1 /* $NetBSD: initscr.c,v 1.19 2000/06/15 21:20:16 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)initscr.c 8.2 (Berkeley) 5/4/94"; 40 #else 41 __RCSID("$NetBSD: initscr.c,v 1.19 2000/06/15 21:20:16 jdc Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <signal.h> 46 #include <stdlib.h> 47 48 #include "curses.h" 49 #include "curses_private.h" 50 51 /* Window list */ 52 struct __winlist *__winlistp; 53 54 /* 55 * initscr -- 56 * Initialize the current and standard screen. 57 */ 58 WINDOW * 59 initscr(void) 60 { 61 char *sp; 62 63 #ifdef DEBUG 64 __CTRACE("initscr\n"); 65 #endif 66 __echoit = 1; 67 __pfast = __rawmode = __noqch = 0; 68 __nca = A_NORMAL; 69 70 if (gettmode() == ERR) 71 return (NULL); 72 73 /* 74 * If My_term is set, or can't find a terminal in the environment, 75 * use Def_term. 76 */ 77 if (My_term || (sp = getenv("TERM")) == NULL) 78 sp = (char *)Def_term; 79 if (setterm(sp) == ERR) 80 return (NULL); 81 82 /* Need either homing or cursor motion for refreshes */ 83 if (!HO && !CM) 84 return (NULL); 85 86 __winlistp = NULL; 87 88 if (curscr != NULL) 89 delwin(curscr); 90 if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR) 91 return (NULL); 92 clearok(curscr, 1); 93 94 if (stdscr != NULL) 95 delwin(stdscr); 96 if ((stdscr = newwin(LINES, COLS, 0, 0)) == ERR) { 97 delwin(curscr); 98 return (NULL); 99 } 100 101 if (__virtscr != NULL) 102 delwin(__virtscr); 103 if ((__virtscr = newwin(LINES, COLS, 0, 0)) == ERR) { 104 delwin(curscr); 105 delwin(stdscr); 106 return (NULL); 107 } 108 109 __init_getch(); 110 111 __init_acs(); 112 113 __set_stophandler(); 114 115 #ifdef DEBUG 116 __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS); 117 #endif 118 __startwin(); 119 120 return (stdscr); 121 } 122