FindExe returns the list of file paths of all executables under the heads globing pattern.

IsExecAll returns true is the file mode indicates the file is executable by owner, group and other.

IsExecAny returns true is the file mode indicates the file is executable by owner, group or other.

IsExecGroup returns true is the file mode indicates the file is executable by its group.

IsExecOther returns true is the file mode indicates the file is executable by other.

IsExecOwner returns true is the file mode indicates the file is executable by its owner.