usr/src/ucblib/libucb/port/stdio/printf.c

   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 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 /*LINTLIBRARY*/
  34
  35 #include <sys/types.h>
  36 #include "file64.h"
  37 #include <stdio.h>
  38 #include <stdarg.h>
  39 #include "libc.h"
  40
  41 int
  42 printf(const char *format, ...)
  43 {
  44         int count;
  45         va_list ap;
  46
  47         va_start(ap, format);
  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((char *) format, ap, stdout);
  59         va_end(ap);
  60         return (count);
  61 }