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Diffstat (limited to 'modules/pam_securetty/pam_securetty.8')
| -rw-r--r-- | modules/pam_securetty/pam_securetty.8 | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/modules/pam_securetty/pam_securetty.8 b/modules/pam_securetty/pam_securetty.8 new file mode 100644 index 0000000..a808aea --- /dev/null +++ b/modules/pam_securetty/pam_securetty.8 @@ -0,0 +1,140 @@ +'\" t +.\" Title: pam_securetty +.\" Author: [see the "AUTHOR" section] +.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/> +.\" Date: 09/03/2021 +.\" Manual: Linux-PAM Manual +.\" Source: Linux-PAM Manual +.\" Language: English +.\" +.TH "PAM_SECURETTY" "8" "09/03/2021" "Linux-PAM Manual" "Linux\-PAM Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +pam_securetty \- Limit root login to special devices +.SH "SYNOPSIS" +.HP \w'\fBpam_securetty\&.so\fR\ 'u +\fBpam_securetty\&.so\fR [debug] +.SH "DESCRIPTION" +.PP +pam_securetty is a PAM module that allows root logins only if the user is logging in on a "secure" tty, as defined by the listing in the +securetty +file\&. pam_securetty checks at first, if +/etc/securetty +exists\&. If not and it was built with vendordir support, it will use +<vendordir>/securetty\&. pam_securetty also checks that the +securetty +files are plain files and not world writable\&. It will also allow root logins on the tty specified with +\fBconsole=\fR +switch on the kernel command line and on ttys from the +/sys/class/tty/console/active\&. +.PP +This module has no effect on non\-root users and requires that the application fills in the +\fBPAM_TTY\fR +item correctly\&. +.PP +For canonical usage, should be listed as a +\fBrequired\fR +authentication method before any +\fBsufficient\fR +authentication methods\&. +.SH "OPTIONS" +.PP +\fBdebug\fR +.RS 4 +Print debug information\&. +.RE +.PP +\fBnoconsole\fR +.RS 4 +Do not automatically allow root logins on the kernel console device, as specified on the kernel command line or by the sys file, if it is not also specified in the +securetty +file\&. +.RE +.SH "MODULE TYPES PROVIDED" +.PP +Only the +\fBauth\fR +module type is provided\&. +.SH "RETURN VALUES" +.PP +PAM_SUCCESS +.RS 4 +The user is allowed to continue authentication\&. Either the user is not root, or the root user is trying to log in on an acceptable device\&. +.RE +.PP +PAM_AUTH_ERR +.RS 4 +Authentication is rejected\&. Either root is attempting to log in via an unacceptable device, or the +securetty +file is world writable or not a normal file\&. +.RE +.PP +PAM_BUF_ERR +.RS 4 +Memory buffer error\&. +.RE +.PP +PAM_CONV_ERR +.RS 4 +The conversation method supplied by the application failed to obtain the username\&. +.RE +.PP +PAM_INCOMPLETE +.RS 4 +The conversation method supplied by the application returned PAM_CONV_AGAIN\&. +.RE +.PP +PAM_SERVICE_ERR +.RS 4 +An error occurred while the module was determining the user\*(Aqs name or tty, or the module could not open the +securetty +file\&. +.RE +.PP +PAM_USER_UNKNOWN +.RS 4 +The module could not find the user name in the +/etc/passwd +file to verify whether the user had a UID of 0\&. Therefore, the results of running this module are ignored\&. +.RE +.SH "EXAMPLES" +.PP +.if n \{\ +.RS 4 +.\} +.nf +auth required pam_securetty\&.so +auth required pam_unix\&.so + +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.PP +\fBsecuretty\fR(5), +\fBpam.conf\fR(5), +\fBpam.d\fR(5), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +pam_securetty was written by Elliot Lee <sopwith@cuc\&.edu>\&. |