usr.bin/systat/keyboard.c

   1 /*      $NetBSD: keyboard.c,v 1.23 2006/05/10 21:53:48 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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)keyboard.c  8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: keyboard.c,v 1.23 2006/05/10 21:53:48 mrg Exp $");
  38 #endif /* not lint */
  39
  40 #include <sys/types.h>
  41
  42 #include <ctype.h>
  43 #include <signal.h>
  44 #include <termios.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <signal.h>
  48
  49 #include "systat.h"
  50 #include "extern.h"
  51
  52 extern sig_atomic_t needsredraw;
  53
  54 void
  55 keyboard(void)
  56 {
  57         int ch, rch, col;
  58         char *line;
  59         int i, linesz;
  60         static char help[] = "help";
  61         static char quit[] = "quit";
  62
  63         ch = 0; /* XXX gcc */
  64         linesz = COLS - 2;              /* XXX does not get updated on SIGWINCH */
  65         if ((line = malloc(linesz)) == NULL) {
  66                 error("malloc failed");
  67                 die(0);
  68         }
  69
  70         for (;;) {
  71                 col = 0;
  72                 move(CMDLINE, 0);
  73
  74                 while (col == 0 || (ch != '\r' && ch != '\n')) {
  75                         refresh();
  76                         for (;;) {
  77                                 ch = getch();
  78                                 if (!needsredraw)
  79                                         break;
  80                                 redraw();
  81                         }
  82                         if (ch == ERR) {
  83                                 display(SIGALRM);
  84                                 continue;
  85                         }
  86                         if (ch == KEY_RESIZE) {
  87                                 redraw();
  88                                 continue;
  89                         }
  90                         ch &= 0177;
  91                         rch = ch;
  92                         if (col == 0) {
  93                                 switch(ch) {
  94                                     case '\n':
  95                                     case '\r':
  96                                     case ' ':
  97                                         display(0);
  98                                         break;
  99                                     case CTRL('l'):
 100                                         wrefresh(curscr);
 101                                         break;
 102                                     case CTRL('g'):
 103                                         status();
 104                                         break;
 105                                     case '?':
 106                                     case 'H':
 107                                     case 'h':
 108                                         command(help);
 109                                         move(CMDLINE, 0);
 110                                         break;
 111                                     case 'Q':
 112                                     case 'q':
 113                                         command(quit);
 114                                         break;
 115                                     case ':':
 116                                         move(CMDLINE, 0);
 117                                         clrtoeol();
 118                                         addch(':');
 119                                         col++;
 120                                         break;
 121                                 }
 122                                 continue;
 123                         }
 124                         if (ch == '\b' || ch == '\?' || ch == erasechar()) {
 125                                 if (col > 0)
 126                                         col--;
 127                                 goto doerase;
 128                         }
 129                         if (ch == CTRL('w') && col > 0) {
 130                                 while (--col >= 0 &&
 131                                     isspace((unsigned char)line[col]))
 132                                         continue;
 133                                 col++;
 134                                 while (--col >= 0 &&
 135                                     !isspace((unsigned char)line[col]))
 136                                         if (col == 0)
 137                                                 break;
 138                                 col++;
 139                                 goto doerase;
 140                         }
 141                         if (ch == killchar() && col > 0) {
 142                                 col = 1;
 143                 doerase:
 144                                 move(CMDLINE, col);
 145                                 clrtoeol();
 146                                 continue;
 147                         }
 148                         if (isprint(rch) || rch == ' ') {
 149                                 if (col < linesz) {
 150                                         line[col] = rch;
 151                                         mvaddch(CMDLINE, col, rch);
 152                                         col++;
 153                                 }
 154                         }
 155                 }
 156                 line[col] = '\0';
 157                 /* pass commands as lowercase */
 158                 for (i = 1; i < col ; i++)
 159                         line[i] = tolower((unsigned char)line[i]);
 160                 command(line + 1);
 161         }
 162         /* NOTREACHED */
 163 }