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11ea62665c
The Windows printf functions don't support %llu/%lld for printing 64-bit integers. For most of libvirt this doesn't matter as we rely on gnulib which provides a replacement printf that is sane. The example code is designed to compile against the normal OS headers, with no use of gnulib and thus has to use the platform specific printf. To deal with this we must use the macros PRI* macros from inttypes.h to get the platform specific format string. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <inttypes.h>
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#include <libvirt/libvirt-admin.h>
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static const char *
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exampleTransportToString(int transport)
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{
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const char *str = NULL;
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switch ((virClientTransport) transport) {
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case VIR_CLIENT_TRANS_UNIX:
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str = "unix";
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break;
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case VIR_CLIENT_TRANS_TCP:
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str = "tcp";
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break;
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case VIR_CLIENT_TRANS_TLS:
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str = "tls";
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break;
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}
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return str ? str : "unknown";
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}
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static char *
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exampleGetTimeStr(time_t then)
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{
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char *ret = NULL;
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struct tm timeinfo;
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struct tm *timeinfop;
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/* localtime_r() is smarter, but since mingw lacks it and this
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* example is single-threaded, we can get away with localtime */
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if (!(timeinfop = localtime(&then)))
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return NULL;
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timeinfo = *timeinfop;
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if (!(ret = calloc(64, sizeof(char))))
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return NULL;
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if (strftime(ret, 64, "%Y-%m-%d %H:%M:%S%z",
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&timeinfo) == 0) {
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free(ret);
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return NULL;
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}
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return ret;
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}
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int main(int argc, char **argv)
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{
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int ret = -1;
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virAdmConnectPtr conn = NULL;
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virAdmServerPtr srv = NULL; /* which server list the clients from */
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virAdmClientPtr *clients = NULL; /* where to store the servers */
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ssize_t i = 0;
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int count = 0;
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if (argc != 2) {
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fprintf(stderr, "One argument specifying the server to list connected "
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"clients for is expected\n");
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return -1;
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}
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/* first, open a connection to the daemon */
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if (!(conn = virAdmConnectOpen(NULL, 0)))
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return -1;
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/* first a virAdmServerPtr handle is necessary to obtain, that is done by
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* doing a lookup for specific server, let's get a handle on "libvirtd"
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* server
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*/
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if (!(srv = virAdmConnectLookupServer(conn, argv[1], 0)))
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goto cleanup;
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/* now get the currently connected clients to server @srv */
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if ((count = virAdmServerListClients(srv, &clients, 0)) < 0)
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goto cleanup;
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/* let's print the currently connected clients and some basic info about
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* them, we have 2 options how to interate over the returned list,
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* use @count as the boundary or use the fact that @clients are guaranteed
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* to contain 1 extra element NULL;
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* this example uses the first option
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*/
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printf(" %-5s %-15s %-15s\n%s\n", "Id", "Transport", "Connected since",
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"--------------------------------------------------");
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for (i = 0; i < count; i++) {
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virAdmClientPtr client = clients[i];
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unsigned long long id = virAdmClientGetID(client);
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int transport = virAdmClientGetTransport(client);
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char * timestr = NULL;
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if (!(timestr =
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exampleGetTimeStr(virAdmClientGetTimestamp(client))))
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goto cleanup;
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printf(" %-5" PRIu64 " %-15s %-15s\n", (uint64_t)id,
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exampleTransportToString(transport), timestr);
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free(timestr);
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}
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ret = 0;
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cleanup:
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/* Once finished, free the list of clients, free the server handle and
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* close the connection properly, @conn will be deallocated automatically
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*/
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for (i = 0; i < count; i++)
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virAdmClientFree(clients[i]);
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free(clients);
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virAdmServerFree(srv);
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virAdmConnectClose(conn);
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return ret;
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}
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