Aaru/DiscImageChef.Interop/DetectOS.cs

// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : DetectOS.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Interop services.
//
// --[ Description ] ----------------------------------------------------------
//
//     Detects underlying operating system.
//
// --[ License ] --------------------------------------------------------------
//
//     Permission is hereby granted, free of charge, to any person obtaining a
//     copy of this software and associated documentation files (the
//     "Software"), to deal in the Software without restriction, including
//     without limitation the rights to use, copy, modify, merge, publish,
//     distribute, sublicense, and/or sell copies of the Software, and to
//     permit persons to whom the Software is furnished to do so, subject to
//     the following conditions:
//
//     The above copyright notice and this permission notice shall be included
//     in all copies or substantial portions of the Software.
//
//     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
//     OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
//     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
//     CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
//     TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
//     SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2018 Natalia Portillo
// ****************************************************************************/

using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;

namespace DiscImageChef.Interop
{
    public static class DetectOS
    {
        [DllImport("libc", SetLastError = true)]
        static extern int uname(out utsname name);

        [DllImport("libc", SetLastError = true, EntryPoint = "sysctlbyname", CharSet = CharSet.Ansi)]
        static extern int OSX_sysctlbyname(string name, IntPtr oldp, IntPtr oldlenp, IntPtr newp, uint newlen);

        /// <summary>
        ///     Gets the real platform ID, not the incomplete .NET framework one
        /// </summary>
        /// <returns>Platform ID</returns>
        /// <exception cref="Exception">Unhandled exception</exception>
        public static PlatformID GetRealPlatformID()
        {
            if((int)Environment.OSVersion.Platform < 4 || (int)Environment.OSVersion.Platform == 5)
                return (PlatformID)(int)Environment.OSVersion.Platform;

            int error = uname(out utsname unixname);
            if(error != 0) throw new Exception($"Unhandled exception calling uname: {Marshal.GetLastWin32Error()}");

            switch(unixname.sysname)
            {
                // TODO: Differentiate Linux, Android, Tizen
                case "Linux":
                {
#if __ANDROID__
                        return PlatformID.Android;
#else
                    return PlatformID.Linux;
#endif
                }
                case "Darwin":
                {
                    int osxError;

                    IntPtr pLen = Marshal.AllocHGlobal(sizeof(int));
                    osxError = OSX_sysctlbyname("hw.machine", IntPtr.Zero, pLen, IntPtr.Zero, 0);
                    if(osxError != 0)
                    {
                        Marshal.FreeHGlobal(pLen);

                        throw new Exception($"Unhandled exception calling uname: {Marshal.GetLastWin32Error()}");
                    }

                    int length = Marshal.ReadInt32(pLen);
                    IntPtr pStr = Marshal.AllocHGlobal(length);
                    osxError = OSX_sysctlbyname("hw.machine", pStr, pLen, IntPtr.Zero, 0);
                    if(osxError != 0)
                    {
                        Marshal.FreeHGlobal(pStr);
                        Marshal.FreeHGlobal(pLen);

                        throw new Exception($"Unhandled exception calling uname: {Marshal.GetLastWin32Error()}");
                    }

                    string machine = Marshal.PtrToStringAnsi(pStr);

                    Marshal.FreeHGlobal(pStr);
                    Marshal.FreeHGlobal(pLen);

                    if(machine != null && (machine.StartsWith("iPad", StringComparison.Ordinal) ||
                                           machine.StartsWith("iPod", StringComparison.Ordinal) ||
                                           machine.StartsWith("iPhone", StringComparison.Ordinal)))
                        return PlatformID.iOS;

