usr.bin/systat/keyboard.c

   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)keyboard.c       8.1 (Berkeley) 6/6/93
  30  *
  31  * $DragonFly: src/usr.bin/systat/keyboard.c,v 1.3 2003/10/04 20:36:51 hmp Exp $
  32  */
  33
  34 #include <ctype.h>
  35 #include <signal.h>
  36 #include <termios.h>
  37
  38 #include "systat.h"
  39 #include "extern.h"
  40
  41 int
  42 keyboard(void)
  43 {
  44         char ch, line[80];
  45         int oldmask;
  46
  47         for (;;) {
  48                 col = 0;
  49                 move(CMDLINE, 0);
  50                 do {
  51                         refresh();
  52                         ch = getch() & 0177;
  53                         if (ch == 0177 && ferror(stdin)) {
  54                                 clearerr(stdin);
  55                                 continue;
  56                         }
  57                         if (ch >= 'A' && ch <= 'Z')
  58                                 ch += 'a' - 'A';
  59                         if (col == 0) {
  60 #define mask(s) (1 << ((s) - 1))
  61                                 if (ch == CTRL('l')) {
  62                                         oldmask = sigblock(mask(SIGALRM));
  63                                         wrefresh(curscr);
  64                                         sigsetmask(oldmask);
  65                                         continue;
  66                                 }
  67                                 if (ch == CTRL('g')) {
  68                                         oldmask = sigblock(mask(SIGALRM));
  69                                         status();
  70                                         sigsetmask(oldmask);
  71                                         continue;
  72                                 }
  73                                 if (ch != ':')
  74                                         continue;
  75                                 move(CMDLINE, 0);
  76                                 clrtoeol();
  77                         }
  78                         if (ch == erasechar() && col > 0) {
  79                                 if (col == 1 && line[0] == ':')
  80                                         continue;
  81                                 col--;
  82                                 goto doerase;
  83                         }
  84                         if (ch == CTRL('w') && col > 0) {
  85                                 while (--col >= 0 && isspace(line[col]))
  86                                         ;
  87                                 col++;
  88                                 while (--col >= 0 && !isspace(line[col]))
  89                                         if (col == 0 && line[0] == ':')
  90                                                 break;
  91                                 col++;
  92                                 goto doerase;
  93                         }
  94                         if (ch == killchar() && col > 0) {
  95                                 col = 0;
  96                                 if (line[0] == ':')
  97                                         col++;
  98                 doerase:
  99                                 move(CMDLINE, col);
 100                                 clrtoeol();
 101                                 continue;
 102                         }
 103                         if (isprint(ch) || ch == ' ') {
 104                                 line[col] = ch;
 105                                 mvaddch(CMDLINE, col, ch);
 106                                 col++;
 107                         }
 108                 } while (col == 0 || (ch != '\r' && ch != '\n'));
 109                 line[col] = '\0';
 110                 oldmask = sigblock(mask(SIGALRM));
 111                 command(line + 1);
 112                 sigsetmask(oldmask);
 113         }
 114         /*NOTREACHED*/
 115 }