This is the documentation for ippusb_manager
which is a service needed to support ipp-over-usb printing in Chrome OS.
The ippusb_manager
service assists with establishing communication between cups and ippusbxd in order to print using ipp-over-usb.
When CUPS
tries to print using the ippusb
scheme, it first queries ippusb_manager
to verify that the given printer is currently connected on the system. The ippusb_manager
searches for the given printer, and if it is found then it launches and instance of the ippusbxd program, and responds to cups with the name of the socket it can use to communicate with ippusbxd.
In order to prevent ippusb_manager
from having to constantly be running, the upstart-socket-bridge is used to start the manager whenever its socket receives a query from cups.
See the design doc for information about the overall design and how ippusb_manager
fits into it. This is accessible only within google.
This repository contains the following subdirectories:
| Subdirectory | Description | |----------------------------| | etc/init
| Upstart config files for launching ippusb_manager
| | udev/
| udev rules for setting group permissions on ipp-usb printers |