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l0ng-aiandl0ng-ai
0df604054d
* fix(daemon): keep a lingering daemon findable and reapable after quit-and-stop Quit-and-stop could strand a daemon that had already unlinked daemon.sock and deleted daemon.pid but never finished exiting: libc exit() runs atexit handlers and static destructors beside dozens of live threads, and a finalizer that blocks leaves the process holding the singleton lock with no name on disk. Every later launch then spawns a daemon that stands down against the lock and times out red, forever. Three changes, each a fallback for the others: - on_shutdown keeps the pidfile: once the endpoint is unlinked it is the only handle anything has on a process that is not gone yet. A pidfile that outlives a clean exit was already handled by recorded_daemon_is_dead and the reap path. - The daemon exits through _exit(2) (after flushing the logger), skipping the atexit/destructor window entirely; everything owed to disk is flushed explicitly in on_shutdown. - spawn::stop reaps with the pid it captured before asking the daemon to die, instead of re-reading a pidfile an old build's shutdown may have wiped mid-stop; reap_recorded_daemon keeps the pidfile when the process survives even SIGKILL, so the next attempt still has someone to reap. * review: fix stale stop() comment, pin the mid-stop pidfile-vanish ordering in the test The comment at the top of stop() still claimed a clean shutdown removes the pidfile, which this branch just made untrue; it now states the real reasons the pid is captured early. The vanishing-pidfile test now asserts the sweeper's delete actually landed while stop() was waiting, so a future shrink of PROCESS_EXIT_TIMEOUT cannot silently turn it into a weaker scenario. --------- Co-authored-by: l0ng-ai <24760907+l0ng-ai@users.noreply.github.com>