fpurge3
Purge a stream
Usage
/* unsupported */ #include <stdio.h>
int fpurge(FILE *stream);
/* supported */ #include <stdio.h> #include <stdio_ext.h>
void __fpurge(FILE *stream);
Library
Standard C library (libc, -lc)
Overview
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 to indicate the error.
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 |
Notes
Usually it is a mistake to want to discard input buffers.
Releases
17 releases since Debian 1.1 (Buzz); the text changed 14 times.