Re: [libvirt] [PATCH v2 1/3] Add helper APIs to track if libvirtd or loadable modules have changed

The future QEMU capabilities cache needs to be able to invalidate itself if the libvirtd binary or any loadable modules are changed on disk. Record the 'ctime' value for these binaries and provide helper APIs to query it. This approach assumes that if libvirt.so is changed, then libvirtd will also change, which should usually be the case with libtool's wrapper scripts that cause libvirtd to get re-linked Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; ---

+void virUpdateSelfLastChanged(const char *path) +{ + struct stat sb; + + if (stat(path, &sb) < 0) + return; + + if (sb.st_ctime > selfLastChanged) { + VIR_DEBUG("Setting self last changed to %lld for '%s'", + (long long)sb.st_ctime, path); + selfLastChanged = sb.st_ctime;