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#!/bin/sh
#
# Check how SCM_RIGHTS and SCM_CREDENTIALS control messages are decoded in -y mode.
#
# Copyright (c) 2014-2015 Dmitry V. Levin <ldv@strace.io>
# Copyright (c) 2014-2021 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later
. "${srcdir=.}/init.sh"
# strace -y is implemented using /proc/$pid/fd
[ -d /proc/self/fd/ ] ||
framework_skip_ '/proc/self/fd/ is not available'
check_prog mkdir
check_prog seq
check_prog touch
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 -e%network $args "$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='"$ids"'\}'
cat > "$EXP" << __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 "$LOG" "$EXP"
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