if(f < 0 || f > max_fan_level) f = max_fan_level;
sprintf(buffer, "level %d\n", f);
if(write(fan_fd, buffer, strlen(buffer)) < 0) {
if(f < 0 || f > max_fan_level) f = max_fan_level;
sprintf(buffer, "level %d\n", f);
if(write(fan_fd, buffer, strlen(buffer)) < 0) {