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OpenPrinting / ipp-usb

ipp-usb -- HTTP reverse proxy, backed by IPP-over-USB connection to device
BSD 2-Clause "Simplified" License
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ipp-usb only for systemd? #25

Open Golddouble opened 3 years ago

Golddouble commented 3 years ago

Hello,

I was successful to use ipp-usb when I boot Linux with systemd, but not when I boot with sysVinit. Does ipp-usb not support sysVinit?

Thank you.

alexpevzner commented 3 years ago

Hi!

It should work with sysVinit, but somebody needs to write appropriate scripts.

ipp-usb has two modes of operations:

1) udev mode

ipp-usb udev

In this mode ipp-usb assumes that it will be started every time when compatible device is plugged into the system, and automatically exits when all compatible devices are unplugged.

2) standalone mode

ipp-usb standalone

In this mode, ipp-usb runs forever, and automatically handles PnP events by itself, serving all connected compatible devices.

Both of these modes can be used with -bg flag, which tells ipp-usb to deamonize itself.

Golddouble commented 3 years ago

Thank you.

Please note: I am just a user and do not really understand what I am doing.

But I have made the following experiments in a terminal (This is with "ipp-usb_0.9.17-1+48.2_amd64.deb" and "sysVinit":

  1. sudo ipp-usb udev

Result: The printer is recognised. But only if it was already pluged in before I ran this command in the terminal. When I then plug the printer out and plug it in again, then it is not recognised.

  1. sudo ipp-usb udev -bg

Result: Same behaviour like 1)

  1. sudo ipp-usb standalone

Result: The printer is recognized. No matter if it was already pluged in before I have run this command in the terminal. But the terminal can not be closed. It is somehow in process in a loop. So I had to breake off the process with Ctrl+Alt+Esc.

  1. sudo ipp-usb standalone -bg

Result: The printer is recognized. No matter if it was already pluged in before I have run this command in the terminal. Also it is no problem to close the terminal without the need of Ctrl+Alt+Esc.

So I guess either 3. or 4. is what I need.

Question 1: Which of these two variants (3 or 4) do need less resources in the background?

Question 2: What's the right way now to implement variant 3. or 4. ? Should I make an entry in "auto-start" with the command -sudo ipp-usb standalone -sudo ipp-usb standalone -bg

Question 3: What does the blue "!" on the print symbol mean (in "print settings") ? Print symbol It was not there, before I have printed. After the print this "!" has remained.

Thank you.

Golddouble commented 3 years ago

Other question: When I have run the following command: sudo ipp-usb standalone -bg

Then driverless printing is active and it works.

Problem: When I then start my VM (VirtualBox) I have no access to this printer. So I can not print in my VM. Question: How can I then deactivate my printer in the host? I am looking for something like the opposite of the command "sudo ipp-usb standalone -bg".

I have not found anything for this in man ipp-usb

There I have only found options to activate it, but not how to inactivate it.

Thank you.

Edit: If there is another way to free up the printer for the VM, then I am also open for that solution.