diff --git a/playground/playground.js b/playground/playground.js
index a0bdd5b..7d16a2d 100644
--- a/playground/playground.js
+++ b/playground/playground.js
@@ -1167,183 +1167,6 @@ function dbg(...args) {
       assert(false, 'Exception thrown, but exception catching is not enabled. Compile with -sNO_DISABLE_EXCEPTION_CATCHING or -sEXCEPTION_CATCHING_ALLOWED=[..] to catch.');
     };
 
-  var _abort = () => {
-      abort('native code called abort()');
-    };
-
-  var _emscripten_memcpy_js = (dest, src, num) => HEAPU8.copyWithin(dest, src, src + num);
-
-  var getHeapMax = () =>
-      // Stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate
-      // full 4GB Wasm memories, the size will wrap back to 0 bytes in Wasm side
-      // for any code that deals with heap sizes, which would require special
-      // casing all heap size related code to treat 0 specially.
-      2147483648;
-  
-  var growMemory = (size) => {
-      var b = wasmMemory.buffer;
-      var pages = (size - b.byteLength + 65535) / 65536;
-      try {
-        // round size grow request up to wasm page size (fixed 64KB per spec)
-        wasmMemory.grow(pages); // .grow() takes a delta compared to the previous size
-        updateMemoryViews();
-        return 1 /*success*/;
-      } catch(e) {
-        err(`growMemory: Attempted to grow heap from ${b.byteLength} bytes to ${size} bytes, but got error: ${e}`);
-      }
-      // implicit 0 return to save code size (caller will cast "undefined" into 0
-      // anyhow)
-    };
-  var _emscripten_resize_heap = (requestedSize) => {
-      var oldSize = HEAPU8.length;
-      // With CAN_ADDRESS_2GB or MEMORY64, pointers are already unsigned.
-      requestedSize >>>= 0;
-      // With multithreaded builds, races can happen (another thread might increase the size
-      // in between), so return a failure, and let the caller retry.
-      assert(requestedSize > oldSize);
-  
-      // Memory resize rules:
-      // 1.  Always increase heap size to at least the requested size, rounded up
-      //     to next page multiple.
-      // 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap
-      //     geometrically: increase the heap size according to
-      //     MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%), At most
-      //     overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
-      // 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap
-      //     linearly: increase the heap size by at least
-      //     MEMORY_GROWTH_LINEAR_STEP bytes.
-      // 3.  Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by
-      //     MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
-      // 4.  If we were unable to allocate as much memory, it may be due to
-      //     over-eager decision to excessively reserve due to (3) above.
-      //     Hence if an allocation fails, cut down on the amount of excess
-      //     growth, in an attempt to succeed to perform a smaller allocation.
-  
-      // A limit is set for how much we can grow. We should not exceed that
-      // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
-      var maxHeapSize = getHeapMax();
-      if (requestedSize > maxHeapSize) {
-        err(`Cannot enlarge memory, requested ${requestedSize} bytes, but the limit is ${maxHeapSize} bytes!`);
-        return false;
-      }
-  
-      var alignUp = (x, multiple) => x + (multiple - x % multiple) % multiple;
-  
-      // Loop through potential heap size increases. If we attempt a too eager
-      // reservation that fails, cut down on the attempted size and reserve a
-      // smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
-      for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
-        var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
-        // but limit overreserving (default to capping at +96MB overgrowth at most)
-        overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
-  
-        var newSize = Math.min(maxHeapSize, alignUp(Math.max(requestedSize, overGrownHeapSize), 65536));
-  
-        var replacement = growMemory(newSize);
-        if (replacement) {
-  
-          return true;
-        }
-      }
-      err(`Failed to grow the heap from ${oldSize} bytes to ${newSize} bytes, not enough memory!`);
-      return false;
-    };
-
-  var ENV = {
-  };
-  
-  var getExecutableName = () => {
-      return thisProgram || './this.program';
-    };
-  var getEnvStrings = () => {
-      if (!getEnvStrings.strings) {
-        // Default values.
