echo rm $session_file | at now + 1 minute

should work. This has nothing to do with how perl executes it, but everything with how the shell does it - if you type the contents of the system call in the shell you get the same behaviour.

You could also open a pipe, and write to it: 

open my $at, '|-', 'at', qw(now + 1 minute)
   or die "can't open pipe to 'at': $!";
print $at "rm $session_file";
close $at or die $!;

[download]

Or you could use CGI::Session which handles session timeouts for you in a transparent way.

Perl 6 - links to (nearly) everything that is Perl 6.

In reply to Re: executing "at" from perl by moritz
in thread executing "at" from perl by rastoboy

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