NetBSD/etc/rc.d/resize_root

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#!/bin/sh
#
# $NetBSD: resize_root,v 1.3 2015/04/07 18:02:11 jmcneill Exp $
#
# PROVIDE: resize_root
# REQUIRE: fsck_root
# KEYWORD: interactive
$_rc_subr_loaded . /etc/rc.subr
name="resize_root"
rcvar=$name
start_cmd="resize_root_start"
stop_cmd=":"
fstab_file=/etc/fstab
rootmp="/"
split_options()
{
local IFS
IFS=,
OPTS=$1
for i in $OPTS; do
echo $i
done
}
resize_root_start()
{
# if ! checkyesno $rcvar; then
# echo "Not resizing $rootmp: resize_root must be set to YES/yes/..."
# return
# fi
trap : 2 # Ignore SIGINT, SIGQUIT, so we
trap : 3 # enter single-user mode on failure.
# Do nothing if root file system is not mentioned in /etc/fstab, or if
# root file system seems to be a network mount, or if root file system
# is not ffs or if logging is enabled.
rootdev=""
while read fs_spec fs_file fs_vfstype fs_mntops fs_freq fs_passno
do
# skip comment or blank line
case "${fs_spec}" in
\#*|'') continue ;;
esac
# skip non-root
if [ "${fs_file}" != "$rootmp" ]; then
continue
fi
if [ "${fs_vfstype}" != "ffs" ]; then
echo "Not resizing $rootmp: not an ffs file system"
return
fi
case "${fs_spec}" in
*:*)
echo "Not resizing $rootmp: network mount"
return
;;
esac
for opt in $(split_options "${fs_mntops}"); do
if [ "$opt" = "log" ]; then
echo "Not resizing $rootmp: logging unsupported"
return
fi
done
rootdev=${fs_spec%/*}/r${fs_spec##*/}
break
done < "${fstab_file}"
if [ -z "$rootdev" ]; then
echo "Not resizing $rootmp: not listed in ${fstab_file}"
return
fi
if resize_ffs -c $rootdev; then
echo "Resizing $rootmp"
if ! resize_ffs -y $resize_root_flags $rootdev; then
echo "Error resizing root."
stop_boot
fi
if [ ! -z "${resize_root_postcmd}" ]; then
${resize_root_postcmd}
fi
else
echo "Not resizing $rootmp: already correct size"
fi
return
}
load_rc_config $name
run_rc_command "$1"