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tstp.c revision 1.1.1.1 
      1  1.1  cgd /*
      2  1.1  cgd  * Copyright (c) 1981 Regents of the University of California.
      3  1.1  cgd  * All rights reserved.
      4  1.1  cgd  *
      5  1.1  cgd  * Redistribution and use in source and binary forms, with or without
      6  1.1  cgd  * modification, are permitted provided that the following conditions
      7  1.1  cgd  * are met:
      8  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
      9  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     10  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     13  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     14  1.1  cgd  *    must display the following acknowledgement:
     15  1.1  cgd  *	This product includes software developed by the University of
     16  1.1  cgd  *	California, Berkeley and its contributors.
     17  1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     18  1.1  cgd  *    may be used to endorse or promote products derived from this software
     19  1.1  cgd  *    without specific prior written permission.
     20  1.1  cgd  *
     21  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  1.1  cgd  * SUCH DAMAGE.
     32  1.1  cgd  */
     33  1.1  cgd 
     34  1.1  cgd #ifndef lint
     35  1.1  cgd static char sccsid[] = "@(#)tstp.c	5.6 (Berkeley) 3/3/91";
     36  1.1  cgd #endif /* not lint */
     37  1.1  cgd 
     38  1.1  cgd # include	<signal.h>
     39  1.1  cgd 
     40  1.1  cgd # include	"curses.ext"
     41  1.1  cgd 
     42  1.1  cgd /*
     43  1.1  cgd  * handle stop and start signals
     44  1.1  cgd  *
     45  1.1  cgd  * @(#)tstp.c	5.6 (Berkeley) 3/3/91
     46  1.1  cgd  */
     47  1.1  cgd void
     48  1.1  cgd tstp() {
     49  1.1  cgd 
     50  1.1  cgd # ifdef SIGTSTP
     51  1.1  cgd 
     52  1.1  cgd 	SGTTY	tty;
     53  1.1  cgd 	int	omask;
     54  1.1  cgd # ifdef DEBUG
     55  1.1  cgd 	if (outf)
     56  1.1  cgd 		fflush(outf);
     57  1.1  cgd # endif
     58  1.1  cgd 	tty = _tty;
     59  1.1  cgd 	mvcur(0, COLS - 1, LINES - 1, 0);
     60  1.1  cgd 	endwin();
     61  1.1  cgd 	fflush(stdout);
     62  1.1  cgd 	/* reset signal handler so kill below stops us */
     63  1.1  cgd 	signal(SIGTSTP, SIG_DFL);
     64  1.1  cgd #define	mask(s)	(1 << ((s)-1))
     65  1.1  cgd 	omask = sigsetmask(sigblock(0) &~ mask(SIGTSTP));
     66  1.1  cgd 	kill(0, SIGTSTP);
     67  1.1  cgd 	sigblock(mask(SIGTSTP));
     68  1.1  cgd 	signal(SIGTSTP, tstp);
     69  1.1  cgd 	_tty = tty;
     70  1.1  cgd 	ioctl(_tty_ch, TIOCSETP, &_tty);
     71  1.1  cgd 	wrefresh(curscr);
     72  1.1  cgd # endif	SIGTSTP
     73  1.1  cgd }
     74