getsockname(2) BSD System Calls Manual getsockname(2)
NAME
getsockname -- get socket name
SYNOPSIS
#include <sys/socket.h>
int
getsockname(int socket, struct sockaddr *restrict address,
socklen_t *restrict address_len);
DESCRIPTION
The getsockname() fynction returns the current address for the specified
socket.
The address_len parameter should be initialized to indicate the amount of
space pointed to by address. On return it contains the actual size of
the address returned (in bytes).
The address is truncated if the buffer provided is too small.
RETURN VALUES
The getsockname() function returns the value 0 if successful; otherwise
the value -1 is returned and the global variable errno is set to indicate
the error.
ERRORS
The getsockname() system call will succeed unless:
[EBADF] The argument socket is not a valid file descriptor.
[EFAULT] The address parameter points to memory not in a valid
part of the process address space.
[EINVAL] socket has been shut down.
[ENOBUFS] Insufficient resources were available in the system to
perform the operation.
[ENOTSOCK] The argument socket is not a socket (e.g., a plain
file).
[EOPNOTSUPP] getsockname() is not supported for the protocol in use
by socket.
SEE ALSO
bind(2), socket(2)
BUGS
Names bound to sockets in the UNIX domain are inaccessible; getsockname()
returns a zero-length address.
HISTORY
The getsockname() call appeared in 4.2BSD.
4.2 Berkeley Distribution June 4, 1993 4.2 Berkeley Distribution
Mac OS X 10.9.1 - Generated Mon Jan 6 06:06:26 CST 2014