[EMAIL PROTECTED] wrote:
> If you dont understand my question then I assume you do not know unix
> or tail -f ?
You're right, those are both new to me.
> I want to after a sleep of 5-8 seconds, send a kill
> signal to the previous command then increment the counter. thank
> you!
Sorry, I think I understand the question now. If you want to run something
like tail -f that never exits and then kill it after a while, you'll need
the PID number. So you can't run it via system() or backticks, since those
don't return until the subprocess exits.
Something along these lines should work inside your loop:
my $pid = open(PIPE, "tail -f /etc/passwd |") or die $!;
local $SIG{ALRM} = sub { kill 'TERM', $pid };
alarm 5;
print while(<PIPE>);
alarm 0;
close PIPE;
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