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'\" t
.\" Title: pam_env.conf
.\" Author: [see the "AUTHOR" section]
.\" 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_ENV\&.CONF" "5" "09/19/2013" "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
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.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
pam_env.conf \- the environment variables config file
.SH "DESCRIPTION"
.PP
The
/etc/security/pam_env\&.conf
file specifies the environment variables to be set, unset or modified by
\fBpam_env\fR(8)\&. When someone logs in, this file is read and the environment variables are set according\&.
.PP
Each line starts with the variable name, there are then two possible options for each variable DEFAULT and OVERRIDE\&. DEFAULT allows and administrator to set the value of the variable to some default value, if none is supplied then the empty string is assumed\&. The OVERRIDE option tells pam_env that it should enter in its value (overriding the default value) if there is one to use\&. OVERRIDE is not used, "" is assumed and no override will be done\&.
.PP
\fIVARIABLE\fR
[\fIDEFAULT=[value]\fR] [\fIOVERRIDE=[value]\fR]
.PP
(Possibly non\-existent) environment variables may be used in values using the ${string} syntax and (possibly non\-existent) PAM_ITEMs may be used in values using the @{string} syntax\&. Both the $ and @ characters can be backslash escaped to be used as literal values values can be delimited with "", escaped " not supported\&. Note that many environment variables that you would like to use may not be set by the time the module is called\&. For example, HOME is used below several times, but many PAM applications don\*(Aqt make it available by the time you need it\&.
.PP
The "\fI#\fR" character at start of line (no space at front) can be used to mark this line as a comment line\&.
.SH "EXAMPLES"
.PP
These are some example lines which might be specified in
/etc/security/pam_env\&.conf\&.
.PP
Set the REMOTEHOST variable for any hosts that are remote, default to "localhost" rather than not being set at all
.sp
.if n \{\
.RS 4
.\}
.nf
REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
.fi
.if n \{\
.RE
.\}
.PP
Set the DISPLAY variable if it seems reasonable
.sp
.if n \{\
.RS 4
.\}
.nf
DISPLAY DEFAULT=${REMOTEHOST}:0\&.0 OVERRIDE=${DISPLAY}
.fi
.if n \{\
.RE
.\}
.PP
Now some simple variables
.sp
.if n \{\
.RS 4
.\}
.nf
PAGER DEFAULT=less
MANPAGER DEFAULT=less
LESS DEFAULT="M q e h15 z23 b80"
NNTPSERVER DEFAULT=localhost
PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\e
:/usr/bin:/usr/local/bin/X11:/usr/bin/X11
.fi
.if n \{\
.RE
.\}
.PP
Silly examples of escaped variables, just to show how they work\&.
.sp
.if n \{\
.RS 4
.\}
.nf
DOLLAR DEFAULT=\e$
DOLLARDOLLAR DEFAULT= OVERRIDE=\e$${DOLLAR}
DOLLARPLUS DEFAULT=\e${REMOTEHOST}${REMOTEHOST}
ATSIGN DEFAULT="" OVERRIDE=\e@
.fi
.if n \{\
.RE
.\}
.SH "SEE ALSO"
.PP
\fBpam_env\fR(8),
\fBpam.d\fR(5),
\fBpam\fR(8)
.SH "AUTHOR"
.PP
pam_env was written by Dave Kinchlea <kinch@kinch\&.ark\&.com>\&.
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