发布一段Ｃ代码，用于连接指定的KVM宿主机器，获得该宿主机器的配置信息，以及该主机上所有的虚拟主机列表、状态及配置信息：

#include
#include
#include

void ListDom(virConnectPtr conn)
{
char **inactiveDom;
virDomainPtr *allDom;
int nInActiveDoms = virConnectNumOfDefinedDomains(conn);
allDom = malloc(sizeof(virDomainPtr)* nInActiveDoms);
int i = 0;
char str[200];
virDomainInfo t;
if(nInActiveDoms != 0)
{
printf("inactive num: %d\n",nInActiveDoms);
inactiveDom = malloc(sizeof(char*) * (nInActiveDoms));
nInActiveDoms = virConnectListDefinedDomains(conn , inactiveDom , nInActiveDoms);
printf("numOfInactiveDom*************:%d\n", nInActiveDoms);

for(i=0 ; i {
printf("name:%s\n",inactiveDom[i]);
allDom[i] = virDomainLookupByName(conn , inactiveDom[i]);
virDomainGetUUIDString(allDom[i],str);
printf("uuid:%s | os:%s\n",str,virDomainGetOSType(allDom[i]));
virDomainGetInfo(allDom[i],&t);
printf("HostName:%s\n",virDomainGetName(allDom[i]));
printf("state:%d|maxmem:%d|memused:%d|cpunum:%d|cputime:%ld\n",t.state,t.maxMem,t.memory,t.nrVirtCpu,t.cpuTime);
}
}
}
void ListActiveDom(virConnectPtr conn)
{
int numOfActiveDom = virConnectNumOfDomains(conn);
int activeDom[numOfActiveDom];
virDomainPtr *allDomains;
virDomainInfo t;
int i ;
char str[200];
allDomains = malloc(sizeof(virDomainPtr)* numOfActiveDom);
numOfActiveDom = virConnectListDomains(conn , activeDom , numOfActiveDom);

printf("Active Dom: \n");
for(i=0 ; i printf("id:%d\n",activeDom[i]);
allDomains[i] = virDomainLookupByID(conn ,activeDom[i]); // ¨ id Domain
virDomainGetUUIDString(allDomains[i],str);
printf("uuid:%s | os:%s\n",str,virDomainGetOSType(allDomains[i]));
printf("HostName:%s\n",virDomainGetName(allDomains[i]));
virDomainGetInfo(allDomains[i],&t);
printf("state:%d|maxmem:%d|memused:%d|cpunum:%d|cputime:%ld\n",t.state,t.maxMem,t.memory,t.nrVirtCpu,t.cpuTime);
}
}
int main(int argc, char *argv[])
{
virConnectPtr conn;
char* caps;
virNodeInfo nodeinfo;
char str[200];
char *struuid[200];
int max = 0;
int i = 0;
virNodeMemoryStats *pMem;
int pN[100];
while(1)
{
printf("Input KVM Host:>");
gets(str);
printf("\n");
if(strcmp(str,"quit") == 0)
{
printf("Bye-Bye\n");
exit(0);
}
conn = virConnectOpen(str);
if (conn == NULL) {
fprintf(stderr, "Failed to open connection to qemu:///system\n");
continue;
}
caps = virConnectGetCapabilities(conn);
fprintf(stdout, "Capabilities:\n%s\n", caps);
free(caps);

printf("HostName: %s\n",virConnectGetHostname(conn));
fprintf(stdout, "Virtualization type: %s\n", virConnectGetType(conn));