Tcl/Tk in a Nutshell

Name

signal

signal action siglist [command]

Set the action to take when a Unix signal is received. The siglist parameter lists one or more signal names or numbers. Parameter action indicates the action to take, as described in the following:

default

Take system default action.

ignore

Ignore the signal.

error

Generate a catchable Tcl error.

trap

Execute command indicated by command parameter.

get

Return current settings for the specified signals as a keyed list.

set

Set signals from a keyed list in the format returned by get.

block

Block signals from being received.

unblock

Allow the specified signal to be received.