// equivalent to browserify constants module, converted to an ES module
export const O_RDONLY = 0;
export const O_WRONLY = 1;
export const O_RDWR = 2;
export const S_IFMT = 61440;
export const S_IFREG = 32768;
export const S_IFDIR = 16384;
export const S_IFCHR = 8192;
export const S_IFBLK = 24576;
export const S_IFIFO = 4096;
export const S_IFLNK = 40960;
export const S_IFSOCK = 49152;
export const O_CREAT = 512;
export const O_EXCL = 2048;
export const O_NOCTTY = 131072;
export const O_TRUNC = 1024;
export const O_APPEND = 8;
export const O_DIRECTORY = 1048576;
export const O_NOFOLLOW = 256;
export const O_SYNC = 128;
export const O_SYMLINK = 2097152;
export const O_NONBLOCK = 4;
export const S_IRWXU = 448;
export const S_IRUSR = 256;
export const S_IWUSR = 128;
export const S_IXUSR = 64;
export const S_IRWXG = 56;
export const S_IRGRP = 32;
export const S_IWGRP = 16;
export const S_IXGRP = 8;
export const S_IRWXO = 7;
export const S_IROTH = 4;
export const S_IWOTH = 2;
export const S_IXOTH = 1;
export const E2BIG = 7;
export const EACCES = 13;
export const EADDRINUSE = 48;
export const EADDRNOTAVAIL = 49;
export const EAFNOSUPPORT = 47;
export const EAGAIN = 35;
export const EALREADY = 37;
export const EBADF = 9;
export const EBADMSG = 94;
export const EBUSY = 16;
export const ECANCELED = 89;
export const ECHILD = 10;
export const ECONNABORTED = 53;
export const ECONNREFUSED = 61;
export const ECONNRESET = 54;
export const EDEADLK = 11;
export const EDESTADDRREQ = 39;
export const EDOM = 33;
export const EDQUOT = 69;
export const EEXIST = 17;
export const EFAULT = 14;
export const EFBIG = 27;
export const EHOSTUNREACH = 65;
export const EIDRM = 90;
export const EILSEQ = 92;
export const EINPROGRESS = 36;
export const EINTR = 4;
export const EINVAL = 22;
export const EIO = 5;
export const EISCONN = 56;
export const EISDIR = 21;
export const ELOOP = 62;
export const EMFILE = 24;
export const EMLINK = 31;
export const EMSGSIZE = 40;
export const EMULTIHOP = 95;
export const ENAMETOOLONG = 63;
export const ENETDOWN = 50;
export const ENETRESET = 52;
export const ENETUNREACH = 51;
export const ENFILE = 23;
export const ENOBUFS = 55;
export const ENODATA = 96;
export const ENODEV = 19;
export const ENOENT = 2;
export const ENOEXEC = 8;
export const ENOLCK = 77;
export const ENOLINK = 97;
export const ENOMEM = 12;
export const ENOMSG = 91;
export const ENOPROTOOPT = 42;
export const ENOSPC = 28;
export const ENOSR = 98;
export const ENOSTR = 99;
export const ENOSYS = 78;
export const ENOTCONN = 57;
export const ENOTDIR = 20;
export const ENOTEMPTY = 66;
export const ENOTSOCK = 38;
export const ENOTSUP = 45;
export const ENOTTY = 25;
export const ENXIO = 6;
export const EOPNOTSUPP = 102;
export const EOVERFLOW = 84;
export const EPERM = 1;
export const EPIPE = 32;
export const EPROTO = 100;
export const EPROTONOSUPPORT = 43;
export const EPROTOTYPE = 41;
export const ERANGE = 34;
export const EROFS = 30;
export const ESPIPE = 29;
export const ESRCH = 3;
export const ESTALE = 70;
export const ETIME = 101;
export const ETIMEDOUT = 60;
export const ETXTBSY = 26;
export const EWOULDBLOCK = 35;
export const EXDEV = 18;
export const SIGHUP = 1;
export const SIGINT = 2;
export const SIGQUIT = 3;
export const SIGILL = 4;
export const SIGTRAP = 5;
export const SIGABRT = 6;
export const SIGIOT = 6;
export const SIGBUS = 10;
export const SIGFPE = 8;
export const SIGKILL = 9;
export const SIGUSR1 = 30;
