Test for today's gnulib/lib/getcwd.c fix affecting pwd and readlink

* NEWS: Mention the bug fix.
* tests/misc/pwd-unreadable-parent: New file.
* tests/misc/Makefile.am (TESTS): Ad pwd-unreadable-parent.

2 files changed, 57 insertions, 0 deletions

diff --git a/tests/misc/Makefile.am b/tests/misc/Makefile.am
index c4c279d67..145afbe0c 100644
--- a/tests/misc/Makefile.am
+++ b/tests/misc/Makefile.am
@@ -37,6 +37,7 @@ TESTS_ENVIRONMENT = \
 # will execute the test script rather than the standard utility.
 
 TESTS = \
+  pwd-unreadable-parent \
   cut \
   wc-files0-from \
   wc-files0 \
diff --git a/tests/misc/pwd-unreadable-parent b/tests/misc/pwd-unreadable-parent
new file mode 100755
index 000000000..f84627ec4
--- /dev/null
+++ b/tests/misc/pwd-unreadable-parent
@@ -0,0 +1,56 @@
+#!/bin/sh
+# Ensure that pwd and "readlink -e ." work even when a parent directory
+# is unreadable.  Perform this test only on systems with a usable getcwd
+# function that has this capability.
+
+# Copyright (C) 2007 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
+  pwd --version
+  readlink --version
+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
+
+mkdir -p a/b || framework_failure=1
+cd a/b || framework_failure=1
+chmod a=x .. || framework_failure=1
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+pwd_exe=$pwd/../../src/pwd
+
+fail=0
+$pwd_exe > exp || fail=1
+readlink -ev . > out || fail=1
+
+cmp out exp || fail=1
+test $fail = 1 && diff out exp 2> /dev/null
+
+(exit $fail); exit $fail