On 7/25/05, Greg KH <[EMAIL PROTECTED]> wrote: > On Mon, Jul 25, 2005 at 12:30:43PM -0400, Jon Smirl wrote: > > On 7/25/05, Dmitry Torokhov <[EMAIL PROTECTED]> wrote: > > > On 7/25/05, Jon Smirl <[EMAIL PROTECTED]> wrote: > > > > On 7/25/05, Dmitry Torokhov <[EMAIL PROTECTED]> wrote: > > > > > On Sunday 24 July 2005 23:09, Jon Smirl wrote: > > > > > > I just pulled from GIT to test bind/unbind. I couldn't get it to > > > > > > work; > > > > > > it isn't taking into account the CR on the end of the input value of > > > > > > the sysfs attribute. This patch will fix it but I'm sure there is a > > > > > > cleaner solution. > > > > > > > > > > > > > > > > "echo -n" should take care of this problem I think. > > > > > > > > That will work around it but I think we should fix it. Changing to > > > > strncmp() fixes most cases. > > > > > > > > - if (strcmp(name, dev->bus_id) == 0) > > > > + if (strncmp(name, dev->bus_id, strlen(dev->bus_id)) == 0) > > > > > > > > > > This will produce "interesting results" if you have both "blah-1" and > > > "blah-10" devices on the bus. > > Yes, not a good thing for USB devices specifically. > > > Then the better solution is to fix the generic attribute set code to > > strip leading and trailing white space. > > No, that might break other things as we have not been doing this from > day one. I'd rather just change these two places, if it's that big of a > deal. It was documented (in a lwn.net article) and the changelog entry, > that you should use "echo -n".
I didn't realize that echo was adding the CR, I thought that it always appeared on the end of a sysfs attribute set. So now I have to go add white space stripping to a dozen fbdev/drm sysfs attribute implementations. Given that the param is const I may have to allocate new buffers and copy. I also wonder how many other people have made the same mistake. Are you sure it would break other things? These are supposed to be text attributes, not binary ones. -- Jon Smirl [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
