fpurge, __fpurge - purge a stream
/* unsupported */
#include <stdio.h>
int fpurge(FILE *stream);
/* supported */
#include <stdio.h>
#include <stdio_ext.h>
void __fpurge(FILE *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.
Upon successful completion
fpurge() returns 0. On error, it returns -1
and sets
errno appropriately.
- EBADF
- stream is not an open stream.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| __fpurge () |
Thread safety |
MT-Safe race:stream |
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.
Usually it is a mistake to want to discard input buffers.
fflush(3),
setbuf(3),
stdio_ext(3)