FFLUSH(3) BSD Programmer's Manual FFLUSH(3)
f
\bff
\bfl
\blu
\bus
\bsh
\bh, f
\bfp
\bpu
\bur
\brg
\bge
\be - flush a stream
S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
#
\b#i
\bin
\bnc
\bcl
\blu
\bud
\bde
\be <
\b<s
\bst
\btd
\bdi
\bio
\bo.
\b.h
\bh>
\b>
f
\bff
\bfl
\blu
\bus
\bsh
\bh(_
\bF_
\bI_
\bL_
\bE _
\b*_
\bs_
\bt_
\br_
\be_
\ba_
\bm);
f
\bfp
\bpu
\bur
\brg
\bge
\be(_
\bF_
\bI_
\bL_
\bE _
\b*_
\bs_
\bt_
\br_
\be_
\ba_
\bm);
D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
The function f
\bff
\bfl
\blu
\bus
\bsh
\bh() forces a write of all buffered data for the given
output or update _
\bs_
\bt_
\br_
\be_
\ba_
\bm via the stream's underlying write function. The
open status of the stream is unaffected.
If the _
\bs_
\bt_
\br_
\be_
\ba_
\bm argument is NULL, f
\bff
\bfl
\blu
\bus
\bsh
\bh() flushes _
\ba_
\bl_
\bl open output streams.
The function f
\bfp
\bpu
\bur
\brg
\bge
\be() erases any input or output buffered in the given
_
\bs_
\bt_
\br_
\be_
\ba_
\bm. For output streams this discards any unwritten output. For input
streams this discards any input read from the underlying object but not
yet obtained via getc(3); this includes any text pushed back via ungetc.
R
\bRE
\bET
\bTU
\bUR
\bRN
\bN V
\bVA
\bAL
\bLU
\bUE
\bES
\bS
Upon successful completion 0 is returned. Otherwise, EOF is returned and
the global variable _
\be_
\br_
\br_
\bn_
\bo is set to indicate the error.
[EBADF] _
\bS_
\bt_
\br_
\be_
\ba_
\bm is not an open stream, or, in the case of f
\bff
\bfl
\blu
\bus
\bsh
\bh(), not a
The function f
\bff
\bfl
\blu
\bus
\bsh
\bh() may also fail and set _
\be_
\br_
\br_
\bn_
\bo for any of the errors
specified for the routine write(2).
S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
write(2), fopen(3), fclose(3), setbuf(3)
S
\bST
\bTA
\bAN
\bND
\bDA
\bAR
\bRD
\bDS
\bS
The f
\bff
\bfl
\blu
\bus
\bsh
\bh() function conforms to ANSI C X3.159-1989 (``ANSI C '').
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