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93805484c5
Also, fix commentary to talk about “nonexistent” rather than “dead” processes, since the code looks for the former not the latter and the difference matters for zombies. * src/tail.c (some_writers_exist): Rename from writers_are_dead, negate the sense, don’t have a special and counterintuitive case for !nbpids, remove PIDs found not to exist, and avoid some though not all unlikely races when kernels reuse PIDs. (tail_forever): Optimize via blocking I/O even if --pid was used, so long as all the writers no longer exist. (tail_forever, tail_forever_inotify): Simplify the writers_dead logic; there is no need to have a local var to track this, since we can use pids and nbpids now. (parse_options): Also free and clear pids if !forever.