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BIND(3P)                   POSIX Programmer's Manual                  BIND(3P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       bind - bind a name to a socket

SYNOPSIS
       #include <sys/socket.h>

       int bind(int socket, const struct sockaddr *address,
              socklen_t address_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()  func-
       tion.

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, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  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 .



IEEE/The Open Group                  2003                             BIND(3P)