A smart memory pointer.

README.md

@@ -15,9 +15,9 @@ See [Intro Videos](https://kingtoolbox.github.io)
 
 # Download
 
-Windows Binary: https://github.com/kingToolbox/WindTerm/releases
+**Linux binary** and **Windows binary**: https://github.com/kingToolbox/WindTerm/releases
 
-(The binary of Macos and Linux will be committed later)
+(The binary of Macos will be committed later)
 
 # Source Code
 
@@ -27,7 +27,11 @@ Open source code includes, but is not limited to, the classes that can be used i
 
 # Issues and feature requests
 
-Any issues and feature requests are welcome. Please click [issues](https://github.com/kingToolbox/WindTerm/issues) to commit an issue.
+Any issues and feature requests are welcome.
+
+Please click [issues](https://github.com/kingToolbox/WindTerm/issues) to commit an issue or a feature request.
+
+Please click [Discussion](https://github.com/kingToolbox/WindTerm/discussions) to discuss anything about SSH, SFtp, Shell(Linux shell, Windows cmd and powershell), Telnet, Serial and WindTerm.
 
 # Screenshots
 
@@ -45,17 +49,21 @@ DigeWhite Theme:
 
 # Features
 
-### SSH, Telnet, Tcp, Serial
+### SSH, Telnet, Tcp, Shell, Serial
 - SSH v2, Telnet, Raw Tcp, Serial, Shell protocols implemented. [Intro Video](https://kingtoolbox.github.io/2020/01/22/new-session/)
 - Supports SSH auto execution when session authenticated.
+- Supports SSH ProxyCommand or ProxyJump. [Intro Video](https://kingtoolbox.github.io/2021/03/11/proxycommand/)
 - Supports SSH agent forwarding. [Intro Video](https://kingtoolbox.github.io/2020/08/22/ssh_agent_forwarding/)
 - Supports SSH auto login with password, public-key, keyboard-interactive, gssapi-with-mic. [Intro Video](https://kingtoolbox.github.io/2020/01/23/auto-login/)
 - Supports X11 forwarding. [Intro Video](https://kingtoolbox.github.io/2020/07/21/x11_forwarding/)
 - Supports direct/local port forwarding, reverse/remote port forwarding and dynamic port forwarding. [Intro Video](https://kingtoolbox.github.io/2020/07/21/port_forwarding/)
 - Integrated sftp, scp client, supports download, upload, remove, rename, make new file/directory and so on. [Intro Video](https://kingtoolbox.github.io/tags/transfer/)
 - Integrated local file manager, supports move to, copy to, copy from, remove, rename, make new file/directory and so on.
+- Supports Windows Cmd, PowerShell and Cmd, PowerShell as administrator.
+- Supports Linux bash, zsh, powershell core and so on.
 ### GUI
 - Session dialog and session tree.
+- **Enhanced protection of the session username and password.** [Intro Video](https://kingtoolbox.github.io/2021/03/11/protection-username-password/)
 - **Command palette.** [Intro Video](https://kingtoolbox.github.io/tags/command-palette/)
 - **Command sender.** [Intro Video](https://kingtoolbox.github.io/tags/sender/)
 - **Quick Bar.** [Intro Video](https://kingtoolbox.github.io/2020/08/22/quickbar/)
@@ -68,15 +76,21 @@ DigeWhite Theme:
 - Supports highlighting the opening and closing delimiter, such as (), [], {} and the customed delimiters. [Intro Video](https://kingtoolbox.github.io/2020/06/28/pair/)
 - Supports changing the UI theme. [Intro Video](https://kingtoolbox.github.io/2020/09/18/theme/)
 - Supports setting the tab color. [Intro Video](https://kingtoolbox.github.io/2020/09/18/tabbar-change-tabcolor/)
+- Supports searching over the opened tabs. [Intro Video](https://kingtoolbox.github.io/2021/03/11/tabbar-search-tab/)
 - Supports closing tabs to the right.
+- Supports setting the windows transparency. [Intro video](https://kingtoolbox.github.io/2020/11/13/windows-opacity/)
+- Supports select-to-copy and middle-click-to-paste.
+- Supports searching text online with Google, Bing, Github, Stackoverflow, Wikipedia and DuckDuckGo. [Intro video](https://kingtoolbox.github.io/2020/11/13/search-online/)
+- Supports hiding mouse cursor while typing.
 ### Term
 - Supports vt100, vt220, vt340, vt420, vt520, xterm, xterm-256-colors.
-- Supports unicode, true-color, mouse protocol, etc.
+- Supports unicode, emojis, true-color, mouse protocol, etc.
 - Supports auto wrap mode. [Intro Video](https://kingtoolbox.github.io/2020/01/22/auto-wrap/)
 - Protocols and terms can be customed.
 - All vttest tests have passed except Tektronix 4014.
 ### Session
-- **Supports HTTP and SOCKS5 proxy.** [Intro Video](https://kingtoolbox.github.io/2020/10/17/proxy/)
+- **Supports HTTP and SOCKS5 proxy.** [Intro Video](https://kingtoolbox.github.io/2021/03/11/proxy-http-socks5/)
+- **Supports Jump Server proxy.** [Intro Video](https://kingtoolbox.github.io/2021/03/11/proxy-jump-server/)
 - Supports manual and automated session logging. [Intro Video](https://kingtoolbox.github.io/tags/logging/)
 - Rename and duplicate session. [Intro Video](https://kingtoolbox.github.io/tags/tabbar/)
 - Restore last sessions and layouts when restart. [Intro Video](https://kingtoolbox.github.io/2020/01/22/restore-sessions/)
@@ -102,7 +116,7 @@ The version of clients:
 
