man bindat (2): assign a local protocol address to a socket

LIBRARY

Lb libc

In sys/types.h In sys/socket.h

In fcntl.h Ft int Fn bindat int fd int s const struct sockaddr *addr socklen_t addrlen

The Fn bindat system call assigns the local protocol address to a socket. It works just like the bind(2) system call with two exceptions:

It is limited to sockets in the PF_LOCAL domain.
If the file path stored in the Fa sun_path field of the sockaddr_un structure is a relative path, it is located relative to the directory associated with the file descriptor Fa fd . If Fn bindat is passed the special value AT_FDCWD in the Fa fd parameter, the current working directory is used and the behavior is identical to a call to bind(2).

Rv -std bindat

The Fn bindat system call may fail with the same errors as the bind(2) system call for a UNIX domain socket or with the following errors:

Bq Er EBADF: The Fa sun_path field does not specify an absolute path and the Fa fd argument is neither AT_FDCWD nor a valid file descriptor.
Bq Er ENOTDIR: The Fa sun_path field is not an absolute path and Fa fd is neither AT_FDCWD nor a file descriptor associated with a directory.

The was developed by An Pawel Jakub Dawidek Aq [email protected] under sponsorship from the FreeBSD Foundation.