umask [-pS] [
Display or set file creation mask. If mask begins with a digit, it is treated as an octal number; otherwise it is treated as a symbolic mask. The file creation mask determines which permission bits are turned off (e.g., umask 002 produces rw-rw-r--). The mask is similar to that accepted by the chmod command.
Output is in a form that can be reread later by the shell.
Print the current mask using symbolic notation.