mirror of https://github.com/Icinga/icinga2.git
702 lines
18 KiB
C++
702 lines
18 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "base/process.hpp"
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#include "base/exception.hpp"
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#include "base/convert.hpp"
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#include "base/array.hpp"
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#include "base/objectlock.hpp"
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#include "base/utility.hpp"
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#include "base/initialize.hpp"
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#include "base/logger.hpp"
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#include "base/utility.hpp"
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#include "base/scriptvariable.hpp"
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#include <boost/foreach.hpp>
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#include <boost/algorithm/string/join.hpp>
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#include <boost/thread/once.hpp>
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#ifndef _WIN32
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# include <execvpe.h>
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# include <poll.h>
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# ifndef __APPLE__
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extern char **environ;
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# else /* __APPLE__ */
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# include <crt_externs.h>
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# define environ (*_NSGetEnviron())
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# endif /* __APPLE__ */
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#endif /* _WIN32 */
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using namespace icinga;
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#define IOTHREADS 2
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static boost::mutex l_ProcessMutex[IOTHREADS];
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static std::map<Process::ProcessHandle, Process::Ptr> l_Processes[IOTHREADS];
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#ifdef _WIN32
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static HANDLE l_Events[IOTHREADS];
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#else /* _WIN32 */
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static int l_EventFDs[IOTHREADS][2];
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static std::map<Process::ConsoleHandle, Process::ProcessHandle> l_FDs[IOTHREADS];
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#endif /* _WIN32 */
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static boost::once_flag l_OnceFlag = BOOST_ONCE_INIT;
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INITIALIZE_ONCE(&Process::StaticInitialize);
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Process::Process(const Process::Arguments& arguments, const Dictionary::Ptr& extraEnvironment)
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: m_Arguments(arguments), m_ExtraEnvironment(extraEnvironment), m_Timeout(600)
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{ }
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void Process::StaticInitialize(void)
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{
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for (int tid = 0; tid < IOTHREADS; tid++) {
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#ifdef _WIN32
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l_Events[tid] = CreateEvent(NULL, TRUE, FALSE, NULL);
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#else /* _WIN32 */
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# ifdef HAVE_PIPE2
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if (pipe2(l_EventFDs[tid], O_CLOEXEC) < 0) {
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if (errno == ENOSYS) {
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# endif /* HAVE_PIPE2 */
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if (pipe(l_EventFDs[tid]) < 0) {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("pipe")
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<< boost::errinfo_errno(errno));
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}
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Utility::SetCloExec(l_EventFDs[tid][0]);
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Utility::SetCloExec(l_EventFDs[tid][1]);
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# ifdef HAVE_PIPE2
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} else {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("pipe2")
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<< boost::errinfo_errno(errno));
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}
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}
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# endif /* HAVE_PIPE2 */
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#endif /* _WIN32 */
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}
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}
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void Process::ThreadInitialize(void)
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{
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/* Note to self: Make sure this runs _after_ we've daemonized. */
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for (int tid = 0; tid < IOTHREADS; tid++) {
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boost::thread t(boost::bind(&Process::IOThreadProc, tid));
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t.detach();
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}
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}
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Process::Arguments Process::PrepareCommand(const Value& command)
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{
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#ifdef _WIN32
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String args;
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#else /* _WIN32 */
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std::vector<String> args;
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#endif /* _WIN32 */
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if (command.IsObjectType<Array>()) {
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Array::Ptr arguments = command;
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ObjectLock olock(arguments);
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BOOST_FOREACH(const Value& argument, arguments) {
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#ifdef _WIN32
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if (args != "")
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args += " ";
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args += Utility::EscapeShellArg(argument);
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#else /* _WIN32 */
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args.push_back(argument);
