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README PAM-script has been written by Jeroen Nijhof <email@example.com> with packaging and some modifications by R.K. Owen <firstname.lastname@example.org>. Description: PAM-script allows you to execute scripts during authorization, passwd changes, or session opening or closing. So if you need extra work done after login you can use this pam module to execute a session script. Options to pam_script.so: onerr=(success|fail) - default behavior if the module can not find or execute the various pam-scripts. The default is 'fail'. dir=/some/path - where to find the pam-scripts listed below. All options are passed on to the script commandlines and those not intercepted by PAM may be used to modify the script behavior. Module-type and Scripts: auth: pam_script_auth - username/password handshake account: pam_script_acct - non-auth account management passwd: pam_script_passwd - changing a password session: pam_script_ses_open - actions performed before and pam_script_ses_close after a session All the scripts will be passed several environment variables: PAM_USER, PAM_RUSER, PAM_RHOST, PAM_SERVICE, PAM_AUTHTOK, PAM_OLDAUTHTOK, PAM_TTY, and PAM_TYPE referring to the module-type. Whether the variable has a non-null value or not depends on the context. Pam.conf example: --- start pam.conf --- ssh auth required pam_script.so ssh session required pam_script.so ssh passwd required pam_script.so --- end pam.conf --- or as an extra step (here pam_script.so is optional because this application does some extra logging and doesn't want access denied if there is a problem): --- start pam.conf --- ssh auth required pam_unix.so ssh auth optional pam_script.so ssh session required pam_unix.so ssh session optional pam_script.so ssh passwd required pam_unix.so ssh passwd optional pam_script.so --- end pam.conf --- This example application has the pam_script_auth script check a database and return non-zero if the user should not be granted access. If the script does not exist or is not executable at all levels (chmod a+x) then deny access. ssh auth required pam_unix.so ssh auth required pam_script.so onerr=fail Debugging: Get the pamtest.c program from the pam-dotfile distribution and it can be used to step through the module. Examples: Look at the README.examples file, which may be located under /usr/share/doc/libpam-script/ for a Debian derived distribution. Problem/BUGS report: If you find any bugs or problems just mail me Jeroen Nijhof <email@example.com>
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