mirror of
https://github.com/clementine-player/Clementine
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146 lines
5.3 KiB
Plaintext
146 lines
5.3 KiB
Plaintext
// Copyright (c) 2007, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import "OnDemandServer.h"
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#if DEBUG
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#define PRINT_MACH_RESULT(result_, message_) \
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printf(message_"%s (%d)\n", mach_error_string(result_), result_ );
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#else
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#define PRINT_MACH_RESULT(result_, message_)
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#endif
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//==============================================================================
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OnDemandServer *OnDemandServer::Create(const char *server_command,
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const char *service_name,
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bool unregister_on_cleanup,
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kern_return_t *out_result) {
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OnDemandServer *server = new OnDemandServer();
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if (!server) return NULL;
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kern_return_t result = server->Initialize(server_command,
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service_name,
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unregister_on_cleanup);
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if (out_result) {
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*out_result = result;
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}
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if (result == KERN_SUCCESS) {
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return server;
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}
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delete server;
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return NULL;
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};
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//==============================================================================
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kern_return_t OnDemandServer::Initialize(const char *server_command,
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const char *service_name,
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bool unregister_on_cleanup) {
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unregister_on_cleanup_ = unregister_on_cleanup;
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kern_return_t kr =
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bootstrap_create_server(bootstrap_port,
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const_cast<char*>(server_command),
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geteuid(), // server uid
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true,
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&server_port_);
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if (kr != KERN_SUCCESS) {
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PRINT_MACH_RESULT(kr, "bootstrap_create_server() : ");
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return kr;
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}
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strlcpy(service_name_, service_name, sizeof(service_name_));
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// Create a service called service_name, and return send rights to
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// that port in service_port_.
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kr = bootstrap_create_service(server_port_,
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const_cast<char*>(service_name),
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&service_port_);
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if (kr != KERN_SUCCESS) {
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PRINT_MACH_RESULT(kr, "bootstrap_create_service() : ");
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// perhaps the service has already been created - try to look it up
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kr = bootstrap_look_up(bootstrap_port, (char*)service_name, &service_port_);
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if (kr != KERN_SUCCESS) {
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PRINT_MACH_RESULT(kr, "bootstrap_look_up() : ");
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Unregister(); // clean up server port
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return kr;
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}
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}
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return KERN_SUCCESS;
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}
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//==============================================================================
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OnDemandServer::~OnDemandServer() {
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if (unregister_on_cleanup_) {
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Unregister();
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}
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}
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//==============================================================================
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void OnDemandServer::LaunchOnDemand() {
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// We need to do this, since the launched server is another process
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// and holding on to this port delays launching until the current process
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// exits!
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mach_port_deallocate(mach_task_self(), server_port_);
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server_port_ = MACH_PORT_DEAD;
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// Now, the service is still registered and all we need to do is send
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// a mach message to the service port in order to launch the server.
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}
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//==============================================================================
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void OnDemandServer::Unregister() {
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if (service_port_ != MACH_PORT_NULL) {
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mach_port_deallocate(mach_task_self(), service_port_);
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service_port_ = MACH_PORT_NULL;
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}
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if (server_port_ != MACH_PORT_NULL) {
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// unregister the service
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kern_return_t kr = bootstrap_register(server_port_,
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service_name_,
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MACH_PORT_NULL);
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if (kr != KERN_SUCCESS) {
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PRINT_MACH_RESULT(kr, "Breakpad UNREGISTER : bootstrap_register() : ");
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}
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mach_port_deallocate(mach_task_self(), server_port_);
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server_port_ = MACH_PORT_NULL;
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}
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}
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