folly: AsyncIOOp: improve logging message: add strerror

Reviewed By: @philippv Differential Revision: D2240628

folly: AsyncIOOp: improve logging message: add strerror
Reviewed By: @philippv Differential Revision: D2240628
5016d8c7 · Lucian Grijincu · Sara Golemon · 0525207e · 5016d8c7
Commit 5016d8c7 authored Jul 14, 2015 by Lucian Grijincu Committed by Sara Golemon Jul 15, 2015
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folly/experimental/io/AsyncIO.cpp folly/experimental/io/AsyncIO.cpp +5 -1

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--- a/folly/experimental/io/AsyncIO.cpp
+++ b/folly/experimental/io/AsyncIO.cpp
@@ -368,7 +368,11 @@ std::ostream& operator<<(std::ostream& os, const AsyncIOOp& op) {
  }
  if (op.state_ == AsyncIOOp::State::COMPLETED) {
-    os << "result=" << op.result_ << ", ";
+    os << "result=" << op.result_;
+    if (op.result_ < 0) {
+      os << " (" << errnoStr(-op.result_) << ')';
+    }
+    os << ", ";
  }
  return os << "}";