             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>.
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