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[PATCH] update documentation for new config file format
Here is the man page update after my udev-weekend :)
This commit is contained in:
kay.sievers@vrfy.org
Greg KH
parent
79c3cb65f8
commit
4bd46ac7e5
115
udev.8
115
udev.8
@ -5,7 +5,7 @@ udev \- Linux configurable dynamic device naming support
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.BI udev " hotplug-subsystem"
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.br
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.B udev
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.RI "[-q " sysfs_path "] [-rVh]"
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.RI "[-q " query_type " -p " sysfs_path "] [-drVh]"
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.SH "DESCRIPTION"
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.B udev
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creates or removes device node files usually located in the /dev directory.
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@ -21,14 +21,14 @@ On device creation,
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.B udev
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reads the sysfs directory of the given device to collect device attributes
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like label, serial number or bus device number.
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These attributes are treated as a key
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to determine a unique name for device file creation.
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These attributes may used as keys to determine a
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unique name for device file creation.
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.B udev
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maintains a database for devices present on the system.
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.br
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On device removal,
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.B udev
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queries the internal database for the name of the device file to be deleted.
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queries its database for the name of the device file to be deleted.
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.SH "OPTIONS"
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.B udev
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normally is called by
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@ -42,11 +42,21 @@ Print the version information.
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.TP
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.B -r
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Print the the
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.B udev
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root directory.
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.B udev_root
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directory. When used in conjunction with a query for the node name, the
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.B udev_root
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will be prepended.
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.TP
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.BI -q " sysfs_path"
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Query with the sysfs path as argument for the name of the created device node.
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.BI -q " query_type"
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Query the database for specified value of a created device node.
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Valid types are:
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.BR name ", " symlink ", " owner " or " group .
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.TP
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.BI -p " sysfs_path"
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Specify the sysfs path needed for the query.
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.TP
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.B -q
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Dump the whole database.
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.TP
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.B -h
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Print help text.
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@ -115,61 +125,50 @@ value in the
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.I /etc/udev/udev.conf
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file.
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.P
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Every line in the rules file define the mapping between device attributes and
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the device file name. It starts with a keyword defining the method used to
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match, followed by one ore more keys to compare and the filename for the
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device. One ore more optional symlinks targeting the node may be specified.
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Every line in the rules file defines the mapping between device attributes
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and the device file name. One ore more keys are specified to match a rule
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with the current device. If all keys are matching, the rule will be applied
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and the name is used for the device node. One or more optional symlinks
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targeting the node may be specified.
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.br
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If no matching configuration is found, the default kernel device name
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is used.
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If no matching rule is found, the default kernel device name is used.
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.P
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The line format is:
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.sp
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.I method, key,[key,...] name [, symlink]
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.I key,[key,...] name [, symlink]
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.sp
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where valid methods with corresponding keys are:
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where keys are:
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.TP
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.B CALLOUT
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calling external program, that returns a string to match. The
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.B BUS
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key is optional, but if specified, the sysfs device bus must be able to be
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determined by a "device" symlink.
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.br
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.RB "keys: " BUS ", " PROGRAM ", " ID
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Match the bus type of the device.
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(The sysfs device bus must be able to be determined by a "device" symlink.)
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.TP
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.B LABEL
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device label or serial number, like USB serial number, SCSI UUID or
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file system label. Up to 5 different sysfs files can be checked, with
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all of the values being required in order to match the rule. The
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.B BUS
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key is optional, but if specified, the sysfs device bus must be able to be
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detemined by a "device" symlink.
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.br
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.RB "keys: " BUS ", " SYSFS_
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.B KERNEL
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Match the kernel device name.
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.TP
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.B NUMBER
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device number on the bus, like PCI bus id
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.br
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.RB "keys: " BUS ", " ID
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.B ID
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Match the device number on the bus, like PCI bus id.
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.TP
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.B TOPOLOGY
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device position on bus, like physical port of USB device
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.br
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.RB "keys: " BUS ", " PLACE
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.B PLACE
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Match the topological position on bus, like physical port of USB device
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.TP
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.B REPLACE
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string replacement of the kernel device name
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.br
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.RB "key: " KERNEL
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.BI SYSFS_ filename
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Match sysfs device attribute like label, vendor, USB serial number, SCSI UUID
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or file system label. Up to 5 different sysfs files can be checked, with
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all of the values being required in order to match the rule.
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.TP
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.B IGNORE
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tell udev to not care about creation of this device, e.g. because the
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device is already handled by another program
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.br
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.RB "key: " KERNEL
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.P
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The methods are applied in the following order:
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.BR IGNORE ", " CALLOUT ", " LABEL ", " NUMBER ", " TOPOLOGY ", " REPLACE "."
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.B PROGRAM
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Call external program. This key is valid if the program returns successful.
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The string returned by the program may additionally matched with the
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.B RESULT
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key.
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.TP
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.B RESULT
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Match the returned string of the last
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.B PROGRAM
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call. This key may used in any following rule after a
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.B PROGRAM
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call.
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.P
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.RB "The " NAME " ," SYMLINK " and " PROGRAM
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fields support simple printf-like string substitution:
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@ -203,25 +202,25 @@ If this is not a partition, it will result in 'disc'.
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.sp
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.nf
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# if /sbin/scsi_id returns "OEM 0815" device will be called disk1
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CALLOUT, BUS="scsi", PROGRAM="/sbin/scsi_id", ID="OEM 0815", NAME="disk1"
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BUS="scsi", PROGRAM="/sbin/scsi_id", RESULT="OEM 0815", NAME="disk1"
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# USB printer to be called lp_color
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LABEL, BUS="usb", SYSFS_serial="W09090207101241330", NAME="lp_color"
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BUS="usb", SYSFS_serial="W09090207101241330", NAME="lp_color"
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# SCSI disk with a specific vendor and model number is to be called boot
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LABEL, BUS="scsi", SYSFS_vendor="IBM", SYSFS_model="ST336", NAME="boot%n"
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BUS="scsi", SYSFS_vendor="IBM", SYSFS_model="ST336", NAME="boot%n"
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# sound card with PCI bus id 00:0b.0 to be called dsp
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NUMBER, BUS="pci", ID="00:0b.0", NAME="dsp"
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BUS="pci", ID="00:0b.0", NAME="dsp"
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# USB mouse at third port of the second hub to be called mouse1
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TOPOLOGY, BUS="usb", PLACE="2.3", NAME="mouse1"
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BUS="usb", PLACE="2.3", NAME="mouse1"
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# ttyUSB1 should always be called pda with two additional symlinks
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REPLACE, KERNEL="ttyUSB1", NAME="pda", SYMLINK="palmtop handheld"
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KERNEL="ttyUSB1", NAME="pda", SYMLINK="palmtop handheld"
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# multiple USB webcams with symlinks to be called webcam0, webcam1, ...
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LABEL, BUS="usb", SYSFS_model="XV3", NAME="video%n", SYMLINK="webcam%n"
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BUS="usb", SYSFS_model="XV3", NAME="video%n", SYMLINK="webcam%n"
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.fi
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.P
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Permissions and ownership for the created device files may specified at
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