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#endif /* _WIN32 */
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}
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return args;
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}
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#ifdef _WIN32
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return command;
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#else /* _WIN32 */
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args.push_back("sh");
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args.push_back("-c");
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args.push_back(command);
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return args;
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#endif
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}
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void Process::SetTimeout(double timeout)
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{
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m_Timeout = timeout;
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}
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double Process::GetTimeout(void) const
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{
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return m_Timeout;
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}
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void Process::IOThreadProc(int tid)
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{
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#ifdef _WIN32
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HANDLE *handles = NULL;
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#else /* _WIN32 */
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pollfd *pfds = NULL;
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#endif /* _WIN32 */
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int count = 0;
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double now;
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Utility::SetThreadName("ProcessIO");
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for (;;) {
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double timeout = -1;
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now = Utility::GetTime();
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{
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boost::mutex::scoped_lock lock(l_ProcessMutex[tid]);
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count = 1 + l_Processes[tid].size();
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#ifdef _WIN32
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handles = reinterpret_cast<HANDLE *>(realloc(handles, sizeof(HANDLE) * count));
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handles[0] = l_Events[tid];
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#else /* _WIN32 */
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pfds = reinterpret_cast<pollfd *>(realloc(pfds, sizeof(pollfd) * count));
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pfds[0].fd = l_EventFDs[tid][0];
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pfds[0].events = POLLIN;
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pfds[0].revents = 0;
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#endif /* _WIN32 */
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int i = 1;
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std::pair<ProcessHandle, Process::Ptr> kv;
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BOOST_FOREACH(kv, l_Processes[tid]) {
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#ifdef _WIN32
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handles[i] = kv.first;
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#else /* _WIN32 */
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pfds[i].fd = kv.second->m_FD;
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pfds[i].events = POLLIN;
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pfds[i].revents = 0;
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#endif /* _WIN32 */
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if (kv.second->m_Timeout != 0) {
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double delta = kv.second->m_Timeout - (now - kv.second->m_Result.ExecutionStart);
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if (timeout == -1 || delta < timeout)
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timeout = delta;
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}
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i++;
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}
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}
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if (timeout < 0.01)
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timeout = 0.5;
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timeout *= 1000;
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#ifdef _WIN32
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DWORD rc = WaitForMultipleObjects(count, handles, FALSE, timeout == -1 ? INFINITE : static_cast<DWORD>(timeout));
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#else /* _WIN32 */
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int rc = poll(pfds, count, timeout);
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if (rc < 0)
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continue;
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#endif /* _WIN32 */
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now = Utility::GetTime();
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{
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boost::mutex::scoped_lock lock(l_ProcessMutex[tid]);
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#ifdef _WIN32
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if (rc == WAIT_OBJECT_0)
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ResetEvent(l_Events[tid]);
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#else /* _WIN32 */
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if (pfds[0].revents & (POLLIN | POLLHUP | POLLERR)) {
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char buffer[512];
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if (read(l_EventFDs[tid][0], buffer, sizeof(buffer)) < 0)
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Log(LogCritical, "base", "Read from event FD failed.");
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}
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#endif /* _WIN32 */
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for (int i = 1; i < count; i++) {
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std::map<ProcessHandle, Process::Ptr>::iterator it;
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#ifdef _WIN32
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it = l_Processes[tid].find(handles[i]);
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#else /* _WIN32 */
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std::map<ConsoleHandle, ProcessHandle>::iterator it2;
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it2 = l_FDs[tid].find(pfds[i].fd);
