X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=extras%2Fide-devfs.sh;h=e5bf177f8b2909fb8a95c1418965b340d5d98f8d;hp=8648f6c0c06d7c97678cef10f9bc7993394a693f;hb=b7b6562729a661f6ebf4576e9ce90e9228315e93;hpb=33084f1e2ac5187e326e7fdf827506d438e656ed

diff --git a/extras/ide-devfs.sh b/extras/ide-devfs.sh
index 8648f6c0c..e5bf177f8 100644
--- a/extras/ide-devfs.sh
+++ b/extras/ide-devfs.sh
@@ -2,13 +2,13 @@
 
 # udev external PROGRAM script
 # return devfs-names for ide-devices
-# BUS="ide", KERNEL="hd*", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", NAME="%k", SYMLINK="%1c %2c"
+# BUS="ide", KERNEL="hd*", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", NAME="%k", SYMLINK="%c{1} %c{2}"
 
 HOST="${2%\.[0-9]}"
 TARGET="${2#[0-9]\.}"
 
 if [ -z "${HOST#[13579]}" ]; then
-	HOST=`expr ${HOST} - 1`
+	HOST=$((${HOST} - 1))
 	BUS="1"
 else
 	BUS="0"
@@ -18,13 +18,13 @@ get_dev_number() {
 	local x=
 	local num=0
 	local MEDIA=
-	local DRIVE="${1%[0-9]*}"
+	local DRIVE="${1%%[0-9]*}"
 
 	for x in /proc/ide/*/media; do
 		if [ -e "${x}" ]; then
 			MEDIA=`cat ${x}`
 			if [ "${MEDIA}" = "$2" ]; then
-				num=`expr ${num} + 1`
+				num=$((${num} + 1))
 			fi
 			if [ "${x}" = "/proc/ide/${DRIVE}/media" ]; then
 				break
@@ -32,7 +32,7 @@ get_dev_number() {
 		fi
 	done
 	
-	echo `expr ${num} - 1`
+	echo $((${num} - 1))
 }
 
 if [ -z "$3" ]; then