[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Fix locking in tools/hotplug/Linux/locking.sh
On Mon, Nov 12, 2012 at 07:07:38PM +0100, Olaf Hering wrote: > On Mon, Nov 12, Ian Campbell wrote: > > > On Fri, 2012-11-09 at 13:56 +0000, Jacek Konieczny wrote: > > > The claim_lock() function would fail in the perl code with: > > > > > > Invalid argument at -e line 2. > > > > > > because the Perl snippet opens for reading the file descriptor, which > > > was earlier opened for write (append). > > > > Looks plausible to me. > > > > How does this interact with the > > eval "exec $_lockfd<&-" > > which Olaf added in 26079:b3b03536789a ? I suppose close is close and > > <&- and >&- or even <>&- are equivalent? > > I did not see the perl error, in what environment did you notice this > error? Xen 4.2.0 # uname -rm 3.6.6-aos4 x86_64 # perl --version This is perl, v5.8.8 built for x86_64-pld-linux-thread-multi I find it a bit strange that it seems to work for everybody else that me, but the source of my error seems obvious (opening write-only file descriptor for reading). I guess my perl, for some reason, does something more when using open() on an existing file descriptor. Greets, Jacek _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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