Improved error message for failure to get h/ware address.

Put helpmsg on inverse bg.

CHANGES

@@ -8,6 +8,7 @@ On-the-fly filter code changes
 Shell escape
 Alternative resolver back-ends
 Improved totals display
+Added regexp based screen filtering 
 
 0.9 22/10/02
 

iftop.c

@@ -353,6 +353,7 @@ void packet_init() {
     strncpy(ifr.ifr_name, options.interface, IFNAMSIZ);
     ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
     if (ioctl(s, SIOCGIFHWADDR, &ifr) == -1) {
+        fprintf(stderr, "Error getting hardware address for interface: %s\n", options.interface); 
         perror("ioctl(SIOCGIFHWADDR)");
         exit(1);
     }

ui.c

@@ -558,7 +558,9 @@ void ui_print() {
     if(showhelphint) {
       mvaddstr(0, 0, helpmsg);
       clrtoeol();
+      mvchgat(0, 0, -1, A_REVERSE, 0, NULL);
     }
+    move(LINES - 1, COLS - 1);
     
     refresh();