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-rw-r--r--modules/pam_namespace/pam_namespace.8202
1 files changed, 23 insertions, 179 deletions
diff --git a/modules/pam_namespace/pam_namespace.8 b/modules/pam_namespace/pam_namespace.8
index ccfebcc..0037a03 100644
--- a/modules/pam_namespace/pam_namespace.8
+++ b/modules/pam_namespace/pam_namespace.8
@@ -1,161 +1,22 @@
+'\" t
.\" Title: pam_namespace
.\" Author: [see the "AUTHORS" section]
-.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
-.\" Date: 06/21/2011
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\" Date: 09/19/2013
.\" Manual: Linux-PAM Manual
.\" Source: Linux-PAM Manual
.\" Language: English
.\"
-.TH "PAM_NAMESPACE" "8" "06/21/2011" "Linux-PAM Manual" "Linux-PAM Manual"
+.TH "PAM_NAMESPACE" "8" "09/19/2013" "Linux-PAM Manual" "Linux-PAM Manual"
.\" -----------------------------------------------------------------
-.\" * (re)Define some macros
+.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.\" toupper - uppercase a string (locale-aware)
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.de toupper
-.tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ
-\\$*
-.tr aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz
-..
-.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.\" SH-xref - format a cross-reference to an SH section
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-.nr an-break-flag 0
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-\\$1
-.in \\n[an-margin]u
-.ti 0
-.\" if not n (not TTY), put a border/line under subheading
-.sp -.6
-\l'\n(.lu'
-.\}
-..
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-.\" SS - level-two heading that works better for non-TTY output
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-..
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-.in 0
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-.\}
-..
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
@@ -166,17 +27,15 @@
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
-.SH "Name"
+.SH "NAME"
pam_namespace \- PAM module for configuring namespace for a session
-.SH "Synopsis"
-.fam C
+.SH "SYNOPSIS"
.HP \w'\fBpam_namespace\&.so\fR\ 'u
-\fBpam_namespace\&.so\fR [debug] [unmnt_remnt] [unmnt_only] [require_selinux] [gen_hash] [ignore_config_error] [ignore_instance_parent_mode] [no_unmount_on_close] [use_current_context] [use_default_context] [mount_private]
-.fam
+\fBpam_namespace\&.so\fR [debug] [unmnt_remnt] [unmnt_only] [require_selinux] [gen_hash] [ignore_config_error] [ignore_instance_parent_mode] [unmount_on_close] [use_current_context] [use_default_context] [mount_private]
.SH "DESCRIPTION"
.PP
The pam_namespace PAM module sets up a private namespace for a session with polyinstantiated directories\&. A polyinstantiated directory provides a different instance of itself based on user name, or when using SELinux, user name, security context or both\&. If an executable script
-\FC/etc/security/namespace\&.init\F[]
+/etc/security/namespace\&.init
exists, it is used to initialize the instance directory after it is set up and mounted on the polyinstantiated directory\&. The script receives the polyinstantiated directory path, the instance directory path, flag whether the instance directory was newly created (0 for no, 1 for yes), and the user name as its arguments\&.
.PP
The pam_namespace module disassociates the session namespace from the parent namespace\&. Any mounts/unmounts performed in the parent namespace, such as mounting of devices, are not reflected in the session namespace\&. To propagate selected mount/unmount events from the parent namespace into the disassociated session namespace, an administrator may use the special shared\-subtree feature\&. For additional information on shared\-subtree feature, please refer to the mount(8) man page and the shared\-subtree description at http://lwn\&.net/Articles/159077 and http://lwn\&.net/Articles/159092\&.
@@ -217,9 +76,9 @@ If a line in the configuration file corresponding to a polyinstantiated director
Instance parent directories by default are expected to have the restrictive mode of 000\&. Using this option, an administrator can choose to ignore the mode of the instance parent\&. This option should be used with caution as it will reduce security and isolation goals of the polyinstantiation mechanism\&.
