Reset IFS variable

Setting and unsetting the IFS variable is tricky. To be on the
safe side we should always reset the IFS variable to its original
value after parsing.

Signed-off-by: Hannes Reinecke <hare@suse.de>

modules.d/95dasd/parse-dasd.sh

@@ -1,8 +1,10 @@
 #!/bin/sh
 for dasd_arg in $(getargs rd.dasd= -d rd_DASD= DASD=); do
     (
+        local OLDIFS="$IFS"
         IFS=","
         set -- $dasd_arg
+        IFS="$OLDIFS"
         echo "$@" | normalize_dasd_arg >> /etc/dasd.conf
     )
 done

modules.d/95dasd_rules/parse-dasd.sh

@@ -59,8 +59,10 @@ for dasd_arg in $(getargs root=) $(getargs resume=); do
                 ;;
         esac
         if [ -n "$ccw_arg" ] ; then
+            OLDIFS="$IFS"
             IFS="-"
             set -- $ccw_arg
+            IFS="$OLDIFS"
             create_udev_rule $2
         fi
     )
@@ -68,9 +70,10 @@ done
 
 for dasd_arg in $(getargs rd.dasd=); do
     (
+        OLDIFS="$IFS"
         IFS=","
         set -- $dasd_arg
-        unset IFS
+        IFS="$OLDIFS"
         while (($# > 0)); do
             case $1 in
                 autodetect|probeonly)
@@ -78,13 +81,14 @@ for dasd_arg in $(getargs rd.dasd=); do
                     ;;
                 *-*)
                     range=$1
+                    OLDIFS="$IFS"
                     IFS="-"
                     set -- $range
                     start=${1#0.0.}
                     shift
                     end=${1#0.0.}
                     shift
-                    unset IFS
+                    IFS="$OLDIFS"
                     for dev in $(seq $(( 16#$start )) $(( 16#$end )) ) ; do
                         create_udev_rule $(printf "0.0.%04x" "$dev")
                     done

modules.d/95zfcp_rules/parse-zfcp.sh

@@ -55,8 +55,10 @@ fi
 
 for zfcp_arg in $(getargs rd.zfcp); do
     (
+        OLDIFS="$IFS"
         IFS=","
         set $zfcp_arg
+        IFS="$OLDIFS"
         create_udev_rule $1 $2 $3
     )
 done
@@ -72,8 +74,10 @@ for zfcp_arg in $(getargs root=) $(getargs resume=); do
                 ;;
         esac
         if [ -n "$ccw_arg" ] ; then
+            OLDIFS="$IFS"
             IFS="-"
             set -- $ccw_arg
+            IFS="$OLDIFS"
             _wwpn=${4%:*}
             _lun=${4#*:}
             create_udev_rule $2 $wwpn $lun