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(3).  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 4.4BSD 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
       fflush(3), setbuf(3), stdio_ext(3)

COLOPHON
       This page is part of release 3.25 of the Linux man-pages project.  A description of the project,  and  information  about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



                                                           2001-12-15                                                  FPURGE(3)