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BIND(2)                     BSD System Calls Manual                    BIND(2)

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
     Bind() assigns a name to an unnamed socket.  When a socket is created with socket(2) it exists in a
     name space (address family) but has no name assigned.  Bind() requests that address be assigned to the
     socket.

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 unlink(2)).

     The rules used in name binding vary between communication domains.  Consult the manual entries in sec-tion section
     tion 4 for detailed information.

RETURN VALUES
     Upon successful completion, a value of 0 is returned.  Otherwise, a value of -1 is returned and the
     global integer variable errno is set to indicate the error.

ERRORS
     The bind() system call will fail if:

     [EACCES]           The requested address is protected, and the current user has inadequate permission
                        to access it.

     [EADDRINUSE]       The specified address is already in use.

     [EADDRNOTAVAIL]    The specified address is not available from the local machine.

     [EAFNOSUPPORT]     address is not valid for the address family of socket.

     [EBADF]            socket is not a valid file descriptor.

     [EDESTADDRREQ]     socket is a null pointer.

     [EFAULT]           The address parameter is not in a valid part of the user address space.

     [EINVAL]           socket is already bound to an address and the protocol does not support binding to a
                        new address.  Alternatively, socket may have been shut down.

     [ENOTSOCK]         socket does not refer to a socket.

     [EOPNOTSUPP]       socket is not of a type that can be bound to an address.

     The following errors are specific to binding names in the UNIX domain.

     [EACCES]           A component of the path prefix does not allow searching or the node's parent direc-tory directory
                        tory denies write permission.

     [EIO]              An I/O error occurred while making the directory entry or allocating the inode.

     [EISDIR]           An empty pathname was specified.

     [ELOOP]            Too many symbolic links were encountered in translating the pathname.  This is taken
                        to be indicative of a looping symbolic link.

     [ENAMETOOLONG]     A component of a pathname exceeded {NAME_MAX} characters, or an entire path name
                        exceeded {PATH_MAX} characters.

     [ENOENT]           A component of the path name does not refer to an existing file.

     [ENOTDIR]          A component of the path prefix is not a directory.

     [EROFS]            The name would reside on a read-only file system.

LEGACY SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>

     The include file <sys/types.h> is necessary.

SEE ALSO
     connect(2), getsockname(2), listen(2), socket(2), compat(5)

HISTORY
     The bind() function call appeared in 4.2BSD.

4.2 Berkeley Distribution        June 4, 1993        4.2 Berkeley Distribution

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