assign a local protocol address to a socket
Standard C Library (libc, -lc)
, const struct
() system call assigns the local
protocol address to a socket. When a socket is created with
it exists in an address family space
but has no protocol address assigned. The
() system call requests that
be assigned to the socket.
Binding an address 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
The rules used in address binding vary between communication domains. Consult
the manual entries in section 4 for detailed information.
For maximum portability, you should always zero the socket address structure
before populating it and passing it to
() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno
is set to indicate
() system call will fail if:
- Kernel resources to complete the request are temporarily unavailable.
- The s argument is not a valid
- 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.
- The addrlen argument is not a valid
length for the address family.
- The s argument is not a socket.
- The specified address is not available from the local machine.
- The specified address is already in use.
- Addresses in the specified address family cannot be used with this
- The requested address is protected, and the current user has inadequate
permission to access it.
- The addr argument is not in a valid part
of the user address space.
The following errors are specific to binding addresses in the UNIX domain.
- A component of the path prefix is not a directory.
- A component of a pathname exceeded 255 characters, or an entire path name
exceeded 1023 characters.
- A prefix component of the path name does not exist.
- Too many symbolic links were encountered in translating the pathname.
- An I/O error occurred while making the directory entry or allocating the
- The name would reside on a read-only file system.
- An empty pathname was specified.
() system call appeared in