void MetaProcessor::MaybeRedirectOutputRAII::pop() {
if (m_isCurrentlyRedirecting & kSTDOUT) {
unredirect(m_MetaProcessor->m_backupFDStdout, STDOUT_FILENO, stdout);
}
if (m_isCurrentlyRedirecting & kSTDERR) {
unredirect(m_MetaProcessor->m_backupFDStderr, STDERR_FILENO, stderr);
}
}
void MetaProcessor::MaybeRedirectOutputRAII::pop() {
//If we have only one redirection RAII
//only then do the unredirection.
if (m_MetaProcessor->getRedirectionRAIILevel() != 1)
return;
if (m_isCurrentlyRedirecting & kSTDOUT) {
unredirect(m_MetaProcessor->m_backupFDStdout, STDOUT_FILENO, stdout);
}
if (m_isCurrentlyRedirecting & kSTDERR) {
unredirect(m_MetaProcessor->m_backupFDStderr, STDERR_FILENO, stderr);
}
}
MetaProcessor::MaybeRedirectOutputRAII::MaybeRedirectOutputRAII(
MetaProcessor* p)
:m_MetaProcessor(p), m_isCurrentlyRedirecting(0) {
StringRef redirectionFile;
if (!m_MetaProcessor->m_PrevStdoutFileName.empty()) {
redirectionFile = m_MetaProcessor->m_PrevStdoutFileName.back();
redirect(stdout, redirectionFile.str(), kSTDOUT);
}
if (!m_MetaProcessor->m_PrevStderrFileName.empty()) {
redirectionFile = m_MetaProcessor->m_PrevStderrFileName.back();
// Deal with the case 2>&1 and 2&>1
if (strcmp(redirectionFile.data(), "_IO_2_1_stdout_") == 0) {
// If out is redirected to a file.
if (!m_MetaProcessor->m_PrevStdoutFileName.empty()) {
redirectionFile = m_MetaProcessor->m_PrevStdoutFileName.back();
} else {
unredirect(m_MetaProcessor->m_backupFDStderr, STDERR_FILENO, stderr);
}
}
redirect(stderr, redirectionFile.str(), kSTDERR);
}
}