1 /* 2 * Copyright (c) 1981, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /* from: static char sccsid[] = "@(#)initscr.c 8.1 (Berkeley) 6/4/93"; */ 36 static char *rcsid = "$Id: initscr.c,v 1.5 1993/11/09 04:07:54 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <curses.h> 40 #include <signal.h> 41 #include <stdlib.h> 42 43 /* 44 * initscr -- 45 * Initialize the current and standard screen. 46 */ 47 WINDOW * 48 initscr() 49 { 50 register char *sp; 51 52 #ifdef DEBUG 53 __CTRACE("initscr\n"); 54 #endif 55 __echoit = 1; 56 __pfast = __rawmode = __noqch = 0; 57 58 if (gettmode() == ERR) 59 return (NULL); 60 61 /* 62 * If My_term is set, or can't find a terminal in the environment, 63 * use Def_term. 64 */ 65 if (My_term || (sp = getenv("TERM")) == NULL) 66 sp = Def_term; 67 if (setterm(sp) == ERR) 68 return (NULL); 69 70 /* Need either homing or cursor motion for refreshes */ 71 if (!HO && !CM) 72 return (NULL); 73 74 if (curscr != NULL) 75 delwin(curscr); 76 if ((curscr = newwin(LINES, COLS, 0, 0)) == ERR) 77 return (NULL); 78 clearok(curscr, 1); 79 80 if (stdscr != NULL) 81 delwin(stdscr); 82 if ((stdscr = newwin(LINES, COLS, 0, 0)) == ERR) { 83 delwin(curscr); 84 return (NULL); 85 } 86 87 __set_stophandler(); 88 89 #ifdef DEBUG 90 __CTRACE("initscr: LINES = %d, COLS = %d\n", LINES, COLS); 91 #endif 92 __startwin(); 93 94 return (stdscr); 95 } 96