Question

TEST1=`echo $QUERY_DAYS3 | awk '{print $1}'`
echo $TEST1

TEST2=`echo $QUERY_DAYS3 | awk '{print $2}'`
echo $TEST2

mailx -s "Data Report" -r [e-mail] [e-mail] <<EOF

Error Percentage: $((100 * ($TEST2/ $TEST1)))

EOF

In my bash Shell script I have the above code from which I am sending email. But when I check my email I always see Error Percentage written like as it is written in my above code. It is not evaluating the multiplication and division expression.

I am running the above script like this-

sh -x test1.sh

In the email I get like this-

Error  Percentage: $((100 * (183563 / 3793277)))

I am running SunOS.

May be I need to use Back-Ticks here?

Update:-

My updated script that I am using currently-

TEST1=`echo $QUERY_DAYS3 | awk '{print $1}'`
echo $TEST1

TEST2=`echo $QUERY_DAYS3 | awk '{print $2}'`
echo $TEST2

mailx -s "Data Report" -r [e-mail] [e-mail] <<EOF

Error Percentage: $(( 100 * $TEST2 ) / $TEST1)

EOF

I am running it like this below-

sh -c 'exec ./test.sh'

After trying the suggestion given by lot of peoples. I am getting this error-

./test.sh: command substitution: line 176: syntax error near unexpected token `/'
./test.sh: command substitution: line 176: `( 100 * $TEST2 ) / $TEST1'

What wrong I am doing now? Any thoughts?

Update:-

After making changes, it start working-

Mismatch  Percentage: $((( 100 * $TEST2 ) / $TEST1))

But in the email, the percentage I get was rounded to only one figure like 4 only instead of showing as 4.34563235 How can I get full numbers instead of getting rounded off to one digit.?

Answer 1

You can’t expect it to run under bash, if you explicitely tell sh to execute it…
Try

bash -x test1.sh

Having

#!/bin/bash

as the first line, will only work if you directly execute the script:

./test1.sh

It needs to be ‘executable’ for that to work

chmod +x test1.sh

Update

Error Percentage: $(( 100 * $TEST2 ) / $TEST1)

needs to be

Error Percentage: $((( 100 * $TEST2 ) / $TEST1))