- // BSD systems (including OS X) -- but if we don't have it neither, we have
- // to fall back to the old way of simply disabling SIGPIPE temporarily, so
- // define a class to do it in a simple way
+ // BSD systems (including OS X) -- but if we don't have it neither (AIX and
+ // old HP-UX do not), we have to fall back to the old way of simply
+ // disabling SIGPIPE temporarily, so define a class to do it in a safe way