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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 PLAN9

dh_installdebconf

DH_INSTALLDEBCONF(1)						     Debhelper						      DH_INSTALLDEBCONF(1)

NAME

       dh_installdebconf - install files used by debconf in package build directories

SYNOPSIS

       dh_installdebconf [debhelperoptions] [-n] [--params]

DESCRIPTION

       dh_installdebconf is a debhelper program that is responsible for installing files used by debconf into package build directories.

       It also automatically generates the postrm commands needed to interface with debconf. The commands are added to the maintainer scripts by
       dh_installdeb. See dh_installdeb(1) for an explanation of how that works.

       Note that if you use debconf, your package probably needs to depend on it (it will be added to ${misc:Depends} by this program).

       Note that for your config script to be called by dpkg, your postinst needs to source debconf's confmodule. dh_installdebconf does not
       install this statement into the postinst automatically as it is too hard to do it right.

FILES

       debian/package.config
	   This is the debconf config script, and is installed into the DEBIAN directory in the package build directory.

	   Inside the script, the token #DEBHELPER# is replaced with shell script snippets generated by other debhelper commands.

       debian/package.templates
	   This is the debconf templates file, and is installed into the DEBIAN directory in the package build directory.

       debian/po/
	   If this directory is present, this program will automatically use po2debconf(1) to generate merged templates files that include the
	   translations from there.

	   For this to work, your package should build-depend on po-debconf.

OPTIONS

       -n, --no-scripts
	   Do not modify postrm script.

       -- params
	   Pass the params to po2debconf.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

11.1.6ubuntu2							    2018-05-10						      DH_INSTALLDEBCONF(1)
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