HelenOS sources

IPC_PHONE_HUNGUP  436 kernel/generic/src/ipc/ipc.c 			if (phone->state == IPC_PHONE_HUNGUP)
IPC_PHONE_HUNGUP  467 kernel/generic/src/ipc/ipc.c 	    phone->state == IPC_PHONE_HUNGUP ||
IPC_PHONE_HUNGUP  493 kernel/generic/src/ipc/ipc.c 	phone->state = IPC_PHONE_HUNGUP;
IPC_PHONE_HUNGUP  948 kernel/generic/src/ipc/ipc.c 		case IPC_PHONE_HUNGUP:
HelenOS homepage, sources at GitHub