korn shell maths issue

[nimrodman]

I am having a big problem with a script I am trying to do to check file space usage; I have in my script the following:

if [[ "$usage -gt max_range || $usage -eq "100"" ]]
then
send_eamil
fi

I can see the value in usage and max_range, but the difference does not come out properly, it sends the mail regardless if usage is above or below the criteria given, I have used double quotes as shown in the line of code above, I have used the {} around the variables, but no luck.

In a few words, could anyone help out by explaining the best way to solve this situation, thanks.

 

[PHV]

Perhaps this ?
if [ $usage -gt $max_range -o $usage -eq 100 ]

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[columb]

nimrodman

There's nothing wrong with your syntax, I've tested (amoungt variants)

 if [[ 1 -eq 1 || 2 -eq 4 ]]; then echo yes; fi

on ksh on AIX 5.1

However, I believe this is part of the Korn shell so you might want to add to the start of your script a line like

#!/bin/ksh

which will force the script to use ksh.

To help with debugging try

#!/bin/ksh -xv

which will output the lines as interpreted so you can see what's going on.

On the internet no one knows you're a dog

Columb Healy

 

[SamBones]

Well, if this is actually your code, you have several syntax problems.

if [[ "$usage -gt max_range || $usage -eq "100"" ]]
then
     send_eamil
fi

You've got the whole thing inside the "[[ ]]" quoted. There's no "$" in front of max_range. You are mixing strings and numeric tests.

You can code it like this if you want purely numeric tests.

#!/bin/ksh

typeset -i usage=$1
typeset -i max_range=${2:-500}

print "Usage=$usage, Max Range=$max_range"

if (( usage > max_range || usage == 100 )); then print "Yes"; fi

if (( usage > max_range )); then print "Usage over max range"; fi
if (( usage == 100 )); then print "Usage is 100"; fi

You can try it by passing different values on the command line to test.