#!/bin/sh
#
# Check how SCM_RIGHTS and SCM_CREDENTIALS control messages are decoded in -y mode.
#
# Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

. "${srcdir=.}/init.sh"

# strace -y is implemented using /proc/$pid/fd
[ -d /proc/self/fd/ ] ||
	framework_skip_ '/proc/self/fd/ is not available'

check_prog mkdir
check_prog rm
check_prog seq
check_prog touch

dir="$LOG.dir"
rm -rf -- "$dir"
mkdir -- "$dir" ||
	framework_skip_ 'failed to create a directory'

file="$dir/$(for i in $(seq 1 127); do echo A; done; echo Z)"

touch -- "$file" ||
	framework_skip_ 'failed to create a file'

run_prog ./scm_rights /dev/zero
run_strace -y -x -enetwork $args "$file"

hex='[[:xdigit:]]'
n='[1-9][0-9]*'
sample="$(for i in $(seq 1 15); do printf '\\\\xf%x' $i; done)"
socket='<socket:\[[0-9]+\]>'

path6='(/.*/(A\\n){127}Z|\\x2f(\\x'"$hex$hex"')*\\x2f(\\x41\\x0a){127}\\x5a)'
rights_data='\[4</dev/null>, 5</dev/zero>, 6<'"$path6"'>\]'
iov='\[\{iov_base="'"$sample"'", iov_len=15\}\]'
ids='\{pid='"$n"', uid=[0-9]+, gid=[0-9]+\}'

msg_head='\{msg_name=NULL, msg_namelen=0, msg_iov='"$iov"', msg_iovlen=1, msg_control='
msg_tail=', msg_controllen='"$n"', msg_flags=0'
rights='\{cmsg_len='"$n"', cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data='"$rights_data"'\}'
creds='\{cmsg_len='"$n"', cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data='"$ids"'\}'

EXPECTED="$LOG.expected"

cat > "$EXPECTED" << __EOF__
sendmsg\\(3$socket, $msg_head\\[$rights\\]$msg_tail\\}, 0\\) = 15
recvmsg\\(0$socket, $msg_head\\[$creds, $rights\\]$msg_tail\\}, 0\\) = 15
__EOF__

match_grep "$LOG" "$EXPECTED"
rm -f "$EXPECTED"
rm -rf -- "$dir"

exit 0