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V10lator
Apprentice
Joined: 11 Jul 2004
Posts: 207
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 Posted: Thu Feb 21, 2013 7:54 am Post subject: Wrong device permissions |
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First let me tell you a bit so you better understand the problem:
Some time ago I changed from openRC to systemD. Before you ask: No, I won't change back.
Now I got a new gamepad, connected it and... experienced wrong permissions of device nodes. According to this thread I have to be in the uinput group, but that's wrong/outdated, the device is made for root:root with 600:
| Code: | $ ls -l /dev/uinput
crw------- 1 root root 10, 223 21. Feb 08:23 /dev/uinput |
Looking at udev rules it should be 640:
| Code: | $ grep uinput /lib/udev/rules.d/*
/lib/udev/rules.d/50-udev-default.rules:SUBSYSTEM=="input", KERNEL=="ts[0-9]*|uinput", MODE="0640" |
But this is still wrong, I have to change it to 666 to be able to run xboxdrv as a regular user (being in the uinput group). Of course I have to do this after every reboot.
If you think that's all you are wrong. After starting xboxdrv I need to change two more permissions before I can use the device: /dev/input/event6 (for force-feedback) and /dev/input/js0:
| Code: | $ ls -l /dev/input/event6 /dev/input/js0
crw-r----- 1 root root 13, 70 21. Feb 08:44 /dev/input/event6
crw-r--r-- 1 root root 13, 0 21. Feb 08:44 /dev/input/js0 |
At least they are what udev rules tell they should be:
| Code: | $ grep event /lib/udev/rules.d/* | grep MODE
/lib/udev/rules.d/50-udev-default.rules:SUBSYSTEM=="input", KERNEL=="mouse*|mice|event*", MODE="0640"
$ grep js /lib/udev/rules.d/* | grep MODE
/lib/udev/rules.d/50-udev-default.rules:SUBSYSTEM=="input", KERNEL=="js[0-9]*", MODE="0644" |
Now I wonder if the problem is in udev, ConsoleKit or systemD. Please help. |
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ulenrich
Veteran
Joined: 10 Oct 2010
Posts: 1483
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| Posted: Thu Feb 21, 2013 1:43 pm Post subject: Re: Wrong device permissions |
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| V10lator wrote: | | I have to do this after every reboot. |
Why don't you
cp /lib/udev/rules.d/50-udev-default.rules /etc/udev/rules.d/50-udev-default.rules
edit /etc/udev/rules.d/50-udev-default.rules
You own rules file at /etc/udev/rules.d should over rule the distribution rules file as long as it has the exact same name. That is what /etc is about: Its your root-administrator playground. |
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V10lator
Apprentice
Joined: 11 Jul 2004
Posts: 207
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| Posted: Thu Feb 21, 2013 1:50 pm Post subject: |
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And what exactly to change there when it seems to get ignored anyway?
//EDIT: Just to confirm that it's ignored I did what you told and changed the input handling:
| Code: | # input
SUBSYSTEM=="input", ENV{ID_INPUT}=="", IMPORT{builtin}="input_id"
SUBSYSTEM=="input", KERNEL=="mouse*|mice", MODE="0640"
SUBSYSTEM=="input", KERNEL=="event*", MODE="0666"
SUBSYSTEM=="input", KERNEL=="ts[0-9]*|uinput", GROUP="uinput", MODE="0660"
SUBSYSTEM=="input", KERNEL=="js[0-9]*", MODE="0666" |
Curiously the uinput change is ignored:
| Code: | $ ls -l /dev/uinput
crw------- 1 root root 10, 223 21. Feb 14:57 /dev/uinput |
While the event/js change seems to work:
| Code: | $ ls -l /dev/input/event6 /dev/input/js0
crw-rw-rw- 1 root root 13, 70 21. Feb 15:00 /dev/input/event6
crw-rw-rw- 1 root root 13, 0 21. Feb 15:00 /dev/input/js0 |
Last edited by V10lator on Thu Feb 21, 2013 2:01 pm; edited 1 time in total |
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PaulBredbury
Watchman
Joined: 14 Jul 2005
Posts: 7310
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| Posted: Thu Feb 21, 2013 1:59 pm Post subject: |
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So create a udev rule that works. Google "udev debugging".
To get you started:
| Code: | | udevadm info -a --name /dev/uinput |
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V10lator
Apprentice
Joined: 11 Jul 2004
Posts: 207
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| Posted: Thu Feb 21, 2013 2:06 pm Post subject: |
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| PaulBredbury wrote: | To get you started:
| Code: | | udevadm info -a --name /dev/uinput |
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Thanks a lot! /dev/uinput is a subsystem of misc, not input. That fixed it! 
I guess this is a bug, but is it a gentoo or upstream bug? Also I'm curious if there are better solutions available and/or if the whole thing is a bug (a joystick should work out of the box, shouldn't it?). |
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ulenrich
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Joined: 10 Oct 2010
Posts: 1483
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| Posted: Fri Feb 22, 2013 2:04 pm Post subject: |
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If you get help you are supposed to help:
https://bugs.gentoo.org
... if you have reason to think you have found a bug.
Developers are not that often gamers. Joysticks might have been forgotten at some point ... |
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V10lator
Apprentice
Joined: 11 Jul 2004
Posts: 207
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| Posted: Fri Feb 22, 2013 2:18 pm Post subject: |
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| ulenrich wrote: | | If you get help you are supposed to help |
Sure, but I don't want to annoy gentoo devs with upstream bugs, that's why I asked if anybody knows if this is a gentoo or a upstream bug.  |
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