[bug #68006] 'system' command unable to redirect stderr or stdout to "nul"

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Follow-up Comment #3, bug #68006 (group octave):

That wasn't meant as a recommendation for a work-around. It was meant as an
observation to help track down the issue.

The following change fixes the behavior for me:

diff --git a/liboctave/system/oct-sysdep.cc b/liboctave/system/oct-sysdep.cc
--- a/liboctave/system/oct-sysdep.cc
+++ b/liboctave/system/oct-sysdep.cc
@@ -82,8 +82,9 @@ system (const std::string& cmd_str)
   // avoid inheriting read end of the pipe
   SetHandleInformation (h_read, HANDLE_FLAG_INHERIT, 0);
 
-  // Create process with new console.
-  std::wstring wcmd_str =  u8_to_wstring (cmd_str);
+  // create process with new hidden console
+  std::wstring wcmd_str {L"cmd.exe /C "};
+  wcmd_str.append (u8_to_wstring (cmd_str));
   STARTUPINFOW si {};
   si.cb = sizeof (si);
   si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;


Essentially, this passes the command to the CMD shell which parses redirects
like `2> nul`.



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