Function nc::ftruncate

pub fn ftruncate(fd: i32, length: off_t) -> Result<(), Errno>

Truncate an opened file to a specified length.

let path = "/tmp/nc-ftruncate";
let ret = nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644);
assert!(ret.is_ok());
let fd = ret.unwrap();
let ret = nc::ftruncate(fd, 64 * 1024);
assert!(ret.is_ok());
assert!(nc::close(fd).is_ok());
assert!(nc::unlinkat(nc::AT_FDCWD, path, 0).is_ok());