X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fplugin.c;h=91c40b6bad115203cb021f95bd919583310c9460;hb=ab6ab6ad6428ba0a0987a20a7d1cfa47d6cc6f8b;hp=9ecee5cf26f5fd1b2d421d0d69a3f6476a0815b0;hpb=4dc9287f4de0283ae986444377075dcbdada2871;p=collectd.git

diff --git a/src/plugin.c b/src/plugin.c
index 9ecee5cf..91c40b6b 100644
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -280,8 +280,6 @@ static int plugin_load_file (char *file, uint32_t flags)
 	lt_dlhandle dlh;
 	void (*reg_handle) (void);
 
-	DEBUG ("file = %s", file);
-
 	lt_dlinit ();
 	lt_dlerror (); /* clear errors */
 
@@ -297,23 +295,35 @@ static int plugin_load_file (char *file, uint32_t flags)
 	}
 #else /* if LIBTOOL_VERSION == 1 */
 	if (flags & PLUGIN_FLAGS_GLOBAL)
-		ERROR ("plugin_load_file: The global flag is not supported, "
+		WARNING ("plugin_load_file: The global flag is not supported, "
 				"libtool 2 is required for this.");
 	dlh = lt_dlopen (file);
 #endif
 
 	if (dlh == NULL)
 	{
-		const char *error = lt_dlerror ();
+		char errbuf[1024] = "";
+
+		ssnprintf (errbuf, sizeof (errbuf),
+				"lt_dlopen (\"%s\") failed: %s. "
+				"The most common cause for this problem are "
+				"missing dependencies. Use ldd(1) to check "
+				"the dependencies of the plugin "
+				"/ shared object.",
+				file, lt_dlerror ());
+
+		ERROR ("%s", errbuf);
+		/* Make sure this is printed to STDERR in any case, but also
+		 * make sure it's printed only once. */
+		if (list_log != NULL)
+			fprintf (stderr, "ERROR: %s\n", errbuf);
 
-		ERROR ("lt_dlopen (%s) failed: %s", file, error);
-		fprintf (stderr, "lt_dlopen (%s) failed: %s\n", file, error);
 		return (1);
 	}
 
 	if ((reg_handle = (void (*) (void)) lt_dlsym (dlh, "module_register")) == NULL)
 	{
-		WARNING ("Couldn't find symbol `module_register' in `%s': %s\n",
+		WARNING ("Couldn't find symbol \"module_register\" in \"%s\": %s\n",
 				file, lt_dlerror ());
 		lt_dlclose (dlh);
 		return (-1);
@@ -862,7 +872,7 @@ int plugin_register_missing (const char *name,
 				(void *) callback, ud));
 } /* int plugin_register_missing */
 
-int plugin_register_shutdown (char *name,
+int plugin_register_shutdown (const char *name,
 		int (*callback) (void))
 {
 	return (create_register_callback (&list_shutdown, name,
@@ -1413,7 +1423,8 @@ int plugin_dispatch_values (value_list_t *vl)
 	if ((vl == NULL) || (vl->type[0] == 0)
 			|| (vl->values == NULL) || (vl->values_len < 1))
 	{
-		ERROR ("plugin_dispatch_values: Invalid value list.");
+		ERROR ("plugin_dispatch_values: Invalid value list "
+				"from plugin %s.", vl->plugin);
 		return (-1);
 	}
 
@@ -1575,6 +1586,52 @@ int plugin_dispatch_values (value_list_t *vl)
 	return (0);
 } /* int plugin_dispatch_values */
 
+int plugin_dispatch_values_secure (const value_list_t *vl)
+{
+  value_list_t vl_copy;
+  int status;
+
+  if (vl == NULL)
+    return EINVAL;
+
+  memcpy (&vl_copy, vl, sizeof (vl_copy));
+
+  /* Write callbacks must not change the values and meta pointers, so we can
+   * savely skip copying those and make this more efficient. */
+  if ((pre_cache_chain == NULL) && (post_cache_chain == NULL))
+    return (plugin_dispatch_values (&vl_copy));
+
+  /* Set pointers to NULL, just to be on the save side. */
+  vl_copy.values = NULL;
+  vl_copy.meta = NULL;
+
+  vl_copy.values = malloc (sizeof (*vl_copy.values) * vl->values_len);
+  if (vl_copy.values == NULL)
+  {
+    ERROR ("plugin_dispatch_values_secure: malloc failed.");
+    return (ENOMEM);
+  }
+  memcpy (vl_copy.values, vl->values, sizeof (*vl_copy.values) * vl->values_len);
+
+  if (vl->meta != NULL)
+  {
+    vl_copy.meta = meta_data_clone (vl->meta);
+    if (vl_copy.meta == NULL)
+    {
+      ERROR ("plugin_dispatch_values_secure: meta_data_clone failed.");
+      free (vl_copy.values);
+      return (ENOMEM);
+    }
+  } /* if (vl->meta) */
+
+  status = plugin_dispatch_values (&vl_copy);
+
+  meta_data_destroy (vl_copy.meta);
+  free (vl_copy.values);
+
+  return (status);
+} /* int plugin_dispatch_values_secure */
+
 int plugin_dispatch_notification (const notification_t *notif)
 {
 	llentry_t *le;