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keyboard.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1980, 1992, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)keyboard.c	8.1 (Berkeley) 6/6/93";
     36 #endif /* not lint */
     37 
     38 #include <ctype.h>
     39 #include <signal.h>
     40 #include <termios.h>
     41 
     42 #include "systat.h"
     43 #include "extern.h"
     44 
     45 int
     46 keyboard()
     47 {
     48         char ch, line[80];
     49 	int oldmask;
     50 
     51         for (;;) {
     52                 col = 0;
     53                 move(CMDLINE, 0);
     54                 do {
     55                         refresh();
     56                         ch = getch() & 0177;
     57                         if (ch == 0177 && ferror(stdin)) {
     58                                 clearerr(stdin);
     59                                 continue;
     60                         }
     61                         if (ch >= 'A' && ch <= 'Z')
     62                                 ch += 'a' - 'A';
     63                         if (col == 0) {
     64 #define	mask(s)	(1 << ((s) - 1))
     65                                 if (ch == CTRL('l')) {
     66 					oldmask = sigblock(mask(SIGALRM));
     67 					wrefresh(curscr);
     68 					sigsetmask(oldmask);
     69                                         continue;
     70                                 }
     71 				if (ch == CTRL('g')) {
     72 					oldmask = sigblock(mask(SIGALRM));
     73 					status();
     74 					sigsetmask(oldmask);
     75 					continue;
     76 				}
     77                                 if (ch != ':')
     78                                         continue;
     79                                 move(CMDLINE, 0);
     80                                 clrtoeol();
     81                         }
     82                         if (ch == erasechar() && col > 0) {
     83                                 if (col == 1 && line[0] == ':')
     84                                         continue;
     85                                 col--;
     86                                 goto doerase;
     87                         }
     88                         if (ch == CTRL('w') && col > 0) {
     89                                 while (--col >= 0 && isspace(line[col]))
     90                                         ;
     91                                 col++;
     92                                 while (--col >= 0 && !isspace(line[col]))
     93                                         if (col == 0 && line[0] == ':')
     94                                                 break;
     95                                 col++;
     96                                 goto doerase;
     97                         }
     98                         if (ch == killchar() && col > 0) {
     99                                 col = 0;
    100                                 if (line[0] == ':')
    101                                         col++;
    102                 doerase:
    103                                 move(CMDLINE, col);
    104                                 clrtoeol();
    105                                 continue;
    106                         }
    107                         if (isprint(ch) || ch == ' ') {
    108                                 line[col] = ch;
    109                                 mvaddch(CMDLINE, col, ch);
    110                                 col++;
    111                         }
    112                 } while (col == 0 || (ch != '\r' && ch != '\n'));
    113                 line[col] = '\0';
    114 		oldmask = sigblock(mask(SIGALRM));
    115                 command(line + 1);
    116 		sigsetmask(oldmask);
    117         }
    118 	/*NOTREACHED*/
    119 }
    120