private static void SetXenBusDevUsedOnFirstRun(
RegistryKey openRegKey)
// Keeps the XenBus device that was used on
// the Install Agent's first run
{
string regValName = "XenBusDevUsedOnFirstRun";
try
{
xenBusDev = (XenBus.Devs)Enum.Parse(
typeof(XenBus.Devs),
(string)openRegKey.GetValue(regValName),
true
);
}
catch (ArgumentNullException)
// <value> does not exist; first run of Install Agent
{
string tmp = "";
foreach (XenBus.Devs tmpXenBus in
Enum.GetValues(typeof(XenBus.Devs)))
{
if (!XenBus.IsPresent(tmpXenBus, true) ||
!XenBus.HasChildren(tmpXenBus))
{
continue;
}
tmp = tmpXenBus.ToString();
xenBusDev = tmpXenBus;
break;
}
if (String.IsNullOrEmpty(tmp))
{
xenBusDev = (XenBus.Devs) 0;
}
openRegKey.SetValue(
regValName,
tmp,
RegistryValueKind.String
);
}
catch (ArgumentException)
// <value> exists, but is empty =>
// no XenBus dev used =>
// no PV drivers installed
{
xenBusDev = (XenBus.Devs) 0;
}
}
// Keeps the XenBus device that was used on
// the Install Agent's first run
private static void SetXenBusDevUsedOnFirstRun(
RegistryKey openRegKey)
{
string regValName = "XenBusDevUsedOnFirstRun";
try
{
xenBusDev = (XenBus.Devs)Enum.Parse(
typeof(XenBus.Devs),
(string)openRegKey.GetValue(regValName),
true
);
}
catch (ArgumentNullException)
// <value> does not exist; first run of Install Agent
{
string tmp = "";
foreach (XenBus.Devs tmpXenBus in
Enum.GetValues(typeof(XenBus.Devs)))
{
if (!XenBus.IsPresent(tmpXenBus, true) ||
!XenBus.HasChildren(tmpXenBus))
{
continue;
}
tmp = tmpXenBus.ToString();
xenBusDev = tmpXenBus;
break;
}
if (String.IsNullOrEmpty(tmp))
{
xenBusDev = (XenBus.Devs)0;
}
openRegKey.SetValue(
regValName,
tmp,
RegistryValueKind.String
);
}
catch (ArgumentException)
// <value> exists, but is empty =>
// no XenBus dev used =>
// no PV drivers installed
{
xenBusDev = (XenBus.Devs)0;
}
}
