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 1986 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.5 */ 31 32 /*LINTLIBRARY*/ 33 #include <stdio.h> 34 #include <varargs.h> 35 36 extern int _doprnt(); 37 38 /*VARARGS1*/ 39 int 40 printf(format, va_alist) 41 char *format; 42 va_dcl 43 { 44 register int count; 45 va_list ap; 46 47 va_start(ap); 48 if (!(stdout->_flag & _IOWRT)) { 49 /* if no write flag */ 50 if (stdout->_flag & _IORW) { 51 /* if ok, cause read-write */ 52 stdout->_flag |= _IOWRT; 53 } else { 54 /* else error */ 55 return EOF; 56 } 57 } 58 count = _doprnt(format, ap, stdout); 59 va_end(ap); 60 return(ferror(stdout)? EOF: count); 61 } 62