1#!/bin/sh
2# Test for sort --compress hang
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ sort
21very_expensive_
22
23cat <<EOF >compress || framework_failure_
24#!$SHELL
25tr 41 14 || exit
26touch ok
27EOF
28
29chmod +x compress
30
31seq -w 200000 > exp || fail=1
32tac exp > in || fail=1
33
34# When the bug occurs, 'sort' hangs forever.  When it doesn't occur,
35# 'sort' could be running slowly on an overburdened machine.
36# On a circa-2010 Linux server using NFS, a successful test completes
37# in about 170 seconds, so specify 1700 seconds as a safety margin.
38# Note --foreground will not kill any of the "compress" sub processes,
39# assuming they're well behaved and exit in a timely manner, but will
40# allow this command to be responsive to Ctrl-C
41timeout --foreground 1700 sort --compress-program=./compress -S 1k in > out \
42  || fail=1
43
44compare exp out || fail=1
45test -f ok || fail=1
46rm -f compress ok
47
48# If $TMPDIR is relative, give subprocesses time to react when 'sort' exits.
49# Otherwise, under NFS, when 'sort' unlinks the temp files and they
50# are renamed to .nfsXXXX instead of being removed, the parent cleanup
51# of this directory will fail because the files are still open.
52case $TMPDIR in
53/*) ;;
54*) sleep 1;;
55esac
56
57Exit $fail
58