fn create_dir_all_()

in reverie-process/src/fd.rs [393:425]

• 24 lines of code
• 4 McCabe index (conditional complexity)

fn create_dir_all_(path: &mut [libc::c_char], mode: libc::mode_t) -> Result<(), Errno> {
    if path.len() == 1 {
        return Ok(());
    }

    // Try creating this directory
    match Errno::result(unsafe { libc::mkdir(path.as_ptr(), mode) }) {
        Ok(_) => return Ok(()),
        Err(Errno::ENOENT) => {}
        Err(_) if is_dir(path.as_ptr()) => return Ok(()),
        Err(e) => return Err(e),
    }

    // If it doesn't exist, try creating the parent directory.
    with_parent(path, |parent| {
        match parent {
            Some(p) => create_dir_all_(p, mode),
            None => {
                // Got all the way to the root without successfully creating any
                // child directories. Most likely a permissions error.
                Err(Errno::EPERM)
            }
        }
    })?;

    // Finally, try creating the directory again after the parent directories
    // now exist.
    match Errno::result(unsafe { libc::mkdir(path.as_ptr(), mode) }) {
        Ok(_) => Ok(()),
        Err(_) if is_dir(path.as_ptr()) => Ok(()),
        Err(e) => Err(e),
    }
}