Add a comment explaining (probably) why this

test fails on OpenBSD 3.2 when run in an NFS-mounted directory.

diff --git a/tests/chgrp/basic b/tests/chgrp/basic
index de43573ba60e5fc3ce7742a2bbc7847d6c29c6d0..fc4eb5a1c5f771b57ecc917e7d6071c1758050bd 100755 (executable)
--- a/tests/chgrp/basic
+++ b/tests/chgrp/basic
@@ -81,6 +81,11 @@ test "$VERBOSE" = yes && set +x
   chgrp $g2 g
   sleep 1
   chgrp $g1 f
+
+  # The following no-change chgrp command is supposed to update f's ctime,
+  # but on OpenBSD, it appears to be a no-op for some file system types
+  # (at least NFS) so g's ctime is more recent.  This is not a big deal;
+  # this test works fine when the files are on a local file system (/tmp).
   chgrp '' f
   ls -c -t f g