I'm trying to capture the output of an scp command to a variable or array in Bash. I'm not exactly sure where the text comes from local or remote ?

So far I've tried the following :

#!/bin/bash -x 

mytty=$(tty)
echo "mytty is ${mytty}"
myvar=$(scp  test.js  [email protected]:/home/crashdog 2>&1 > $mytty)
echo "myvar is ${myvar}"

I can see the text on my tty like follows:

test.js                                                                                                 100% 1200     1.2KB/s   00:00 

But myvar remains empty. So my two questions, where is above text coming from ? and how can I assign the text to a variable or array in Bash.

Thanks

CodePudding user response：

Your problem is that scp doesn't output anything when its stdout isn't the terminal.

To trick it you can use script:

out=$(script -qefc "scp test.js [email protected]:/home/crashdog" /dev/null)

echo "$out"

You can find more info about it in How to trick an application into thinking its stdout is a terminal, not a pipe