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[NO MERGE] azure linux failures experiment #120692

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c4fb95d
Print out the actual error no from the failed lseek.
ManickaP Oct 10, 2025
9565461
More info
ManickaP Oct 10, 2025
122a78c
test
ManickaP Oct 13, 2025
687b578
test
ManickaP Oct 13, 2025
f02b9c0
test
ManickaP Oct 14, 2025
d715c19
Experiment
rzikm Oct 14, 2025
d2d4d8f
Update MsQuicTests.cs
rzikm Oct 15, 2025
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13 changes: 13 additions & 0 deletions src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
using System.Diagnostics.Tracing;
using System.Linq;
using System.Net.Security;
using System.IO;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Security.Authentication;
Expand Down Expand Up @@ -182,6 +183,18 @@ bool TestWeakReferences()
[Fact]
public async Task ConnectWithCertificateChain()
{
FileStream file = new FileStream("/proc/net/route", FileMode.Open, FileAccess.Read);

System.Console.WriteLine($"Position: {file.Position}, CanSeek: {file.CanSeek}, Length: {file.Length}");

file.Position = 1;

System.Console.WriteLine($"SafeFileHandle: {file.SafeFileHandle}");

System.Console.WriteLine($"Position: {file.Position}, CanSeek: {file.CanSeek}, Length: {file.Length}");
file.ReadByte();
System.Console.WriteLine($"Position: {file.Position}, CanSeek: {file.CanSeek}, Length: {file.Length}");

X509Certificate2 certificate = _certificates.ServerCert;
X509Certificate2Collection chain = _certificates.ServerChain;

Expand Down
12 changes: 11 additions & 1 deletion src/libraries/System.Private.CoreLib/src/Microsoft/Win32/SafeHandles/SafeFileHandle.Unix.cs
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Expand Up @@ -5,7 +5,9 @@
using System.Diagnostics;
using System.IO;
using System.IO.Strategies;
using System.Runtime.InteropServices;
using System.Threading;
using Internal;

namespace Microsoft.Win32.SafeHandles
{
Expand Down Expand Up @@ -333,7 +335,15 @@ private bool Init(string path, FileMode mode, FileAccess access, FileShare share
// and for regular files (most common case)
// avoid one extra sys call for determining whether file can be seeked
_canSeek = NullableBool.True;
Debug.Assert(Interop.Sys.LSeek(this, 0, Interop.Sys.SeekWhence.SEEK_CUR) >= 0);
long result = Interop.Sys.LSeek(this, 0, Interop.Sys.SeekWhence.SEEK_CUR);
if (result < 0)
{
var errno = Interop.Sys.GetErrNo();
Console.WriteLine("LSeek failed with error: " + errno + " message: " + Marshal.GetPInvokeErrorMessage(errno));
Console.WriteLine($"Path '{path}' {(File.Exists(path) ? "exists" : "doesn't exist")}.");
Console.WriteLine($"Path '{path}' = {new FileInfo(path).Attributes}.");
}
//Debug.Assert(result >= 0);
}

fileLength = status.Size;
Expand Down
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