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
40static 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
48static char nomem_msg[] = m_textstr(
49	3139, "Failed to allocate required memory.\n", "E"
50);
51static char noterm_msg[] = m_textstr(
52	202, "Unknown terminal \"%s\".\n", "E term"
53);
54static 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 */
65WINDOW *
66initscr()
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);
114error_3:
115	(void) delwin(stdscr);
116error_2:
117	(void) endwin();
118	(void) delscreen(sp);
119error_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);
127error_0:
128	exit(1);
129	return (0);	/* keep gcc happy */
130}
131