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      1 /*	$NetBSD: fclose.c,v 1.18 2012/03/15 18:22:30 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Chris Torek.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 #if defined(LIBC_SCCS) && !defined(lint)
     37 #if 0
     38 static char sccsid[] = "@(#)fclose.c	8.1 (Berkeley) 6/4/93";
     39 #endif
     40 __RCSID("$NetBSD: fclose.c,v 1.18 2012/03/15 18:22:30 christos Exp $");
     41 #endif /* LIBC_SCCS and not lint */
     42 
     43 #include <assert.h>
     44 #include <errno.h>
     45 #include <stdio.h>
     46 #include <stdlib.h>
     47 #include <wchar.h>
     48 #include "reentrant.h"
     49 #include "local.h"
     50 
     51 int
     52 fclose(FILE *fp)
     53 {
     54 	int r;
     55 
     56 	_DIAGASSERT(fp != NULL);
     57 
     58 	if (fp->_flags == 0) {	/* not open! */
     59 		errno = EBADF;
     60 		return EOF;
     61 	}
     62 	FLOCKFILE(fp);
     63 	WCIO_FREE(fp);
     64 	r = fp->_flags & __SWR ? __sflush(fp) : 0;
     65 	if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
     66 		r = EOF;
     67 	if (fp->_flags & __SMBF)
     68 		free((char *)fp->_bf._base);
     69 	if (HASUB(fp))
     70 		FREEUB(fp);
     71 	FREELB(fp);
     72 	FUNLOCKFILE(fp);
     73 	fp->_file = -1;
     74 	fp->_flags = 0;		/* Release this FILE for reuse. */
     75 	fp->_r = fp->_w = 0;	/* Mess up if reaccessed. */
     76 	return r;
     77 }
     78