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64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/**
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* section: Informations
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* synopsis: Extract informations about Xen domain 0
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* purpose: Demonstrate the basic use of the library to connect to the
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* hypervisor and extract domain informations.
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* usage: info1
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* test: info1
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* author: Daniel Veillard
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* copy: see Copyright for the status of this software.
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*/
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#include <stdio.h>
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#include <libvirt/libvirt.h>
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/**
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* getDomainInfo:
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* @id: the id of the domain
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*
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* extract the domain 0 informations
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*/
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static void
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getDomainInfo(int id) {
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virConnectPtr conn = NULL; /* the hypervisor connection */
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virDomainPtr dom = NULL; /* the domain being checked */
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virDomainInfo info; /* the informations being fetched */
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int ret;
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/* NULL means connect to local Xen hypervisor */
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conn = virConnectOpenReadOnly(NULL);
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if (conn == NULL) {
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fprintf(stderr, "Failed to connect to hypervisor\n");
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goto error;
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}
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/* Find the domain of the given id */
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dom = virDomainLookupByID(conn, id);
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if (dom == NULL) {
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fprintf(stderr, "Failed to find Domain %d\n", id);
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goto error;
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}
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/* Get the informations */
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ret = virDomainGetInfo(dom, &info);
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if (ret < 0) {
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fprintf(stderr, "Failed to get informations for Domain %d\n", id);
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goto error;
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}
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printf("Domains %d: %d CPUs\n", id, info.nrVirtCpu);
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error:
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if (dom != NULL)
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virDomainFree(dom);
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if (conn != NULL)
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virConnectClose(conn);
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}
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int main() {
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getDomainInfo(0);
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return(0);
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}
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