systemstat 0.2.5

Get system information/statistics in a cross-platform way
Documentation 
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210

// You are likely to be eaten by a grue.

use std::{io, path, ptr, mem, ffi, slice, time};
use std::os::unix::ffi::OsStrExt;
use libc::{c_void, c_int, size_t, sysctl, sysctlnametomib, timeval, statfs};
use crate::data::*;
use super::common::*;
use super::unix;
use super::bsd;

pub struct PlatformImpl;

macro_rules! sysctl_mib {
    ($len:expr, $name:expr) => {
        {
            let mut mib: [c_int; $len] = [0; $len];
            let mut sz: size_t = mib.len();
            let s = ffi::CString::new($name).unwrap();
            unsafe { sysctlnametomib(s.as_ptr(), &mut mib[0], &mut sz) };
            mib
        }
    }
}

macro_rules! sysctl {
    ($mib:expr, $dataptr:expr, $size:expr, $shouldcheck:expr) => {
        {
            let mib = &$mib;
            let mut size = $size;
            if unsafe { sysctl(&mib[0], mib.len() as u32,
                               $dataptr as *mut _ as *mut c_void, &mut size, ptr::null(), 0) } != 0 && $shouldcheck {
                return Err(io::Error::new(io::ErrorKind::Other, "sysctl() failed"))
            }
            size
        }
    };
    ($mib:expr, $dataptr:expr, $size:expr) => {
        sysctl!($mib, $dataptr, $size, true)
    }
}

lazy_static! {
    static ref KERN_CP_TIMES: [c_int; 2] = sysctl_mib!(2, "kern.cp_times");
    static ref KERN_BOOTTIME: [c_int; 2] = sysctl_mib!(2, "kern.boottime");
    static ref V_ACTIVE_COUNT: [c_int; 4] = sysctl_mib!(4, "vm.stats.vm.v_active_count");
    static ref V_INACTIVE_COUNT: [c_int; 4] = sysctl_mib!(4, "vm.stats.vm.v_inactive_count");
    static ref V_WIRE_COUNT: [c_int; 4] = sysctl_mib!(4, "vm.stats.vm.v_wire_count");
    static ref V_CACHE_COUNT: [c_int; 4] = sysctl_mib!(4, "vm.stats.vm.v_cache_count");
    static ref V_FREE_COUNT: [c_int; 4] = sysctl_mib!(4, "vm.stats.vm.v_free_count");
    static ref ZFS_ARC_SIZE: [c_int; 5] = sysctl_mib!(5, "kstat.zfs.misc.arcstats.size");
    static ref BATTERY_LIFE: [c_int; 4] = sysctl_mib!(4, "hw.acpi.battery.life");
    static ref BATTERY_TIME: [c_int; 4] = sysctl_mib!(4, "hw.acpi.battery.time");
    static ref ACLINE: [c_int; 3] = sysctl_mib!(3, "hw.acpi.acline");
    static ref CPU0TEMP: [c_int; 4] = sysctl_mib!(4, "dev.cpu.0.temperature");

    static ref CP_TIMES_SIZE: usize = {
        let mut size: usize = 0;
        unsafe { sysctl(&KERN_CP_TIMES[0], KERN_CP_TIMES.len() as u32,
                        ptr::null_mut(), &mut size, ptr::null(), 0) };
        size
    };
}

/// An implementation of `Platform` for FreeBSD.
/// See `Platform` for documentation.
impl Platform for PlatformImpl {
    #[inline(always)]
    fn new() -> Self {
        PlatformImpl
    }

    fn cpu_load(&self) -> io::Result<DelayedMeasurement<Vec<CPULoad>>> {
        let loads = measure_cpu()?;
        Ok(DelayedMeasurement::new(
                Box::new(move || Ok(loads.iter()
                               .zip(measure_cpu()?.iter())
                               .map(|(prev, now)| (*now - prev).to_cpuload())
                               .collect::<Vec<_>>()))))
    }

    fn load_average(&self) -> io::Result<LoadAverage> {
        unix::load_average()
    }

    fn memory(&self) -> io::Result<Memory> {
        let mut active: usize = 0; sysctl!(V_ACTIVE_COUNT, &mut active, mem::size_of::<usize>());
        let mut inactive: usize = 0; sysctl!(V_INACTIVE_COUNT, &mut inactive, mem::size_of::<usize>());
        let mut wired: usize = 0; sysctl!(V_WIRE_COUNT, &mut wired, mem::size_of::<usize>());
        let mut cache: usize = 0; sysctl!(V_CACHE_COUNT, &mut cache, mem::size_of::<usize>(), false);
        let mut free: usize = 0; sysctl!(V_FREE_COUNT, &mut free, mem::size_of::<usize>());
        let arc = ByteSize::b(zfs_arc_size().unwrap_or(0));
        let pmem = PlatformMemory {
            active: ByteSize::kib((active as u64) << *bsd::PAGESHIFT),
            inactive: ByteSize::kib((inactive as u64) << *bsd::PAGESHIFT),
            wired: saturating_sub_bytes(ByteSize::kib((wired as u64) << *bsd::PAGESHIFT), arc),
            cache: ByteSize::kib((cache as u64) << *bsd::PAGESHIFT),
            zfs_arc: arc,
            free: ByteSize::kib((free as u64) << *bsd::PAGESHIFT),
        };
        Ok(Memory {
            total: pmem.active + pmem.inactive + pmem.wired + pmem.cache + arc + pmem.free,
            free: pmem.inactive + pmem.cache + arc + pmem.free,
            platform_memory: pmem,
        })
    }

