new/adjusted tests to accompany fixed fts.c

[Jim Meyering]

I've just fixed a bug in gnulib's fts.c:
  http://article.gmane.org/gmane.comp.lib.gnulib.bugs/7806
Note that it affects users of fts that enable FTS_CWDFD mode.
AFAIK, coreutils is the only package that does that.
Here are some corresponding changes for coreutils:

        du would exit early, when encountering an inaccessible directory
        Reported by Mike Frysinger, in
        http://article.gmane.org/gmane.comp.gnu.core-utils.bugs/8831
        * tests/du/inacc-dest: New test, based on an example from Mike 
Frysinger.
        * tests/chgrp/no-x: Remove the "fts_read failed: ..."
        diagnostic from the expected output when using native fdopendir.
        * tests/chmod/no-x: Likewise.
        * tests/du/no-x: Likewise.

diff --git a/tests/chgrp/no-x b/tests/chgrp/no-x
index b8ebed5..e9c702d 100755
--- a/tests/chgrp/no-x
+++ b/tests/chgrp/no-x
@@ -59,7 +59,6 @@ EOF
 # With native fdopendir, du uses a different code path.
 cat <<\EOF > exp-native-fdopendir
 chgrp: cannot access `d/no-x/y': Permission denied
-chgrp: fts_read failed: Permission denied
 EOF

 if cmp out exp >/dev/null 2>&1; then
diff --git a/tests/chmod/no-x b/tests/chmod/no-x
index b8eed34..34b3952 100755
--- a/tests/chmod/no-x
+++ b/tests/chmod/no-x
@@ -55,7 +55,6 @@ EOF
 # With native fdopendir, du uses a different code path.
 cat <<\EOF > exp-native-fdopendir
 chmod: cannot access `d/no-x/y': Permission denied
-chmod: fts_read failed: Permission denied
 EOF

 if cmp out exp >/dev/null 2>&1; then
diff --git a/tests/du/inacc-dest b/tests/du/inacc-dest
new file mode 100755
index 0000000..b8bc5ac
--- /dev/null
+++ b/tests/du/inacc-dest
@@ -0,0 +1,82 @@
+#!/bin/sh
+# Prior to coreutils-6.5, an inaccessible destination dir (chmod a-x)
+# would cause du to exit prematurely on systems with native openat support.
+
+# 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
+  du --version
+fi
+
+. $srcdir/../envvar-check
+. $srcdir/../lang-default
+
+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
+
+mkdir f && cd f && mkdir a b c d e && touch c/j && chmod a-x c \
+    || framework_failure=1
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+fail=0
+
+du > ../t 2>&1 && fail=1
+
+# Accept either of the following outputs.
+# You get the first from a system with openat _emulation_ (via /proc),
+# the second from a system with native openat support.
+# FIXME: there may well be a third output, for systems with neither
+# /proc support, nor native openat support.
+
+sed 's/^[0-9][0-9]*    //' ../t | sort -u > out
+cat <<\EOF > exp || fail=1
+.
+./a
+./b
+./d
+./e
+du: `./c': Permission denied
+EOF
+
+cat <<\EOF > exp2 || fail=1
+.
+./a
+./b
+./c
+./d
+./e
+du: cannot access `./c/j': Permission denied
+EOF
+
+cmp out exp > /dev/null 2>&1 || {
+  cmp out exp2 || fail=1
+  }
+test $fail = 1 && diff out exp 2> /dev/null
+
+(exit $fail); exit $fail
diff --git a/tests/du/no-x b/tests/du/no-x
index 61bd07a..fa93e97 100755
--- a/tests/du/no-x
+++ b/tests/du/no-x
@@ -55,7 +55,6 @@ EOF
 # With native fdopendir, du uses a different code path.
 cat <<\EOF > exp-native-fdopendir
 du: cannot access `d/no-x/y': Permission denied
-du: fts_read failed: Permission denied
 EOF

 if cmp out exp >/dev/null 2>&1; then