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IO write permissions #281

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Merged
akeit0 merged 2 commits into from
Mar 26, 2026
Merged

IO write permissions #281

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52c6713
IO library open in Write instead of WriteUpdate
ashtonmeuser Mar 20, 2026
c54af1b
Throw if attempting to write without permission
ashtonmeuser Mar 20, 2026
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2 changes: 2 additions & 0 deletions src/Lua/IO/LuaStream.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,8 @@ public ValueTask<string> ReadAllAsync(CancellationToken cancellationToken)

public ValueTask WriteAsync(ReadOnlyMemory<char> buffer, CancellationToken cancellationToken)
{
mode.ThrowIfNotWritable();

if (mode.IsAppend())
{
innerStream.Seek(0, SeekOrigin.End);
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2 changes: 1 addition & 1 deletion src/Lua/Standard/IOLibrary.cs
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Expand Up @@ -168,7 +168,7 @@ public async ValueTask<int> Output(LuaFunctionExecutionContext context, Cancella
}
else
{
var stream = await context.GlobalState.Platform.FileSystem.Open(arg.ToString(), LuaFileOpenMode.WriteUpdate, cancellationToken);
var stream = await context.GlobalState.Platform.FileSystem.Open(arg.ToString(), LuaFileOpenMode.Write, cancellationToken);
FileHandle handle = new(stream);
io["_IO_output"] = new(handle);
return context.Return(new LuaValue(handle));
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