$OpenBSD: README-main,v 1.4 2013/01/06 08:42:08 ajacoutot Exp $

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| Running ${FULLPKGNAME} on OpenBSD
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Adding and/or configuring CUPS printers can be done with lpadmin(8), but
for a quick and easy (graphical) setup, after starting the CUPS daemon,
point your browser to:
    http://localhost:631

By default, CUPS only supports a handful amount of printers. There is a
good chance your printer is supported by the Foomatic framework in which
case the pkg-readmes documentation from the "foomatic-db-engine" package
will tell you how to add more drivers to the system.
Note that when using the CUPS cli tools or web interface, it is not
necessary to use foomatic-ppdfile(1) directly, CUPS will automatically
generate the required PPD file if the corresponding Foomatic DB is
installed.

To be able to use CUPS printers from GTK+3 applications, the gtk+3-cups
package needs to be installed.

PRINTER SHARING USING mDNS
==========================
Browsing for shared printers can be done with multicast DNS (mDNS) using
the avahi daemon.

On the client side, "avahi-daemon" and "cups-browsed" must be running by
adding "avahi_daemon" and "cups_browsed" to the pkg_scripts variable in
rc.conf.local(5).

One the server side, "avahi-daemon" must be running by adding
"avahi_daemon" to the pkg_scripts variable in rc.conf.local(5). Then
printer sharing can be activated using the CUPS web interface or running
the following commands as root or a member of the wheel group:
    cupsctl --share-printers
    lpadmin -p <printer_name> -o printer-is-shared=true

USB
===
Since USB printing will be handled by libusb, you need to allow the
_cups user access to the corresponding USB endpoint. To do so, find
where your printer is attached to using `sudo usbdevs -vd` then change
the ownerships accordingly.

e.g.
Controller /dev/usb3:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x8086), rev 1.00
  uhub3
 port 1 powered
 port 2 addr 2: full speed, self powered, config 1, USB MFP(0x082f), EPSON(0x04b8), rev 1.00, iSerialNumber L83010704250947490
   ugen0

$ sudo chown _cups /dev/ugen0.* /dev/usb3

The reason we are changing the user and not the group is that it will
allow for multi-function devices to work for both printing and scanning
(e.g. by being owned by _cups:_saned).

To preserve your changes after a system update, use rc.local(8).
e.g. for a multi-function printer/scanner add the following lines:
chown _cups:_saned /dev/ugen0.* /dev/usb1

Alternatively, hotplugd(8) attach/detach scripts can automate this.

*** WARNING ***
ulpt(4) needs to be disable in the kernel (see config(8)) or the printer
will not be available to libusb.