PAM_ENV(8)

NAME
pam_env - PAM module to set/unset environment variables

SYNOPSIS

pam_env.so [debug] [conffile=conf-file] [envfile=env-file] [readenv=0|1] [user_envfile=env-file] [user_readenv=0|1]

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.

Since setting of PAM environment variables can have side effects to other modules, this module should be the last one on the stack.

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.

MODULE TYPES PROVIDED

The auth and session module types are provided.

RETURN VALUES

PAM_ABORT
    Not all relevant data or options could be gotten.

PAM_BUF_ERR
    Memory buffer error.

PAM_IGNORE
    No pam_env.conf and environment file was found.

PAM_SUCCESS
    Environment variables were set.

FILES

/etc/security/pam_env.conf
    Default configuration file

/etc/environment
    Default environment file

$HOME/.pam_environment
    User specific environment file

SEE ALSO

pam_env.conf(5), pam.d(5), pam(8).

AUTHOR

pam_env was written by Dave Kinchlea <kinch@kinch.ark.com>.