3 pwd, pbd \- working directory
10 prints the path name of the working (current) directory.
12 is guaranteed to return the same path that was used to
14 If, however, the name space has changed, or directory names
15 have been changed, this path name may no longer be valid.
23 prints the base name of the working (current) directory.
24 It prints no final newline and is intended for applications
25 such as constructing shell prompts.