October 2017
Intermediate to advanced
354 pages
9h 28m
English
Content preview from Mastering Linux Kernel Development
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Sysfs
Sysfs is another pseudo filesystem that is introduced to export unified hardware and driver information to user mode. It enumerates information about devices and associated device drivers from the kernel's device model perspective to user space through virtual files. Sysfs is mounted to the /sys directory (mount point) of the rootfs. Similar to procfs, underlying drivers and kernel subsystems can be configured for power management and other functionalities through virtual file interfaces of sysfs. Sysfs also enables hotplug event management by Linux distros through appropriate daemons such as udev, which is configured to listen and respond to hotplug events.
Following is a brief description of important subdirectories of sysfs:
- Devices ...
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