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IPC_CONNECT_MEM(3) libdill Library Functions IPC_CONNECT_MEM(3) NAME ipc_connect_mem - creates a connection to remote IPC endpoint SYNOPSIS #include <libdill.h> int ipc_connect_mem( const char* addr, struct ipc_storage* mem, int64_t deadline); DESCRIPTION IPC protocol is a bytestream protocol for transporting data among processes on the same machine. It is an equivalent to POSIX AF_LOCAL sockets. This function creates a connection to a remote IPC endpoint. This function allows to avoid one dynamic memory allocation by storing the object in user-supplied memory. Unless you are hyper-optimizing use ipc_connect instead. addr: Filename to connect to. mem: The structure to store the newly created object in. It must not be deallocated before the object is closed. deadline: A point in time when the operation should time out, in mil- liseconds. Use the now function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or re- turn without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed. The socket can be cleanly shut down using ipc_close function. This function is not available if libdill is compiled with --dis- able-sockets option. RETURN VALUE In case of success the function returns newly created socket handle. In case of error it returns -1 and sets errno to one of the values be- low. ERRORS • EACCES: The process does not have appropriate privileges. • ECANCELED: Current coroutine was canceled. • ECONNREFUSED: The target address was not listening for connections or refused the connection request. • ECONNRESET: Remote host reset the connection request. • EINVAL: Invalid argument. • ELOOP: A loop exists in symbolic links encountered during resolution of the pathname in address. • EMFILE: The maximum number of file descriptors in the process are al- ready open. • ENAMETOOLONG: A component of a pathname exceeded NAME_MAX characters, or an entire pathname exceeded PATH_MAX characters. • ENFILE: The maximum number of file descriptors in the system are al- ready open. • ENOENT: A component of the pathname does not name an existing file or the pathname is an empty string. • ENOMEM: Not enough memory. • ENOTDIR: A component of the path prefix of the pathname in address is not a directory. • ETIMEDOUT: Deadline was reached. EXAMPLE int s = ipc_connect("/tmp/test.ipc", -1); bsend(s, "ABC", 3, -1); char buf[3]; brecv(s, buf, sizeof(buf), -1); ipc_close(s); SEE ALSO brecv(3) brecvl(3) bsend(3) bsendl(3) hclose(3) ipc_accept(3) ipc_ac- cept_mem(3) ipc_close(3) ipc_connect(3) ipc_done(3) ipc_fromfd(3) ipc_fromfd_mem(3) ipc_listen(3) ipc_listen_mem(3) ipc_listen- er_fromfd(3) ipc_listener_fromfd_mem(3) ipc_pair(3) ipc_pair_mem(3) now(3) libdill IPC_CONNECT_MEM(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO
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