Introduce -display none
New option -display none. This option differs from -nographic by not
trying to take control of stdio etc. but instead behaves as if a
graphics display is enabled, except that it doesn't show one.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-options.hx b/qemu-options.hx
index a3191e6..08a99b5 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -592,7 +592,7 @@
DEF("display", HAS_ARG, QEMU_OPTION_display,
"-display sdl[,frame=on|off][,alt_grab=on|off][,ctrl_grab=on|off]\n"
- " [,window_close=on|off]|curses\n"
+ " [,window_close=on|off]|curses|none\n"
" select display type\n", QEMU_ARCH_ALL)
STEXI
@item -display @var{type}
@@ -609,6 +609,12 @@
curses/ncurses interface. Nothing is displayed when the graphics
device is in graphical mode or if the graphics device does not support
a text mode. Generally only the VGA device models support text mode.
+@item none
+Do not display video output. The guest will still see an emulated
+graphics card, but its output will not be displayed to the QEMU
+user. This option differs from the -nographic option in that it
+only affects what is done with video output; -nographic also changes
+the destination of the serial and parallel port data.
@end table
ETEXI
diff --git a/sysemu.h b/sysemu.h
index 0a83ab9..c43c7af 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -110,6 +110,7 @@
DT_CURSES,
DT_SDL,
DT_NOGRAPHIC,
+ DT_NONE,
} DisplayType;
extern int autostart;
diff --git a/vl.c b/vl.c
index dd026aa..2da2136 100644
--- a/vl.c
+++ b/vl.c
@@ -1618,6 +1618,8 @@
fprintf(stderr, "Curses support is disabled\n");
exit(1);
#endif
+ } else if (strstart(p, "none", &opts)) {
+ display = DT_NONE;
} else {
invalid_display:
fprintf(stderr, "Unknown display type: %s\n", p);
