2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * @(#)fflush.c 8.1 (Berkeley) 6/4/93
37 * $FreeBSD: src/lib/libc/stdio/fflush.c,v 1.7 1999/08/28 00:00:58 peter Exp $
38 * $DragonFly: src/lib/libc/stdio/fflush.c,v 1.6 2005/07/23 20:23:05 joerg Exp $
41 #include "namespace.h"
44 #include "un-namespace.h"
45 #include "libc_private.h"
48 #include "priv_stdio.h"
51 * Flush a single file, or (if fp is NULL) all files.
60 return (_fwalk(__sflush
));
62 if ((fp
->pub
._flags
& (__SWR
| __SRW
)) == 0) {
66 retval
= __sflush(fp
);
73 * Flush a single file, or (if fp is NULL) all files.
82 return (_fwalk(__sflush
));
83 if ((fp
->pub
._flags
& (__SWR
| __SRW
)) == 0) {
87 retval
= __sflush(fp
);
101 if ((p
= fp
->_bf
._base
) == NULL
)
104 n
= fp
->pub
._p
- p
; /* write this much */
107 * Set these immediately to avoid problems with longjmp and to allow
108 * exchange buffering (via setvbuf) in user write function.
111 fp
->pub
._w
= t
& (__SLBF
|__SNBF
) ? 0 : fp
->_bf
._size
;
113 for (; n
> 0; n
-= t
, p
+= t
) {
114 t
= (*fp
->_write
)(fp
->_cookie
, (char *)p
, n
);
116 fp
->pub
._flags
|= __SERR
;