Re: [libvirt] [PATCH 5/7] lxc: avoid large stacks with veth creation

* src/lxc/veth.h (vethCreate): Change prototype. * src/lxc/veth.c (vethCreate): Always malloc veth2, and allocate veth1 if needed. (getFreeVethName): Adjust signature, and use virAsprintf. * src/lxc/lxc_driver.c (lxcSetupInterfaces): Adjust caller. --- This issue crossed file boundaries.  It was a bit tricky, since vethCreate was used in two patterns - one where the parent name was already known, and another where the parent name is picked as the first available option.  But the end result avoids strdup'ing a fixed-width buffer, and I think I correctly avoided any leaks (in lxcSetupInterfaces, once a string is transferred to *veths, then returning failure will cause that string to be freed in the caller). It also gets rid of a PATH_MAX stack over-allocation.