getsockname - get socket name
int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
() returns the current address to which the socket
is bound, in the buffer pointed to by addr
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
will return a value greater than was supplied to the
On success, zero is returned. On error, -1 is returned, and errno
- The argument sockfd is not a valid 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 argument sockfd is a file, not a socket.
SVr4, 4.4BSD (the getsockname
() function call appeared in 4.2BSD),
The third argument of getsockname
() is in reality an int *
(and this is what 4.x BSD and libc4 and libc5 have). Some POSIX confusion
resulted in the present socklen_t
, also used by glibc. See also
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