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LocalFileSystem: Allow deleting read-only files and directories

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This commit is contained in:
Alex Barney 2021-12-13 16:43:52 -07:00
parent 6910049070
commit 2540f071ea
3 changed files with 82 additions and 3 deletions
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2
src/LibHac/Common/HResult.cs
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@ -19,6 +19,7 @@ internal static class HResult
public const int ERROR_ALREADY_EXISTS = unchecked((int)0x800700B7);
public const int ERROR_DIRECTORY = unchecked((int)0x8007010B);
public const int ERROR_SPACES_NOT_ENOUGH_DRIVES = unchecked((int)0x80E7000B);
public const int COR_E_IO = unchecked((int)0x80131620);
public static Result HResultToHorizonResult(int hResult) => hResult switch
{
@ -35,6 +36,7 @@ internal static class HResult
ERROR_ALREADY_EXISTS => ResultFs.PathAlreadyExists.Value,
ERROR_DIRECTORY => ResultFs.PathNotFound.Value,
ERROR_SPACES_NOT_ENOUGH_DRIVES => ResultFs.UsableSpaceNotEnough.Value,
COR_E_IO => ResultFs.TargetLocked.Value,
_ => ResultFs.UnexpectedInLocalFileSystemE.Value
};
}

2
src/LibHac/FsSystem/Impl/TargetLockedAvoidance.cs
View file

@ -7,7 +7,7 @@ namespace LibHac.FsSystem.Impl;
internal static class TargetLockedAvoidance
{
private const int RetryCount = 2;
private const int RetryCount = 25;
private const int SleepTimeMs = 2;
// Allow usage outside of a Horizon context by using standard .NET APIs

81
src/LibHac/FsSystem/LocalFileSystem.cs
View file

@ -653,7 +653,28 @@ public class LocalFileSystem : IAttributeFileSystem
try
{
dir.Delete(recursive);
try
{
dir.Delete(recursive);
}
catch (Exception ex) when (ex.HResult is HResult.COR_E_IO or HResult.ERROR_ACCESS_DENIED)
{
if (recursive)
{
Result rc = DeleteDirectoryRecursivelyWithReadOnly(dir);
if (rc.IsFailure()) return rc.Miss();
}
else
{
// Try to delete read-only directories by first removing the read-only flag
if (dir.Attributes.HasFlag(FileAttributes.ReadOnly))
{
dir.Attributes &= ~FileAttributes.ReadOnly;
}
dir.Delete(false);
}
}
}
catch (Exception ex) when (ex.HResult < 0)
{
@ -670,7 +691,20 @@ public class LocalFileSystem : IAttributeFileSystem
try
{
file.Delete();
try
{
file.Delete();
}
catch (UnauthorizedAccessException ex) when (ex.HResult == HResult.ERROR_ACCESS_DENIED)
{
// Try to delete read-only files by first removing the read-only flag.
if (file.Attributes.HasFlag(FileAttributes.ReadOnly))
{
file.Attributes &= ~FileAttributes.ReadOnly;
}
file.Delete();
}
}
catch (Exception ex) when (ex.HResult < 0)
{
@ -680,6 +714,49 @@ public class LocalFileSystem : IAttributeFileSystem
return EnsureDeleted(file);
}
private static Result DeleteDirectoryRecursivelyWithReadOnly(DirectoryInfo rootDir)
{
try
{
foreach (FileSystemInfo info in rootDir.EnumerateFileSystemInfos())
{
if (info is FileInfo file)
{
// Check each file for the read-only flag before deleting.
if (file.Attributes.HasFlag(FileAttributes.ReadOnly))
{
file.Attributes &= ~FileAttributes.ReadOnly;
}
file.Delete();
}
else if (info is DirectoryInfo dir)
{
Result rc = DeleteDirectoryRecursivelyWithReadOnly(dir);
if (rc.IsFailure()) return rc.Miss();
}
else
{
return ResultFs.UnexpectedInLocalFileSystemF.Log();
}
}
// The directory should be empty now. Remove any read-only flag and delete it.
if (rootDir.Attributes.HasFlag(FileAttributes.ReadOnly))
{
rootDir.Attributes &= ~FileAttributes.ReadOnly;
}
rootDir.Delete(true);
}
catch (Exception ex) when (ex.HResult < 0)
{
return HResult.HResultToHorizonResult(ex.HResult).Log();
}
return Result.Success;
}
private static Result CreateDirInternal(DirectoryInfo dir, NxFileAttributes attributes)
{
try