getsockname - get socket name
int getsockname(int sockfd, struct sockaddr *restrict addr,
socklen_t *restrict addrlen);
getsockname() returns the current address to which the socket
sockfd is bound, in the buffer pointed to by addr. The
addrlen argument should be initialized to indicate the amount of space
(in bytes) pointed to by addr. On return it contains the actual size of
the socket address.
The returned address is truncated if the buffer provided is too
small; in this case, addrlen will return a value greater than was
supplied to the call.
On success, zero is returned. On error, -1 is returned, and errno is set
to indicate the error.
POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (getsockname() first appeared in
For background on the socklen_t type, see accept(2).
This page is part of release 5.13 of the Linux man-pages project. A
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version of this page, can be found at https://www.kernel.org/doc/man-pages/.
- The argument sockfd is not a valid file descriptor.
- The addr argument points to memory not in a valid part of the
process address space.
- addrlen is invalid (e.g., is negative).
- Insufficient resources were available in the system to perform the
- The file descriptor sockfd does not refer to a socket.