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 /*LINTLIBRARY*/
41
42 #include <stdlib.h>
43 #include <signal.h>
44 #include <sys/types.h>
45 #include "curses_inc.h"
46
47 /*
48 * This routine initializes the current and standard screen,
49 * and sets up the terminal. In case of error, initscr aborts.
50 * If you want an error status returned, call
51 * scp = newscreen(getenv("TERM"), 0, 0, 0, stdout, stdin);
52 */
53
54 WINDOW *
initscr(void)55 initscr(void)
56 {
57 #ifdef SIGPOLL
58 void (*savsignal)(int);
59 extern void _ccleanup(int);
60 #else /* SIGPOLL */
61 int (*savsignal)();
62 extern int _ccleanup(int);
63 #endif /* SIGPOLL */
64
65 #ifdef SIGTSTP
66 extern void _tstp(int);
67 #endif /* SIGTSTP */
68
69 static char i_called_before = FALSE;
70
71 /* Free structures we are about to throw away so we can reuse the memory. */
72
73 if (i_called_before && SP) {
74 delscreen(SP);
75 SP = NULL;
76 }
77 if (newscreen(NULL, 0, 0, 0, stdout, stdin) == NULL) {
78 (void) reset_shell_mode();
79 if (term_errno != -1)
80 termerr();
81 else
82 curserr();
83 exit(1);
84 }
85
86 #ifdef DEBUG
87 if (outf)
88 fprintf(outf, "initscr: term = %s\n", SP);
89 #endif /* DEBUG */
90 i_called_before = TRUE;
91
92 #ifdef SIGTSTP
93 /*LINTED*/
94 if ((savsignal = signal(SIGTSTP, SIG_IGN)) == SIG_DFL)
95 (void) signal(SIGTSTP, _tstp);
96 else
97 (void) signal(SIGTSTP, savsignal);
98 #endif /* SIGTSTP */
99 /*LINTED*/
100 if ((savsignal = signal(SIGINT, SIG_IGN)) == SIG_DFL)
101 (void) signal(SIGINT, _ccleanup);
102 else
103 (void) signal(SIGINT, savsignal);
104
105 /*LINTED*/
106 if ((savsignal = signal(SIGQUIT, SIG_IGN)) == SIG_DFL)
107 (void) signal(SIGQUIT, _ccleanup);
108 else
109 (void) signal(SIGQUIT, savsignal);
110
111 return (stdscr);
112 }
113