1#!/bin/sh 2# 3# Ensure that strace can detach from running processes. 4# 5# Copyright (c) 2013-2015 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 36 37set -e 38 39./set_ptracer_any sh -c "echo > $LOG; while :; do :; done" > /dev/null & 40 41while ! [ -s "$LOG" ]; do 42 kill -0 $! 2> /dev/null || 43 fail_ 'set_ptracer_any sh failed' 44 $SLEEP_A_BIT 45done 46 47tracee_pid=$! 48 49cleanup() 50{ 51 set +e 52 kill $tracee_pid 53 wait $tracee_pid 2> /dev/null 54 return 0 55} 56 57rm -f "$LOG" 58$STRACE -p $tracee_pid 2> "$LOG" & 59 60while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do 61 kill -0 $! 2> /dev/null || { 62 cleanup 63 dump_log_and_fail_with "$STRACE -p failed to attach" 64 } 65 $SLEEP_A_BIT 66done 67 68kill -INT $! 69wait $! 70 71grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || { 72 cleanup 73 dump_log_and_fail_with "$STRACE -p failed to detach" 74 } 75 76if [ -f /proc/self/status ]; then 77 $SLEEP_A_BIT 78 test -d /proc/$tracee_pid || { 79 cleanup 80 dump_log_and_fail_with 'tracee died after detach' 81 } 82 grep '^State:.*R (running)' < /proc/$tracee_pid/status > /dev/null || { 83 grep '^State:' < /proc/$tracee_pid/status 84 cleanup 85 dump_log_and_fail_with 'tracee is not running after detach' 86 } 87fi 88 89cleanup 90exit 0 91