[libvirt] [PATCH] Report error when parsing character device target type

[Jim Fehlig]

No useful error was being reported when an invalid character device
target type is specified in the domainXML. E.g.

    ...
    <console type="pty">
      <source path="/dev/pts/2"/>
      <target type="kvm" port="0"/>
    </console>
    ...

resulted in

error: Failed to define domain from x.xml
error: An error occurred, but the cause is unknown

With this small patch, the error is more helpful

error: Failed to define domain from x.xml
error: XML error: unknown target type 'kvm' specified for character device
---
 src/conf/domain_conf.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 976e42b..54ac1db 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -4895,6 +4895,9 @@ virDomainChrDefParseTargetXML(virCapsPtr caps,
     if ((def->targetType =
          virDomainChrTargetTypeFromString(caps, vmdef,
                                           def->deviceType, targetType)) < 0) {
+        virDomainReportError(VIR_ERR_XML_ERROR,
+                             _("unknown target type '%s' specified for character device"),
+                             targetType);
         goto error;
     }
 
-- 
1.7.8.3