$dir    = '/var/www/metern/data/csv';
    $output = array();
    $output = glob($dir . '/*.csv');
    sort($output);
    $cnt = count($output);
    
    if (file_exists($output[$cnt - 1])) {
        $file       = file($output[$cnt - 1]); // today
        $contalines = count($file);

/dev/sda1       /mnt/nas        ntfs-3g  defaults,auto 0 0

pi@raspberrypi ~ $ sudo reboot

Broadcast message from pi@raspberrypi
 (/dev/pts/0) at 6:34 ...

The system is going down for reboot NOW!
pi@raspberrypi ~ $
login as: pi
pi@192.168.2.102's password:
Linux raspberrypi 3.18.9-v7+ #767 SMP PREEMPT Sat Mar 7 21:52:35 GMT 2015 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Apr 16 06:30:22 2015 from ch-gdiprinzio.home.nets
pi@raspberrypi ~ $ mount
/dev/root on / type ext4 (rw,noatime,data=ordered)
devtmpfs on /dev type devtmpfs (rw,relatime,size=470424k,nr_inodes=117606,mode=755)
none on /dev/pts type devpts (rw,nosuid,noexec,relatime,mode=600,ptmxmode=000)
none on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
none on /sys/kernel/debug type debugfs (rw,relatime)
none on /run type tmpfs (rw,nosuid,noexec,relatime,size=94944k,mode=755)
none on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
none on /run/shm type tmpfs (rw,nosuid,nodev,relatime)
none on /run/user type tmpfs (rw,nosuid,nodev,noexec,relatime,size=102400k,mode=755)
/dev/mmcblk0p1 on /boot type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
/dev/sda1 on /mnt/disk1 type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
/dev/sda2 on /media/MEDIA type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks)
pi@raspberrypi ~ $ cat /etc/fstab
proc            /proc           proc    defaults          0       0
/dev/mmcblk0p1  /boot           vfat    defaults          0       2
/dev/mmcblk0p2  /               ext4    defaults,noatime  0       1
# a swapfile is not a swap partition, so no using swapon|off from here on, use  dphys-swapfile swap[on|off]  for that
/dev/sda1      /mnt/disk1       ntfs-3g defaults,auto     0       0

pi@raspberrypi ~ $ cat /var/log/daemon.log

Apr 16 06:33:54 raspberrypi ntfs-3g[22306]: Version 2012.1.15AR.5 external FUSE 29
Apr 16 06:33:54 raspberrypi ntfs-3g[22306]: Mounted /dev/sda1 (Read-Write, label "INTENSO", NTFS 3.1)
Apr 16 06:33:54 raspberrypi ntfs-3g[22306]: Cmdline options: rw
Apr 16 06:33:54 raspberrypi ntfs-3g[22306]: Mount options: rw,allow_other,nonempty,relatime,fsname=/dev/sda1,blkdev,blksize=4096
Apr 16 06:33:54 raspberrypi ntfs-3g[22306]: Ownership and permissions disabled, configuration type 7

sudo mount /mnt/nas

#!/bin/bash

ADDRESSES="$1"
BAUD_RATE="$2"
DEVICE="$3"

ADDR_ARR=$(echo $ADDRESSES | tr "," "\n")

while [ true ]; do

    ID=0
    POWER=""
    ENERGY=""

    for ADDRESS in $ADDR_ARR
    do
        #((ID++))
        ID=$ADDRESS
        CMD="sdm120c -a ${ADDRESS} -b ${BAUD_RATE} -z 10 -i -p -v -c -f -g -q ${DEVICE}"

        #echo $CMD

        VALUE=`$CMD`

        VOLTAGE=$(echo ${VALUE}   | awk '{print $1}')
        CURRENT=$(echo ${VALUE}   | awk '{print $2}')
        POWER=$(echo ${VALUE}     | awk '{print $3}')
        FACTOR=$(echo ${VALUE}    | awk '{print $4}')
        FREQUENCY=$(echo ${VALUE} | awk '{print $5}')
        ENERGY=$(echo ${VALUE}    | awk '{print $6}')

        if [ "$ENERGY" != "0" -a x"$ENERGY" != x -a "$POWER" != "0" -a x"$POWER" != x ]; then
            echo -e "$ID($POWER*W)\n$ID($ENERGY*Wh)\n${ID}_1($VOLTAGE*V)\n${ID}_2($CURRENT*A)\n${ID}_3($FREQUENCY*Hz)\n${ID}_4($FACTOR*F)" > /run/shm/metern${ADDRESS}.txt
            #echo -e "$VALUE"  > /run/shm/metern${ADDRESS}.tx
        fi
        sleep 5s

    done

done

cat /run/shm/metern1.txt | egrep "^1_4\("| egrep "F\)$"