pam_rootok(8)

1PAM_ROOTOK(8)                  Linux-PAM Manual                  PAM_ROOTOK(8)
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NAME

6       pam_rootok - Gain only root access
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SYNOPSIS

9       pam_rootok.so [debug]
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DESCRIPTION

12       pam_rootok is a PAM module that authenticates the user if their UID is
13       0. Applications that are created setuid-root generally retain the UID
14       of the user but run with the authority of an enhanced effective-UID. It
15       is the real UID that is checked.
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OPTIONS

18       debug
19           Print debug information.
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MODULE TYPES PROVIDED

22       The auth, acct and password module types are provided.
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RETURN VALUES

25       PAM_SUCCESS
26           The UID is 0.
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28       PAM_AUTH_ERR
29           The UID is not0.
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EXAMPLES

32       In the case of the su(1) application the historical usage is to permit
33       the superuser to adopt the identity of a lesser user without the use of
34       a password. To obtain this behavior with PAM the following pair of
35       lines are needed for the corresponding entry in the /etc/pam.d/su
36       configuration file:
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38           # su authentication. Root is granted access by default.
39           auth  sufficient   pam_rootok.so
40           auth  required     pam_unix.so
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AUTHOR

48       pam_rootok was written by Andrew G. Morgan, <morgan@kernel.org>.
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52Linux-PAM Manual                  05/18/2017                     PAM_ROOTOK(8)