faxq-helper - privileged helper process to access the fax queue

faxq-helper is Copyright (C) 2004-2006 by Gert Doering, <gert@greenie.muc.de>.

greenie                                             18 Feb 06                                     faxq-helper(1)

faxq-helper is part of the internal workings of faxspool(1).

       Formerly, the /var/spool/fax/outgoing directory was world-writeable, leading to all sort of funny symlink
       attacks against faxspool(1) and faxrunq(8).

       These  days, it's owned by the user ``uucp'', and only this user can write to it.  To be able to put jobs
       there, faxspool(1) calls faxq-helper for very clearly defined purposes:

        - make a new queue directory

        - put a new fax G3 file into this queue directory

        - put a JOB file into this queue directory, and activate the fax job

       and possibly:

        - remove a fax job from the queue (to be used by faxrm and in case of errors)

        - re-queue a job that has been suspended due to repeated failures (faxq -r)

       To achieve this, faxq-helper is installed set-user-id uucp.  If you remove the suid bit, or chown the fax
       queue directory to a different user, it will stop working.

       faxq-helper - privileged helper process to access the fax queue

faxq-helper has the following exit() values:

       0      everything went fine

       1      invalid JOB ID specified on the command line

       2      some problem with the directory setup of the outgoing queue dir, /var/spool/fax/outgoing (it  will
              print a detailed error message)

       3      some problems with the user ID setup of the ``uucp'' user (it will print a detailed error message)

       10     failure to process the specified command (it will print a detailed error message)

faxspool(1), faxq(1), faxrm(1), faxqueue(5)

faxq-helper<command>[<options>]