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[Kernel] Implement File::OpenLinkFile

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wheremyfoodat 2023-03-10 01:04:04 +02:00
parent 2e11cef55c
commit 5966c02737
3 changed files with 33 additions and 1 deletions
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29
src/core/kernel/file_operations.cpp
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@ -5,7 +5,8 @@ namespace FileOps {
Read = 0x080200C2,
Write = 0x08030102,
GetSize = 0x08040000,
Close = 0x08080000
Close = 0x08080000,
OpenLinkFile = 0x080C0000
};
}
@ -21,6 +22,7 @@ void Kernel::handleFileOperation(u32 messagePointer, Handle file) {
switch (cmd) {
case FileOps::Close: closeFile(messagePointer, file); break;
case FileOps::GetSize: getFileSize(messagePointer, file); break;
case FileOps::OpenLinkFile: openLinkFile(messagePointer, file); break;
case FileOps::Read: readFile(messagePointer, file); break;
case FileOps::Write: writeFile(messagePointer, file); break;
default: Helpers::panic("Unknown file operation: %08X", cmd);
@ -154,5 +156,30 @@ void Kernel::getFileSize(u32 messagePointer, Handle fileHandle) {
} else {
Helpers::panic("Tried to get file size of file without file descriptor");
}
}
void Kernel::openLinkFile(u32 messagePointer, Handle fileHandle) {
logFileIO("Open link file (clone) of file %X\n", fileHandle);
const auto p = getObject(fileHandle, KernelObjectType::File);
if (p == nullptr) [[unlikely]] {
Helpers::panic("Called GetFileSize on non-existent file");
}
FileSession* file = p->getData<FileSession>();
if (!file->isOpen) {
Helpers::panic("Tried to clone closed file");
}
// Make clone object
auto handle = makeObject(KernelObjectType::File);
auto& cloneFile = getObjects()[handle];
// Make a clone of the file by copying the archive/archive path/file path/file descriptor/etc of the original file
// TODO: Maybe we should duplicate the file handle instead of copying. This way their offsets will be separate
// However we do seek properly on every file access so this shouldn't matter
cloneFile.data = new FileSession(*file);
mem.write32(messagePointer + 4, Result::Success);
mem.write32(messagePointer + 12, handle);
}