src/system/libroot/posix/stdio/fclose.c

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  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 rcsid[] = "$OpenBSD: fclose.c,v 1.2 1996/08/19 08:32:19 tholo Exp $";
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include <errno.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44
  45 #include <errno_private.h>
  46
  47 #include "local.h"
  48
  49 int
  50 fclose(fp)
  51         register FILE *fp;
  52 {
  53         register int r;
  54
  55         if (fp->_flags == 0) {  /* not open! */
  56                 __set_errno(EBADF);
  57                 return (EOF);
  58         }
  59         r = fp->_flags & __SWR ? __sflush(fp) : 0;
  60         if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
  61                 r = EOF;
  62         if (fp->_flags & __SMBF)
  63                 free((char *)fp->_bf._base);
  64         if (HASUB(fp))
  65                 FREEUB(fp);
  66         if (HASLB(fp))
  67                 FREELB(fp);
  68         fp->_flags = 0;         /* Release this FILE for reuse. */
  69         fp->_r = fp->_w = 0;    /* Mess up if reaccessed. */
  70         return (r);
  71 }