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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 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 3.74 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 http://www.kernel.org/doc/man-pages/.
2001-12-15 FPURGE(3)
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