pam_exec -- PAM module which calls an external command
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DESCRIPTION

   pam_exec is a PAM module that can be used to run an external command.

   The child's environment is set to the current PAM environment list, as
   returned by pam_getenvlist(3) In addition, the following PAM items are
   exported as environment variables: PAM_RHOST, PAM_RUSER, PAM_SERVICE,
   PAM_TTY, PAM_USER and PAM_TYPE, which contains one of the module types:
   account, auth, password, open_session and close_session.

   Commands called by pam_exec need to be aware of that the user can have
   control over the environment.

OPTIONS

   debug
          Print debug information.

   expose_authtok
          During authentication and password change the calling command
          can read the password from stdin(3). Only first
          PAM_MAX_RESP_SIZE bytes of a password are provided to the
          command.

   log=file
          The output of the command is appended to file

   type=type
          Only run the command if the module type matches the given type.

   stdout
          Per default the output of the executed command is written to
          /dev/null. With this option, the stdout output of the executed
          command is redirected to the calling application. It's in the
          responsibility of this application what happens with the output.
          The log option is ignored.

   quiet
          Per default pam_exec.so will echo the exit status of the
          external command if it fails. Specifying this option will
          suppress the message.

   quiet_log
          Per default pam_exec.so will log the exit status of the external
          command if it fails. Specifying this option will suppress the
          log message.

   seteuid
          Per default pam_exec.so will execute the external command with
          the real user ID of the calling process. Specifying this option
          means the command is run with the effective user ID.

EXAMPLES

   Add the following line to /etc/pam.d/passwd to rebuild the NIS database
   after each local password change:
        password optional pam_exec.so seteuid /usr/bin/make -C /var/yp

   This will execute the command
make -C /var/yp

   with effective user ID.

AUTHOR

   pam_exec was written by Thorsten Kukuk <kukuk@thkukuk.de> and Josh
   Triplett <josh@joshtriplett.org>.
