Hi, in recent versions this was fixed by changing debug to 0 in
uvcdynctrl script:
http://sourceforge.net/p/libwebcam/code/ci/f1e631a4163beb926f25efa52e2c5b71128de345/

this will redirect log output to /dev/null

Regards,
Paulo

2015-11-06 13:54 GMT+00:00 Matti Kurkela <matti.kurk...@iki.fi>:
> If /var or /var/log is a separate filesystem, the udev rule for this can
> often run before that filesystem is mounted, causing the
> /var/log/uvcdynctrl-udev.log file to be "hidden" under the mountpoint -
> where it is also unreachable by logrotate and similar tools, and thus might
> grow forever until the root filesystem is full.
>
> One way to remove the unreachable file would be to reboot into single user
> mode - but there is an easier way: bind mount the root filesystem to some
> other location. Bind mounts ignore submounts, and thus make the files stuck
> under mount points accessible.
>
> Here's an example from my system:
>
> # ls -l /var/log/uvcdynctrl-udev.log
> -rw-r--r-- 1 root root 0 Nov 6 12:28 /var/log/uvcdynctrl-udev.log
>
> # mount --bind / /mnt
>
> # ls -l /mnt/var/log/uvcdynctrl-udev.log
> -rw-r--r-- 1 root root 97805 Nov 4 21:15 /mnt/var/log/uvcdynctrl-udev.log
>
> Apparently /lib/udev/uvcdynctrl and /lib/udev/rules.d/80-uvcdynctrl.rules
> are not marked as conffiles, so updates will overwrite any manual edits.
>
> A permanent workaround can be achieved by also overriding the udev rule to
> make it read the script from elsewhere, so the modified script won't be
> overwritten on updates:
>
> # sed -e '/^debug=/s/1/0/' < /lib/udev/uvcdynctrl >/etc/udev/uvcdynctrl
> # sed -e 's|/lib/udev/uvcdynctrl|/etc/udev/uvcdynctrl|' \
> < /lib/udev/rules.d/80-uvcdynctrl.rules \
>>
>> /etc/udev/rules.d/80-uvcdynctrl.rules
>
>
> A minimal patch would be to add a configuration file to the package, e.g.
> /etc/default/uvcdynctrl, and have the /lib/udev/uvcdynctrl read the value of
> the "debug" variable from there.
>
>
> --
> Matti.Kurkela (at) iki.fi (or welho.com)

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