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