#! /bin/bash

# Copyright (C) 2011 GRNET S.A. 
#
# 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 Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

### BEGIN TASK INFO
# Provides:		MountImage
# RunBefore:		UmountImage
# Short-Description:	Mount the partition that hosts the image
### END TASK INFO

set -e
. "@commondir@/common.sh"

trap task_cleanup EXIT
report_task_start

if [ ! -d "$SNF_IMAGE_TARGET" ]; then
    log_error "Target dir:\`$SNF_IMAGE_TARGET' is missing"
fi

if [ -z "$SNF_IMAGE_PROPERTY_ROOT_PARTITION" ]; then
    log_error "Required image property \`ROOT_PARTITION' not defined or empty"
fi

rootdev="${SNF_IMAGE_DEV}${SNF_IMAGE_PROPERTY_ROOT_PARTITION}"

if [ ! -b "$rootdev" ]; then
    log_error "Root partition device:\`$rootdev' is not a block device. " \
        "Please check if the value for image property \`ROOT_PARTITION' " \
        "(=$SNF_IMAGE_PROPERTY_ROOT_PARTITION) is valid."
fi

if [[ "$SNF_IMAGE_PROPERTY_OSFAMILY" == *bsd ]]; then
    if ! $DUMPFS_UFS "$rootdev" &> /dev/null; then
        os=${SNF_IMAGE_PROPERTY_OSFAMILY^[bsd]}
        log_error "For ${os^?} images only UFS root partitions are supported."
    fi
    usftype="$(get_ufstype "$rootdev")"
    if [ "x$ufstype" = "x" ]; then
        exit 1
    fi
    $MOUNT -t ufs -o ufstype="$ufstype,rw" "$rootdev" "$SNF_IMAGE_TARGET"
else
    $MOUNT -o rw "$rootdev" "$SNF_IMAGE_TARGET"
fi

if [ "$SNF_IMAGE_PROPERTY_OSFAMILY" != "linux" ]; then
    exit 0
fi

if [ ! -f "${SNF_IMAGE_TARGET}/etc/fstab" ]; then
    log_error "/etc/fstab is missing from the root file system"
fi

# Read the local partitions from fstab and get a sorted list:
#<mount_point> <device> <options>
fstab="$(grep -v ^\# "${SNF_IMAGE_TARGET}/etc/fstab" | awk '{ if (match($3, "ext[234]")) { print $2,$1,$4 } }' | sort -bd)"

# Mount non-root filesystems
while read line; do
    read -ra entry <<< "$line"
    # Skip root. It is already mounted
    if [ "${entry[0]}" = "/" ]; then
        continue
    fi

    if [[ ${entry[1]} =~ ^(LABEL|UUID)= ]]; then
        entry[1]=$(findfs "${entry[1]}")
    fi

    # I'm in doupt. Sould I mount the filesystems with the mount options
    # found in the image's /etc/fstab or not?
    $MOUNT "${entry[1]}" "${SNF_IMAGE_TARGET}${entry[0]}" # -o "${entry[2]}"

done <<< "$fstab"

exit 0

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