Regrading Tweaking chmod binary

[Rohit Sehgal]

Hi,

I am a post graduate student at IIT Kanpur. I am currently working to 
build a android system that is capable of changing permissions of any 
file. I am clear with all sort of stuff that i will be doing after 
changing permissions, but currently I am stucked at place, where i want 
to tweak chmod.c file so that it could any file permission. I tried 
reading the code at coreutils git repo, but very much unclear about it.
Can any one help me changing that chmod.c code such a way that if i 
input any file to utility then the permissions are changed accordingly.
Lastly i want to build this system for android's chmod. I request you to 
please help in doing this as it will be a great help to my thesis work. 
Or lead me to a proper path.

Regards,
Rohit Sehgal,
Masters Student IIT Kanpur