Hello Till,
Sorry for the delay. While testing the applied patch in fresh Ubuntu
15.04 machine, the issue seems to be half fixed and can be still
reproduced. After comparing the setup with old Ubuntu system, I found
that, while debugging I added RUN{builtin}+="uaccess" entry in
56-hpmud.rules file, which I forgot to remove while testing shebang
changes and hence I could see permissions getting reflected immediately
and ipp queue getting created immediately and therefore I thought that
issue is fixed. I am really sorry about that. Basically there were two
problems related to system-configure-printer.
ISSUE1: udev-add-printer script cannot be launched from udev-configure-
printer process (as python process throws an error "unknown option -")
and hence automatic print queues are not added. Provided patch is
correct and fixes this issue. Anyway I am providing the test code (in
the attached file) using which this issue could be reproduced.
ISSUE2: Not yet fixed. Need to write proper udev rules for the programs that
create daemons. I have explained the issue properly in the attached file.
systemd-udevd worker process hangs for about 3 minutes and hence
1) Setting permissions to device node in /dev directory is delayed by 3
minutes.
2) udev-add-printer process remains in Zombie state for about 3 minutes as
parent process does not read its exit value
3) ippusbxd daemon (which is forked from ippusbxd main process before
returning ipp port) is terminated after 3 minutes, and hence ipp uri becomes
unusable as there is no daemon listening to ipp requests.
I could not spend more time to test the proposed fix (i.e using TAG+=
"systemd", ENV{SYSTEMD-WANTED}="configure-printer@.service" and then
writing proper service file etc etc.) due to lack of time. Please check
if you can reproduce the issue non IPP usb printer and also please let
me know if you need any other information regarding this issue.
Thanks,
Sanjay
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https://bugs.launchpad.net/bugs/1455212
Title:
IPP-over-USB support broken
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