Re: g_message and g_warning under Windows

[Tor Lillqvist <tml iki fi>]

Richard Gipps writes:
> I am using the MinGW port of GCC and this doesn't seem to support 
> dup2().

Sure it does. (dup2() is in the C library, MSVCRT.DLL, the compiler
doesn't have much to do with supporting it, except that the headers
for the C library, and import libraries, are bundled with it.) dup2()
is declared in the <io.h> header. Do you actually get link errors that
it isn't found?

> Tor which port of the GCC compiler are you using?

MinGW.

> fd = open ("error.log", O_WRONLY);

Hmm, one needs to use O_CREAT, too, and maybe O_TRUNC. (Hey, that was
just a code snippet typed in without testing. Yes, I know one
shouldn't do that. Note to self: always provide complete, tested, code
snippets. Sigh.)

I now checked whether the below complete program actually works, and
yes it does. Error checking obviously still is missing, so if the
open() or dup2() fail for some reason, it will silently fail to work
as expected.

#include <glib.h>
#include <io.h>
#include <fcntl.h>

int
main (int argc, char **argv)
{
  int fd = open ("stdout.log", O_CREAT|O_WRONLY|O_TRUNC, 0666);
  dup2 (fd, 2);
  g_message ("blah\n");

  return 0;
}

--tml