usr_sbin/grml-config-root: Fix a couple of shellcheck warnings

- SC2006: Use $(..) instead of legacy `..`.
- SC2230: which is non-standard. Use builtin 'command -v' instead.
- SC2086: Double quote to prevent globbing and word splitting.

diff --git a/usr_sbin/grml-config-root b/usr_sbin/grml-config-root
index e1e1158..db6a2a5 100755 (executable)
--- a/usr_sbin/grml-config-root
+++ b/usr_sbin/grml-config-root
@@ -9,8 +9,8 @@
 PATH=${PATH:-'/bin/:/sbin/:/usr/bin:/usr/sbin'}
 
 # set up some variables
 PATH=${PATH:-'/bin/:/sbin/:/usr/bin:/usr/sbin'}
 
 # set up some variables

-DIALOG=`which dialog`
-PN=$(basename $0)
+DIALOG=$(command -v dialog)
+PN=$(basename "$0")

 
 if [ "$(id -ru)" != "0" ] ; then
         $DIALOG --msgbox "Error: $0 requires root permissions. Exiting." 0 0
 
 if [ "$(id -ru)" != "0" ] ; then
         $DIALOG --msgbox "Error: $0 requires root permissions. Exiting." 0 0