How to return spawned process exit code in Expect script?

Question

I use expect for running test scripts. Tests return success/failure through exit code. But expect return equivalent exit code. How to make expect return proper exit status?<

Answer 1

You're already waiting for the eof at the end of your loop, you just need to use wait and catch the result:

spawn true
expect eof
catch wait result
exit [lindex $result 3]

Exits with 0.

spawn false
expect eof
catch wait result
exit [lindex $result 3]

Exits with 1.