 **All test data is for reference only.**
 
-- 5GB huge file (5,154,830 KB), generated by random data
+### 5GB huge file (5,154,830 KB), generated by random data
 
 | | Download Time | Download Rate | Upload Time | Upload Rate |
 | --- | --- | --- | --- | --- |
@@ -112,7 +126,7 @@ The version of clients:
 | FileZilla | 32s | 161.1 MB/s | 30s | 171.8 MB/s |
 | WinSCP | 81s | 63.7 MB/s | 91s | 56.7 MB/s |
 
-- 4400 files, 16 folders (107,042 KB), unzipped from [vim-7.4.1049.zip](https://github.com/vim/vim/archive/v7.4.1049.zip)
+### 4400 files, 16 folders (107,042 KB), unzipped from [vim-7.4.1049.zip](https://github.com/vim/vim/archive/v7.4.1049.zip)
 
 | | Download Time | Download Rate | Upload Time | Upload Rate |
 | --- | --- | --- | --- | --- |
@@ -153,7 +167,9 @@ The version of terminals:
 
 **All test data is for reference only.**
 
-- 97.6MB random text (102,401,504 bytes, 1,329,878 lines, generated and tested by [random_test.sh](https://github.com/kingToolbox/WindTerm/blob/master/benchmark/urandom_test.sh))
+## Test Command: "cat ./benchmark_randomdata"
+
+The benchmark_randomdata contains 97.6MB random text (102,401,504 bytes, 1,329,878 lines, generated and tested by [random_test.sh](https://github.com/kingToolbox/WindTerm/blob/master/benchmark/urandom_test.sh))
 
 In all cases, three runs were made to warm system caches. The reported numbers are the median of five runs. 
 
@@ -185,9 +201,9 @@ In all cases, three runs were made to warm system caches. The reported numbers a
 | kitty | unlimited | 17.2 | 2655 |
 | Alacritty | 100,000 | 41.3 | - |
 
-- time seq 1 n
+## Test command: "time seq 1 n" (n = [1000000, 2000000, 5000000, 10000000], scrollback lines: unlimited)
 
-1. n = 1,000,000, scrollback = 1,000,000 Lines
+### n = 1,000,000
 
 | | Time(sec) | Memory Usage(MB) |
 | --- | --- | --- |
@@ -200,7 +216,7 @@ In all cases, three runs were made to warm system caches. The reported numbers a
 | Alacritty | **1.162** | Not measured, use 100,000 scrollback lines setting |
 | Windows Terminal + ssh.exe | 23.246 | Not measured, use 65,535 scrollback lines setting |
 
-2. n = 2,000,000, scrollback = 2,000,000 Lines
+### n = 2,000,000
 
 | | Time(sec) | Memory Usage(MB) |
 | --- | --- | --- |
@@ -213,33 +229,33 @@ In all cases, three runs were made to warm system caches. The reported numbers a
 | Alacritty | 2.322 | Not measured, use 100,000 scrollback lines setting |
 | Windows Terminal + ssh.exe | 50.381 | Not measured, use 65,535 scrollback lines setting |
 
