readlink(link)
ret: 17
errno: 0
result: ../test/../there!

readlink(file)
ret: -1
errno: 22
result: ../test/../there!

readlink(folder)
ret: -1
errno: 22
result: ../test/../there!

symlink/overwrite
ret: -1
errno: 17

symlink/normal
ret: 0
errno: 0
readlink(created link)
ret: 20
errno: 0
result: new-nonexistent-path

readlink(short buffer)
ret: 3
errno: 0
result: ../-nonexistent-path