/*- * Copyright (c) 1990, 1993 *	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. */ #if defined(LIBC_SCCS) && !defined(lint)static char rcsid[] = "$OpenBSD: stdio.c,v 1.3 1997/11/09 23:40:41 flipk Exp $";#endif /* LIBC_SCCS and not lint */ #include <fcntl.h>#include <unistd.h>#include <stdio.h>#include "local.h" /* * Small standard I/O/seek/close functions. * These maintain the `known seek offset' for seek optimisation. */int__sread(cookie, buf, n)	void *cookie;	char *buf;	int n;{	register FILE *fp = cookie;	register int ret;		ret = read(fp->_file, buf, n);	/* if the read succeeded, update the current offset */	if (ret >= 0)		fp->_offset += ret;	else		fp->_flags &= ~__SOFF;	/* paranoia */	return (ret);} int__swrite(cookie, buf, n)	void *cookie;	char const *buf;	int n;{	register FILE *fp = cookie; 	if (fp->_flags & __SAPP)		(void) lseek(fp->_file, (off_t)0, SEEK_END);	fp->_flags &= ~__SOFF;	/* in case FAPPEND mode is set */	return (write(fp->_file, buf, n));} fpos_t__sseek(cookie, offset, whence)	void *cookie;	fpos_t offset;	int whence;{	register FILE *fp = cookie;	register off_t ret;		ret = lseek(fp->_file, (off_t)offset, whence);	if (ret == (off_t)-1)		fp->_flags &= ~__SOFF;	else {		fp->_flags |= __SOFF;		fp->_offset = ret;	}	return (ret);} int__sclose(cookie)	void *cookie;{ 	return (close(((FILE *)cookie)->_file));}