    fn swap(&self) -> io::Result<Swap> {
        Err(io::Error::new(io::ErrorKind::Other, "Not supported"))
    }

    fn boot_time(&self) -> io::Result<OffsetDateTime> {
        let mut data: timeval = unsafe { mem::zeroed() };
        sysctl!(KERN_BOOTTIME, &mut data, mem::size_of::<timeval>());
        let ts = OffsetDateTime::from_unix_timestamp(data.tv_sec.into()).expect("unix timestamp should be within range") + Duration::from_nanos(data.tv_usec as u64);
        Ok(ts)
    }

    fn battery_life(&self) -> io::Result<BatteryLife> {
        let mut life: usize = 0; sysctl!(BATTERY_LIFE, &mut life, mem::size_of::<usize>());
        let mut time: i32 = 0; sysctl!(BATTERY_TIME, &mut time, mem::size_of::<i32>());
        Ok(BatteryLife {
            remaining_capacity: life as f32 / 100.0,
            remaining_time: time::Duration::from_secs(if time < 0 { 0 } else { time as u64 }),
        })
    }

    fn on_ac_power(&self) -> io::Result<bool> {
        let mut on: usize = 0; sysctl!(ACLINE, &mut on, mem::size_of::<usize>());
        Ok(on == 1)
    }

    fn mounts(&self) -> io::Result<Vec<Filesystem>> {
        let mut mptr: *mut statfs = ptr::null_mut();
        let len = unsafe { getmntinfo(&mut mptr, 1_i32) };
        if len < 1 {
            return Err(io::Error::new(io::ErrorKind::Other, "getmntinfo() failed"))
        }
        let mounts = unsafe { slice::from_raw_parts(mptr, len as usize) };
        Ok(mounts.iter().map(|m| statfs_to_fs(&m)).collect::<Vec<_>>())
    }

    fn mount_at<P: AsRef<path::Path>>(&self, path: P) -> io::Result<Filesystem> {
        let path = ffi::CString::new(path.as_ref().as_os_str().as_bytes())?;
        let mut sfs: statfs = unsafe { mem::zeroed() };
        if unsafe { statfs(path.as_ptr() as *const _, &mut sfs) } != 0 {
            return Err(io::Error::new(io::ErrorKind::Other, "statfs() failed"));
        }
        Ok(statfs_to_fs(&sfs))
    }

    fn block_device_statistics(&self) -> io::Result<BTreeMap<String, BlockDeviceStats>> {
        Err(io::Error::new(io::ErrorKind::Other, "Not supported"))
    }

    fn networks(&self) -> io::Result<BTreeMap<String, Network>> {
        unix::networks()
    }

    fn network_stats(&self, _interface: &str) -> io::Result<NetworkStats> {
        Err(io::Error::new(io::ErrorKind::Other, "Not supported"))
    }

    fn cpu_temp(&self) -> io::Result<f32> {
        let mut temp: i32 = 0; sysctl!(CPU0TEMP, &mut temp, mem::size_of::<i32>());
        // The sysctl interface supports more units, but both amdtemp and coretemp always
        // use IK (deciKelvin)
        Ok((temp as f32 - 2731.5) / 10.0)
    }

    fn socket_stats(&self) -> io::Result<SocketStats> {
        Err(io::Error::new(io::ErrorKind::Other, "Not supported"))
    }
}


fn measure_cpu() -> io::Result<Vec<CpuTime>> {
    let cpus = *CP_TIMES_SIZE / mem::size_of::<bsd::sysctl_cpu>();
    let mut data: Vec<bsd::sysctl_cpu> = Vec::with_capacity(cpus);
    unsafe { data.set_len(cpus) };

    sysctl!(KERN_CP_TIMES, &mut data[0], *CP_TIMES_SIZE);
    Ok(data.into_iter().map(|cpu| cpu.into()).collect())
}

fn zfs_arc_size() -> io::Result<u64> {
    let mut zfs_arc: usize = 0;
    sysctl!(ZFS_ARC_SIZE, &mut zfs_arc, mem::size_of::<usize>());
    Ok(zfs_arc as u64)
}

fn statfs_to_fs(fs: &statfs) -> Filesystem {
    Filesystem {
        files: (fs.f_files as usize).saturating_sub(fs.f_ffree as usize),
        files_total: fs.f_files as usize,
        files_avail: fs.f_ffree as usize,
        free: ByteSize::b(fs.f_bfree * fs.f_bsize),
        avail: ByteSize::b(fs.f_bavail as u64 * fs.f_bsize),
        total: ByteSize::b(fs.f_blocks * fs.f_bsize),
        name_max: fs.f_namemax as usize,
        fs_type: unsafe { ffi::CStr::from_ptr(&fs.f_fstypename[0]).to_string_lossy().into_owned() },
        fs_mounted_from: unsafe { ffi::CStr::from_ptr(&fs.f_mntfromname[0]).to_string_lossy().into_owned() },
        fs_mounted_on: unsafe { ffi::CStr::from_ptr(&fs.f_mntonname[0]).to_string_lossy().into_owned() },
    }
}

#[link(name = "c")]
extern "C" {
    #[link_name = "getmntinfo@FBSD_1.0"]
    fn getmntinfo(mntbufp: *mut *mut statfs, flags: c_int) -> c_int;
}