read the contents of a symbolic link
i1 : p = temporaryFileName () o1 = /var/folders/p7/xwnp7z5d3gj2rvmpgtm68nnh0000gn/T/M2-65956-0/0
i2 : symlinkFile ("foo", p)
i3 : readlink p o3 = foo
i4 : removeFile p
The object readlink is a compiled function.