fpurge, __fpurge: vyčistit proud

Originální popis anglicky: fpurge, __fpurge - purge a stream

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

/* unsupported */
#include <stdio.h>
 
int fpurge(FILE *stream);
 
/* supported */
#include <stdio.h>
 
#include <stdio_ext.h>
 
void  __fpurge(FILE *stream);

POPIS / INSTRUKCE

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(). See also fflush(3). The function __fpurge() does precisely the same, but without returning a value.

NÁVRATOVÁ HODNOTA

Upon successful completion fpurge() returns 0. On error, it returns -1 and sets errno appropriately.

CHYBY / ERRORY

EBADF

stream is not an open stream.

ODPOVÍDAJÍCÍ

These functions are nonstandard and not portable. The function fpurge() was introduced in BSD 4.4 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.

SOUVISEJÍCÍ

fclean(3), fflush(3), setbuf(3), stdio_ext(3)