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 } 116