fix EAGAIN error for stdin

bin/sql-formatter-cli.cjs

@@ -91,22 +91,62 @@ class PrettierSQLArgs {
     };
   }
 
-  getInput() {
-    const infile = this.args.file || process.stdin.fd;
+  readError(e) {
+    if (e.code === 'ENOENT') {
+      console.error(`Error: could not open file ${infile}`);
+      process.exit(1);
+    }
+    console.error('An unknown error has occurred, please file a bug report at:');
+    console.log('https://github.com/sql-formatter-org/sql-formatter/issues\n');
+    throw e;
+  }
+
+  stdinReadSync() {
+    const b = Buffer.alloc(1024);
+    let data = '';
+
+    while (true) {
+      let n = 0;
+
+      // Read while EAGAIN
+      while (true) {
+        try {
+          n = fs.readSync(process.stdin.fd, b, 0, b.length);
+          break;
+        } catch (e) {
+          if (e.code === 'EAGAIN') {
+            // Sleep 100ms
+            Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, 100);
+            continue;
+          }
+          this.readError(e);
+        }
+      }
+
+      if (!n) break;
+      data += b.toString('utf8', 0, n);
+    }
+
+    return data;
+  }
+
+  fileReadSync() {
     try {
-      return fs.readFileSync(infile, 'utf-8');
+      return fs.readFileSync(this.args.file, 'utf-8');
     } catch (e) {
       if (e.code === 'EAGAIN') {
         console.error('Error: no file specified and no data in stdin');
         process.exit(1);
       }
-      if (e.code === 'ENOENT') {
-        console.error(`Error: could not open file ${infile}`);
-        process.exit(1);
-      }
-      console.error('An unknown error has occurred, please file a bug report at:');
-      console.log('https://github.com/sql-formatter-org/sql-formatter/issues\n');
-      throw e;
+      this.readError(e);
+    }
+  }
+
+  getInput() {
+    if (this.args.file) {
+      return this.fileReadSync();
+    } else {
+      return this.stdinReadSync();
     }
   }