using System.Runtime.Versioning;
namespace NewLife;
/// <summary>机器信息 Linux 部分</summary>
public partial class MachineInfo
{
#if NET5_0_OR_GREATER
[SupportedOSPlatform("linux")]
#endif
private void LoadLinuxInfo()
{
var str = GetLinuxName();
if (!str.IsNullOrEmpty()) OSName = str;
var device = ReadDeviceInfo();
if (device.TryGetValue("Platform", out str))
OSName = str;
if (device.TryGetValue("Version", out str))
OSVersion = str;
// 树莓派的Hardware无法区分P0/P4
var dic = ReadInfo("/proc/cpuinfo");
if (dic != null)
{
if (dic.TryGetValue("Hardware", out str) ||
dic.TryGetValue("cpu model", out str) ||
dic.TryGetValue("model name", out str))
Processor = str?.TrimPrefix("vendor ");
if (device.TryGetValue("Product", out str))
Product = str;
else if (dic.TryGetValue("Model", out str))
Product = str;
if (dic.TryGetValue("vendor_id", out str))
Vendor = str;
//if (device.TryGetValue("Fingerprint", out str) && !str.IsNullOrEmpty())
// CpuID = str;
if (dic.TryGetValue("Serial", out str) && !str.IsNullOrEmpty() && !str.Trim('0').IsNullOrEmpty())
UUID = str;
}
var mid = "/etc/machine-id";
if (!File.Exists(mid)) mid = "/var/lib/dbus/machine-id";
if (TryRead(mid, out var value))
Guid = value;
else if (device.TryGetValue("android_id", out str) && !str.IsNullOrEmpty() && str != "unknown")
Guid = str;
//else if (android.TryGetValue("Id", out str))
// Guid = str;
// DMI信息位于 /sys/class/dmi/id/ 目录，可以直接读取，不需要执行dmidecode命令
var uuid = "";
var file = "/sys/class/dmi/id/product_uuid";
if (!File.Exists(file)) file = "/etc/uuid";
if (!File.Exists(file)) file = "/proc/serial_num"; // miui12支持/proc/serial_num
if (TryRead(file, out value))
uuid = value;
else if (device.TryGetValue("Serial", out str) && str != "unknown")
uuid = str;
if (!uuid.IsNullOrEmpty()) UUID = uuid;
// 从release文件读取产品
var prd = GetProductByRelease();
if (!prd.IsNullOrEmpty()) Product = prd;
if (prd.IsNullOrEmpty() && TryRead("/sys/class/dmi/id/product_name", out var product_name))
{
Product = product_name;
// 增加制造商。如 Tencent Cloud，它的产品名只有 CVM。阿里云产品名 Alibaba Cloud ECS
if (TryRead("/sys/class/dmi/id/sys_vendor", out var vendor) && !vendor.IsNullOrEmpty())
{
Vendor = vendor;
if (!product_name.IsNullOrEmpty() && !product_name.Contains(vendor))
{
// 红帽KVM太流行，细化处理
if (product_name == "KVM" && vendor == "Red Hat" &&
TryRead("/sys/class/dmi/id/product_version", out var ver) && !ver.IsNullOrEmpty())
{
var p = ver.IndexOf('(');
if (p > 0) ver = ver[..p].Trim();
Product = ver;
}
}
}
}
file = "/sys/class/dmi/id/product_serial";
if (TryRead(file, out value)) Serial = value;
// 在DMI信息内，没有太好的BoardID取值
file = "/sys/class/dmi/id/product_sku";
if (TryRead(file, out value) && !value.IsNullOrEmpty())
Board = value;
else
{
file = "/sys/class/dmi/id/product_family";
if (TryRead(file, out value)) Board = value;
}
// 在虚拟机中，uuid可能出现一个时间id和一个guid。
var disks = GetFiles("/dev/disk/by-uuid", false);
if (disks.Count > 0)
{
// 去掉时间id例如 2025-08-14-18-36-42-00，因为它随着时间在改变
disks = disks.Where(e => !e.IsNullOrEmpty() && (e.Length < 10 || e[4] != '-' || e[..10].ToDateTime().Year < 2000)).ToList();
}
if (disks.Count == 0)
{
// id中需要剔除QEMU，去掉virtio-前缀，例如 virtio-uf6ag3b49w6v4e9ldgcj
disks = GetFiles("/dev/disk/by-id", true);
disks = disks.Where(e => !e.IsNullOrEmpty() && !e.Contains("QEMU_")).Select(e => e.TrimPrefix("virtio-")).ToList();
}
if (disks.Count == 0) disks = GetFiles("/dev/disk/by-partuuid", true);
if (disks.Count > 0) DiskID = disks.Where(e => !e.IsNullOrEmpty()).Join(",");
// 从*-release文件读取产品信息，具有更高优先级
file = "/etc/os-release";
if (TryRead(file, out value))
{
var dic2 = value.SplitAsDictionary("=", Environment.NewLine, true);
if (dic2.TryGetValue("Vendor", out str)) Vendor = str;
if (dic2.TryGetValue("Product", out str)) Product = str;
if (dic2.TryGetValue("Serial", out str)) Serial = str;
if (dic2.TryGetValue("Board", out str)) Board = str;
}
}
private void RefreshLinux()
{
var dic = ReadInfo("/proc/meminfo");
if (dic != null)
{
if (dic.TryGetValue("MemTotal", out var str) && !str.IsNullOrEmpty())
Memory = (UInt64)str.TrimSuffix(" kB").ToInt() * 1024;
// MemAvailable是系统内核预测的可用内存，过低则认为不能安全分配给新进程，可能过于悲观；
// MemFree是完全空闲的内存，未被使用的物理内存页，但内核不敢用；
