1 .\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>.
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .TH FPURGE 3 2001-12-15 "" "Linux Programmer's Manual"
25 fpurge, __fpurge \- purge a stream
31 .BI "int fpurge(FILE *" stream );
36 .B #include <stdio_ext.h>
38 .BI "void __fpurge(FILE *" stream );
43 clears the buffers of the given stream.
44 For output streams this discards any unwritten output.
45 For input streams this discards any input read from the underlying object
46 but not yet obtained via
48 this includes any text pushed back via \fIungetc\fP(). See also
53 does precisely the same, but without returning a value.
55 Upon successful completion
58 On error, it returns \-1 and sets
65 is not an open stream.
67 These functions are nonstandard and not portable.
70 was introduced in BSD 4.4 and is not available under Linux.
73 was introduced in Solaris, and is present in glibc 2.1.95 and later.
75 Usually it is a mistake to want to discard input buffers.