Glib, spawning processes & redirection

[Jann - Ove Risvik <jann ove gmail com>]

How do I redirect output(stdout) from a process spawned with one of the 
standard glib spawn functions to a file?
I have managed to capture output in a gchar pointer, but if I try to do 
something with it, my app just segfaults.
Any solution is welcome.

Snippet on how I have managed to capture output included below:

      gchar *output;
      gchar *commandline;
      gchar *prefix2 = "Eterm -e wine ";
[...]
      gchar * commandline = g_strjoin(NULL,prefix1, " disasm ", 
filename, NULL);
      gtk_progress_bar_set_text (progress, "Disasembling");
      g_spawn_command_line_sync (commandline, &output, NULL, NULL,  
&myerror);

Filename is retrieved with filename = gtk_file_chooser_get_filename 
(GTK_FILE_CHOOSER (dialog));

Help needed!
I know how I would have done it in perl, but with glib & c I'm clueless.
I need to have it done in a cross platform frinedly matter too.
Putting > in commandline didn't help either.

     Jann -Ove Risvik