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post_install() { for _g in stapusr stapsys stapdev; do getent group $_g >/dev/null || groupadd -r $_g done chgrp stapusr usr/bin/staprun chmod 04110 usr/bin/staprun } post_upgrade() { post_install $1 } pre_remove() { userdel -rf archsocks for _g in stapusr stapsys stapdev; do groupdel $_g done }