#!/bin/bash

#

# Copyright (C) 2016 Colin Walters <walters@verbum.org>

#

# SPDX-License-Identifier: LGPL-2.0+

#

# This library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2 of the License, or (at your option) any later version.

#

# This library 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

# Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public

# License along with this library; if not, write to the

# Free Software Foundation, Inc., 59 Temple Place - Suite 330,

# Boston, MA 02111-1307, USA.

set -euo pipefail

. $(dirname $0)/libtest.sh

skip_without_fuse

skip_without_user_xattrs

setup_test_repository "bare"

echo "1..11"

cd ${test_tmpdir}

mkdir mnt

# The default content set amazingly doesn't have a non-broken link

ln -s firstfile files/firstfile-link

$OSTREE commit -b test2 --tree=dir=files

$OSTREE checkout -H test2 checkout-test2

rofiles-fuse checkout-test2 mnt

cleanup_fuse() {

    fusermount -u ${test_tmpdir}/mnt || true

}

libtest_exit_cmds+=(cleanup_fuse)

assert_file_has_content mnt/firstfile first

echo "ok mount"

# Test open(O_TRUNC) directly and via symlink

for path in firstfile{,-link}; do

    if cp /dev/null mnt/${path} 2>err.txt; then

        assert_not_reached "inplace mutation ${path}"

    fi

    assert_file_has_content err.txt "Read-only file system"

    assert_file_has_content mnt/firstfile first

    assert_file_has_content checkout-test2/firstfile first

done

echo "ok failed inplace mutation (open O_TRUNCATE)"

# Test chmod

if chmod 0600 mnt/firstfile 2>err.txt; then

    assert_not_reached "chmod inplace"

fi

assert_file_has_content err.txt "chmod:.*Read-only file system"

# Test chown with regfiles and symlinks

for path in firstfile baz/alink; do

    if chown -h $(id -u) mnt/${path} 2>err.txt; then

        assert_not_reached "chown inplace ${path}"

    fi

    assert_file_has_content err.txt "chown:.*Read-only file system"

done

# And test via dereferencing a symlink

if chown $(id -u) mnt/firstfile-link 2>err.txt; then

    assert_not_reached "chown inplace firstfile-link"

fi

assert_file_has_content err.txt "chown:.*Read-only file system"

echo "ok failed mutation chmod + chown"

# Test creating new files, using chown + chmod on them as well

echo anewfile-for-fuse > mnt/anewfile-for-fuse

assert_file_has_content mnt/anewfile-for-fuse anewfile-for-fuse

assert_file_has_content checkout-test2/anewfile-for-fuse anewfile-for-fuse

ln -s anewfile-for-fuse mnt/anewfile-for-fuse-link

# And also test modifications through a symlink

echo writevialink > mnt/anewfile-for-fuse-link

for path in anewfile-for-fuse{,-link}; do

    assert_file_has_content mnt/${path} writevialink

done

chown $(id -u) mnt/anewfile-for-fuse-link

mkdir mnt/newfusedir

for i in $(seq 5); do

    echo ${i}-morenewfuse-${i} > mnt/newfusedir/test-morenewfuse.${i}

    chmod 0600 mnt/newfusedir/test-morenewfuse.${i}

    chown $(id -u) mnt/newfusedir/test-morenewfuse.${i}

done

assert_file_has_content checkout-test2/newfusedir/test-morenewfuse.3 3-morenewfuse-3

echo "ok new content"

rm mnt/baz/cow

assert_not_has_file checkout-test2/baz/cow

rm mnt/baz/another -rf

assert_not_has_dir checkout-test2/baz/another

echo "ok deletion"

${CMD_PREFIX} ostree --repo=repo commit -b test2 -s fromfuse --link-checkout-speedup --tree=dir=checkout-test2

echo "ok commit"

${CMD_PREFIX} ostree --repo=repo checkout -U test2 mnt/test2-checkout-copy-fallback

assert_file_has_content mnt/test2-checkout-copy-fallback/anewfile-for-fuse writevialink

if ${CMD_PREFIX} ostree --repo=repo checkout -UH test2 mnt/test2-checkout-copy-hardlinked 2>err.txt; then

    assert_not_reached "Checking out via hardlinks across mountpoint unexpectedly succeeded!"

fi

assert_file_has_content err.txt "Unable to do hardlink checkout across devices"

echo "ok checkout copy fallback"

# check that O_RDONLY|O_CREAT is handled correctly; used by flock(1) at least

flock mnt/nonexistent-file echo "ok create file in ro mode"

echo "ok flock"

# And now with --copyup enabled

copyup_reset() {

    cd ${test_tmpdir}

    fusermount -u mnt

    rm checkout-test2 -rf

    $OSTREE checkout -H test2 checkout-test2

    rofiles-fuse --copyup checkout-test2 mnt

}

assert_test_file() {

    t=$1

    f=$2

    if ! test ${t} "${f}"; then

        ls -al "${f}"

        fatal "Failed test ${t} ${f}"

    fi

}

copyup_reset

assert_file_has_content mnt/firstfile first

echo "ok copyup mount"

# Test O_TRUNC directly

firstfile_orig_inode=$(stat -c %i checkout-test2/firstfile)

echo -n truncating > mnt/firstfile

assert_streq "$(cat mnt/firstfile)" truncating

firstfile_new_inode=$(stat -c %i checkout-test2/firstfile)

assert_not_streq "${firstfile_orig_inode}" "${firstfile_new_inode}"

assert_test_file -f checkout-test2/firstfile

copyup_reset

firstfile_link_orig_inode=$(stat -c %i checkout-test2/firstfile-link)

firstfile_orig_inode=$(stat -c %i checkout-test2/firstfile)

# Now write via the symlink

echo -n truncating > mnt/firstfile-link

assert_streq "$(cat mnt/firstfile)" truncating

firstfile_new_inode=$(stat -c %i checkout-test2/firstfile)

firstfile_link_new_inode=$(stat -c %i checkout-test2/firstfile-link)

assert_not_streq "${firstfile_orig_inode}" "${firstfile_new_inode}"

assert_streq "${firstfile_link_orig_inode}" "${firstfile_link_new_inode}"

assert_test_file -f checkout-test2/firstfile

# Verify we didn't replace the link with a regfile somehow

assert_test_file -L checkout-test2/firstfile-link

# These both end up creating new files; in the sed case we'll then do a rename()

copyup_reset

echo "hello new file" > mnt/a-new-non-copyup-file

assert_file_has_content_literal mnt/a-new-non-copyup-file "hello new file"

sed -i -e s,first,second, mnt/firstfile

assert_file_has_content_literal mnt/firstfile "second"

echo "ok copyup"