FYI... On 12/11/2012 06:15 PM, alex alex wrote: > Here is the patch; > > --- syscall1.c 2012-12-11 18:08:31.000000000 +0100 > +++ syscall.c 2012-12-11 13:48:24.000000000 +0100 > @@ -2498,7 +2498,7 @@ > &tv, sizeof(tv))) > return -EFAULT; > } > - if (err > 0) > + if (err >= 0) > for (i = 0; i < XNSELECT_MAX_TYPES; i++) > if (ufd_sets[i] > && __xn_copy_to_user((void __user *) ufd_sets[i], > > 2012/12/11 alex alex <[email protected]> > >> Tested. It seems to work! >> Thank you. >> I add the patch... >> >> >> >> 2012/12/11 alex alex <[email protected]> >> >>> I made the changes and I'm recompiling the kernel, so it takes a little >>> time ... >>> I'll let you know as soon as I know if it works. >>> >>> >>> 2012/12/11 Gilles Chanteperdrix <[email protected]> >>> >>>> On 12/11/2012 03:07 PM, alex alex wrote: >>>>> Hi, >>>>> >>>>> >>>>> The problem is the following: >>>>> >>>>> >>>>> When the timeout interval expires of the “select” function the return >>>> value >>>>> of FD_ISSET(fdr,&readfds) is 1 whereas it should be 0. >>>>> >>>>> In ksrc/skins/posix/syscall.c we can see that they are not copy to >>>>> userspace of select return value in case of timeout. >>>>> >>>>> >>>>> >>>>> The attached code shows this bug with the use of a rtdm driver. >>>> >>>> So, could you try making the obvious change in the code? Or do you need >>>> me to send you the patch? >>>> >>>> -- >>>> Gilles. >>>> >>> >>> >> > _______________________________________________ > Xenomai mailing list > [email protected] > http://www.xenomai.org/mailman/listinfo/xenomai
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