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 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * initscr.c
31 *
32 * XCurses Library
33 *
34 * Copyright 1986, 1994 by Mortice Kern Systems Inc. All rights reserved.
35 *
36 */
37
38 #ifdef M_RCSID
39 #ifndef lint
40 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/initscr.c 1.5 1995/09/28 16:47:03 ant Exp $";
41 #endif
42 #endif
43
44 #include <private.h>
45 #include <errno.h>
46 #include <stdlib.h>
47
48 static char nomem_msg[] = m_textstr(
49 3139, "Failed to allocate required memory.\n", "E"
50 );
51 static char noterm_msg[] = m_textstr(
52 202, "Unknown terminal \"%s\".\n", "E term"
53 );
54 static char dumb_msg[] = m_textstr(
55 3140, "Terminal \"%s\" has insufficent capabilities for Curses.\n",
56 "E term"
57 );
58
59 /*f
60 * Initialize XCurses for use with a single terminal. stdin and stdout
61 * are used. If a program needs an indication of error conditions,
62 * so that it can continue to run in a line-oriented mode, use newterm()
63 * instead.
64 */
65 WINDOW *
initscr()66 initscr()
67 {
68 WINDOW *w;
69 SCREEN *sp;
70 int i, n, begy;
71 char *term, *err;
72
73 #ifdef M_CURSES_TRACE
74 __m_trace("initscr(void)");
75 #endif
76
77 errno = 0;
78 sp = newterm((char *) 0, stdout, stdin);
79
80 if (sp == (SCREEN *) 0) {
81 err = errno == ENOMEM ? nomem_msg : noterm_msg;
82 goto error_1;
83 }
84
85 (void) set_term(sp);
86
87 /* We require some form of cursor positioning and the ability to
88 * clear the end of a line. These abilities should be sufficient
89 * to provide minimum full screen support.
90 */
91 if (1 < lines
92 && cursor_address == (char *) 0
93 && row_address == (char *) 0
94 && (cursor_up == (char *) 0 || cursor_down == (char *) 0)
95 && (parm_up_cursor == (char *) 0 || parm_down_cursor == (char *) 0)) {
96 err = dumb_msg;
97 goto error_3;
98 }
99
100 if ((1 < lines && cursor_address == (char *) 0)
101 && column_address == (char *) 0
102 && (cursor_left == (char *) 0 || cursor_right == (char *) 0)
103 && (parm_left_cursor == (char *) 0 || parm_right_cursor == (char *)0)) {
104 err = dumb_msg;
105 goto error_3;
106 }
107
108 if (clr_eol == (char *) 0) {
109 err = dumb_msg;
110 goto error_3;
111 }
112
113 return __m_return_pointer("initscr", stdscr);
114 error_3:
115 (void) delwin(stdscr);
116 error_2:
117 (void) endwin();
118 (void) delscreen(sp);
119 error_1:
120 /* newterm()/setupterm() attempts to load $TERM, else if
121 * $TERM is not defined, the vendor's default terminal type.
122 */
123 if ((term = getenv("TERM")) == (char *) 0)
124 term = M_TERM_NAME;
125
126 (void) fprintf(stderr, m_strmsg(err), term);
127 error_0:
128 exit(1);
129 return (0); /* keep gcc happy */
130 }
131