Programming Perl, 4th Edition

Other Arguments to sigtrap

untrapped

This token suppresses the installation of handlers for subsequently listed signals if they’ve already been trapped or ignored.

any

This token installs handlers for all subsequently listed signals. This is the default behavior.

signal

Any argument that looks like a signal name (that is, one matching the pattern /^[A–Z][A–Z0–9]*$/) requests sigtrap to handle that signal.

number

A numeric argument that requires the version number of the sigtrap pragma to be at least number. This works just like most regular modules that have a $VERSION package variable:

% perl –Msigtrap –le 'print $sigtrap::VERSION'
1.02