diff options
| author | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:54:44 -0400 |
|---|---|---|
| committer | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:54:44 -0400 |
| commit | a9157ce950dfe2fc30795d43b9d79b9d1bffc48b (patch) | |
| tree | 9df484304b560466d145e662c1c254ff0e9ae0ba /static/openbsd/man2/getpeername.2 | |
| parent | 160aa82b2d39c46ad33723d7d909cb4972efbb03 (diff) | |
docs: Added All OpenBSD Manuals
Diffstat (limited to 'static/openbsd/man2/getpeername.2')
| -rw-r--r-- | static/openbsd/man2/getpeername.2 | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/static/openbsd/man2/getpeername.2 b/static/openbsd/man2/getpeername.2 new file mode 100644 index 00000000..f507d168 --- /dev/null +++ b/static/openbsd/man2/getpeername.2 @@ -0,0 +1,143 @@ +.\" $OpenBSD: getpeername.2,v 1.27 2022/09/11 06:38:11 jmc Exp $ +.\" $NetBSD: getpeername.2,v 1.6 1995/10/12 15:40:56 jtc Exp $ +.\" +.\" Copyright (c) 1983, 1991, 1993 +.\" 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. 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 8.1 (Berkeley) 6/4/93 +.\" +.Dd $Mdocdate: September 11 2022 $ +.Dt GETPEERNAME 2 +.Os +.Sh NAME +.Nm getpeername +.Nd get name of connected peer +.Sh SYNOPSIS +.In sys/socket.h +.Ft int +.Fn getpeername "int s" "struct sockaddr *name" "socklen_t *namelen" +.Sh DESCRIPTION +.Fn getpeername +returns the address information of the peer connected to socket +.Fa s . +One common use occurs when a process inherits an open socket, such as +TCP servers forked from +.Xr inetd 8 . +In this scenario, +.Fn getpeername +is used to determine the connecting client's IP address. +.Pp +.Fn getpeername +takes three parameters: +.Pp +.Fa s +contains the file descriptor of the socket whose peer should be looked up. +.Pp +.Fa name +points to a +.Vt sockaddr +structure that will hold the address information for the connected peer. +Normal use requires one to use a structure +specific to the protocol family in use, such as +.Vt sockaddr_in +(IPv4) or +.Vt sockaddr_in6 +(IPv6), cast to a (struct sockaddr *). +.Pp +For greater portability, especially with the newer protocol families, the new +.Vt struct sockaddr_storage +should be used. +.Vt sockaddr_storage +is large enough to hold any of the other sockaddr_* variants. +On return, it can be cast to the correct sockaddr type, +based on the protocol family contained in its ss_family field. +.Pp +.Fa namelen +indicates the amount of space pointed to by +.Fa name , +in bytes. +.Pp +If address information for the local end of the socket is required, the +.Xr getsockname 2 +function should be used instead. +.Pp +If +.Fa name +does not point to enough space to hold the entire socket address, the +result will be truncated to +.Fa namelen +bytes. +.Sh RETURN VALUES +If the call succeeds, a 0 is returned and +.Fa namelen +is set to the actual size of the socket address returned in +.Fa name . +Otherwise, +.Va errno +is set and a value of \-1 is returned. +.Sh ERRORS +On failure, +.Va errno +is set to one of the following: +.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 ENOTCONN +The socket is not connected. +.It Bq Er ENOBUFS +Insufficient resources were available in the system +to perform the operation. +.It Bq Er EFAULT +The +.Fa name +or +.Fa namelen +parameter points to memory not in a valid part of the +process address space. +.El +.Sh SEE ALSO +.Xr accept 2 , +.Xr bind 2 , +.Xr getsockname 2 , +.Xr socket 2 , +.Xr getpeereid 3 +.Sh STANDARDS +The +.Fn getpeername +function conforms to +.St -p1003.1-2008 . +.Sh HISTORY +The +.Fn getpeername +function call appeared in +.Bx 4.2 . |
