70 lines
1.7 KiB
Rust
70 lines
1.7 KiB
Rust
use anyhow::Result;
|
|
use std::fs::OpenOptions;
|
|
use std::io::{Read, Write};
|
|
use std::path::PathBuf;
|
|
|
|
use thinp::file_utils;
|
|
|
|
use crate::common::test_dir::TestDir;
|
|
|
|
//------------------------------------------
|
|
|
|
pub fn mk_zeroed_md(td: &mut TestDir) -> Result<PathBuf> {
|
|
let md = td.mk_path("meta.bin");
|
|
eprintln!("path = {:?}", md);
|
|
let _file = file_utils::create_sized_file(&md, 1024 * 1024 * 16);
|
|
Ok(md)
|
|
}
|
|
|
|
pub fn damage_superblock(path: &PathBuf) -> Result<()> {
|
|
let mut output = OpenOptions::new().read(false).write(true).open(path)?;
|
|
let buf = [0u8; 512];
|
|
output.write_all(&buf)?;
|
|
Ok(())
|
|
}
|
|
|
|
//------------------------------------------
|
|
|
|
pub fn md5(md: &PathBuf) -> Result<String> {
|
|
let output = duct::cmd!("md5sum", "-b", &md).stdout_capture().run()?;
|
|
let csum = std::str::from_utf8(&output.stdout[0..])?.to_string();
|
|
let csum = csum.split_ascii_whitespace().next().unwrap().to_string();
|
|
Ok(csum)
|
|
}
|
|
|
|
// This checksums the file before and after the thunk is run to
|
|
// ensure it is unchanged.
|
|
pub fn ensure_untouched<F>(p: &PathBuf, thunk: F) -> Result<()>
|
|
where
|
|
F: Fn() -> Result<()>,
|
|
{
|
|
let csum = md5(p)?;
|
|
thunk()?;
|
|
assert_eq!(csum, md5(p)?);
|
|
Ok(())
|
|
}
|
|
|
|
pub fn superblock_all_zeroes(path: &PathBuf) -> Result<bool> {
|
|
let mut input = OpenOptions::new().read(true).write(false).open(path)?;
|
|
let mut buf = vec![0; 4096];
|
|
input.read_exact(&mut buf[0..])?;
|
|
for b in buf {
|
|
if b != 0 {
|
|
return Ok(false);
|
|
}
|
|
}
|
|
|
|
Ok(true)
|
|
}
|
|
|
|
pub fn ensure_superblock_zeroed<F>(p: &PathBuf, thunk: F) -> Result<()>
|
|
where
|
|
F: Fn() -> Result<()>,
|
|
{
|
|
thunk()?;
|
|
assert!(superblock_all_zeroes(p)?);
|
|
Ok(())
|
|
}
|
|
|
|
//------------------------------------------
|