Issue
I am trying to extract the minor device number from the tty_nr attribute in /proc/pid/stat. According to the documentation it is said that, minor device number is a combination 0-7 and 20-30 bits in tty_nr. How can I extract these bits from the tty_nr number?
Solution
There are macros already defined for this purpose. Use the MAJOR() and MINOR() macros that are defined in linux/kdev_t.h.
Answered By – z242
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