-        // Browser language detection #8751
-        var lang = ((typeof navigator == 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
-        var env = {
-          'USER': 'web_user',
-          'LOGNAME': 'web_user',
-          'PATH': '/',
-          'PWD': '/',
-          'HOME': '/home/web_user',
-          'LANG': lang,
-          '_': getExecutableName()
-        };
-        // Apply the user-provided values, if any.
-        for (var x in ENV) {
-          // x is a key in ENV; if ENV[x] is undefined, that means it was
-          // explicitly set to be so. We allow user code to do that to
-          // force variables with default values to remain unset.
-          if (ENV[x] === undefined) delete env[x];
-          else env[x] = ENV[x];
-        }
-        var strings = [];
-        for (var x in env) {
-          strings.push(`${x}=${env[x]}`);
-        }
-        getEnvStrings.strings = strings;
-      }
-      return getEnvStrings.strings;
-    };
-  
-  var stringToAscii = (str, buffer) => {
-      for (var i = 0; i < str.length; ++i) {
-        assert(str.charCodeAt(i) === (str.charCodeAt(i) & 0xff));
-        HEAP8[buffer++] = str.charCodeAt(i);
-      }
-      // Null-terminate the string
-      HEAP8[buffer] = 0;
-    };
-  var _environ_get = (__environ, environ_buf) => {
-      var bufSize = 0;
-      getEnvStrings().forEach((string, i) => {
-        var ptr = environ_buf + bufSize;
-        HEAPU32[(((__environ)+(i*4))>>2)] = ptr;
-        stringToAscii(string, ptr);
-        bufSize += string.length + 1;
-      });
-      return 0;
-    };
-
-  var _environ_sizes_get = (penviron_count, penviron_buf_size) => {
-      var strings = getEnvStrings();
-      HEAPU32[((penviron_count)>>2)] = strings.length;
-      var bufSize = 0;
-      strings.forEach((string) => bufSize += string.length + 1);
-      HEAPU32[((penviron_buf_size)>>2)] = bufSize;
-      return 0;
-    };
-
-  
-  var runtimeKeepaliveCounter = 0;
-  var keepRuntimeAlive = () => noExitRuntime || runtimeKeepaliveCounter > 0;
-  var _proc_exit = (code) => {
-      EXITSTATUS = code;
-      if (!keepRuntimeAlive()) {
-        Module['onExit']?.(code);
-        ABORT = true;
-      }
-      quit_(code, new ExitStatus(code));
-    };
-  
-  /** @suppress {duplicate } */
-  /** @param {boolean|number=} implicit */
-  var exitJS = (status, implicit) => {
-      EXITSTATUS = status;
-  
-      checkUnflushedContent();
-  
-      // if exit() was called explicitly, warn the user if the runtime isn't actually being shut down
-      if (keepRuntimeAlive() && !implicit) {
-        var msg = `program exited (with status: ${status}), but keepRuntimeAlive() is set (counter=${runtimeKeepaliveCounter}) due to an async operation, so halting execution but not exiting the runtime or preventing further async execution (you can use emscripten_force_exit, if you want to force a true shutdown)`;
-        readyPromiseReject(msg);
-        err(msg);
-      }
-  
-      _proc_exit(status);
-    };
-  var _exit = exitJS;
-
   var PATH = {
   isAbs:(path) => path.charAt(0) === '/',
   splitPath:(filename) => {
@@ -4208,6 +4031,367 @@ function dbg(...args) {
         return stream;
       },
   };
+  function ___syscall_faccessat(dirfd, path, amode, flags) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      assert(flags === 0);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      if (amode & ~7) {
+        // need a valid mode
+        return -28;
+      }
+      var lookup = FS.lookupPath(path, { follow: true });
+      var node = lookup.node;
+      if (!node) {
+        return -44;
+      }
+      var perms = '';
+      if (amode & 4) perms += 'r';
+      if (amode & 2) perms += 'w';
+      if (amode & 1) perms += 'x';
+      if (perms /* otherwise, they've just passed F_OK */ && FS.nodePermissions(node, perms)) {
+        return -2;
+      }
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_fcntl64(fd, cmd, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      switch (cmd) {
+        case 0: {
+          var arg = SYSCALLS.get();
+          if (arg < 0) {
+            return -28;
+          }
+          while (FS.streams[arg]) {
+            arg++;
+          }
+          var newStream;
+          newStream = FS.dupStream(stream, arg);
+          return newStream.fd;
+        }
+        case 1:
+        case 2:
+          return 0;  // FD_CLOEXEC makes no sense for a single process.