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if (it2 == l_FDs[tid].end())
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continue; /* This should never happen. */
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it = l_Processes[tid].find(it2->second);
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#endif /* _WIN32 */
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if (it == l_Processes[tid].end())
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continue; /* This should never happen. */
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bool is_timeout = false;
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if (it->second->m_Timeout != 0) {
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double timeout = it->second->m_Result.ExecutionStart + it->second->m_Timeout;
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if (timeout < now)
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is_timeout = true;
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}
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#ifdef _WIN32
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if (rc == WAIT_OBJECT_0 + i || is_timeout) {
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#else /* _WIN32 */
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if (pfds[i].revents & (POLLIN | POLLHUP | POLLERR) || is_timeout) {
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#endif /* _WIN32 */
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if (!it->second->DoEvents()) {
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#ifdef _WIN32
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CloseHandle(it->first);
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CloseHandle(it->second->m_FD);
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#else /* _WIN32 */
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l_FDs[tid].erase(it->second->m_FD);
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(void)close(it->second->m_FD);
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#endif /* _WIN32 */
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l_Processes[tid].erase(it);
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}
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}
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}
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}
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}
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}
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String Process::PrettyPrintArguments(const Process::Arguments& arguments)
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{
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#ifdef _WIN32
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return "'" + arguments + "'";
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#else /* _WIN32 */
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return "'" + boost::algorithm::join(arguments, "' '") + "'";
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#endif /* _WIN32 */
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}
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void Process::Run(const boost::function<void(const ProcessResult&)>& callback)
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{
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boost::call_once(l_OnceFlag, &Process::ThreadInitialize);
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m_Result.ExecutionStart = Utility::GetTime();
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#ifdef _WIN32
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SECURITY_ATTRIBUTES sa = {};
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sa.nLength = sizeof(sa);
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sa.bInheritHandle = TRUE;
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HANDLE outReadPipe, outWritePipe;
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if (!CreatePipe(&outReadPipe, &outWritePipe, &sa, 0))
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("CreatePipe")
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<< errinfo_win32_error(GetLastError()));
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if (!SetHandleInformation(outReadPipe, HANDLE_FLAG_INHERIT, 0))
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("SetHandleInformation")
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<< errinfo_win32_error(GetLastError()));
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HANDLE outWritePipeDup;
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if (!DuplicateHandle(GetCurrentProcess(), outWritePipe, GetCurrentProcess(),
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&outWritePipeDup, 0, TRUE, DUPLICATE_SAME_ACCESS))
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("DuplicateHandle")
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<< errinfo_win32_error(GetLastError()));
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LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList;
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SIZE_T cbSize;
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if (!InitializeProcThreadAttributeList(NULL, 1, 0, &cbSize) && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("InitializeProcThreadAttributeList")
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<< errinfo_win32_error(GetLastError()));
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lpAttributeList = reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(new char[cbSize]);
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if (!InitializeProcThreadAttributeList(lpAttributeList, 1, 0, &cbSize))
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("InitializeProcThreadAttributeList")
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<< errinfo_win32_error(GetLastError()));
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HANDLE rgHandles[3];
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rgHandles[0] = outWritePipe;
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rgHandles[1] = outWritePipeDup;
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rgHandles[2] = GetStdHandle(STD_INPUT_HANDLE);
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if (!UpdateProcThreadAttribute(lpAttributeList, 0, PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
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rgHandles, sizeof(rgHandles), NULL, NULL))
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("UpdateProcThreadAttribute")
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<< errinfo_win32_error(GetLastError()));
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STARTUPINFOEX si = {};
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si.StartupInfo.cb = sizeof(si);
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si.StartupInfo.hStdError = outWritePipe;
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si.StartupInfo.hStdOutput = outWritePipeDup;
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si.StartupInfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
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si.StartupInfo.dwFlags = STARTF_USESTDHANDLES;
