From a6b16a6cff7593df26deed0f5c861ff12299b0d5 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@huhu.verplant.org>
Date: Fri, 4 May 2007 09:24:07 +0200
Subject: [PATCH] src/plugin.c: Copy the data-sets before inserting them in the
 list.

Thus memory management is done by `plugin.c' and overwritten DSes can be freed.
---
 src/plugin.c     | 46 +++++++++++++++++++++++++++++++++++++++++++---
 src/types_list.c |  5 +++--
 2 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/src/plugin.c b/src/plugin.c
index 495e1693..ee1240cb 100644
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -417,7 +417,32 @@ int plugin_register_shutdown (char *name,
 
 int plugin_register_data_set (const data_set_t *ds)
 {
-	return (register_callback (&list_data_set, ds->type, (void *) ds));
+	data_set_t *ds_copy;
+	int i;
+
+	if (llist_search (list_data_set, ds->type) != NULL)
+	{
+		NOTICE ("Replacing DS `%s' with another version.", ds->type);
+		plugin_unregister_data_set (ds->type);
+	}
+
+	ds_copy = (data_set_t *) malloc (sizeof (data_set_t));
+	if (ds_copy == NULL)
+		return (-1);
+	memcpy(ds_copy, ds, sizeof (data_set_t));
+
+	ds_copy->ds = (data_source_t *) malloc (sizeof (data_source_t)
+			* ds->ds_num);
+	if (ds_copy->ds == NULL)
+	{
+		free (ds_copy);
+		return (-1);
+	}
+
+	for (i = 0; i < ds->ds_num; i++)
+		memcpy (ds_copy->ds + i, ds->ds + i, sizeof (data_source_t));
+
+	return (register_callback (&list_data_set, ds->type, (void *) ds_copy));
 } /* int plugin_register_data_set */
 
 int plugin_register_log (char *name,
@@ -465,8 +490,23 @@ int plugin_unregister_shutdown (const char *name)
 
 int plugin_unregister_data_set (const char *name)
 {
-	return (plugin_unregister (list_data_set, name));
-}
+	llentry_t  *e;
+	data_set_t *ds;
+
+	e = llist_search (list_data_set, name);
+
+	if (e == NULL)
+		return (-1);
+
+	llist_remove (list_data_set, e);
+	ds = (data_set_t *) e->value;
+	llentry_destroy (e);
+
+	sfree (ds->ds);
+	sfree (ds);
+
+	return (0);
+} /* int plugin_unregister_data_set */
 
 int plugin_unregister_log (const char *name)
 {
diff --git a/src/types_list.c b/src/types_list.c
index 6fce0190..3963897e 100644
--- a/src/types_list.c
+++ b/src/types_list.c
@@ -129,8 +129,9 @@ static void parse_line (char *buf, size_t buf_len)
       ds->type, ds->ds_num, (void *) ds->ds);
 
   plugin_register_data_set (ds);
-  /* Do NOT free `ds' and `ds->ds', because it's NOT copied by
-   * `plugin_register_data_set'!. */
+
+  sfree (ds->ds);
+  sfree (ds);
 } /* void parse_line */
 
 static void parse_file (FILE *fh)
-- 
2.30.2