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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 non-standard 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 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



                                  2001-12-15                         FPURGE(3)