On 03/10/2014 10:54 AM, Daniel P. Berrange wrote:
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@redhat.com> ---
+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;
No sub-second resolution? I suppose it's okay, although gnulib gives you functions to access and compare full timestamp resolution. ACK. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org