/// <reference types="node" />
/**
 * This is not the set of all possible signals.
 *
 * It IS, however, the set of all signals that trigger
 * an exit on either Linux or BSD systems.  Linux is a
 * superset of the signal names supported on BSD, and
 * the unknown signals just fail to register, so we can
 * catch that easily enough.
 *
 * Windows signals are a different set, since there are
 * signals that terminate Windows processes, but don't
 * terminate (or don't even exist) on Posix systems.
 *
 * Don't bother with SIGKILL.  It's uncatchable, which
 * means that we can't fire any callbacks anyway.
 *
 * If a user does happen to register a handler on a non-
 * fatal signal like SIGWINCH or something, and then
 * exit, it'll end up firing `process.emit('exit')`, so
 * the handler will be fired anyway.
 *
 * SIGBUS, SIGFPE, SIGSEGV and SIGILL, when not raised
 * artificially, inherently leave the process in a
 * state from which it is not safe to try and enter JS
 * listeners.
 */
export declare const signals: NodeJS.Signals[];
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