Prefixes for udevadm Information
Outputs from the udevadm info --query=all command are prefixed to
indicate what the value relates to. Some prefixes are likely to only have a single value,
while others might have several values. For example, the device path is singular in value,
but there might be several symbolic links and device properties. Outputs for the
udevadm info command can be restricted to a specific types of
information by changing the --query=<type>. When the query type is
specific, prefixes aren't returned in output.
Table 2-1 udevadm info output prefixes
| Prefix | Meaning |
|---|---|
| P: | Device path in /sys/ |
| M: | Device name in /sys/ (the last component of "P:")
|
| R: | Device number in /sys/ (the numeric suffix of the last
component of "P:")
|
| U: | Kernel subsystem |
| T: | Kernel device type within subsystem |
| D: | Kernel device node major/minor |
| I: | Network interface index |
| N: | Kernel device node name |
| L: | Device node symbolic link priority |
| S: | Device node symbolic link |
| Q: | Block device sequence number (DISKSEQ) |
| V: | Attached driver |
| E: | Device property |