onewire_parser.c: Fix compiler warnings about string lengths

[rrdd] / plugin_manager.c

diff --git a/plugin_manager.c b/plugin_manager.c
index a645f4e61321ca01e8a922f139fea43bc42e237b..e13e01f7d11b8175c7b9e72eb1ce53f809a14e0f 100644 (file)
--- a/plugin_manager.c
+++ b/plugin_manager.c
@@ -1,8 +1,24 @@
+#include <stdlib.h>
 #include <dlfcn.h>
+#include <string.h>
+#include <libgen.h>
 
 #include "plugin_manager.h"
 #include "plugin.h"
 #include "debug.h"
+#include "version.h"
+#include "utils.h"
+
+static char *exec_path;
+
+int init_plugin_manager(const char *_exec_path)
+{
+       char *str = strdup(_exec_path);
+       exec_path = strdup(dirname(str));
+
+       free(str);
+       return 0;
+}
 
 int load_plugin(const char *path)
 {
@@ -22,6 +38,19 @@ int load_plugin(const char *path)
                goto out;
        }
 
+       if (!info->version) {
+               pr_err("Plugin %s version info missing\n", path);
+               ret = -1;
+               goto out;
+       }
+
+       if (strcmp(RRDD_VERSION, info->version)) {
+               pr_err("Plugin %s version mismatch, expected %s, got %s\n",
+                       path, RRDD_VERSION, info->version);
+               ret = -1;
+               goto out;
+       }
+
        if (!info->init) {
                pr_err("Plugin info structure has NULL .init callback\n");
                goto out;
@@ -37,3 +66,42 @@ out:
 
        return ret;
 }
+
+/*
+ * Try to load a parser plugin with file name matching some of the
+ * following candidates (%s being the requested name):
+ *
+ * "%s_parser.so"
+ * "./%s_parser.so"
+ * "<exec_path>/%s_parser.so"
+ */
+int load_parser_plugin(const char *name)
+{
+       char str[256], parser[] = "_parser.so";
+       int ret;
+
+       strncpy(str, name, sizeof(str));
+       str[sizeof(str) - 1] = '\0';
+       _strlcat(str, parser, sizeof(str));
+       ret = load_plugin(str);
+       if (!ret)
+               return 0;
+
+       strncpy(str, "./", sizeof(str));
+       str[sizeof(str) - 1] = '\0';
+       _strlcat(str, name, sizeof(str));
+       _strlcat(str, parser, sizeof(str));
+       ret = load_plugin(str);
+       if (!ret)
+               return 0;
+
+       if (!exec_path)
+               return 0;
+
+       strncpy(str, exec_path, sizeof(str));
+       str[sizeof(str) - 1] = '\0';
+       _strlcat(str, "/", sizeof(str));
+       _strlcat(str, name, sizeof(str));
+       _strlcat(str, parser, sizeof(str));
+       return load_plugin(str);
+}