udevadm使用

/lib/udev # udevadm info  --query=all --path=/block/sda 
P: /devices/platform/host0/target0:0:3/0:0:3:0/block/sda 
N: sda 
S: block/8:0 
S: disk/by-path/scsi-0:0:3:0 
E: UDEV_LOG=3 
E: DEVPATH=/devices/platform/host0/target0:0:3/0:0:3:0/block/sda 
E: MAJOR=8 
E: MINOR=0 
E: DEVNAME=/dev/sda 
E: DEVTYPE=disk 
E: ID_VENDOR=Seagate 
E: ID_VENDOR_ENC=Seagate\x20 
E: ID_MODEL=ST32000542AS 
E: ID_MODEL_ENC=ST32000542AS\x20\x20\x20\x20 
E: ID_REVISION=CC34 
E: ID_TYPE=disk 
E: ID_BUS=scsi 
E: ID_PATH=scsi-0:0:3:0 
E: /dev/sdb4: LABEL=RESOURCE" UUID="31657086-11c0-b30a-e562-b0ab7c7242e8 
E: /dev/sdb3: LABEL=DATABASE_USE" UUID="4c5b5a85-7e53-09fc-d07a-800e744633f3 
E: /dev/sdb2: LABEL=SYSTEM" UUID="f8783d4c-75a7-fb72-2673-44d48be252d3 
E: /dev/sdb1: LABEL=ROOT" UUID="288fc41b-a11d-6a75-f348-cee02b740b1c 
E: /dev/sda4: LABEL=RESOURCE" UUID="1516-1567 
E: /dev/sda3: LABEL=DATABASE_USE" UUID="836b92b5-e7bf-42e5-8fd9-0d221961d9f2 
E: /dev/sda2: LABEL=SYSTEM_USE" UUID="5355d48f-c717-4ae5-b1d9-8891b1afb69b 
E: /dev/sda1: LABEL=ROOT" UUID="56dc4020-35e3-43f3-9b36-94e51844caf1 
E: DEVLINKS=/dev/block/8:0 /dev/disk/by-path/scsi-0:0:3:0

 

udevadm info  --query=all --name=/dev/sda 输出结果和上面一样

udevadm info  --export-db  | less 查看udev database，输出所有节点信息

udevadm test /block/sda

 

/lib/udev # ./scsi_id --export --whitelisted -d /dev/sda 
ID_VENDOR=Seagate 
ID_VENDOR_ENC=Seagate\x20 
ID_MODEL=ST32000542AS 
ID_MODEL_ENC=ST32000542AS\x20\x20\x20\x20 
ID_REVISION=CC34 
ID_TYPE=disk

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命令用法：

Usage: udevadm test OPTIONS <syspath> 
--action= set action string 
--help

 

Usage: udevadm info OPTIONS 
--query= query device information: 
name name of device node 
symlink pointing to node 
path sys device path 
env the device related imported environment 
all all values 
--path=<syspath> sys device path used for query or attribute walk 
--name= node or symlink name used for query or attribute walk 
--root prepend dev directory to path names 
--attribute-walk print all key matches while walking along the chain 
of parent devices 
--device-id-of-file= print major:minor of device containing this file 
--export-db export the content of the udev database 
--help