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keyboard.c revision 1.8 
      1 /*	$NetBSD: keyboard.c,v 1.8 1999/12/20 20:49:06 jwise 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)keyboard.c	8.1 (Berkeley) 6/6/93";
     40 #endif
     41 __RCSID("$NetBSD: keyboard.c,v 1.8 1999/12/20 20:49:06 jwise Exp $");
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 
     46 #include <ctype.h>
     47 #include <curses.h>
     48 #include <signal.h>
     49 #include <termios.h>
     50 #include <stdlib.h>
     51 
     52 #include "systat.h"
     53 #include "extern.h"
     54 
     55 int
     56 keyboard()
     57 {
     58 	char ch, rch, *line;
     59 	int i, linesz;
     60 	sigset_t set;
     61 
     62 	sigemptyset(&set);
     63 	sigaddset(&set, SIGALRM);
     64 
     65 	linesz = COLS - 2;		/* XXX does not get updated on SIGWINCH */
     66 	line = malloc(linesz);
     67 	if (line == NULL) {
     68 		error("malloc");
     69 		exit(1);
     70 	}
     71 
     72 	for (;;) {
     73 		col = 0;
     74 		move(CMDLINE, 0);
     75 
     76 		while (col == 0 || (ch != '\r' && ch != '\n')) {
     77 			refresh();
     78 			ch = getch() & 0177;
     79 			if (ch == 0177 && ferror(stdin)) {
     80 				clearerr(stdin);
     81 				continue;
     82 			}
     83 			rch = ch;
     84 			ch = tolower(ch);
     85 			if (col == 0) {
     86 				switch(ch) {
     87 				    case '\n':
     88 				    case '\r':
     89 				    case ' ':
     90 					display(0);
     91 					break;
     92 				    case CTRL('l'):
     93 					sigprocmask(SIG_BLOCK, &set, NULL);
     94 					wrefresh(curscr);
     95 					sigprocmask(SIG_UNBLOCK, &set, NULL);
     96 					break;
     97 				    case CTRL('g'):
     98 					sigprocmask(SIG_BLOCK, &set, NULL);
     99 					status();
    100 					sigprocmask(SIG_UNBLOCK, &set, NULL);
    101 					break;
    102 				    case '?':
    103 				    case 'h':
    104 					command("help");
    105 					move(CMDLINE, 0);
    106 					break;
    107 				    case ':':
    108 					move(CMDLINE, 0);
    109 					clrtoeol();
    110 					addch(':');
    111 					col++;
    112 					break;
    113 				}
    114 				continue;
    115 			}
    116 			if (ch == erasechar() && col > 0) {
    117 				if (col == 1)
    118 					continue;
    119 				col--;
    120 				goto doerase;
    121 			}
    122 			if (ch == CTRL('w') && col > 0) {
    123 				while (--col >= 0 && isspace(line[col]));
    124 				col++;
    125 				while (--col >= 0 && !isspace(line[col]))
    126 					if (col == 0)
    127 						break;
    128 				col++;
    129 				goto doerase;
    130 			}
    131 			if (ch == killchar() && col > 0) {
    132 				col = 1;
    133 		doerase:
    134 				move(CMDLINE, col);
    135 				clrtoeol();
    136 				continue;
    137 			}
    138 			if (isprint(rch) || rch == ' ') {
    139 				if (col < linesz) {
    140 					line[col] = rch;
    141 					mvaddch(CMDLINE, col, rch);
    142 					col++;
    143 				}
    144 			}
    145 		}
    146 		line[col] = '\0';
    147 		/* pass commands as lowercase */
    148 		for (i = 1; i < col ; i++)
    149 			line[i] = tolower(line[i]);
    150 		sigprocmask(SIG_BLOCK, &set, NULL);
    151 		command(line + 1);
    152 		sigprocmask(SIG_UNBLOCK, &set, NULL);
    153 	}
    154 	/* NOTREACHED */
    155 }
    156