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Full Discussion: Counter function problems...
Top Forums Shell Programming and Scripting Counter function problems... Post 302170806 by LinuxRacr on Tuesday 26th of February 2008 06:36:25 PM
Old 02-26-2008
Counter function problems...
Ok, here is the issue I have..

I wrote a script that builds disk groups using vxvm, and it works really good. I added a feature that would tell you the max size you could build your your lvol to. I do this by getting the size of the disks I am using in KB, I subtract 5104 from it, and then I multiply it by the number of disks I am using to build my disk group. I set this to a variable called $NUMBER for use throughout the script. The function is finished, it outputs the answer to a file called value.txt. For some reason it works great until $NUMBER = 5 or more.

Below is the section of the script that is giving me issues:
Code:
function adder_func
         {
         TYPE=$1
         if [ -s sizes.$TYPE ]; then
            let sum=0
            for i in `cat sizes.$TYPE`
            do
             ((i=$i - 5104))
             ((new_sum=$i + $sum))
             sum=$new_sum
            done
            ((last_sum=$new_sum*$NUMBER))
            echo ${last_sum}
           else
            break
          fi
         }

## Call the adder_func function and output to value.txt to get the max size for your lvol.
adder_func size > value.txt

When the function is with an option called 'size' it reads from a file called sizes.size (sizes.$TYPE). As you see, the size option is the same as the $TYPE variable.

Output from sizes.size (which is the size of the disks in KB):
524288000

Here is the output from value.txt when the $NUMBER variable = 5:
-1149269920

When I do the math, of course it shouldn't be a large negative number:

root@server:/root_home> bc -l
524288000-5104
524282896
524282896*5
2621414480

So it should be 2621414480 or 2499.97GB, or about 2.5TB.

Am I surpassing the numerical limits of the function?
 

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LEARN ABOUT DEBIAN

ost_counter

ost::Counter< T >(3)					     Library Functions Manual					      ost::Counter< T >(3)

NAME

       ost::Counter< T > -

       The counter template is used for generic objects which act as automatic counters.

SYNOPSIS

       #include <counter.h>

   Public Member Functions
       Counter ()
	   Construct and initialize a counter to zero.
       Counter (const Counter &counter)
	   Construct a counter with an initial value set for another counter.
       Counter (T initial)
	   Construct a counter with an initial value of the specified data type.
       T & operator= (T c)
       operator T ()

   Protected Attributes
       T count

Detailed Description
   template<typename T>class ost::Counter< T >
       The counter template is used for generic objects which act as automatic counters.

       Each time the object is accessed, the underlying counted data type is incremented.

       Author:
	   David Sugar dyfet@gnutelephony.org Automatic counter template class.

Constructor &; Destructor Documentation
   template<typename T > ost::Counter< T >::Counter () [inline]
       Construct and initialize a counter to zero.

       References ost::Counter< T >::count.

   template<typename T > ost::Counter< T >::Counter (const Counter< T > &counter) [inline]
       Construct a counter with an initial value set for another counter. Parameters:
	   counter to copy from.

       References ost::Counter< T >::count.

   template<typename T > ost::Counter< T >::Counter (Tinitial) [inline]
       Construct a counter with an initial value of the specified data type. Parameters:
	   initial value to set.

       References ost::Counter< T >::count.

Member Function Documentation
   template<typename T > ost::Counter< T >::operator T () [inline]
       References ost::Counter< T >::count.

   template<typename T > T& ost::Counter< T >::operator= (Tc) [inline]
Member Data Documentation
   template<typename T > T ost::Counter< T >::count [protected]
       Referenced by ost::Counter< T >::Counter(), and ost::Counter< T >::operator T().

Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012					      ost::Counter< T >(3)
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