[sane-devel] As instructed by /etc/udev/rules.d/libsane.rules
jsmeix at suse.de
Tue Nov 17 14:42:16 UTC 2009
On Nov 17 12:42 Julien BLACHE wrote (shortened):
> Johannes Meixner <jsmeix at suse.de> wrote:
>> What the heck has udev libsane.rules to do
>> with a particular kernel minor version number?
> That was a change in the USB layer in the kernel that needed a
> new/modified udev rule to create the device nodes.
Perhaps you misunderstood me.
I meant it as an example to show which awkward workarounds are needed
to make this thingy hopefully work for a litte bit of time (until the
next incompatible change happens out of a sudden).
> Now remember that the same people that brought you that unstable,
> ever-changing, ever-breaking USB stack are the same people who started
> and led udev for a while. Oh, and that little thing called
> "stable-api-nonsense.txt", too.
This cannot be never ever true.
Of course as he writes totally clearly in "stable-api-nonsense.txt"
there must be a syscall interface for USB which "is _very_ stable
over time, and will not break" - otherwise the kernel simply has
no userspace USB support because "the kernel to userspace interface
is the one that application programs use, the syscall interface".
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