Question

I have a Perl web app and would like to log all uncaught exceptions (uneval’ed die’s). My first thought is to do something like this:

use Carp 'cluck';

sub main {
    my $logfile ="/some/path/logfile.txt";
    open STDERR, ">>$logfile";
    # main logic
    ...
}

sub eval_main {
   eval {
       main;
   };
   if ($@) {
       cluck $@;
       close STDERR;
       # redirect to "friendly error page"
       ....
   }
 }

 eval_main;

Is there a better way than this?

EDIT: Added redirect

Answer 1

Just use a $SIG{__DIE__} handler. See %SIG in perlvar:

$SIG{__DIE__} = sub {
    open LOG, ">>my/error.log";
    print LOG @_;
    close LOG;
    print STDERR @_;
    exit 1;
};

sub main {
    ...
}

main();