was built on by asking the importable C<pw_has> function about them.
This function returns true if all parameters are supported fields
on the build platform, false if one or more were not, and raises
-and exception if you asked about a field that Perl never knows how
+an exception if you asked about a field that Perl never knows how
to provide. Parameters may be in a space-separated string, or as
separate arguments. If you pass no parameters, the function returns
the list of C<struct pwd> fields supported by your build platform's