tests: test today's ls-vs-capability fix

Test for this fix: f3f1ccfd87.
* tests/Makefile.am (TESTS): Add ls/no-cap.
* tests/ls/no-cap: New file.

tests/Makefile.am

@@ -327,6 +327,7 @@ TESTS =						\
   ls/inode					\
   ls/m-option					\
   ls/no-arg					\
+  ls/no-cap					\
   ls/proc-selinux-segfault			\
   ls/recursive					\
   ls/rt-1					\

tests/ls/no-cap

@@ -0,0 +1,37 @@
+#!/bin/sh
+# ensure that an empty "ca=" attribute disables ls's capability-checking
+
+# Copyright (C) 2008 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  ls --version
+fi
+
+. $srcdir/test-lib.sh
+require_strace_ capget
+
+fail=0
+strace -e capget ls --color=always > /dev/null 2> out || fail=1
+$EGREP 'capget\(' out || skip_test_ "your ls doesn't call capget"
+
+rm -f out
+eval "$(TERM=xterm dircolors -b | sed 's/ca=[^:]*:/ca=:/' | tee /t/k-env)"
+strace -e capget ls --color=always > /dev/null 2> out || fail=1
+
+$EGREP 'capget\(' out && fail=1
+
+Exit $fail