xref: /titanic_52/usr/src/lib/libcurses/screen/tstp.c (revision 587644a8567e6a9533f88401daa59cbd78c4632f)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 /*LINTLIBRARY*/
43 
44 #include	<sys/types.h>
45 #include	<stdlib.h>
46 #include	<signal.h>
47 #include	"curses_inc.h"
48 
49 
50 /* handle stop and start signals */
51 
52 #ifdef	SIGTSTP
53 void
54 _tstp(int dummy)
55 {
56 #ifdef	DEBUG
57 	if (outf)
58 		(void) fflush(outf);
59 #endif	/* DEBUG */
60 	curscr->_attrs = A_ATTRIBUTES;
61 	(void) endwin();
62 	(void) fflush(stdout);
63 	(void) kill(0, SIGTSTP);
64 	(void) signal(SIGTSTP, _tstp);
65 	(void) fixterm();
66 	/* changed ehr3 SP->doclear = 1; */
67 	curscr->_clear = TRUE;
68 	(void) wrefresh(curscr);
69 }
70 #endif	/* SIGTSTP */
71 
72 void
73 _ccleanup(int signo)
74 {
75 	(void) signal(signo, SIG_IGN);
76 
77 	/*
78 	 * Fake curses into thinking that all attributes are on so that
79 	 * endwin will turn them off since the < BREAK > key may have
80 	 * interrupted the sequence to turn them off.
81 	 */
82 
83 	curscr->_attrs = A_ATTRIBUTES;
84 	(void) endwin();
85 #ifdef	DEBUG
86 	fprintf(stderr, "signal %d caught. quitting.\n", signo);
87 #endif	/* DEBUG */
88 	if (signo == SIGQUIT)
89 		(void) abort();
90 	else
91 		exit(1);
92 }
93