切换用户并将命令输出存储在变量中

Question

I'm trying to get command output into a variable when switching user in my script:

checkOutput="$(echo command1 | su - user1)"

But using echo on the variable does not return the desired result:

echo $checkOutput

Output:

Oracle Corporation SunOS ... January 2005 logout

Desired output (to be stored in variable):

Java version ...
Apache Qpid is RUNNING with PID=5227

When running command echo command1 | su - user1 echo command1 | su - user1 in terminal the output is:

Oracle Corporation SunOS ... January 2005
Java version ...

Apache QPID is RUNNING with PID=5227

logout

I know that when su - user1 is called the script exits its current scope. Is there a way to store the output of the command? Or is this impossible using bash.

Thanks

Answer 1

Use script command to log output in a file. So it would look something like this:

script -c '$(echo command1 | su - user1)' -f file.txt

You can then reference this file to get desired output from it.