blob: 77c676c8111c75af90785f02fde5a49ec2158c8e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
use rand::RngCore;
use std::fs::File;
use std::io::Write;
const BUFSIZ: usize = 4096;
pub fn junk(f: &mut File, n: u64) -> Result<(), std::io::Error> {
let mut remain = n;
while remain >= BUFSIZ as u64 {
write_junk(f, BUFSIZ)?;
remain -= BUFSIZ as u64;
}
write_junk(f, remain as usize)?;
Ok(())
}
fn write_junk(f: &mut File, n: usize) -> Result<(), std::io::Error> {
let mut bytes = [0u8; BUFSIZ];
rand::thread_rng().fill_bytes(&mut bytes);
f.write_all(&bytes[..n])?;
Ok(())
}
|