File pptpd-stringcompare.patch of Package pptpd

--- bcrelay.c
+++ bcrelay.c
@@ -381,12 +381,12 @@
                         return 1;
                 }
   }
-  if (ifin == "") {
+  if (!strlen(ifin)) {
        syslog(LOG_INFO,"Incoming interface required!");
        showusage(argv[0]);
        _exit(1);
   }
-  if (ifout == "" && ipsec == "") {
+  if (!strlen(ifout) && !strlen(ipsec)) {
        syslog(LOG_INFO,"Listen-mode or outgoing or IPsec interface required!");
        showusage(argv[0]);
        _exit(1);
@@ -870,7 +870,7 @@
     // IPSEC tunnels are a fun one.  We must change the destination address
     // so that it will be routed to the correct tunnel end point.
     // We can define several tunnel end points for the same ipsec interface.
-    } else if (ipsec != "" && strncmp(ifs.ifc_req[i].ifr_name, "ipsec", 5) == 0) {
+    } else if (strlen(ipsec) && strncmp(ifs.ifc_req[i].ifr_name, "ipsec", 5) == 0) {
       if (strncmp(ifs.ifc_req[i].ifr_name, ipsec, 6) == 0) {
         struct hostent *hp = gethostbyname(ipsec+7);
         ioctl(s, SIOCGIFINDEX, &ifs.ifc_req[i]);