-3. n = 5,000,000 scrollback = 5,000,000 Lines
+### n = 5,000,000
 
 | | Time(sec) | Memory Usage(MB) |
 | --- | --- | --- |
 | WindTerm | **5.520** | **68.2** |
 | rxvt | 27.533 | 3166.2 |
 | putty | 45.911 | 2757.1 |
-| xterm | - | Out of memmory |
+| xterm | - | Out of memory |
 | iterm2 | 10.805 | 1048.3 |
 | Kitty | - | Out of memory |
 | Alacritty | 5.799 | Not measured, use 100,000 scrollback lines setting |
 | Windows Terminal + ssh.exe | 130.371 | Not measured, use 65,535 scrollback lines setting |
 
-4. n = 10,000,000 scrollback = 10,000,000 Lines
+### n = 10,000,000
 
 | | Time(sec) | Memory Usage(MB) |
 | --- | --- | --- |
 | WindTerm | **10.674** | **133.3** |
 | rxvt | - | Out of memory |
 | putty | - | Out of memory |
-| xterm | - | Out of memmory |
+| xterm | - | Out of memory |
 | iterm2 | 20.468 | 2231.3 |
 | Kitty | - | Out of memory |
 | Alacritty | 11.598 | Not measured, use 100,000 scrollback lines setting |
 | Windows Terminal + ssh.exe | 264.739 | Not measured, use 65,535 scrollback lines setting |
 
-5. n = 10,000,000 scrollback = 30 Lines
+### n = 10,000,000 scrollback = 30 Lines
 
 | | Time(sec) | Memory Usage(MB) |
 | --- | --- | --- |
@@ -252,6 +268,55 @@ In all cases, three runs were made to warm system caches. The reported numbers a
 | Alacritty | 11.798 | Not measured, use zero scrollback lines setting |
 | Windows Terminal + ssh.exe | 261.096 | Not measured, use zero scrollback lines setting |
 
+# Linux Terminal Performance
+
+The hardware used for generating the data in these benchmarks was
+
+    Debian 10 Vm - 4cpu and 4GB memory.
+
+    For WindTerm: No color scheme used in windterm. Color scheme will result in approximately 2% loss and more memory usage.
+
+    For other terminals: No memory usage measured because most of them write the history to disk or only support a limited number of lines in memory..
+
+The version of terminals:
+
+| Application | Version | Release Date |
+| --- | --- | --- |
+| Windterm | v1.9 | 2020-12-22 |
+| Gnome | v3.30.2 | 2018-10-22 |
+| Mate Terminal | v1.20.2 | 2019-02-11 |
+| Konsole | v18.04.0 | 2019-04-12 |
+| Xfce4 Terminal | v0.8.7.4 | 2018-5-15 |
+| QTerminal | v0.14.1 | 2019-01-26 |
+
+**All test data is for reference only.**
+
+## Test Command: "cat ./benchmark_randomdata"
+
+The benchmark_randomdata contains 97.6MB random text (102,401,504 bytes, 1,329,878 lines, generated and tested by [random_test.sh](https://github.com/kingToolbox/WindTerm/blob/master/benchmark/urandom_test.sh))
+
+In all cases, three runs were made to warm system caches. The reported numbers are the median of five runs. 
+
+| | Cost Time |
+| --- | --- |
+| WindTerm | **1.976s** |
+| Gnome Terminal  | 9.781s |
+| Mate Terminal  | 9.841s |
+| Konsole | 25.050s |
+| xfce4 Terminal | 10.520s |
+| QTerminal | 20.763s |
+
+## Test command: "time seq 1 n" (n = [1000000, 2000000, 5000000, 10000000], scrollback lines: unlimited)
+
+| n | 1,000,000 | 2,000,000 | 5,000,000 | 10,000,000 | 10,000,000<br>(scrollback lines: 100) |
+| --- | --- | --- | --- | --- | --- |
+| WindTerm | 0.846s (18.6MB) | **1.574s** (26.6MB) | **4.046s** (56.4MB) | **8.232s** (102.2MB) | **7.748s** (3.4MB) | 
+| Gnome Terminal  | 0.920s | 2.152s | 5.271s | 11.111s | 13.109s |
+| Mate Terminal  | **0.822s** | 1.698s | 5.943s | 10.920s | 12.290s |
+| Konsole | 1.612s | 3.199s | 8.157s | 16.029s | 15.650s |
+| xfce4 Terminal | 0.870s | 2.160s | 5.866s | 12.089s | 13.304s |
+| QTerminal | 9.272s | 18.391s | 45.999s | 104.277s | 17.208s |
+
 # Latency
 