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si.lpAttributeList = lpAttributeList;
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PROCESS_INFORMATION pi;
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char *args = new char[m_Arguments.GetLength() + 1];
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strncpy(args, m_Arguments.CStr(), m_Arguments.GetLength() + 1);
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args[m_Arguments.GetLength()] = '\0';
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LPCH pEnvironment = GetEnvironmentStrings();
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size_t ioffset = 0, offset = 0;
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char *envp = NULL;
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for (;;) {
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size_t len = strlen(pEnvironment + ioffset);
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if (len == 0)
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break;
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char *eqp = strchr(pEnvironment + ioffset, '=');
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if (eqp && m_ExtraEnvironment && m_ExtraEnvironment->Contains(String(pEnvironment + ioffset, eqp))) {
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ioffset += len + 1;
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continue;
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}
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envp = static_cast<char *>(realloc(envp, offset + len + 1));
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if (envp == NULL)
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BOOST_THROW_EXCEPTION(std::bad_alloc());
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strcpy(envp + offset, pEnvironment + ioffset);
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offset += len + 1;
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ioffset += len + 1;
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}
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FreeEnvironmentStrings(pEnvironment);
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if (m_ExtraEnvironment) {
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ObjectLock olock(m_ExtraEnvironment);
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BOOST_FOREACH(const Dictionary::Pair& kv, m_ExtraEnvironment) {
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String skv = kv.first + "=" + Convert::ToString(kv.second);
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envp = static_cast<char *>(realloc(envp, offset + skv.GetLength() + 1));
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if (envp == NULL)
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BOOST_THROW_EXCEPTION(std::bad_alloc());
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strcpy(envp + offset, skv.CStr());
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offset += skv.GetLength() + 1;
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}
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}
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envp = static_cast<char *>(realloc(envp, offset + 1));
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if (envp == NULL)
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BOOST_THROW_EXCEPTION(std::bad_alloc());
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envp[offset] = '\0';
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if (!CreateProcess(NULL, args, NULL, NULL, TRUE,
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EXTENDED_STARTUPINFO_PRESENT, envp, NULL, &si.StartupInfo, &pi)) {
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CloseHandle(outWritePipe);
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CloseHandle(outWritePipeDup);
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delete args;
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free(envp);
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DeleteProcThreadAttributeList(lpAttributeList);
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delete [] reinterpret_cast<char *>(lpAttributeList);
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BOOST_THROW_EXCEPTION(win32_error()
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<< boost::errinfo_api_function("CreateProcess")
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<< errinfo_win32_error(GetLastError()));
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}
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delete args;
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free(envp);
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DeleteProcThreadAttributeList(lpAttributeList);
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delete[] reinterpret_cast<char *>(lpAttributeList);
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CloseHandle(outWritePipe);
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CloseHandle(outWritePipeDup);
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CloseHandle(pi.hThread);
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m_Process = pi.hProcess;
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m_FD = outReadPipe;
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m_PID = pi.dwProcessId;
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Log(LogNotice, "Process")
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<< "Running command " << PrettyPrintArguments(m_Arguments) << ": PID " << m_PID;
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#else /* _WIN32 */
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int fds[2];
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#ifdef HAVE_PIPE2
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if (pipe2(fds, O_CLOEXEC) < 0) {
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if (errno == ENOSYS) {
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#endif /* HAVE_PIPE2 */
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if (pipe(fds) < 0) {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("pipe")
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<< boost::errinfo_errno(errno));
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}
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Utility::SetCloExec(fds[0]);
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Utility::SetCloExec(fds[1]);
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#ifdef HAVE_PIPE2
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} else {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("pipe2")
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<< boost::errinfo_errno(errno));
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}
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}
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#endif /* HAVE_PIPE2 */
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// build argv
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char **argv = new char *[m_Arguments.size() + 1];
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for (unsigned int i = 0; i < m_Arguments.size(); i++)
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argv[i] = strdup(m_Arguments[i].CStr());
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argv[m_Arguments.size()] = NULL;
