/etc/default/su

This file contains values for the following parameters affecting the use of the su(1M) command:

SULOG

The pathname of a file in which you can log all attempts to execute su.

CONSOLE

If a user executes su to become a privileged user on a device other than device, a message appears on device to inform the administrator of that fact.

PATH

When a user executes su to become an unprivileged user, the user's path is set to path_list. The default is /usr/bin:/usr/ccs/bin.

SUPATH

When a user executes su to become a privileged user, the user's path is set to path_list. The default is /sbin:/usr/sbin:/usr/bin:/etc:/usr/ccs/bin.

PROMPT

If this parameter exists and is set to No, the su command does not prompt for a password (even if one is defined for the login_name). The invoking user, however, must still have appropriate privilege to execute su successfully. If this parameter does not exist or is set to anything other than No (including NULL), su prompts for a password when invoked and validates the password (if one is defined for login_name).