int bind(int socket, const struct sockaddr *address,
socklen_taddress_len);
DESCRIPTION
The bind() function shall assign a local socket address address
to a socket identified by descriptor socket
that has no local socket address assigned. Sockets created with the
socket() function
are initially unnamed; they are identified only by their address family.
The bind() function takes the following arguments:
socket
Specifies the file descriptor of the socket to be bound.
address
Points to a sockaddr structure containing the address to be
bound to the socket. The length and format of the address
depend on the address family of the socket.
address_len
Specifies the length of the sockaddr structure pointed to by
the address argument.
The socket specified by socket may require the process to have
appropriate privileges to use the bind()
function.
RETURN VALUE
Upon successful completion, bind() shall return 0; otherwise,
-1 shall be returned and errno set to indicate the
error.
ERRORS
The bind() function shall fail if:
EADDRINUSE
The specified address is already in use.
EADDRNOTAVAIL
The specified address is not available from the local machine.
EAFNOSUPPORT
The specified address is not a valid address for the address family
of the specified socket.
EBADF
The socket argument is not a valid file descriptor.
EINVAL
The socket is already bound to an address, and the protocol does not
support binding to a new address; or the socket has been
shut down.
ENOTSOCK
The socket argument does not refer to a socket.
EOPNOTSUPP
The socket type of the specified socket does not support binding to
an address.
If the address family of the socket is AF_UNIX, then bind()
shall fail if:
EACCES
A component of the path prefix denies search permission, or the requested
name requires writing in a directory with a mode that
denies write permission.
EDESTADDRREQ] or [EISDIR
The address argument is a null pointer.
EIO
An I/O error occurred.
ELOOP
A loop exists in symbolic links encountered during resolution of the
pathname in address.
ENAMETOOLONG
A component of a pathname exceeded {NAME_MAX} characters, or an entire
pathname exceeded {PATH_MAX} characters.
ENOENT
A component of the pathname does not name an existing file or the
pathname is an empty string.
ENOTDIR
A component of the path prefix of the pathname in address is
not a directory.
EROFS
The name would reside on a read-only file system.
The bind() function may fail if:
EACCES
The specified address is protected and the current user does not have
permission to bind to it.
EINVAL
The address_len argument is not a valid length for the address
family.
EISCONN
The socket is already connected.
ELOOP
More than {SYMLOOP_MAX} symbolic links were encountered during resolution
of the pathname in address.
ENAMETOOLONG
Pathname resolution of a symbolic link produced an intermediate result
whose length exceeds {PATH_MAX}.
ENOBUFS
Insufficient resources were available to complete the call.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
An application program can retrieve the assigned socket name with
the getsockname() function.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
connect() , getsockname() , listen() , socket()
, the Base Definitions volume of
IEEE Std 1003.1-2001, <sys/socket.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
