openvpn plugin: Some small cleanups.

diff --git a/src/openvpn.c b/src/openvpn.c
index 16d4502..c79ccb7 100644 (file)
--- a/src/openvpn.c
+++ b/src/openvpn.c
@@ -25,7 +25,10 @@
 #include "common.h"
 #include "plugin.h"
 
-static char *status_file = "/etc/openvpn/openvpn-status.log";
+#define DEFAULT_STATUS_FILE "/etc/openvpn/openvpn-status.log"
+#define CLIENT_LIST_PREFIX  "CLIENT_LIST,"
+
+static char *status_file = NULL;
 
 static const char *config_keys[] =
 {
@@ -68,7 +71,7 @@ static void openvpn_submit (char *name, counter_t rx, counter_t tx)
        vl.time = time (NULL);
        sstrncpy (vl.host, hostname_g, sizeof (vl.host));
        sstrncpy (vl.plugin, "openvpn", sizeof (vl.plugin));
-       sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
+       sstrncpy (vl.plugin_instance, name, sizeof (vl.plugin_instance));
        sstrncpy (vl.type, "if_octets", sizeof (vl.type));
 
        plugin_dispatch_values (&vl);
@@ -80,12 +83,13 @@ static int openvpn_read (void)
        counter_t rx, tx;
        FILE *fh;
        char buffer[1024];
-       char *fields[8];
-       const int max_fields = sizeof(fields)/sizeof(fields[0]);
+       char *fields[10];
+       const int max_fields = STATIC_ARRAY_SIZE (fields);
        int   fields_num;
-       static const char *prefix = "CLIENT_LIST,";
 
-       fh = fopen (status_file, "r");
+       fh = fopen ((status_file != NULL)
+                       ? status_file
+                       : DEFAULT_STATUS_FILE, "r");
        if (fh == NULL)
                return (-1);
 
@@ -95,16 +99,16 @@ static int openvpn_read (void)
          */
        while (fgets (buffer, sizeof (buffer), fh) != NULL)
        {
-               if (strncmp(buffer, prefix, strlen(prefix)) != 0)
-               {
+               if (strncmp (buffer, CLIENT_LIST_PREFIX,
+                                       strlen (CLIENT_LIST_PREFIX)) != 0)
                        continue;
-               }
 
+               /* The line we're expecting has 8 fields. We ignore all lines
+                * with more or less fields. */
                fields_num = openvpn_strsplit (buffer, fields, max_fields);
-               if (fields_num != max_fields)
-               {
+               if (fields_num != 8)
                        continue;
-               }
+
                name =      fields[1];  /* "Common Name" */
                rx = atoll (fields[4]); /* "Bytes Received */
                tx = atoll (fields[5]); /* "Bytes Sent" */
@@ -119,7 +123,8 @@ static int openvpn_config (const char *key, const char *value)
 {
        if (strcasecmp ("StatusFile", key) == 0)
        {
-               status_file = strdup(value);
+               sfree (status_file);
+               status_file = sstrdup (value);
        }
        else
        {