                    return PlatformID.MacOSX;
                }
                case "GNU": return PlatformID.Hurd;
                case "FreeBSD":
                case "GNU/kFreeBSD": return PlatformID.FreeBSD;
                case "DragonFly": return PlatformID.DragonFly;
                case "Haiku": return PlatformID.Haiku;
                case "HP-UX": return PlatformID.HPUX;
                case "AIX": return PlatformID.AIX;
                case "OS400": return PlatformID.OS400;
                case "IRIX":
                case "IRIX64": return PlatformID.IRIX;
                case "Minix": return PlatformID.Minix;
                case "NetBSD": return PlatformID.NetBSD;
                case "NONSTOP_KERNEL": return PlatformID.NonStop;
                case "OpenBSD": return PlatformID.OpenBSD;
                case "QNX": return PlatformID.QNX;
                case "SINIX-Y": return PlatformID.SINIX;
                case "SunOS": return PlatformID.Solaris;
                case "OSF1": return PlatformID.Tru64;
                case "ULTRIX": return PlatformID.Ultrix;
                case "SCO_SV": return PlatformID.OpenServer;
                case "UnixWare": return PlatformID.UnixWare;
                case "Interix":
                case "UWIN-W7": return PlatformID.Win32NT;
                default:
                {
                    if(unixname.sysname.StartsWith("CYGWIN_NT", StringComparison.Ordinal) ||
                       unixname.sysname.StartsWith("MINGW32_NT", StringComparison.Ordinal) ||
                       unixname.sysname.StartsWith("MSYS_NT", StringComparison.Ordinal) ||
                       unixname.sysname.StartsWith("UWIN", StringComparison.Ordinal)) return PlatformID.Win32NT;

                    return PlatformID.Unknown;
                }
            }
        }

        /// <summary>
        ///     Checks if the underlying runtime runs in 64-bit mode
        /// </summary>
        public static bool Is64Bit()
        {
            return IntPtr.Size == 8;
        }

        /// <summary>
        ///     Checks if the underlying runtime runs in 32-bit mode
        /// </summary>
        public static bool Is32Bit()
        {
            return IntPtr.Size == 4;
        }

        /// <summary>
        ///     Gets a string for the current operating system REAL version (handles Darwin 1.4 and Windows 10 falsifying)
        /// </summary>
        /// <returns>Current operating system version</returns>
        public static string GetVersion()
        {
            string environ = Environment.OSVersion.Version.ToString();

            switch(GetRealPlatformID())
            {
                case PlatformID.MacOSX:
                    if(Environment.OSVersion.Version.Major != 1)
                        return $"10.{Environment.OSVersion.Version.Major - 4}.{Environment.OSVersion.Version.Minor}";

                    switch(Environment.OSVersion.Version.Minor)
                    {
                        case 3: return "10.0";
                        case 4: return "10.1";
                    }

                    goto default;
                case PlatformID.Win32NT:
                    // From Windows 8.1 the reported version is simply falsified...
                    if(Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Major >= 2 ||
                       Environment.OSVersion.Version.Major > 6)
                        return FileVersionInfo
                            .GetVersionInfo(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System),
                                                         "KERNEL32.DLL")).ProductVersion;

                    return environ;
                default: return environ;
            }
        }

        /// <summary>
        ///     From a platform ID and version returns a human-readable version
        /// </summary>
        /// <param name="id">Platform ID</param>
        /// <param name="version">Version number</param>
        /// <returns>Operating system name</returns>
        public static string GetPlatformName(PlatformID id, string version = null)
        {
            switch(id)
            {
                case PlatformID.AIX: return "AIX";
                case PlatformID.Android: return "Android";
                case PlatformID.DragonFly: return "DragonFly BSD";
                case PlatformID.FreeBSD: return "FreeBSD";
                case PlatformID.Haiku: return "Haiku";
                case PlatformID.HPUX: return "HP/UX";
                case PlatformID.Hurd: return "Hurd";
                case PlatformID.iOS: return "iOS";
                case PlatformID.IRIX: return "IRIX";
                case PlatformID.Linux: return "Linux";
                case PlatformID.MacOSX:
                    if(string.IsNullOrEmpty(version)) return "macOS";

