ping plugin: Fail if no hosts was pinged.

diff --git a/src/ping.c b/src/ping.c
index 6dcd9ec..89fecc8 100644 (file)
--- a/src/ping.c
+++ b/src/ping.c
@@ -75,14 +75,16 @@ static void add_hosts (void)
        hl_prev = NULL;
        while (hl_this != NULL)
        {
-               DEBUG ("host = %s, wait_left = %i, wait_time = %i, next = %p",
-                               hl_this->host, hl_this->wait_left, hl_this->wait_time, (void *) hl_this->next);
+               DEBUG ("ping plugin: host = %s, wait_left = %i, "
+                               "wait_time = %i, next = %p",
+                               hl_this->host, hl_this->wait_left,
+                               hl_this->wait_time, (void *) hl_this->next);
 
                if (hl_this->wait_left <= 0)
                {
                        if (ping_host_add (pingobj, hl_this->host) == 0)
                        {
-                               DEBUG ("Successfully added host %s", hl_this->host);
+                               DEBUG ("ping plugin: Successfully added host %s", hl_this->host);
                                /* Remove the host from the linked list */
                                if (hl_prev != NULL)
                                        hl_prev->next = hl_this->next;
@@ -94,6 +96,7 @@ static void add_hosts (void)
                        }
                        else
                        {
+                               DEBUG ("ping plugin: Failed adding host `%s'", hl_this->host);
                                hl_this->wait_left = hl_this->wait_time;
                                hl_this->wait_time *= 2;
                                if (hl_this->wait_time > 86400)
@@ -204,6 +207,7 @@ static int ping_read (void)
        char   host[512];
        double latency;
        size_t buf_len;
+       int    number_of_hosts;
 
        if (pingobj == NULL)
                return (-1);
@@ -218,6 +222,7 @@ static int ping_read (void)
                return (-1);
        }
 
+       number_of_hosts = 0;
        for (iter = ping_iterator_get (pingobj);
                        iter != NULL;
                        iter = ping_iterator_next (iter))
@@ -232,11 +237,12 @@ static int ping_read (void)
                                        &latency, &buf_len))
                        continue;
 
-               DEBUG ("host = %s, latency = %f", host, latency);
+               DEBUG ("ping plugin: host = %s, latency = %f", host, latency);
                ping_submit (host, latency);
+               number_of_hosts++;
        }
 
-       return (0);
+       return (number_of_hosts == 0 ? -1 : 0);
 } /* int ping_read */
 
 void module_register (modreg_e load)