2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990, 1993 The Regents of the University of California.
5 * Copyright (c) 2013 Mariusz Zaborski <oshogbo@FreeBSD.org>
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #if defined(LIBC_SCCS) && !defined(lint)
37 static char sccsid[] = "@(#)fclose.c 8.1 (Berkeley) 6/4/93";
38 #endif /* LIBC_SCCS and not lint */
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include "namespace.h"
47 #include "un-namespace.h"
49 #include "libc_private.h"
53 cleanfile(FILE *fp, bool c)
57 r = fp->_flags & __SWR ? __sflush(fp) : 0;
59 if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
63 if (fp->_flags & __SMBF)
64 free((char *)fp->_bf._base);
70 fp->_r = fp->_w = 0; /* Mess up if reaccessed. */
73 * Lock the spinlock used to protect __sglue list walk in
74 * __sfp(). The __sfp() uses fp->_flags == 0 test as an
75 * indication of the unused FILE.
77 * Taking the lock prevents possible compiler or processor
78 * reordering of the writes performed before the final _flags
79 * cleanup, making sure that we are done with the FILE before
80 * it is considered available.
83 fp->_flags = 0; /* Release this FILE for reuse. */
84 STDIO_THREAD_UNLOCK();
90 fdclose(FILE *fp, int *fdp)
97 if (fp->_flags == 0) { /* not open! */
102 FLOCKFILE_CANCELSAFE(fp);
104 if (fp->_close != __sclose) {
107 } else if (fp->_file < 0) {
113 (void)cleanfile(fp, true);
118 r = cleanfile(fp, false);
120 FUNLOCKFILE_CANCELSAFE();
130 if (fp->_flags == 0) { /* not open! */
135 FLOCKFILE_CANCELSAFE(fp);
136 r = cleanfile(fp, true);
137 FUNLOCKFILE_CANCELSAFE();