int ScriptController::Execute()
{
PrepareEnvOptions(nullptr);
PrepareArgs();
m_completed = false;
int exitCode = 0;
#ifdef CHILD_WATCHDOG
bool childConfirmed = false;
while (!childConfirmed && !m_terminated)
{
#endif
int pipein = -1, pipeout = -1;
StartProcess(&pipein, &pipeout);
if (pipein == -1)
{
m_completed = true;
return -1;
}
// open the read end
m_readpipe = fdopen(pipein, "r");
if (!m_readpipe)
{
PrintMessage(Message::mkError, "Could not open read pipe to %s", *m_infoName);
close(pipein);
close(pipeout);
m_completed = true;
return -1;
}
m_writepipe = 0;
if (m_needWrite)
{
// open the write end
m_writepipe = fdopen(pipeout, "w");
if (!m_writepipe)
{
PrintMessage(Message::mkError, "Could not open write pipe to %s", *m_infoName);
close(pipein);
close(pipeout);
m_completed = true;
return -1;
}
}
#ifdef CHILD_WATCHDOG
debug("Creating child watchdog");
ChildWatchDog watchDog;
watchDog.SetAutoDestroy(false);
watchDog.SetProcessId(m_processId);
watchDog.SetInfoName(m_infoName);
watchDog.Start();
#endif
CharBuffer buf(1024 * 10);
debug("Entering pipe-loop");
bool firstLine = true;
bool startError = false;
while (!m_terminated && !m_detached && !feof(m_readpipe))
{
if (ReadLine(buf, buf.Size(), m_readpipe) && m_readpipe)
{
#ifdef CHILD_WATCHDOG
if (!childConfirmed)
{
childConfirmed = true;
watchDog.Stop();
debug("Child confirmed");
continue;
}
#endif
if (firstLine && !strncmp(buf, "[ERROR] Could not start ", 24))
{
startError = true;
}
ProcessOutput(buf);
firstLine = false;
}
}
debug("Exited pipe-loop");
#ifdef CHILD_WATCHDOG
debug("Destroying WatchDog");
if (!childConfirmed)
{
watchDog.Stop();
}
while (watchDog.IsRunning())
{
Util::Sleep(5);
}
#endif
if (m_readpipe)
{
fclose(m_readpipe);
}
if (m_writepipe)
{
fclose(m_writepipe);
}
if (m_terminated && m_infoName)
{
warn("Interrupted %s", *m_infoName);
}
exitCode = 0;
if (!m_detached)
{
exitCode = WaitProcess();
#ifndef WIN32
if (exitCode == FORK_ERROR_EXIT_CODE && startError)
{
exitCode = -1;
}
#endif
}
#ifdef CHILD_WATCHDOG
} // while (!bChildConfirmed && !m_bTerminated)
#endif
debug("Exit code %i", exitCode);
m_completed = true;
return exitCode;
}
int ScriptController::Execute()
{
PrepareEnvOptions(NULL);
PrepareArgs();
int iExitCode = 0;
int pipein;
#ifdef CHILD_WATCHDOG
bool bChildConfirmed = false;
while (!bChildConfirmed && !m_bTerminated)
{
#endif
#ifdef WIN32
// build command line
char* szCmdLine = NULL;
if (m_szArgs)
{
char szCmdLineBuf[2048];
int iUsedLen = 0;
for (const char** szArgPtr = m_szArgs; *szArgPtr; szArgPtr++)
{
snprintf(szCmdLineBuf + iUsedLen, 2048 - iUsedLen, "\"%s\" ", *szArgPtr);
iUsedLen += strlen(*szArgPtr) + 3;
}
szCmdLineBuf[iUsedLen < 2048 ? iUsedLen - 1 : 2048 - 1] = '\0';
szCmdLine = szCmdLineBuf;
}
else
{
szCmdLine = m_szCmdLine;
}
// create pipes to write and read data
HANDLE hReadPipe, hWritePipe;
SECURITY_ATTRIBUTES SecurityAttributes;
memset(&SecurityAttributes, 0, sizeof(SecurityAttributes));
SecurityAttributes.nLength = sizeof(SecurityAttributes);
SecurityAttributes.bInheritHandle = TRUE;
CreatePipe(&hReadPipe, &hWritePipe, &SecurityAttributes, 0);
SetHandleInformation(hReadPipe, HANDLE_FLAG_INHERIT, 0);
STARTUPINFO StartupInfo;
memset(&StartupInfo, 0, sizeof(StartupInfo));
StartupInfo.cb = sizeof(StartupInfo);
StartupInfo.dwFlags = STARTF_USESTDHANDLES;
StartupInfo.hStdInput = 0;
StartupInfo.hStdOutput = hWritePipe;
StartupInfo.hStdError = hWritePipe;
PROCESS_INFORMATION ProcessInfo;
memset(&ProcessInfo, 0, sizeof(ProcessInfo));
char* szEnvironmentStrings = m_environmentStrings.GetStrings();
BOOL bOK = CreateProcess(NULL, szCmdLine, NULL, NULL, TRUE, NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW, szEnvironmentStrings, m_szWorkingDir, &StartupInfo, &ProcessInfo);
if (!bOK)
{
DWORD dwErrCode = GetLastError();
char szErrMsg[255];
szErrMsg[255-1] = '\0';
