INNER CODE UNIT · Rust

expand_tempfs_file_bytes

openebs/mayastor · io-engine-tests/src/lib.rs:200

pub fn expand_tempfs_file_bytes(path: &str, size: u64) {
    let output = Command::new("truncate")
        .args(["-s", &format!("+{size}"), path])
        .output()
        .expect("failed exec truncate");
    assert!(output.status.success(), "{:#?}", output);
}

/// Automatically assign a loopdev to path
pub fn setup_loopdev_file(path: &str, sector_size: Option<u64>) -> String {
    let log_sec = sector_size.unwrap_or(512);

    let output = Command::new("losetup")
        .args(["-f", "--show", "-b", &format!("{log_sec}"), path])
        .output()
        .expect("failed exec losetup");
    assert!(output.status.success(), "{:#?}", output);
    // return the assigned loop device

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