In a recent posting, it was suggested that using a $SIG{__WARN__} or $SIG{__DIE__} handler is a great way to add a timestamp to a normal death/warning message. I'd already written code to do that for one of my recent Linux Magazine columns, so here it is.

Each die or warn will be preceded by the timestamp and the process ID on each line of the output.

$SIG{__WARN__} = sub {
  my $message = shift;
  my $prefix = "[$$] [".localtime()."] ";
  $message =~ s/^/$prefix/gm;
  warn $message;
};

$SIG{__DIE__} = sub {
  my $message = shift;
  my $prefix = "[$$] [".localtime()."] ";
  $message =~ s/^/$prefix/gm;
  die $message;
};

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In reply to Timestamping your warns and dies by merlyn

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