1#!/bin/sh
2# ensure that stat attempts birthtime access
3
4# Copyright (C) 2010-2023 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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ stat
21
22# Whether birthtime is supported or not, it better not change even when
23# [acm]time are modified.  :)
24touch a || fail=1
25btime=$(stat --format %W a) || fail=1
26atime=$(stat --format %X a) || fail=1
27mtime=$(stat --format %Y a) || fail=1
28ctime=$(stat --format %Z a) || fail=1
29
30# Wait up to 2.17s for timestamps to change.
31# ----------------------------------------
32# iterations   file system resolution  e.g.
33# ----------------------------------------
34# 1            nano or micro second    ext4
35# 4            1 second                ext3
36# 5            2 second                FAT
37# ----------------------------------------
38check_timestamps_updated()
39{
40  local delay="$1"
41  sleep $delay
42  touch a || fail=1
43
44  test "x$btime" = x$(stat --format %W a) &&
45  test "x$atime" != x$(stat --format %X a) &&
46  test "x$mtime" != x$(stat --format %Y a) &&
47  test "x$ctime" != x$(stat --format %Z a)
48}
49retry_delay_ check_timestamps_updated .07 5 || fail=1
50
51Exit $fail
52