b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
143 lines
3.6 KiB
Groff
143 lines
3.6 KiB
Groff
.\"
|
|
.\" Copyright (c) 2001 Dima Dorfman.
|
|
.\" 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
.\"
|
|
.\" $FreeBSD: src/lib/libc/gen/getpeereid.3,v 1.6 2002/12/18 10:13:54 ru Exp $
|
|
.\"
|
|
.\" $NetBSD: getpeereid.3,v 1.2 2008/01/29 13:55:27 abs Exp $
|
|
.\"
|
|
.Dd August 8, 2007
|
|
.Dt GETPEEREID 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getpeereid
|
|
.Nd get the effective credentials of a UNIX-domain peer
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/types.h
|
|
.In unistd.h
|
|
.Ft int
|
|
.Fn getpeereid "int s" "uid_t *euid" "gid_t *egid"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn getpeereid
|
|
function returns the effective user and group IDs of the
|
|
peer connected to a
|
|
.Ux Ns -domain
|
|
socket.
|
|
The argument
|
|
.Fa s
|
|
must be a
|
|
.Ux Ns -domain
|
|
socket
|
|
.Pq Xr unix 4
|
|
of type
|
|
.Dv SOCK_STREAM
|
|
on which either
|
|
.Xr connect 2
|
|
has been called, or one returned from
|
|
.Xr accept 2
|
|
after
|
|
.Xr bind 2
|
|
and
|
|
.Xr listen 2
|
|
have been called.
|
|
If non-NULL, the effective used ID is placed in
|
|
.Fa euid ,
|
|
and the effective group ID in
|
|
.Fa egid .
|
|
.Pp
|
|
The credentials returned to the
|
|
.Xr accept 2
|
|
caller are those of its peer at the time it called
|
|
.Xr connect 2 ;
|
|
the credentials returned to the
|
|
.Xr connect 2
|
|
caller are those of its peer at the time it called
|
|
.Xr bind 2 .
|
|
This mechanism is reliable; there is no way for either side to influence
|
|
the credentials returned to its peer except by calling the appropriate
|
|
system call (i.e., either
|
|
.Xr connect 2
|
|
or
|
|
.Xr bind 2 )
|
|
under different effective credentials.
|
|
.Pp
|
|
One common use of this routine is for a
|
|
.Ux Ns -domain
|
|
server
|
|
to verify the credentials of its client.
|
|
Likewise, the client can verify the credentials of the server.
|
|
.Sh IMPLEMENTATION NOTES
|
|
On
|
|
.Nx ,
|
|
.Fn getpeereid
|
|
is implemented in terms of the
|
|
.Dv LOCAL_PEEREID
|
|
.Xr unix 4
|
|
socket option.
|
|
.Sh RETURN VALUES
|
|
.Rv -std getpeereid
|
|
.Sh ERRORS
|
|
The
|
|
.Fn getpeereid
|
|
function
|
|
fails if:
|
|
.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 argument
|
|
.Fa s
|
|
does not refer to a socket on which
|
|
.Xr connect 2
|
|
have been called nor one returned from
|
|
.Xr listen 2 .
|
|
.It Bq Er EINVAL
|
|
The argument
|
|
.Fa s
|
|
does not refer to a socket of type
|
|
.Dv SOCK_STREAM ,
|
|
or the kernel returned invalid data.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr connect 2 ,
|
|
.Xr getpeername 2 ,
|
|
.Xr getsockname 2 ,
|
|
.Xr getsockopt 2 ,
|
|
.Xr listen 2 ,
|
|
.Xr unix 4
|
|
.Sh HISTORY
|
|
The
|
|
.Fn getpeereid
|
|
function appeared in
|
|
.Nx 5.0 .
|