rm -rf $PWD/../* is allowed while rm -rf ../* and rm -rf $PWD/* warn (rm-rf-working-directory): the same parent directory, spelled through $PWD, is not folded, since the lexical fold of .. reads only targets that begin at the root or the home. ./../* and x/../../* (the parent too) are allowed the same way.

rm -rf $PWD/../* is allowed while rm -rf ../* and rm -rf $PWD/* warn (rm-rf-working-directory): the same parent directory, spelled through $PWD, is not folded, since the lexical fold of .. reads only targets that begin at the root or the home. ./../* and x/../../* (the parent too) are allowed the same way.

Grounds

• pursued: a target reaching the working directory's parent through $PWD or a relative .. warns as ../* does; such a spelling that allows would show it wrong