+        case 3:
+          return stream.flags;
+        case 4: {
+          var arg = SYSCALLS.get();
+          stream.flags |= arg;
+          return 0;
+        }
+        case 12: {
+          var arg = SYSCALLS.getp();
+          var offset = 0;
+          // We're always unlocked.
+          HEAP16[(((arg)+(offset))>>1)] = 2;
+          return 0;
+        }
+        case 13:
+        case 14:
+          return 0; // Pretend that the locking is successful.
+      }
+      return -28;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_ioctl(fd, op, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      switch (op) {
+        case 21509: {
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        case 21505: {
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tcgets) {
+            var termios = stream.tty.ops.ioctl_tcgets(stream);
+            var argp = SYSCALLS.getp();
+            HEAP32[((argp)>>2)] = termios.c_iflag || 0;
+            HEAP32[(((argp)+(4))>>2)] = termios.c_oflag || 0;
+            HEAP32[(((argp)+(8))>>2)] = termios.c_cflag || 0;
+            HEAP32[(((argp)+(12))>>2)] = termios.c_lflag || 0;
+            for (var i = 0; i < 32; i++) {
+              HEAP8[(argp + i)+(17)] = termios.c_cc[i] || 0;
+            }
+            return 0;
+          }
+          return 0;
+        }
+        case 21510:
+        case 21511:
+        case 21512: {
+          if (!stream.tty) return -59;
+          return 0; // no-op, not actually adjusting terminal settings
+        }
+        case 21506:
+        case 21507:
+        case 21508: {
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tcsets) {
+            var argp = SYSCALLS.getp();
+            var c_iflag = HEAP32[((argp)>>2)];
+            var c_oflag = HEAP32[(((argp)+(4))>>2)];
+            var c_cflag = HEAP32[(((argp)+(8))>>2)];
+            var c_lflag = HEAP32[(((argp)+(12))>>2)];
+            var c_cc = []
+            for (var i = 0; i < 32; i++) {
+              c_cc.push(HEAP8[(argp + i)+(17)]);
+            }
+            return stream.tty.ops.ioctl_tcsets(stream.tty, op, { c_iflag, c_oflag, c_cflag, c_lflag, c_cc });
+          }
+          return 0; // no-op, not actually adjusting terminal settings
+        }
+        case 21519: {
+          if (!stream.tty) return -59;
+          var argp = SYSCALLS.getp();
+          HEAP32[((argp)>>2)] = 0;
+          return 0;
+        }
+        case 21520: {
+          if (!stream.tty) return -59;
+          return -28; // not supported
+        }
+        case 21531: {
+          var argp = SYSCALLS.getp();
+          return FS.ioctl(stream, op, argp);
+        }
+        case 21523: {
+          // TODO: in theory we should write to the winsize struct that gets
+          // passed in, but for now musl doesn't read anything on it
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tiocgwinsz) {
+            var winsize = stream.tty.ops.ioctl_tiocgwinsz(stream.tty);
+            var argp = SYSCALLS.getp();
+            HEAP16[((argp)>>1)] = winsize[0];
+            HEAP16[(((argp)+(2))>>1)] = winsize[1];
+          }
+          return 0;
+        }
+        case 21524: {
+          // TODO: technically, this ioctl call should change the window size.
