pam_env ? PAM module to set/unset environment variables
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DESCRIPTION
The pam_env PAM module allows the (un)setting of environment variables.
Supported is the use of previously set environment variables as well as
PAM_ITEMs such as PAM_RHOST.
By default rules for (un)setting of variables is taken from the config file /
etc/security/pam_env.conf if no other file is specified.
This module can also parse a file with simple KEY=VAL pairs on separate lines
(/etc/environment by default). You can change the default file to parse, with
the envfile flag and turn it on or off by setting the readenv flag to 1 or 0
respectively.
OPTIONS
conffile=/path/to/pam_env.conf
Indicate an alternative pam_env.conf style configuration file to override
the default. This can be useful when different services need different
environments.
debug
A lot of debug information is printed with syslog(3).
envfile=/path/to/environment
Indicate an alternative environment file to override the default. This can
be useful when different services need different environments.
readenv=0|1
Turns on or off the reading of the file specified by envfile (0 is off, 1
is on). By default this option is on.
user_envfile=filename
Indicate an alternative .pam_environment file to override the default. This
can be useful when different services need different environments. The
filename is relative to the user home directory.
user_readenv=0|1
Turns on or off the reading of the user specific environment file. 0 is
off, 1 is on. By default this option is off as user supplied environment
variables in the PAM environment could affect behavior of subsequent
modules in the stack without the consent of the system administrator.
EXAMPLES
These are some example lines which might be specified in /etc/security/
pam_env.conf.
Set the REMOTEHOST variable for any hosts that are remote, default to
"localhost" rather than not being set at all
REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
Set the DISPLAY variable if it seems reasonable
DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
Now some simple variables
PAGER DEFAULT=less
MANPAGER DEFAULT=less
LESS DEFAULT="M q e h15 z23 b80"
NNTPSERVER DEFAULT=localhost
PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin\
:/usr/bin:/usr/local/bin/X11:/usr/bin/X11
Silly examples of escaped variables, just to show how they work.
DOLLAR DEFAULT=\$
DOLLARDOLLAR DEFAULT= OVERRIDE=\$${DOLLAR}
DOLLARPLUS DEFAULT=\${REMOTEHOST}${REMOTEHOST}
ATSIGN DEFAULT="" OVERRIDE=\@
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