X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Fguestfs.c;h=a3d27620a3d902715d64567c20af86e7f0074adc;hb=fab4298b6361fa62ac649fb885b62cf4ce84ad1b;hp=7cc09cead39a5fb4fc83cfc7dc2f96fb6fdbd441;hpb=cada248a53858341c91f70392e8f5b6e47d9b4fe;p=libguestfs.git

diff --git a/src/guestfs.c b/src/guestfs.c
index 7cc09ce..a3d2762 100644
--- a/src/guestfs.c
+++ b/src/guestfs.c
@@ -1091,15 +1091,28 @@ guestfs__launch (guestfs_h *g)
      */
     g->cmdline[0] = g->qemu;
 
-    snprintf (buf, sizeof buf, "%d", g->memsize);
-    add_cmdline (g, "-m");
-    add_cmdline (g, buf);
+    /* Newer versions of qemu (from around 2009/12) changed the
+     * behaviour of monitors so that an implicit '-monitor stdio' is
+     * assumed if we are in -nographic mode and there is no other
+     * -monitor option.  Only a single stdio device is allowed, so
+     * this broke the '-serial stdio' option.  There is a new flag
+     * called -nodefaults which gets rid of all this default crud, so
+     * let's use that to avoid this and any future surprises.
+     */
+    if (qemu_supports (g, "-nodefaults"))
+      add_cmdline (g, "-nodefaults");
 
-    add_cmdline (g, "-no-reboot"); /* Force exit instead of reboot on panic */
     add_cmdline (g, "-nographic");
     add_cmdline (g, "-serial");
     add_cmdline (g, "stdio");
 
+    snprintf (buf, sizeof buf, "%d", g->memsize);
+    add_cmdline (g, "-m");
+    add_cmdline (g, buf);
+
+    /* Force exit instead of reboot on panic */
+    add_cmdline (g, "-no-reboot");
+
     /* These options recommended by KVM developers to improve reliability. */
     if (qemu_supports (g, "-no-hpet"))
       add_cmdline (g, "-no-hpet");