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

[collectd.git] / src / powerdns.c

diff --git a/src/powerdns.c b/src/powerdns.c
index 1c41ff8..b5d4a32 100644 (file)
--- a/src/powerdns.c
+++ b/src/powerdns.c
@@ -25,9 +25,9 @@
  **/
 
 #include "collectd.h"
+
 #include "common.h"
 #include "plugin.h"
-#include "configfile.h"
 #include "utils_llist.h"
 
 #include <sys/stat.h>
@@ -43,6 +43,7 @@
 # define UNIX_PATH_MAX sizeof (((struct sockaddr_un *)0)->sun_path)
 #endif
 #define FUNC_ERROR(func) do { char errbuf[1024]; ERROR ("powerdns plugin: %s failed: %s", func, sstrerror (errno, errbuf, sizeof (errbuf))); } while (0)
+#define SOCK_ERROR(func, sockpath) do { char errbuf[1024]; ERROR ("powerdns plugin: Socket `%s` %s failed: %s", sockpath, func, sstrerror (errno, errbuf, sizeof (errbuf))); } while (0)
 
 #define SERVER_SOCKET  LOCALSTATEDIR"/run/pdns.controlsocket"
 #define SERVER_COMMAND "SHOW * \n"
@@ -50,7 +51,7 @@
 #define RECURSOR_SOCKET  LOCALSTATEDIR"/run/pdns_recursor.controlsocket"
 #define RECURSOR_COMMAND "get noerror-answers nxdomain-answers " \
   "servfail-answers sys-msec user-msec qa-latency cache-entries cache-hits " \
-  "cache-misses questions\n"
+  "cache-misses questions \n"
 
 struct list_item_s;
 typedef struct list_item_s list_item_t;
@@ -300,10 +301,10 @@ static char *local_sockpath = NULL;
 
 /* <https://doc.powerdns.com/md/recursor/stats/> */
 static void submit (const char *plugin_instance, /* {{{ */
-    const char *pdns_type, const char *value)
+    const char *pdns_type, const char *value_str)
 {
   value_list_t vl = VALUE_LIST_INIT;
-  value_t values[1];
+  value_t value;
 
   const char *type = NULL;
   const char *type_instance = NULL;
@@ -318,7 +319,7 @@ static void submit (const char *plugin_instance, /* {{{ */
   if (i >= lookup_table_length)
   {
     INFO ("powerdns plugin: submit: Not found in lookup table: %s = %s;",
-        pdns_type, value);
+        pdns_type, value_str);
     return;
   }
 
@@ -345,16 +346,15 @@ static void submit (const char *plugin_instance, /* {{{ */
     return;
   }
 
-  if (0 != parse_value (value, &values[0], ds->ds[0].type))
+  if (0 != parse_value (value_str, &value, ds->ds[0].type))
   {
     ERROR ("powerdns plugin: Cannot convert `%s' "
-        "to a number.", value);
+        "to a number.", value_str);
     return;
   }
 
-  vl.values = values;
+  vl.values = &value;
   vl.values_len = 1;
-  sstrncpy (vl.host, hostname_g, sizeof (vl.host));
   sstrncpy (vl.plugin, "powerdns", sizeof (vl.plugin));
   sstrncpy (vl.type, type, sizeof (vl.type));
   if (type_instance != NULL)
@@ -375,9 +375,8 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
   char *buffer = NULL;
   size_t buffer_size = 0;
 
-  struct sockaddr_un sa_unix;
+  struct sockaddr_un sa_unix = { 0 };
 
-  struct timeval stv_timeout;
   cdtime_t cdt_timeout;
 
   sd = socket (PF_UNIX, item->socktype, 0);
@@ -387,7 +386,6 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
     return (-1);
   }
 
-  memset (&sa_unix, 0, sizeof (sa_unix));
   sa_unix.sun_family = AF_UNIX;
   sstrncpy (sa_unix.sun_path,
       (local_sockpath != NULL) ? local_sockpath : PDNS_LOCAL_SOCKPATH,
@@ -396,7 +394,7 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
   status = unlink (sa_unix.sun_path);
   if ((status != 0) && (errno != ENOENT))
   {
-    FUNC_ERROR ("unlink");
+    SOCK_ERROR ("unlink", sa_unix.sun_path);
     close (sd);
     return (-1);
   }
@@ -408,7 +406,7 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
     status = bind (sd, (struct sockaddr *) &sa_unix, sizeof (sa_unix));
     if (status != 0)
     {
-      FUNC_ERROR ("bind");
+      SOCK_ERROR ("bind", sa_unix.sun_path);
       break;
     }
 
@@ -416,7 +414,7 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
     status = chmod (sa_unix.sun_path, 0666);
     if (status != 0)
     {
-      FUNC_ERROR ("chmod");
+      SOCK_ERROR ("chmod", sa_unix.sun_path);
       break;
     }
 
@@ -424,12 +422,12 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
     if (cdt_timeout < TIME_T_TO_CDTIME_T (2))
       cdt_timeout = TIME_T_TO_CDTIME_T (2);
 
-    CDTIME_T_TO_TIMEVAL (cdt_timeout, &stv_timeout);
-
-    status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO, &stv_timeout, sizeof (stv_timeout));
+    status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO,
+                         &CDTIME_T_TO_TIMEVAL(cdt_timeout),
+                         sizeof(struct timeval));
     if (status != 0)
     {
-      FUNC_ERROR ("setsockopt");
+      SOCK_ERROR ("setsockopt", sa_unix.sun_path);
       break;
     }
 
