HelenOS sources

ipc_hangup       1056 uspace/lib/c/generic/async/client.c 	rc = ipc_hangup(phone);
ipc_hangup        106 uspace/lib/c/include/ipc/ipc.h extern errno_t ipc_hangup(cap_phone_handle_t);
ipc_hangup        106 uspace/lib/posix/include/libc/ipc/ipc.h extern errno_t ipc_hangup(cap_phone_handle_t);