Re: PIPESTATUS differs from $? for compound command

[Ulrich Müller]

>>>>> On Mon, 09 Dec 2024, Mike Jonkmans wrote:

>> Why is `if false; then :; fi' not a pipeline?  It is a command, and the
>> components of a pipeline are commands.

> It is a pipeline indeed, but not the last (doc says: most-recently-executed).
> The last is the 'false' simple command/pipeline.

Then what about these?

$ true; case a in esac
$ echo "ret = $?, status = ${PIPESTATUS[*]}"
ret = 0, status = 0

$ false; case a in esac
$ echo "ret = $?, status = ${PIPESTATUS[*]}"
ret = 0, status = 1

"case a in esac" is a one-command pipeline, and certainly it is executed
after "false". So it should qualify as "the most-recently-executed
foreground pipeline (which may contain only a single command)".