UNIX for Dummies Questions & Answers

#!/bin/sh
#
# script to see if the given value is correct
#
# Define errors
ER_AF=86 # Var is higher than five
ER_BO=87 # Var is below one
# Constants
a=5
b=1
# Execute sio and
# give var the output value of sio
var="$(/disk/sio -p3 -b57600 -R)"
echo $var
echo
# Test if var is above 5
if (( "$var" > "$a" ));
 then 
 echo "test failed" # Var is higher than 5
 exit $ER_AF
else
# Test if var is below 1
 if (( "$var" < "$b" ));
  then
  echo "test failed" # var is below 1
  exit $ER_BO
 else
  echo "test succes" # var is between 1 & 5
 fi
fi

var="$(/disk/sio -p3 -b57600 -R)"
echo "$var" | sed -n l

# Test if var is above 5
if (( "$var" > "$a" ));
 then 
 echo "test failed" # Var is higher than 5
 exit $ER_AF

# Test if var is above 5
if [[ "$var" > "$a" ]]
 then 
 echo "test failed" # Var is higher than 5
 exit $ER_AF