wxZipInputStream reading GetExternalAttributes accurately (Issue #26616)

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scottb88

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Jun 20, 2026, 5:40:59 PM (3 days ago) Jun 20

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scottb88 created an issue (wxWidgets/wxWidgets#26616)

Description

I need to read external attributes.
The bit that distinguishes a symlink from a regular file is always cleared (reads as regular file)

Bug description:

During the execution of wxZipInputStream::GetNextEntry
the value of m_ExternalAttributes of wxZipEntry is read accurately by wxZipEntry::ReadCentral.

But before it returns,
wxZipEntry::SetName is called (master src/common/zipstrm.cpp:1188)
which calls SetIsDir(false) (master include/wx/zipstrm.h:591)
and it clears the symlink bit.

Expected behaviour:

The external attributes returned by wxZipEntry::GetExternalAttributes
accurately reflect the external attributes stored in the zip file.

When printing the external attributes as hexadecimal,
the first digit is '8' for a regular file, and 'A' for a symlink.

Minimal fix: keep symlink bit.
Enhancement: fully support symlinks

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VZ

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Jun 21, 2026, 10:47:26 AM (3 days ago) Jun 21

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vadz left a comment (wxWidgets/wxWidgets#26616)

I agree that it would make sense to add some IsSymlink() to wxArchiveEntry, any PRs doing this and implementing support for it in wxZipInputStream would be welcome.