[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] libxl: spawning qemu while files are open
On Fri, 2013-10-18 at 15:26 +0000, Rob Hoes wrote: > We could solve this by opening the suspend-image file in xenopsd using > the O_CLOEXEC flag, causing the file to be closed when executing qemu. > However, we are worried that this behaviour may still cause trouble in > multi-threaded programs such as xenopsd, unless all files it ever > opens are opened with O_CLOEXEC, which is easily forgotten. I'm afraid this is exactly what you need to do. libxl itself jumps through considerable hoops to ensure it does this itself, it's extra hard in a library... (have a look= for CLOEXEC in tools/libxl/*.h for some details) xenopsd being the consuming app should have an easier time of it. > Would it be possible for libxl to spawn qemu in such a way that it > won't inherit open files? I don't think POSIX has any functionality which allows for that to be reliably implemented. Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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