getsockname - get socket name
Standard C library (
libc,
-lc)
#include <sys/socket.h>
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.
- EBADF
- The argument sockfd is not a valid file
descriptor.
- EFAULT
- The addr argument points to memory not in a valid
part of the process address space.
- EINVAL
-
addrlen is invalid (e.g., is negative).
- ENOBUFS
- Insufficient resources were available in the system to
perform the operation.
- ENOTSOCK
- The file descriptor sockfd does not refer to a
socket.
POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (
getsockname() first appeared in
4.2BSD).
For background on the
socklen_t type, see
accept(2).
bind(2),
socket(2),
getifaddrs(3),
ip(7),
socket(7),
unix(7)