#!/bin/bash

PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin

# Return the greatest snapshot allocation
snapshot_max_alloc(){
    MAX_PERCENT=0
    for PERCENT in $(lvdisplay | grep % | sed -e 's/  Allocated to snapshot  //g' -e 's/%//g'); do
        if [[ "$PERCENT" > "$MAX_PERCENT" ]]; then
            MAX_PERCENT=$PERCENT
        fi
    done
    echo "$MAX_PERCENT"
}

# Number of active snapshots
snapshots(){
    echo $(lvdisplay | grep % | wc -l)
}

# Number of logical volumes
lv(){
    echo $(lvdisplay  | grep 'LV Name' | wc -l)
}

# Number of volume group
vg(){
    echo $(vgdisplay  | grep 'VG Name' | wc -l)
}

case $1 in 
    snapshot_max_alloc|snapshots|lv|vg)
        $1
    ;;
    *)
        echo 'ZBX_NOTSUPPORTED'
esac