getpeername — get name of connected peer socket
#include <sys/socket.h>
int
getpeername( |
int | s, |
| struct sockaddr * | name, | |
| socklen_t * | namelen); |
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.
On success, zero is returned. On error, −1 is
returned, and errno is set
appropriately.
The argument s is not a valid
descriptor.
The name
parameter points to memory not in a valid part of the
process address space.
namelen is
invalid (e.g., is negative).
Insufficient resources were available in the system to perform the operation.
The socket is not connected.
The argument s is a file, not a
socket.
SVr4, 4.4BSD (the getpeername() function call first appeared
in 4.2BSD), POSIX.1-2001.
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).
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
|
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: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the 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 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 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 <faithcs.unc.edu> Modified Thu Jul 30 14:37:50 1993 by Martin Schulze <joeydebian.org> Modified Sun Mar 28 21:26:46 1999 by Andries Brouwer <aebcwi.nl> Modified 17 Jul 2002, Michael Kerrisk <mtk.manpagesgmail.com> Added 'socket' to NAME, so that "man -k socket" will show this page. |