1 1 27.2.4 Conditional Executability 1 -------------------------------- 1 1 There is one more special type of symbolic permission: if you use ‘X’ 1 instead of ‘x’, execute/search permission is affected only if the file 1 is a directory or already had execute permission. 1 1 For example, this mode: 1 1 a+X 1 1 gives all users permission to search directories, or to execute files if 1 anyone could execute them before. 1