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#!/usr/bin/bats -t
# SPDX-License-Identifier: MPL-2.0
#
# libpathrs: safe path resolution on Linux
# Copyright (C) 2019-2025 Aleksa Sarai <cyphar@cyphar.com>
# Copyright (C) 2019-2025 SUSE LLC
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
load helpers
function setup() {
setup_tmpdirs
}
function teardown() {
teardown_tmpdirs
}
@test "root symlink" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" symlink /etc/passwd passwd-link
[ "$status" -eq 0 ]
[ -f "$ROOT/etc/passwd" ]
[ -L "$ROOT/passwd-link" ]
sane_run readlink "$ROOT/passwd-link"
[ "$status" -eq 0 ]
[[ "$output" == "/etc/passwd" ]]
pathrs-cmd root --root "$ROOT" readlink /passwd-link
[ "$status" -eq 0 ]
grep -Fx 'LINK-TARGET /etc/passwd' <<<"$output"
}
@test "root symlink [no-clobber file]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/etc"
touch "$ROOT/link"
ino="$(stat -c '%i' "$ROOT/link")"
pathrs-cmd root --root "$ROOT" symlink ../target link
check-errno EEXIST
[ -f "$ROOT/link" ]
sane_run stat -c '%i' "$ROOT/link"
[[ "$output" == "$ino" ]]
}
@test "root symlink [no-clobber symlink]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/etc"
touch "$ROOT/new"
ln -s /old/link "$ROOT/link"
pathrs-cmd root --root "$ROOT" symlink /new link
check-errno EEXIST
[ -L "$ROOT/link" ]
sane_run readlink "$ROOT/link"
[ "$status" -eq 0 ]
[[ "$output" == "/old/link" ]]
pathrs-cmd root --root "$ROOT" readlink /link
[ "$status" -eq 0 ]
grep -Fx 'LINK-TARGET /old/link' <<<"$output"
}
@test "root symlink [directory]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo/bar/baz"
pathrs-cmd root --root "$ROOT" symlink ../foo/bar link
[ "$status" -eq 0 ]
[ -d "$ROOT/foo/bar" ]
[ -L "$ROOT/link" ]
sane_run readlink "$ROOT/link"
[ "$status" -eq 0 ]
[[ "$output" == "../foo/bar" ]]
pathrs-cmd root --root "$ROOT" readlink link
[ "$status" -eq 0 ]
grep -Fx 'LINK-TARGET ../foo/bar' <<<"$output"
}
@test "root symlink [symlink]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo"
touch "$ROOT/foo/bar"
ln -s /foo/bar "$ROOT/target-link"
pathrs-cmd root --root "$ROOT" symlink target-link link
[ "$status" -eq 0 ]
[ -f "$ROOT/foo/bar" ]
[ -L "$ROOT/target-link" ]
[ -L "$ROOT/link" ]
sane_run readlink "$ROOT/link"
[ "$status" -eq 0 ]
[[ "$output" == "target-link" ]]
pathrs-cmd root --root "$ROOT" readlink link
[ "$status" -eq 0 ]
grep -Fx 'LINK-TARGET target-link' <<<"$output"
}
@test "root symlink [non-existent target]" {
ROOT="$(setup_tmpdir)"
pathrs-cmd root --root "$ROOT" symlink ../..//some/dummy/path link
[ "$status" -eq 0 ]
! [ -e "$ROOT/some/dummy/path" ]
[ -L "$ROOT/link" ]
sane_run readlink "$ROOT/link"
[ "$status" -eq 0 ]
[[ "$output" == "../..//some/dummy/path" ]]
pathrs-cmd root --root "$ROOT" readlink link
[ "$status" -eq 0 ]
grep -Fx 'LINK-TARGET ../..//some/dummy/path' <<<"$output"
}
@test "root symlink [non-existent parent component]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo/bar/baz"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" symlink /etc/passwd foo/nope/baz
check-errno ENOENT
! [ -e "$ROOT/foo/nope" ]
! [ -e "$ROOT/foo/nope/baz" ]
}
@test "root symlink [bad parent component]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo"
touch "$ROOT/foo/bar"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" symlink /etc/passwd foo/bar/baz
check-errno ENOTDIR
[ -f "$ROOT/foo/bar" ]
! [ -e "$ROOT/foo/bar/baz" ]
}
@test "root hardlink" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" hardlink /etc/passwd passwd-link
[ "$status" -eq 0 ]
[ -f "$ROOT/etc/passwd" ]
[ -f "$ROOT/passwd-link" ]
sane_run readlink "$ROOT/passwd-link"
[ "$status" -ne 0 ] # not a symlink!
# Hardlinks have the same inode.
sane_run stat -c '%i' "$ROOT/etc/passwd"
target_ino="$output"
sane_run stat -c '%i' "$ROOT/passwd-link"
link_ino="$output"
[[ "$target_ino" == "$link_ino" ]]
}
@test "root hardlink [no-clobber file]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/etc"
touch "$ROOT/target"
touch "$ROOT/link"
ino="$(stat -c '%i' "$ROOT/link")"
pathrs-cmd root --root "$ROOT" hardlink target link
check-errno EEXIST
[ -f "$ROOT/link" ]
sane_run stat -c '%i' "$ROOT/link"
[[ "$output" == "$ino" ]]
}
@test "root hardlink [no-clobber symlink]" {
ROOT="$(setup_tmpdir)"
touch "$ROOT/foobar"
touch "$ROOT/target"
ln -s /foobar "$ROOT/link"
ino="$(stat -c '%i' "$ROOT/link")"
pathrs-cmd root --root "$ROOT" hardlink /target link
check-errno EEXIST
[ -L "$ROOT/link" ]
sane_run stat -c '%i' "$ROOT/link"
[[ "$output" == "$ino" ]]
}
@test "root hardlink [directory]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo/bar/baz"
pathrs-cmd root --root "$ROOT" hardlink /foo/bar link
check-errno EPERM
[ -d "$ROOT/foo/bar" ]
! [ -e "$ROOT/link" ]
}
@test "root hardlink [non-existent target]" {
ROOT="$(setup_tmpdir)"
pathrs-cmd root --root "$ROOT" hardlink ../..//some/dummy/path link
check-errno ENOENT
}
@test "root hardlink [non-existent parent component]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo/bar/baz"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" hardlink /etc/passwd foo/nope/baz
check-errno ENOENT
! [ -e "$ROOT/foo/nope" ]
! [ -e "$ROOT/foo/nope/baz" ]
}
@test "root hardlink [bad parent component]" {
ROOT="$(setup_tmpdir)"
mkdir -p "$ROOT/foo"
touch "$ROOT/foo/bar"
mkdir -p "$ROOT/etc"
echo "passwd" >"$ROOT/etc/passwd"
pathrs-cmd root --root "$ROOT" hardlink /etc/passwd foo/bar/baz
check-errno ENOTDIR
[ -f "$ROOT/foo/bar" ]
! [ -e "$ROOT/foo/bar/baz" ]
}
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