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 out-
put 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.
ATTRIBUTES
For an explanation of the terms used in this section, see at-
tributes(7).
+-----------+---------------+---------------------+
|Interface | Attribute | Value |
+-----------+---------------+---------------------+
|__fpurge() | Thread safety | MT-Safe race: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 5.07 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
https://www.kernel.org/doc/man-pages/.
2017-09-15 FPURGE(3)