fpurge

(3)

purge a stream

Library functionsmanpages-dev 6.9.1-1also documents __fpurge

/* 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)

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 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

STANDARDS

None.

HISTORY

fpurge(): 4.4BSD. Not available under Linux.
__fpurge(): Solaris, glibc 2.1.95.

NOTES

Usually it is a mistake to want to discard input buffers.