lfs_core/
disk.rs

1use {
2    super::*,
3    lazy_regex::*,
4};
5
6/// what we have most looking like a physical device
7#[derive(Debug, Clone)]
8pub struct Disk {
9    /// a name, like "sda", "sdc", "nvme0n1", etc.
10    pub name: String,
11
12    /// true for HDD, false for SSD, None for unknown.
13    /// This information isn't reliable for USB devices
14    pub rotational: Option<bool>,
15
16    /// whether the system thinks the media is removable.
17    /// Seems reliable when not mapped
18    pub removable: Option<bool>,
19
20    /// whether it's a RAM disk
21    pub ram: bool,
22
23    /// whether it's on LVM
24    pub lvm: bool,
25
26    /// whether it's a crypted disk
27    pub crypted: bool,
28}
29
30impl Disk {
31    pub fn new(name: String) -> Self {
32        let rotational = sys::read_file_as_bool(&format!("/sys/block/{}/queue/rotational", name));
33        let removable = sys::read_file_as_bool(&format!("/sys/block/{}/removable", name));
34        let ram = regex_is_match!(r#"^zram\d*$"#, &name);
35        let dm_uuid = sys::read_file(&format!("/sys/block/{}/dm/uuid", name)).ok();
36        let crypted = dm_uuid
37            .as_ref()
38            .map_or(false, |uuid| uuid.starts_with("CRYPT-"));
39        let lvm = dm_uuid.map_or(false, |uuid| uuid.starts_with("LVM-"));
40        Self {
41            name,
42            rotational,
43            removable,
44            ram,
45            lvm,
46            crypted,
47        }
48    }
49    /// a synthetic code trying to express the essence of the type of media,
50    /// an empty str being returned when information couldn't be gathered.
51    /// This code is for humans and may change in future minor versions.
52    pub fn disk_type(&self) -> &'static str {
53        if self.ram {
54            "RAM"
55        } else if self.crypted {
56            "crypt"
57        } else if self.lvm {
58            "LVM"
59        } else {
60            match (self.removable, self.rotational) {
61                (Some(true), _) => "remov",
62                (Some(false), Some(true)) => "HDD",
63                (Some(false), Some(false)) => "SSD",
64                _ => "",
65            }
66        }
67    }
68}
lfs_core/disk.rs

lfs_core/
disk.rs
