Name
getpeername — get name of connected peer socket
Synopsis
#include <sys/socket.h>
int
getpeername( |
int |
s, |
|
struct sockaddr
* |
name, |
|
socklen_t * |
namelen) ; |
DESCRIPTION
getpeername
() returns the
name of the peer connected to socket s
. The namelen
parameter should be
initialized to indicate the amount of space pointed to by
name
. On return it
contains the actual size of the name returned (in bytes). The
name is truncated if the buffer provided is too small.
RETURN VALUE
On success, zero is returned. On error, −1 is
returned, and errno
is set
appropriately.
ERRORS
- EBADF
-
The argument s
is not a valid
descriptor.
- EFAULT
-
The name
parameter points to memory not in a valid part of the
process address space.
- EINVAL
-
namelen
is
invalid (e.g., is negative).
- ENOBUFS
-
Insufficient resources were available in the system
to perform the operation.
- ENOTCONN
-
The socket is not connected.
- ENOTSOCK
-
The argument s
is a file, not a
socket.
CONFORMING TO
SVr4, 4.4BSD (the getpeername
() function call first appeared
in 4.2BSD), POSIX.1-2001.
NOTE
The third argument of getpeername
() 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 accept(2).
SEE ALSO
accept(2), bind(2), getsockname(2)
Copyright (c) 1983, 1991 The Regents of the University of California.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
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notice, this list of conditions and the following disclaimer.
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documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)getpeername.2
6.5 (Berkeley) 3/10/91
Modified Sat Jul 24 16:37:50 1993 by Rik Faith <faith@cs.unc.edu>
Modified Thu Jul 30 14:37:50 1993 by Martin Schulze <joey@debian.org>
Modified Sun Mar 28 21:26:46 1999 by Andries Brouwer <aeb@cwi.nl>
Modified 17 Jul 2002, Michael Kerrisk <mtk-manpages@gmx.net>
Added 'socket' to NAME, so that "man -k socket" will show this page.
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