1#!/bin/sh 2# Verify that --preserve-root works. 3 4# Copyright (C) 2006-2023 Free Software Foundation, Inc. 5 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 3 of the License, or 9# (at your option) any later version. 10 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <https://www.gnu.org/licenses/>. 18 19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src 20print_ver_ chown 21skip_if_root_ 22 23mkdir d && ln -s / d/slink-to-root 24 25 26# Even if --preserve-root were to malfunction, allowing the chown or 27# chgrp to traverse through "/", since we're running as non-root, 28# they would be very unlikely to cause any changes. 29chown -R --preserve-root 0 / > out 2>&1 && fail=1 30chgrp -R --preserve-root 0 / >> out 2>&1 && fail=1 31 32# Here, if --preserve-root were to malfunction, chmod could make changes, 33# but only to files owned and unreadable by the user running this test, 34# and then, only to make them readable by owner. 35chmod -R --preserve-root u+r / >> out 2>&1 && fail=1 36 37# With -RHh, --preserve-root should trigger nothing, 38# since the symlink in question is not a command line argument. 39# Contrary to the above commands, these two should succeed. 40echo '==== test -RHh' >> out || framework_failure_ 41chown -RHh --preserve-root $(id -u) d >> out 2>&1 || fail=1 42chgrp -RHh --preserve-root $(id -g) d >> out 2>&1 || fail=1 43 44# These must fail. 45echo '==== test -RLh' >> out || framework_failure_ 46chown -RLh --preserve-root $(id -u) d >> out 2>&1 && fail=1 47chgrp -RLh --preserve-root $(id -g) d >> out 2>&1 && fail=1 48 49cat <<\EOF > exp || framework_failure_ 50chown: it is dangerous to operate recursively on '/' 51chown: use --no-preserve-root to override this failsafe 52chgrp: it is dangerous to operate recursively on '/' 53chgrp: use --no-preserve-root to override this failsafe 54chmod: it is dangerous to operate recursively on '/' 55chmod: use --no-preserve-root to override this failsafe 56==== test -RHh 57==== test -RLh 58chown: it is dangerous to operate recursively on 'd/slink-to-root' (same as '/') 59chown: use --no-preserve-root to override this failsafe 60chgrp: it is dangerous to operate recursively on 'd/slink-to-root' (same as '/') 61chgrp: use --no-preserve-root to override this failsafe 62EOF 63 64compare exp out || fail=1 65 66Exit $fail 67