# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1380909205 14400
# Node ID 1b388d922e6bfba0f62b6ff39f0e895f3b8312fa
# Parent  0b3cf264ec2fd7fb8f24ddc68a38e972563863f6
provide --no-fork command line option

* octave.cc (no_fork_option): New static varaible.
(NO_FORK_OPTION): New macro.
(long_opts): Include it in the list.
(usage_string, verbose_usage): Update for new --no-fork option.
(octave_process_command_line): Handle NO_FORK_OPTION case.

* octave-gui.h, octave-gui.cc (octave_start_gui): New arg, fork.
Don't call dissociate_terminal if fork is false.
* octave.h, octave.cc (octave_fork_gui): New function.
* main.cc (main): Use it to pass --no-fork option to gui.

diff -r 0b3cf264ec2f -r 1b388d922e6b libgui/src/octave-gui.cc
--- a/libgui/src/octave-gui.cc	Fri Oct 04 10:35:45 2013 -0700
+++ b/libgui/src/octave-gui.cc	Fri Oct 04 13:53:25 2013 -0400
@@ -88,9 +88,10 @@
 }
 
 int
-octave_start_gui (int argc, char *argv[])
+octave_start_gui (int argc, char *argv[], bool fork)
 {
-  dissociate_terminal ();
+  if (fork)
+    dissociate_terminal ();
 
   QApplication application (argc, argv);
 
diff -r 0b3cf264ec2f -r 1b388d922e6b libgui/src/octave-gui.h
--- a/libgui/src/octave-gui.h	Fri Oct 04 10:35:45 2013 -0700
+++ b/libgui/src/octave-gui.h	Fri Oct 04 13:53:25 2013 -0400
@@ -23,6 +23,7 @@
 #if !defined (octave_octave_gui_h)
 #define octave_octave_gui_h 1
 
-extern OCTGUI_API int octave_start_gui (int argc, char **argv);
+extern OCTGUI_API int octave_start_gui (int argc, char **argv,
+                                        bool fork = true);
 
 #endif
diff -r 0b3cf264ec2f -r 1b388d922e6b libinterp/octave.cc
--- a/libinterp/octave.cc	Fri Oct 04 10:35:45 2013 -0700
+++ b/libinterp/octave.cc	Fri Oct 04 13:53:25 2013 -0400
@@ -125,6 +125,10 @@
 // (--force-gui)
 static bool force_gui_option = false;
 
+// If TRUE don't fork when starting the GUI.
+// (--no-fork)
+static bool no_fork_option = false;
+
 // If TRUE don't start the GUI.
 // (--no-gui)
 static bool no_gui_option = false;
@@ -159,7 +163,7 @@
        [--echo-commands] [--eval CODE] [--exec-path path]\n\
        [--force-gui] [--help] [--image-path path]\n\
        [--info-file file] [--info-program prog] [--interactive]\n\
-       [--line-editing] [--no-gui] [--no-history]\n\
+       [--line-editing] [--no-fork] [--no-gui] [--no-history]\n\
        [--no-init-file] [--no-init-path] [--no-jit-compiler]\n\
        [--no-line-editing] [--no-site-file] [--no-window-system]\n\
        [--norc] [-p path] [--path path] [--persist] [--silent]\n\
@@ -194,15 +198,16 @@
 #define INFO_PROG_OPTION 8
 #define DEBUG_JIT_OPTION 9
 #define LINE_EDITING_OPTION 10
-#define NO_GUI_OPTION 11
-#define NO_INIT_FILE_OPTION 12
-#define NO_INIT_PATH_OPTION 13
-#define NO_JIT_COMPILER_OPTION 14
-#define NO_LINE_EDITING_OPTION 15
-#define NO_SITE_FILE_OPTION 16
-#define PERSIST_OPTION 17
-#define TEXI_MACROS_FILE_OPTION 18
-#define TRADITIONAL_OPTION 19
+#define NO_FORK_OPTION 11
+#define NO_GUI_OPTION 12
+#define NO_INIT_FILE_OPTION 13
+#define NO_INIT_PATH_OPTION 14
+#define NO_JIT_COMPILER_OPTION 15
+#define NO_LINE_EDITING_OPTION 16
+#define NO_SITE_FILE_OPTION 17
+#define PERSIST_OPTION 18
+#define TEXI_MACROS_FILE_OPTION 19
+#define TRADITIONAL_OPTION 20
 struct option long_opts[] = {
   { "braindead",                no_argument,       0, TRADITIONAL_OPTION },
   { "built-in-docstrings-file", required_argument, 0, BUILT_IN_DOCSTRINGS_FILE_OPTION },
@@ -219,6 +224,7 @@
   { "info-program",             required_argument, 0, INFO_PROG_OPTION },
   { "interactive",              no_argument,       0, 'i' },
   { "line-editing",             no_argument,       0, LINE_EDITING_OPTION },
+  { "no-fork",                  no_argument,       0, NO_FORK_OPTION },
   { "no-gui",                   no_argument,       0, NO_GUI_OPTION },
   { "no-history",               no_argument,       0, 'H' },
   { "no-init-file",             no_argument,       0, NO_INIT_FILE_OPTION },
@@ -537,6 +543,7 @@
   --info-program PROGRAM  Use PROGRAM for reading info files.\n\
   --interactive, -i       Force interactive behavior.\n\
   --line-editing          Force readline use for command-line editing.\n\
+  --no-fork               Don't fork when starting the graphical user interface.\n\
   --no-gui                Disable the graphical user interface.\n\
   --no-history, -H        Don't save commands to the history list\n\
   --no-init-file          Don't read the ~/.octaverc or .octaverc files.\n\
@@ -787,6 +794,10 @@
           forced_line_editing = true;
           break;
 
+        case NO_FORK_OPTION:
+          no_fork_option = true;
+          break;
+
         case NO_GUI_OPTION:
           no_gui_option = true;
           break;
@@ -1071,6 +1082,12 @@
   return start_gui;
 }
 
+int
+octave_fork_gui (void)
+{
+  return ! no_fork_option;
+}
+
 DEFUN (isguirunning, args, ,
   "-*- texinfo -*-\n\
 @deftypefn {Built-in Function} {} isguirunning ()\n\
diff -r 0b3cf264ec2f -r 1b388d922e6b libinterp/octave.h
--- a/libinterp/octave.h	Fri Oct 04 10:35:45 2013 -0700
+++ b/libinterp/octave.h	Fri Oct 04 13:53:25 2013 -0400
@@ -41,6 +41,7 @@
 extern OCTINTERP_API int octave_embedded;
 
 extern OCTINTERP_API int octave_starting_gui (void);
+extern OCTINTERP_API int octave_fork_gui (void);
 
 #ifdef  __cplusplus
 }
diff -r 0b3cf264ec2f -r 1b388d922e6b src/main.cc
--- a/src/main.cc	Fri Oct 04 10:35:45 2013 -0700
+++ b/src/main.cc	Fri Oct 04 13:53:25 2013 -0400
@@ -41,7 +41,7 @@
   install_defaults ();
 
   if (octave_starting_gui ())
-    retval = octave_start_gui (argc, argv);
+    retval = octave_start_gui (argc, argv, octave_fork_gui ());
   else
     {
       octave_initialize_interpreter (argc, argv, 0);