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# All rights reserved. 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 3. The name of the author may not be used to endorse or promote products 17# derived from this software without specific prior written permission. 18# 19# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30. "${srcdir=.}/init.sh" 31 32run_prog_skip_if_failed \ 33 kill -0 $$ 34 35check_prog sleep 36check_prog yes 37 38> "$OUT" 39> "$LOG" 40( 41 while [ -f "$LOG" ]; do 42 : 43 done 44 $SLEEP_A_BIT & 45 yes 46 if kill -0 $! 2> /dev/null; then 47 wait 48 else 49 echo TIMEOUT >> "$OUT" 50 fi 51) | $STRACE -qq -enone -esignal=none \ 52 sh -c "exec <&- >&-; rm -f -- $LOG; $SLEEP_A_BIT; $SLEEP_A_BIT" 53 54if [ -s "$OUT" ]; then 55 fail_ "$STRACE failed to redirect standard input" 56fi 57 58> "$LOG" 59$STRACE -qq -enone -esignal=none \ 60 sh -c "exec <&- >&-; rm -f -- $LOG; $SLEEP_A_BIT; $SLEEP_A_BIT" | 61( 62 while [ -f "$LOG" ]; do 63 : 64 done 65 $SLEEP_A_BIT & 66 cat > /dev/null 67 if kill -0 $! 2> /dev/null; then 68 wait 69 else 70 echo TIMEOUT >> "$OUT" 71 fi 72) 73 74if [ -s "$OUT" ]; then 75 fail_ "$STRACE failed to redirect standard output" 76fi 77 78rm -f -- "$OUT" 79