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Manual Reference Pages  - PAM_ROOTOK (8)

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pam_rootok - Gain only root access

CONTENTS

pam_rootok.so [debug]

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.

debug
	Print debug information.

Only the auth service is supported.

PAM_SUCCESS
	The UID is 0.
PAM_AUTH_ERR
	The UID is not 0.

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
     

su(1), pam.conf(5), pam.d(8), pam(8)

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

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