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__fpurge.3

FPURGE

Section: Linux Programmer's Manual (3)
Updated: 2001-12-15
Index Return to Main Contents
 

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 non-standard 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 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

 

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