Cormac Shannon d0181e685d Implement piping between commands in backtick syntax (issue #06) ...

Add split_pipeline() to split command strings on unquoted | and
exec_pipeline() to fork N children connected by inter-stage pipes.
Only the last stage's stdout/stderr are captured; middle stages'
stderr is inherited. Exit code comes from the last stage.

2026-03-01 22:17:30 +00:00

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