 Considering the network influence on the latency, the following data is from [WindEdit](https://github.com/kingToolbox/digedit).
@@ -265,67 +330,27 @@ DIGEdit is the text component of WindTerm.
 
 # Shortcuts
 
-| Shortcut | Action |
+[Shortcut Keys List](https://kingtoolbox.github.io/tags/keyboard/)
-| --- | --- |
-| Alt+C | Copy |
-| Alt+D | Show command palette |
-| Alt+F | Find |
-| Alt+F3 | Find next |
-| Alt+Shift+F3 | Find previous |
-| Alt+F4 | Exit |
-| Alt+M, Alt+F | Toggle full screen |
-| Alt+M, Alt+H | Toggle hex view |
-| Alt+N | New session |
-| Alt+O | Open session |
-| Alt+S | Save text |
-| Alt+T, Alt+B | Toggle margin blank |
-| Alt+T, Alt+F | Toggle margin fold |
-| Alt+T, Alt+N | Toggle margin number |
-| Alt+T, Alt+S | Toggle margin symbol |
-| Alt+V | Paste |
-| Alt+W, Alt+D | Close active dock |
-| Alt+W, Alt+G | Close active group |
-| Alt+W, Alt+H | Split horizontally |
-| Alt+W, Alt+L | Show outline pane |
-| Alt+W, Alt+V | Split vertically |
-| Alt+X | Copy and paste |
-| Alt+- | Zoom in |
-| Alt++ | Zoom out |
-| Alt+\[ | Activate next view |
-| Alt+] | Activate previous view |
-| Ctrl+. | Jump to next fold |
-| Ctrl+, | Jump to previous fold |
-| Ctrl+Shift+A | Select all text |
-| Ctrl+Shift+T | Reopen closed session |
-| Ctrl+Shift+W | Close current session |
-| Ctrl+Shift+- | Select current fold text |
-| Shift+Del | Copy |
-| Shift+End | Jump to document end |
-| Shift+Home | Jump to document home |
-| Shift+Ins | Paste |
-| Shift+PgDown | Jump to next page |
-| Shift+PgUp | Jump to previous page |
 
 # Roadmap
 
 **Release cycle:**
 
-  2-4 weeks.
+  3-4 weeks.
   
-**Next release (Early November，for reference only):**
+**Features of version 2.1 (Early April，for reference only):**
-- **Linux Version**
+- New memory allocator and manager and garbage collector.
-- Linux bash
+- Search in sessions.
-- Windows Opacity
 - Xmodem, Ymodem, Zmodem(sz, rz)
-- External tools
 
-**Todo list:**
+**Featurs of version 2.x:**
-- Protocols:
+- Shell Pane
-  - Rlogin
+- External tools
-  - SSH
-    - ProxyCommand
 - UI:
   - Config dialog
+- Protocols:
+  - Mosh
+  - Rlogin
 - Terminal:
   - MacOs bash
 - Session:

