service/bsd: Handle Poll with no entries accurately
Testing shows that Poll called with zero entries returns -1 and signals an errno of zero.
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@ -465,6 +465,11 @@ std::pair<s32, Errno> BSD::PollImpl(std::vector<u8>& write_buffer, std::vector<u
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return {-1, Errno::INVAL};
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}
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if (nfds == 0) {
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// When no entries are provided, -1 is returned with errno zero
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return {-1, Errno::SUCCESS};
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}
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const size_t length = std::min(read_buffer.size(), write_buffer.size());
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std::vector<PollFD> fds(nfds);
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std::memcpy(fds.data(), read_buffer.data(), length);
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