1 files changed, 13 insertions, 2 deletions
diff --git a/src/modify.c b/src/modify.c
index 3632ec7..803fb75 100644
--- a/src/modify.c
+++ b/src/modify.c
@@ -4,7 +4,7 @@
 
 int
 modify (DISK * d, int n, char *name, char *type_guid, uint64_t start,
-        uint64_t end)
+        uint64_t end, char *part_guid)
 {
   GPT_headers h;
   GPT_entry e = { 0 };
@@ -17,7 +17,18 @@ modify (DISK * d, int n, char *name, char *type_guid, uint64_t start,
       exit (1);
     }
   printf ("guid=%s became=%s\n", type_guid, guid_to_a (e.type));
-  e.label = guid_random ();
+  if (part_guid)
+    {
+      if (a_to_guid (part_guid, &e.label))
+        {
+          fprintf (stderr, "Partition GUID %s was not parsed\n", part_guid);
+          exit (1);
+        }
+    }
+  else
+    {
+      e.label = guid_random ();
+    }
   e.start = start;
   e.end = end;