Anyone can help me in

Linux( write in C).

Signals, exec.

Write a program that loops forever. Each time the program receive a SIGINT it should perform an ls -l. Each time the program receive a SIGHUP it should perform an ps -a. Note: you cant do an execl in the middle of an interrupt, you will have to set a flag/variable and have the main program do the exec according to which flag/variable is set.