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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
.\" Portions extracted from /usr/include/sys/socket.h, which does not have
.\" any authorship information in it. It is probably available under the GPL.
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\"
.\" Other portions are from the 6.9 (Berkeley) 3/10/91 man page:
.\"
.\" Copyright (c) 1983 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
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\"
.\" Modified Mon Oct 21 23:05:29 EDT 1996 by Eric S. Raymond <esr@thyrsus.com>
.TH BIND 2 "23 July 1993" "Linux 0.99.11" "Linux Programmer's Manual"
.SH NAME
bind \- bind a name to a socket
.SH SYNOPSIS
.B #include <sys/types.h>
.br
.B #include <sys/socket.h>
.sp
.BI "int bind(int " sockfd ", struct sockaddr *" my_addr ", socklen_t " addrlen );
.SH DESCRIPTION
.B bind
gives the socket,
.IR sockfd ,
the local address
.IR my_addr .
.I my_addr
is
.I addrlen
bytes long. Traditionally, this is called "assigning a name to a socket"
(when a socket is created with
.BR socket (2),
it exists in a name space (address family) but has no name assigned.)
.SH NOTES
Binding a name in the UNIX domain creates a socket in the file system
that must be deleted by the caller when it is no longer needed (using
.BR unlink (2)).
The rules used in name binding vary between communication domains. Consult
the manual entries in section 4 for detailed information.
.SH "RETURN VALUE"
On success, zero is returned. On error, \-1 is returned, and
.I errno
is set appropriately.
.SH ERRORS
.TP 0.8i
.B EBADF
.I sockfd
is not a valid descriptor.
.TP
.B EINVAL
The socket is already bound to an address. This may change in the future:
see
.I linux/unix/sock.c
for details.
.TP
.B EACCES
The address is protected, and the user is not the super-user.
.TP
.B ENOTSOCK
Argument is a descriptor for a file, not a socket.
.PP
The following errors are specific to UNIX domain (AF_UNIX) sockets:
.TP 0.8i
.B EINVAL
The
.I addr_len
was wrong, or the socket was not in the
.B AF_UNIX
family.
.TP
.B EROFS
The socket inode would reside on a read-only file system.
.TP
.B EFAULT
.I my_addr
points outside your accessible address space.
.TP
.B ENAMETOOLONG
.I my_addr
is too long.
.TP
.B ENOENT
The file does not exist.
.TP
.B ENOMEM
Insufficient kernel memory was available.
.TP
.B ENOTDIR
A component of the path prefix is not a directory.
.TP
.B EACCES
Search permission is denied on a component of the path prefix.
.TP
.B ELOOP
Too many symbolic links were encountered in resolving
.IR my_addr .
.SH CONFORMING TO
SVr4, 4.4BSD (the
.B bind
function first appeared in BSD 4.2). SVr4 documents additional
EADDRNOTAVAIL, EADDRINUSE, ENOSR general error conditions, and
additional EIO, EISDIR and EROFS Unix-domain error conditions.
.SH "SEE ALSO"
.BR accept "(2), " connect "(2), " listen "(2), "
.BR socket "(2), " getsockname (2)
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