Shell Programming and Scripting

Hi,

I have command that should run continuously for 30 mins but not every day not once in a week , not one in a month. whenever i call that particular program that command should run for 30 mins and stop.

Code:

  
#Contents of test.pl

`ls -l *.txt`;

#some other lines of code to print

When ever i call test.pl the ls -l command (For example) should run continuously for 30 mins and stop.

How can i do this in perl?

Can crontab be used if so we need to give day month and year etc but i might run this program daily or i may not run for 0ne year etc, One month or even not even daily i run.

Any suggestions?


Regards

Wanna DOS your server???

Code:

my $secs = print time();
my $targetsecs = $secs + (30 * 60);

while ($secs < $targetsecs) {
system("ls -l *.txt");
$secs = print time();
}

However, I would use at least a 1sec sleep.

Code:

my $secs = print time();
my $targetsecs = $secs + (30 * 60);

while ($secs < $targetsecs) {
system("ls -l *.txt");
sleep 1s;
$secs = print time();
}