[ostree] core: Work around libguestfs/FUSE issue with setuid binaries

[Colin Walters <walters src gnome org>]

commit 74b2c7aab357e6d5c5a9e5ace777c6991dac2638
Author: Colin Walters <walters verbum org>
Date:   Fri Jul 26 14:48:15 2013 -0400

    core: Work around libguestfs/FUSE issue with setuid binaries
    
    For some reason, the setuid bits are being stripped.  This
    workaround is enough for now.

 src/libostree/ostree-core.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/src/libostree/ostree-core.c b/src/libostree/ostree-core.c
index ef9595d..8a98937 100644
--- a/src/libostree/ostree-core.c
+++ b/src/libostree/ostree-core.c
@@ -1245,6 +1245,16 @@ ostree_create_file_from_input (GFile            *dest_file,
 
       if (!g_output_stream_close ((GOutputStream*)out, NULL, error))
         goto out;
+
+      /* Work around libguestfs/FUSE bug */
+      if (mode & (S_ISUID|S_ISGID))
+        {
+          if (chmod (dest_path, mode) == -1)
+            {
+              ot_util_set_error_from_errno (error, errno);
+              goto out;
+            }
+        }
     }
   else if (S_ISLNK (mode))
     {