rather using this or other c library want implement own chmod in c change file permission code solely learn happens in back-end when change file permission. appreciated.
... want implement own chmod in c ... learn happens in back-end ...
the c library encapsulates system dependent parts of these functions.
if want know going on inside c-library , beyond, need how particular system calling kernel - linux x86, example int 0x80 instruction. see example https://en.wikipedia.org/wiki/system_call started.
to learn how each of c functions working internally, suggest fetch gnu c library sources , study them: see http://sourceware.org/git/?p=glibc.git
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