8485 Remove set but unused variables in usr/src/cmd

@@ -1,6 +1,7 @@
 /*
+ * Copyright 2017 Gary Mills
  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  *
  * Licensed under the Academic Free License version 2.1
  */
 

@@ -111,11 +112,11 @@
 }
 
 static char *
 pseudo_serialno_from_addr(char *name)
 {
-        int sd, rc, errnum;
+        int sd, errnum;
         char buf[128];
         struct hostent *hp;
         struct xarpreq ar;
 
         if (name == NULL)

@@ -138,11 +139,11 @@
         }
 
         sd = socket(AF_INET, SOCK_DGRAM, 0);
 
         ar.xarp_ha.sdl_family = AF_LINK;
-        rc = ioctl(sd, SIOCGXARP, (caddr_t)&ar);
+        (void) ioctl(sd, SIOCGXARP, (caddr_t)&ar);
 
         close(sd);
 
         if (ar.xarp_flags & ATF_COM) {  /* use the MAC address */
                 uchar_t *ea = (uchar_t *)LLADDR(&ar.xarp_ha);