+          // but, since emscripten doesn't have any concept of a terminal window
+          // yet, we'll just silently throw it away as we do TIOCGWINSZ
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        case 21515: {
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        default: return -28; // not supported
+      }
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_openat(dirfd, path, flags, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      var mode = varargs ? SYSCALLS.get() : 0;
+      return FS.open(path, flags, mode).fd;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  var _abort = () => {
+      abort('native code called abort()');
+    };
+
+  var _emscripten_memcpy_js = (dest, src, num) => HEAPU8.copyWithin(dest, src, src + num);
+
+  var getHeapMax = () =>
+      // Stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate
+      // full 4GB Wasm memories, the size will wrap back to 0 bytes in Wasm side
+      // for any code that deals with heap sizes, which would require special
+      // casing all heap size related code to treat 0 specially.
+      2147483648;
+  
+  var growMemory = (size) => {
+      var b = wasmMemory.buffer;
+      var pages = (size - b.byteLength + 65535) / 65536;
+      try {
+        // round size grow request up to wasm page size (fixed 64KB per spec)
+        wasmMemory.grow(pages); // .grow() takes a delta compared to the previous size
+        updateMemoryViews();
+        return 1 /*success*/;
+      } catch(e) {
+        err(`growMemory: Attempted to grow heap from ${b.byteLength} bytes to ${size} bytes, but got error: ${e}`);
+      }
+      // implicit 0 return to save code size (caller will cast "undefined" into 0
+      // anyhow)
+    };
+  var _emscripten_resize_heap = (requestedSize) => {
+      var oldSize = HEAPU8.length;
+      // With CAN_ADDRESS_2GB or MEMORY64, pointers are already unsigned.
+      requestedSize >>>= 0;
+      // With multithreaded builds, races can happen (another thread might increase the size
+      // in between), so return a failure, and let the caller retry.
+      assert(requestedSize > oldSize);
+  
+      // Memory resize rules:
+      // 1.  Always increase heap size to at least the requested size, rounded up
+      //     to next page multiple.
+      // 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap
+      //     geometrically: increase the heap size according to
+      //     MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%), At most
+      //     overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
+      // 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap
+      //     linearly: increase the heap size by at least
+      //     MEMORY_GROWTH_LINEAR_STEP bytes.
+      // 3.  Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by
+      //     MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
+      // 4.  If we were unable to allocate as much memory, it may be due to
+      //     over-eager decision to excessively reserve due to (3) above.
+      //     Hence if an allocation fails, cut down on the amount of excess
+      //     growth, in an attempt to succeed to perform a smaller allocation.
+  
+      // A limit is set for how much we can grow. We should not exceed that
+      // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
+      var maxHeapSize = getHeapMax();
+      if (requestedSize > maxHeapSize) {
+        err(`Cannot enlarge memory, requested ${requestedSize} bytes, but the limit is ${maxHeapSize} bytes!`);
+        return false;
+      }
+  
+      var alignUp = (x, multiple) => x + (multiple - x % multiple) % multiple;
+  
+      // Loop through potential heap size increases. If we attempt a too eager
+      // reservation that fails, cut down on the attempted size and reserve a
+      // smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
+      for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
+        var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
+        // but limit overreserving (default to capping at +96MB overgrowth at most)
+        overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
+  
+        var newSize = Math.min(maxHeapSize, alignUp(Math.max(requestedSize, overGrownHeapSize), 65536));
+  
+        var replacement = growMemory(newSize);
+        if (replacement) {
+  
+          return true;
+        }
+      }
+      err(`Failed to grow the heap from ${oldSize} bytes to ${newSize} bytes, not enough memory!`);
+      return false;
+    };
+
+  var ENV = {
+  };
+  
+  var getExecutableName = () => {
+      return thisProgram || './this.program';
+    };
+  var getEnvStrings = () => {
+      if (!getEnvStrings.strings) {
+        // Default values.
