[PATCH] remove usage of expr in ide-devfs.sh

[elogind.git] / extras / ide-devfs.sh

diff --git a/extras/ide-devfs.sh b/extras/ide-devfs.sh
index 8648f6c0c06d7c97678cef10f9bc7993394a693f..e5bf177f8b2909fb8a95c1418965b340d5d98f8d 100644 (file)
--- 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