Copyright (c) 1983 The Regents of the University of California.
All rights reserved.

Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

@(#)bind.2 6.7 (Berkeley) 02/14/89

C 5 bind - bind a name to a socket

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

bind(s, name, namelen)
int s;
struct sockaddr *name;
int namelen;

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 name be assigned to the socket. 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 section 4 for detailed information.

If the bind is successful, a 0 value is returned. A return value of -1 indicates an error, which is further specified in the global errno. The bind call will fail if:

20 [EBADF] S is not a valid descriptor.

20 [ENOTSOCK] S is not a socket.

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

20 [EADDRINUSE] The specified address is already in use.

20 [EINVAL] The socket is already bound to an address.

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

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

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

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

15 [EINVAL] The pathname contains a character with the high-order bit set.

15 [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.

15 [ENOENT] A prefix component of the path name does not exist.

15 [ELOOP] Too many symbolic links were encountered in translating the pathname.

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

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

15 [EISDIR] A null pathname was specified.

connect(2), listen(2), socket(2), getsockname(2)