fix search/replace for ash

1 files changed, 5 insertions, 3 deletions

diff --git a/slx-tools b/slx-tools
index 02703de..ed6a8ed 100644
--- a/slx-tools
+++ b/slx-tools
@@ -29,7 +29,8 @@ is_volatile() {
 	[ -z "$1" ] && return 2
 	local _dev="$(get_backing_dev "$1")"
 	[ -z "$_dev" ] && return 0
-	[ "$_dev" = "${_dev//\/dev\/mapper/}" ] && return 1
+	# NOTE: ash does not search/replace when the expression is surrounded by quotes
+	[ "x$_dev" = "x"${_dev//\/dev\/mapper/} ] && return 1
 	local _mp="$(get_backing_dev_mp "$1")"
 	[ -z "$_mp" ] && return 2
 	# it is a device mapper device, check if it was setup in dracut's initramfs.
@@ -42,8 +43,9 @@ is_volatile() {
 
 get_dm_backing_size() {
 	[ -z "$1" ] && return 1
-	local _dev="$(get_backing_part $1)"
-	[ "$_dev" = "${_dev//\/dev\/mapper/}" ] && return 1
+	local _dev="$(get_backing_dev $1)"
+	# NOTE: ash does not search/replace when the expression is surrounded by quotes
+	[ "x$_dev" = "x"${_dev//\/dev\/mapper/} ] && return 1
 	local _dm_line="$(grep -m1 -E "^${_dev}\s+/\s+type=[^0]" "$dmstate")"
 	[ -z "$_dm_line" ] && return 1
 	local _dm_dev_size="$(echo "$_dm_line" | grep -Po '(?<=physical_size=|virtual_size=)\w*' )"