Revision control
Copy as Markdown
Other Tools
use std::io::BufRead;
use super::ProcResult;
use std::str::FromStr;
#[cfg(feature = "serde1")]
use serde::{Deserialize, Serialize};
/// A partition entry under `/proc/partitions`
#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
#[allow(non_snake_case)]
pub struct PartitionEntry {
/// Device major number
pub major: u16,
/// Device minor number
pub minor: u16,
/// Number of 1024 byte blocks
pub blocks: u64,
/// Device name
pub name: String
}
impl super::FromBufRead for Vec<PartitionEntry> {
fn from_buf_read<R: BufRead>(r: R) -> ProcResult<Self> {
let mut vec = Vec::new();
for line in r.lines().skip(2) {
let line = expect!(line);
let mut s = line.split_whitespace();
let major = expect!(u16::from_str(expect!(s.next())));
let minor = expect!(u16::from_str(expect!(s.next())));
let blocks = expect!(u64::from_str(expect!(s.next())));
let name = expect!(s.next()).to_string();
let partition_entry = PartitionEntry {
major,
minor,
blocks,
name
};
vec.push(partition_entry);
}
Ok(vec)
}
}
#[test]
fn test_partitions() {
use crate::FromBufRead;
use std::io::Cursor;
let s = "major minor #blocks name
259 0 1000204632 nvme0n1
259 1 1048576 nvme0n1p1
259 2 1048576 nvme0n1p2
259 3 104857600 nvme0n1p3
259 4 893248512 nvme0n1p4
253 0 104841216 dm-0
252 0 8388608 zram0
253 1 893232128 dm-1
8 0 3953664 sda
8 1 2097152 sda1
8 2 1855488 sda2
253 2 1853440 dm-2
";
let cursor = Cursor::new(s);
let partitions = Vec::<PartitionEntry>::from_buf_read(cursor).unwrap();
assert_eq!(partitions.len(), 12);
assert_eq!(partitions[3].major, 259);
assert_eq!(partitions[3].minor, 3);
assert_eq!(partitions[3].blocks, 104857600);
assert_eq!(partitions[3].name, "nvme0n1p3");
assert_eq!(partitions[11].major, 253);
assert_eq!(partitions[11].minor, 2);
assert_eq!(partitions[11].blocks, 1853440);
assert_eq!(partitions[11].name, "dm-2");
}