Function nc::call::fadvise64_64

pub unsafe fn fadvise64_64(
    fd: i32,
    offset: loff_t,
    len: loff_t,
    advice: i32
) -> Result<(), Errno>

Predeclare an access pattern for file data.

Example

let path = "/etc/passwd";
let ret = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_RDONLY, 0) };
assert!(ret.is_ok());
let fd = ret.unwrap();
let offset = 0;
let len = 4 * 1024;
let ret = unsafe { nc::fadvise64_64(fd, offset, len, nc::POSIX_FADV_NORMAL) };
assert!(ret.is_ok());
let ret = unsafe { nc::close(fd) };
assert!(ret.is_ok());