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post_install() { if [ -z "$(getent group sqlgrey)" ]; then groupadd -g 111 sqlgrey fi if [ -z "$(getent passwd sqlgrey)" ]; then useradd -u 111 -g sqlgrey -c "SQLgrey Daemon" -d /var/lib/sqlgrey -m -s /bin/false sqlgrey fi } post_upgrade() { post_install $1 } pre_remove() { userdel sqlgrey &> /dev/null groupdel sqlgrey &> /dev/null } op=$1 shift $op $*