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Linux 2.6 - man page for pam_rootok (linux section 8)

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 not 0.

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(7)

AUTHOR
       pam_rootok was written by Andrew G. Morgan, <morgan@kernel.org>.

Linux-PAM Manual			    06/04/2011				    PAM_ROOTOK(8)


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