FPURGE
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
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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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(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 4.13 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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- Running on 
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