<HTML><HEAD><TITLE>Tcl Built-In Commands - fblocked manual page</TITLE></HEAD><BODY> <H3><A NAME="M2">NAME</A></H3> fblocked - Test whether the last input operation exhausted all available input <H3><A NAME="M3">SYNOPSIS</A></H3> <B>fblocked </B><I>channelId</I><BR> <H3><A NAME="M4">DESCRIPTION</A></H3> The <B>fblocked</B> command returns 1 if the most recent input operation on <I>channelId</I> returned less information than requested because all available input was exhausted. For example, if <B><A HREF="../TkCmd/gets.htm">gets</A></B> is invoked when there are only three characters available for input and no end-of-line sequence, <B><A HREF="../TkCmd/gets.htm">gets</A></B> returns an empty string and a subsequent call to <B>fblocked</B> will return 1. <P> <H3><A NAME="M5">SEE ALSO</A></H3> <B><A HREF="../TkCmd/gets.htm">gets</A></B>, <B><A HREF="../TkCmd/open.htm">open</A></B>, <B><A HREF="../TkCmd/read.htm">read</A></B> <H3><A NAME="M6">KEYWORDS</A></H3> <A href="../Keywords/B.htm#blocking">blocking</A>, <A href="../Keywords/N.htm#nonblocking">nonblocking</A> <HR><PRE> <A HREF="../copyright.htm">Copyright</A> © 1996 Sun Microsystems, Inc. <A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE> </BODY></HTML>