On Jul 20 17:37, Yaakov (Cygwin/X) wrote: > On Wed, 2011-07-20 at 17:46 +0200, Corinna Vinschen wrote: > > On Jul 20 03:11, Yaakov (Cygwin/X) wrote: > > > On Linux, ioctl(2) returns several different errors[1]: > > > > > > EBADF d is not a valid descriptor. > > > EFAULT argp references an inaccessible memory area. > > > EINVAL Request or argp is not valid. > > > ENOTTY d is not associated with a character special device. > > > ENOTTY The specified request does not apply to the kind of object that > > > the descriptor d references. > > > > > > In the case of FIONREAD, Cygwin doesn't seem to distinguish between > > > EINVAL and ENOTTY, and this causes at least one major bug: > > > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35536 > > > > > > I have patched GCJ and GNU classpath to work around it, but this really > > > needs to be fixed in Cygwin itself. > > > > Would this patch be sufficient? > > > > Index: fhandler.cc > > =================================================================== > > RCS file: /cvs/src/src/winsup/cygwin/fhandler.cc,v > > retrieving revision 1.397 > > diff -u -p -r1.397 fhandler.cc > > --- fhandler.cc 5 Jul 2011 12:02:10 -0000 1.397 > > +++ fhandler.cc 20 Jul 2011 15:46:40 -0000 > > @@ -1151,6 +1151,10 @@ fhandler_base::ioctl (unsigned int cmd, > > set_nonblocking (*(int *) buf); > > res = 0; > > break; > > + case FIONREAD: > > + set_errno (ENOTTY); > > + res = -1; > > + break; > > default: > > set_errno (EINVAL); > > res = -1; > > Given my testcases, give me a few days to check this out.
Ok, but the patch doesn't build as is. You have to add #include <asm/socket.h> to get the FIONREAD definition. Sorry about that. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
