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LibArchive: Implement proper support for Tar file end markers

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Previously this was handled implicitly, as our implementation of Tar
would just stop processing input as soon as it found something invalid.
However, since we now error out as soon as something is found to be
wrong, we require proper handling for zero blocks, which aren't actually
fatal.
This commit is contained in:
Tim Schumacher 2022-11-29 01:01:13 +01:00 • committed by Andreas Kling
parent cb48b9bc30
commit 714f0c3dce
4 changed files with 33 additions and 7 deletions
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3
Userland/Libraries/LibArchive/TarStream.h
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@ -35,7 +35,7 @@ class TarInputStream {
public:
static ErrorOr<NonnullOwnPtr<TarInputStream>> construct(NonnullOwnPtr<Core::Stream::Stream>);
ErrorOr<void> advance();
bool finished() const { return m_stream->is_eof(); }
bool finished() const { return m_found_end_of_archive || m_stream->is_eof(); }
ErrorOr<bool> valid() const;
TarFileHeader const& header() const { return m_header; }
TarFileStream file_contents();
@ -51,6 +51,7 @@ private:
NonnullOwnPtr<Core::Stream::Stream> m_stream;
unsigned long m_file_offset { 0 };
int m_generation { 0 };
bool m_found_end_of_archive { false };
friend class TarFileStream;
};