dhcpd: try to contain usage of global dhcpd_chroot_path

(cherry picked from commit 5a091c26)

src/etc/inc/services.inc

@@ -372,6 +372,20 @@ function services_radvd_configure($blacklist = array())
     return 0;
 }
 
+function services_dhcpd_leasesfile()
+{
+    global $g;
+
+    return "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
+}
+
+function services_dhcpdv6_leasesfile()
+{
+    global $g;
+
+    return "{$g['dhcpd_chroot_path']}/var/db/dhcpd6.leases";
+}
+
 function services_dhcpd_configure($family = "all", $blacklist = array())
 {
     global $config, $g;

src/www/services_dhcp.php

@@ -35,16 +35,20 @@ require_once("unbound.inc");
 require_once("pfsense-utils.inc");
 require_once("interfaces.inc");
 
-/* This function will remove entries from dhcpd.leases that would otherwise
+/*
+ * This function will remove entries from dhcpd.leases that would otherwise
  * overlap with static DHCP reservations. If we don't clean these out,
  * then DHCP will print a warning in the logs about a duplicate lease
  */
-function dhcp_clean_leases() {
-    global $g, $config;
-    $leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
+function dhcp_clean_leases()
+{
+    global $config;
+
+    $leasesfile = services_dhcpd_leasesfile();
     if (!file_exists($leasesfile)) {
         return;
     }
+
     /* Build list of static MACs */
     $staticmacs = array();
     foreach($config['interfaces'] as $ifname => $ifarr) {

src/www/services_dhcpv6.php

@@ -42,15 +42,14 @@ require_once("services.inc");
  */
 function reconfigure_dhcpd()
 {
-    killbypid("{$g['dhcpd_chroot_path']}/var/run/dhcpdv6.pid");
-    /* dnsmasq_configure calls dhcpd_configure */
-    /* no need to restart dhcpd twice */
+    /* services_dnsmasq_configure calls services_dhcpd_configure */
     if (isset($config['dnsmasq']['enable']) && isset($config['dnsmasq']['regdhcpstatic']))  {
         $retvaldns = services_dnsmasq_configure();
         if ($retvaldns == 0) {
             clear_subsystem_dirty('hosts');
             clear_subsystem_dirty('staticmaps');
         }
+    /* services_unbound_configure calls services_dhcpd_configure */
     } elseif (isset($config['unbound']['enable']) && isset($config['unbound']['regdhcpstatic'])) {
         $retvaldns = services_unbound_configure();
         if ($retvaldns == 0) {

src/www/status_dhcp_leases.php

@@ -75,7 +75,7 @@ function remove_duplicate($array, $field)
     return $new;
 }
 
-$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
+$leasesfile = services_dhcpd_leasesfile();
 
 if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     $awk = "/usr/bin/awk";

src/www/status_dhcpv6_leases.php

@@ -98,8 +98,7 @@ function parse_duid($duid_string) {
     return array($iaid, $duid);
 }
 
-
-$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd6.leases";
+$leasesfile = services_dhcpdv6_leasesfile();
 
 if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     $awk = "/usr/bin/awk";