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[libvirt] [PATCH v3 2/4] qemu: rework '-serial none'



Limiting ourselves to qemu without QEMU_CAPS_DEVICE capability, we
used '-serial none' only if there was no serial device defined in the
domain XML.  This means that if we want to have a possibility of the
device being defined in XML, but not used in the command-line
(e.g. when it's pointless), we'll fail to attach '-serial none' to the
command-line (when skipping the device's command-line building and the
device being the only one).

Since there is no such device, this patch doesn't actually do
anything, but enables easier future additions in this manner.

Signed-off-by: Martin Kletzander <mkletzan redhat com>
---
 src/qemu/qemu_command.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 6cc32f9..d8a7951 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1,7 +1,7 @@
 /*
  * qemu_command.c: QEMU command generation
  *
- * Copyright (C) 2006-2013 Red Hat, Inc.
+ * Copyright (C) 2006-2014 Red Hat, Inc.
  * Copyright (C) 2006 Daniel P. Berrange
  *
  * This library is free software; you can redistribute it and/or
@@ -7707,6 +7707,7 @@ qemuBuildCommandLine(virConnectPtr conn,
     int vnc = 0;
     int spice = 0;
     int usbcontroller = 0;
+    int actualSerials = 0;
     bool usblegacy = false;
     bool mlock = false;
     int contOrder[] = {
@@ -8802,11 +8803,7 @@ qemuBuildCommandLine(virConnectPtr conn,
         virCommandAddArgBuffer(cmd, &opt);
     }

-    if (!def->nserials) {
-        /* If we have -device, then we set -nodefault already */
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
-            virCommandAddArgList(cmd, "-serial", "none", NULL);
-    } else {
+    if (def->nserials) {
         for (i = 0; i < def->nserials; i++) {
             virDomainChrDefPtr serial = def->serials[i];
             char *devstr;
@@ -8830,9 +8827,14 @@ qemuBuildCommandLine(virConnectPtr conn,
                 virCommandAddArg(cmd, devstr);
                 VIR_FREE(devstr);
             }
+            actualSerials++;
         }
     }

+    /* If we have -device, then we set -nodefault already */
+    if (!actualSerials && !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
+            virCommandAddArgList(cmd, "-serial", "none", NULL);
+
     if (!def->nparallels) {
         /* If we have -device, then we set -nodefault already */
         if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE))
-- 
1.8.5.4


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