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 millisec- onds. Use the now function to get your current point in time. 0 means im- mediate timeout, i.e., perform the operation if possible or return 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 --disable-sock- ets 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 below. ERRORS * EACCES: The process does not have appropriate privileges. * ECANCELED: Current coroutine was canceled. * ECONNREFUSED: The target address was not listening for connections or re- fused 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 already 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 already 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_listener_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
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=ipc_connect_mem&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>