1,virConnectGetLibVersion
API call obtain the version of libvirt software in use on the host
it takes a connection pointer and unsigned long pointer as input,
2,virConnectGetVersion
API call obtain version of the host virtualization software in use
3,virConnectGetURI
API call obtain URI current connection
4,virConnectIsEncrypted
API call 判断以建立的virtualizationHypervisors 是否是加密的
5,virConnectIsSecure
API call 同上判断virtual conn 是否加密
if succesful returns 1 for a secure connection and 0 for an insecure connection
if an error occurred -1 will be returned;
6,libvirt Enevt loop integration;
libvirt APIs use a basic request/response architecture that is generally synchronous
libvirt application calls a libvirt API (the request) which doesn‘t return until the action is complete (the response)
a libvirtd server can also generate asynchronous messages and send them
to
the libvirt application
libvirt 基于C API基本使用案例,布布扣,bubuko.com
原文：http://www.cnblogs.com/ruiy/p/libAPI.html