[PATCH] Reimplement 10_freebsd.in using 10_linux.in

[Robert Millan <rmh@aybabtu.com>]

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This patch reimplements 10_freebsd.in using 10_linux.in as a base, with
the kFreeBSD-specific parts of 10_freebsd.in.

The new version brings in support for multiple kernel versions (the reason
for the rewrite) and also handling of acpi.ko.

It is diffed against 10_linux.in, since the old code structure is no longer
used.

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

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--- util/grub.d/10_linux.in	2009-08-07 14:04:34.000000000 +0200
+++ util/grub.d/10_freebsd.in	2009-08-07 14:09:05.000000000 +0200
@@ -21,82 +21,79 @@
 libdir=@libdir@
 . ${libdir}/grub/grub-mkconfig_lib
 
-if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
-  OS=GNU/Linux
-else
-  OS="${GRUB_DISTRIBUTOR} GNU/Linux"
-fi
-
-# loop-AES arranges things so that /dev/loop/X can be our root device, but
-# the initrds that Linux uses don't like that.
-case ${GRUB_DEVICE} in
-  /dev/loop/*|/dev/loop[0-9])
-    GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
-  ;;
+case "${GRUB_DISTRIBUTOR}" in
+  Debian)	OS="${GRUB_DISTRIBUTOR} GNU/kFreeBSD" ;;
+  *)		OS="FreeBSD" ;;
 esac
 
-if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
-    || ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" ; then
-  LINUX_ROOT_DEVICE=${GRUB_DEVICE}
-else
-  LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
-fi
-
-linux_entry ()
+kfreebsd_entry ()
 {
   cat << EOF
 menuentry "$1" {
 EOF
   prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/\t/"
   cat << EOF
-	linux	${rel_dirname}/${basename} root=${linux_root_device_thisversion} ro $2
+	freebsd			${rel_dirname}/${basename}
+EOF
+
+  if test -n "${devices}" ; then
+    cat << EOF
+	freebsd_loadenv		${devices_rel_dirname}/${devices_basename}
 EOF
-  if test -n "${initrd}" ; then
+  fi
+
+  if test -n "${acpi_ko}" ; then
     cat << EOF
-	initrd	${rel_dirname}/${initrd}
+	freebsd_module_elf	${acpi_ko_rel_dirname}/${acpi_ko_basename}
 EOF
   fi
+
   cat << EOF
+	set FreeBSD.vfs.root.mountfrom=${kfreebsd_fs}:${GRUB_DEVICE}
+	set FreeBSD.vfs.root.mountfrom.options=rw
 }
 EOF
 }
 
-list=`for i in /boot/vmlinu[xz]-* /vmlinu[xz]-* ; do
+list=`for i in /boot/kfreebsd-* /boot/kernel/kernel ; do
         if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
       done`
 
 while [ "x$list" != "x" ] ; do
-  linux=`version_find_latest $list`
-  echo "Found linux image: $linux" >&2
-  basename=`basename $linux`
-  dirname=`dirname $linux`
+  kfreebsd=`version_find_latest $list`
+  echo "Found kernel of FreeBSD: $kfreebsd" >&2
+  basename=`basename $kfreebsd`
+  dirname=`dirname $kfreebsd`
   rel_dirname=`make_system_path_relative_to_its_root $dirname`
-  version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`
+
+  if [ x"$devices" != "x" ] ; then
+    devices_basename=`basename $devices`
+    devices_dirname=`dirname $devices`
+    devices_rel_dirname=`make_system_path_relative_to_its_root $devices_dirname`
+  fi
+
+  # For "ufs" it's the same.  Do we care about the others?
+  kfreebsd_fs=${GRUB_FS}
+
+  version=`echo $basename | sed -e "s,^[^0-9]*-,,g;s/\.gz$//g"`
   alt_version=`echo $version | sed -e "s,\.old$,,g"`
-  linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
 
-  initrd=
-  for i in "initrd.img-${version}" "initrd-${version}.img" \
-	   "initrd-${version}" "initrd.img-${alt_version}" \
-	   "initrd-${alt_version}.img" "initrd-${alt_version}"; do
-    if test -e "${dirname}/${i}" ; then
-      initrd="$i"
+  acpi_ko=
+  for i in "/lib/modules/${version}/acpi.ko" "/lib/modules/${alt_version}/acpi.ko" \
+      "/boot/kernel/acpi.ko"; do
+    if test -e "$i" ; then
+      acpi_ko="$i"
       break
     fi
   done
-  if test -n "${initrd}" ; then
-    echo "Found initrd image: ${dirname}/${initrd}" >&2
-  else
-    # "UUID=" magic is parsed by initrds.  Since there's no initrd, it can't work here.
-    linux_root_device_thisversion=${GRUB_DEVICE}
+  if test -n "${acpi_ko}" ; then
+    echo "Found ACPI module: ${acpi_ko}" >&2
+    acpi_ko_basename=`basename ${acpi_ko}`
+    acpi_ko_dirname=`dirname ${acpi_ko}`
+    acpi_ko_rel_dirname=`make_system_path_relative_to_its_root $acpi_ko_dirname`
   fi
 
-  linux_entry "${OS}, Linux ${version}" \
-      "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
-  if [ "x${GRUB_DISABLE_LINUX_RECOVERY}" != "xtrue" ]; then
-    linux_entry "${OS}, Linux ${version} (recovery mode)" \
-	"single ${GRUB_CMDLINE_LINUX}"
-  fi
+  kfreebsd_entry "${OS}, kFreeBSD ${version}"
 
-  list=`echo $list | tr ' ' '\n' | grep -vx $linux | tr '\n' ' '`
+  list=`echo $list | tr ' ' '\n' | grep -vx $kfreebsd | tr '\n' ' '`
 done