This is just copy-pasta.

constants.js

module.exports = {
  O_RDONLY: 0,
  O_WRONLY: 1,
  O_RDWR: 2,
  S_IFMT: 61440,
  S_IFREG: 32768,
  S_IFDIR: 16384,
  S_IFCHR: 8192,
  S_IFBLK: 24576,
  S_IFIFO: 4096,
  S_IFLNK: 40960,
  S_IFSOCK: 49152,
  O_CREAT: 512,
  O_EXCL: 2048,
  O_NOCTTY: 131072,
  O_TRUNC: 1024,
  O_APPEND: 8,
  O_DIRECTORY: 1048576,
  O_NOFOLLOW: 256,
  O_SYNC: 128,
  O_SYMLINK: 2097152,
  S_IRWXU: 448,
  S_IRUSR: 256,
  S_IWUSR: 128,
  S_IXUSR: 64,
  S_IRWXG: 56,
  S_IRGRP: 32,
  S_IWGRP: 16,
  S_IXGRP: 8,
  S_IRWXO: 7,
  S_IROTH: 4,
  S_IWOTH: 2,
  S_IXOTH: 1,
  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,
  SIGHUP: 1,
  SIGINT: 2,
  SIGQUIT: 3,
  SIGILL: 4,
  SIGTRAP: 5,
  SIGABRT: 6,
  SIGIOT: 6,
  SIGBUS: 10,
  SIGFPE: 8,
  SIGKILL: 9,
  SIGUSR1: 30,
  SIGSEGV: 11,
  SIGUSR2: 31,
  SIGPIPE: 13,
  SIGALRM: 14,
  SIGTERM: 15,
  SIGCHLD: 20,
  SIGCONT: 19,
  SIGSTOP: 17,
  SIGTSTP: 18,
  SIGTTIN: 21,
  SIGTTOU: 22,
  SIGURG: 16,
  SIGXCPU: 24,
  SIGXFSZ: 25,
  SIGVTALRM: 26,
  SIGPROF: 27,
  SIGWINCH: 28,
  SIGIO: 23,
  SIGSYS: 12,
  SSL_OP_ALL: -2147479553,
  SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION: 262144,
  SSL_OP_CIPHER_SERVER_PREFERENCE: 4194304,
  SSL_OP_CISCO_ANYCONNECT: 32768,
  SSL_OP_COOKIE_EXCHANGE: 8192,
  SSL_OP_CRYPTOPRO_TLSEXT_BUG: -2147483648,
  SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS: 2048,
  SSL_OP_EPHEMERAL_RSA: 2097152,
  SSL_OP_LEGACY_SERVER_CONNECT: 4,
  SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER: 32,
  SSL_OP_MICROSOFT_SESS_ID_BUG: 1,
  SSL_OP_MSIE_SSLV2_RSA_PADDING: 64,
  SSL_OP_NETSCAPE_CA_DN_BUG: 536870912,
  SSL_OP_NETSCAPE_CHALLENGE_BUG: 2,
  SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG: 1073741824,
  SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG: 8,
  SSL_OP_NO_COMPRESSION: 131072,
  SSL_OP_NO_QUERY_MTU: 4096,
  SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION: 65536,
  SSL_OP_NO_SSLv2: 16777216,
  SSL_OP_NO_SSLv3: 33554432,
  SSL_OP_NO_TICKET: 16384,
  SSL_OP_NO_TLSv1: 67108864,
  SSL_OP_PKCS1_CHECK_1: 134217728,
  SSL_OP_PKCS1_CHECK_2: 268435456,
  SSL_OP_SINGLE_DH_USE: 1048576,
  SSL_OP_SINGLE_ECDH_USE: 524288,
  SSL_OP_SSLEAY_080_CLIENT_DH_BUG: 128,
  SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG: 16,
  SSL_OP_TLS_BLOCK_PADDING_BUG: 512,
  SSL_OP_TLS_D5_BUG: 256,
  SSL_OP_TLS_ROLLBACK_BUG: 8388608,
  NPN_ENABLED: 1
}