sdl nograb

diff -r 5c78dd111aae sdl.c
@@ -451,7 +451,7 @@
                         gui_key_modifier_pressed = 0;
                         if (gui_keysym == 0) {
                             /* exit/enter grab if pressing Ctrl-Alt */
-                            if (!gui_grab) {
+                            if (!gui_grab && !grab_disabled) {
                                 /* if the application is not active,
                                    do not try to enter grab state. It
                                    prevents

@@ -481,7 +481,7 @@
             break;
         case SDL_MOUSEMOTION:
             if (gui_grab || kbd_mouse_is_absolute() ||
-                absolute_enabled) {
+                absolute_enabled || grab_disabled) {
                 sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
                        ev->motion.x, ev->motion.y, ev->motion.state);
             }

@@ -490,7 +490,7 @@
         case SDL_MOUSEBUTTONUP:
             {
                 SDL_MouseButtonEvent *bev = &ev->button;
-                if (!gui_grab && !kbd_mouse_is_absolute()) {
+                if (!gui_grab && !kbd_mouse_is_absolute() && !grab_disabled) {
                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
                         (bev->button == SDL_BUTTON_LEFT)) {
                         /* start grabbing all events */

@@ -655,7 +655,10 @@
     atexit(sdl_cleanup);
     if (full_screen) {
         gui_fullscreen = 1;
-        gui_fullscreen_initial_grab = 1;
-        sdl_grab_start();
+        if (!grab_disabled)
+        {
+            gui_fullscreen_initial_grab = 1;
+            sdl_grab_start();
+        }
     }
 }

diff -r 5c78dd111aae sysemu.h
@@ -90,6 +90,7 @@
 extern const char *keyboard_layout;
 extern int win2k_install_hack;
 extern int alt_grab;
+extern int grab_disabled;
 extern int usb_enabled;
 extern int smp_cpus;
 extern int cursor_hide;

diff -r 5c78dd111aae vl.c
@@ -227,6 +227,7 @@
 #endif
 const char *qemu_name;
 int alt_grab = 0;
+int grab_disabled = 0;
 #ifdef TARGET_SPARC
 unsigned int nb_prom_envs = 0;
 const char *prom_envs[MAX_PROM_ENVS];

@@ -4685,6 +4686,7 @@
            "-no-frame       open SDL window without a frame and window decorations\n"
            "-alt-grab       use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n"
            "-no-quit        disable SDL window close capability\n"
+           "-nograb         never grab mouse and keyboard\n"
 #endif
 #ifdef TARGET_I386
            "-no-fd-bootchk  disable boot signature checking for floppy disks\n"

@@ -4883,6 +4885,7 @@
     QEMU_OPTION_full_screen,
     QEMU_OPTION_no_frame,
     QEMU_OPTION_alt_grab,
+    QEMU_OPTION_nograb,
     QEMU_OPTION_no_quit,
     QEMU_OPTION_pidfile,
     QEMU_OPTION_no_kqemu,

@@ -4988,6 +4991,7 @@
     { "no-frame", 0, QEMU_OPTION_no_frame },
     { "alt-grab", 0, QEMU_OPTION_alt_grab },
     { "no-quit", 0, QEMU_OPTION_no_quit },
+    { "nograb", 0, QEMU_OPTION_nograb },
 #endif
     { "pidfile", HAS_ARG, QEMU_OPTION_pidfile },
     { "win2k-hack", 0, QEMU_OPTION_win2k_hack },

@@ -5776,6 +5780,9 @@
                 break;
             case QEMU_OPTION_no_quit:
                 no_quit = 1;
+                break;
+            case QEMU_OPTION_nograb:
+                grab_disabled = 1;
                 break;
 #endif
             case QEMU_OPTION_pidfile: