Thanks, reading perlipc very much helped me.
Actually I was attempting a connect inside the signal handler and I went blinking because, at some times the HUP signal itself was not passed to the program(means, not reached the signal handler), I read the below URL(after perlipc:signals) and it was helpful,
http://www.madore.org/~david/computers/connect-intr.html
but I am still unsure about using connect inside a signal handler, can anyone guide me.