C#•2y ago

❔ Hardlink in Linux .NET 6.0

Dose anyone have a solution or guide to tell me how to essentially ln from within a .NET 6.0 console program ? If I have to spawn ln I will but I'd rather achieve it without that if possible.

4 Replies

Klarth•2y ago

You'll need to p/invoke something native. Possibly libc's link. You can run through an example like https://github.com/ProfessionalCSharp/ProfessionalCSharp2021/blob/main/5_More/PInvoke/PInvokeSampleLib/Linux/LinuxNativeMethods.cs Since you're on .NET 6, you won't be able to use [LibraryImport]. You'll need to use the older [DllImport]. There are probably other examples on GitHub if you search DllImport libc link and filter to C# if necessary. (Also verify that the docs state it creates a hard link and not a symbolic link.)

mtreit•2y ago

using System.Runtime.InteropServices;

int result = link("a.txt", "link.txt");
Console.WriteLine(result);

[DllImport("libc")]
static extern int link(string oldpath, string newpath);

using System.Runtime.InteropServices;

int result = link("a.txt", "link.txt");
Console.WriteLine(result);

[DllImport("libc")]
static extern int link(string oldpath, string newpath);

This seems to work...

robb06OP•2y ago

oh nice, thank you. I will look at that now 🙂

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Hardlink in Linux .NET 6.0