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

6       pam_securetty - Limit root login to special devices
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SYNOPSIS

9       pam_securetty.so [debug]
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DESCRIPTION

12       pam_securetty is a PAM module that allows root logins only if the user
13       is logging in on a "secure" tty, as defined by the listing in
14       /etc/securetty. pam_securetty also checks to make sure that
15       /etc/securetty is a plain file and not world writable.
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17       This module has no effect on non-root users and requires that the
18       application fills in the PAM_TTY item correctly.
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20       For canonical usage, should be listed as a required authentication
21       method before any sufficient authentication methods.
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OPTIONS

24       debug
25           Print debug information.
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MODULE TYPES PROVIDED

28       Only the auth module type is provided.
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RETURN VALUES

31       PAM_SUCCESS
32           The user is allowed to continue authentication. Either the user is
33           not root, or the root user is trying to log in on an acceptable
34           device.
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36       PAM_AUTH_ERR
37           Authentication is rejected. Either root is attempting to log in via
38           an unacceptable device, or the /etc/securetty file is world
39           writable or not a normal file.
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41       PAM_INCOMPLETE
42           An application error occurred. pam_securetty was not able to get
43           information it required from the application that called it.
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45       PAM_SERVICE_ERR
46           An error occurred while the module was determining the user´s name
47           or tty, or the module could not open /etc/securetty.
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49       PAM_USER_UNKNOWN
50           The module could not find the user name in the /etc/passwd file to
51           verify whether the user had a UID of 0. Therefore, the results of
52           running this module are ignored.
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EXAMPLES

55           auth  required  pam_securetty.so
56           auth  required  pam_unix.so
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SEE ALSO

61       securetty(5), pam.conf(5), pam.d(5), pam(8)
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AUTHOR

64       pam_securetty was written by Elliot Lee <sopwith@cuc.edu>.
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68Linux-PAM Manual                  03/02/2009                  PAM_SECURETTY(8)
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