HelenOS sources

pc_lpt_add        121 uspace/drv/char/pc-lpt/main.c 	return pc_lpt_add(pc_lpt, &res);
pc_lpt_add         73 uspace/drv/char/pc-lpt/pc-lpt.h extern errno_t pc_lpt_add(pc_lpt_t *, pc_lpt_res_t *);
HelenOS homepage, sources at GitHub