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, dwErrCode, 0, szErrMsg, 255, NULL))
{
PrintMessage(Message::mkError, "Could not start %s: %s", m_szInfoName, szErrMsg);
}
else
{
PrintMessage(Message::mkError, "Could not start %s: error %i", m_szInfoName, dwErrCode);
}
if (!Util::FileExists(m_szScript))
{
PrintMessage(Message::mkError, "Could not find file %s", m_szScript);
}
free(szEnvironmentStrings);
return -1;
}
free(szEnvironmentStrings);
debug("Child Process-ID: %i", (int)ProcessInfo.dwProcessId);
m_hProcess = ProcessInfo.hProcess;
// close unused "write" end
CloseHandle(hWritePipe);
pipein = _open_osfhandle((intptr_t)hReadPipe, _O_RDONLY);
#else
int p[2];
int pipeout;
// create the pipe
if (pipe(p))
{
PrintMessage(Message::mkError, "Could not open pipe: errno %i", errno);
return -1;
}
char** pEnvironmentStrings = m_environmentStrings.GetStrings();
pipein = p[0];
pipeout = p[1];
debug("forking");
pid_t pid = fork();
if (pid == -1)
{
PrintMessage(Message::mkError, "Could not start %s: errno %i", m_szInfoName, errno);
free(pEnvironmentStrings);
return -1;
}
else if (pid == 0)
{
// here goes the second instance
// create new process group (see Terminate() where it is used)
setsid();
// close up the "read" end
close(pipein);
// make the pipeout to be the same as stdout and stderr
dup2(pipeout, 1);
dup2(pipeout, 2);
close(pipeout);
#ifdef CHILD_WATCHDOG
fwrite("\n", 1, 1, stdout);
fflush(stdout);
#endif
chdir(m_szWorkingDir);
environ = pEnvironmentStrings;
execvp(m_szScript, (char* const*)m_szArgs);
if (errno == EACCES)
{
fprintf(stdout, "[WARNING] Fixing permissions for %s\n", m_szScript);
fflush(stdout);
Util::FixExecPermission(m_szScript);
execvp(m_szScript, (char* const*)m_szArgs);
}
// NOTE: the text "[ERROR] Could not start " is checked later,
// by changing adjust the dependent code below.
fprintf(stdout, "[ERROR] Could not start %s: %s", m_szScript, strerror(errno));
fflush(stdout);
_exit(254);
}
// continue the first instance
debug("forked");
debug("Child Process-ID: %i", (int)pid);
free(pEnvironmentStrings);
m_hProcess = pid;
// close unused "write" end
close(pipeout);
#endif
// open the read end
m_pReadpipe = fdopen(pipein, "r");
if (!m_pReadpipe)
{
PrintMessage(Message::mkError, "Could not open pipe to %s", m_szInfoName);
return -1;
}
#ifdef CHILD_WATCHDOG
debug("Creating child watchdog");
ChildWatchDog* pWatchDog = new ChildWatchDog();
pWatchDog->SetAutoDestroy(false);
pWatchDog->SetProcessID(pid);
pWatchDog->Start();
#endif
char* buf = (char*)malloc(10240);
debug("Entering pipe-loop");
bool bFirstLine = true;
bool bStartError = false;
while (!m_bTerminated && !m_bDetached && !feof(m_pReadpipe))
{
if (ReadLine(buf, 10240, m_pReadpipe) && m_pReadpipe)
{
#ifdef CHILD_WATCHDOG
if (!bChildConfirmed)
{
bChildConfirmed = true;
pWatchDog->Stop();
debug("Child confirmed");
continue;
}
#endif
if (bFirstLine && !strncmp(buf, "[ERROR] Could not start ", 24))
{
bStartError = true;
}
ProcessOutput(buf);
bFirstLine = false;
}
}
debug("Exited pipe-loop");
#ifdef CHILD_WATCHDOG
debug("Destroying WatchDog");
if (!bChildConfirmed)
{
pWatchDog->Stop();
}
while (pWatchDog->IsRunning())
{
usleep(5 * 1000);
}
delete pWatchDog;
#endif
free(buf);
if (m_pReadpipe)
{
fclose(m_pReadpipe);
}
if (m_bTerminated)
{
warn("Interrupted %s", m_szInfoName);
}
iExitCode = 0;
if (!m_bTerminated && !m_bDetached)
{
#ifdef WIN32
WaitForSingleObject(m_hProcess, INFINITE);
DWORD dExitCode = 0;
GetExitCodeProcess(m_hProcess, &dExitCode);
iExitCode = dExitCode;
#else
int iStatus = 0;
waitpid(m_hProcess, &iStatus, 0);
if (WIFEXITED(iStatus))
{
iExitCode = WEXITSTATUS(iStatus);
if (iExitCode == 254 && bStartError)
{
iExitCode = -1;
}
}
#endif
}
#ifdef CHILD_WATCHDOG
} // while (!bChildConfirmed && !m_bTerminated)
#endif
debug("Exit code %i", iExitCode);
return iExitCode;
}