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keyboard.c revision 1.22 
      1 /*	$NetBSD: keyboard.c,v 1.22 2005/02/26 22:12:33 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 1.22 2005/02/26 22:12:33 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 #include <string.h>
     47 
     48 #include "systat.h"
     49 #include "extern.h"
     50 
     51 void
     52 keyboard(void)
     53 {
     54 	int ch, rch, col;
     55 	char *line;
     56 	int i, linesz;
     57 	static char help[] = "help";
     58 	static char quit[] = "quit";
     59 
     60 	linesz = COLS - 2;		/* XXX does not get updated on SIGWINCH */
     61 	if ((line = malloc(linesz)) == NULL) {
     62 		error("malloc failed");
     63 		die(0);
     64 	}
     65 
     66 	for (;;) {
     67 		col = 0;
     68 		move(CMDLINE, 0);
     69 
     70 		while (col == 0 || (ch != '\r' && ch != '\n')) {
     71 			refresh();
     72 			ch = getch();
     73 			if (ch == ERR) {
     74 				display(SIGALRM);
     75 				continue;
     76 			}
     77 			if (ch == KEY_RESIZE) {
     78 				redraw(0);
     79 				continue;
     80 			}
     81 			ch &= 0177;
     82 			rch = ch;
     83 			if (col == 0) {
     84 				switch(ch) {
     85 				    case '\n':
     86 				    case '\r':
     87 				    case ' ':
     88 					display(0);
     89 					break;
     90 				    case CTRL('l'):
     91 					wrefresh(curscr);
     92 					break;
     93 				    case CTRL('g'):
     94 					status();
     95 					break;
     96 				    case '?':
     97 				    case 'H':
     98 				    case 'h':
     99 					command(help);
    100 					move(CMDLINE, 0);
    101 					break;
    102 				    case 'Q':
    103 				    case 'q':
    104 					command(quit);
    105 					break;
    106 				    case ':':
    107 					move(CMDLINE, 0);
    108 					clrtoeol();
    109 					addch(':');
    110 					col++;
    111 					break;
    112 				}
    113 				continue;
    114 			}
    115 			if (ch == '\b' || ch == '\?' || ch == erasechar()) {
    116 				if (col > 0)
    117 					col--;
    118 				goto doerase;
    119 			}
    120 			if (ch == CTRL('w') && col > 0) {
    121 				while (--col >= 0 &&
    122 				    isspace((unsigned char)line[col]))
    123 					continue;
    124 				col++;
    125 				while (--col >= 0 &&
    126 				    !isspace((unsigned char)line[col]))
    127 					if (col == 0)
    128 						break;
    129 				col++;
    130 				goto doerase;
    131 			}
    132 			if (ch == killchar() && col > 0) {
    133 				col = 1;
    134 		doerase:
    135 				move(CMDLINE, col);
    136 				clrtoeol();
    137 				continue;
    138 			}
    139 			if (isprint(rch) || rch == ' ') {
    140 				if (col < linesz) {
    141 					line[col] = rch;
    142 					mvaddch(CMDLINE, col, rch);
    143 					col++;
    144 				}
    145 			}
    146 		}
    147 		line[col] = '\0';
    148 		/* pass commands as lowercase */
    149 		for (i = 1; i < col ; i++)
    150 			line[i] = tolower((unsigned char)line[i]);
    151 		command(line + 1);
    152 	}
    153 	/* NOTREACHED */
    154 }
    155