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() 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 .