contrib/docker: add LD_PRELOAD wrapper to fopen/open/opendir syscalls

[collectd.git] / src / openvpn.c

diff --git a/src/openvpn.c b/src/openvpn.c
index 93c8f1b..50670c5 100644 (file)
--- a/src/openvpn.c
+++ b/src/openvpn.c
@@ -26,6 +26,7 @@
  **/
 
 #include "collectd.h"
+
 #include "common.h"
 #include "plugin.h"
 
@@ -95,16 +96,13 @@ static int openvpn_strsplit (char *string, char **fields, size_t size)
 } /* int openvpn_strsplit */
 
 /* dispatches number of users */
-static void numusers_submit (char *pinst, char *tinst, gauge_t value)
+static void numusers_submit (const char *pinst, const char *tinst,
+               gauge_t value)
 {
-       value_t values[1];
        value_list_t vl = VALUE_LIST_INIT;
 
-       values[0].gauge = value;
-
-       vl.values = values;
-       vl.values_len = STATIC_ARRAY_SIZE (values);
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+       vl.values = &(value_t) { .gauge = value };
+       vl.values_len = 1;
        sstrncpy (vl.plugin, "openvpn", sizeof (vl.plugin));
        sstrncpy (vl.type, "users", sizeof (vl.type));
        if (pinst != NULL)
@@ -115,14 +113,16 @@ static void numusers_submit (char *pinst, char *tinst, gauge_t value)
        plugin_dispatch_values (&vl);
 } /* void numusers_submit */
 
-/* dispatches stats about traffic (TCP or UDP) generated by the tunnel per single endpoint */
-static void iostats_submit (char *pinst, char *tinst, derive_t rx, derive_t tx)
+/* dispatches stats about traffic (TCP or UDP) generated by the tunnel
+ * per single endpoint */
+static void iostats_submit (const char *pinst, const char *tinst,
+               derive_t rx, derive_t tx)
 {
-       value_t values[2];
        value_list_t vl = VALUE_LIST_INIT;
-
-       values[0].derive = rx;
-       values[1].derive = tx;
+       value_t values[] = {
+    { .derive = rx },
+    { .derive = tx },
+  };
 
        /* NOTE ON THE NEW NAMING SCHEMA:
         *       using plugin_instance to identify each vpn config (and
@@ -132,7 +132,6 @@ static void iostats_submit (char *pinst, char *tinst, derive_t rx, derive_t tx)
 
        vl.values = values;
        vl.values_len = STATIC_ARRAY_SIZE (values);
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
        sstrncpy (vl.plugin, "openvpn", sizeof (vl.plugin));
        if (pinst != NULL)
                sstrncpy (vl.plugin_instance, pinst,
@@ -145,18 +144,17 @@ static void iostats_submit (char *pinst, char *tinst, derive_t rx, derive_t tx)
 } /* void traffic_submit */
 
 /* dispatches stats about data compression shown when in single mode */
-static void compression_submit (char *pinst, char *tinst,
+static void compression_submit (const char *pinst, const char *tinst,
                derive_t uncompressed, derive_t compressed)
 {
-       value_t values[2];
        value_list_t vl = VALUE_LIST_INIT;
-
-       values[0].derive = uncompressed;
-       values[1].derive = compressed;
+       value_t values[] = {
+    { .derive = uncompressed },
+    { .derive = compressed },
+  };
 
        vl.values = values;
        vl.values_len = STATIC_ARRAY_SIZE (values);
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
        sstrncpy (vl.plugin, "openvpn", sizeof (vl.plugin));
        if (pinst != NULL)
                sstrncpy (vl.plugin_instance, pinst,
@@ -168,7 +166,7 @@ static void compression_submit (char *pinst, char *tinst,
        plugin_dispatch_values (&vl);
 } /* void compression_submit */
 
-static int single_read (char *name, FILE *fh)
+static int single_read (const char *name, FILE *fh)
 {
        char buffer[1024];
        char *fields[4];
@@ -261,7 +259,7 @@ static int single_read (char *name, FILE *fh)
 } /* int single_read */
 