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// build envp
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int envc = 0;
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/* count existing environment variables */
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while (environ[envc] != NULL)
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envc++;
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char **envp = new char *[envc + (m_ExtraEnvironment ? m_ExtraEnvironment->GetLength() : 0) + 1];
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for (int i = 0; i < envc; i++)
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envp[i] = strdup(environ[i]);
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if (m_ExtraEnvironment) {
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ObjectLock olock(m_ExtraEnvironment);
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int index = envc;
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BOOST_FOREACH(const Dictionary::Pair& kv, m_ExtraEnvironment) {
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String skv = kv.first + "=" + Convert::ToString(kv.second);
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envp[index] = strdup(skv.CStr());
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index++;
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}
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}
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envp[envc + (m_ExtraEnvironment ? m_ExtraEnvironment->GetLength() : 0)] = NULL;
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m_ExtraEnvironment.reset();
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#ifdef HAVE_VFORK
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Value use_vfork = ScriptVariable::Get("UseVfork");
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if (use_vfork.IsEmpty() || static_cast<bool>(use_vfork))
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m_Process = vfork();
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else
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m_Process = fork();
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#else /* HAVE_VFORK */
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m_Process = fork();
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#endif /* HAVE_VFORK */
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if (m_Process < 0) {
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("fork")
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<< boost::errinfo_errno(errno));
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}
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if (m_Process == 0) {
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// child process
|
|
|
|
if (dup2(fds[1], STDOUT_FILENO) < 0 || dup2(fds[1], STDERR_FILENO) < 0) {
|
|
perror("dup2() failed");
|
|
_exit(128);
|
|
}
|
|
|
|
(void)close(fds[0]);
|
|
(void)close(fds[1]);
|
|
|
|
#ifdef HAVE_NICE
|
|
if (nice(5) < 0)
|
|
Log(LogWarning, "base", "Failed to renice child process.");
|
|
#endif /* HAVE_NICE */
|
|
|
|
if (icinga2_execvpe(argv[0], argv, envp) < 0) {
|
|
char errmsg[512];
|
|
strcpy(errmsg, "execvpe(");
|
|
strncat(errmsg, argv[0], sizeof(errmsg) - 1);
|
|
strncat(errmsg, ") failed", sizeof(errmsg) - 1);
|
|
errmsg[sizeof(errmsg) - 1] = '\0';
|
|
perror(errmsg);
|
|
_exit(128);
|
|
}
|
|
|
|
_exit(128);
|
|
}
|
|
|
|
// parent process
|
|
|
|
m_PID = m_Process;
|
|
|
|
Log(LogNotice, "Process")
|
|
<< "Running command " << PrettyPrintArguments(m_Arguments) <<": PID " << m_PID;
|
|
|
|
// free arguments
|
|
for (int i = 0; argv[i] != NULL; i++)
|
|
free(argv[i]);
|
|
|
|
delete[] argv;
|
|
|
|
// free environment
|
|
for (int i = 0; envp[i] != NULL; i++)
|
|
free(envp[i]);
|
|
|
|
delete[] envp;
|
|
|
|
(void)close(fds[1]);
|
|
|
|
Utility::SetNonBlocking(fds[0]);
|
|
|
|
m_FD = fds[0];
|
|
#endif /* _WIN32 */
|
|
|
|
m_Callback = callback;
|
|
|
|
int tid = GetTID();
|
|
|
|
{
|
|
boost::mutex::scoped_lock lock(l_ProcessMutex[tid]);
|
|
l_Processes[tid][m_Process] = GetSelf();
|
|
#ifndef _WIN32
|
|
l_FDs[tid][m_FD] = m_Process;
|
|
#endif /* _WIN32 */
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
SetEvent(l_Events[tid]);
|
|
#else /* _WIN32 */
|
|
if (write(l_EventFDs[tid][1], "T", 1) < 0 && errno != EINTR && errno != EAGAIN)
|
|
Log(LogCritical, "base", "Write to event FD failed.");
|
|
#endif /* _WIN32 */
|
|
}
|
|
|
|
bool Process::DoEvents(void)
|
|
{
|
|
bool is_timeout = false;
|
|
|
|
if (m_Timeout != 0) {
|
|
double timeout = m_Result.ExecutionStart + m_Timeout;
|
|
|
|
if (timeout < Utility::GetTime()) {
|
|
Log(LogWarning, "Process")
|
|
<< "Killing process " << m_PID << " (" << PrettyPrintArguments(m_Arguments)
|
|
<< ") after timeout of " << m_Timeout << " seconds";
|
|
|
|
m_OutputStream << "<Timeout exceeded.>";
|
|
#ifdef _WIN32
|
|
TerminateProcess(m_Process, 1);
|
|
#else /* _WIN32 */
|
|
kill(m_Process, SIGKILL);
|
|
#endif /* _WIN32 */
|
|
|
|
is_timeout = true;
|
|
}
|
|
}
|
|
|
|
if (!is_timeout) {
|
|
char buffer[512];
|
|
for (;;) {
|
|
#ifdef _WIN32
|
|
DWORD rc;
|
|
if (!ReadFile(m_FD, buffer, sizeof(buffer), &rc, NULL) || rc == 0)
|
|
break;
|
|
#else /* _WIN32 */
|
|
int rc = read(m_FD, buffer, sizeof(buffer));
|
|
|
|
if (rc < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))
|
|
return true;
|
|
|
|
if (rc > 0) {
|
|
#endif /* _WIN32 */
|
|
m_OutputStream.write(buffer, rc);
|
|
#ifdef _WIN32
|
|
return true;
|
|
#else /* _WIN32 */
|
|
continue;
|
|
}
|
|
#endif /* _WIN32 */
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
String output = m_OutputStream.str();
|
|
|
|
#ifdef _WIN32
|
|
WaitForSingleObject(m_Process, INFINITE);
|
|
|
|
DWORD exitcode;
|
|
GetExitCodeProcess(m_Process, &exitcode);
|
|
|
|
Log(LogNotice, "Process")
|
|
<< "PID " << m_PID << " (" << PrettyPrintArguments(m_Arguments) << ") terminated with exit code " << exitcode;
|
|
#else /* _WIN32 */
|
|
int status, exitcode;
|
|
if (waitpid(m_Process, &status, 0) != m_Process) {
|
|
BOOST_THROW_EXCEPTION(posix_error()
|
|
<< boost::errinfo_api_function("waitpid")
|
|
<< boost::errinfo_errno(errno));
|
|
}
|
|
|
|
if (WIFEXITED(status)) {
|
|
exitcode = WEXITSTATUS(status);
|
|
|
|
Log(LogNotice, "Process")
|
|
<< "PID " << m_PID << " (" << PrettyPrintArguments(m_Arguments) << ") terminated with exit code " << exitcode;
|
|
} else if (WIFSIGNALED(status)) {
|
|
Log(LogWarning, "Process")
|
|
<< "PID " << m_PID << " was terminated by signal " << WTERMSIG(status);
|
|
|
|
std::ostringstream outputbuf;
|
|
outputbuf << "<Terminated by signal " << WTERMSIG(status) << ".>";
|
|
output = output + outputbuf.str();
|
|
exitcode = 128;
|
|
} else {
|
|
exitcode = 128;
|
|
}
|
|
#endif /* _WIN32 */
|
|
|
|
m_Result.PID = m_PID;
|
|
m_Result.ExecutionEnd = Utility::GetTime();
|
|
m_Result.ExitStatus = exitcode;
|
|
m_Result.Output = output;
|
|
|
|
if (m_Callback)
|
|
Utility::QueueAsyncCallback(boost::bind(m_Callback, m_Result));
|
|
|
|
return false;
|
|
}
|
|
|
|
pid_t Process::GetPID(void) const
|
|
{
|
|
return m_PID;
|
|
}
|
|
|
|
|
|
int Process::GetTID(void) const
|
|
{
|
|
return (reinterpret_cast<uintptr_t>(this) / sizeof(void *)) % IOTHREADS;
|
|
}
|
|
|