HowTo: fixed name for a udev device
http://noctis.de/ramblings/linux/49-howto-fixed-name-for-a-udev-device.html
Linux: how to force a USB device to use the same ttyUSB number [closed]
http://stackoverflow.com/questions/7986034/linux-how-to-force-a-usb-device-to-use-the-same-ttyusb-number
How to distinguish between identical USB-to-serial adapters?
http://askubuntu.com/questions/49910/how-to-distinguish-between-identical-usb-to-serial-adapters
【转】跟我一起写udev规则(译)
http://www.cnitblog.com/luofuchong/archive/2007/12/18/37831.html
Writing Custom udev Rules
http://www.redhat.com/magazine/002dec04/features/udev/
HowTo: fixed name for a udev device
http://noctis.de/ramblings/linux/49-howto-fixed-name-for-a-udev-device.html
Linux: how to force a USB device to use the same ttyUSB number [closed]
http://stackoverflow.com/questions/7986034/linux-how-to-force-a-usb-device-to-use-the-same-ttyusb-number
Linux Kernel（11）- sysfs and device node
http://nano-chicken.blogspot.tw/2010/01/linux-modules11-sysfs-and-device-node.html
http://www.mail-archive.com/[email protected]/msg06774.html
udevadm info -a -n /dev/ttyUSB1 | grep '{serial}'udevd(8) – Linux man page
Name
Synopsis
Description
Options
Detach and run in the background.
–debug-trace
Run all events completely serialized. This may be useful if udev triggers actions or loads kernel modules which cause problems and a slow but continuous operation is needed, where no events are processed in parallel.
–debug
Print debug messages to stderr.
–resolve-names
Specify when udevd should resolve names of users and groups. When set to early (the default) names will be resolved when the rules are parsed. When set to latenames will be resolved for every event. When set to never names will never be resolved and all devices will be owned by root.
–version
Print version number.
–help
Print help text.
Environment
Overrides the syslog priority specified in the config file.
Author
See Also
Referenced By
udevadm(8) – Linux man page
Name
Synopsis
udevadm info options
udevadm trigger [options]
udevadm settle [options]
udevadm control command
udevadm monitor [options]
udevadm test [options] devpath
Description
Options
Print debug messages to stderr.
–version
Print version number.
–help
Print help text.
Queries the udev database for device information stored in the udev database. It can also query the properties of a device from its sysfs representation to help creating udev rules that match this device.–query=type
Query the database for specified type of device data. It needs the –path or –name to identify the specified device. Valid queries are: name, symlink, path, property,all.
–path=devpath
The devpath of the device to query.
–name=file
The name of the device node or a symlink to query
–root
The udev root directory: /dev. If used in conjunction with a name or symlink query, the query returns the absolute path including the root directory.
–attribute-walk
Print all sysfs properties of the specified device that can be used in udev rules to match the specified device. It prints all devices along the chain, up to the root of sysfs that can be used in udev rules.
–device-id-of-file=file
Print major/minor numbers of the underlying device, where the file lives on.
–export-db
Export the content of the udev database.
–version
Print version.
–help
Print help text.
Request device events from the kernel. Usually used to replay events at system coldplug time.–verbose
Print the list of devices which will be triggered.
–dry-run
Do not actually trigger the event.
–type=type
Trigger a specific type of devices. Valid types are: devices, subsystems, failed. The default value is devices.
–action=action
Type of event to be triggered. The default value is add.
–subsystem-match=subsystem
Trigger events for devices which belong to a matching subsystem. This option can be specified multiple times and supports shell style pattern matching.
–subsystem-nomatch=subsystem
Do not trigger events for devices which belong to a matching subsystem. This option can be specified multiple times and supports shell style pattern matching.
–attr-match=attribute=value
Trigger events for devices with a matching sysfs attribute. If a value is specified along with the attribute name, the content of the attribute is matched against the given value using shell style pattern matching. If no value is specified, the existence of the sysfs attribute is checked. This option can be specified multiple times.
–attr-nomatch=attribute=value
Do not trigger events for devices with a matching sysfs attribute. If a value is specified along with the attribute name, the content of the attribute is matched against the given value using shell style pattern matching. If no value is specified, the existence of the sysfs attribute is checked. This option can be specified multiple times.
–property-match=property=value
Trigger events for devices with a matching property value. This option can be specified multiple times and supports shell style pattern matching.
–sysname-match=name
Trigger events for devices with a matching sys device name. This option can be specified multiple times and supports shell style pattern matching.
Watches the udev event queue, and exits if all current events are handled.–timeout=seconds
Maximum number of seconds to wait for the event queue to become empty. The default value is 180 seconds. A value of 0 will check if the queue is empty and always return immediately.
–seq-start=seqnum
Wait only for events after the given sequence number.
–seq-end=seqnum
Wait only for events before the given sequence number.
–exit-if-exists=file
Stop waiting if file exists.
–quiet
Do not print any output, like the remaining queue entries when reaching the timeout.
–help
Print help text.
Modify the internal state of the running udev daemon.–log-priority=value
Set the internal log level of udevd. Valid values are the numerical syslog priorities or their textual representations: err, info and debug.
–stop-exec-queue
Signal udevd to stop executing new events. Incoming events will be queued.
–start-exec-queue
Signal udevd to enable the execution of events.
–reload-rules
Signal udevd to reload the rules files. The udev daemon detects changes automatically, this option is usually not needed. Reloading rules does not apply any changes to already existing devices.
–property=KEY=value
Set a global property for all events.
–max-childs=value
Set the maximum number of events, udevd will handle at the same time.
–help
Print help text.
Listens to the kernel uevents and events sent out by a udev rule and prints the devpath of the event to the console. It can be used to analyze the event timing, by comparing the timestamps of the kernel uevent and the udev event.–kernel
Print the kernel uevents.
–udev
Print the udev event after the rule processing.
–property
Also print the properties of the event.
–help
Print help text.
Simulate a udev event run for the given device, and print debug output.–action=string
The action string.
–subsystem=string
The subsystem string.
–help
Print help text.