HelenOS sources

pc_lpt_fun_online   49 uspace/drv/char/pc-lpt/main.c static errno_t pc_lpt_fun_online(ddf_fun_t *fun);
pc_lpt_fun_online   57 uspace/drv/char/pc-lpt/main.c 	.fun_online = pc_lpt_fun_online,
HelenOS homepage, sources at GitHub