Query: listen
OS: mojave
Section: 2
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
LISTEN(2) BSD System Calls Manual LISTEN(2)NAMElisten -- listen for connections on a socketSYNOPSIS#include <sys/socket.h> int listen(int socket, int backlog);DESCRIPTIONCreation of socket-based connections requires several operations. First, a socket is created with socket(2). Next, a willingness to accept incoming connections and a queue limit for incoming connections are specified with listen(). Finally, the connections are accepted with accept(2). The listen() call applies only to sockets of type SOCK_STREAM. The backlog parameter defines the maximum length for the queue of pending connections. If a connection request arrives with the queue full, the client may receive an error with an indication of ECONNREFUSED. Alternatively, if the underlying protocol supports retransmission, the request may be ignored so that retries may succeed.RETURN VALUESThe listen() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.ERRORSlisten() will fail if: [EACCES] The current process has insufficient privileges. [EBADF] The argument socket is not a valid file descriptor. [EDESTADDRREQ] The socket is not bound to a local address and the protocol does not support listening on an unbound socket. [EINVAL] socket is already connected. [ENOTSOCK] The argument socket does not reference a socket. [EOPNOTSUPP] The socket is not of a type that supports the operation listen().SEE ALSOaccept(2), connect(2), connectx(2), socket(2)BUGSThe backlog is currently limited (silently) to 128.HISTORYThe listen() function call appeared in 4.2BSD. 4.2 Berkeley Distribution March 18, 2015 4.2 Berkeley Distribution
Related Man Pages |
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listen(3p) - centos |
listen(3p) - suse |
listen(2) - osf1 |
listen(3socket) - sunos |
listen(2) - freebsd |