_PATH_HALT
execle(_PATH_HALT, "fasthalt", "-l", nosync,
_PATH_HALT);
warn(_PATH_HALT);
execle(_PATH_HALT, "fasthalt", "-l", "-p", nosync,
_PATH_HALT);
warn(_PATH_HALT);
execle(_PATH_HALT, "fasthalt", "-l", "-c", nosync,
_PATH_HALT);
warn(_PATH_HALT);