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| IPC_LISTEN(3) | libdill Library Functions | IPC_LISTEN(3) |
NAME
ipc_listen - starts listening for incoming IPC connectionsSYNOPSIS
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#include <libdill.h> int ipc_listen( const char* addr, int backlog);
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 starts listening for incoming IPC connections. The connections can be accepted using ipc_accept function.
addr: The filename to listen on.
backlog: Maximum number of connections that can be kept open without accepting them.
The socket can be closed either by hclose or ipc_close. Both ways are equivalent.
This function is not available if libdill is compiled with --disable-sockets option.
RETURN VALUE
In case of success the function returns newly created socket. In case of error it returns -1 and sets errno to one of the values below.ERRORS
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- EACCES: The process does not have appropriate privileges.
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- EADDRINUSE: The specified address is already in use.
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- EINVAL: Invalid argument.
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- ELOOP: A loop exists in symbolic links encountered during resolution of the pathname in address.
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- EMFILE: The maximum number of file descriptors in the process are already open.
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- ENAMETOOLONG: A component of a pathname exceeded NAME_MAX characters, or an entire pathname exceeded PATH_MAX characters.
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- ENFILE: The maximum number of file descriptors in the system are already open.
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- ENOENT: A component of the pathname does not name an existing file or the pathname is an empty string.
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- ENOMEM: Not enough memory.
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- ENOTDIR: A component of the path prefix of the pathname in address is not a directory.
EXAMPLE
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int ls = ipc_listen("/tmp/test.ipc", 10); int s = ipc_accept(ls, -1); bsend(s, "ABC", 3, -1); char buf[3]; brecv(s, buf, sizeof(buf), -1); ipc_close(s); ipc_close(ls);
SEE ALSO
brecv(3) brecvl(3) bsend(3) bsendl(3) hclose(3) ipc_accept(3) ipc_accept_mem(3) ipc_close(3) ipc_connect(3) ipc_connect_mem(3) ipc_done(3) ipc_fromfd(3) ipc_fromfd_mem(3) ipc_listen_mem(3) ipc_listener_fromfd(3) ipc_listener_fromfd_mem(3) ipc_pair(3) ipc_pair_mem(3)| libdill |
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