Bash script to get variable from second bash script [duplicate]

Question

Possible Duplicate:
bash store output as a variable

I have a script that outputs a simple integer like "10", then i have a second script where i want to call this script and grab the integer as a variable.

#!/bin/bash

KBPS= ## NEED OUTPUT FROM /USR/LOCAL/BIN/ETH0TX.SH
THRESHOLD=50 #KBPS
if [ $KBPS -gt $THRESHOLD ]; then
   exit 1
fi

Is that possible?

i tried various combinations some very similar to the solution. do i need to list everything that didn't work? — Vince Lowe
– Vince Lowe, Commented Jan 4, 2013 at 12:49
Yes, mostly if already purposed answer did'nt make your job! — F. Hauri - Give Up GitHub
– F. Hauri - Give Up GitHub, Commented Jan 4, 2013 at 12:50
i think its perfectly acceptable to ask a simple question, get a simple answer without posting inaccurate code. But in a lot of cases i agree you should show your work. — Vince Lowe
– Vince Lowe, Commented Jan 4, 2013 at 13:05

Guru · Accepted Answer · 2013-01-04 12:19:33Z

0

Like this:

KBPS=$(/usr/local/bin/eth0tx.sh)

answered Jan 4, 2013 at 12:19

Guru

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1 Comment

Vince Lowe Over a year ago

thanks everyone! first answer wins

Brian Agnew · Accepted Answer · 2013-01-04 12:19:49Z

0

KBPS=$(/usr/local/bin/eth0tx.sh)

will set KBPS to the output of your script. Capitalisation removed. You can check the exit code with $?. That may be worth doing rather than simply populate KBPS with invalid/blank data.

More info here, and note the comments re. whitespace/newlines etc.

answered Jan 4, 2013 at 12:19

Brian Agnew

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Comments

fge · Accepted Answer · 2013-01-04 12:19:50Z

0

Yes it is:

KBPS=$(theotherbashscript)

This is called command substitution.

Note: requires that the output does not contain spaces.

answered Jan 4, 2013 at 12:19

fge

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1 Comment

Barton Chittenden Over a year ago

If you're worried about spaces, you can quote the string that you're capturing via command substitution: KBPS="$(theotherbashscript)".

Adam Sznajder · Accepted Answer · 2013-01-04 12:19:55Z

0

KBPS=$(/usr/local/bin/eth0tx.sh)

What a race! :D

answered Jan 4, 2013 at 12:19

Adam Sznajder

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