Look up the sysfs attribute with name on this.
This function does blocking I/O, and updates the sysfs attributes cache.
Before version 238 the uncached getters would not strip trailing newlines.
| this |
A Device. |
| name |
Name of the sysfs attribute. |
|
The value of the sysfs attribute or null if there is no such attribute. Do not free this string, it is owned by this. |