Pipe output and capture exit status in Bash
bash, error-handling, pipe, shell
Solution
There is an internal Bash variable called `$PIPESTATUS`; it’s an array that holds the exit status of each command in your last foreground pipeline of commands.
<command> | tee out.txt ; test ${PIPESTATUS[0]} -eq 0
Or another alternative which also works with other shells (like zsh) would be to enable pipefail:
set -o pipefail
...
The first option does not work with `zsh` due to a little bit different syntax.
Problem
I want to execute a long running command in Bash, and both capture its exit status, and tee its output. So I do this: ``` command | tee out.txt ST=$? ``` The problem is that the variable ST captures the exit status of `tee` and not of command. How can I solve this? Note that command is long running and redirecting the output to a file to view it later is not a good solution for me.