trying to execute 'at now + 2 minutes...

[mmccaws2]

Hi

On unix I'll run a command at the command line like

at now + 2 minutes
./trial.pl &
Ctrl d

how do I do this from within a script?

Thanks
Mike

 

[Randal L. Schwartz]

mmccaws2> Hi
mmccaws2> On unix I'll run a command at the command line like

mmccaws2> how do I do this from within a script?

open AT, "|at now + 2 minutes" or die $!;
print AT "./trial.pl"; # not sure why you backgrounded that.
close AT;

Or, if you don't really need "at", and you just want to execute something
in two minutes, you can simply fork:

defined(my $kid = fork) or die "Cannot fork: $!";
unless ($kid) { # child does...
sleep 2 * 60; # two minutes, measured in seconds
exec "./trial.pl"; # for example, or just do it in line
exit 0;
}

$kid's pid will show up on a waitpid() call later, so you need to wait for it
eventually or exit soon, or you can double fork and wait if you don't want the
zombie.

print "Just another Perl hacker,"; # the original, #0

 

[sandy_saydakov]

On unix I'll run a command at the command line like


how do I do this from within a script?

Perhaps, sleep($seconds) first would do it for you.

/sandy
http://myperlquiz.com/

 

[xhoster]

Hi

On unix I'll run a command at the command line like


how do I do this from within a script?

open my $at, "| at now + 2 minutes" or die $!;
print $at './trial.pl&';
close $at or die $!;

Or you could do it strictly in Perl using fork and sleep and exec.

Xho

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[mmccaws2]

open my $at, "| at now + 2 minutes" or die $!;
print $at './trial.pl&';
close $at or die $!;

Or you could do it strictly in Perl using fork and sleep and exec.

Xho

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payment of page charges. This article must therefore be hereby marked
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this fact.

Thanks everyone

it works great.

Mike