static UInt64 GetMem(IDictionary<String, String?> mem, String key)
{
return mem.TryGetValue(key, out var v) && !v.IsNullOrEmpty() ? (UInt64)v.TrimSuffix(" kB").ToInt() * 1024 : 0;
}
var ma = GetMem(dic, "MemAvailable");
var mf = GetMem(dic, "MemFree");
var buffers = GetMem(dic, "Buffers");
var cached = GetMem(dic, "Cached");
var srecl = GetMem(dic, "SReclaimable");
var shmem = GetMem(dic, "Shmem");
AvailableMemory = ma;
// FreeMemory采用 free 命令的宽松口径：free + buffers + cache + SReclaimable - Shmem
var cache = cached + srecl;
if (cache > shmem) cache -= shmem;
FreeMemory = mf + buffers + cache;
}
// A2/A4温度获取，Buildroot，CPU温度和主板温度
if (TryRead("/sys/class/thermal/thermal_zone0/temp", out var value) ||
TryRead("/sys/class/thermal/thermal_zone1/temp", out value))
{
Temperature = value.ToDouble();
// 有时候温度会超过1000，可能是毫度。机器温度不会低于0度
if (Temperature > 1000) Temperature /= 1000;
}
// respberrypi + fedora
else if (TryRead("/sys/class/thermal/thermal_zone0/temp", out value) ||
TryRead("/sys/class/hwmon/hwmon0/temp1_input", out value) ||
TryRead("/sys/class/hwmon/hwmon0/temp2_input", out value) ||
TryRead("/sys/class/hwmon/hwmon0/device/hwmon/hwmon0/temp2_input", out value) ||
TryRead("/sys/devices/virtual/thermal/thermal_zone0/temp", out value))
{
Temperature = value.ToDouble() / 1000;
}
// A2温度获取，Ubuntu 16.04 LTS， Linux 3.4.39
else if (TryRead("/sys/class/hwmon/hwmon0/device/temp_value", out value))
{
if (!value.IsNullOrEmpty()) Temperature = value.Substring(null, ":").ToDouble();
}
// 电池剩余
if (TryRead("/sys/class/power_supply/BAT0/energy_now", out var energy_now) &&
TryRead("/sys/class/power_supply/BAT0/energy_full", out var energy_full))
{
Battery = energy_now.ToDouble() / energy_full.ToDouble();
}
else if (TryRead("/sys/class/power_supply/battery/capacity", out var capacity))
{
Battery = capacity.ToDouble() / 100.0;
}
else if (Runtime.Mono)
{
var battery = ReadDeviceBattery();
if (battery.TryGetValue("ChargeLevel", out var obj)) Battery = obj.ToDouble();
}
var file = "/proc/stat";
if (!_excludes.Contains(nameof(CpuRate)) && File.Exists(file))
{
// CPU指标：user，nice, system, idle, iowait, irq, softirq
// cpu 57057 0 14420 1554816 0 443 0 0 0 0
try
{
using var reader = new StreamReader(file);
var line = reader.ReadLine();
if (!line.IsNullOrEmpty() && line.StartsWith("cpu"))
{
var vs = line.TrimPrefix("cpu").Trim().Split(' ');
var current = new SystemTime
{
IdleTime = vs[3].ToLong(),
TotalTime = vs.Take(7).Select(e => e.ToLong()).Sum().ToLong(),
};
var idle = current.IdleTime - (_systemTime?.IdleTime ?? 0);
var total = current.TotalTime - (_systemTime?.TotalTime ?? 0);
_systemTime = current;
CpuRate = total == 0 ? 0 : Math.Round((Double)(total - idle) / total, 4);
}
}
catch
{
_excludes.Add(nameof(CpuRate));
}
}
}
#region Linux辅助
/// <summary>获取Linux发行版名称</summary>
/// <returns>Linux发行版名称</returns>
public static String? GetLinuxName()
{
var fr = "/etc/redhat-release";
if (TryRead(fr, out var value)) return value;
var dr = "/etc/debian-release";
if (TryRead(dr, out value)) return value;
var sr = "/etc/os-release";
if (TryRead(sr, out value))
{
var dic = value.SplitAsDictionary("=", "\n", true);
if (dic.TryGetValue("PRETTY_NAME", out var pretty) && !pretty.IsNullOrEmpty()) return pretty.Trim();
if (dic.TryGetValue("NAME", out var name) && !name.IsNullOrEmpty()) return name.Trim();
}
var uname = "uname".Execute("-sr", 0, false)?.Trim();
if (!uname.IsNullOrEmpty())
{
// 支持Android系统名
var ss = uname.Split('-');
foreach (var item in ss)
{
if (!item.IsNullOrEmpty() && item.StartsWithIgnoreCase("Android")) return item;
}
return uname;
}
return null;
}
private static String? GetProductByRelease()
{
var di = "/etc/".AsDirectory();
if (!di.Exists) return null;
foreach (var fi in di.GetFiles("*-release"))
{
if (!fi.Name.EqualIgnoreCase("redhat-release", "debian-release", "os-release", "system-release"))
{
var dic = File.ReadAllText(fi.FullName).SplitAsDictionary("=", "\n", true);
if (dic.TryGetValue("BOARD", out var str)) return str;
if (dic.TryGetValue("BOARD_NAME", out str)) return str;
}
}
return null;
}
#endregion
}
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