Add a root-only test for today's lib/idcache.c fix.

* tests/ls/nameless-uid: New file.
* tests/ls/Makefile.am (TESTS): Add nameless-uid.
(TESTS_ENVIRONMENT): Add PERL to the list.

tests/ls/Makefile.am

@@ -21,6 +21,7 @@
 AUTOMAKE_OPTIONS = 1.2 gnits
 
 TESTS = \
+  nameless-uid \
   color-dtype-dir \
   stat-failed \
   stat-dtype \
@@ -33,4 +34,5 @@ TESTS_ENVIRONMENT = \
   top_srcdir=$(top_srcdir) \
   srcdir=$(srcdir) \
   PATH="$(VG_PATH_PREFIX)`pwd`/../../src$(PATH_SEPARATOR)$$PATH" \
+  PERL="$(PERL)" \
   PROG=ls

tests/ls/nameless-uid

@@ -0,0 +1,65 @@
+#!/bin/sh
+# Ensure that ls -l works on files with nameless uid and/or gid
+
+# Copyright (C) 2006 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 2 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  ls --version
+fi
+
+. $srcdir/../envvar-check
+. $srcdir/../lang-default
+PRIV_CHECK_ARG=require-root . $srcdir/../priv-check
+
+$PERL -e 1 > /dev/null 2>&1 || {
+  echo 1>&2 "$0: configure didn't find a usable version of Perl," \
+    "so can't run this test"
+  (exit 77); exit 77
+}
+
+nameless_uid=`$PERL -e 'foreach my $i (1000..16*1024) { getpwuid $i or (print "$i\n"), exit }'`
+
+if test x$nameless_uid = x; then
+  echo "$0: couldn't find a nameless UID" 1>&2
+  (exit 77); exit 77
+fi
+
+pwd=`pwd`
+t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
+trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0
+trap '(exit $?); exit $?' 1 2 13 15
+
+framework_failure=0
+mkdir -p $tmp || framework_failure=1
+cd $tmp || framework_failure=1
+
+touch f || framework_failure=1
+chown $nameless_uid f || framework_failure=1
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+fail=0
+
+set -- `ls -o f` || fail=1
+test $3 = $nameless_uid || fail=1
+
+(exit $fail); exit $fail