Hi,
I'm trying to set up NUT (UPS tools) on Alpine 3.8. I've compiled from
edge and that stage seems to have worked fine.
The device is an EATON Ellipse ECO 800 UPS which uses USB for
communicating with Alpine. I've therefore also installed eudev to
manage to USB permissions.
However, I can't get it to communicate.
I've added the UPS to ups.conf:
[eaton]
driver = usbhid-ups
port = auto
vendorid=0463
desc = "Eaton UPS"
But when I try to start it, I get errors. Running a strace on the driver:
strace /usr/lib/nut/usbhid-ups -a eaton
results in (amongst other messages):
stat("/sys/bus/usb/devices", 0x7639e69ffe80) = -1 EACCES
(Permission denied)
Checking permissions with:
ls -ld /sys/bus/usb/devices
drwx------ 2 root root 0 Jul 24 19:41
/sys/bus/usb/devices/
In fact, it is 0600 root:root all the way up to /sys/bus.
Shouldn't this be 0644 or similar, or maybe 0640 but with group 'usb'?
Kind regards,
Gareth Williams
---
Unsubscribe: alpine-user+unsubscribe@lists.alpinelinux.org
Help: alpine-user+help@lists.alpinelinux.org
---
To answer my own question and hopefully save someone else asking it:
The driver can't read /sys/bus and sub-directories because I had a
hardened kernel installed and these kernels have the
CONFIG_GRKERNSEC_SYSFS_RESTRICT config option enabled which disables
read access to the whole /sys tree. Changing the kernel to
linux-vanilla fixed it.
Kind regards,
Gareth
On 25/07/2018 07:50, Gareth Williams wrote:
> Hi,
>
> I'm trying to set up NUT (UPS tools) on Alpine 3.8. I've compiled
> from edge and that stage seems to have worked fine.
>
> The device is an EATON Ellipse ECO 800 UPS which uses USB for
> communicating with Alpine. I've therefore also installed eudev to
> manage to USB permissions.
>
> However, I can't get it to communicate.
>
> I've added the UPS to ups.conf:
>
> [eaton]
> driver = usbhid-ups
> port = auto
> vendorid=0463
> desc = "Eaton UPS"
>
> But when I try to start it, I get errors. Running a strace on the
> driver:
>
> strace /usr/lib/nut/usbhid-ups -a eaton
>
> results in (amongst other messages):
>
> stat("/sys/bus/usb/devices", 0x7639e69ffe80) = -1 EACCES
> (Permission denied)
>
> Checking permissions with:
>
> ls -ld /sys/bus/usb/devices
>
> drwx------ 2 root root 0 Jul 24 19:41
> /sys/bus/usb/devices/
>
> In fact, it is 0600 root:root all the way up to /sys/bus.
>
> Shouldn't this be 0644 or similar, or maybe 0640 but with group 'usb'?
>
> Kind regards,
>
> Gareth Williams
>
---
Unsubscribe: alpine-user+unsubscribe@lists.alpinelinux.org
Help: alpine-user+help@lists.alpinelinux.org
---