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 * 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