151 lines
3.6 KiB
HTML
151 lines
3.6 KiB
HTML
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<HTML><HEAD><TITLE>Man page of FPURGE</TITLE>
|
|
</HEAD><BODY>
|
|
<H1>FPURGE</H1>
|
|
Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
|
|
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
|
|
|
|
<A NAME="lbAB"> </A>
|
|
<H2>NAME</H2>
|
|
|
|
fpurge, __fpurge - purge a stream
|
|
<A NAME="lbAC"> </A>
|
|
<H2>SYNOPSIS</H2>
|
|
|
|
<PRE>
|
|
/* unsupported */
|
|
<B>#include <<A HREF="file:///usr/include/stdio.h">stdio.h</A>></B>
|
|
|
|
<B>int fpurge(FILE *</B><I>stream</I><B>);</B>
|
|
|
|
/* supported */
|
|
<B>#include <<A HREF="file:///usr/include/stdio.h">stdio.h</A>></B>
|
|
<B>#include <<A HREF="file:///usr/include/stdio_ext.h">stdio_ext.h</A>></B>
|
|
|
|
<B>void __fpurge(FILE *</B><I>stream</I><B>);</B>
|
|
</PRE>
|
|
|
|
<A NAME="lbAD"> </A>
|
|
<H2>DESCRIPTION</H2>
|
|
|
|
The function
|
|
<B>fpurge</B>()
|
|
|
|
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
|
|
<B><A HREF="/cgi-bin/man/man2html?3+getc">getc</A></B>(3);
|
|
|
|
this includes any text pushed back via
|
|
<B><A HREF="/cgi-bin/man/man2html?3+ungetc">ungetc</A></B>(3).
|
|
|
|
See also
|
|
<B><A HREF="/cgi-bin/man/man2html?3+fflush">fflush</A></B>(3).
|
|
|
|
<P>
|
|
|
|
The function
|
|
<B>__fpurge</B>()
|
|
|
|
does precisely the same, but without returning a value.
|
|
<A NAME="lbAE"> </A>
|
|
<H2>RETURN VALUE</H2>
|
|
|
|
Upon successful completion
|
|
<B>fpurge</B>()
|
|
|
|
returns 0.
|
|
On error, it returns -1 and sets
|
|
<I>errno</I>
|
|
|
|
appropriately.
|
|
<A NAME="lbAF"> </A>
|
|
<H2>ERRORS</H2>
|
|
|
|
<DL COMPACT>
|
|
<DT id="1"><B>EBADF</B>
|
|
|
|
<DD>
|
|
<I>stream</I>
|
|
|
|
is not an open stream.
|
|
</DL>
|
|
<A NAME="lbAG"> </A>
|
|
<H2>ATTRIBUTES</H2>
|
|
|
|
For an explanation of the terms used in this section, see
|
|
<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
|
|
|
|
<TABLE BORDER>
|
|
<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>__fpurge</B>()
|
|
|
|
</TD><TD>Thread safety</TD><TD>MT-Safe race:stream<BR></TD></TR>
|
|
</TABLE>
|
|
|
|
<P>
|
|
<A NAME="lbAH"> </A>
|
|
<H2>CONFORMING TO</H2>
|
|
|
|
These functions are nonstandard and not portable.
|
|
The function
|
|
<B>fpurge</B>()
|
|
|
|
was introduced in 4.4BSD and is not available under Linux.
|
|
The function
|
|
<B>__fpurge</B>()
|
|
|
|
was introduced in Solaris, and is present in glibc 2.1.95 and later.
|
|
<A NAME="lbAI"> </A>
|
|
<H2>NOTES</H2>
|
|
|
|
Usually it is a mistake to want to discard input buffers.
|
|
<A NAME="lbAJ"> </A>
|
|
<H2>SEE ALSO</H2>
|
|
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?3+fflush">fflush</A></B>(3),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?3+setbuf">setbuf</A></B>(3),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?3+stdio_ext">stdio_ext</A></B>(3)
|
|
|
|
<A NAME="lbAK"> </A>
|
|
<H2>COLOPHON</H2>
|
|
|
|
This page is part of release 5.05 of the Linux
|
|
<I>man-pages</I>
|
|
|
|
project.
|
|
A description of the project,
|
|
information about reporting bugs,
|
|
and the latest version of this page,
|
|
can be found at
|
|
<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
|
|
<P>
|
|
|
|
<HR>
|
|
<A NAME="index"> </A><H2>Index</H2>
|
|
<DL>
|
|
<DT id="2"><A HREF="#lbAB">NAME</A><DD>
|
|
<DT id="3"><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT id="4"><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT id="5"><A HREF="#lbAE">RETURN VALUE</A><DD>
|
|
<DT id="6"><A HREF="#lbAF">ERRORS</A><DD>
|
|
<DT id="7"><A HREF="#lbAG">ATTRIBUTES</A><DD>
|
|
<DT id="8"><A HREF="#lbAH">CONFORMING TO</A><DD>
|
|
<DT id="9"><A HREF="#lbAI">NOTES</A><DD>
|
|
<DT id="10"><A HREF="#lbAJ">SEE ALSO</A><DD>
|
|
<DT id="11"><A HREF="#lbAK">COLOPHON</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="/cgi-bin/man/man2html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 00:05:43 GMT, March 31, 2021
|
|
</BODY>
|
|
</HTML>
|