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keyboard.c revision 1.4 
      1 /*	$NetBSD: keyboard.c,v 1.4 1997/07/21 07:05:02 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. 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 1.4 1997/07/21 07:05:02 mrg Exp $");
     42 #endif /* not lint */
     43 
     44 #include <ctype.h>
     45 #include <signal.h>
     46 #include <termios.h>
     47 
     48 #include "systat.h"
     49 #include "extern.h"
     50 
     51 int
     52 keyboard()
     53 {
     54 	char ch, line[80];
     55 	sigset_t set;
     56 
     57 	sigemptyset(&set);
     58 	sigaddset(&set, SIGALRM);
     59 
     60 	for (;;) {
     61 		col = 0;
     62 		move(CMDLINE, 0);
     63 		do {
     64 			refresh();
     65 			ch = getch() & 0177;
     66 			if (ch == 0177 && ferror(stdin)) {
     67 				clearerr(stdin);
     68 				continue;
     69 			}
     70 			if (ch >= 'A' && ch <= 'Z')
     71 				ch += 'a' - 'A';
     72 			if (col == 0) {
     73 				if (ch == CTRL('l')) {
     74 					sigprocmask(SIG_BLOCK, &set, NULL);
     75 					wrefresh(curscr);
     76 					sigprocmask(SIG_UNBLOCK, &set, NULL);
     77 					continue;
     78 				}
     79 				if (ch == CTRL('g')) {
     80 					sigprocmask(SIG_BLOCK, &set, NULL);
     81 					status();
     82 					sigprocmask(SIG_UNBLOCK, &set, NULL);
     83 					continue;
     84 				}
     85 				if (ch != ':')
     86 					continue;
     87 				move(CMDLINE, 0);
     88 				clrtoeol();
     89 			}
     90 			if (ch == erasechar() && col > 0) {
     91 				if (col == 1 && line[0] == ':')
     92 					continue;
     93 				col--;
     94 				goto doerase;
     95 			}
     96 			if (ch == CTRL('w') && col > 0) {
     97 				while (--col >= 0 && isspace(line[col]));
     98 				col++;
     99 				while (--col >= 0 && !isspace(line[col]))
    100 					if (col == 0 && line[0] == ':')
    101 						break;
    102 				col++;
    103 				goto doerase;
    104 			}
    105 			if (ch == killchar() && col > 0) {
    106 				col = 0;
    107 				if (line[0] == ':')
    108 					col++;
    109 		doerase:
    110 				move(CMDLINE, col);
    111 				clrtoeol();
    112 				continue;
    113 			}
    114 			if (isprint(ch) || ch == ' ') {
    115 				line[col] = ch;
    116 				mvaddch(CMDLINE, col, ch);
    117 				col++;
    118 			}
    119 		} while (col == 0 || (ch != '\r' && ch != '\n'));
    120 		line[col] = '\0';
    121 		sigprocmask(SIG_BLOCK, &set, NULL);
    122 		command(line + 1);
    123 		sigprocmask(SIG_UNBLOCK, &set, NULL);
    124 	}
    125 	/* NOTREACHED */
    126 }
    127