Someone

service system/initial/mountvirtfs/init {
    critical;
    script start = {
        if [ -f /etc/mtab ]
        then
            @rm@ /etc/mtab
            @touch@ /etc/mtab
        fi
    };
}

service system/initial/mountvirtfs/* {
    need = system/initial/mountvirtfs/init system/initial/mountvirtfs/proc;
    env_file = /etc/initng/vfstab;
    critical;
    script start = {
        @mkdir@ -p "${mp_$NAME}" && \
            mount -n -t "${fs_$NAME}" none "${mp_$NAME}" -o "${opt_$NAME}"
    };
}

service system/initial/mountvirtfs {
    need = system/initial/mountvirtfs/init system/initial/mountvirtfs/proc system/initial/mountvirtfs/sys system/initial/mountvirtfs/dev;
    script start = {
        @mknod@ /dev/null c 1 3 -m 666 
    };
}