debian:/home/string# ps axfu|grep udev
root      1140  0.0  0.0   2716   432 ?        S<s  Mar04   0:00 udevd --daemon
root     31539  0.0  0.1   2728   932 ?        S<   01:04   0:00  \_ udevd --daemon
nobody   31549  0.0  0.1   2300   820 ?        D<   01:04   0:00      \_ /lib/udev/vol_id --export /dev/.tmp-8-0
root     31617  0.0  0.1   2852   700 pts/0    S+   01:06   0:00              \_ grep udev