Console.IsInputRedirected returns true on git bash when there is no redirected input

[josefpihrt]

Description

Hi,

I have command-line tool (roslynator) that tries to read redirected input and use it as an input for the program (in my case it's a list of solutions to be analyzed).

Example code:

get-solution-paths | roslynator analyze

For this purpose I use Console.IsInputRedirected which works fine on Windows Terminal with Powershell.

The problem is that when I run just roslynator analyze on git bash (git-bash.exe) Console.IsInputRedirected returns true and then the execution is blocked when program tries to read input from console (when there is no redirected input):

https://github.com/dotnet/roslynator/blob/e030192b1dc5359df48e5dd15af79b5c807f481c/src/CommandLine/ConsoleHelpers.cs#L20

Thanks for help in advance.

Reproduction Steps

1. dotnet tool install roslynator.dotnet.cli -g --version 0.7.2
2. run git-bash.exe from git installation folder
3. from git bash run roslynator analyze <PATH-TO-SOLUTION> -v diag
4. The execution is blocked when program tries to read redirected input

Expected behavior

Console.IsInputRedirected should return false when there is no redirected input

Actual behavior

Console.IsInputRedirected returns true on git bash when there is no redirected input.

Regression?

No response

Known Workarounds

Set timeout for a task that tries to read redirected input:

Task<IEnumerable<string>> task = ConsoleHelpers.ReadRedirectedInputAsLines();

if (task.Wait(TimeSpan.FromMilliseconds(1000)))
{
}

Configuration

• Windows 10 Pro x64
• .NET SDK 8.0.100
• git 2.42.0.windows.2

Other information

No response

[ghost]

Tagging subscribers to this area: @dotnet/area-system-console See info in area-owners.md if you want to be subscribed.

Issue Details

---

### Description Hi, I have command-line tool (roslynator) that tries to read redirected input and use it as an input for the program (in my case it's a list of solutions to be analyzed). Example code: ``` get-solution-paths | roslynator analyze ``` For this purpose I use `Console.IsInputRedirected` which works fine on Windows Terminal with Powershell. The problem is that when I run just `roslynator analyze` on git bash (`git-bash.exe`) `Console.IsInputRedirected` returns true and then the execution is blocked when program tries to read input from console (when there is no redirected input): https://github.com/dotnet/roslynator/blob/e030192b1dc5359df48e5dd15af79b5c807f481c/src/CommandLine/ConsoleHelpers.cs#L20 Thanks for help in advance. ### Reproduction Steps 1. `dotnet tool install roslynator.dotnet.cli -g --version 0.7.2` 1. run `git-bash.exe` from git installation folder 1. from git bash run `roslynator analyze -v diag` 1. The execution is blocked when program tries to read redirected input ### Expected behavior Console.IsInputRedirected should return false when there is no redirected input ### Actual behavior Console.IsInputRedirected returns true on git bash when there is no redirected input. ### Regression? _No response_ ### Known Workarounds Set timeout for a task that tries to read redirected input: ```csharp Task> task = ConsoleHelpers.ReadRedirectedInputAsLines(); if (task.Wait(TimeSpan.FromMilliseconds(1000))) { } ``` ### Configuration - Windows 10 Pro x64 - .NET SDK 8.0.100 - git 2.42.0.windows.2 ### Other information _No response_

Author:	josefpihrt
Assignees:	-
Labels:	`area-System.Console`
Milestone:	-

[adamsitnik]

I've tried to reproduce the problem and failed to do so.

namespace ConsoleInputRedirected
{
    internal class Program
    {
        static void Main() => Console.WriteLine($"Console.IsInputRedirected={Console.IsInputRedirected}");
    }
}

[adamsitnik]

[ghost]

This issue has been marked needs-author-action and may be missing some important information.

[josefpihrt]

Thank you for your answer @adamsitnik.

I used your console app and run it in git-bash with following result:

I have the latest version of git (2.43.0) so the only difference between yours and mine configuration could be the operation system. I have Windows 10 Pro 10.0.19045.

[adamsitnik]

@josefpihrt Is there any chance you could debug it? You could add System.Diagnostics.Debugger.Launch(); and step into framework code with F11.

I am mostly interested in what happens here:

https://github.com/dotnet/runtime/blob/721c445e494a1d85d2d12e7a99ac2cd94bb898fa/src/libraries/System.Console/src/System/ConsolePal.Windows.cs#L147-L156

[josefpihrt]

I was able to debug the process, here are the results:

• IsHandleRedirected returns true:
  • fileType is 3
  • global::Interop.Kernel32.IsGetConsoleModeCallSuccessful(handle) returns false
  • GetConsoleMode returns false:
    • lastSystemError is 6

Let me know if you need more data.

[josefpihrt]

@adamsitnik ping

[KalleOlaviNiemitalo]

The behavior might depend on whether Git Bash is using the Windows pseudoconsole feature (MSYS=enable_pcon in git-bash.config).