static kern_return_t
register_bootstrap_service(void)
{
kern_return_t kr;
mach_port_t service_send_port, service_rcv_port;
// Let us attempt to check in.... This routine will look up the service
// by name and attempt to return receive rights to the service port.
kr = bootstrap_check_in(bootstrap_port, (char *)SERVICE_NAME,
&service_rcv_port);
if (kr == KERN_SUCCESS)
server_priv_port = bootstrap_port;
else if (kr == BOOTSTRAP_UNKNOWN_SERVICE) {
// The service does not exist, so let us create it....
kr = bootstrap_create_server(bootstrap_port,
SERVICE_CMD,
getuid(), // server uid
FALSE, // not on-demand
&server_priv_port);
if (kr != KERN_SUCCESS)
return kr;
// We can now use server_priv_port to declare services associated
// with this server by calling bootstrap_create_service() and passing
// server_priv_port as the bootstrap port.
// Create a service called SERVICE_NAME, and return send rights to
// that port in service_send_port.
kr = bootstrap_create_service(server_priv_port, (char *)SERVICE_NAME,
&service_send_port);
if (kr != KERN_SUCCESS) {
mach_port_deallocate(mach_task_self(), server_priv_port);
return kr;
}
// Check in and get receive rights to the service port of the service.
kr = bootstrap_check_in(server_priv_port, (char *)SERVICE_NAME,
&service_rcv_port);
if (kr != KERN_SUCCESS) {
mach_port_deallocate(mach_task_self(), server_priv_port);
mach_port_deallocate(mach_task_self(), service_send_port);
return kr;
}
}
// We are not a Mach port server, so we do not need this port. However,
// we still will have a service with the Bootstrap Server, and so we
// will be relaunched if we exit.
mach_port_destroy(mach_task_self(), service_rcv_port);
return kr;
}
void* AppleCMIODPSampleNewPlugIn(CFAllocatorRef allocator, CFUUIDRef requestedTypeUUID)
{
if (not CFEqual(requestedTypeUUID, kCMIOHardwarePlugInTypeID))
return 0;
try
{
// Before going any further, make sure the SampleAssistant process is registerred with Mach's bootstrap service. Normally, this would be done by having an appropriately
// configured plist in /Library/LaunchDaemons, but if that is done then the process will be owned by root, thus complicating the debugging process. Therefore, in the event that the
// plist is missing (as would be the case for most debugging efforts) attempt to register the SampleAssistant now. It will fail gracefully if allready registered.
mach_port_t assistantServicePort;
name_t assistantServiceName = "com.apple.cmio.DPA.Sample";
kern_return_t err = bootstrap_look_up(bootstrap_port, assistantServiceName, &assistantServicePort);
if (BOOTSTRAP_SUCCESS != err)
{
// Create an URL to SampleAssistant that resides at "/Library/CoreMediaIO/Plug-Ins/DAL/Sample.plugin/Contents/Resources/SampleAssistant"
CACFURL assistantURL(CFURLCreateWithFileSystemPath(NULL, CFSTR("/Library/CoreMediaIO/Plug-Ins/DAL/Sample.plugin/Contents/Resources/SampleAssistant"), kCFURLPOSIXPathStyle, false));
ThrowIf(not assistantURL.IsValid(), CAException(-1), "AppleCMIODPSampleNewPlugIn: unable to create URL for the SampleAssistant");
// Get the maximum size of the of the file system representation of the SampleAssistant's absolute path
CFIndex length = CFStringGetMaximumSizeOfFileSystemRepresentation(CACFString(CFURLCopyFileSystemPath(CACFURL(CFURLCopyAbsoluteURL(assistantURL.GetCFObject())).GetCFObject(), kCFURLPOSIXPathStyle)).GetCFString());
// Get the file system representation
CAAutoFree<char> path(length);
(void) CFURLGetFileSystemRepresentation(assistantURL.GetCFObject(), true, reinterpret_cast<UInt8*>(path.get()), length);
mach_port_t assistantServerPort;
err = bootstrap_create_server(bootstrap_port, path, getuid(), true, &assistantServerPort);
ThrowIf(BOOTSTRAP_SUCCESS != err, CAException(err), "AppleCMIODPSampleNewPlugIn: couldn't create server");
err = bootstrap_check_in(assistantServerPort, assistantServiceName, &assistantServicePort);
// The server port is no longer needed so get rid of it
(void) mach_port_deallocate(mach_task_self(), assistantServerPort);
// Make sure the call to bootstrap_create_service() succeeded
ThrowIf(BOOTSTRAP_SUCCESS != err, CAException(err), "AppleCMIODPSampleNewPlugIn: couldn't create SampleAssistant service port");
}
// The service port is not longer needed so get rid of it
(void) mach_port_deallocate(mach_task_self(), assistantServicePort);
CMIO::DP::Sample::PlugIn* plugIn = new CMIO::DP::Sample::PlugIn(requestedTypeUUID);
plugIn->Retain();
return plugIn->GetInterface();
}
catch (...)
{
return NULL;
}
}
static void regServ(uid_t u, bool on_demand, bool is_kunc, const char *serv_name, const char *serv_cmd)
{
kern_return_t kr;
mach_port_t msr, msv, mhp;
if ((kr = bootstrap_create_server(bootstrap_port, (char*)serv_cmd, u, on_demand, &msr)) != KERN_SUCCESS) {
fprintf(stderr, "%s: bootstrap_create_server(): %d\n", argv0, kr);
return;
}
if ((kr = bootstrap_create_service(msr, (char*)serv_name, &msv)) != KERN_SUCCESS) {
fprintf(stderr, "%s: bootstrap_register(): %d\n", argv0, kr);
return;
}
if (is_kunc) {
mhp = mach_host_self();
if ((kr = host_set_UNDServer(mhp, msv)) != KERN_SUCCESS) {
fprintf(stderr, "%s: host_set_UNDServer(): %s\n", argv0, mach_error_string(kr));
return;
}
mach_port_deallocate(mach_task_self(), mhp);
}
}
