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libtest.c
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libtest.c
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#include <netinet/in.h>
#include <inttypes.h>
#include "libcman.h"
#include <stdlib.h>
#include <stdio.h>
static void cman_callback(cman_handle_t handle, void *private, int reason, int arg)
{
printf("callback called reason = %d, arg=%d\n", reason, arg);
}
static void confchg_callback(cman_handle_t handle, void *private,
unsigned int *member_list, int member_list_entries,
unsigned int *left_list, int left_list_entries,
unsigned int *joined_list, int joined_list_entries)
{
int i;
printf("Confchg callback\n");
printf("member_list: %d entries:\n", member_list_entries);
for (i=0; i<member_list_entries; i++)
printf(" %d\n", member_list[i]);
printf("left_list: %d entries:\n", left_list_entries);
for (i=0; i<left_list_entries; i++)
printf(" %d\n", left_list[i]);
printf("joined_list: %d entries:\n", joined_list_entries);
for (i=0; i<joined_list_entries; i++)
printf(" %d\n", joined_list[i]);
}
static void print_node(cman_node_t *node)
{
printf(" node id %d\n", node->cn_nodeid);
printf(" node member %d\n", node->cn_member);
printf(" node name %s\n", node->cn_name);
printf(" node incarn %d\n", node->cn_incarnation);
printf("\n");
}
int main()
{
cman_handle_t h;
int num;
int retnodes;
cman_node_t *nodes;
cman_version_t ver;
cman_cluster_t clinfo;
h = cman_init(0);
if (!h)
{
perror("cman_init failed");
exit(1);
}
num = cman_get_node_count(h);
if (num > 0)
printf("cluster has %d nodes\n", num);
else
perror("node count");
printf("cman is active: %d\n", cman_is_active(h));
printf("cman is quorate: %d\n", cman_is_quorate(h));
printf("cman is listening: %d\n", cman_is_listening(h, CMAN_NODEID_US, 1)); /* membership! */
cman_get_version(h, &ver);
printf("cman version %d.%d.%d (config %d)\n",
ver.cv_minor,
ver.cv_major,
ver.cv_patch,
ver.cv_config);
if (!cman_get_cluster(h, &clinfo))
{
printf("Cluster '%s', number %d\n", clinfo.ci_name, clinfo.ci_number);
}
else
perror("cluster info failed");
nodes = malloc(num * sizeof(cman_node_t));
if (!nodes)
{
perror("malloc");
exit(1);
}
if (!cman_get_nodes(h, num, &retnodes, nodes))
{
int i;
printf("Getting all nodes:\n");
for (i=0; i<retnodes; i++)
print_node(&nodes[i]);
}
else
{
perror("get_nodes failed");
}
// Need to clear this.
// Who wrote this rubbish? oh, I did.
nodes[0].cn_name[0] = '\0';
if (!cman_get_node(h, CMAN_NODEID_US, &nodes[0]))
{
printf("Getting our info:\n");
print_node(&nodes[0]);
}
else
{
perror("get_node failed");
}
if (cman_start_notification(h, cman_callback))
{
perror("start_notification");
}
if (cman_start_confchg(h, confchg_callback))
{
perror("start_confchg");
}
while (1) {
int ret = cman_dispatch(h, CMAN_DISPATCH_BLOCKING | CMAN_DISPATCH_ALL);
if (ret == -1) {
perror("cman_dispatch");
break;
}
}
cman_finish(h);
return 0;
}

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