The child_process.execSync() method is generally identical to exec with the exception that the method will not return until the child process has fully closed. When a timeout has been encountered and killSignal is sent, the method won't return until the process has completely exited. If the child process intercepts and handles the SIGTERM signal and doesn't exit, the parent process will wait until the child process has exited.
If the process times out or has a non-zero exit code, this method will throw. The Error object will contain the entire result from spawnSync.
Never pass unsanitized user input to this function. Any input containing shell metacharacters may be used to trigger arbitrary command execution.