ipaddr=$(nvram get ${iface}_ipaddr)
netmask=$(nvram get ${iface}_netmask)
-# check for existing DHCP server
-udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
+(
+ # check for existing DHCP server
+ udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
- ipaddr=$(ip2int $ipaddr)
- netmask=$(ip2int ${netmask:-255.255.255.0})
- network=$((ipaddr&netmask))
-
- start=$(nvram get dhcp_start)
- start=$((network+${start:-100}))
- end=$(nvram get dhcp_num)
- end=$((start+${end:-150}))
-
- args="-K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
-}
-dnsmasq ${args}
+ ipaddr=$(ip2int $ipaddr)
+ netmask=$(ip2int ${netmask:-255.255.255.0})
+ network=$((ipaddr&netmask))
+
+ start=$(nvram get dhcp_start)
+ start=$((network+${start:-100}))
+ end=$(nvram get dhcp_num)
+ end=$((start+${end:-150}))
+
+ args="-l /tmp/dhcp.leases -K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
+ }
+ dnsmasq ${args}
+) &