view release on metacpan or  search on metacpan

lib/Errno/AnyString.pm  view on Meta::CPAN

Errno::AnyString works by adding two instances of uvar magic to C<$!>, one at the head of the list and one at the tail. It does not modify or remove any existing magic from C<$!>. It should inter-operate cleanly with anything else that adds more magi...

Emptying the C<%Errno::AnyString::Errno2Errstr> hash effectively turns off this module's interference with C<$!>, so you can get a "real" C<$!> value with:

  my $e = do { local %Errno::AnyString::Errno2Errstr ; $! };

=head1 AUTHOR

Dave Taylor, C<< <dave.taylor.cpan at gmail.com> >>

=head1 BUGS AND LIMITATIONS

=head2 C LEVEL STRERROR CALLS

If C level code attempts to get a textual error message based on C<errno> while a custom error string is set, it will get something like the following, depending on the platform:

  Unknown error 458513437

=head2 PURE NUMERIC RESTORE

If the string part of a saved custom_errstr() C<$!> value is lost, then restoring that value to C<$!> restores the string most recently set with custom_errstr(), which is not necessarily the string that was set when the C<$!> value was saved.