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FFLUSH
!!!FFLUSH
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
NOTES
CONFORMING TO
SEE ALSO
----
!!NAME


fflush - flush a stream
!!SYNOPSIS


__#include __


__int fflush(FILE *__''stream''__);__
!!DESCRIPTION


The function __fflush__ forces a write of all user-space
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 VALUE


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).
!!NOTES


Note that __fflush__() only flushes the user space
buffers provided by the C library. To ensure that the data
is physically stored on disk the kernel buffers must be
flushed too, e.g. with sync(2) or
fsync(2).
!!CONFORMING TO


The __fflush__ function conforms to ANSI X3.159-1989
(``ANSI C'').
!!SEE ALSO


write(2), fclose(3), fopen(3),
fsync(2), sync(2), write(2),
setbuf(3)
----

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Last edited on Tuesday, June 4, 2002 12:24:18 am by "perry"

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