                    string[] pieces = version.Split('.');
                    if(pieces.Length < 2 || !int.TryParse(pieces[1], out int minor)) return "macOS";

                    if(minor >= 12) return "macOS";
                    if(minor >= 8) return "OS X";

                    return "Mac OS X";

                case PlatformID.Minix: return "MINIX";
                case PlatformID.NetBSD: return "NetBSD";
                case PlatformID.NonStop: return "NonStop OS";
                case PlatformID.OpenBSD: return "OpenBSD";
                case PlatformID.OpenServer: return "SCO OpenServer";
                case PlatformID.OS400: return "OS/400";
                case PlatformID.PlayStation3: return "Sony CellOS";
                case PlatformID.PlayStation4: return "Sony Orbis OS";
                case PlatformID.QNX: return "QNX";
                case PlatformID.SINIX: return "SINIX";
                case PlatformID.Solaris: return "Sun Solaris";
                case PlatformID.Tizen: return "Samsung Tizen";
                case PlatformID.Tru64: return "Tru64 UNIX";
                case PlatformID.Ultrix: return "Ultrix";
                case PlatformID.Unix: return "UNIX";
                case PlatformID.UnixWare: return "SCO UnixWare";
                case PlatformID.Wii: return "Nintendo Wii";
                case PlatformID.WiiU: return "Nintendo Wii U";
                case PlatformID.Win32NT:
                    if(string.IsNullOrEmpty(version)) return "Windows NT/2000/XP/Vista/7/10";
                    if(version.StartsWith("3.", StringComparison.Ordinal) ||
                       version.StartsWith("4.", StringComparison.Ordinal)) return "Windows NT";
                    if(version.StartsWith("5.0", StringComparison.Ordinal)) return "Windows 2000";
                    if(version.StartsWith("5.1", StringComparison.Ordinal)) return "Windows XP";
                    if(version.StartsWith("5.2", StringComparison.Ordinal)) return "Windows 2003";
                    if(version.StartsWith("6.0", StringComparison.Ordinal)) return "Windows Vista";
                    if(version.StartsWith("6.1", StringComparison.Ordinal)) return "Windows 7";
                    if(version.StartsWith("6.2", StringComparison.Ordinal)) return "Windows 8";
                    if(version.StartsWith("6.3", StringComparison.Ordinal)) return "Windows 8.1";
                    if(version.StartsWith("10.0", StringComparison.Ordinal)) return "Windows 10";

                    return "Windows NT/2000/XP/Vista/7/10";
                case PlatformID.Win32S: return "Windows 3.x with win32s";
                case PlatformID.Win32Windows:
                    if(string.IsNullOrEmpty(version)) return "Windows 9x/Me";
                    if(version.StartsWith("4.0", StringComparison.Ordinal)) return "Windows 95";
                    if(version.StartsWith("4.10.2222", StringComparison.Ordinal)) return "Windows 98 SE";
                    if(version.StartsWith("4.1", StringComparison.Ordinal)) return "Windows 98";
                    if(version.StartsWith("4.9", StringComparison.Ordinal)) return "Windows Me";

                    return "Windows 9x/Me";
                case PlatformID.WinCE: return "Windows CE/Mobile";
                case PlatformID.WindowsPhone: return "Windows Phone";
                case PlatformID.Xbox: return "Xbox OS";
                case PlatformID.zOS: return "z/OS";
                default: return id.ToString();
            }
        }

        /// <summary>
        ///     POSIX uname structure, size from OSX, big enough to handle extra fields
        /// </summary>
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
        struct utsname
        {
            /// <summary>
            ///     System name
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string sysname;
            /// <summary>
            ///     Node name
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string nodename;
            /// <summary>
            ///     Release level
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string release;
            /// <summary>
            ///     Version level
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string version;
            /// <summary>
            ///     Hardware level
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string machine;
        }
    }
}