fpurge, __fpurge - purge a stream
/* unsupported */
int fpurge(FILE *stream);
/* supported */
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
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.
For an explanation of the terms used in this section, see attributes(7).
- stream is not an open 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
Usually it is a mistake to want to discard input buffers.
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