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80 lines
2.3 KiB
80 lines
2.3 KiB
using System;
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using System.IO;
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using NzbDrone.Common.EnvironmentInfo;
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namespace NzbDrone.Common.Disk
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{
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public static class LongPathSupport
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{
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private static int MAX_PATH;
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private static int MAX_NAME;
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public static void Enable()
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{
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// Mono has an issue with enabling long path support via app.config.
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// This works for both mono and .net on Windows.
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AppContext.SetSwitch("Switch.System.IO.UseLegacyPathHandling", false);
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AppContext.SetSwitch("Switch.System.IO.BlockLongPaths", false);
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DetectLongPathLimits();
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}
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private static void DetectLongPathLimits()
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{
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if (!int.TryParse(Environment.GetEnvironmentVariable("MAX_PATH"), out MAX_PATH))
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{
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if (OsInfo.IsLinux)
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{
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MAX_PATH = 4096;
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}
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else
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{
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try
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{
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// Windows paths can be up to 32,767 characters long, but each component of the path must be less than 255.
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// If the OS does not have Long Path enabled, then the following will throw an exception
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// ref: https://docs.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation
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Path.GetDirectoryName($@"C:\{new string('a', 254)}\{new string('a', 254)}");
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MAX_PATH = 4096;
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}
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catch
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{
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MAX_PATH = 260 - 1;
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}
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}
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}
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if (!int.TryParse(Environment.GetEnvironmentVariable("MAX_NAME"), out MAX_NAME))
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{
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MAX_NAME = 255;
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}
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}
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public static int MaxFilePathLength
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{
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get
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{
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if (MAX_PATH == 0)
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{
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DetectLongPathLimits();
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}
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return MAX_PATH;
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}
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}
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public static int MaxFileNameLength
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{
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get
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{
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if (MAX_NAME == 0)
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{
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DetectLongPathLimits();
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}
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return MAX_NAME;
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}
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}
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}
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}
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