FFLUSH (3)
flush a stream
SYNOPSIS
#include <stdio.h>
int fflush(FILE * stream );
DESCRIPTION
The function
fflush
forces a write of all buffered data for the given output or update
stream
via the stream's underlying write function. The open status of the stream
is unaffected.
If the
stream
argument is
NULL ,
fflush
flushes
all
open output streams.
RETURN VALUES
Upon successful completion 0 is returned. Otherwise,
EOF
is returned and the global variable
errno
is set to indicate the error.
ERRORS
EBADF
Stream
is not an open stream, or is not open for writing.
The function
fflush
may also fail and set
errno
for any of the errors specified for the routine
write (2).
SEE ALSO
CONFORMING TO
The
fflush
function conforms to ANSI C3.159-1989 (``ANSI C'').
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