ctdb-scripts: Avoid shellcheck warning SC2004 ($ in arithmetic)

SC2004: $/${} is unnecessary on arithmetic variables.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

ctdb/config/ctdbd_wrapper

@@ -263,7 +263,7 @@ start()
 	    fi
 	fi
 
-	_count=$(($_count + 1))
+	_count=$((_count + 1))
 	sleep 1
     done
 
@@ -292,7 +292,7 @@ stop()
 	    break
 	fi
 
-	_count=$(($_count + 1))
+	_count=$((_count + 1))
 	sleep 1
     done
 

ctdb/config/events.d/13.per_ip_routing

@@ -48,7 +48,7 @@ ipv4_is_valid_addr()
 	if ! [ 0 -le $_o -a $_o -le 255 ] 2>/dev/null ; then
 	    return 1
 	fi
-	_count=$(($_count + 1))
+	_count=$((_count + 1))
     done
 
     # A valid IPv4 address has 4 octets
@@ -75,18 +75,18 @@ ipv4_host_addr_to_net ()
     # the octets and doing the math.
     _host_ul=0
     for _o in $(export IFS="." ; echo $_host) ; do
-	_host_ul=$(( ($_host_ul << 8) + $_o)) # work around Emacs color bug
+	_host_ul=$(( (_host_ul << 8) + _o)) # work around Emacs color bug
     done
 
     # Calculate the mask and apply it.
-    _mask_ul=$(( 0xffffffff << (32 - $_maskbits) ))
-    _net_ul=$(( $_host_ul & $_mask_ul ))
+    _mask_ul=$(( 0xffffffff << (32 - _maskbits) ))
+    _net_ul=$(( _host_ul & _mask_ul ))
  
     # Now convert to a network address one byte at a time.
     _net=""
     for _o in $(seq 1 4) ; do
-	_net="$(($_net_ul & 255))${_net:+.}${_net}"
-	_net_ul=$(($_net_ul >> 8))
+	_net="$((_net_ul & 255))${_net:+.}${_net}"
+	_net_ul=$((_net_ul >> 8))
     done
 
     echo "${_net}/${_maskbits}"
@@ -142,7 +142,7 @@ ensure_table_id_for_ip ()
 	    # redirect stops error spam for a non-numeric value.
 	    if [ $_new -le $_t -a \
 		$_t -le $CTDB_PER_IP_ROUTING_TABLE_ID_HIGH ] 2>/dev/null ; then
-		_new=$(($_t + 1))
+		_new=$((_t + 1))
 	    fi
 	done
 

ctdb/config/events.d/20.multipathd

@@ -49,7 +49,7 @@ multipathd_check()
     _timeleft=10
 
     while [ $_timeleft -gt 0 ]; do
-	_timeleft=$(($_timeleft - 1))
+	_timeleft=$((_timeleft - 1))
 
 	# see if the process still exists
 	kill -0 $_pid >/dev/null 2>&1 || {

ctdb/config/events.d/60.nfs

@@ -153,7 +153,7 @@ nfs_check_service ()
 	fi
 
 	if [ $restart_every -gt 0 ] ; then
-	    if [ $(($_failcount % $restart_every)) -eq 0 ] ; then
+	    if [ $((_failcount % restart_every)) -eq 0 ] ; then
 		if ! $_unhealthy ; then
 		    echo "WARNING: $_err"
 		fi

ctdb/config/functions

@@ -306,7 +306,7 @@ program_stack_traces ()
 	if [ -n "$_stack" ] ; then
 	    echo "Stack trace for ${_prog}[${_pid}]:"
 	    echo "$_stack"
-	    _count=$(($_count + 1))
+	    _count=$((_count + 1))
 	fi
     done
 }
@@ -475,7 +475,7 @@ kill_tcp_connections ()
 		_connections="${_connections}${_nl}${_dst} ${_src}"
 	    fi
 
-	    _killcount=$(($_killcount + 1))
+	    _killcount=$((_killcount + 1))
 	done
 
 	if [ $_killcount -eq 0 ] ; then

ctdb/config/statd-callout

@@ -192,7 +192,7 @@ case "$1" in
 		"$smnotify" --client="$cip" --ip="$sip" \
 			    --server="$NFS_HOSTNAME" --stateval="$stateval"
 		# Send notifies for server startup
-		stateval=$(($stateval + 1))
+		stateval=$((stateval + 1))
 		"$smnotify" --client="$cip" --ip="$sip" \
 			    --server="$sip" --stateval="$stateval"
 		"$smnotify" --client="$cip" --ip="$sip" \