fblocked - Test whether the last input operation exhausted all available input : '''fblocked''' ''channelId'' The '''fblocked''' command returns '''1''' if the most recent input operation on ''channelId'' returned less information than requested because all available input was exhausted. For example, if '''[gets]''' is invoked when there are only three characters available for input and no end-of-line sequence, '''[gets]''' returns an empty string and a subsequent call to '''fblocked''' will return '''1'''. ''ChannelId'' must be an identifier for an open channel such as a Tcl standard channel ('''[stdin]''', '''[stdout]''', or '''[stderr]'''), the return value from an invocation of '''[open]''' or '''[socket]''', or the result of a channel creation command provided by a Tcl extension. http://purl.org/tcl/home/man/tcl8.4/TclCmd/fblocked.htm ---- **See also** * [channel] * [chan] * [eof] * [open] * [socket] <> Tcl syntax help | Arts and Crafts of Tcl-Tk Programming | Command | Channel | Introspection