1 files changed, 25 insertions, 0 deletions
diff --git a/src/pack.c b/src/pack.c
index 9e9e0ed..6c21c89 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -714,6 +714,31 @@ packcomp(const char *s, char **endp)
 	return head;
 }
 
+struct packinst *
+packdup(struct packinst *src)
+{
+	struct packinst *head = NULL, *tail = NULL, *p;
+
+	for (; src; src = src->next) {
+		p = malloc(sizeof(*p));
+		if (!p) {
+			packfree(head);
+			errno = ENOMEM;
+			return NULL;
+		}
+		p->next = NULL;
+		p->spec = src->spec;
+		p->rep = src->rep;
+		p->cur = src->cur;
+		if (tail)
+			tail->next = p;
+		else
+			head = p;
+		tail = p;
+	}
+	return head;
+}
+			
 void
 packfree(struct packinst *pi)
 {