Tool to get traffic statistic from Internet provider Vesso-Bel (BY) using wget [v.0.1]

vessobel.sh

#!/bin/bash

HLPARG=--help
# VRBARG=--verbose
TMPDIR=/tmp/vessobel
ERR='" либо eMail="" не найден'
HTM=vessobel.html
# VRB=1
HLPMSG="Tool to get traffic statistic from Internet provider Vesso-Bel (Belarus).\n\n\
Usage: vessobel.sh [LOGIN]\n\nOutput: [Used in MB] / [Free in MB] | [Total in GB]\n\n\
Options:\n\t--help\t\tprint this help.\n\n\
Mail bug reports and suggestions to <dap.darkness at gmail dot com>."

if [ "`echo $@ | grep -o -- $HLPARG`" == $HLPARG ]

then
  echo -e $HLPMSG
else

#   if [ "`echo $@ | grep -o -- $VRBARG`" == '' ]
#   then
#     VRB=0
#     stty -echo
#   fi

  mkdir -p $TMPDIR
  cd $TMPDIR

  wget -q 'http://stat.vessobel.by/cgi-bin/BILinfon.cgi?Login='$1
  iconv -f cp1251 -t utf-8 BILinfon.cgi\?Login=$1 > $HTM
  
  if [ "`grep -o "$ERR" $HTM`" == "$ERR" ]
  
  then
    OUT='Wrong login!'
  else
  
    TTLGB=`grep ГБ $HTM | awk '{ print $1 }'`
    let 'TTLMB=TTLGB*1024'
    USED=`grep мб $HTM | awk '{ print $6 }' | grep -o '[0-9]*'`
    let 'FREE=TTLMB-USED'
  
    OUT=$USED' / '$FREE' | '$TTLGB'GB'
  fi
  
#   if [ "$VRB" == "0" ]
#   then
#     stty echo
#   fi

  echo $OUT
  cd ..
  rm -rf $TMPDIR
fi