readahead_file/
readahead_file.rs

1use coreshift_core::fs::readahead;
2use std::fs::File;
3use std::io::{Error, ErrorKind};
4
5fn main() -> Result<(), Box<dyn std::error::Error>> {
6    let path = std::env::args()
7        .nth(1)
8        .ok_or_else(|| Error::new(ErrorKind::InvalidInput, "usage: readahead_file <path>"))?;
9    let file = File::open(&path)?;
10    let len = file.metadata()?.len().min(128 * 1024) as usize;
11
12    readahead(file, 0, len)?;
13    println!("Requested readahead for {} bytes from {}", len, path);
14
15    Ok(())
16}

readahead_file/readahead_file.rs

readahead_file/
readahead_file.rs