source: MondoRescue/trunk/mondo/mondo/restore-scripts/mondo/label-partitions-as-necessary@ 30

#!/bin/sh
#
# 09/05
# - replaced 'grep -w' with 'grep " $.. "'
#
# 06/11
# - added support for 5th column, for labels
#
# 02/02/2003
# - something
#
# mid-2001
# - first written
############################################


#LogIt() {
#    echo "$1" >> /dev/stderr
#}

 
read_partition_line() {
    local tmp label mountpt mountline command format
    if [ "`echo "$1" | grep "LABEL="`" != "" ] ; then
    tmp=`echo "$1" | tr -s ' ' '\t' | cut -f1`
    label=`echo "$tmp" | cut -d'=' -f2`
    format=`echo "$1" | tr -s ' ' '\t' | cut -f3`
    mountline=`mount | grep " $label "`
#   mountpt=`echo "$mountline" | cut -d' ' -f1`
!   mountpt=`cat $mountlist | grep " $label " | cut -d' ' -f1`
        if [ ! "$mountpt" ] ; then
            LogIt "Not labeling anything as $label because $mountpt is not a mountpoint"
        elif [ ! "$label" ] ; then
            LogIt "Not labeling $mountpt as anything because $label is not a label"
        else
            command="e2label $mountpt $label"
            if [ "$format" = "ext2" ] || [ "$format" = "ext3" ] ; then
                LogIt "Running '$command'"
                $command
            else
                LogIt "I am NOT going to run '$command': the partition is format '$format', which doesn't like e2label anyway"
            fi
    fi
    fi
}



# ---------------------------------------------

LogIt "Labeling your drives with e2label"
if [ "$#" -ne "1" ] ; then
    LogIt "label-partitions-as-necessary /tmp/mountlist.txt < /tmp/fstab.new" 1
    exit 1
fi
mountlist=$1
noof_blank_lines=0
read line
while [ "$line" != "" ] && [ "$noof_blank_lines" -le "5" ] ; do
    if [ "$line" = "" ] ; then
    noof_blank_lines=$(($noof_blank_lines+1))
    else
    noof_blank_lines=0
    read_partition_line "$line"
    fi
    read line
done
LogIt "Labeling complete."
exit 0