Hello
Can sendfile() linux syscall be used to send part of file from one mmaped file to other mmaped file?
Hello
Can sendfile() linux syscall be used to send part of file from one mmaped file to other mmaped file?
From sendfile(2)
:
Presently (Linux 2.6.9): in_fd, must correspond to a file which supports mmap()-like operations (i.e., it cannot be a socket); and out_fd must refer to a socket.
So it looks like the answer is no.
I think I understand what you are looking for now. Check out splice(2)
.