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https://en.wikipedia.org/wiki/Sysfs
sysfs is a pseudo file system provided by the Linux kernel that exports information about various kernel subsystems, hardware devices, and associated device drivers from the kernel's device model to user space through virtual files. In addition to providing information about various devices and kernel subsystems, exported virtual files are also used for their configuration.
https://wiki.st.com/stm32mpu/wiki/Pseudo_filesystem
3 sysfs (/sys) - System filesystem []. Sysfs [4] is a RAM-based filesystem initially based on ramfs.It provides a means to export kernel data structures, their attributes, and the linkages between them, to user space. Sysfs is enabled and ready to be used in all STM32MPU Embedded Software distribution, via the Linux ® kernel configuration CONFIG_SYSFS, set to yes by default.
https://www.ibm.com/support/knowledgecenter/en/SSB23S_1.1.0.14/gtpd1/d1ffs.html
File ownership and accessibility in the file system are controlled by using the POSIX-compliant structures of user ID, group ID, and access permissions associated with each file in the file system.Application programs can interact with the file system through file system C functions.
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Installation_Guide_IBM_S390_eServer_zSeries/s1-s390info-sysfs.html
The Linux 2.6 kernel introduces the sysfs file system. The sysfs file system is described as a union of the proc, devfs, and devpty file systems. The sysfs file system enumerates the devices and busses attached to the system into a file system hierarchy that can be accessed from user space. It is designed to handle the device and driver specific options that have previously resided in /proc ...
https://android.tutorials.how/android-file-system/
The procfs file system has files which showcase the live kernel data. Sometimes this file system also reflects a number of kernel data structures. These number directories are reflective of the process IDs for all the currently running tasks. 4. Sysfs. Usually mounted on the /sys directory. The sysfs file system helps the kernel identify the ...
https://www.ibm.com/support/knowledgecenter/SSB23S_1.1.0.14/gtpo1/cmd_zfilemount.html
The number of i-nodes correlates loosely to the amount of heap storage that this instance of a PROCFS or SYSFS file system allocates at mount time. Roughly, 65 K i …
https://unix.stackexchange.com/questions/4884/what-is-the-difference-between-procfs-and-sysfs
What is the difference between procfs and sysfs? Why are they made as file systems? As I understand it, proc is just something to store the immediate info regarding the processes running in the system.
https://www.kernel.org/doc/html/latest/admin-guide/gpio/sysfs.html
Note that this attribute will not exist if the kernel doesn’t support changing the direction of a GPIO, ... either lseek(2) to the beginning of the sysfs file and read the new value or close the file and re-open it to read the value. ... This helps drivers prevent userspace …
https://stackoverflow.com/questions/27806554/linux-drivers-and-sysfs
Are all drivers in future required to expose interfaces in sysfs? If the answer to the above is true, then would we be really requiring IOCTL calls at all anymore? because all that we would need to do to make a driver do something is to change values in some of the files in sysfs, e.g., To call a ioctl called DO_SOMETHING on driver D1, we would ...
https://www.thegeekdiary.com/understanding-the-proc-file-system/
The proc file system contains a hierarchy of special files that represent the current state of the kernel. It is named after its original purpose, which is an interface to the structures within running processes to support debugging tools. Linux adopted this from Solaris but also added the interface to the kernel. The proc file system has become quite messy over the years so Linux created the ...
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