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dominfo: make example more useful

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The example currently assumes that a NULL URI will open Xen and thus
also assumes that a domain with ID 0 exists. Change it to require the
URI and a domain name as command line arguments.

Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-04-02 10:58:33 +01:00
parent 54fd8d5e52
commit b69e14fed6
1 changed files with 14 additions and 11 deletions
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25
examples/dominfo/info1.c
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@ -13,40 +13,39 @@
/**
* getDomainInfo:
* @id: the id of the domain
* @name: the name of the domain
*
* extract the domain 0 information
*/
static void
getDomainInfo(int id)
getDomainInfo(const char *uri, const char *name)
{
virConnectPtr conn = NULL; /* the hypervisor connection */
virDomainPtr dom = NULL; /* the domain being checked */
virDomainInfo info; /* the information being fetched */
int ret;
/* NULL means connect to local Xen hypervisor */
conn = virConnectOpenReadOnly(NULL);
conn = virConnectOpenReadOnly(uri);
if (conn == NULL) {
fprintf(stderr, "Failed to connect to hypervisor\n");
goto error;
}
/* Find the domain of the given id */
dom = virDomainLookupByID(conn, id);
/* Find the domain of the given name */
dom = virDomainLookupByName(conn, name);
if (dom == NULL) {
fprintf(stderr, "Failed to find Domain %d\n", id);
fprintf(stderr, "Failed to find Domain %s\n", name);
goto error;
}
/* Get the information */
ret = virDomainGetInfo(dom, &info);
if (ret < 0) {
fprintf(stderr, "Failed to get information for Domain %d\n", id);
fprintf(stderr, "Failed to get information for Domain %s\n", name);
goto error;
}
printf("Domains %d: %d CPUs\n", id, info.nrVirtCpu);
printf("Domain %s: %d CPUs\n", name, info.nrVirtCpu);
error:
if (dom != NULL)
@ -55,9 +54,13 @@ getDomainInfo(int id)
virConnectClose(conn);
}
int main()
int main(int argc, char **argv)
{
getDomainInfo(0);
if (argc != 3) {
fprintf(stderr, "syntax: %s: URI NAME\n", argv[0]);
return 1;
}
getDomainInfo(argv[1], argv[2]);
return 0;
}