hivex_root: Return errno == HIVEX_NO_KEY when root key is missing.

Previously we returned errno == ENOKEY.  However this was an
unfortunate choice of error code since it is not defined in POSIX.  As
a result it is missing on several platforms.

HIVEX_NO_KEY is defined as ENOKEY on platforms where this symbol
exists (thus maintaining backwards ABI compatibility), and defined as
another POSIX error code otherwise.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/hivex.c b/lib/hivex.c
index 7715520..d042f4f 100644
--- a/lib/hivex.c
+++ b/lib/hivex.c
@@ -559,7 +559,7 @@ hivex_root (hive_h *h)
 {
   hive_node_h ret = h->rootoffs;
   if (!IS_VALID_BLOCK (h, ret)) {
-    errno = ENOKEY;
+    errno = HIVEX_NO_KEY;
     return 0;
   }
   return ret;