+        // Browser language detection #8751
+        var lang = ((typeof navigator == 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
+        var env = {
+          'USER': 'web_user',
+          'LOGNAME': 'web_user',
+          'PATH': '/',
+          'PWD': '/',
+          'HOME': '/home/web_user',
+          'LANG': lang,
+          '_': getExecutableName()
+        };
+        // Apply the user-provided values, if any.
+        for (var x in ENV) {
+          // x is a key in ENV; if ENV[x] is undefined, that means it was
+          // explicitly set to be so. We allow user code to do that to
+          // force variables with default values to remain unset.
+          if (ENV[x] === undefined) delete env[x];
+          else env[x] = ENV[x];
+        }
+        var strings = [];
+        for (var x in env) {
+          strings.push(`${x}=${env[x]}`);
+        }
+        getEnvStrings.strings = strings;
+      }
+      return getEnvStrings.strings;
+    };
+  
+  var stringToAscii = (str, buffer) => {
+      for (var i = 0; i < str.length; ++i) {
+        assert(str.charCodeAt(i) === (str.charCodeAt(i) & 0xff));
+        HEAP8[buffer++] = str.charCodeAt(i);
+      }
+      // Null-terminate the string
+      HEAP8[buffer] = 0;
+    };
+  var _environ_get = (__environ, environ_buf) => {
+      var bufSize = 0;
+      getEnvStrings().forEach((string, i) => {
+        var ptr = environ_buf + bufSize;
+        HEAPU32[(((__environ)+(i*4))>>2)] = ptr;
+        stringToAscii(string, ptr);
+        bufSize += string.length + 1;
+      });
+      return 0;
+    };
+
+  var _environ_sizes_get = (penviron_count, penviron_buf_size) => {
+      var strings = getEnvStrings();
+      HEAPU32[((penviron_count)>>2)] = strings.length;
+      var bufSize = 0;
+      strings.forEach((string) => bufSize += string.length + 1);
+      HEAPU32[((penviron_buf_size)>>2)] = bufSize;
+      return 0;
+    };
+
+  
+  var runtimeKeepaliveCounter = 0;
+  var keepRuntimeAlive = () => noExitRuntime || runtimeKeepaliveCounter > 0;
+  var _proc_exit = (code) => {
+      EXITSTATUS = code;
+      if (!keepRuntimeAlive()) {
+        Module['onExit']?.(code);
+        ABORT = true;
+      }
+      quit_(code, new ExitStatus(code));
+    };
+  
+  /** @suppress {duplicate } */
+  /** @param {boolean|number=} implicit */
+  var exitJS = (status, implicit) => {
+      EXITSTATUS = status;
+  
+      checkUnflushedContent();
+  
+      // if exit() was called explicitly, warn the user if the runtime isn't actually being shut down
+      if (keepRuntimeAlive() && !implicit) {
+        var msg = `program exited (with status: ${status}), but keepRuntimeAlive() is set (counter=${runtimeKeepaliveCounter}) due to an async operation, so halting execution but not exiting the runtime or preventing further async execution (you can use emscripten_force_exit, if you want to force a true shutdown)`;
+        readyPromiseReject(msg);
+        err(msg);
+      }
+  
+      _proc_exit(status);
+    };
+  var _exit = exitJS;
+
   function _fd_close(fd) {
   try {
   
@@ -4715,6 +4899,14 @@ var wasmImports = {
   /** @export */
   __cxa_throw: ___cxa_throw,
   /** @export */
+  __syscall_faccessat: ___syscall_faccessat,
+  /** @export */
+  __syscall_fcntl64: ___syscall_fcntl64,
+  /** @export */
+  __syscall_ioctl: ___syscall_ioctl,
+  /** @export */
+  __syscall_openat: ___syscall_openat,
+  /** @export */
   abort: _abort,
   /** @export */
   emscripten_memcpy_js: _emscripten_memcpy_js,
diff --git a/playground/playground.wasm b/playground/playground.wasm
index 42ff2c8..d5da84c 100755
Binary files a/playground/playground.wasm and b/playground/playground.wasm differ