in web/cli/src/index.ts [88:96]
function readAndValidate(file: string): Buffer {
let contents = readFileSync(file);
let first_word = contents.readUIntLE(0, 4);
if (first_word === GLB_MAGIC) {
return contents;
}
console.error("File %s is not a GLB file: starts with 0x%s.", file, first_word.toString(16));
process.exit(1);
}