fpurge, __fpurge - purge a stream

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────┬───────────────┬─────────────────────┐
       │ Interface                                                       │ Attribute     │ Value               │
       ├─────────────────────────────────────────────────────────────────┼───────────────┼─────────────────────┤
       │ __fpurge()                                                      │ Thread safety │ MT-Safe race: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.

EBADFstream is not an open stream.

fpurge()
              4.4BSD.  Not available under Linux.

       __fpurge()
              Solaris, glibc 2.1.95.

       Standard C library (libc, -lc)

       fpurge, __fpurge - purge a stream

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

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

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

Linux man-pages 6.9.1                              2024-05-02                                          fpurge(3)

       None.

       /* unsupported */
       #include<stdio.h>intfpurge(FILE*stream);

       /* supported */
       #include<stdio.h>#include<stdio_ext.h>void__fpurge(FILE*stream);