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keyboard.c revision 1.3 
      1 /*	$NetBSD: keyboard.c,v 1.3 1996/12/13 19:26:20 scottr 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 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)keyboard.c	8.1 (Berkeley) 6/6/93";
     39 #endif
     40 static char rcsid[] = "$NetBSD: keyboard.c,v 1.3 1996/12/13 19:26:20 scottr Exp $";
     41 #endif /* not lint */
     42 
     43 #include <ctype.h>
     44 #include <signal.h>
     45 #include <termios.h>
     46 
     47 #include "systat.h"
     48 #include "extern.h"
     49 
     50 int
     51 keyboard()
     52 {
     53 	char ch, line[80];
     54 	sigset_t set;
     55 
     56 	sigemptyset(&set);
     57 	sigaddset(&set, SIGALRM);
     58 
     59 	for (;;) {
     60 		col = 0;
     61 		move(CMDLINE, 0);
     62 		do {
     63 			refresh();
     64 			ch = getch() & 0177;
     65 			if (ch == 0177 && ferror(stdin)) {
     66 				clearerr(stdin);
     67 				continue;
     68 			}
     69 			if (ch >= 'A' && ch <= 'Z')
     70 				ch += 'a' - 'A';
     71 			if (col == 0) {
     72 				if (ch == CTRL('l')) {
     73 					sigprocmask(SIG_BLOCK, &set, NULL);
     74 					wrefresh(curscr);
     75 					sigprocmask(SIG_UNBLOCK, &set, NULL);
     76 					continue;
     77 				}
     78 				if (ch == CTRL('g')) {
     79 					sigprocmask(SIG_BLOCK, &set, NULL);
     80 					status();
     81 					sigprocmask(SIG_UNBLOCK, &set, NULL);
     82 					continue;
     83 				}
     84 				if (ch != ':')
     85 					continue;
     86 				move(CMDLINE, 0);
     87 				clrtoeol();
     88 			}
     89 			if (ch == erasechar() && col > 0) {
     90 				if (col == 1 && line[0] == ':')
     91 					continue;
     92 				col--;
     93 				goto doerase;
     94 			}
     95 			if (ch == CTRL('w') && col > 0) {
     96 				while (--col >= 0 && isspace(line[col]));
     97 				col++;
     98 				while (--col >= 0 && !isspace(line[col]))
     99 					if (col == 0 && line[0] == ':')
    100 						break;
    101 				col++;
    102 				goto doerase;
    103 			}
    104 			if (ch == killchar() && col > 0) {
    105 				col = 0;
    106 				if (line[0] == ':')
    107 					col++;
    108 		doerase:
    109 				move(CMDLINE, col);
    110 				clrtoeol();
    111 				continue;
    112 			}
    113 			if (isprint(ch) || ch == ' ') {
    114 				line[col] = ch;
    115 				mvaddch(CMDLINE, col, ch);
    116 				col++;
    117 			}
    118 		} while (col == 0 || (ch != '\r' && ch != '\n'));
    119 		line[col] = '\0';
    120 		sigprocmask(SIG_BLOCK, &set, NULL);
    121 		command(line + 1);
    122 		sigprocmask(SIG_UNBLOCK, &set, NULL);
    123 	}
    124 	/* NOTREACHED */
    125 }
    126