NetBSD/lib/libcurses/tstp.c

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/*
* Copyright (c) 1981 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
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/*static char sccsid[] = "from: @(#)tstp.c 5.7 (Berkeley) 8/23/92";*/
static char rcsid[] = "$Id: tstp.c,v 1.4 1993/08/10 02:12:47 mycroft Exp $";
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#endif /* not lint */
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#include <curses.h>
#include <errno.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>
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/*
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* tstp --
* Handle stop and start signals.
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*/
void
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tstp(signo)
int signo;
{
struct termios save;
sigset_t set;
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/* Get the current terminal state. */
if (tcgetattr(STDIN_FILENO, &save))
return;
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/* Move the cursor to the end of the screen. */
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mvcur(0, COLS - 1, LINES - 1, 0);
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/* End the window. */
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endwin();
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/* Stop ourselves. */
(void)sigemptyset(&set);
(void)sigaddset(&set, signo);
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(void)sigprocmask(SIG_UNBLOCK, &set, NULL);
(void)signal(signo, SIG_DFL);
(void)kill(0, signo);
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/* Time passes ... */
/* Reset the signal handler. */
(void)signal(signo, tstp);
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/* Reset the terminal state. */
(void)tcsetattr(STDIN_FILENO, TCSADRAIN, &save);
/* Restart the screen. */
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wrefresh(curscr);
}