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tests: mv: check cross-device move of dir with hard links and symlink by sylvestre · Pull Request #337 · coreutils/coreutils · GitHub

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tests: mv: check cross-device move of dir with hard links and symlink #337

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tests: mv: check cross-device move of dir with hard links and symlink #337

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1 change: 1 addition & 0 deletions tests/local.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -805,6 +805,7 @@ all_tests = \
tests/mv/no-target-dir.sh \
tests/mv/part-fail.sh \
tests/mv/part-hardlink.sh \
tests/mv/part-hardlink-symlink.sh \
tests/mv/part-rename.sh \
tests/mv/part-symlink.sh \
tests/mv/partition-perm.sh \
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58 changes: 58 additions & 0 deletions tests/mv/part-hardlink-symlink.sh
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@@ -0,0 +1,58 @@
#!/bin/sh
# Ensure that moving a directory across file systems preserves both
# hard links and symlinks contained in it.

# Copyright (C) 2026 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 <https://www.gnu.org/licenses/>.

. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ mv
cleanup_() { rm -rf "$other_partition_tmpdir"; }
. "$abs_srcdir/tests/other-fs-tmpdir"

# A directory holding a hard linked pair of files, and a symlink to one
# of them. The link count > 1 combined with the symlink used to be
# enough to confuse some implementations into replacing the regular
# files with symlinks, thus losing the data.
mkdir d || framework_failure_
printf 'important data' > d/realfile || framework_failure_
ln d/realfile d/realfile2 || framework_failure_
ln -s realfile d/link1 || framework_failure_

printf 'important data' > exp || framework_failure_

mv d "$other_partition_tmpdir" || fail=1

# The source directory must be gone.
test -d d && fail=1

dest="$other_partition_tmpdir/d"

# The regular files must still be regular files with the original data.
for f in realfile realfile2; do
test -f "$dest/$f" || fail=1
test -L "$dest/$f" && fail=1
compare exp "$dest/$f" || fail=1
done

# ... and must still be hard linked together.
set -- $(ls -Ci "$dest/realfile" "$dest/realfile2")
test $1 = $3 || fail=1

# The symlink must still be a symlink to realfile.
test -L "$dest/link1" || fail=1
test "$(readlink "$dest/link1")" = realfile || fail=1

Exit $fail
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