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 the name pointed to by name be assigned to the socket.

bind() returns:

0

on success.

-1

on failure and sets errno to indicate the error.

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.

EBADF

s is not a valid descriptor.

EFAULT

The name parameter is not in a valid part of the user address space.

EINVAL

namelen is not the size of a valid address for the specified address family. The socket is already bound to an address.

ENOTSOCK

s is a descriptor for a file, not a socket.

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

EACCES

Search permission is denied for a component of the path prefix of the path name in name.

EIO

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

EISDIR

A null path name was specified.

ELOOP

Too many symbolic links were encountered in translating the path name in name.

ENAMETOOLONG

The length of the path argument exceeds {PATH_MAX}. A pathname component is longer than {NAME_MAX} (see sysconf(2V)) while {_POSIX_NO_TRUNC} is in effect (see pathconf(2V)).

ENOENT

A component of the path prefix of the path name in name does not exist.

ENOTDIR

A component of the path prefix of the path name in name is not a directory.

EROFS

The inode would reside on a read-only file system.

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(2V),

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