 /* for reading status version 1 */
-static int multi1_read (char *name, FILE *fh)
+static int multi1_read (const char *name, FILE *fh)
 {
        char buffer[1024];
        char *fields[10];
@@ -324,7 +322,7 @@ static int multi1_read (char *name, FILE *fh)
 } /* int multi1_read */
 
 /* for reading status version 2 */
-static int multi2_read (char *name, FILE *fh)
+static int multi2_read (const char *name, FILE *fh)
 {
        char buffer[1024];
        char *fields[10];
@@ -386,7 +384,7 @@ static int multi2_read (char *name, FILE *fh)
 } /* int multi2_read */
 
 /* for reading status version 3 */
-static int multi3_read (char *name, FILE *fh)
+static int multi3_read (const char *name, FILE *fh)
 {
        char buffer[1024];
        char *fields[15];
@@ -451,7 +449,7 @@ static int multi3_read (char *name, FILE *fh)
 } /* int multi3_read */
 
 /* for reading status version 4 */
-static int multi4_read (char *name, FILE *fh)
+static int multi4_read (const char *name, FILE *fh)
 {
        char buffer[1024];
        char *fields[11];
@@ -518,12 +516,15 @@ static int multi4_read (char *name, FILE *fh)
 static int openvpn_read (void)
 {
        FILE *fh;
-       int  i, read;
+       int  read;
 
        read = 0;
+       
+       if (vpn_num == 0)
+               return (0);
 
        /* call the right read function for every status entry in the list */
-       for (i = 0; i < vpn_num; i++)
+       for (int i = 0; i < vpn_num; i++)
        {
                int vpn_read = 0;
 
@@ -647,7 +648,7 @@ static int openvpn_config (const char *key, const char *value)
        if (strcasecmp ("StatusFile", key) == 0)
        {
                char    *status_file, *status_name, *filename;
-               int     status_version, i;
+               int     status_version;
                vpn_status_t *temp;
 
                /* try to detect the status file format */
@@ -655,8 +656,8 @@ static int openvpn_config (const char *key, const char *value)
 
                if (status_version == 0)
                {
-                       WARNING ("openvpn plugin: unable to detect status version, \
-                                       discarding status file \"%s\".", value);
+                       WARNING ("openvpn plugin: unable to detect status version, "
+                                       "discarding status file \"%s\".", value);
                        return (1);
                }
 
@@ -683,7 +684,7 @@ static int openvpn_config (const char *key, const char *value)
                }
 
                /* scan the list looking for a clone */
-               for (i = 0; i < vpn_num; i++)
+               for (int i = 0; i < vpn_num; i++)
                {
                        if (strcasecmp (vpn_list[i]->name, status_name) == 0)
                        {
@@ -696,7 +697,7 @@ static int openvpn_config (const char *key, const char *value)
                }
 
                /* create a new vpn element since file, version and name are ok */
-               temp = (vpn_status_t *) malloc (sizeof (vpn_status_t));
+               temp = malloc (sizeof (*temp));
                if (temp == NULL)
                {
                        char errbuf[1024];
@@ -709,17 +710,19 @@ static int openvpn_config (const char *key, const char *value)
                temp->version = status_version;
                temp->name = status_name;
 
-               vpn_list = (vpn_status_t **) realloc (vpn_list, (vpn_num + 1) * sizeof (vpn_status_t *));
-               if (vpn_list == NULL)
+               vpn_status_t **tmp_list = realloc (vpn_list, (vpn_num + 1) * sizeof (*vpn_list));
+               if (tmp_list == NULL)
                {
                        char errbuf[1024];
                        ERROR ("openvpn plugin: realloc failed: %s",
                                        sstrerror (errno, errbuf, sizeof (errbuf)));
 
+                       sfree (vpn_list);
                        sfree (temp->file);
                        sfree (temp);
                        return (1);
                }
+               vpn_list = tmp_list;
 
                vpn_list[vpn_num] = temp;
                vpn_num++;
@@ -772,9 +775,7 @@ static int openvpn_config (const char *key, const char *value)
 /* shutdown callback */
 static int openvpn_shutdown (void)
 {
-       int i;
-
-       for (i = 0; i < vpn_num; i++)
+       for (int i = 0; i < vpn_num; i++)
        {
                sfree (vpn_list[i]->file);
                sfree (vpn_list[i]);