1#!/bin/sh
2# Ensure that wc prints counts atomically
3# so that concurrent processes don't intersperse their output
4
5# Copyright (C) 2009-2023 Free Software Foundation, Inc.
6
7# This program is free software: you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16
17# You should have received a copy of the GNU General Public License
18# along with this program.  If not, see <https://www.gnu.org/licenses/>.
19
20. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
21print_ver_ wc
22
23xargs -P2 </dev/null >/dev/null 2>&1 \
24  || skip_ 'xargs -P is required'
25
26(mkdir tmp && cd tmp && seq 2000 | xargs touch)
27
28# This will output at least 16KiB per process
29# and start 3 processes, with 2 running concurrently,
30# which triggers often on Fedora 11 at least.
31(find tmp tmp tmp -type f | xargs -n2000 -P2 wc 2>err) |
32sed -n '/0 0 0 /!p' |
33grep . > /dev/null && fail=1
34compare /dev/null err || fail=1
35
36Exit $fail
37