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- Subject: Re: Lua-Ex -- alive or dead?
- From: Duck <duck@...>
- Date: Fri, 17 Aug 2007 08:23:58 +1000 (EST)
Hi Duck, hope the antipodes are treating you well
Christmas and New Year are back in summer where they belong.
As for the builtin io.popen. It works fine in console programs,
Unix/Windows. But it doesn't work _at all_ under Windows
Yes, MSDN itself shamelessly admits that:
/If used in a Windows program, the _popen function returns an invalid file
/pointer that will cause the program to hang indefinitely. _popen works
/properly in a Console application.
and io.popen() uses (unsurprisingly) _popen() when built under Windows.
You can selectively suppress this by undefining LUA_USE_POPEN in
luaconf.h, which would be a simple way to prevent its use when building
Lua for embedding in Windows GUI app you know is Windows GUI based.
/To create a Windows application that redirects input and output, see
/Creating a Child Process with Redirected Input and Output in the Platform
/SDK. (Gratuitously complicated and _very_ slightly non-ANSI C code
I had to laugh at the way MSDN describes a GUI binary as a Windows app,
and a console binary as a Console app, as though it weren't pure enough to
be considered a Windows binary at all, even though it runs on Windows :-)