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#!/bin/sh
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
# USA.
PREREQ=""
prereqs() {
echo "$PREREQ"
}
pause_error() {
local _ignored
#exit 1 # won't work; initramfs-tools ignores hook script exit code
echo "" >&2
# Script is called from update-initramfs which in turn can be
# called manually by the admin from the CLI or via various
# postinst and trigger hooks or from the installer.
#
# If debconf appears to be running then it is important that
# we do not block on stdin since this would hang the
# installer.
if [ "$DEBIAN_HAS_FRONTEND" ] || [ "$DEBIAN_FRONTEND" ]; then
echo "Unable to abort; system will probably be broken!" >&2
else
echo "Press Ctrl-C to abort build, or Enter to continue" >&2
read _ignored
fi
}
case $1 in
prereqs)
prereqs
exit 0
;;
esac
FK_DIR="/usr/share/flash-kernel"
. "${FK_CHECKOUT:-$FK_DIR}/functions"
. /usr/share/initramfs-tools/hook-functions
# Record the root filesystem device for use during boot
rootdev=$(egrep '^[^# ]+[ ]+/[ ]' /etc/fstab | awk '{print $1}') || true
# Map LVM devices in the form of /dev/vg/lv to /dev/mapper/..., otherwise
# initramfs won't initialize them.
if [ -n "$rootdev" ]; then
path=$(readlink -f $rootdev)
if echo "$path" | grep -q "^/dev/mapper/"; then
rootdev=$path
fi
fi
# Translate LABEL, UUID, and PARTUUID entries into a proper device name.
if echo "$rootdev" | grep -q "="; then
a=$(echo "$rootdev" | cut -d "=" -f 1)
b=$(echo "$rootdev" | cut -d "=" -f 2- | sed -e 's/^"\(.*\)"$/\1/')
case "$a" in
LABEL)
c=$(echo "$b" | sed 's#/#\\x2f#g')
if [ -e /dev/disk/by-label/$c ]; then
rootdev="/dev/disk/by-label/$c"
else
echo "Label $b not found in /dev/disk/by-label" >&2
fi
;;
UUID)
rootdev=/dev/disk/by-uuid/$b
if [ ! -e $rootdev ]; then
echo "UUID $b doesn't exist in /dev/disk/by-uuid" >&2
fi
;;
PARTUUID)
rootdev=/dev/disk/by-partuuid/$b
if [ ! -e $rootdev ]; then
echo "PARTUUID $b doesn't exist in /dev/disk/by-partuuid" >&2
fi
;;
PARTLABEL)
rootdev=/dev/disk/by-partlabel/$b
if [ ! -e $rootdev ]; then
echo "PARTLABEL $b doesn't exist in /dev/disk/by-partlabel" >&2
fi
;;
*)
echo "/etc/fstab parse error; cannot recognize root $rootdev" >&2
rootdev=/dev/sda2
echo "guessing that the root device is $rootdev" >&2
;;
esac
fi
# Most mount options don't matter for the initial boot, but some are
# vital, make sure we preserve them
rootfstype=$(egrep '^[^# ]+[ ]+/[ ]' /etc/fstab | awk '{print $3}') || true
rootmntopts=$(egrep '^[^# ]+[ ]+/[ ]' /etc/fstab | awk '{print $4}') || true
case "$rootfstype" in
"btrfs")
rootflags="$rootflags$(expr ",${rootmntopts}," : '.*,\(subvol=[^,]*,\)')"
rootflags="$rootflags$(expr ",${rootmntopts}," : '.*,\(degraded,\)')"
rootflags="${rootflags%,}" # Remove possible trailing ,
;;
esac
get_machine
# Should we override the root device or merely provide a default root
# device?
blsir="$(get_machine_field "$machine" "Bootloader-Sets-Incorrect-Root")"
if [ -z "$blsir" ] ; then
blsir="$(get_machine_field "$machine" "Bootloader-Sets-Root")"
if [ -n "$blsir" ] ; then
echo "WARNING: flash-kernel configuration contains deprecated" >&2
echo "WARNING: \"Bootloader-Sets-Root\" option please update to" >&2
echo "WARNING: use \"Bootloader-Sets-Incorrect-Root\" instead." >&2
fi
fi
if [ ! -e "$rootdev" ]; then
echo "Warning: root device $rootdev does not exist" >&2
if [ "$blsir" = "yes" ]; then
pause_error
fi
fi
if [ "$blsir" = "yes" ]; then
# The boot loader passes a bogus root= (e.g. root=/dev/ram), so
# override the command line parameter.
install -d $DESTDIR/conf
echo "ROOT=\"$rootdev\"" >> $DESTDIR/conf/param.conf
if [ -n "${rootflags}" ]; then
echo "ROOTFLAGS=\"-o ${rootflags}\"" >> $DESTDIR/conf/param.conf
fi
else
# The boot loader may or may not pass root= on the command line, so
# provide a default.
install -d $DESTDIR/conf/conf.d
echo "ROOT=\"$rootdev\"" > $DESTDIR/conf/conf.d/default_root
if [ -n "${rootflags}" ]; then
echo "ROOTFLAGS=\"-o ${rootflags}\"" >> $DESTDIR/conf/conf.d/default_root
fi
fi
# vim:noexpandtab shiftwidth=8
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