need help about add new features

[Yunfan Jiang]

hi, i am trying to add a feature for bash's builtin cmd "cd"  , and i
met some problems
1,  currently i just find the opt parsing block, and i got know how to
add a new option, but i think if i want to public this, its not all
things, some others things like useage need to be change and auto-fix
,but i dont know how to, is there any documents for me about this?
2,  i want to know is it a micro or func when i meet a symbols like
lptend, ctags seems not recongnize micro,anyway its just the documents
things
3,  i want to know in the builtin libraries, is there any func which
can get the dirname from inode value?

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