#!/bin/sh
#
# $FreeBSD: releng/12.4/libexec/rc/rc.d/linux 364985 2020-08-31 12:14:20Z trasz $
#

# PROVIDE: linux
# REQUIRE: archdep
# KEYWORD: nojail

. /etc/rc.subr

name="linux"
desc="Enable Linux ABI"
rcvar="linux_enable"
start_cmd="${name}_start"
stop_cmd=":"

unmounted()
{
	[ `stat -f "%d" "$1"` == `stat -f "%d" "$1/.."` -a \
	  `stat -f "%i" "$1"` != `stat -f "%i" "$1/.."` ]
}

linux_start()
{
	local _emul_path _tmpdir

	load_kld -e 'linux(aout|elf)' linux
	case `sysctl -n hw.machine_arch` in
	amd64)
		load_kld -e 'linux64elf' linux64
		;;
	esac
	if [ -x /compat/linux/sbin/ldconfigDisabled ]; then
		_tmpdir=`mktemp -d -t linux-ldconfig`
		/compat/linux/sbin/ldconfig -C ${_tmpdir}/ld.so.cache
		if ! cmp -s ${_tmpdir}/ld.so.cache /compat/linux/etc/ld.so.cache; then
			cat ${_tmpdir}/ld.so.cache > /compat/linux/etc/ld.so.cache
		fi
		rm -rf ${_tmpdir}
	fi

	# Linux uses the pre-pts(4) tty naming scheme.
	load_kld pty

	# Handle unbranded ELF executables by defaulting to ELFOSABI_LINUX.
	if [ `sysctl -ni kern.elf64.fallback_brand` -eq "-1" ]; then
		sysctl kern.elf64.fallback_brand=3 > /dev/null
	fi

	if [ `sysctl -ni kern.elf32.fallback_brand` -eq "-1" ]; then
		sysctl kern.elf32.fallback_brand=3 > /dev/null
	fi

	if checkyesno linux_mounts_enable; then 
		_emul_path="/compat/linux"
		unmounted "${_emul_path}/proc" && mount -t linprocfs linprocfs "${_emul_path}/proc"
		unmounted "${_emul_path}/sys" && mount -t linsysfs linsysfs "${_emul_path}/sys"
		unmounted "${_emul_path}/dev" && mount -t devfs devfs "${_emul_path}/dev"
		unmounted "${_emul_path}/dev/fd" && mount -o linrdlnk -t fdescfs fdescfs "${_emul_path}/dev/fd"
		unmounted "${_emul_path}/dev/shm" && mount -o mode=1777 -t tmpfs tmpfs "${_emul_path}/dev/shm"
		true
	fi
}

load_rc_config $name
run_rc_command "$1"