export const SIGSEGV = 11;
export const SIGUSR2 = 31;
export const SIGPIPE = 13;
export const SIGALRM = 14;
export const SIGTERM = 15;
export const SIGCHLD = 20;
export const SIGCONT = 19;
export const SIGSTOP = 17;
export const SIGTSTP = 18;
export const SIGTTIN = 21;
export const SIGTTOU = 22;
export const SIGURG = 16;
export const SIGXCPU = 24;
export const SIGXFSZ = 25;
export const SIGVTALRM = 26;
export const SIGPROF = 27;
export const SIGWINCH = 28;
export const SIGIO = 23;
export const SIGSYS = 12;
export const SSL_OP_ALL = 2147486719;
export const SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION = 262144;
export const SSL_OP_CIPHER_SERVER_PREFERENCE = 4194304;
export const SSL_OP_CISCO_ANYCONNECT = 32768;
export const SSL_OP_COOKIE_EXCHANGE = 8192;
export const SSL_OP_CRYPTOPRO_TLSEXT_BUG = 2147483648;
export const SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS = 2048;
export const SSL_OP_EPHEMERAL_RSA = 0;
export const SSL_OP_LEGACY_SERVER_CONNECT = 4;
export const SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER = 32;
export const SSL_OP_MICROSOFT_SESS_ID_BUG = 1;
export const SSL_OP_MSIE_SSLV2_RSA_PADDING = 0;
export const SSL_OP_NETSCAPE_CA_DN_BUG = 536870912;
export const SSL_OP_NETSCAPE_CHALLENGE_BUG = 2;
export const SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG = 1073741824;
export const SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG = 8;
export const SSL_OP_NO_COMPRESSION = 131072;
export const SSL_OP_NO_QUERY_MTU = 4096;
export const SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION = 65536;
export const SSL_OP_NO_SSLv2 = 16777216;
export const SSL_OP_NO_SSLv3 = 33554432;
export const SSL_OP_NO_TICKET = 16384;
export const SSL_OP_NO_TLSv1 = 67108864;
export const SSL_OP_NO_TLSv1_1 = 268435456;
export const SSL_OP_NO_TLSv1_2 = 134217728;
export const SSL_OP_PKCS1_CHECK_1 = 0;
export const SSL_OP_PKCS1_CHECK_2 = 0;
export const SSL_OP_SINGLE_DH_USE = 1048576;
export const SSL_OP_SINGLE_ECDH_USE = 524288;
export const SSL_OP_SSLEAY_080_CLIENT_DH_BUG = 128;
export const SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG = 0;
export const SSL_OP_TLS_BLOCK_PADDING_BUG = 512;
export const SSL_OP_TLS_D5_BUG = 256;
export const SSL_OP_TLS_ROLLBACK_BUG = 8388608;
export const ENGINE_METHOD_DSA = 2;
export const ENGINE_METHOD_DH = 4;
export const ENGINE_METHOD_RAND = 8;
export const ENGINE_METHOD_ECDH = 16;
export const ENGINE_METHOD_ECDSA = 32;
export const ENGINE_METHOD_CIPHERS = 64;
export const ENGINE_METHOD_DIGESTS = 128;
export const ENGINE_METHOD_STORE = 256;
export const ENGINE_METHOD_PKEY_METHS = 512;
export const ENGINE_METHOD_PKEY_ASN1_METHS = 1024;
export const ENGINE_METHOD_ALL = 65535;
export const ENGINE_METHOD_NONE = 0;
export const DH_CHECK_P_NOT_SAFE_PRIME = 2;
export const DH_CHECK_P_NOT_PRIME = 1;
export const DH_UNABLE_TO_CHECK_GENERATOR = 4;
export const DH_NOT_SUITABLE_GENERATOR = 8;
export const NPN_ENABLED = 1;
export const RSA_PKCS1_PADDING = 1;
export const RSA_SSLV23_PADDING = 2;
export const RSA_NO_PADDING = 3;
export const RSA_PKCS1_OAEP_PADDING = 4;
export const RSA_X931_PADDING = 5;
export const RSA_PKCS1_PSS_PADDING = 6;
export const POINT_CONVERSION_COMPRESSED = 2;
export const POINT_CONVERSION_UNCOMPRESSED = 4;
export const POINT_CONVERSION_HYBRID = 6;
export const F_OK = 0;
export const R_OK = 4;
export const W_OK = 2;
export const X_OK = 1;
export const UV_UDP_REUSEADDR = 4;