On 5/21/09, Andreas Robinson <andr345@xxxxxxxxx> wrote:
> On Thu, 2009-05-21 at 12:33 +0100, Alan Jenkins wrote:
>> On 5/21/09, Andreas Robinson <andr345@xxxxxxxxx> wrote:
>> >
>> > error("Could not read '%s': %s\n",
>> > mod->filename, strerror(errno));
>>
>>
>> This will change the error message to something less helpful. You
>> should probably use insert_moderror() instead of strerror().
>
> I'm not so sure about that. strerror(ENOEXEC) == "Exec format error",
> and while I agree it is less clear than "invalid module format", it is
> exactly the right message for this kind of error. I.e we're trying to
> load an executable but it really isn't => Exec format error. It is
> simply seen less often than say, "File not found".
Yeah, I didn't say it was actually wrong.
> To use insert_moderror(), the message would have to be formatted like
> this:
>
> error("Could not read '%s': %s\n", mod->filename,
> (errno == ENOEXEC) ? insert_moderror(errno) : strerror(errno));
>
> Though this is probably better:
>
> error("Could not read '%s': %s\n", mod->filename,
> (errno == ENOEXEC) ? "invalid module format" : strerror(errno));
>
> since insert_moderror() is written explicitly for init_module().
>
> If it isn't done like that, we would get insert_moderror(ENOENT) ==
> "Unknown symbol in module, or unknown parameter (see dmesg)" which
> clearly isn't the "File not found" we're expecting.
Agreed, that would be very wrong. The second version above looks good.
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