text: #include	"unp.h"
  
  /*
   * This is a placeholder if the system does not provide this RFC 2133
   * function.  If routing sockets with sysctl() are provided, then the
   * if_XXX() functions in the libroute/ directory will replace these.
   */
  
  struct if_nameindex *
  if_nameindex(void)
  {
  	return(NULL);
  }
  
  void
  if_freenameindex(struct if_nameindex *ptr)
  {
  }
  
  struct if_nameindex *
  If_nameindex(void)
  {
  	struct if_nameindex	*ifptr;
  
  	if ( (ifptr = if_nameindex()) == NULL)
  		err_quit("if_nameindex error");
  	return(ifptr);
  }
  