freebsd/lib/libc/sys/getsockname.2

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.\"     @(#)getsockname.2	8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd June 4, 1993
.Dt GETSOCKNAME 2
.Os
.Sh NAME
.Nm getsockname
.Nd get socket name
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/socket.h
.Ft int
.Fn getsockname "int s" "struct sockaddr *name" "socklen_t *namelen"
.Sh DESCRIPTION
The
.Fn getsockname
system call
returns the current
.Fa name
for the specified socket.  The
.Fa namelen
argument 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
.Rv -std getsockname
.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 ECONNRESET
The connection has been reset by the peer.
.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
argument points to memory not in a valid part of the
process address space.
.El
.Sh SEE ALSO
.Xr bind 2 ,
.Xr getpeername 2 ,
.Xr socket 2
.Sh BUGS
Names bound to sockets in the UNIX domain are inaccessible;
.Xr getsockname
returns a zero length name.
.Sh HISTORY
The
.Fn getsockname
system call appeared in
.Bx 4.2 .