Stupid issue with number comparison Post: 302324468

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Top Forums Shell Programming and Scripting Stupid issue with number comparison Post 302324468 by DeCoTwc on Wednesday 10th of June 2009 10:58:14 PM

06-10-2009

Registered User

Stupid issue with number comparison

Hello all,

I'm having an infuriating issue with number comparison. Basically I've written a script that runs in cygwin that SSH's to 4 servers, figures out a success percentage and if it is less than a certain point, triggers an alarm. I've managed to get it to connect to the servers, figure out the percentage and create the if statements. Unfortunately what should be the easiest part, comparing the numbers is driving me crazy.

Here is the script (i've added the part about printing the variables to help debug):

Code:

(22:42:27\[DeCo@deco)
[~]$ cat bkcheck.orig 
#!/usr/bin/bash
bkc ()
{
ssh dncsb tail -1 /dvs/dncs/tmp/PerformanceMonitoring/dsmperfmon.csv|awk -F, '{print ($3 / $4) * 100}'
}
qnc ()
{
ssh dncsq tail -1 /dvs/dncs/tmp/PerformanceMonitoring/dsmperfmon.csv|awk -F, '{print ($3 / $4) * 100}'
}
smc ()
{
ssh dncss tail -1 /dvs/dncs/tmp/PerformanceMonitoring/dsmperfmon.csv|awk -F, '{print ($3 / $4) * 100}'
}
nmc ()
{
ssh dncsn tail -1 /dvs/dncs/tmp/PerformanceMonitoring/dsmperfmon.csv|awk -F, '{print ($3 / $4) * 100}'
}
bkerrors=`bkc`
qnerrors=`qnc`
smerrors=`smc`
nmerrors=`nmc`
echo $bkerrors
echo $qnerrors
echo $smerrors
echo $nmerrors
while true;do
if 
[[ "$bkerrors" < "97" ]];then
 cygstart bk.wav
printf "Uh-oh, at `date +%H:%M:%S` Brooklyn VOD is streaming at $bkerrors%%\n"
sleep 5
else 
printf "As of `date +%H:%M:%S`,Brooklyn VOD is streaming at $bkerrors%%\n"
fi
if
[[ "$qnerrors" < "97" ]];then
cygstart qn.wav
printf "Uh-oh, at `date +%H:%M:%S` Queens VOD is streaming at $qnerrors%%\n"
sleep 5
else
printf "As of `date +%H:%M:%S`,Queens VOD is streaming at $qnerrors%%\n"
fi
if
[[ "$smerrors" < "97" ]];then
 cygstart sm.wav
printf "Uh-oh, at `date +%H:%M:%S` S.Manhattan VOD is streaming at $smerrors%%\n"
sleep 5
else
printf "As of `date +%H:%M:%S`,S.Manhattan VOD is streaming at $smerrors%%\n"
fi
if
[[ "$nmerrors" < "97" ]];then
 cygstart nm.wav
printf "Uh-oh, at `date +%H:%M:%S` N.Manhattan VOD is streaming at $nmerrors%%\n"
sleep 5
else
printf "As of `date +%H:%M:%S`,N.Manhattan VOD is streaming at $nmerrors%%\n"
fi

sleep 300
clear
bkerrors=`bkc`
qnerrors=`qnc`
smerrors=`smc`
nmerrors=`nmc`
done

[~]$ ./bkcheck.orig 
99.9454
100
99.8703
99.3868
As of 22:45:23,Brooklyn VOD is streaming at 99.9454%
Uh-oh, at 22:45:24 Queens VOD is streaming at 100%
As of 22:45:30,S.Manhattan VOD is streaming at 99.8703%
As of 22:45:30,N.Manhattan VOD is streaming at 99.3868%

The script runs without throwing an errors, but the logic doesn't work. If the current number is below 97 it does set off the alarm, but it also sets off the alarm if the percentage is 100 or higher. At first I thought it was something to do with the script only understanding integers, but that doesn't seem to be the case. I've tried every combination of single ([) brackets and double ([[) brackets I can think of and still getting the same thing. I've also tried quoting and not quoting the variables, but still the same errors.

I know that this is going to be something stupid...but I'm pulling my proverbial hair out here...

DeCoTwc

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ddi_iomin

ddi_iomin(9F)						   Kernel Functions for Drivers 					     ddi_iomin(9F)

NAME

       ddi_iomin - find minimum alignment and transfer size for DMA

SYNOPSIS

       #include <sys/conf.h>
       #include <sys/ddi.h>
       #include <sys/sunddi.h>

       int ddi_iomin(dev_info_t *dip, int initial, int streaming);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI). This interface is obsolete.

PARAMETERS

       dip	    A pointer to the device's dev_info structure.

       initial	    The  initial minimum DMAtransfer size in bytes. This may be zero or an appropriate dlim_minxfer value for device's ddi_dma_lim
		    structure (see ddi_dma_lim_sparc(9S) or ddi_dma_lim_x86(9S)). This value must be a power of two.

       streaming    This argument, if non-zero, indicates that the returned value should be modified to account for streaming mode  accesses  (see
		    ddi_dma_req(9S) for a discussion of streaming versus non-streaming access mode).

DESCRIPTION

       The  ddi_iomin()  function,  finds  out the minimum DMAtransfer size for the device pointed to by dip. This provides a mechanism by which a
       driver can determine the effects of underlying caches as well as intervening bus adapters on the granularity of a DMA transfer.

RETURN VALUES

       The ddi_iomin() function returns the minimum DMAtransfer size for the calling device, or it returns zero, which means that you  cannot  get
       there from here.

CONTEXT

       This function can be called from user, interrupt, or kernel context.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Obsolete			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ddi_dma_devalign(9F), ddi_dma_setup(9F), ddi_dma_sync(9F), ddi_dma_lim_sparc(9S), ddi_dma_lim_x86(9S), ddi_dma_req(9S)

       Writing Device Drivers

SunOS 5.11							    04 Apr 2006 						     ddi_iomin(9F)