     57 	linesz = COLS - 2;		/* XXX does not get updated on SIGWINCH */
     58 	if ((line = malloc(linesz)) == NULL) {
     59 		error("malloc failed");
     60 		die(0);
     61 	}
     62 
     63 	for (;;) {
     64 		col = 0;
     65 		move(CMDLINE, 0);
     66 
     67 		while (col == 0 || (ch != '\r' && ch != '\n')) {
     68 			refresh();
     69 			ch = getch();
     70 			if (ch == ERR) {
     71 				display(SIGALRM);
     72 				continue;
     73 			}
     74 			if (ch == KEY_RESIZE) {
     75 				redraw(0);
     76 				continue;
     77 			}
     78 			ch &= 0177;
     79 			rch = ch;
     80 			if (col == 0) {
     81 				switch(ch) {
     82 				    case '\n':
     83 				    case '\r':
     84 				    case ' ':
     85 					display(0);
     86 					break;
     87 				    case CTRL('l'):
     88 					wrefresh(curscr);
     89 					break;
     90 				    case CTRL('g'):
     91 					status();
     92 					break;
     93 				    case '?':
     94 				    case 'H':
     95 				    case 'h':
     96 					command("help");
     97 					move(CMDLINE, 0);
     98 					break;
     99 				    case 'Q':
    100 				    case 'q':
    101 					command("quit");
    102 					break;
    103 				    case ':':
    104 					move(CMDLINE, 0);
    105 					clrtoeol();
    106 					addch(':');
    107 					col++;
    108 					break;
    109 				}
    110 				continue;
    111 			}
    112 			if (ch == erasechar() && col > 0) {
    113 				if (col == 1)
    114 					continue;
    115 				col--;
    116 				goto doerase;
    117 			}
    118 			if (ch == CTRL('w') && col > 0) {
    119 				while (--col >= 0 &&
    120 				    isspace((unsigned char)line[col]))
    121 					continue;
    122 				col++;
    123 				while (--col >= 0 &&
    124 				    !isspace((unsigned char)line[col]))
    125 					if (col == 0)
    126 						break;
    127 				col++;
    128 				goto doerase;
    129 			}
    130 			if (ch == killchar() && col > 0) {
    131 				col = 1;
    132 		doerase:
    133 				move(CMDLINE, col);
    134 				clrtoeol();
    135 				continue;
    136 			}
    137 			if (isprint(rch) || rch == ' ') {
    138 				if (col < linesz) {
    139 					line[col] = rch;
    140 					mvaddch(CMDLINE, col, rch);
    141 					col++;
    142 				}
    143 			}
    144 		}
    145 		line[col] = '\0';
    146 		/* pass commands as lowercase */
    147 		for (i = 1; i < col ; i++)
    148 			line[i] = tolower((unsigned char)line[i]);
    149 		command(line + 1);
    150 	}
    151 	/* NOTREACHED */
    152 }
    153