Home | History | Annotate | Line # | Download | only in rc.d 
      1 #!/bin/sh
      2 #
      3 # $NetBSD: swap1,v 1.14 2022/04/16 18:15:20 andvar Exp $
      4 #
      5 
      6 # PROVIDE: localswap
      7 # REQUIRE: DISKS root
      8 # KEYWORD: shutdown
      9 
     10 $_rc_subr_loaded . /etc/rc.subr
     11 
     12 name="swap1"
     13 start_cmd="swap1_start"
     14 stop_cmd="swap1_stop"
     15 
     16 dev_free_tmpfs()
     17 {
     18 	# Generate a list of tmpfs filesystems that contain no device nodes,
     19 	# which can presumably be unmounted safely at shutdown time.
     20 	# Filenames are quoted and the list contains no unquoted newlines,
     21 	# so that the output can be reparsed as a single argument list.
     22 	mount -t tmpfs | while read -r line
     23 	do
     24 		fs=${line#tmpfs on }
     25 		fs=${fs% type tmpfs*}
     26 		find -x "${fs}" \( -type b -or -type c \) -exit 1 &&
     27 			echo -n "'${fs}' "
     28 	done
     29 }
     30 
     31 umount_vm_consumers()
     32 {
     33 	case ${swapoff_umount} in
     34 		auto)
     35 			swapoff_umount_fs="$(dev_free_tmpfs)"
     36 			;;
     37 		manual)
     38 			# swapoff_umount_fs set manually
     39 			;;
     40 	esac
     41 	# eval so that quotes within $swapoff_umount_fs are parsed properly
     42 	eval set -- "${swapoff_umount_fs}"
     43 	for fs in "$@"
     44 	do
     45 		echo "Forcibly unmounting ${fs}"
     46 		umount -ft tmpfs "${fs}"
     47 	done
     48 }
     49 
     50 #		Add all block-type swap devices; these might be necessary
     51 #		during disk checks.
     52 #
     53 swap1_start()
     54 {
     55 	# Treat exit status 2 from swapctl(8) as successful; it means
     56 	# "no error, but no suitable swap devices were configured".
     57 	#
     58 	if ! checkyesno no_swap; then
     59 		swapctl -A -t blk || [ $? = 2 ]
     60 	fi
     61 }
     62 
     63 #		Remove all block-type swap devices
     64 #
     65 swap1_stop()
     66 {
     67 	if checkyesno swapoff || [ -n "$rc_force" ]; then
     68 		umount_vm_consumers
     69 		echo "Removing block-type swap devices"
     70 		swapctl -U -t blk || [ $? = 2 ]
     71 	fi
     72 }
     73 
     74 load_rc_config swap
     75 run_rc_command "$1"
     76