Shell Script get CTRL+Z with Trap

Question

I am trying to get the SIGSTOP CTRL+Z signal in my script\'s trap.

When my script is executing, if I temporarily suspend

Answer 1

There are two signals you can't trap*, SIGKILL and SIGSTOP. Use another signal.

^{*: without modifying the kernel}

IEEE standard:

Setting a trap for SIGKILL or SIGSTOP produces undefined results.