kc3-lang/libbsd/man/fpurge.3bsd

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• man/fpurge.3bsd

• .\"	$OpenBSD: fflush.3,v 1.12 2015/11/04 21:30:13 tedu Exp $
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  .Dd $Mdocdate: November 4 2015 $
  .Dt fpurge 3bsd
  .Os
  .Sh NAME
  .Nm fpurge
  .Nd flush a stream
  .Sh LIBRARY
  .ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
  .ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
  .Lb libbsd
  .Sh SYNOPSIS
  .In stdio.h
  (See
  .Xr libbsd 7
  for include usage.)
  .Ft int
  .Fn fpurge "FILE *stream"
  .Sh DESCRIPTION
  The function
  .Fn fpurge
  erases any input or output buffered in the given
  .Fa stream .
  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
  .Xr getc 3 ;
  this includes any text pushed back via
  .Xr ungetc 3 .
  .Sh RETURN VALUES
  Upon successful completion 0 is returned.
  Otherwise,
  .Dv EOF
  is returned and the global variable
  .Va errno
  is set to indicate the error.
  .Sh ERRORS
  .Bl -tag -width Er
  .It Bq Er EBADF
  .Fa stream
  is not an open stream.
  .El
  .Sh SEE ALSO
  .Xr fclose 3 ,
  .Xr fopen 3 ,
  .Xr setvbuf 3
  .Sh HISTORY
  The
  .Fn fpurge
  function first appeared in
  .Bx 4.4 Lite .
  

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