tests: do not fail on read-only root file system

* tests/touch/not-owner: Handle the case when the root file system is
mounted read-only.
Reported by Solar Designer.

diff --git a/tests/touch/not-owner b/tests/touch/not-owner
index 3dd8a80867432cc486091886d4cbdd13290f9ed0..9cfa026bbf44c2b8f0a091f52f2fb9ab5afee71f 100755 (executable)
--- a/tests/touch/not-owner
+++ b/tests/touch/not-owner
@@ -42,7 +42,10 @@ touch / > out 2>&1 && fail=1
 
 # On SunOS4, EPERM is `Not owner'.
 # On some *BSD systems it's `Operation not permitted'.
-for msg in 'Not owner' 'Operation not permitted' 'Permission denied'; do
+# On a system where root file system is mounted read-only
+# it's `Read-only file system'.
+for msg in 'Not owner' 'Operation not permitted' 'Permission denied' \
+           'Read-only file system'; do
   cat > exp <<EOF
 touch: setting times of \`/': $msg
 EOF