Struct SendFile

pub struct SendFile {
    pub file: RawFd,
    pub count: usize,
    pub offset: off_t,
}

Abstraction for interacting with Linux’s zero-copy I/O sendfile syscall.

let mut sendfile = SendFile::new(source, count)?;

loop {
    match sendfile.send(dest)? {
        0 => return Ok(()),
        _ => ()
    }
}

Fields

file: RawFd

count: usize

offset: off_t

Implementations

impl SendFile

pub fn new<F: AsRawFd>(file: &mut F, count: usize) -> Result<Self>

Set a file to be used as the sendfile source.

pub fn count(self, count: usize) -> Self

Set the number of bytes to write per call.

pub fn offset(self, offset: off_t) -> Self

Set the offset to begin copying bytes from.

pub fn send<F: AsRawFd>(&mut self, to: &mut F) -> Result<u64>

Begin copying from the the sendfile to the destination file.

• This will write up to self.count amount of bytes at a time.
• The self.offset value is updated by the syscall on return.