[Lldb-commits] [PATCH] D69320: [lldb] [Python] Do not attempt to flush() a read-only fd

[Michał Górny via Phabricator via lldb-commits]

mgorny created this revision.
mgorny added reviewers: lawrence_danna, labath, krytarowski.

When creating a FileSP object, do not flush() the underlying file unless
it is open for writing.  Attempting to flush() a read-only fd results
in EBADF on NetBSD.


https://reviews.llvm.org/D69320

Files:
  lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp


Index: lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp
===================================================================
--- lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp
+++ lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp
@@ -1367,11 +1367,13 @@
   if (!options)
     return options.takeError();
 
-  // LLDB and python will not share I/O buffers.  We should probably
-  // flush the python buffers now.
-  auto r = CallMethod("flush");
-  if (!r)
-    return r.takeError();
+  if (options.get() & File::eOpenOptionWrite) {
+    // LLDB and python will not share I/O buffers.  We should probably
+    // flush the python buffers now.
+    auto r = CallMethod("flush");
+    if (!r)
+      return r.takeError();
+  }
 
   FileSP file_sp;
   if (borrowed) {


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