src/Pty/UnixPty.cpp

@@ -0,0 +1,328 @@
+ /*
+ * Copyright 2020, WindTerm.
+ *
+ * Licensed 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 "UnixPty.h"
+#ifdef Q_OS_UNIX
+
+#include <QFileInfo>
+#include <QThread>
+
+#include <errno.h>
+#include <utmpx.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+constexpr int BUFFER_SIZE	= 0x800; // 2048 bytes
+
+ShellProcess::ShellProcess()
+	: QProcess()
+	, m_handleMaster(-1)
+	, m_handleSlave(-1)
+{
+	setProcessChannelMode(QProcess::MergedChannels);
+}
+
+void ShellProcess::setupChildProcess() {
+	dup2(m_handleSlave, STDIN_FILENO);
+	dup2(m_handleSlave, STDOUT_FILENO);
+	dup2(m_handleSlave, STDERR_FILENO);
+
+	pid_t sid = setsid();
+	ioctl(m_handleSlave, TIOCSCTTY, 0);
+	tcsetpgrp(m_handleSlave, sid);
+
+	struct utmpx utmpxInfo;
+	memset(&utmpxInfo, 0, sizeof(utmpxInfo));
+
+	strncpy(utmpxInfo.ut_user, qgetenv("USER"), sizeof(utmpxInfo.ut_user));
+
+	QString device(m_handleSlaveName);
+	if (device.startsWith("/dev/")) {
+		device = device.mid(5);
+	}
+	const char *d = device.toLatin1().constData();
+	strncpy(utmpxInfo.ut_line, d, sizeof(utmpxInfo.ut_line));
+	strncpy(utmpxInfo.ut_id, d + strlen(d) - sizeof(utmpxInfo.ut_id), sizeof(utmpxInfo.ut_id));
+
+	struct timeval tv;
+	gettimeofday(&tv, 0);
+	utmpxInfo.ut_tv.tv_sec = tv.tv_sec;
+	utmpxInfo.ut_tv.tv_usec = tv.tv_usec;
+
+	utmpxInfo.ut_type = USER_PROCESS;
+	utmpxInfo.ut_pid = getpid();
+
+	utmpxname(_PATH_UTMPX);
+	setutxent();
+	pututxline(&utmpxInfo);
+	endutxent();
+
+#if !defined(Q_OS_UNIX)
+	updwtmpx(_PATH_UTMPX, &loginInfo);
+#endif
+}
+
+UnixPty::UnixPty(QObject *parent /*= nullptr*/)
+	: Pty(parent)
+	, m_pid(0)
+	, m_readMasterNotify(nullptr)
+{
+	m_buffer = static_cast<char *>(malloc(BUFFER_SIZE));
+}
+
+UnixPty::~UnixPty() {
+	stop();
+
+	free(m_buffer);
+	m_buffer = nullptr;
+}
+
+bool UnixPty::createProcess(QString command, const QString &arguments,
+							const QString &workingDirectory, const QProcessEnvironment &environment,
+							int rows, int columns) {
+	if (m_shellProcess.state() == QProcess::Running) {
+		return false;
+	}
+
+	QFileInfo fileInfo(command);
+	if (fileInfo.isRelative() || fileInfo.exists() == false) {
+		setErrorString(tr("UnixPty: shell file path must be absolute"));
+		return false;
+	}
+
+	bool success = false;
+	do {
+		int result = 0;
+
+		m_shellProcess.m_handleMaster = ::posix_openpt(O_RDWR | O_NOCTTY);
+		if (m_shellProcess.m_handleMaster < 0) {
+			setError("Unable to open master");
+			break;
+		}
+
+		m_shellProcess.m_handleSlaveName = ptsname(m_shellProcess.m_handleMaster);
+		if (m_shellProcess.m_handleSlaveName.isEmpty()) {
+			setError("Unable to get slave name");
+			break;
+		}
+
+		result = grantpt(m_shellProcess.m_handleMaster);
+		if (result != 0) {
+			setError("Unable to change perms for slave");
+			break;
+		}
+
+		result = unlockpt(m_shellProcess.m_handleMaster);
+		if (result != 0) {
+			setError("Unable to unlock slave");
+			break;
+		}
+
+		m_shellProcess.m_handleSlave = ::open(m_shellProcess.m_handleSlaveName.toLatin1().data(), O_RDWR | O_NOCTTY);
+		if (m_shellProcess.m_handleSlave < 0) {
+			setError("Unable to open slave");
+			break;
+		}
+
+		int flags = fcntl(m_shellProcess.m_handleMaster, F_GETFL, 0);
+		result = fcntl(m_shellProcess.m_handleMaster, F_SETFL, flags | O_NONBLOCK);
+		if (result == -1) {
+			setError("Unable to set non-blocking mode for master");
+			break;
+		}
+
+		result = fcntl(m_shellProcess.m_handleMaster, F_SETFD, FD_CLOEXEC);
+		if (result == -1) {
+			setError("Unable to set flags for master");
+			break;
+		}
+
+		result = fcntl(m_shellProcess.m_handleSlave, F_SETFD, FD_CLOEXEC);
+		if (result == -1) {
+			setError("Unable to set flags for slave");
+			break;
+		}
+
+		struct ::termios ttmode;
+		if (terminalAttributes(&ttmode) == false) {
+			break;
+		}
+		ttmode.c_iflag |= IXON;
+		ttmode.c_iflag |= IUTF8;
+		ttmode.c_lflag |= ECHO;
+
+#ifdef Q_OS_MACOS
+		ttmode.c_cc[VDSUSP] = 25;
+		ttmode.c_cc[VSTATUS] = 20;
+#endif
+		if (setTerminalAttributes(&ttmode) == false) {
+			break;
+		}
+
+		m_readMasterNotify = new QSocketNotifier(m_shellProcess.m_handleMaster, QSocketNotifier::Read, &m_shellProcess);
