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[Hosts] Handle hidden hosts file (#34308)

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* handle hidden hosts file

* don't remove hidden attribute
This commit is contained in:
Davide Giacometti
2024-08-16 20:36:26 +02:00
committed by GitHub
parent 1cbf512ed0
commit 9af757f5ce
4 changed files with 50 additions and 11 deletions
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14
src/modules/Hosts/HostsUILib/Helpers/HostsService.cs
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@@ -23,6 +23,7 @@ namespace HostsUILib.Helpers
public class HostsService : IHostsService, IDisposable
{
private const string _backupSuffix = $"_PowerToysBackup_";
private const int _defaultBufferSize = 4096; // From System.IO.File source code
private readonly SemaphoreSlim _asyncLock = new SemaphoreSlim(1, 1);
private readonly IFileSystem _fileSystem;
@@ -197,7 +198,16 @@ namespace HostsUILib.Helpers
_backupDone = true;
}
await _fileSystem.File.WriteAllLinesAsync(HostsFilePath, lines, Encoding);
// FileMode.OpenOrCreate is necessary to prevent UnauthorizedAccessException when the hosts file is hidden
using var stream = _fileSystem.FileStream.Create(HostsFilePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read, _defaultBufferSize, FileOptions.Asynchronous);
using var writer = new StreamWriter(stream, Encoding);
foreach (var line in lines)
{
await writer.WriteLineAsync(line.AsMemory());
}
stream.SetLength(stream.Position);
await writer.FlushAsync();
}
finally
{
@@ -292,7 +302,7 @@ namespace HostsUILib.Helpers
}
}
public void RemoveReadOnly()
public void RemoveReadOnlyAttribute()
{
var fileInfo = _fileSystem.FileInfo.FromFileName(HostsFilePath);
if (fileInfo.IsReadOnly)

2
src/modules/Hosts/HostsUILib/Helpers/IHostsService.cs
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@@ -25,6 +25,6 @@ namespace HostsUILib.Helpers
void OpenHostsFile();
void RemoveReadOnly();
void RemoveReadOnlyAttribute();
}
}