nn_term - Man Page

notify all sockets about process termination


#include <nanomsg/nn.h>

void nn_term (void);


To help with shutdown of multi-threaded programs nanomsg provides the nn_term() function which closes all open sockets, and releases all related resources.

If a socket is blocked inside a blocking function, such as nn_recv(3), it will be unblocked  and EBADF error will be returned to the user.  Subsequent calls on such sockets will also return EBADF.

Attempting to open a new socket with nn_socket(3) will result in an ETERM error.

If waiting for NN_SNDFD or NN_RCVFD using a polling function, such as poll() or select(), the call will unblock with both NN_SNDFD and NN_RCVFD signaled.


s = nn_socket (AF_SP, NN_PAIR);
nn_term ();
rc = nn_send (s, "ABC", 3, 0);
assert (rc == -1 && errno == EBADF);

See Also

nn_close(3) nn_send(3) nn_socket(3) nn_recv(3) nanomsg(7)


Martin Sustrik Garrett D’Amore

Referenced By

nanomsg(7), nn_device(3).

2023-01-19 nanomsg 1.1.5