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service/bsd: Handle Poll with no entries accurately 

Testing shows that Poll called with zero entries returns -1 and signals
an errno of zero.
This commit is contained in:
ReinUsesLisp 2020-07-28 01:51:44 -03:00
parent f7d59f3e0e
commit bc699ace15
1 changed files with 5 additions and 0 deletions
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5
src/core/hle/service/sockets/bsd.cpp
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@ -465,6 +465,11 @@ std::pair<s32, Errno> BSD::PollImpl(std::vector<u8>& write_buffer, std::vector<u
return {-1, Errno::INVAL}; return {-1, Errno::INVAL};
} }
if (nfds == 0) {
// When no entries are provided, -1 is returned with errno zero
return {-1, Errno::SUCCESS};
}
const size_t length = std::min(read_buffer.size(), write_buffer.size()); const size_t length = std::min(read_buffer.size(), write_buffer.size());
std::vector<PollFD> fds(nfds); std::vector<PollFD> fds(nfds);
std::memcpy(fds.data(), read_buffer.data(), length); std::memcpy(fds.data(), read_buffer.data(), length);