PERL Beginners - KILL INT can not wake up $SIG{INT}

Author

KILL INT can not wake up $SIG{INT}

Kelvin Wu

2004-12-20, 3:55 am

Hi list,

Anyone has such experience? KILL INT pid cannot wake up $SIG{INT} sub{}.

my code is like;

$SIG{INT} = sub {#load pm}

$SIG{ALRM} = sub {print "Driver $pm is going to sleep... bye.\n"; exit;};

the pm actually has a system call to execute something
sub xxx {
`perl xxx.pl`
}

but

my $tmp = kill "INT", $pid; ## it returns number of processes, eg: 1
cannot wake up the $SIG{INT} at all after $SIG{ALRM} has been executed.

does system call cause the problem?

Thanks.

mgoland@optonline.net

2004-12-20, 8:56 pm

----- Original Message -----
From: Kelvin Wu <kelvin.wu@gmail.com>
Date: Monday, December 20, 2004 0:36 am
Subject: KILL INT can not wake up $SIG{INT}

> Hi list,
Hello

>
> Anyone has such experience? KILL INT pid cannot wake up $SIG{INT}
> sub{}.
Only on Window's, but then again I don't think signals are a native implementation in WinPerl.

> my code is like;
>
> $SIG{INT} = sub {#load pm}
>
> $SIG{ALRM} = sub {print "Driver $pm is going to sleep... bye.\n";
> exit;};
> the pm actually has a system call to execute something
> sub xxx {
> `perl xxx.pl`
> }
>
> but
>
> my $tmp = kill "INT", $pid; ## it returns number of processes, eg: 1
> cannot wake up the $SIG{INT} at all after $SIG{ALRM} has been
> executed.
Well sure, in example you have provided your entire program will exit after SIGALRM.

> does system call cause the problem?
It shouldn't. Post more of your code if you need more help.

HTH,
mark G.

>
> Thanks.
>
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