fdfopen.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)fdfopen.c	1.2	(ULTRIX)	7/10/85";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1985 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/************************************************************************
 *			Modification History
 *
 *	David L Ballenger, 10-Jul-1985
 * 001	Call the real fdopen().
 *
 ************************************************************************/

/*
	Interfaces with /lib/libS.a
	First arg is file descriptor, second is read/write mode (0/1).
	Returns file pointer on success,
	NULL on failure (no file structures available).
*/

# include	<stdio.h>
# include	<sys/types.h>
# include	<macros.h>

FILE *
fdfopen(fd, mode)
register int fd, mode;
{
	register FILE *iop;

	if (fstat(fd, &Statbuf) < 0)
		return(NULL);
	return(fdopen(fd,((mode) ? "w" : "r")));
}