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4. Signals

On startup, all signals will be reset to their default. Then a signal handler will be installed for all signals that (i) can be trapped by a process and (ii) whose default action would be to stop, abort, or terminate the process, to allow for graceful termination.

For SIGSEGV, SIGILL, SIGBUS, and SIGFPE, a 'fast' termination will occur, with only minimal cleanup that may result in a stale pid file being left.

If the operating system supports the siginfo_t parameter for the signal handling routine (see man sigaction ), the origin of the signal will be checked.

The following signals can be sent to the process to control it:

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