$ signal
The program can be interrupted here with CTRL-C
(sleeping for 5 seconds)
^CSignal 2 recognized!
Entering critical section... CTRL-C is not delivered...
^CYou have pressed CTRL-C in the critical section without the signal beeing delivered to the process yet
Now all signals are delivered.
Signal 2 recognized!
Now CTRL-C is recognized again. Sleeping for 5 seconds.
$