Function nc::call::pwrite64

pub unsafe fn pwrite64(
    fd: i32,
    buf: usize,
    count: size_t,
    offset: off_t
) -> Result<ssize_t, Errno>

Write to a file descriptor without changing file offset.

Example

let path = "/tmp/nc-pwrite64";
let ret = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644) };
assert!(ret.is_ok());
let fd = ret.unwrap();
let buf = "Hello, Rust";
let ret = unsafe { nc::pwrite64(fd, buf.as_ptr() as usize, buf.len(), 0) };
assert!(ret.is_ok());
assert_eq!(ret, Ok(buf.len() as nc::ssize_t));
let ret = unsafe { nc::close(fd) };
assert!(ret.is_ok());
let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, path, 0) };
assert!(ret.is_ok());