lib_initscr.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34/*
35**	lib_initscr.c
36**
37**	The routines initscr(), and termname().
38**
39*/
40
41#include <curses.priv.h>
42#include <tic.h>	/* for MAX_ALIAS */
43
44#if HAVE_SYS_TERMIO_H
45#include <sys/termio.h>	/* needed for ISC */
46#endif
47
48MODULE_ID("$Id: lib_initscr.c,v 1.26 1998/12/19 23:10:09 tom Exp $")
49
50WINDOW *initscr(void)
51{
52static	bool initialized = FALSE;
53NCURSES_CONST char *name;
54int value;
55
56	T((T_CALLED("initscr()")));
57	/* Portable applications must not call initscr() more than once */
58	if (!initialized) {
59		initialized = TRUE;
60
61		if ((name = getenv("TERM")) == 0
62		 || *name == '\0')
63			name = "unknown";
64		if (newterm(name, stdout, stdin) == 0) {
65			fprintf(stderr, "Error opening terminal: %s.\n", name);
66			exit(EXIT_FAILURE);
67		}
68
69		/* allow user to set maximum escape delay from the environment */
70		if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
71			ESCDELAY = value;
72		}
73
74		/* def_shell_mode - done in newterm/_nc_setupscreen */
75		def_prog_mode();
76	}
77	returnWin(stdscr);
78}
79