faxrunqd(8)
NAME
faxrunqd - daemon to send fax jobs queued by faxspool(1)
SYNOPSIS
faxrunqd [-v] [-d] [-D] [-l <ttys>] [-u <user or uid>] [ -g <group or
gid> ] [-V]
DESCRIPTION
Runs in the background, and regularily checks the fax queue set up by
faxspool(1). Sends all jobs that are due, records results, and takes
appropriate action (notify mails etc).
faxrunqd basically does the same as faxrunq(1), just more so. Please
read the faxrunq(1) man page if you're not already familiar with the
concept.
The advantages of faxrunqd are:
- runs all the time, so you don't have to set up a cron job (but you
have to set up an entry in /etc/inittab or start it from /etc/rc*)
- quicker response to new faxes in queue
- can sensibly handle more than one modem
- can handle prioritized fax jobs
- can do 'policy routing' of faxes depending on the fax number
The disadvantages are:
- needs more system ressources if you have only little fax traffic
- requires Perl 5.004
- more tricky to set up and to debug
SETUP
faxrunqd is started at system boot from /etc/rc.*, or from
/etc/inittab. You can also start it from the command line. It does not
put itself in the background, so you have to start it with an "&", or
from a ":respawn:" line in /etc/inittab. Using /etc/inittab has the
advantage that faxrunqd is restarted automatically if something goes
wrong and faxrunqd is stopped.
faxrunqd will first read a global configuration file (see below), then
(optionally) the faxrunqd policy file (see further below). From then
on, it will sit in a loop. It will check the fax queue every 60 seconds
for new jobs, and will then distribute them over all available modems.
If the job is sent, or fails, it will do the same thing faxrunq(1)
would do (send a mail, delete the JOB directory, execute a named
program, etc.). Both programs are fully compatible in this respect.
faxrunqd [-v] [-d] [-D] [-l <ttys>] [-u <user or uid>] [ -g <group or
gid> ] [-V]
OPTIONS
-v Tells faxrunqd to write progress information to the log file.
-D Tells faxrunqd to run in the background, as a daemon.
-d Tells faxrunqd to write debugging information to stdout and the
log file (usually used together with -v).
-l <ttyS>
Specifies the list of modem devices to use. Multiple devices
are separated with ':', e.g. '-l ttyS0:ttyS1'.
-u <user or uid>
faxrunqd can now (since 1.1.29) run as unprivileged user. If
you start it as root from /etc/inittab or from one of the
/etc/rc* scripts, it's strongly recommended to use '-u uucp' (to
be precise: the user that is owning the outgoing fax spool
directory). This will make faxrunqd drop all its privileges at
startup, and run as the specified user. Running faxrunqd as
root user might lead to security problems - don't do it. This
parameter takes either a uid or a username as argument.
-g <group or gid>
Same effect as above but for the group id. Indicates the group
which should own the fax files. This parameter takes either a
gid or a groupname as argument.
-V print version number and exit
CONFIGURATION FILE
Some aspects of the behaviour of faxrunqd can be controlled by a
configuration file, usually named /etc/mgetty/faxrunq.config (this is
the same file that faxrunq(1) uses, but there are additional options
for faxrunqd). In this file, you can use the following options:
success-send-mail [y/n]
A boolean parameter that controls whether a mail will be sent
after successful completition of the fax job.
failure-send-mail [y/n]
A boolean parameter that controls whether a mail will be sent
after the fax job has failed more than the maximum number of
times.
success-call-program <name>
Here, you can specify a program that will be run when the fax
has been successfully sent. It will be passed two command line
parameters. The first is the full path to the fax JOB file (see
faxq(5)), the second is the last exit code from sendfax (for
success-call-program, this is always "0").
failure-call-program <name>
Similar to the "success-call-program", this program will be run
when the fax has been failed too often and faxrunqd gives up.
This script could, for example, print out the fax on a printer
so that it can be sent manually on a paper fax machine.
update-call-program <name>
This is, again, similar to "success-call-program". It will be
called for interim status updates ("we've tried and it was
BUSY"), so that frontend programs can display this information.
"update-call-program" will only be called for jobs that will be
kept in the fax queue for at least one more try.
maxfail-costly <n>
This specifies the number of times that a fax may fail
"fatally", that is, causing telephone costs (explained above).
The default value is 5.
maxfail-total <m>
This is the absolute maximum number of times that faxrunqd will
try to send any given fax. The default value is 10.
delete-sent-jobs [y/n]
Determines whether faxrunqd should delete jobs after sending, or
leave them in the fax queue (while moving the "JOB" file to
"JOB.done") so that they can be seen at by "faxq -o". The
default value is "do not delete sent faxes".
acct-log <path>
Specifies where faxrunqd should protocol success and failure of
each try to send a fax job. The default location is
/var/spool/fax/outgoing/acct.log.
