HP-UX Reference (11i v3 07/02) - 2 System Calls (vol 5)

g
getsockname(2) getsockname(2)
NAME
getsockname - get socket address
SYNOPSIS
#include <sys/socket.h>
AF_CCITT Only
#include <x25/x25addrstr.h>
int getsockname(int s, void *addr, int *addrlen);
UNIX 03 Only (X/Open Sockets)
int getsockname(
int s,
struct sockaddr *__restrict addr,
socklen_t *__restrict addrlen
);
Obsolescent UNIX 95 Only (X/Open Sockets)
int getsockname(int s, struct sockaddr *addr, size_t *addrlen);
DESCRIPTION
getsockname() returns the local address of the socket indicated by s, where s is a socket descriptor.
addr points to a socket address structure in which this address is returned. addrlen points to a variable
that should be initialized to indicate the size of the address structure. On return it contains the actual size
of the address returned (in bytes). If addr does not point to enough space to contain the whole address of
the socket, only the first addrlen bytes of the address are returned.
AF_CCITT Only
The
x25_host[] field of the addr struct returns the X.25 addressing information of the local socket s.
The
x25ifname[] field of the addr struct contains the name of the local X.25 interface through which
the call arrived.
X/Open Sockets Compilation Environment
See xopen_networking(7).
RETURN VALUE
Upon successful completion,
getsockname()
returns 0; otherwise, it returns −1 and sets errno to
indicate the error.
ERRORS
getsockname() fails if any of the following conditions are encountered:
[EBADF] s is not a valid file descriptor.
[ENOTSOCK] s is a valid file descriptor, but it is not a socket.
[ENOBUFS] No buffer space is available to perform the operation.
[EFAULT] addr or addrlen are not valid pointers.
[EINVAL] The socket has been shut down.
[EOPNOTSUPP]
Operation not supported for AF_UNIX sockets.
[EINTR] The operation was interrupted by a signal. Application needs to retry the operation to
get the local address.
Not all possible errno values are documented in this manpage due to dependencies from the underlying
protocol modules.
OBSOLESCENCE
Currently, the socklen_t and size_t types are the same size. This is compatible with the UNIX 95
and UNIX 03 profiles. However, in a future release, socklen_t might be a different size. In that case,
passing a size_t pointer will evoke compile-time warnings, which must be corrected in order for the
application to behave correctly. Applications that use socklen_t now, where appropriate, will avoid
156 Hewlett-Packard Company − 1 − HP-UX 11i Version 3: February 2007