1#!/bin/sh
2# ensure that mv doesn't first unlink a multi-hard-linked destination
3
4# Copyright (C) 2008-2023 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_ mv
21require_strace_ unlink
22
23# Before the fix, mv would unnecessarily unlink the destination symlink:
24#   $ rm -f a b b2; touch a b; ln b b2; strace -e unlink /p/bin/mv a b
25#   unlink("b")                             = 0
26#
27# With the fix, it doesn't call unlink:
28#   $ rm -f a b b2; touch a b; ln b b2; strace -e unlink ./mv a b
29#   $
30
31touch a b || framework_failure_
32ln b b2 || framework_failure_
33
34
35strace -qe unlink mv a b > out 2>&1 || fail=1
36$EGREP 'unlink.*"b"' out && fail=1
37
38# Ensure that the source, "a", is gone.
39ls -dl a > /dev/null 2>&1 && fail=1
40
41# Ensure that the destination, "b", has link count 1.
42n_links=$(stat --printf=%h b) || fail=1
43test "$n_links" = 1 || fail=1
44
45Exit $fail
46