Skip to content

realpath in c# #45637

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
kasperk81 wants to merge 3 commits into
base: main
Choose a base branch
from
+15 −22
Open

realpath in c# #45637

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
5c6b7e8
realpath in c#
kasperk81 Dec 27, 2024
13e1e4a
update
kasperk81 Oct 26, 2025
7ac6ec2
Merge branch 'main' into interop
kasperk81 Dec 8, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 12 additions & 5 deletions src/Resolvers/Microsoft.DotNet.NativeWrapper/EnvironmentProvider.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ private IEnumerable<string> SearchPaths
}

string? dotnetExe;
#if NETCOREAPP
#if NET
// The dotnet executable is loading only the .NET version of this code so there is no point checking
// the current process path on .NET Framework. We are expected to find dotnet on PATH.
dotnetExe = _getCurrentProcessPath();
Expand All @@ -70,12 +70,19 @@ private IEnumerable<string> SearchPaths
{
string? dotnetExeFromPath = GetCommandPath(Constants.DotNet);

if (dotnetExeFromPath != null && !Interop.RunningOnWindows)
#if NET
if (dotnetExeFromPath != null && !OperatingSystem.IsWindows())
{
// e.g. on Linux the 'dotnet' command from PATH is a symlink so we need to
// resolve it to get the actual path to the binary
dotnetExeFromPath = Interop.Unix.realpath(dotnetExeFromPath) ?? dotnetExeFromPath;
FileSystemInfo fileInfo = new FileInfo(dotnetExeFromPath);
if ((fileInfo.Attributes & FileAttributes.ReparsePoint) != 0)
{
fileInfo = fileInfo.ResolveLinkTarget(returnFinalTarget: true) ?? fileInfo;
}
dotnetExeFromPath = fileInfo.FullName;
}
#endif

if (!string.IsNullOrWhiteSpace(dotnetExeFromPath))
{
Expand All @@ -86,7 +93,7 @@ private IEnumerable<string> SearchPaths
log?.Invoke($"GetDotnetExeDirectory: dotnet command path not found. Using current process");
log?.Invoke($"GetDotnetExeDirectory: Path variable: {_getEnvironmentVariable(Constants.PATH)}");

#if !NETCOREAPP
#if !NET
// If we failed to find dotnet on PATH, we revert to the old behavior of returning the current process
// path. This is really an error state but we're keeping the contract of always returning a non-empty
// path for backward compatibility.
Expand Down Expand Up @@ -123,7 +130,7 @@ private IEnumerable<string> SearchPaths
private static string? GetCurrentProcessPath()
{
string? currentProcessPath;
#if NET6_0_OR_GREATER
#if NET
currentProcessPath = Environment.ProcessPath;
#else
currentProcessPath = Process.GetCurrentProcess().MainModule.FileName;
Expand Down
20 changes: 3 additions & 17 deletions src/Resolvers/Microsoft.DotNet.NativeWrapper/Interop.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ namespace Microsoft.DotNet.NativeWrapper
public static partial class Interop
{
public static readonly bool RunningOnWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
#if NETCOREAPP
#if NET
private static readonly string? HostFxrPath;
#endif

Expand All @@ -18,7 +18,7 @@ static Interop()
{
PreloadWindowsLibrary(Constants.HostFxr);
}
#if NETCOREAPP
#if NET
else
{
HostFxrPath = (string)AppContext.GetData(Constants.RuntimeProperty.HostFxrPath)!;
Expand All @@ -41,7 +41,7 @@ private static void PreloadWindowsLibrary(string dllFileName)
LoadLibraryExW(dllPath, IntPtr.Zero, LOAD_WITH_ALTERED_SEARCH_PATH);
}

#if NETCOREAPP
#if NET
private static IntPtr HostFxrResolver(Assembly assembly, string libraryName)
{
if (libraryName != Constants.HostFxr)
Expand Down Expand Up @@ -186,20 +186,6 @@ internal delegate void hostfxr_get_available_sdks_result_fn(
internal static extern int hostfxr_get_available_sdks(
string? exe_dir,
hostfxr_get_available_sdks_result_fn result);

[DllImport("libc", CharSet = UTF8, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr realpath(string path, IntPtr buffer);

[DllImport("libc", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
private static extern void free(IntPtr ptr);

public static string? realpath(string path)
{
var ptr = realpath(path, IntPtr.Zero);
var result = PtrToStringUTF8(ptr);
free(ptr);
return result;
}
}
}
}
Loading