cleanname - clean a path name

       For each file name argument, cleanname, by lexical processing only, prints the shortest equivalent string
       that  names  the  same (possibly hypothetical) file.  It eliminates multiple and trailing slashes, and it
       lexically interprets .  and ..  directory components in the name.  If the -d option is present,  unrooted
       names are prefixed with pwd/ before processing.

       cleanname - clean a path name

cleanname(3).

                                                                                               CLEANNAME(1plan9)

/src/cmd/cleanname.c

cleanname [ -dpwd ] names...