.RE
.PP
-\fBno_unmount_on_close\fR
+\fBunmount_on_close\fR
.RS 4
-For certain trusted programs such as newrole, open session is called from a child process while the parent performs close session and pam end functions\&. For these commands use this option to instruct pam_close_session to not unmount the bind mounted polyinstantiated directory in the parent\&.
+Explicitly unmount the polyinstantiated directories instead of relying on automatic namespace destruction after the last process in a namespace exits\&. This option should be used only in case it is ensured by other means that there cannot be any processes running in the private namespace left after the session close\&. It is also useful only in case there are multiple pam session calls in sequence from the same process\&.
.RE
.PP
\fBuse_current_context\fR
@@ -236,7 +95,9 @@ Useful for services which do not use pam_selinux for changing the SELinux contex
.RS 4
This option can be used on systems where the / mount point or its submounts are made shared (for example with a
\fBmount \-\-make\-rshared /\fR
-command)\&. The module will make the polyinstantiated directory mount points private\&. Normally the pam_namespace will try to detect the shared / mount point and make the polyinstantiated directories private automatically\&. This option has to be used just when only a subtree is shared and / is not\&.
+command)\&. The module will mark the whole directory tree so any mount and unmount operations in the polyinstantiation namespace are private\&. Normally the pam_namespace will try to detect the shared / mount point and make the polyinstantiated directories private automatically\&. This option has to be used just when only a subtree is shared and / is not\&.
+.sp
+Note that mounts and unmounts done in the private namespace will not affect the parent namespace if this option is used or when the shared / mount point is autodetected\&.
.RE
.SH "MODULE TYPES PROVIDED"
.PP
@@ -261,17 +122,17 @@ Unexpected namespace configuration error occurred\&.
.RE
.SH "FILES"
.PP
-\FC/etc/security/namespace\&.conf\F[]
+/etc/security/namespace\&.conf
.RS 4
Main configuration file
.RE
.PP
-\FC/etc/security/namespace\&.d\F[]
+/etc/security/namespace\&.d
.RS 4
Directory for additional configuration files
.RE
.PP
-\FC/etc/security/namespace\&.init\F[]
+/etc/security/namespace\&.init
.RS 4
Init script for instance directories
.RE
@@ -286,24 +147,14 @@ To use polyinstantiation with graphical display manager gdm, insert the followin
/usr/sbin/gdm\-safe\-restart
.PP
This allows gdm to restart after each session and appropriately adjust namespaces of display manager and the X server\&. If polyinstantiation of /tmp is desired along with the graphical environment, then additional configuration changes are needed to address the interaction of X server and font server namespaces with their use of /tmp to create communication sockets\&. Please use the initialization script
-\FC/etc/security/namespace\&.init\F[]
+/etc/security/namespace\&.init
to ensure that the X server and its clients can appropriately access the communication socket X0\&. Please refer to the sample instructions provided in the comment section of the instance initialization script
-\FC/etc/security/namespace\&.init\F[]\&. In addition, perform the following changes to use graphical environment with polyinstantiation of /tmp:
+/etc/security/namespace\&.init\&. In addition, perform the following changes to use graphical environment with polyinstantiation of /tmp:
.PP
-
-.sp
.if n \{\
.RS 4
.\}
-.fam C
-.ps -1
.nf
-.if t \{\
-.sp -1
-.\}
-.BB lightgray adjust-for-leading-newline
-.sp -1
-
1\&. Disable the use of font server by commenting out "FontPath"
line in /etc/X11/xorg\&.conf\&. If you do want to use the font server
then you will have to augment the instance initialization
@@ -317,20 +168,13 @@ to ensure that the X server and its clients can appropriately access the communi
"AlwaysRestartServer=true", and it is not overridden by
/etc/gdm/custom\&.conf\&.
-.EB lightgray adjust-for-leading-newline
-.if t \{\
-.sp 1
-.\}
.fi
-.fam
-.ps +1
.if n \{\
.RE
.\}
.sp
.SH "SEE ALSO"
.PP
-
\fBnamespace.conf\fR(5),
\fBpam.d\fR(5),
\fBmount\fR(8),