NetBSD/lib/libc/sys/getsockname.2

.\"	$NetBSD: getsockname.2,v 1.16 2002/02/08 01:28:18 ross Exp $
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.\"     @(#)getsockname.2	8.1 (Berkeley) 6/4/93
.\"
.Dd October 22, 2001
.Dt GETSOCKNAME 2
.Os
.Sh NAME
.Nm getsockname
.Nd get socket name
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include \*[Lt]sys/socket.h\*[Gt]
.Ft int
.Fn getsockname "int s" "struct sockaddr * restrict name" "socklen_t * restrict namelen"
.Sh DESCRIPTION
The
.Fn getsockname
system call returns the current
.Fa name
for the specified socket.
The
.Fa namelen
parameter should be initialized to indicate the amount of space
pointed to by
.Fa name .
On return it contains the actual size of the name returned (in
bytes).
.Sh RETURN VALUES
A 0 is returned if the call succeeds, -1 if it fails.
.Sh ERRORS
The call succeeds unless:
.Bl -tag -width Er
.It Bq Er EBADF
The argument
.Fa s
is not a valid descriptor.
.It Bq Er ENOTSOCK
The argument
.Fa s
is a file, not a socket.
.It Bq Er ENOBUFS
Insufficient resources were available in the system to perform the operation.
.It Bq Er EFAULT
The
.Fa name
parameter points to memory not in a valid part of the process address space.
.El
.Sh SEE ALSO
.Xr bind 2 ,
.Xr socket 2
.Sh HISTORY
The
.Fn getsockname
function call appeared in
.Bx 4.2 .
.Sh BUGS
Names bound to sockets in the
.Ux
domain are inaccessible;
.Fn getsockname
returns a zero length name.