DOKK / manpages / debian 13 / tcl9.0-doc / fblocked.3tcl.en
fblocked(3tcl) Tcl Built-In Commands fblocked(3tcl)

fblocked - Test whether the last input operation exhausted all available input

fblocked channel

The fblocked command has been superceded by the chan blocked command which supports the same syntax and options.

chan(3tcl)

7.5 Tcl