Synnefo » snf-image

#! /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

    ufstype="$(get_ufstype "$rootdev")"

    if [ "x$ufstype" = "x" ]; then

        exit 1

    fi

    $MOUNT -t ufs -o ufstype="$ufstype,rw" "$rootdev" "$SNF_IMAGE_TARGET"

    # In many cases when you try to mount a UFS file system read-write,

    # the mount command returns SUCCESS and a message like this gets printed:

    #

    #   mount: warning: /mnt seems to be mounted read-only.

    #

    # remounting does the trick

    $MOUNT -o remount,rw "$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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