1# $OpenBSD: agent-ptrace.sh,v 1.5 2022/04/22 05:08:43 anton Exp $ 2# Placed in the Public Domain. 3 4tid="disallow agent ptrace attach" 5 6if have_prog uname ; then 7 case `uname` in 8 AIX|CYGWIN*|OSF1) 9 echo "skipped (not supported on this platform)" 10 exit 0 11 ;; 12 esac 13fi 14 15if [ "x$USER" = "xroot" ]; then 16 echo "Skipped: running as root" 17 exit 0 18fi 19 20if have_prog gdb ; then 21 : ok 22else 23 echo "skipped (gdb not found)" 24 exit 0 25fi 26 27if $OBJ/setuid-allowed ${SSHAGENT} ; then 28 : ok 29else 30 echo "skipped (${SSHAGENT} is mounted on a no-setuid filesystem)" 31 exit 0 32fi 33 34if test -z "$SUDO" ; then 35 echo "skipped (SUDO not set)" 36 exit 0 37else 38 $SUDO chown 0 ${SSHAGENT} 39 $SUDO chgrp 0 ${SSHAGENT} 40 $SUDO chmod 2755 ${SSHAGENT} 41 trap "$SUDO chown ${USER} ${SSHAGENT}; $SUDO chmod 755 ${SSHAGENT}" 0 42fi 43 44trace "start agent" 45eval `${SSHAGENT} ${EXTRA_AGENT_ARGS} -s` > /dev/null 46r=$? 47if [ $r -ne 0 ]; then 48 fail "could not start ssh-agent: exit code $r" 49else 50 # ls -l ${SSH_AUTH_SOCK} 51 gdb ${SSHAGENT} ${SSH_AGENT_PID} > ${OBJ}/gdb.out 2>&1 << EOF 52 quit 53EOF 54 r=$? 55 if [ $r -ne 0 ]; then 56 fail "gdb failed: exit code $r" 57 fi 58 egrep 'ptrace: Operation not permitted.|procfs:.*Permission denied.|ttrace.*Permission denied.|procfs:.*: Invalid argument.|Unable to access task ' >/dev/null ${OBJ}/gdb.out 59 r=$? 60 rm -f ${OBJ}/gdb.out 61 if [ $r -ne 0 ]; then 62 fail "ptrace succeeded?: exit code $r" 63 fi 64 65 trace "kill agent" 66 ${SSHAGENT} -k > /dev/null 67fi 68