/* fdopen.c - open file. stdio.h *//* Copyright 1992-1993 Wind River Systems, Inc. *//*modification history--------------------01e,05feb99,dgp  document errno values01d,07jul93,jmm  fixed fdopen to validate the fd (spr 2197)01c,05mar93,jdi  documentation cleanup for 5.1.01b,20sep92,smb  documentation additions01a,29jul92,smb  taken from UCB stdio*//*DESCRIPTION * * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE.INCLUDE FILE: sys/types.h, fcntl.h, unistd.h, stdio.h, errno.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "stdio.h"#include "sys/types.h"#include "fcntl.h"#include "unistd.h"#include "errno.h"#include "objLib.h"#include "iosLib.h"#include "private/stdioP.h"/********************************************************************************* fdopen - open a file specified by a file descriptor (POSIX)** This routine opens the file specified by the file descriptor <fd> and* associates a stream with it.* The <mode> argument is used just as in the fopen() function.** INCLUDE FILES: stdio.h ** RETURNS: A pointer to a stream, or a null pointer if an error occurs,* with `errno' set to indicate the error.** ERRNO: EINVAL** SEE ALSO: fopen(), freopen(),* .br* .I "Information Technology - POSIX - Part 1:"* .I "System API [C Language], IEEE Std 1003.1"*/FILE * fdopen    (    int		 fd,	/* file descriptor */    const char * mode	/* mode to open with */    )    {    FAST FILE *	fp;    int		flags;    int 	oflags;    /* validate the file descriptor */    if (iosFdValue (fd) == ERROR)        return (NULL);        if ((flags = __sflags(mode, &oflags)) == 0)	    return (NULL);    /* Make sure the mode the user wants is a subset of the actual mode. */#if FALSE  /*  XXX */    if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0)	return (NULL);    tmp = fdflags & O_ACCMODE;    if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) 	{	errno = EINVAL;	return (NULL);	}#endif    if ((fp = stdioFpCreate()) == NULL)	return (NULL);    fp->_flags = flags;    /*     * If opened for appending, but underlying descriptor does not have     * O_APPEND bit set, assert __SAPP so that __swrite() will lseek to     * end before each write.     */    if ((oflags & O_APPEND) /* XXX && !(fdflags & O_APPEND) */ )	fp->_flags |= __SAPP;    fp->_file = fd;    return (fp);    }