11-27-2009
Quote:
Originally Posted by
Pouchie1
jlliagre's idea was great! I tried it. It didn't work at first . It gave me an error stating wrong time period for sleep.
That's weird. That syntax simply set a default value (60 seconds) if no second parameter is supplied.
Quote:
But, I am wondering how sure I can be that this kill $! will only kill the snoop process that I am running and not any other process that is running.
It can't by design. $! is the pid of the last background process.
Quote:
I am wondering if it will be safer to to have script return the process ID for the snoop that I am running and then kill that process only.
That would have no advantage.
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KILL(2) System Calls Manual KILL(2)
NAME
kill - send signal to a process
SYNOPSIS
kill(pid, sig);
DESCRIPTION
Kill sends the signal sig to the process specified by the process number in r0. See signal(2) for a list of signals.
The sending and receiving processes must have the same effective user ID, otherwise this call is restricted to the super-user.
If the process number is 0, the signal is sent to all other processes in the sender's process group; see tty(4).
If the process number is -1, and the user is the super-user, the signal is broadcast universally except to processes 0 and 1, the scheduler
and initialization processes, see init(8).
Processes may send signals to themselves.
SEE ALSO
signal(2), kill(1)
DIAGNOSTICS
Zero is returned if the process is killed; -1 is returned if the process does not have the same effective user ID and the user is not
super-user, or if the process does not exist.
ASSEMBLER
(kill = 37.)
(process number in r0)
sys kill; sig
KILL(2)