+		m_readMasterNotify->setEnabled(true);
+		m_readMasterNotify->moveToThread(m_shellProcess.thread());
+
+		QObject::connect(m_readMasterNotify, &QSocketNotifier::activated, [this](int socket) {
+			Q_UNUSED(socket)
+			int readSize = 0;
+			QByteArray readData;
+
+			do {
+				readSize = ::read(m_shellProcess.m_handleMaster, m_buffer, BUFFER_SIZE);
+
+				if (readSize == -1) {
+					if (errno == EAGAIN) {
+						QThread::yieldCurrentThread();
+						continue;
+					} else {
+						break;
+					}
+				}
+				readData.append(QByteArray::fromRawData(m_buffer, readSize));
+			} while (readSize == BUFFER_SIZE || (readSize == -1 && errno == EAGAIN)); //last data block always < readSize
+
+			if (readData.isEmpty() == false) {
+				m_shellReadBuffer.append(readData);
+				emit readyRead();
+			}
+		});
+
+		m_shellProcess.setWorkingDirectory(workingDirectory);
+		m_shellProcess.setProcessEnvironment(environment);
+		m_shellProcess.setReadChannel(QProcess::StandardOutput);
+		m_shellProcess.start(command, arguments.isEmpty() ? QStringList() : QStringList(arguments));
+		m_shellProcess.waitForStarted();
+
+		m_pid = m_shellProcess.processId();
+		success = resizeWindow(rows, columns);
+	} while(0);
+
+	if (success == false) {
+		stop();
+	}
+	Q_ASSERT(success == true);
+	return success;
+}
+
+bool UnixPty::resizeWindow(int rows, int columns) {
+	if (rows != m_rows || columns != m_columns) {
+		bool success = false;
+		struct winsize winSize;
+
+		memset(&winSize, 0, sizeof(winSize));
+		winSize.ws_row = static_cast<quint16>(rows);
+		winSize.ws_col = static_cast<quint16>(columns);
+
+		if (ioctl(m_shellProcess.m_handleMaster, TIOCSWINSZ, &winSize) == 0
+			&& ioctl(m_shellProcess.m_handleSlave, TIOCSWINSZ, &winSize) == 0) {
+			m_rows = rows;
+			m_columns = columns;
+			success = true;
+		}
+		return success;
+	}
+	return true;
+}
+
+void UnixPty::setError(const char *error) {
+	Pty::setErrorString(QString("%1: %2 -> %3").arg(tr("UnixPty"), tr(error), strerror(errno)));
+}
+
+bool UnixPty::setTerminalAttributes(struct ::termios *ttmode) {
+	Q_ASSERT(m_shellProcess.m_handleMaster >= 0);
+	int result = -1;
+
+	if (m_shellProcess.m_handleMaster >=0) {
+		result = tcsetattr(m_shellProcess.m_handleMaster, TCSANOW, ttmode);
+
+		if (result != 0) {
+			setError("Unable to set terminal attributes");
+		}
+	}
+	return (result == 0);
+}
+
+void UnixPty::stop() {
+	m_shellProcess.m_handleSlaveName = QString();
+
+	if (m_shellProcess.m_handleSlave >= 0) {
+		::close(m_shellProcess.m_handleSlave);
+		m_shellProcess.m_handleSlave = -1;
+	}
+
+	if (m_shellProcess.m_handleMaster >= 0) {
+		::close(m_shellProcess.m_handleMaster);
+		m_shellProcess.m_handleMaster = -1;
+	}
+
+	if (m_shellProcess.state() == QProcess::Running) {
+		m_readMasterNotify->disconnect();
+		m_readMasterNotify->deleteLater();
+
+		m_shellProcess.terminate();
+		m_shellProcess.waitForFinished(1000);
+
+		if (m_shellProcess.state() == QProcess::Running) {
+			QProcess::startDetached(QString("kill -9 %1").arg(m_pid));
+			m_shellProcess.kill();
+			m_shellProcess.waitForFinished(1000);
+		}
+		Q_ASSERT(m_shellProcess.state() == QProcess::NotRunning);
+	}
+}
+
+bool UnixPty::terminalAttributes(struct ::termios *ttmode) {
+	Q_ASSERT(m_shellProcess.m_handleMaster >= 0);
+	int result = -1;
+
+	if (m_shellProcess.m_handleMaster >= 0) {
+		result = tcgetattr(m_shellProcess.m_handleMaster, ttmode);
+
+		if (result != 0) {
+			setError("Unable to get terminal attributes");
+		}
+	}
+	return (result == 0);
+}
+
+QByteArray UnixPty::readAll() {
+	QByteArray shellReadBuffer = m_shellReadBuffer;
+
+	m_shellReadBuffer.clear();
+	return shellReadBuffer;
+}
+
+qint64 UnixPty::write(const QByteArray &text) {
+	int writeSize = ::write(m_shellProcess.m_handleMaster, text.constData(), text.size());
+	Q_ASSERT(writeSize == text.size());
+
+	if (writeSize == -1) {
+		setError("Unable to write output");
+	}
+	return writeSize;
+}
+
+bool UnixPty::isAvailable() {
+	return true;
+}
+
+void UnixPty::moveToThread(QThread *targetThread) {
+	m_shellProcess.moveToThread(targetThread);
+}
+
+#endif // Q_OS_UNIX

src/Pty/UnixPty.h

@@ -0,0 +1,83 @@
+ /*
+ * Copyright 2020, WindTerm.
+ *
+ * Licensed 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.
+ */
+#ifndef UNIXPTY_H
+#define UNIXPTY_H
+
+#pragma once
+
+#include <QtGlobal>
+
+#ifdef Q_OS_UNIX
+
+#include "Pty.h"
+#include <QProcess>
+#include <QSocketNotifier>
+
+#include <termios.h>
+
+class ShellProcess
+	: public QProcess
+{
+    Q_OBJECT
+
+public:
+	ShellProcess();
+
+private:
+	void setupChildProcess() final;
+
+private:
+	int m_handleMaster;
+	int m_handleSlave;
+    QString m_handleSlaveName;
+
+private:
+	friend class UnixPty;
+};
+
+class UnixPty
+	: public Pty
+{
+public:
+	UnixPty(QObject *parent = nullptr);
+    virtual ~UnixPty();
+
+	bool createProcess(QString command, const QString &arguments,
+					   const QString &workingDirectory, const QProcessEnvironment &environment,
+					   int rows, int columns) final;
+	static bool isAvailable();
+	bool resizeWindow(int rows, int columns) final;
+    QByteArray readAll() final;
+	qint64 write(const QByteArray &text) final;
+
+private:
+	void moveToThread(QThread *targetThread);
+	void setError(const char *error);
+	bool setTerminalAttributes(struct ::termios *ttmode);
+	void stop();
+	bool terminalAttributes(struct ::termios *ttmode);
+
+private:
+	qint64 m_pid;
+	ShellProcess m_shellProcess;
+	QSocketNotifier *m_readMasterNotify;
+
+	char *m_buffer;
+	QByteArray m_shellReadBuffer;
+};
+
+#endif // Q_OS_UNIX
+#endif // UNIXPTY_H

src/README.md

@@ -30,6 +30,10 @@ A quick circular buffer template class.
 
 A very safe encryption class using the PBKDF2-algorithm as defined in RFC 8018. WindTerm uses this class together with the user's master password to protect user data, including passwords, private keys and so on.
 
+## Utility/MemoryPointer.h
+
+A smart memory pointer.
+
 ## Utility/ScopeGuard.h
 
 A class of which the sole purpose is to run the function f in its destructor. This is useful for guaranteeing your cleanup code is executed.

src/Utility/MemoryPointer.h

@@ -0,0 +1,140 @@
+#ifndef MEMORYPOINTER_H
+#define MEMORYPOINTER_H
+
+#pragma once
+
+#include <QtGlobal>
+
+template <typename T>
+struct MemoryPointer {
+	typedef decltype(nullptr) nullptr_t;
+
+public:
+	MemoryPointer()
+		: uMemory({ 0 })
+	{}
+
+	MemoryPointer(const MemoryPointer &other) = delete;
+	MemoryPointer &MemoryPointer::operator=(const MemoryPointer &other) = delete;
+
+	MemoryPointer &MemoryPointer::operator=(nullptr_t) noexcept {
+		free();
+
+		uMemory = { 0 };
+		return (*this);
+	}
+
+	MemoryPointer(MemoryPointer &&other) noexcept {
+		uMemory = other.uMemory;
+		other.uMemory = { 0 };
+	}
+
+	MemoryPointer& MemoryPointer::operator=(MemoryPointer &&other) noexcept	{
+		if (this != &other) {
+			free();
+			
+			uMemory = other.uMemory;
+			other.uMemory = { 0 };
+		}
+		return (*this);
+	}
+
+	~MemoryPointer() {
+		free();
+	}
+
+	inline T *data() const {
+		return static_cast<T *>(uMemory.pointer);
+	}
+
+	inline T *operator->() const {
+		return data();
+	}
+
+	inline T &operator*() const {
+		return *data();
+	}
+
+	inline operator T*() const {
+		return data();
+	}
+
+	inline operator bool() const noexcept {
+		return data() != nullptr;
+	}
+
+	inline bool isNull() const {
+		return uMemory.pointer == NULL;
+	}
+
+private:
+	void free() {
+		if (uMemory.alloced) {
+			::free(reinterpret_cast<void *>(uMemory.pointer));
+			uMemory = { 0 };
+		}
+	}
+
+private:
+	union MemoryUnion {
+		quint64 value;
+
+		struct {
+			quint64 alloced : 1;
+			quint64 pointer : 48;
+		};
+	};
+	MemoryUnion uMemory;
+};
+
+template <class T>
+inline bool operator==(const T *o, const MemoryPointer<T> &p) {
+	return o == p.operator->();
+}
+
+template<class T>
+inline bool operator==(const MemoryPointer<T> &p, const T *o) {
+	return p.operator->() == o;
+}
+
+template <class T>
+inline bool operator==(T *o, const MemoryPointer<T> &p) {
+	return o == p.operator->();
+}
+
+template<class T>
+inline bool operator==(const MemoryPointer<T> &p, T *o) {
+	return p.operator->() == o;
+}
+
+template<class T>
+inline bool operator==(const MemoryPointer<T> &lhs, const MemoryPointer<T> &rhs) {
+	return lhs.operator->() == rhs.operator->();
+}
+
+template <class T>
+inline bool operator!=(const T *o, const MemoryPointer<T> &p) {
+	return o != p.operator->();
+}
+
+template<class T>
+inline bool operator!= (const MemoryPointer<T> &p, const T *o) {
+	return p.operator->() != o;
+}
+
+template <class T>
+inline bool operator!=(T *o, const MemoryPointer<T> &p) {
+	return o != p.operator->();
+}
+
+template<class T>
+inline bool operator!= (const MemoryPointer<T> &p, T *o) {
+	return p.operator->() != o;
+}
+
+template<class T>
+inline bool operator!= (const MemoryPointer<T> &lhs, const MemoryPointer<T> &rhs) {
+	return lhs.operator->() != rhs.operator->();
+}
+
+#endif // MEMORYPOINTER_H

src/libssh/src/channels.c

@@ -2922,6 +2922,12 @@ int ssh_channel_read_timeout(ssh_channel channel,
                                       timeout_ms,
                                       ssh_channel_read_termination,
                                       &ctx);
+
+  if (rc == SSH_AGAIN && ssh_is_blocking(session)) {
+	  ssh_set_error(session, SSH_FATAL, "Handle packets timeout.");
+	  return rc;
+  }
+
   if (rc == SSH_ERROR){
     return rc;
   }