sockfd_lookup (9) - Linux Man Pages
sockfd_lookup: Go from a file number to its socket slot
sockfd_lookup - Go from a file number to its socket slot
struct socket * sockfd_lookup(int
fd, int *err);
- file handle
- pointer to an error code return
The file handle passed in is locked and the socket it is bound too is returned. If an error occurs the err pointer is overwritten with a negative errno code and NULL is returned. The function checks for both invalid handles and passing a handle which is not a socket.