gistfile1.txt

SRCS=skelkld.c
KMOD=skeleton

.include <bsd.kmod.mk>

skelkld.c

/*
 * A simple KLD Skeleton example.
 *
 * http://www.freebsd.org/doc/en/books/arch-handbook/driverbasics-kld.html
 *
 */

#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>  /* uprintf */
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>

/*
 * Load handler that deals with the loading and unloading of a KLD.
 */
static int
skel_loader(struct module *m, int what, void *arg)
{
  int err = 0;

  switch (what){
    case MOD_LOAD: /* kldload */
      uprintf("Skeleton KLD loaded.\n");
      break;
    case MOD_UNLOAD: /* kldunload */
      uprintf("Skeleton KLD unloaded.\n");
      break;
    default:
      err = EOPNOTSUPP;
      break;
  }

  return err;
}

/*
 * Declare this module to the rest of the kernel
 */
static moduledata_t skel_mod = {
  "skel",
  skel_loader,
  NULL
};

DECLARE_MODULE(skeleton, skel_mod, SI_SUB_KLD, SI_ORDER_ANY);