1#!/bin/sh
2# Test for proper detection of EPIPE with ignored SIGPIPE
3
4# Copyright (C) 2016-2023 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_ seq
21trap_sigpipe_or_skip_
22
23# /bin/sh has an intermittent failure in ignoring SIGPIPE on OpenIndiana 11
24# so we require bash as discussed at:
25# https://lists.gnu.org/archive/html/coreutils/2020-03/msg00004.html
26require_bash_as_SHELL_
27
28# upon EPIPE with signals ignored, 'seq' should exit with an error.
29timeout 10 $SHELL -c \
30  'trap "" PIPE && { seq inf 2>err; echo $? >code; } | head -n1' >out
31
32# Exit-code must be 1, indicating 'write error'
33echo 1 > exp || framework_failure_
34compare exp out || fail=1
35compare exp code || fail=1
36
37grep '^seq: write error: ' err \
38  || { warn_ "seq emitted incorrect error on EPIPE"; \
39       cat err;\
40       fail=1; }
41
42Exit $fail
43