Fix a bug where default file used is not shown

When a default file is used but no section is found (ex. below using
"bad_section"), the plugin dies with:

  Invalid section 'bad_section' in config file ''

This patch add a function to Nagios::Plugin::Config that returns the last
used file, and use it to return a file name when we have none.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/Nagios/Plugin/Getopt.pm b/lib/Nagios/Plugin/Getopt.pm
index 6432ee0..f910c4b 100644
--- a/lib/Nagios/Plugin/Getopt.pm
+++ b/lib/Nagios/Plugin/Getopt.pm
@@ -249,6 +249,7 @@ sub _load_config_section
   # TODO: is this check sane? Does --extra-opts=foo require a [foo] section?
   ## Nevertheless, if we die as UNKNOWN here we should do the same on default
   ## file *added eval/_die above*.
+  $file ||= $Config->np_getfile();
   $self->_die("Invalid section '$section' in config file '$file'")
     unless exists $Config->{$section};