1 /* 2 * Copyright (c) 1981 Regents of the University of California. 3 * 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[] = "from: @(#)tstp.c 5.7 (Berkeley) 8/23/92";*/ 36 static char rcsid[] = "$Id: tstp.c,v 1.4 1993/08/10 02:12:47 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <curses.h> 40 #include <errno.h> 41 #include <signal.h> 42 #include <termios.h> 43 #include <unistd.h> 44 45 /* 46 * tstp -- 47 * Handle stop and start signals. 48 */ 49 void 50 tstp(signo) 51 int signo; 52 { 53 struct termios save; 54 sigset_t set; 55 56 /* Get the current terminal state. */ 57 if (tcgetattr(STDIN_FILENO, &save)) 58 return; 59 60 /* Move the cursor to the end of the screen. */ 61 mvcur(0, COLS - 1, LINES - 1, 0); 62 63 /* End the window. */ 64 endwin(); 65 66 /* Stop ourselves. */ 67 (void)sigemptyset(&set); 68 (void)sigaddset(&set, signo); 69 (void)sigprocmask(SIG_UNBLOCK, &set, NULL); 70 (void)signal(signo, SIG_DFL); 71 (void)kill(0, signo); 72 73 /* Time passes ... */ 74 75 /* Reset the signal handler. */ 76 (void)signal(signo, tstp); 77 78 /* Reset the terminal state. */ 79 (void)tcsetattr(STDIN_FILENO, TCSADRAIN, &save); 80 81 /* Restart the screen. */ 82 wrefresh(curscr); 83 } 84