#!/bin/bash# SPDX-License-Identifier: GPL-2.0 speeds_arr_get(){	cmd='/ETHTOOL_LINK_MODE_[^[:space:]]*_BIT[[:space:]]+=[[:space:]]+/ \		{sub(/,$/, "") \		sub(/ETHTOOL_LINK_MODE_/,"") \		sub(/_BIT/,"") \		sub(/_Full/,"/Full") \		sub(/_Half/,"/Half");\		print "["$1"]="$3}' 	awk "${cmd}" /usr/include/linux/ethtool.h} ethtool_set(){	local cmd="$@"	local out=$(ethtool -s $cmd 2>&1 | wc -l) 	check_err $out "error in configuration. $cmd"} dev_speeds_get(){	local dev=$1; shift	local with_mode=$1; shift	local adver=$1; shift	local speeds_str 	if (($adver)); then		mode="Advertised link modes"	else		mode="Supported link modes"	fi 	speeds_str=$(ethtool "$dev" | \		# Snip everything before the link modes section.		sed -n '/'"$mode"':/,$p' | \		# Quit processing the rest at the start of the next section.		# When checking, skip the header of this section (hence the 2,).		sed -n '2,${/^[\t][^ \t]/q};p' | \		# Drop the section header of the current section.		cut -d':' -f2) 	local -a speeds_arr=($speeds_str)	if [[ $with_mode -eq 0 ]]; then		for ((i=0; i<${#speeds_arr[@]}; i++)); do			speeds_arr[$i]=${speeds_arr[$i]%base*}		done	fi	echo ${speeds_arr[@]}} common_speeds_get(){	dev1=$1; shift	dev2=$1; shift	with_mode=$1; shift	adver=$1; shift 	local -a dev1_speeds=($(dev_speeds_get $dev1 $with_mode $adver))	local -a dev2_speeds=($(dev_speeds_get $dev2 $with_mode $adver)) 	comm -12 \		<(printf '%s\n' "${dev1_speeds[@]}" | sort -u) \		<(printf '%s\n' "${dev2_speeds[@]}" | sort -u)} different_speeds_get(){	local dev1=$1; shift	local dev2=$1; shift	local with_mode=$1; shift	local adver=$1; shift 	local -a speeds_arr 	speeds_arr=($(common_speeds_get $dev1 $dev2 $with_mode $adver))	if [[ ${#speeds_arr[@]} < 2 ]]; then		check_err 1 "cannot check different speeds. There are not enough speeds"	fi 	echo ${speeds_arr[0]} ${speeds_arr[1]}}