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+// 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.
+//
+// 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.
+module.exports = [
+ 'SIGABRT',
+ 'SIGALRM',
+ 'SIGHUP',
+ 'SIGINT',
+ 'SIGTERM'
+]
+
+if (process.platform !== 'win32') {
+ module.exports.push(
+ 'SIGVTALRM',
+ 'SIGXCPU',
+ 'SIGXFSZ',
+ 'SIGUSR2',
+ 'SIGTRAP',
+ 'SIGSYS',
+ 'SIGQUIT',
+ 'SIGIOT'
+ // should detect profiler and enable/disable accordingly.
+ // see #21
+ // 'SIGPROF'
+ )
+}
+
+if (process.platform === 'linux') {
+ module.exports.push(
+ 'SIGIO',
+ 'SIGPOLL',
+ 'SIGPWR',
+ 'SIGSTKFLT',
+ 'SIGUNUSED'
+ )
+}