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pam_env.conf
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# # This is the configuration file for pam_env, a PAM module to load in # a configurable list of environment variables for a # # The original idea for this came from Andrew G. Morgan ... #<quote> # Mmm. Perhaps you might like to write a pam_env module that reads a # default environment from a file? I can see that as REALLY # useful... Note it would be an "auth" module that returns PAM_IGNORE # for the auth part and sets the environment returning PAM_SUCCESS in # the setcred function... #</quote> # # What I wanted was the REMOTEHOST variable set, purely for selfish # reasons, and AGM didn't want it added to the SimpleApps login # program (which is where I added the patch). So, my first concern is # that variable, from there there are numerous others that might/would # be useful to be set: NNTPSERVER, LESS, PATH, PAGER, MANPAGER ..... # # Of course, these are a different kind of variable than REMOTEHOST in # that they are things that are likely to be configured by # administrators rather than set by logging in, how to treat them both # in the same config file? # # Here is my idea: # # Each line starts with the variable name, there are then two possible # options for each variable DEFAULT and OVERRIDE. # DEFAULT allows an 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. # # VARIABLE [DEFAULT=[value]] [OVERRIDE=[value]] # # (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't make it available by the time you need it. # # # First, some special variables # # 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=\@