Feat/poll oneoff implementation #2
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Handle error.NotLink in toWasiError() to return EINVAL instead of panicking when path_readlink is called on a regular file (non-symlink). This fixes CPython 3.13.1 and other WASI programs that use path_readlink for symlink detection during import resolution. Per POSIX/WASI spec, readlink should return EINVAL when the target is not a symbolic link. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implements WASI poll_oneoff syscall to enable: - Non-blocking socket I/O - File descriptor polling (similar to select/poll) - Support for Python's select module and socket timeouts Implementation supports FD_READ and FD_WRITE events with 100ms timeout. Uses fixed-size buffer (64 fds) to avoid dynamic allocation complexity. This enables requests/urllib3 to work with Python's standard socket library.
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