For the -KILL = -9 signal, no signal handler can be installed, and it cannot be ignored either, see sigaction(2).
That's the main feature of -KILL. Wesley M. wrote on Thu, Jan 19, 2012 at 04:47:04PM +0400: > I want to see a message on console when i send signal like HUP > KILL INT and TERM > > using for example in a script "manageprocess": > > #!/bin/ksh > trap 'echo Kill detected!' 9 > trap 'ctrl-c detected!' 2 > > run > it with sudo sh manageprocess > No message appear > > Therefore if i run > manually this : trap 'ctrl-c detected!' 2 > it works. But trap 'echo Kill > detected!' 9 doesn't work. > Why ? Why i can't use it in a script?
