__fpurge

FPURGE(3)		  Linux Programmer’s Manual		    FPURGE(3)



NAME
       fpurge, __fpurge - purge a stream

SYNOPSIS
       /* unsupported */
       #include <stdio.h>

       int fpurge(FILE *stream);

       /* supported */
       #include <stdio.h>
       #include <stdio_ext.h>

       void  __fpurge(FILE *stream);

DESCRIPTION
       The  function  fpurge()	clears	the buffers of the given 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 getc(3); this includes any text pushed back via ungetc().
       See also fflush(3).

       The function __fpurge() does precisely the same, but without returning
       a value.

RETURN VALUE
       Upon successful completion fpurge() returns 0.  On error,  it  returns
       -1 and sets errno appropriately.

ERRORS
       EBADF  stream is not an open stream.

CONFORMING TO
       These  functions	 are  nonstandard  and	not  portable.	 The function
       fpurge() was introduced in BSD 4.4 and is not available	under  Linux.
       The  function  __fpurge() was introduced in Solaris, and is present in
       glibc 2.1.95 and later.

NOTES
       Usually it is a mistake to want to discard input buffers.

SEE ALSO
       fclean(3), fflush(3), setbuf(3), stdio_ext(3)



				  2001-12-15			    FPURGE(3)