1#!/bin/sh
2#
3# Ensure that strace does not retain stdin and stdout descriptors.
4#
5# Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
6# Copyright (c) 2016-2017 The strace developers.
7# All rights reserved.
8#
9# Redistribution and use in source and binary forms, with or without
10# modification, are permitted provided that the following conditions
11# are met:
12# 1. Redistributions of source code must retain the above copyright
13#    notice, this list of conditions and the following disclaimer.
14# 2. Redistributions in binary form must reproduce the above copyright
15#    notice, this list of conditions and the following disclaimer in the
16#    documentation and/or other materials provided with the distribution.
17# 3. The name of the author may not be used to endorse or promote products
18#    derived from this software without specific prior written permission.
19#
20# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31. "${srcdir=.}/init.sh"
32
33run_prog_skip_if_failed \
34	kill -0 $$
35
36check_prog sleep
37check_prog yes
38
39> "$OUT"
40> "$LOG"
41(
42	while [ -f "$LOG" ]; do
43		:
44	done
45	$SLEEP_A_BIT &
46	yes
47	if kill -0 $! 2> /dev/null; then
48		wait
49	else
50		echo TIMEOUT >> "$OUT"
51	fi
52) | $STRACE -qq -enone -esignal=none \
53	sh -c "exec <&- >&-; rm -f -- $LOG; $SLEEP_A_BIT; $SLEEP_A_BIT"
54
55if [ -s "$OUT" ]; then
56	fail_ "$STRACE failed to redirect standard input"
57fi
58
59> "$LOG"
60$STRACE -qq -enone -esignal=none \
61	sh -c "exec <&- >&-; rm -f -- $LOG; $SLEEP_A_BIT; $SLEEP_A_BIT" |
62(
63	while [ -f "$LOG" ]; do
64		:
65	done
66	$SLEEP_A_BIT &
67	cat > /dev/null
68	if kill -0 $! 2> /dev/null; then
69		wait
70	else
71		echo TIMEOUT >> "$OUT"
72	fi
73)
74
75if [ -s "$OUT" ]; then
76	fail_ "$STRACE failed to redirect standard output"
77fi
78