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fclose.c revision 1.4 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Chris Torek.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #if defined(LIBC_SCCS) && !defined(lint)
     38 /*static char *sccsid = "from: @(#)fclose.c	5.2 (Berkeley) 2/1/91";*/
     39 static char *rcsid = "$Id: fclose.c,v 1.4 1993/12/31 19:13:47 jtc Exp $";
     40 #endif /* LIBC_SCCS and not lint */
     41 
     42 #include <errno.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include "local.h"
     46 
     47 int
     48 fclose(fp)
     49 	register FILE *fp;
     50 {
     51 	register int r;
     52 
     53 	if (fp->_flags == 0) {	/* not open! */
     54 		errno = EBADF;
     55 		return (EOF);
     56 	}
     57 	r = fp->_flags & __SWR ? __sflush(fp) : 0;
     58 	if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
     59 		r = EOF;
     60 	if (fp->_flags & __SMBF)
     61 		free((char *)fp->_bf._base);
     62 	if (HASUB(fp))
     63 		FREEUB(fp);
     64 	if (HASLB(fp))
     65 		FREELB(fp);
     66 	fp->_flags = 0;		/* release this FILE for reuse */
     67 	return (r);
     68 }
     69