/bin/pwd

[Doug Gwyn]

In article <2488 at idunno.Princeton.EDU> pfalstad at phoenix.Princeton.EDU (Paul John Falstad) writes:
>Can anyone tell me how /bin/pwd works?  I thought it was a trivial
>program until I tried to write my own without getcwd(3).  getcwd is not
>a system call, so it must be possible.  The way I think it works is
>quite complicated, so I thought there would be an easier way.

No, on most systems there is no easier way than the obvious one of
seeing where a succession of ".."s gets you.