is_owned/
is_owned.rs

1/// Checks whether a devices is in use by either a set of partitions or a partition
2/// type indicated by the superblock.
3use std::{
4    env,
5    error::Error,
6    fmt::{self, Display},
7    path::Path,
8};
9
10use libblkid_rs::BlkidProbe;
11
12#[derive(Debug)]
13struct ExampleError(String);
14
15impl ExampleError {
16    fn new<D>(d: D) -> Self
17    where
18        D: Display,
19    {
20        ExampleError(d.to_string())
21    }
22}
23
24impl Display for ExampleError {
25    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
26        write!(f, "{}", self.0)
27    }
28}
29
30impl Error for ExampleError {}
31
32fn main() -> Result<(), Box<dyn Error>> {
33    let path = env::args()
34        .nth(1)
35        .ok_or_else(|| ExampleError::new("Path of device to check required as argument"))?;
36
37    let mut probe = BlkidProbe::new_from_filename(Path::new(&path))?;
38    probe.enable_superblocks(true)?;
39    probe.enable_partitions(true)?;
40    probe.do_safeprobe()?;
41
42    let partitions = probe
43        .get_partitions()
44        .and_then(|mut list| list.number_of_partitions());
45    let detected_use = probe.lookup_value("TYPE");
46
47    if partitions.as_ref().map(|num| *num > 0).unwrap_or(false) || detected_use.is_ok() {
48        println!("In use");
49        if let Ok(num) = partitions {
50            println!("{num} partitions found on block device");
51        }
52        if let Ok(ty) = detected_use {
53            println!("Device determined to be of type {ty}");
54        }
55    } else {
56        println!("Free");
57    }
58
59    Ok(())
60}
is_owned/is_owned.rs

is_owned/
is_owned.rs
