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