HelenOS sources

SERVICE_DEVMAN     49 uspace/lib/c/include/ipc/services.h 	SERVICE_DEVMAN     = FOURCC('d', 'e', 'v', 'n'),
SERVICE_DEVMAN     49 uspace/lib/posix/include/libc/ipc/services.h 	SERVICE_DEVMAN     = FOURCC('d', 'e', 'v', 'n'),
HelenOS homepage, sources at GitHub