systemd/etc/udev/debian/devfs.rules

# There are a number of modifiers that are allowed to be used in some
# of the different fields. They provide the following subsitutions:
#
# %n the "kernel number" of the device.
#    For example, 'sda3' has a "kernel number" of '3'
# %e the smallest number for that name which does not matches an existing node
# %k the kernel name for the device
# %M the kernel major number for the device
# %m the kernel minor number for the device
# %b the bus id for the device
# %c the string returned by the PROGRAM
# %s{filename} the content of a sysfs attribute
# %% the '%' char itself
#

# workaround for devices which do not report media changes
BUS=="ide", KERNEL=="hd[a-z]", SYSFS{removable}=="1", \
	ENV{ID_MODEL}=="IOMEGA_ZIP*",	NAME="%k", OPTIONS+="all_partitions"

# IDE devices
BUS=="ide", KERNEL=="hd[a-z]*", PROGRAM="ide-devfs.sh %k %b %n", \
					NAME="%c{1}", SYMLINK+="%k %c{2}"

# SCSI devices
BUS=="scsi", PROGRAM="scsi-devfs.sh %k %b %n", \
					NAME="%c{1}", SYMLINK+="%k %c{2}"

# RAID controllers
KERNEL=="cciss!*|ida!*|rd!*", PROGRAM="raid-devfs.sh %k", \
					NAME="%c{1}", SYMLINK+="%k"

# other block devices
KERNEL=="md[0-9]*",			NAME="md/%n",
KERNEL=="loop[0-9]*",			NAME="loop/%n"
KERNEL=="ram[0-9]*",			NAME="rd/%n"

# USB devices
BUS=="usb", KERNEL=="auer[0-9]*",	NAME="usb/%k"
BUS=="usb", KERNEL=="cpad[0-9]*",	NAME="usb/%k"
BUS=="usb", KERNEL=="dabusb*",		NAME="usb/%k"
BUS=="usb", KERNEL=="hiddev*",		NAME="usb/%k"
BUS=="usb", KERNEL=="legousbtower*",	NAME="usb/%k"
BUS=="usb", KERNEL=="lp[0-9]*",		NAME="usb/%k"
BUS=="usb", KERNEL=="ttyUSB*", \
	SYSFS{product}=="Palm Handheld*|Handspring Visor", \
					SYMLINK+="pilot"

# usbfs-like devices
SUBSYSTEM=="usb_device",	PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", \
				NAME="%c"

# serial devices
KERNEL=="ttyS[0-9]*",		NAME="tts/%n"
KERNEL=="ttyUSB[0-9]*",		NAME="tts/USB%n"
KERNEL=="rfcomm[0-9]*",		NAME="bluetooth/rfcomm/%n",
KERNEL=="capi",			NAME="capi20", SYMLINK+="isdn/capi20"
KERNEL=="capi[0-9]*",		NAME="capi/%n"

# vc devices
KERNEL=="tty[0-9]*",		NAME="vc/%n"
KERNEL=="vcs",			NAME="vcc/0"
KERNEL=="vcs[0-9]*",		NAME="vcc/%n"
KERNEL=="vcsa",			NAME="vcc/a0"
KERNEL=="vcsa[0-9]*",		NAME="vcc/a%n"

# video devices
KERNEL=="video[0-9]*",		NAME="v4l/%k"
KERNEL=="radio[0-9]*",		NAME="v4l/%k"
KERNEL=="vbi[0-9]*",		NAME="v4l/%k"
KERNEL=="vtx[0-9]*",		NAME="v4l/%k"
KERNEL=="dvb*",			PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s $${K%%%%.*} $${K#*.}", \
				NAME="%c"
KERNEL=="fb[0-9]*",		NAME="fb/%n"
KERNEL=="card[0-9]*",		NAME="dri/%k"

# misc devices
KERNEL=="apm_bios",		NAME="misc/%k",
KERNEL=="agpgart",		NAME="misc/%k"
KERNEL=="hw_random",		NAME="hwrng"
KERNEL=="nvram",		NAME="misc/%k"
KERNEL=="psaux",		NAME="misc/%k"
KERNEL=="rtc",			NAME="misc/%k"
KERNEL=="tun",			NAME="net/%k"

# printers and parallel devices
KERNEL=="lp[0-9]*",		NAME="printers/%n"
KERNEL=="parport[0-9]*",	NAME="parports/%n"

KERNEL=="i2c-[0-9]*",		NAME="i2c/%n"
KERNEL=="fd[0-9]*",		NAME="floppy/%n"

KERNEL=="cdemu[0-9]*",		NAME="cdemu/%n"
KERNEL=="pktcdvd[0-9]*",	NAME="pktcdvd/%n"
KERNEL=="pktcdvd",		NAME="pktcdvd/control"

KERNEL=="cpu[0-9]*",		NAME="cpu/%n/cpuid"
KERNEL=="msr[0-9]*",		NAME="cpu/%n/msr"
KERNEL=="microcode",		NAME="cpu/microcode"

KERNEL=="umad*",		NAME="infiniband/%k"
KERNEL=="issm*",		NAME="infiniband/%k"
KERNEL=="uverbs*",		NAME="infiniband/%k"
KERNEL=="ucm*",			NAME="infiniband/%k"

# sound devices
KERNEL=="controlC[0-9]*",	NAME="snd/%k"
KERNEL=="hwC[D0-9]*",		NAME="snd/%k"
KERNEL=="pcmC[D0-9cp]*",	NAME="snd/%k"
KERNEL=="midiC[D0-9]*",		NAME="snd/%k"
KERNEL=="timer",		NAME="snd/%k"
KERNEL=="seq",			NAME="snd/%k"
KERNEL=="audio*",		NAME="sound/%k"
KERNEL=="dsp*",			NAME="sound/%k"
KERNEL=="adsp*",		NAME="sound/%k"
KERNEL=="midi*",		NAME="sound/%k"
KERNEL=="mixer*",		NAME="sound/%k"
KERNEL=="sequencer*",		NAME="sound/%k"
KERNEL=="amidi*",		NAME="sound/%k"
KERNEL=="dmmidi*",		NAME="sound/%k"
KERNEL=="admmidi*",		NAME="sound/%k"

# ieee1394 devices       
KERNEL=="dv1394*",		NAME="dv1394/%n"
KERNEL=="video1394*",		NAME="video1394/%n"

# input devices
KERNEL=="mice",			NAME="input/%k"
KERNEL=="mouse[0-9]*",		NAME="input/%k"
KERNEL=="event[0-9]*",		NAME="input/%k"
KERNEL=="js[0-9]*",		NAME="input/%k"
KERNEL=="ts[0-9]*",		NAME="input/%k"
KERNEL=="uinput",		NAME="input/%k"

# Zaptel
KERNEL=="zapctl",		NAME="zap/ctl"
KERNEL=="zaptimer",		NAME="zap/timer"
KERNEL=="zapchannel",		NAME="zap/channel"
KERNEL=="zappseudo",		NAME="zap/pseudo"
KERNEL=="zap[0-9]*",		NAME="zap/%n"

# AOE character devices
SUBSYSTEM=="aoe", KERNEL=="discover",	NAME="etherd/%k"
SUBSYSTEM=="aoe", KERNEL=="err",	NAME="etherd/%k"
SUBSYSTEM=="aoe", KERNEL=="interfaces",	NAME="etherd/%k"
SUBSYSTEM=="aoe", KERNEL=="revalidate",	NAME="etherd/%k"

# device mapper creates its own device nodes, so ignore these
KERNEL=="dm-[0-9]*",		NAME=""
KERNEL=="device-mapper",	NAME="mapper/control"