1 /* $NetBSD: keyboard.c,v 1.16 2004/03/27 00:53:59 martin 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 1.16 2004/03/27 00:53:59 martin 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 47 #include "systat.h" 48 #include "extern.h" 49 50 void 51 keyboard(void) 52 { 53 char ch, rch, *line; 54 int i, linesz; 55 sigset_t set; 56 57 sigemptyset(&set); 58 sigaddset(&set, SIGALRM); 59 60 linesz = COLS - 2; /* XXX does not get updated on SIGWINCH */ 61 if ((line = malloc(linesz)) == NULL) { 62 error("malloc failed"); 63 die(0); 64 } 65 66 for (;;) { 67 col = 0; 68 move(CMDLINE, 0); 69 70 while (col == 0 || (ch != '\r' && ch != '\n')) { 71 refresh(); 72 ch = getch() & 0177; 73 if (ch == 0177 && ferror(stdin)) { 74 clearerr(stdin); 75 continue; 76 } 77 rch = ch; 78 if (col == 0) { 79 switch(ch) { 80 case '\n': 81 case '\r': 82 case ' ': 83 display(0); 84 break; 85 case CTRL('l'): 86 sigprocmask(SIG_BLOCK, &set, NULL); 87 wrefresh(curscr); 88 sigprocmask(SIG_UNBLOCK, &set, NULL); 89 break; 90 case CTRL('g'): 91 sigprocmask(SIG_BLOCK, &set, NULL); 92 status(); 93 sigprocmask(SIG_UNBLOCK, &set, NULL); 94 break; 95 case '?': 96 case 'H': 97 case 'h': 98 command("help"); 99 move(CMDLINE, 0); 100 break; 101 case 'Q': 102 case 'q': 103 command("quit"); 104 break; 105 case ':': 106 move(CMDLINE, 0); 107 clrtoeol(); 108 addch(':'); 109 col++; 110 break; 111 } 112 continue; 113 } 114 if (ch == erasechar() && col > 0) { 115 if (col == 1) 116 continue; 117 col--; 118 goto doerase; 119 } 120 if (ch == CTRL('w') && col > 0) { 121 while (--col >= 0 && isspace(line[col])); 122 col++; 123 while (--col >= 0 && !isspace(line[col])) 124 if (col == 0) 125 break; 126 col++; 127 goto doerase; 128 } 129 if (ch == killchar() && col > 0) { 130 col = 1; 131 doerase: 132 move(CMDLINE, col); 133 clrtoeol(); 134 continue; 135 } 136 if (isprint(rch) || rch == ' ') { 137 if (col < linesz) { 138 line[col] = rch; 139 mvaddch(CMDLINE, col, rch); 140 col++; 141 } 142 } 143 } 144 line[col] = '\0'; 145 /* pass commands as lowercase */ 146 for (i = 1; i < col ; i++) 147 line[i] = tolower(line[i]); 148 command(line + 1); 149 } 150 /* NOTREACHED */ 151 } 152