void ForkedBroker::kill(int sig) {
if (pid == 0) return;
int savePid = pid;
pid = 0; // Reset pid here in case of an exception.
using qpid::ErrnoException;
if (::kill(savePid, sig) < 0)
throw ErrnoException("kill failed");
int status;
if (::waitpid(savePid, &status, 0) < 0 && sig != 9)
throw ErrnoException("wait for forked process failed");
if (WEXITSTATUS(status) != 0 && sig != 9)
throw qpid::Exception(QPID_MSG("Forked broker exited with: " << WEXITSTATUS(status)));
}
void ForkedBroker::init(const Args& userArgs) {
using qpid::ErrnoException;
port = 0;
int pipeFds[2];
if(::pipe(pipeFds) < 0) throw ErrnoException("Can't create pipe");
// Ignore the SIGCHLD signal generated by an exitting child
// We will clean up any exitting children in the waitpid above
// This should really be neater (like only once not per fork)
struct ::sigaction sa;
sa.sa_handler = ignore_signal;
::sigemptyset(&sa.sa_mask);
::sigaddset(&sa.sa_mask, SIGCHLD);
sa.sa_flags = SA_NOCLDSTOP | SA_RESTART;
::sigaction(SIGCHLD, &sa, 0);
pid = ::fork();
if (pid < 0) throw ErrnoException("Fork failed");
if (pid) { // parent
::close(pipeFds[1]);
FILE* f = ::fdopen(pipeFds[0], "r");
if (!f) throw ErrnoException("fopen failed");
if (::fscanf(f, "%d", &port) != 1) {
if (ferror(f)) throw ErrnoException("Error reading port number from child.");
else throw qpid::Exception("EOF reading port number from child.");
}
::fclose(f);
running = true;
}
else { // child
::close(pipeFds[0]);
int fd = ::dup2(pipeFds[1], 1); // pipe stdout to the parent.
if (fd < 0) throw ErrnoException("dup2 failed");
const char* prog = ::getenv("QPIDD_EXEC");
if (!prog) prog = "../qpidd"; // This only works from within svn checkout
Args args(userArgs);
args.push_back("--port=0");
// Keep quiet except for errors.
if (!::getenv("QPID_TRACE") && !::getenv("QPID_LOG_ENABLE")
&& find_if(userArgs.begin(), userArgs.end(), isLogOption) == userArgs.end())
args.push_back("--log-enable=error+");
std::vector<const char*> argv(args.size());
std::transform(args.begin(), args.end(), argv.begin(), boost::bind(&std::string::c_str, _1));
argv.push_back(0);
QPID_LOG(debug, "ForkedBroker exec " << prog << ": " << args);
execv(prog, const_cast<char* const*>(&argv[0]));
QPID_LOG(critical, "execv failed to start broker: prog=\"" << prog << "\"; args=\"" << args << "\"; errno=" << errno << " (" << std::strerror(errno) << ")");
::exit(1);
}
}
DtxWorkRecord* DtxManager::getWork(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i == work.end()) {
throw NotFoundException(QPID_MSG("Unrecognised xid " << convert(xid)));
}
return ptr_map_ptr(i);
}
DtxWorkRecord* DtxManager::createWork(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i != work.end()) {
throw NotAllowedException(QPID_MSG("Xid " << convert(xid) << " is already known (use 'join' to add work to an existing xid)"));
} else {
std::string ncxid = xid; // Work around const correctness problems in ptr_map.
return ptr_map_ptr(work.insert(ncxid, new DtxWorkRecord(ncxid, store)).first);
}
}
void DtxManager::timedout(const std::string& xid)
{
Mutex::ScopedLock locker(lock);
WorkMap::iterator i = work.find(xid);
if (i == work.end()) {
QPID_LOG(warning, "Transaction timeout failed: no record for xid");
} else {
ptr_map_ptr(i)->timedout();
//TODO: do we want to have a timed task to cleanup, or can we rely on an explicit completion?
//timer->add(new DtxCleanup(60*30/*30 mins*/, boost::bind(&DtxManager::remove, this, xid)));
}
}
void ForkedBroker::init(const Args& userArgs) {
using qpid::ErrnoException;
port = 0;
int pipeFds[2];
if(::pipe(pipeFds) < 0) throw ErrnoException("Can't create pipe");
pid = ::fork();
if (pid < 0) throw ErrnoException("Fork failed");
if (pid) { // parent
::close(pipeFds[1]);
FILE* f = ::fdopen(pipeFds[0], "r");
if (!f) throw ErrnoException("fopen failed");
if (::fscanf(f, "%d", &port) != 1) {
if (ferror(f)) throw ErrnoException("Error reading port number from child.");
else throw qpid::Exception("EOF reading port number from child.");
}
::close(pipeFds[0]);
}
else { // child
::close(pipeFds[0]);
int fd = ::dup2(pipeFds[1], 1); // pipe stdout to the parent.
if (fd < 0) throw ErrnoException("dup2 failed");
const char* prog = ::getenv("QPIDD_EXEC");
if (!prog) prog = "../qpidd"; // This only works from within svn checkout
Args args(userArgs);
args.push_back("--port=0");
// Keep quiet except for errors.
if (!::getenv("QPID_TRACE") && !::getenv("QPID_LOG_ENABLE")
&& find_if(userArgs.begin(), userArgs.end(), isLogOption) == userArgs.end())
args.push_back("--log-enable=error+");
std::vector<const char*> argv(args.size());
std::transform(args.begin(), args.end(), argv.begin(), boost::bind(&std::string::c_str, _1));
argv.push_back(0);
QPID_LOG(debug, "ForkedBroker exec " << prog << ": " << args);
execv(prog, const_cast<char* const*>(&argv[0]));
QPID_LOG(critical, "execv failed to start broker: prog=\"" << prog << "\"; args=\"" << args << "\"; errno=" << errno << " (" << std::strerror(errno) << ")");
::exit(1);
}
}
