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Diffstat (limited to 'qpid/cpp/src/tests/ForkedBroker.cpp')
| -rw-r--r-- | qpid/cpp/src/tests/ForkedBroker.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/qpid/cpp/src/tests/ForkedBroker.cpp b/qpid/cpp/src/tests/ForkedBroker.cpp new file mode 100644 index 0000000000..53eaa7e1ce --- /dev/null +++ b/qpid/cpp/src/tests/ForkedBroker.cpp @@ -0,0 +1,158 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ + +#include "ForkedBroker.h" +#include "qpid/log/Statement.h" +#include <boost/bind.hpp> +#include <algorithm> +#include <stdlib.h> +#include <sys/types.h> +#include <signal.h> + +using namespace std; +using qpid::ErrnoException; + +namespace std { +static ostream& operator<<(ostream& o, const qpid::tests::ForkedBroker::Args& a) { +copy(a.begin(), a.end(), ostream_iterator<string>(o, " ")); +return o; +} +} + +namespace qpid { +namespace tests { + +ForkedBroker::ForkedBroker(const Args& constArgs) : running(false), exitStatus(0) { + Args args(constArgs); + // Substitute the special value "TMP_DATA_DIR" with a temporary data dir. + Args::iterator i = find(args.begin(), args.end(), string("TMP_DATA_DIR")); + if (i != args.end()) { + args.erase(i); + char dd[] = "/tmp/ForkedBroker.XXXXXX"; + if (!mkdtemp(dd)) + throw qpid::ErrnoException("Can't create data dir"); + dataDir = dd; + args.push_back("--data-dir"); + args.push_back(dataDir); + } + // Never use the default data directory, set --no-data-dir if no other data-dir arg. + Args::iterator j = find(args.begin(), args.end(), string("--data-dir")); + Args::iterator k = find(args.begin(), args.end(), string("--no-data-dir")); + if (j == args.end() && k == args.end()) + args.push_back("--no-data-dir"); + init(args); +} + +ForkedBroker::~ForkedBroker() { + try { kill(); } + catch (const std::exception& e) { + QPID_LOG(error, QPID_MSG("Killing forked broker: " << e.what())); + } + if (!dataDir.empty()) + { + int unused_ret; // Suppress warnings about ignoring return value. + unused_ret = ::system(("rm -rf "+dataDir).c_str()); + } +} + +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))); + running = false; + exitStatus = status; +} + +bool isLogOption(const std::string& s) { + const char * log_enable = "--log-enable", + * trace = "--trace"; + return( (! strncmp(s.c_str(), log_enable, strlen(log_enable))) || + (! strncmp(s.c_str(), trace, strlen(trace))) + ); +} + +namespace { + void ignore_signal(int) + { + } +} + +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); + } +} + +}} // namespace qpid::tests |