List /etc instead of /, but only if it exists and is readable.

testsuite/longdir.test

@@ -17,7 +17,11 @@ longdir="$fromdir/$longname/$longname/$longname"
 makepath "$longdir" || test_skipped "unable to create long directory"
 touch "$longdir/1" || test_skipped "unable to create files in long directory"
 date > "$longdir/1"
-ls -la / > "$longdir/2"
+if [ -r /etc ]; then
+    ls -la /etc >"$longdir/2"
+else
+    ls -la / >"$longdir/2"
+fi
 checkit "$RSYNC --delete -avH \"$fromdir/\" \"$todir\"" "$fromdir/" "$todir"
 
 # The script would have aborted on error, so getting here means we've won.