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session-child: use _exit in SIGTERM handler (#484) - #490
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exit() is not async-signal-safe and can deadlock in malloc when SIGTERM arrives while the arena lock is held, delaying greeter teardown. Closes: ubuntu#484
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does this work on BSD? |
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Summary
signal_cbcalledexit()from a SIGTERM handler, which is not async-signal-safe and can deadlock in malloc when the arena lock is held (intermittent ~90s greeter stop hang)._exit()instead so atexit/ELF destructors are skipped, matching the existing “just quit” intent.Closes: #484