From 794c8c33758792627113ae98ec495b9856960d92 Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@ubuntu.com>
Date: Sat, 22 Sep 2012 21:19:58 +0100
Subject: [PATCH] Fix grub-emu build on FreeBSD.

* Makefile.util.def (grub-mount): Add LIBGEOM to ldadd.
* grub-core/net/drivers/emu/emunet.c: Only include Linux-specific
headers on Linux.
(GRUB_MOD_INIT): Return immediately on non-Linux platforms; this
implementation is currently Linux-specific.
* util/getroot.c (exec_pipe): Define only on Linux or when either
libzfs or libnvpair is unavailable.
(find_root_devices_from_poolname): Remove unused path variable.
---
 ChangeLog                          | 13 +++++++++++++
 Makefile.util.def                  |  2 +-
 grub-core/net/drivers/emu/emunet.c | 11 +++++++++--
 util/getroot.c                     |  7 ++++++-
 4 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 5db804e2a..3eda38ffe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2012-09-22  Colin Watson  <cjwatson@ubuntu.com>
+
+	Fix grub-emu build on FreeBSD.
+
+	* Makefile.util.def (grub-mount): Add LIBGEOM to ldadd.
+	* grub-core/net/drivers/emu/emunet.c: Only include Linux-specific
+	headers on Linux.
+	(GRUB_MOD_INIT): Return immediately on non-Linux platforms; this
+	implementation is currently Linux-specific.
+	* util/getroot.c (exec_pipe): Define only on Linux or when either
+	libzfs or libnvpair is unavailable.
+	(find_root_devices_from_poolname): Remove unused path variable.
+
 2012-09-19  Colin Watson  <cjwatson@ubuntu.com>
 
 	* grub-core/partmap/msdos.c (pc_partition_map_embed): Revert
diff --git a/Makefile.util.def b/Makefile.util.def
index b80187c81..72057cf5a 100644
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -266,7 +266,7 @@ program = {
   ldadd = libgrubgcry.a;
   ldadd = libgrubkern.a;
   ldadd = grub-core/gnulib/libgnu.a;
-  ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBZFS) $(LIBNVPAIR) -lfuse';
+  ldadd = '$(LIBINTL) $(LIBDEVMAPPER) $(LIBZFS) $(LIBNVPAIR) $(LIBGEOM) -lfuse';
   condition = COND_GRUB_MOUNT;
 };
 
diff --git a/grub-core/net/drivers/emu/emunet.c b/grub-core/net/drivers/emu/emunet.c
index 7a7aeaff6..6b533dde0 100644
--- a/grub-core/net/drivers/emu/emunet.c
+++ b/grub-core/net/drivers/emu/emunet.c
@@ -21,8 +21,10 @@
 #include <sys/socket.h>
 #include <grub/net.h>
 #include <sys/types.h>
-#include <linux/if.h>
-#include <linux/if_tun.h>
+#ifdef __linux__
+# include <linux/if.h>
+# include <linux/if_tun.h>
+#endif /* __linux__ */
 #include <sys/ioctl.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ -97,6 +99,7 @@ static struct grub_net_card emucard =
 
 GRUB_MOD_INIT(emunet)
 {
+#ifdef __linux__
   struct ifreq ifr;
   fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK);
   if (fd < 0)
@@ -110,6 +113,10 @@ GRUB_MOD_INIT(emunet)
       return;
     }
   grub_net_card_register (&emucard);
+#else /* !__linux__ */
+  fd = -1;
+  return;
+#endif /* __linux__ */
 }
 
 GRUB_MOD_FINI(emunet)
diff --git a/util/getroot.c b/util/getroot.c
index b97bea6cb..c2a25c943 100644
--- a/util/getroot.c
+++ b/util/getroot.c
@@ -220,6 +220,9 @@ xgetcwd (void)
 
 #if !defined (__MINGW32__) && !defined (__CYGWIN__) && !defined (__GNU__)
 
+#if (defined (__linux__) || \
+     !defined (HAVE_LIBZFS) || !defined (HAVE_LIBNVPAIR))
+
 static pid_t
 exec_pipe (char **argv, int *fd)
 {
@@ -258,6 +261,8 @@ exec_pipe (char **argv, int *fd)
     }
 }
 
+#endif
+
 static char **
 find_root_devices_from_poolname (char *poolname)
 {
@@ -269,7 +274,7 @@ find_root_devices_from_poolname (char *poolname)
   zpool_handle_t *zpool;
   libzfs_handle_t *libzfs;
   nvlist_t *config, *vdev_tree;
-  nvlist_t **children, **path;
+  nvlist_t **children;
   unsigned int nvlist_count;
   unsigned int i;
   char *device = 0;