Bug 12545

	  In the -current kldload(8) returns 0 (success), if error occur in
	*_module_handler(..., MOD_LOAD, ...), because of
	kern_module.c:module_register_init() and
	kern_linker.c:linker_file_sysinit() are of type void.
	  As I can see, change their type not so easy :) , so we can't (???)
	solve the problem in kldload(2). But kldload(8) can at least try to
	resolve post-loading situation and returns different exit status for:
	  1) loaded file doesn't contains modules at all (f.e. EX_SOFTWARE);
	  2) loaded file contains some modules (f.e. number_of_modules);
	  Unfortunately, so we will not success code (EX_OK), because of we
	can't know, what number of modules loaded file must contains, if
	loading is successful. But case 1) will be reliably distinguished.
	  We can also unload file in the case 1).

Fix: Here is a patches for kldload.c v 1.5 :

--------------------------------------------------------------------
	and for kldload.8 v 1.5 :



-----------------------------------------------------------------------------9zDE0TDMlx5txDS5G2HpQ2USAjHcfGyqZ725yX3o7DzJW9wy
Content-Type: text/plain; name="file.diff"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="file.diff"

*** kldload.c.orig	Wed Jul  7 11:12:55 1999
--- kldload.c	Wed Jul  7 11:30:36 1999
***************
*** 34,39 ****
--- 34,41 ----
  #include <unistd.h>
  #include <sys/param.h>
  #include <sys/linker.h>
+ #include <sys/module.h>
+ #include <sysexits.h>
  
  static void
  usage(void)
***************
*** 48,53 ****
--- 50,56 ----
      int c;
      int verbose = 0;
      int fileid;
+     int modid, mod_cnt = 0;
  
      while ((c = getopt(argc, argv, "v")) != -1)
  	switch (c) {
***************
*** 65,74 ****
  
      fileid = kldload(argv[0]);
      if (fileid < 0)
! 	err(1, "can't load %s", argv[0]);
!     else
  	if (verbose)
! 	    printf("Loaded %s, id=%d\n", argv[0], fileid);
  
!     return 0;
  }
--- 68,86 ----
  
      fileid = kldload(argv[0]);
      if (fileid < 0)
! 	err(EX_OSERR, "can't load %s", argv[0]);
! 
!     for (modid = kldfirstmod(fileid); modid > 0; modid = modfnext(modid))
! 	mod_cnt++;
! 
!     if (!mod_cnt) {
! 	if (kldunload(fileid) < 0)
! 	    err(EX_OSERR, "can't unload file");
!     } else {
  	if (verbose)
! 	    printf("Loaded %s, id=%d with %d modules\n",
! 		argv[0], fileid, mod_cnt);
!     }
  
!     return (mod_cnt ? mod_cnt : EX_SOFTWARE);
  }