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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 differ (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  appro-
       priate 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 vol-
       ume 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 .

IEEE/The Open Group                  2003                             BIND(3P)