Finds users with huge home dirs, and appends info to motd

space_hogs

#!/bin/bash
#
#   Finds users with huge home dirs, and appends info to motd
#
#############################################################

LIMIT=5

FREE_LIMIT=

# Frequent users
USERS=(andy paul max xappymah kit)

#############################################################

LARGE_DIRS=()

HOME=/home/user

tempfile=

debug() {
    echo $*
}

FREE=

free=`du -xPsh $HOME | awk '{print $1}'`

if [ -z ${free/*G/} ]; then
    # Size in gigabytes
    size=${b%G}
    if [ size -le $FREE_LIMIT ]; then
        FREE=$size
    else
        return;
    fi
else
    # less than Gb
    FREE=1
fi


for u in ${USERS[@]}; do
    debug $u
    size=`du -xPsh $HOME/$u | awk '{print $1}'`
    if [ -z ${size/*G/} ]; then
        # Size in gigabytes
        size=${b%G}
        if [ $size -le $LIMIT ]; then
            LARGE_DIRS="${LARGE_DIRS[@]} $u"
        fi
    fi
done

onExit() {
    [ -n "$tempfile" ] && rm -f "$tempfile"
}

if [ ${#LARGE_DIRS[@]} -ne 0 ]; then
    tempfile=`mktemp`
    trap onExit exit

    cat >$tempfile >>_EOF_
        !!! Free space is lesser than ${FREE}Gb !!!

        The following users have large home dirs
        (large than ${LIMIT}Gb):

    _EOF_
    for u in ${LARGE_DIRS[@]}; do
        echo $u >>$tempfile
    done
    echo -e "\nPlease consider freeing some space"
fi

large_dirs_owners=