faxq-helper (8) - Linux Manuals
faxq-helper: privileged helper process to access the fax queue
faxq-helper - privileged helper process to access the fax queue
SYNOPSISfaxq-helper <command> [<options>]
DESCRIPTIONfaxq-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 ``fax'', 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:
To achieve this, faxq-helper is installed set-user-id fax. If you remove the suid bit, or chown the fax queue directory to a different user, it will stop working.
RETURN VALUESfaxq-helper has the following exit() values:
everything went fine
invalid JOB ID specified on the command line
some problem with the directory setup of the outgoing queue dir,
/var/spool/fax/outgoing (it will print a detailed error message)
some problems with the user ID setup of the ``fax'' user (it will
print a detailed error message)
failure to process the specified command (it will print a detailed
AUTHORfaxq-helper is Copyright (C) 2004-2006 by Gert Doering, <gert [at] greenie.muc.de>.