bug#16940: [PATCH] tests: Do not access /dev/tty if it does not exist

[Cyril Roelandt]

* tests/misc/nohup.sh: Do not try to access /dev/tty if it does not exist. This
  happens on GNU Guix, for instance.
---
 tests/misc/nohup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/misc/nohup.sh b/tests/misc/nohup.sh
index 6d2b515..e331eab 100755
--- a/tests/misc/nohup.sh
+++ b/tests/misc/nohup.sh
@@ -61,7 +61,7 @@ rm -f nohup.out err
 
 # Bug present through coreutils 8.0: failure to print advisory message
 # to stderr must be fatal.  Requires stdout to be terminal.
-if test -w /dev/full && test -c /dev/full; then
+if test -w /dev/full && test -c /dev/full && test -f /dev/tty; then
 (
   exec >/dev/tty
   test -t 1 || exit 0
-- 
1.9.0