Pretty-print a
FileMode. The format is similar to the one
ls(1): It is display as three blocks of three characters. The first
block are the permissions of the user, the second one are the ones of
the group and the third one the ones of other subjects. A
r
denotes that the file or directory is readable by the subject, a
w denotes that it is writable and an
x denotes that
it is executable. Unset permissions are represented by
-.