- dir-rel-mkdir: mkdir /a, chdir /a, mkdir b, chdir b, create /a/b/c, open c
- dir-rel-open: mkdir /a, mkdir /a/b, create /a/b/c, chdir /a, open b/c
- dir-rel-rmdir: mkdir a, mkdir /a/b, chdir a, rmdir b
- dir-rel-remove: mkdir a, create /a/b, chdir a, remove b
- dir-abs-mkdir: mkdir /a, chdir /a, mkdir /b, create /b/c, chdir /b, open c