@@ -437,21 +435,21 @@ static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
         sizeof (item->sockaddr));
     if (status != 0)
     {
-      FUNC_ERROR ("connect");
+      SOCK_ERROR ("connect", sa_unix.sun_path);
       break;
     }
 
     status = send (sd, item->command, strlen (item->command), 0);
     if (status < 0)
     {
-      FUNC_ERROR ("send");
+      SOCK_ERROR ("send", sa_unix.sun_path);
       break;
     }
 
     status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
     if (status < 0)
     {
-      FUNC_ERROR ("recv");
+      SOCK_ERROR ("recv", sa_unix.sun_path);
       break;
     }
     buffer_size = status + 1;
@@ -514,7 +512,7 @@ static int powerdns_get_data_stream (list_item_t *item, /* {{{ */
       sizeof (item->sockaddr));
   if (status != 0)
   {
-    FUNC_ERROR ("connect");
+    SOCK_ERROR ("connect", item->sockaddr.sun_path);
     close (sd);
     return (-1);
   }
@@ -524,7 +522,7 @@ static int powerdns_get_data_stream (list_item_t *item, /* {{{ */
       /* flags = */ 0);
   if (status < 0)
   {
-    FUNC_ERROR ("send");
+    SOCK_ERROR ("send", item->sockaddr.sun_path);
     close (sd);
     return (-1);
   }
@@ -536,13 +534,13 @@ static int powerdns_get_data_stream (list_item_t *item, /* {{{ */
     status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
     if (status < 0)
     {
-      FUNC_ERROR ("recv");
+      SOCK_ERROR ("recv", item->sockaddr.sun_path);
       break;
     }
     else if (status == 0)
       break;
 
-    buffer_new = (char *) realloc (buffer, buffer_size + status + 1);
+    buffer_new = realloc (buffer, buffer_size + status + 1);
     if (buffer_new == NULL)
     {
       FUNC_ERROR ("realloc");
@@ -631,8 +629,6 @@ static int powerdns_read_server (list_item_t *item) /* {{{ */
   saveptr = NULL;
   while ((key = strtok_r (dummy, ",", &saveptr)) != NULL)
   {
-    int i;
-
     dummy = NULL;
 
     value = strchr (key, '=');
@@ -646,6 +642,7 @@ static int powerdns_read_server (list_item_t *item) /* {{{ */
       continue;
 
     /* Check if this item was requested. */
+    int i;
     for (i = 0; i < fields_num; i++)
       if (strcasecmp (key, fields[i]) == 0)
        break;
@@ -781,7 +778,6 @@ static int powerdns_read_recursor (list_item_t *item) /* {{{ */
 static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
     oconfig_item_t *ci)
 {
-  int i;
   char **temp;
 
   if (ci->values_num < 1)
@@ -791,7 +787,7 @@ static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
     return (-1);
   }
 
-  for (i = 0; i < ci->values_num; i++)
+  for (int i = 0; i < ci->values_num; i++)
     if (ci->values[i].type != OCONFIG_TYPE_STRING)
     {
       WARNING ("powerdns plugin: Only string arguments are allowed to "
@@ -799,7 +795,7 @@ static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
       return (-1);
     }
 
-  temp = (char **) realloc (li->fields,
+  temp = realloc (li->fields,
       sizeof (char *) * (li->fields_num + ci->values_num));
   if (temp == NULL)
   {
@@ -808,7 +804,7 @@ static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
   }
   li->fields = temp;
 
-  for (i = 0; i < ci->values_num; i++)
+  for (int i = 0; i < ci->values_num; i++)
   {
     li->fields[li->fields_num] = strdup (ci->values[i].value.string);
     if (li->fields[li->fields_num] == NULL)
@@ -831,7 +827,6 @@ static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
 
   list_item_t *item;
   int status;
-  int i;
 
   if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
   {
@@ -880,7 +875,7 @@ static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
   }
 
   status = 0;
-  for (i = 0; i < ci->children_num; i++)
+  for (int i = 0; i < ci->children_num; i++)
   {
     oconfig_item_t *option = ci->children + i;
 
@@ -940,8 +935,6 @@ static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
 
 static int powerdns_config (oconfig_item_t *ci) /* {{{ */
 {
-  int i;
-
   DEBUG ("powerdns plugin: powerdns_config (ci = %p);", (void *) ci);
 
   if (list == NULL)
@@ -955,7 +948,7 @@ static int powerdns_config (oconfig_item_t *ci) /* {{{ */
     }
   }
 
-  for (i = 0; i < ci->children_num; i++)
+  for (int i = 0; i < ci->children_num; i++)
   {
     oconfig_item_t *option = ci->children + i;
 
@@ -988,9 +981,7 @@ static int powerdns_config (oconfig_item_t *ci) /* {{{ */
 
 static int powerdns_read (void)
 {
-  llentry_t *e;
-
-  for (e = llist_head (list); e != NULL; e = e->next)
+  for (llentry_t *e = llist_head (list); e != NULL; e = e->next)
   {
     list_item_t *item = e->value;
     item->func (item);
@@ -1001,12 +992,10 @@ static int powerdns_read (void)
 
 static int powerdns_shutdown (void)
 {
-  llentry_t *e;
-
   if (list == NULL)
     return (0);
 
-  for (e = llist_head (list); e != NULL; e = e->next)
+  for (llentry_t *e = llist_head (list); e != NULL; e = e->next)
   {
     list_item_t *item = (list_item_t *) e->value;
     e->value = NULL;