make sure we really don't have a tty when installing rules.  This prevents a flush command from asking a question (you can't see): If there is no tty associated with the process, this is implied.
make sure we really don't have a tty when installing rules.  This prevents
a flush command from asking a question (you can't see):
If there is no tty associated with the process, this is implied.

MFC after: 1 day

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase