parent
06b152504d
commit
6f34f5cdc2
@ -0,0 +1,122 @@
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Description: Enable bidirectional communication
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lxqt-sudo shows you what an executed process prints to stdout/stderr, but it
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doesn't send anything written to lxqt-sudo's stdin to the child process. This
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patch fixes that and adds some small miscellaneous improvements.
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Origin: https://github.com/ArrayBolt3/lxqt-sudo/compare/d69855c2900d10c2aae4d39678b71aadf37dc37c...4f430cb0fe240566e74ade15e1657b1f99177c12
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Forwarded: https://github.com/lxqt/lxqt-sudo/pull/210
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Last-Update: 2024-01-11
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---
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This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
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diff --git a/sudo.cpp b/sudo.cpp
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index d12f77c..eebcf5c 100644
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--- a/sudo.cpp
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+++ b/sudo.cpp
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@@ -68,6 +68,7 @@ namespace
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const QString doas_prog{QStringLiteral(LXQTSUDO_DOAS)};
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const QString pwd_prompt_end{QStringLiteral(": ")};
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const QChar nl{QLatin1Char('\n')};
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+ constexpr int term_eol_size = 2;
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void usage(QString const & err = QString())
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{
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@@ -374,12 +375,14 @@ int Sudo::parent()
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}
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QTextStream child_str{pwd_f};
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+ // pseudoterminal echoes everything written into it's input; we don't want duplicating input
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+ int inhibit_count = 0;
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QObject::connect(mDlg.data(), &QDialog::finished, [&] (int result)
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{
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if (QDialog::Accepted == result)
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{
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- child_str << mDlg->password().append(nl);
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+ child_str << mDlg->password() << nl;
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child_str.flush();
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} else
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{
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@@ -388,6 +391,8 @@ int Sudo::parent()
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});
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QString last_line;
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+ QString const & error_check = QStringLiteral("%1:").arg(backendName());
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+ QTextStream stderr_str{stderr, QIODevice::WriteOnly};
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QScopedPointer<QSocketNotifier> pwd_watcher{new QSocketNotifier{mPwdFd, QSocketNotifier::Read}};
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auto reader = [&]
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{
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@@ -396,11 +401,10 @@ int Sudo::parent()
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{
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pwd_watcher.reset(nullptr); //stop the notifications events
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- QString const & prog = backendName();
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- if (last_line.startsWith(QStringLiteral("%1:").arg(prog)))
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+ if (last_line.startsWith(error_check))
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{
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QMessageBox(QMessageBox::Critical, mDlg->windowTitle()
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- , tr("Child '%1' process failed!\n%2").arg(prog).arg(last_line), QMessageBox::Ok).exec();
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+ , tr("Child '%1' process failed!\n%2").arg(backendName()).arg(last_line), QMessageBox::Ok).exec();
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}
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} else
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{
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@@ -414,18 +418,56 @@ int Sudo::parent()
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if (!(ECHO & tios.c_lflag))
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{
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mDlg->show();
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- return;
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}
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}
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- QTextStream{stderr, QIODevice::WriteOnly} << line;
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- //assuming text oriented output
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- QStringList lines = line.split(nl, Qt::SkipEmptyParts);
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- last_line = lines.isEmpty() ? QString() : lines.back();
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+ if (inhibit_count > 0)
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+ {
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+ if (inhibit_count < line.count())
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+ {
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+ stderr_str << line.right(line.count() - inhibit_count);
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+ stderr_str.flush();
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+ inhibit_count = 0;
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+ } else
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+ {
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+ inhibit_count -= line.count();
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+ }
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+ } else
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+ {
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+ stderr_str << line;
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+ stderr_str.flush();
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+ }
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+
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+ //assuming text oriented output; find the last non-empty line
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+ auto i = line.crbegin(), i_end = line.crbegin(), i_crend = line.crend();
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+ do {
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+ i_end = i + 1;
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+ i = std::find(i_end, i_crend, nl);
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+ } while (i != i_crend && std::distance(i, i_end) == 0);
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+
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+ last_line.clear();
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+ last_line.reserve(std::distance(i, i_end));
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+ std::for_each(i.base(), i_end.base(), [&last_line](decltype (*i.base()) val) { last_line.append(val); });
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}
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};
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+ QTextStream stdin_str{stdin, QIODevice::ReadOnly};
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+ QScopedPointer<QSocketNotifier> stdin_watcher{new QSocketNotifier{STDIN_FILENO, QSocketNotifier::Read}};
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+ auto writer = [&]
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+ {
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+ QString line = stdin_str.readLine();
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+ if (line.isEmpty()) {
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+ stdin_watcher.reset(nullptr); //stop the notification events
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+ } else
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+ {
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+ inhibit_count += line.count() + term_eol_size;
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+ child_str << line << nl;
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+ child_str.flush();
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+ }
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+ };
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+
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QObject::connect(pwd_watcher.data(), &QSocketNotifier::activated, reader);
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+ QObject::connect(stdin_watcher.data(), &QSocketNotifier::activated, writer);
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std::unique_ptr<std::thread> child_waiter;
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QTimer::singleShot(0, [&child_waiter, this] {
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@ -1 +1,2 @@
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bypass-envvar-allowlist.patch
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enable-bidirectional-communication.patch
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