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Subject Author Date
How to monitor keyboard inactivity from script mmccaws2 04-02-2008
Posted by mmccaws2 on April 2, 2008, 12:11 pm
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 I have a user interface script that makes changes in a db or makes db
queries. I don't want the user to just leave the script running all
the time. what is the best way to monitor if the script has had no
actiivty for 20 minutes?

Thanks

Mike

Posted by jjcassidy on April 2, 2008, 12:22 pm
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> I have a user interface script that makes changes in a db or makes db
> queries. =A0I don't want the user to just leave the script running all
> the time. =A0what is the best way to monitor if the script has had no
> actiivty for 20 minutes?
>
> Thanks
>
> Mike

You'd need to use *some kind* of persistence. Cheapest NIX-ish way is
to have a dummy file that you "touch" when you exit the program--or
whenever a significant event occurs, if you occasionally "sleep". If
you "stat" the file, you know how long it's been since it's been
"touch-ed".

Other than that, it's your choice of persistence: write and read time
to and from a file; use Storable or YAML to dump a hash with all the
values you care about; use a database....

Posted by mmccaws2 on April 2, 2008, 3:07 pm
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On Apr 2, 9:22 am, jjcass...@gmail.com wrote:
>
> > I have a user interface script that makes changes in a db or makes db
> > queries. I don't want the user to just leave the script running all
> > the time. what is the best way to monitor if the script has had no
> > actiivty for 20 minutes?
>
> > Thanks
>
> > Mike
>
> You'd need to use *some kind* of persistence. Cheapest NIX-ish way is
> to have a dummy file that you "touch" when you exit the program--or
> whenever a significant event occurs, if you occasionally "sleep". If
> you "stat" the file, you know how long it's been since it's been
> "touch-ed".
>
> Other than that, it's your choice of persistence: write and read time
> to and from a file; use Storable or YAML to dump a hash with all the
> values you care about; use a database....

so everytime enter is hit log it and have the same script check that
or a different script monitor it? I'm not familiar with storable or
yaml, what keyword search would I use to help narrow down the choices?

Thanks

Mike

Posted by mmccaws2 on April 2, 2008, 3:12 pm
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> On Apr 2, 9:22 am, jjcass...@gmail.com wrote:
>
>
>
>
> > > I have a user interface script that makes changes in a db or makes db
> > > queries. I don't want the user to just leave the script running all
> > > the time. what is the best way to monitor if the script has had no
> > > actiivty for 20 minutes?
>
> > > Thanks
>
> > > Mike
>
> > You'd need to use *some kind* of persistence. Cheapest NIX-ish way is
> > to have a dummy file that you "touch" when you exit the program--or
> > whenever a significant event occurs, if you occasionally "sleep". If
> > you "stat" the file, you know how long it's been since it's been
> > "touch-ed".
>
> > Other than that, it's your choice of persistence: write and read time
> > to and from a file; use Storable or YAML to dump a hash with all the
> > values you care about; use a database....
>
> so everytime enter is hit log it and have the same script check that
> or a different script monitor it? I'm not familiar with storable or
> yaml, what keyword search would I use to help narrow down the choices?
>
> Thanks
>
> Mike

Mark

our posts crossed, I'll try that

Mike

Posted by Mark on April 2, 2008, 2:59 pm
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> I have a user interface script that makes changes in a db or makes db
> queries. =A0I don't want the user to just leave the script running all
> the time. =A0what is the best way to monitor if the script has had no
> actiivty for 20 minutes?
>
> Thanks
>
> Mike

Perhaps this sample code (works on my Linux box but doesn't work on my
Windows XP box) may help:

use strict ;
use warnings ;

$| =3D 1 ;
my $timeout =3D 20 * 60 ; # twenty minutes

my $rin =3D '' ;
vec($rin,fileno(STDIN),1) =3D 1;
my $ein =3D $rin ;

while () {
print "waiting for input\n" ;
my $nfound =3D select(my $rout=3D$rin, undef, my $eout=3D$ein,$timeout);=

if (vec($eout,fileno(STDIN),1)) {
die "error detected on STDIN" ;
}
elsif (vec($rout,fileno(STDIN),1)) {
my $ans =3D <STDIN> ;
print "got: $ans\n" ;
}
else {
print "timed out\n" ;
}
}

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