NAME

       fpurge, __fpurge - purge a stream

LIBRARY

       Standard C library (libc, -lc)

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 to indicate the
       error.

ERRORS

       EBADF  stream is not an open stream.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────────────────────────────────────────────────┬───────────────┬─────────────────────┐
       │Interface                                                         │ Attribute     │ Value               │
       ├──────────────────────────────────────────────────────────────────┼───────────────┼─────────────────────┤
       │__fpurge()                                                        │ Thread safety │ MT-Safe race:stream │
       └──────────────────────────────────────────────────────────────────┴───────────────┴─────────────────────┘

STANDARDS

       None.

HISTORY

       fpurge()
              4.4BSD.  Not available under Linux.

       __fpurge()
              Solaris, glibc 2.1.95.

NOTES

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

SEE ALSO

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