On 08/01/2016 12:08 PM, Christian Seiler wrote: > I've now isolated the problems and have a reproducer (attached) > and it has _nothing_ to do with SCM_CREDS, but with much more > basic functionality. > > Problem 1 (causing SIGLOST): > > When msg_name and msg_namelen are filled for a SOCK_STREAM AF_LOCAL > socket (maybe also other AF_LOCAL, didn't check) upon calling > recvmsg, SIGLOST is generated. After reading up on this a bit, it > appears to be that Hurd doesn't have peer names for anoymous > AF_LOCAL sockets (in contrast to Linux and kFreeBSD) - but even in > that case, I would've expected errno = EINVAL and not SIGLOST, so > this is definitely a bug.
Now reported as Debian Bug #833558 in pkg:libc0.3 (src:glibc). https://bugs.debian.org/833558 Also, see previous mail, upstream bug report: https://sourceware.org/bugzilla/show_bug.cgi?id=20444 > Problem 2: > > MSG_DONTWAIT is ignored for recvmsg, it always blocks (at least > when using AF_LOCK sockets). I've even tried to pre-fill the > msg_flags member with it (which you shouldn't need to do > according to POSIX, the flags argument should be enough), but > that also doesn't help. Now reported as Debian Bug #833557 in pkg:hurd. https://bugs.debian.org/833557 Would be great if these fixes could be applied. Thanks, Christian
