stdio/FreeBSD/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  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 static char sccsid[] = "@(#)fclose.c    8.1 (Berkeley) 6/4/93";
  35 #endif /* LIBC_SCCS and not lint */
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD: src/lib/libc/stdio/fclose.c,v 1.12 2007/01/09 00:28:06 imp Exp $");
  38
  39 #include "namespace.h"
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include "un-namespace.h"
  44 #include "libc_private.h"
  45 #include "local.h"
  46
  47 int
  48 fclose(FILE *fp)
  49 {
  50         int r;
  51
  52         pthread_once(&__sdidinit, __sinit);
  53
  54         if (fp == NULL) {
  55                 errno = EFAULT;
  56                 return (EOF);
  57         }
  58         if (fp->_flags == 0) {  /* not open! */
  59                 errno = EBADF;
  60                 return (EOF);
  61         }
  62         FLOCKFILE(fp);
  63         r = fp->_flags & __SWR ? __sflush(fp) : 0;
  64         if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
  65                 r = EOF;
  66         if (fp->_flags & __SMBF)
  67                 free((char *)fp->_bf._base);
  68         if (HASUB(fp))
  69                 FREEUB(fp);
  70         if (HASLB(fp))
  71                 FREELB(fp);
  72         fp->_file = -1;
  73         fp->_r = fp->_w = 0;    /* Mess up if reaccessed. */
  74         FUNLOCKFILE(fp);
  75         __sfprelease(fp);       /* Release this FILE for reuse. */
  76         return (r);
  77 }