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>
This commit is contained in:
Jes Sorensen 2011-03-16 13:33:32 +01:00 committed by Anthony Liguori
parent 1472a95bab
commit 4171d32e6e
3 changed files with 10 additions and 1 deletions

View file

@ -592,7 +592,7 @@ ETEXI
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 @@ support a text mode, QEMU can display this output using a
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

View file

@ -110,6 +110,7 @@ typedef enum DisplayType
DT_CURSES,
DT_SDL,
DT_NOGRAPHIC,
DT_NONE,
} DisplayType;
extern int autostart;

2
vl.c
View file

@ -1618,6 +1618,8 @@ static DisplayType select_display(const char *p)
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);