1 #!/bin/sh 2 # 3 # Ensure that strace can detach from running processes. 4 # 5 # Copyright (c) 2013-2015 Dmitry V. Levin <ldv (at] 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 32 run_prog_skip_if_failed \ 33 kill -0 $$ 34 35 check_prog sleep 36 37 set -e 38 39 ./set_ptracer_any sh -c "echo > $LOG; while :; do :; done" > /dev/null & 40 41 while ! [ -s "$LOG" ]; do 42 kill -0 $! 2> /dev/null || 43 fail_ 'set_ptracer_any sh failed' 44 $SLEEP_A_BIT 45 done 46 47 tracee_pid=$! 48 49 cleanup() 50 { 51 set +e 52 kill $tracee_pid 53 wait $tracee_pid 2> /dev/null 54 return 0 55 } 56 57 rm -f "$LOG" 58 $STRACE -p $tracee_pid 2> "$LOG" & 59 60 while ! 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 66 done 67 68 kill -INT $! 69 wait $! 70 71 grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || { 72 cleanup 73 dump_log_and_fail_with "$STRACE -p failed to detach" 74 } 75 76 if [ -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_pid_status "$tracee_pid" '^State:.*R (running)' > /dev/null || { 83 grep_pid_status "$tracee_pid" '^State:' 84 cleanup 85 dump_log_and_fail_with 'tracee is not running after detach' 86 } 87 fi 88 89 cleanup 90 exit 0 91
