signal-exit/signals.js

// 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.

module.exports = [
  'SIGABRT',
  'SIGALRM',
  'SIGBUS',
  'SIGFPE',
  'SIGHUP',
  'SIGILL',
  'SIGINT',
  'SIGIOT',
  'SIGPIPE',
  'SIGPROF',
  'SIGQUIT',
  'SIGSEGV',
  'SIGSYS',
  'SIGTERM',
  'SIGTRAP',
  'SIGUSR2',
  'SIGVTALRM',
  'SIGXCPU',
  'SIGXFSZ'
]

if (process.platform === 'linux') {
  module.exports.push(
    'SIGIO',
    'SIGPOLL',
    'SIGPWR',
    'SIGSTKFLT',
    'SIGUNUSED'
  )
}