nftables support

common/base.sh

@@ -0,0 +1,135 @@
+exists()
+{
+	which "$1" >/dev/null 2>/dev/null
+}
+existf()
+{
+	type "$1" >/dev/null 2>/dev/null
+}
+whichq()
+{
+	which $1 2>/dev/null
+}
+exist_all()
+{
+	while [ -n "$1" ]; do
+		exists "$1" || return 1
+		shift
+	done
+	return 0
+}
+on_off_function()
+{
+	# $1 : function name on
+	# $2 : function name off
+	# $3 : 0 - off, 1 - on
+	local F="$1"
+	[ "$3" = "1" ] || F="$2"
+	shift
+	shift
+	shift
+	"$F" "$@"
+}
+contains()
+{
+	# check if substring $2 contains in $1
+	[ "${1#*$2}" != "$1" ]
+}
+find_str_in_list()
+{
+	[ -n "$1" ] && {
+		for v in $2; do
+			[ "$v" = "$1" ] && return 0
+		done
+	}
+	return 1
+}
+end_with_newline()
+{
+	local c=$(tail -c 1)
+	[ "$c" = "" ]
+}
+make_separator_list()
+{
+	# $1 - var name to receive result
+	# $2 - separator
+	# $3,$4,... - elements
+	local var="$1" sep="$2" i
+
+	shift; shift
+	while [ -n "$1" ]; do
+		if [ -n "$i" ] ; then
+			i=$i$sep$1
+		else
+			i=$1
+		fi
+		shift
+	done
+	eval $var=$i
+}
+make_comma_list()
+{
+	# $1 - var name to receive result
+	# $2,$3,... - elements
+	local var="$1"
+	shift
+	make_separator_list $var , "$@"
+}
+
+is_linked_to_busybox()
+{
+	local IFS F P
+	
+	IFS=:
+	for path in $PATH; do
+		F=$path/$1
+		P="$(readlink $F)"
+		if [ -z "$P" ] && [ -x $F ] && [ ! -L $F ]; then return 1; fi
+		[ "${P%busybox*}" != "$P" ] && return
+	done
+}
+get_dir_inode()
+{
+	local dir="$1"
+	[ -L "$dir" ] && dir=$(readlink "$dir")
+	ls -id "$dir" | awk '{print $1}'
+}
+
+linux_min_version()
+{
+	# $1 - major ver
+	# $2 - minor ver
+	local V1=$(sed -nre 's/^Linux version ([0-9]+)\.[0-9]+.*$/\1/p' /proc/version)
+	local V2=$(sed -nre 's/^Linux version [0-9]+\.([0-9]+).*$/\1/p' /proc/version)
+	[ -n "$V1" -a -n "$V2" ] && [ "$V1" -gt "$1" -o "$V1" -eq "$1" -a "$V2" -ge "$2" ]
+}
+linux_get_subsys()
+{
+	local INIT=$(sed 's/\x0/\n/g' /proc/1/cmdline | head -n 1)
+
+	[ -L "$INIT" ] && INIT=$(readlink "$INIT")
+	INIT=$(basename "$INIT")
+	if [ -f "/etc/openwrt_release" ] && [ "$INIT" = "procd" ] ; then
+		SUBSYS=openwrt
+	else
+		# generic linux
+		SUBSYS=
+	fi
+}
+openwrt_fw3()
+{
+	[ ! -x /sbin/fw4 -a -x /sbin/fw3 ]
+}
+openwrt_fw4()
+{
+	[ -x /sbin/fw4 ]
+}
+openwrt_fw3_integration()
+{
+	[ "$FWTYPE" = iptables ] && openwrt_fw3
+}
+
+create_dev_stdin()
+{
+	[ -e /dev/stdin ] || ln -s /proc/self/fd/0 /dev/stdin
+}