Synnefo » snf-image

# Copyright 2011 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

#   1. Redistributions of source code must retain the above copyright

#      notice, this list of conditions and the following disclaimer.

#

#  2. Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

# SUCH DAMAGE.

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# The views and conclusions contained in the software and documentation are

# those of the authors and should not be interpreted as representing official

# policies, either expressed or implied, of GRNET S.A.

RESULT=/dev/ttyS1

FLOPPY_DEV=/dev/fd0

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

# Programs

XMLSTARLET=xmlstarlet

RESIZE2FS=resize2fs

CLEANUP=( )

log_error() {

    echo "ERROR: $@" | tee $RESULT >&2

    exit 1

}

get_base_distro() {

    local root_dir=$1

    if [ -e "$root_dir/etc/debian_version" ]; then

        echo "debian"

    elif [ -e "$root_dir/etc/redhat-release" ]; then

        echo "redhat"

    elif [ -e "$root_dir/etc/slackware-version" ]; then

        echo "slackware"

    elif [ -e "$root_dir/SuSE-release" ]; then

        echo "suse"

    elif [ -e "$root_dir/gentoo-release" ]; then

        echo "gentoo"

    fi

}

get_distro() {

    local root_dir=$1

    if [ -e "$root_dir/etc/debian_version" ]; then

        distro="debian"

        if [ -e ${root_dir}/etc/lsb-release ]; then

            ID=$(grep $DISTRIB_ID=${root_dir}/etc/lsb-release | cut -d= -f2)

            if [ "x$ID" = "xUbuntu" ]; then

                distro="ubuntu"

            fi

        fi

        echo "$distro"

    elif [ -e "$root_dir/etc/fedora-release" ]; then

        echo "fedora"

    elif [ -e "$root_dir/etc/centos-release" ]; then

        echo "centos"

    elif [ -e "$root_dir/etc/redhat-release" ]; then

        echo "redhat"

    elif [ -e "$root_dir/etc/slackware-version" ]; then

        echo "slackware"

    elif [ -e "$root_dir/SuSE-release" ]; then

        echo "suse"

    elif [ -e "$root_dir/gentoo-release" ]; then

        echo "gentoo"

    fi

}

cleanup() {

# if something fails here, it souldn't call cleanup again...

    trap - EXIT

    if [ ${#CLEANUP[*]} -gt 0 ]; then

        LAST_ELEMENT=$((${#CLEANUP[*]}-1))

        REVERSE_INDEXES=$(seq ${LAST_ELEMENT} -1 0)

        for i in $REVERSE_INDEXES; do

            # If something fails here, it's better to retry it for a few times

            # before we give up with an error. This is needed for kpartx when

            # dealing with ntfs partitions mounted through fuse. umount is not

            # synchronous and may return while the partition is still busy. A

            # premature attempt to delete partition mappings through kpartx on a

            # device that hosts previously mounted ntfs partition may fail with

            # an  `device-mapper: remove ioctl failed: Device or resource busy'

            # error. A sensible workaround for this is to wait for a while and

            # then try again.

            local cmd=${CLEANUP[$i]}

            $cmd || for interval in 0.25 0.5 1 2 4; do

            echo "Command $cmd failed!"

            echo "I'll wait for $interval secs and will retry..."

            sleep $interval

            $cmd && break

        done

        test $? -eq 1 && { echo "Giving Up..."; exit 1; }

    done

  fi

}

trap cleanup EXIT

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