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LibArchive: Support writing paths up to 255 characters

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The POSIX.1-1988 limit was 100, but with the ustar prefix field it's 255
(kinda).
This commit is contained in:
Peter Elliott 2022-10-24 20:47:07 -06:00 • committed by Linus Groh
parent 9ae36e2035
commit 612a3324d7
3 changed files with 22 additions and 2 deletions
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18
Userland/Libraries/LibArchive/Tar.cpp
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@ -35,4 +35,22 @@ bool TarFileHeader::content_is_like_extended_header() const
return type_flag() == TarFileType::ExtendedHeader || type_flag() == TarFileType::GlobalExtendedHeader;
}
void TarFileHeader::set_filename_and_prefix(StringView filename)
{
// FIXME: Add support for extended tar headers for longer filenames.
VERIFY(filename.length() <= sizeof(m_filename) + sizeof(m_prefix));
if (filename.length() <= sizeof(m_filename)) {
set_prefix(""sv);
set_filename(filename);
return;
}
Optional<size_t> slash = filename.find('/', filename.length() - sizeof(m_filename));
VERIFY(slash.has_value());
set_prefix(filename.substring_view(0, slash.value() + 1));
set_filename(filename.substring_view(slash.value() + 1));
}
}