22 lines
702 B
Rust
22 lines
702 B
Rust
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use tokio::fs;
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use tokio::io::{AsyncReadExt, AsyncWriteExt, Result};
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/// Checks if a block device is uninitialized.
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/// It assumed that a initialized device always has a non-zero byte in the first 8kiB.
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pub async fn is_uninitialized(dev_path: &str) -> Result<bool> {
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let mut dev = fs::File::open(dev_path).await?;
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let mut buf = [0u8; 8 << 10];
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dev.read_exact(&mut buf).await?;
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Ok(buf.into_iter().all(|b| b == 0))
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}
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/// zeroes the first 8kiB of the device so it looks uninitialized again.
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pub async fn uninitialize(dev_path: &str) -> Result<()> {
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let mut dev = fs::File::options().write(true).open(dev_path).await?;
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let buf = [0u8; 8 << 10];
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dev.write_all(&buf).await
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}
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