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/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid
[] = "@(#)fflush.c 8.1 (Berkeley) 6/4/93";
#endif
static const char rcsid
[] =
"$\Id: fflush.c,v 1.3 1996/06/22 10:33:05 jraynard Exp $";
#endif /* LIBC_SCCS and not lint */
#include <errno.h>
#include <stdio.h>
#include "local.h"
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
#endif
/* Flush a single file, or (if fp is NULL) all files. */
int
fflush(fp
)
register FILE
*fp
;
{
int retval
;
if (fp
== NULL
)
return (_fwalk
(__sflush
));
#ifdef _THREAD_SAFE
_thread_flockfile
(fp
,__FILE__
,__LINE__
);
#endif
if ((fp
->_flags
& (__SWR
| __SRW
)) == 0) {
errno
= EBADF
;
retval
= EOF
;
} else {
retval
= __sflush
(fp
);
}
#ifdef _THREAD_SAFE
_thread_funlockfile
(fp
);
#endif
return (retval
);
}
int
__sflush
(fp
)
register FILE
*fp
;
{
register unsigned char *p
;
register int n
, t
;
t
= fp
->_flags
;
if ((t
& __SWR
) == 0)
return (0);
if ((p
= fp
->_bf._base
) == NULL
)
return (0);
n
= fp
->_p
- p
; /* write this much */
/*
* Set these immediately to avoid problems with longjmp and to allow
* exchange buffering (via setvbuf) in user write function.
*/
fp
->_p
= p
;
fp
->_w
= t
& (__SLBF
|__SNBF
) ? 0 : fp
->_bf._size
;
for (; n
> 0; n
-= t
, p
+= t
) {
t
= (*fp
->_write
)(fp
->_cookie
, (char *)p
, n
);
if (t
<= 0) {
fp
->_flags
|= __SERR
;
return (EOF
);
}
}
return (0);
}