Write a Linux file system in .NET.
Tmds.Fuse supports Linux x64 platforms with libfuse 3.1+.
To use a daily build, add the myget NuGet feed to NuGet.Config.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<add key="tmds" value="https://www.myget.org/F/tmds/api/v3/index.json" />
</packageSources>
</configuration>Add a package reference to your project.
dotnet add package Tmds.Fuse --version '0.1.0-*'Implement a simple file system:
using System;
using System.Text;
using Tmds.Fuse;
using static Tmds.Linux.LibC;
class HelloFileSystem : FuseFileSystemBase
{
private static readonly byte[] _helloFilePath = Encoding.UTF8.GetBytes("/hello");
private static readonly byte[] _helloFileContent = Encoding.UTF8.GetBytes("hello world!");
public override int GetAttr(ReadOnlySpan<byte> path, ref stat stat, FuseFileInfoRef fiRef)
{
if (path.SequenceEqual(FuseConstants.RootPath))
{
stat.st_mode = S_IFDIR | 0b111_101_101; // rwxr-xr-x
stat.st_nlink = 2; // 2 + nr of subdirectories
return 0;
}
else if (path.SequenceEqual(_helloFilePath))
{
stat.st_mode = S_IFREG | 0b100_100_100; // r--r--r--
stat.st_nlink = 1;
stat.st_size = _helloFileContent.Length;
return 0;
}
else
{
return -ENOENT;
}
}
public override int Open(ReadOnlySpan<byte> path, ref FuseFileInfo fi)
{
if (!path.SequenceEqual(_helloFilePath))
{
return -ENOENT;
}
if ((fi.flags & O_ACCMODE) != O_RDONLY)
{
return -EACCES;
}
return 0;
}
public override int Read(ReadOnlySpan<byte> path, ulong offset, Span<byte> buffer, ref FuseFileInfo fi)
{
if (offset > (ulong)_helloFileContent.Length)
{
return 0;
}
int intOffset = (int)offset;
int length = (int)Math.Min(_helloFileContent.Length - intOffset, buffer.Length);
_helloFileContent.AsSpan().Slice(intOffset, length).CopyTo(buffer);
return length;
}
public override int ReadDir(ReadOnlySpan<byte> path, ulong offset, ReadDirFlags flags, DirectoryContent content, ref FuseFileInfo fi)
{
if (!path.SequenceEqual(FuseConstants.RootPath))
{
return -ENOENT;
}
content.AddEntry(".");
content.AddEntry("..");
content.AddEntry("hello");
return 0;
}
}Implement the Main method:
static async Task Main(string[] args)
{
if (!Fuse.CheckDependencies())
{
Console.WriteLine(Fuse.InstallationInstructions);
return;
}
using (var mount = Fuse.Mount("/tmp/mountpoint", new HelloFileSystem()))
{
await mount.WaitForUnmountAsync();
}
}Create the mountpoint directory:
$ mkdir /tmp/mountpointRun the program:
$ dotnet run
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