[23david]

OpenRC is interesting. Also compare with a runit example of managing sendmail from the runit-for-lfs project:

    #!/bin/sh
    sv check slapd postgresql mysql >/dev/null || exit 0
    exec /usr/sbin/sendmail -bs -bd -q5m start

https://github.com/inthecloud247/runit-for-lfs/blob/master/b...