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#!/bin/sh
# Ensure that cp -a and cp --preserve=context work properly.
# In particular, test on a writable NFS partition.
# 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 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
cp --version
fi
. $srcdir/../envvar-check
. $srcdir/../lang-default
. $srcdir/../selinux
PRIV_CHECK_ARG=require-root . $srcdir/../priv-check
pwd=`pwd`
t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
trap 'status=$?; cd "$pwd"; umount $tmp/mnt; 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
# Create a file system, then mount it with the context=... option.
dd if=/dev/zero of=blob bs=8192 count=200 > /dev/null 2>&1 \
|| framework_failure=1
mkdir mnt || framework_failure=1
mkfs -t ext2 -F blob > /dev/null 2>&1 || framework_failure=1
mount -oloop,context=system_u:object_r:removable_t blob mnt \
|| framework_failure=1
cd mnt || framework_failure=1
echo > f || framework_failure=1
echo > g || framework_failure=1
if test $framework_failure = 1; then
echo "$0: failure in testing framework" 1>&2
(exit 1); exit 1
fi
fail=0
# /bin/cp from coreutils-6.7-3.fc7 would fail this test by letting cp
# succeed (giving no diagnostics), yet leaving the destination file empty.
cp -a f g 2>err || fail=1
test -s g || fail=1 # The destination file must not be empty.
test -s err && fail=1 # There must be no stderr output.
rm -f g err
echo > g
# =====================================================
# Here, we expect cp to fail, because it cannot set the SELinux
# security context through NFS or a mount with fixed context.
cp --preserve=context f g 2> out && fail=1
# Here, we *do* expect the destination to be empty.
test -s g && fail=1
# An alternative to the current approach would be to run in a confined
# domain (maybe creating/loading it) that lacks the required permissions
# to the file type.
# Note: this test could also be run by a regular (non-root) user in an
# NFS mounted directory. When doing that, I get this diagnostic:
# cp: failed to set the security context of `g' to `system_u:object_r:nfs_t': \
# Operation not supported
sed "s/ .g' to .*//" out > k
mv k out
cat <<\EOF > exp || fail=1
cp: failed to set the security context of
EOF
cmp out exp || fail=1
test $fail = 1 && diff out exp 2> /dev/null
(exit $fail); exit $fail
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