fpurge, __fpurge - purge a stream


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

   int fpurge(FILE *stream);

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

   void  __fpurge(FILE *stream);


   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.


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


   EBADF  stream is not an open stream.


   For   an   explanation   of   the  terms  used  in  this  section,  see

   Interface   Attribute      Value               
   __fpurge()  Thread safety  MT-Safe race:stream 


   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.


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


   fflush(3), setbuf(3), stdio_ext(3)


   This  page  is  part of release 4.09 of the Linux man-pages project.  A
   description of the project, information about reporting bugs,  and  the
   latest     version     of     this    page,    can    be    found    at

                              2015-07-23                         FPURGE(3)


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