1#!/bin/sh
2# Test for assertion failure in "test".
3
4# Copyright (C) 1999-2023 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
20# This test fails with tail from textutils-2.0.
21# It would get something like this:
22#   tail: tail.c:718: recheck: Assertion 'valid_file_spec (f)' failed.
23#   Aborted
24# due to a race condition in which a dev/inode pair is reused.
25
26. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
27print_ver_ tail
28
29check_tail_output()
30{
31  local delay="$1"
32  grep "$tail_re" out ||
33    { sleep $delay; return 1; }
34}
35
36# Terminate any background tail process
37cleanup_() { kill $pid 2>/dev/null && wait $pid; }
38
39# Speedup the non inotify case
40fastpoll='-s.1 --max-unchanged-stats=1'
41
42for mode in '' '---disable-inotify'; do
43  rm -f a foo out
44  touch a foo || framework_failure_
45
46  tail $mode --follow=name $fastpoll a foo > out 2>&1 & pid=$!
47
48  # Wait up to 12.7s for tail to start.
49  echo x > a || framework_failure_
50  tail_re='^x$' retry_delay_ check_tail_output .1 7 ||
51    { cat out; fail=1; break; }
52
53  # Wait 12.7s for this diagnostic:
54  # tail: foo: No such file or directory
55  rm foo || framework_failure_
56  tail_re='No such file' retry_delay_ check_tail_output .1 7 ||
57    { cat out; fail=1; break; }
58
59  # Wait up to 12.7s for tail to notice new foo file
60  ok='ok ok ok'
61  echo "$ok" > foo || framework_failure_
62  tail_re="^$ok$" retry_delay_ check_tail_output .1 7 ||
63    { echo "$0: foo: unexpected delay?"; cat out; fail=1; break; }
64
65  cleanup_
66done
67
68Exit $fail
69