fileMode(mo,fn)
i1 : fn = temporaryFileName() o1 = /tmp/M2-500234-0/0
i2 : fn << "hi there" << close o2 = /tmp/M2-500234-0/0 o2 : File
i3 : m = fileMode fn o3 = 420
i4 : fileMode(m|7,fn)
i5 : fileMode fn o5 = 423
i6 : removeFile fn