From 62858144fe582fe4a908d277842cd50e00eba634 Mon Sep 17 00:00:00 2001
From: Robert Millan <rmh@aybabtu.com>
Date: Wed, 4 Aug 2010 00:15:29 +0200
Subject: [PATCH] 2010-08-04  Robert Millan  <rmh@gnu.org>

	Support OpenSolaris in ZFS device resolution.

	* configure.ac: Check for getmntany().
	* kern/emu/misc.c [HAVE_GETMNTANY]: Include `<sys/mnttab.h>'.
	[HAVE_GETMNTANY] (grub_find_zpool_from_mount_point): Add OpenSolaris
	support.
---
 ChangeLog       |  9 +++++++++
 configure.ac    |  2 +-
 kern/emu/misc.c | 24 +++++++++++++++++++++++-
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b3e7bc67f..958c55c79 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2010-08-04  Robert Millan  <rmh@gnu.org>
+
+	Support OpenSolaris in ZFS device resolution.
+
+	* configure.ac: Check for getmntany().
+	* kern/emu/misc.c [HAVE_GETMNTANY]: Include `<sys/mnttab.h>'.
+	[HAVE_GETMNTANY] (grub_find_zpool_from_mount_point): Add OpenSolaris
+	support.
+
 2010-08-03  Robert Millan  <rmh@gnu.org>
 
 	Fix grub-emu build.
diff --git a/configure.ac b/configure.ac
index 6169a2fb5..41072eb4f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -247,7 +247,7 @@ else
 fi
 
 # Check for functions and headers.
-AC_CHECK_FUNCS(posix_memalign memalign asprintf vasprintf getfsstat)
+AC_CHECK_FUNCS(posix_memalign memalign asprintf vasprintf getfsstat getmntany)
 AC_CHECK_HEADERS(libzfs.h libnvpair.h)
 
 # For opendisk() and getrawpartition() on NetBSD.
diff --git a/kern/emu/misc.c b/kern/emu/misc.c
index 0838dc3c0..5a148c708 100644
--- a/kern/emu/misc.c
+++ b/kern/emu/misc.c
@@ -32,6 +32,10 @@
 #include <limits.h>
 #endif
 
+#ifdef HAVE_GETMNTANY
+# include <sys/mnttab.h>
+#endif
+
 #include <grub/mm.h>
 #include <grub/err.h>
 #include <grub/env.h>
@@ -340,7 +344,7 @@ grub_find_zpool_from_mount_point (const char *mnt_point, char **poolname, char *
 
   *poolname = *poolfs = NULL;
 
-#ifdef HAVE_GETFSSTAT
+#if defined(HAVE_GETFSSTAT) /* FreeBSD and GNU/kFreeBSD */
   {
     int mnt_count = getfsstat (NULL, 0, MNT_WAIT);
     if (mnt_count == -1)
@@ -363,6 +367,24 @@ grub_find_zpool_from_mount_point (const char *mnt_point, char **poolname, char *
 
     free (mnt);
   }
+#elif defined(HAVE_GETMNTANY) /* OpenSolaris */
+  {
+    FILE *mnttab = fopen ("/etc/mnttab", "r");
+    struct mnttab mp;
+    struct mnttab mpref =
+      {
+	.mnt_special = NULL,
+	.mnt_mountp = mnt_point,
+	.mnt_fstype = "zfs",
+	.mnt_mntopts = NULL,
+	.mnt_time = NULL,
+      };
+
+    if (getmntany (mnttab, &mp, &mpref) == 0)
+      *poolname = xstrdup (mp.mnt_special);
+
+    fclose (mnttab);
+  }
 #endif
 
   if (! *poolname)