X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Futils_llist.c;h=bf5f7e4944e335c6660eb0226cd8d43faa9aa2a8;hb=d86f194b902781efbc5b9b80bca7a6a3254a2dc4;hp=f7e03c239b9889d4f62ecb62ae34488c868de2eb;hpb=f46cf590f7e0a25fe5f826b762766f39e1f3a1f6;p=collectd.git

diff --git a/src/utils_llist.c b/src/utils_llist.c
index f7e03c23..bf5f7e49 100644
--- a/src/utils_llist.c
+++ b/src/utils_llist.c
@@ -59,6 +59,9 @@ void llist_destroy (llist_t *l)
 	llentry_t *e_this;
 	llentry_t *e_next;
 
+	if (l == NULL)
+		return;
+
 	for (e_this = l->head; e_this != NULL; e_this = e_next)
 	{
 		e_next = e_this->next;
@@ -106,6 +109,10 @@ void llist_prepend (llist_t *l, llentry_t *e)
 {
 	e->next = l->head;
 	l->head = e;
+
+	if (l->tail == NULL)
+		l->tail = e;
+
 	++(l->size);
 }
 
@@ -136,6 +143,9 @@ llentry_t *llist_search (llist_t *l, const char *key)
 {
 	llentry_t *e;
 
+	if (l == NULL)
+		return (NULL);
+
 	for (e = l->head; e != NULL; e = e->next)
 		if (strcmp (key, e->key) == 0)
 			break;
@@ -145,10 +155,14 @@ llentry_t *llist_search (llist_t *l, const char *key)
 
 llentry_t *llist_head (llist_t *l)
 {
+	if (l == NULL)
+		return (NULL);
 	return (l->head);
 }
 
 llentry_t *llist_tail (llist_t *l)
 {
+	if (l == NULL)
+		return (NULL);
 	return (l->tail);
 }