The options that are specific to faxrunqd are:
fax-devices [tty(s)]
Specifies which ttys should be used for sending jobs. faxrunqd
will always explicitely tell sendfax which modem to use, so the
settings in sendfax.config are ignored. If you use policy
routing (see below), this applies only to fax jobs that do not
have a tty set by faxrunqd.policy.
faxrunqd-log [filename]
Specifies where logging information is written to. This is only
used if faxrunqd is called with the -v or -d option.
policy-config [filename]
Specifies a file containing rules for "policy routing", see
below. Default is "no file".
faxrunqd-max-pages [n]
If this is set to something greater 1 (default is 10), faxrunqd
will combine multiple jobs to the same receipient telephone
number into one telephone call. The maximum number of pages
that the resulting job may have is specified here. Usually it
makes no sense to increase this, but in some surroundings it
might make sense to turn off this feature by setting it to 1.
sendfax-tty-map [tty] [program path] [args]
Some special cases might require running a non-default sendfax
binary for specific ttys (like "testing new version" or "some
other call-compatible sendfax applications for non-class-2
modems"). If you want mappings for more than one "special" tty
devices, just use the option multiple times. Example:
sendfax-tty-map capi0 /usr/sbin/sendfax.capi
queue-length-high [number] [program path] [args]
run the specified command when the number of jobs in the fax
queue exceeds number (this could be used to send out a warning
by syslog or e-mail when too many modems fail on a busy system,
and faxes get stuck). The script will be run only once, unless
the queue length falls below the ``low water mark'' threshold
and rises again later on.
queue-length-low [number] [program path] [args]
run the specified command when the queue length has been over
the ``high water'' threshold, and is back below this number.
This can be used to send ``everything is back to normal'' e-
mails, or just to reset the alarm threshold.
modem-error-threshold [number] [program path] [args]
this script is called whenever a given modem has more than
number consecutive errors. Every successfully sent fax always
resets the counter for a given modem to 0. This can be used to
notify the sysadmin when a modem breaks (by default, faxrunqd
just phases out a problematic modem, but will not report the
problem).
POLICY ROUTING
faxrunqd can do some things differently, depending on the phone number
where the fax is supposed to be sent to. For example, this might be
useful to:
- send in-house faxes over a specific modem connected to a PABX (to
avoid paying telco charges)
- send long-distance faxes to the US over a special LD provider, that
is, use a specific dial-prefix for those
- use extra high debugging when sending to a known-to-be problematic
receipient
etc.
This feature is controlled by a file, containing match / substitute
rules. The name of the file is specified with the "policy-config"
option in faxrunq.config.
The file is read from top to bottom. Each line starting with a "#"
sign is a comment, and is skipped. In every other line, the first
field of the line is interpreted as a "match" clause, and compared to
the telefone number of an to-be-sent fax job. Regular expressions can
be used (see perlre(1)).
If the telefone number is matched, the second field is used to
substitute parts of the telefone number, for example, cut off a local
prefix, or change a digit, or whatever. If you do not want any
substitutions, put a "-" in that field.
The third field specifies the tty lines to use for faxes matched by
this line (for example, you might have one modem connected to a long-
distance provider, and others for local use or so). Put a "-" in this
field if you want to use the default fax modems.
The remaining part of the line are appended to the sendfax command
line. With those, you can set a different dial-string ("-D ATD"), or a
higher debug level ("-x 9"), or whatever else you can imagine. Do NOT
set a tty to use here ("-l ttyS1"), because that would confuse the
internal tty handling of faxrunqd, leading to weird effects processing
the fax queue!!
Examples:
# 12345-nnn is sent to "nnn" over a local PABX, modem on tty2
^12345 s/12345// tty2
# fax to 56789 (exact match) is sent with higher debugging
^56789$ - - -x 8
FILES
/var/spool/fax/outgoing/stop
if this file exists, faxrunqd will stop whatever it's doing at
the moment, wait for all outstanding jobs, and then fall asleep
until the file is removed. You can use this to stop queue
processing while testing something, or if you know that the
modem(s) are unavailable and do not want to run into any error
messages, etc.
/var/spool/fax/outgoing/faxqueue_done
Every time faxrunqd runs the fax queue, a time stamp is written
into that file. It is used by faxspool to display a warning if
the queue hasn't been run recently (so faxes may get stuck).
SIGNALS
To control faxrunqd's behaviour, you can send it the following signals:
SIGINT
SIGTERM
remove lock file, remove pid file, terminate immediately.
SIGHUP finish all fax jobs that are currently being sent, then
terminate (this is used to signal faxrunqd "I want you to
terminate" without disturbing the normal flow of operation -
SIGINT/TERM etc. can lead to some faxes being sent twice).
SIGUSR1
close, roll, and re-open log file.
SIGUSR2
dump current modem success/failure statistics to log file.
BUGS
faxrunqd does not report if a modem goes bad - instead it will just
stop using it (which is good for reliable faxing, but bad for error
recovery).
SEE ALSO
faxspool(1), sendfax(8), faxq(1), faxrunq(1), faxqueue(5)
AUTHOR
faxrunqd is Copyright (C) 1997-2004 by Gert Doering,
<gert@greenie.muc.de>. It was inspired by Bodo Bauer's initial
faxrunqd, but completely rewritten.
Free and Open Source Software