2009-04-13  Felix Zielcke  <address@hidden>

	util/hostdisk.c [__FreeBSD_kernel]: Include <sys/param.h> and
	<sys/sysctl.h>
	(open_device) [__FreeBSD_kernel_]: Use sysctlgetbyname() to add 0x10 to
	`kern.geom.debugflags', before opening the device and reset them afterwards.

Index: util/hostdisk.c
===================================================================
--- util/hostdisk.c	(revision 2094)
+++ util/hostdisk.c	(working copy)
@@ -90,6 +90,11 @@ struct hd_geometry
 # include <sys/disk.h> /* DIOCGMEDIASIZE */
 #endif
 
+#ifdef __FreeBSD_kernel__
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#endif
+
 struct
 {
   char *drive;
@@ -340,7 +345,24 @@ open_device (const grub_disk_t disk, gru
       sector -= disk->partition->start;
   }
 #else /* ! __linux__ */
+#if defined __FreeBSD_kernel__
+  int sysctl_flags, sysctl_oldflags;
+  size_t sysctl_size = sizeof (sysctl_flags);
+
+  if (sysctlbyname ("kern.geom.debugflags", &sysctl_oldflags, &sysctl_size, NULL, 0))
+    grub_util_error ("cannot get current flags of sysctl kern.geom.debugflags");
+  sysctl_flags = sysctl_oldflags |= 0x10;
+  if (sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_flags, sysctl_size))
+    grub_util_error ("cannot set flags of sysctl kern.geom.debugflags");
+#endif
+
   fd = open (map[disk->id].device, flags);
+
+#if defined __FreeBSD_kernel__
+  if (sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_oldflags, sysctl_size))
+    grub_util_error ("cannot set flags back to the old value for sysctl kern.geom.debugflags");
+#endif
+
   if (fd < 0)
     {
       grub_error (GRUB_ERR_BAD_DEVICE, "cannot open `%s' in open_device()", map[disk->id].device);