lockfile.c: make lock_file return a meaningful errno on failurei

diff --git a/refs.h b/refs.h
index 09d3564116974c862f974bc9c86e7a409b1cb48d..64f25d99a35914e18851beef19fe29bbead3182a 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -82,6 +82,7 @@ extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct st
 /*
  * Lock the packed-refs file for writing.  Flags is passed to
  * hold_lock_file_for_update().  Return 0 on success.
+ * Errno is set to something meaningful on error.
  */
 extern int lock_packed_refs(int flags);