1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
// 
// Sysinfo
// 
// Copyright (c) 2017 Guillaume Gomez
//

use ::DiskExt;
use ::utils;
use super::system::get_all_data;

use libc::statvfs;
use std::mem;
use std::fmt::{Debug, Error, Formatter};
use std::path::{Path, PathBuf};
use std::ffi::{OsStr, OsString};
use std::os::unix::ffi::OsStrExt;

/// Enum containing the different handled disks types.
#[derive(Debug, PartialEq, Clone, Copy)]
pub enum DiskType {
    /// HDD type.
    HDD,
    /// SSD type.
    SSD,
    /// Unknown type.
    Unknown(isize),
}

impl From<isize> for DiskType {
    fn from(t: isize) -> DiskType {
        match t {
            0 => DiskType::SSD,
            1 => DiskType::HDD,
            id => DiskType::Unknown(id),
        }
    }
}

fn find_type_for_name(name: &OsStr) -> DiskType {
    #![allow(or_fun_call)]
    /* turn "sda1" into "sda": */
    let mut trimmed: &[u8] = name.as_bytes();
    while trimmed.len() > 1 && trimmed[trimmed.len()-1] >= b'0' && trimmed[trimmed.len()-1] <= b'9' {
        trimmed = &trimmed[..trimmed.len()-1]
    }
    let trimmed: &OsStr = OsStrExt::from_bytes(trimmed);

    let path = Path::new("/sys/block/").to_owned()
        .join(trimmed)
        .join("queue/rotational");
    let rotational_int = get_all_data(path).unwrap_or(String::new()).trim().parse();
    DiskType::from(rotational_int.unwrap_or(-1))
}

#[cfg(target_arch = "arm")]
macro_rules! cast {
    ($x:expr) => { $x as u64 }
}

#[cfg(not(target_arch = "arm"))]
macro_rules! cast {
    ($x:expr) => { $x }
}

pub fn new(name: &OsStr, mount_point: &Path, file_system: &[u8]) -> Disk {
    let mount_point_cpath = utils::to_cpath(mount_point);
    let type_ = find_type_for_name(name);
    let mut total_space = 0;
    let mut available_space = 0;
    unsafe {
        let mut stat: statvfs = mem::zeroed();
        if statvfs(mount_point_cpath.as_ptr() as *const _, &mut stat) == 0 {
            total_space = stat.f_bsize * stat.f_blocks;
            available_space = stat.f_bsize * stat.f_bavail;
        }
    }
    Disk {
        type_: type_,
        name: name.to_owned(),
        file_system: file_system.to_owned(),
        mount_point: mount_point.to_owned(),
        total_space: cast!(total_space),
        available_space: cast!(available_space),
    }
}

/// Struct containing a disk information.
pub struct Disk {
    type_: DiskType,
    name: OsString,
    file_system: Vec<u8>,
    mount_point: PathBuf,
    total_space: u64,
    available_space: u64,
}

impl Debug for Disk {
    fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error> {
        write!(fmt,
               "Disk({:?})[FS: {:?}][Type: {:?}] mounted on {:?}: {}/{} B",
               self.get_name(), self.get_file_system(), self.get_type(), self.get_mount_point(),
               self.get_available_space(), self.get_total_space())
    }
}

impl DiskExt for Disk {
    fn get_type(&self) -> DiskType {
        self.type_
    }

    fn get_name(&self) -> &OsStr {
        &self.name
    }

    fn get_file_system(&self) -> &[u8] {
        &self.file_system
    }

    fn get_mount_point(&self) -> &Path {
        &self.mount_point
    }

    fn get_total_space(&self) -> u64 {
        self.total_space
    }

    fn get_available_space(&self) -> u64 {
        self.available_space
    }

    fn update(&mut self) -> bool {
        unsafe {
            let mut stat: statvfs = mem::zeroed();
            let mount_point_cpath = utils::to_cpath(&self.mount_point);
            if statvfs(mount_point_cpath.as_ptr() as *const _, &mut stat) == 0 {
                let tmp = stat.f_bsize * stat.f_bavail;
                self.available_space = cast!(tmp);
                true
            } else {
                false
            }
        }
    }
}