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 <stdlib.h>
45 #include <signal.h>
46 #include <sys/types.h>
47 #include "curses_inc.h"
48
49 /*
50 * This routine initializes the current and standard screen,
51 * and sets up the terminal. In case of error, initscr aborts.
52 * If you want an error status returned, call
53 * scp = newscreen(getenv("TERM"), 0, 0, 0, stdout, stdin);
54 */
55
56 WINDOW *
initscr(void)57 initscr(void)
58 {
59 #ifdef SIGPOLL
60 void (*savsignal)(int);
61 extern void _ccleanup(int);
62 #else /* SIGPOLL */
63 int (*savsignal)();
64 extern int _ccleanup(int);
65 #endif /* SIGPOLL */
66
67 #ifdef SIGTSTP
68 extern void _tstp(int);
69 #endif /* SIGTSTP */
70
71 static char i_called_before = FALSE;
72
73 /* Free structures we are about to throw away so we can reuse the memory. */
74
75 if (i_called_before && SP) {
76 delscreen(SP);
77 SP = NULL;
78 }
79 if (newscreen(NULL, 0, 0, 0, stdout, stdin) == NULL) {
80 (void) reset_shell_mode();
81 if (term_errno != -1)
82 termerr();
83 else
84 curserr();
85 exit(1);
86 }
87
88 #ifdef DEBUG
89 if (outf)
90 fprintf(outf, "initscr: term = %s\n", SP);
91 #endif /* DEBUG */
92 i_called_before = TRUE;
93
94 #ifdef SIGTSTP
95 /*LINTED*/
96 if ((savsignal = signal(SIGTSTP, SIG_IGN)) == SIG_DFL)
97 (void) signal(SIGTSTP, _tstp);
98 else
99 (void) signal(SIGTSTP, savsignal);
100 #endif /* SIGTSTP */
101 /*LINTED*/
102 if ((savsignal = signal(SIGINT, SIG_IGN)) == SIG_DFL)
103 (void) signal(SIGINT, _ccleanup);
104 else
105 (void) signal(SIGINT, savsignal);
106
107 /*LINTED*/
108 if ((savsignal = signal(SIGQUIT, SIG_IGN)) == SIG_DFL)
109 (void) signal(SIGQUIT, _ccleanup);
110 else
111 (void) signal(SIGQUIT, savsignal);
112
113 return (stdscr);
114 }
115