BIND(2)

NAME
bind - bind a name to a socket

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

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

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 name 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 section 4 for detailed information.

RETURN VALUES
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.

ERRORS
The bind call will fail if:

    EBADF
        S is not a valid descriptor.

    ENOTSOCK
        S is not a socket.

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

    EADDRINUSE
        The specified address is already in use.

    EINVAL
        The socket is already bound to an address.

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

    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.

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

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

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

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

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

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

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

    EISDIR
        An empty pathname was specified.

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

HISTORY
The bind function call appeared in 4.2BSD. The first appearance in GNO was in v2.0.5.