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PAM_ROOTOK(8)                  Linux-PAM Manual                  PAM_ROOTOK(8)
NAME
       pam_rootok - Gain only root access
SYNOPSIS
       pam_rootok.so [debug]
DESCRIPTION
       pam_rootok is a PAM module that authenticates the user if their UID is
       0. Applications that are created setuid-root generally retain the UID
       of the user but run with the authority of an enhanced effective-UID. It
       is the real UID that is checked.
OPTIONS
       debug
           Print debug information.
MODULE TYPES PROVIDED
       The auth, acct and password module types are provided.
RETURN VALUES
       PAM_SUCCESS
           The UID is 0.
       PAM_AUTH_ERR
           The UID is not0.
EXAMPLES
       In the case of the su(1) application the historical usage is to permit
       the superuser to adopt the identity of a lesser user without the use of
       a password. To obtain this behavior with PAM the following pair of
       lines are needed for the corresponding entry in the /etc/pam.d/su
       configuration file:
           # su authentication. Root is granted access by default.
           auth  sufficient   pam_rootok.so
           auth  required     pam_unix.so
SEE ALSO
       su(1), pam.conf(5), pam.d(5), pam(8)
AUTHOR
       pam_rootok was written by Andrew G. Morgan, <morgan AT kernel.org>.
Linux-PAM Manual                  05/18/2017                     PAM_ROOTOK(8)