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      1 #!/bin/sh
      2 #
      3 # $NetBSD: resize_root,v 1.6 2023/10/04 00:04:42 gutteridge Exp $
      4 #
      5 
      6 # PROVIDE: resize_root
      7 # REQUIRE: fsck_root
      8 # KEYWORD: interactive
      9 
     10 $_rc_subr_loaded . /etc/rc.subr
     11 
     12 name="resize_root"
     13 rcvar=$name
     14 start_cmd="resize_root_start"
     15 stop_cmd=":"
     16 fstab_file=/etc/fstab
     17 rootmp="/"
     18 
     19 split_options()
     20 {
     21 	local IFS
     22 	IFS=,
     23 	OPTS=$1
     24 	for i in $OPTS; do
     25 		echo $i
     26 	done
     27 }
     28 
     29 resize_root_start()
     30 {
     31 	# if ! checkyesno $rcvar; then
     32 	# 	echo "Not resizing $rootmp: resize_root must be set to YES/yes/..."
     33 	# 	return
     34 	# fi
     35 
     36 	trap : 2 		# Ignore SIGINT, SIGQUIT, so we
     37 	trap : 3		# enter single-user mode on failure.
     38 
     39 	# Do nothing if root file system is not mentioned in /etc/fstab, or if
     40 	# root file system seems to be a network mount, or if root file system
     41 	# is not ffs or if logging is enabled.
     42 	rootdev=""
     43 	while read fs_spec fs_file fs_vfstype fs_mntops fs_freq fs_passno
     44 	do
     45 		# skip comment or blank line
     46 		case "${fs_spec}" in
     47 		\#*|'') continue ;;
     48 		ROOT\.*) fs_spec="/dev/$(sysctl -n kern.root_device)${fs_spec#ROOT.}" ;;
     49 		esac
     50 
     51 		# skip non-root
     52 		if [ "${fs_file}" != "$rootmp" ]; then
     53 			continue
     54 		fi
     55 
     56 		if [ "${fs_vfstype}" != "ffs" ]; then
     57 			echo "Not resizing $rootmp: not an ffs file system"
     58 			return
     59 		fi
     60 
     61 		case "${fs_spec}" in
     62 		*:*)
     63 			echo "Not resizing $rootmp: network mount"
     64 			return
     65 			;;
     66 		esac
     67 
     68 		for opt in $(split_options "${fs_mntops}"); do
     69 			if [ "$opt" = "log" ];  then
     70 				echo "Not resizing $rootmp: logging unsupported"
     71 				return
     72 			fi
     73 		done
     74 
     75 		rootdev=${fs_spec}
     76 		break
     77 	done < "${fstab_file}"
     78 
     79 	if [ -z "$rootdev" ]; then
     80 		echo "Not resizing $rootmp: not listed in ${fstab_file}"
     81 		return
     82 	fi
     83 
     84 	if resize_ffs -c "$rootdev"; then
     85 		echo "Resizing $rootmp ($rootdev)"
     86 		if ! resize_ffs -y $resize_root_flags "$rootdev"; then
     87 		    echo "Error resizing root."
     88 		    stop_boot
     89 		fi
     90 		if [ ! -z "${resize_root_postcmd}" ]; then
     91 			${resize_root_postcmd}
     92 		fi
     93 	else
     94 		echo "Not resizing $rootmp ($rootdev): already correct size"
     95 	fi
     96 	return
     97 }
     98 
     99 load_rc_config $name
    100 run_rc_command "$1"
    101