[Libguestfs] [PATCH 06/14] hivexsh: cd command: fix error handling

[Richard Jones]

The error behaviour of hivex_node_get_child is subtle, so the 'cd'
command wouldn't always report errors correctly.  This fixes it.
---
 hivex/hivexsh.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/hivex/hivexsh.c b/hivex/hivexsh.c
index ceb1153..39ca634 100644
--- a/hivex/hivexsh.c
+++ b/hivex/hivexsh.c
@@ -559,10 +559,14 @@ cmd_cd (char *path)
       continue;
     }
 
+    errno = 0;
     new_cwd = hivex_node_get_child (h, new_cwd, elem);
     if (new_cwd == 0) {
-      fprintf (stderr, _("hivexsh: cd: subkey '%s' not found\n"),
-               elem);
+      if (errno)
+        perror ("hivexsh: cd");
+      else
+        fprintf (stderr, _("hivexsh: cd: subkey '%s' not found\n"),
+                 elem);
       return -1;
     }
   }
-- 
1.6.5.2