OS Constants:

Signal Constants:
{
  SIGHUP: 1,
  SIGINT: 2,
  SIGQUIT: 3,
  SIGILL: 4,
  SIGTRAP: 5,
  SIGABRT: 6,
  SIGBUS: 7,
  SIGFPE: 8,
  SIGKILL: 9,
  SIGUSR1: 10,
  SIGSEGV: 11,
  SIGUSR2: 12,
  SIGPIPE: 13,
  SIGALRM: 14,
  SIGTERM: 15,
  SIGCHLD: 17,
  SIGCONT: 18,
  SIGSTOP: 19,
  SIGTSTP: 20,
  SIGTTIN: 21,
  SIGTTOU: 22
}

Error Constants:
{
  E2BIG: 7,
  EACCES: 13,
  EADDRINUSE: 48,
  EADDRNOTAVAIL: 49,
  EAFNOSUPPORT: 47,
  EAGAIN: 35,
  EALREADY: 37,
  EBADF: 9,
  EBADMSG: 94,
  EBUSY: 16,
  ECANCELED: 89,
  ECHILD: 10,
  ECONNABORTED: 53,
  ECONNREFUSED: 61,
  ECONNRESET: 54,
  EDEADLK: 11,
  EDESTADDRREQ: 39,
  EDOM: 33,
  EDQUOT: 69,
  EEXIST: 17,
  EFAULT: 14,
  EFBIG: 27,
  EHOSTUNREACH: 65,
  EIDRM: 90,
  EILSEQ: 92,
  EINPROGRESS: 36,
  EINTR: 4,
  EINVAL: 22,
  EIO: 5,
  EISCONN: 56,
  EISDIR: 21,
  ELOOP: 62,
  EMFILE: 24,
  EMLINK: 31,
  EMSGSIZE: 40,
  EMULTIHOP: 95,
  ENAMETOOLONG: 63,
  ENETDOWN: 50,
  ENETRESET: 52,
  ENETUNREACH: 51,
  ENFILE: 23,
  ENOBUFS: 55,
  ENODATA: 96,
  ENODEV: 19,
  ENOENT: 2,
  ENOEXEC: 8,
  ENOLCK: 77,
  ENOLINK: 97,
  ENOMEM: 12,
  ENOMSG: 91,
  ENOPROTOOPT: 42,
  ENOSPC: 28,
  ENOSR: 98,
  ENOSTR: 99,
  ENOSYS: 78,
  ENOTCONN: 57,
  ENOTDIR: 20,
  ENOTEMPTY: 66,
  ENOTSOCK: 38,
  ENOTSUP: 45,
  ENOTTY: 25,
  ENXIO: 6,
  EOPNOTSUPP: 102,
  EOVERFLOW: 84,
  EPERM: 1,
  EPIPE: 32,
  EPROTO: 100,
  EPROTONOSUPPORT: 43,
  EPROTOTYPE: 41,
  ERANGE: 34,
  EROFS: 30,
  ESPIPE: 29,
  ESRCH: 3,
  ESTALE: 70,
  ETIME: 101,
  ETIMEDOUT: 60,
  ETXTBSY: 26,
  EWOULDBLOCK: 35,
  EXDEV: 18
}

Priority Constants:
{
  PRIORITY_LOW: 19,
  PRIORITY_BELOW_NORMAL: 10,
  PRIORITY_NORMAL: 0,
  PRIORITY_ABOVE_NORMAL: -7,
  PRIORITY_HIGH: -14,
  PRIORITY_HIGHEST: -20
}