Chet Ramey <chet.ramey@case.edu> writes:
Yes. As described in later messages, there is a special case that allows
the output of `jobs' to be piped. This came in at some point between
bash-1.05 (March 1990) and bash-1.08 (May 1991). I never extended this
special case to `builtin' or `command'.
Is this (are these) special cases documented? I just looked through my
(admittedly obsolete) bash man page and couldn't find any mention of
special behavior of the "jobs" builtin. But presumably careful reading
of the documentation of "command", "builtin", and "jobs" would show
which cases work in which way.