From b109b3aa802ba463200eeced0f654f5316549deb Mon Sep 17 00:00:00 2001
From: RadAd <adamgates84+github@gmail.com>
Date: Fri, 24 May 2019 11:43:35 +1000
Subject: Initial version

---
 ProcessUtils.cpp | 155 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 ProcessUtils.cpp

(limited to 'ProcessUtils.cpp')

diff --git a/ProcessUtils.cpp b/ProcessUtils.cpp
new file mode 100644
index 0000000..8b8aa45
--- /dev/null
+++ b/ProcessUtils.cpp
@@ -0,0 +1,155 @@
+#include "ProcessUtils.h"
+#include <Windows.h>
+#include <tchar.h>
+#include <vector>
+
+// TODO
+// Support .lnk files
+
+namespace {
+    void Clear(SubProcessData* spd)
+    {
+        spd->hOutput = NULL;
+        spd->hInput = NULL;
+        spd->pi.hThread = NULL;
+        spd->pi.hProcess = NULL;
+        spd->hPC = NULL;
+    }
+
+    SubProcessData CreateSubProcess(LPCTSTR cmd, COORD size, HANDLE hInput, HANDLE hOutput, bool bUseConPty)
+    {
+        SubProcessData spd = {};
+
+        DWORD dwCreationFlags = EXTENDED_STARTUPINFO_PRESENT;
+        STARTUPINFOEX si = {};
+        std::vector<BYTE> attrList;
+        si.StartupInfo.cb = sizeof(si);
+
+        if (bUseConPty)
+        {
+            spd.hr = CreatePseudoConsole(
+                size,
+                hInput,
+                hOutput,
+                0,
+                &spd.hPC);
+            if (spd.hr != S_OK)
+            {
+                CleanupSubProcess(&spd);
+                Clear(&spd);
+                return spd;
+            }
+
+            SIZE_T size = 0;
+            if (InitializeProcThreadAttributeList(NULL, 1, 0, &size))
+            {
+                spd.hr = HRESULT_FROM_WIN32(GetLastError());
+                CleanupSubProcess(&spd);
+                Clear(&spd);
+                return spd;
+            }
+
+            attrList.resize(size);
+            si.lpAttributeList = reinterpret_cast<PPROC_THREAD_ATTRIBUTE_LIST>(attrList.data());
+            if (!InitializeProcThreadAttributeList(si.lpAttributeList, 1, 0, &size))
+            {
+                spd.hr = HRESULT_FROM_WIN32(GetLastError());
+                CleanupSubProcess(&spd);
+                Clear(&spd);
+                return spd;
+            }
+            if (!UpdateProcThreadAttribute(
+                si.lpAttributeList,
+                0,
+                PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE,
+                spd.hPC, sizeof(HPCON),
+                NULL,
+                NULL))
+            {
+                spd.hr = HRESULT_FROM_WIN32(GetLastError());
+                CleanupSubProcess(&spd);
+                Clear(&spd);
+                return spd;
+            }
+        }
+        else
+        {
+            si.StartupInfo.dwXSize = size.X;
+            si.StartupInfo.dwYSize = size.Y;
+            si.StartupInfo.dwFlags = STARTF_USESIZE | STARTF_USESTDHANDLES;
+            si.StartupInfo.hStdInput = hInput;
+            si.StartupInfo.hStdOutput = hOutput;
+            si.StartupInfo.hStdError = si.StartupInfo.hStdOutput;
+            dwCreationFlags |= CREATE_NO_WINDOW;
+        }
+
+        TCHAR localcmd[MAX_PATH];
+        wcscpy_s(localcmd, cmd);
+        if (!CreateProcess(nullptr, localcmd, nullptr, nullptr, FALSE, dwCreationFlags, nullptr, nullptr, &si.StartupInfo, &spd.pi))
+        {
+            spd.hr = HRESULT_FROM_WIN32(GetLastError());
+            CleanupSubProcess(&spd);
+            Clear(&spd);
+            return spd;
+        }
+
+        spd.hr = S_OK;
+        return spd;
+    }
+}
+
+SubProcessData CreateSubProcess(LPCTSTR cmd, COORD size, bool bUseConPty)
+{
+    SubProcessData spd = {};
+
+    HANDLE hReadPipeInput = NULL;
+    HANDLE hWritePipeInput = NULL;
+    if (spd.hr == S_OK && !CreatePipe(&hReadPipeInput, &hWritePipeInput, nullptr, 0))
+        spd.hr = HRESULT_FROM_WIN32(GetLastError());
+
+    HANDLE hWritePipeOutput = NULL;
+    HANDLE hReadPipeOutput = NULL;
+    if (spd.hr == S_OK && !CreatePipe(&hReadPipeOutput, &hWritePipeOutput, nullptr, 0))
+        spd.hr = HRESULT_FROM_WIN32(GetLastError());
+
+    if (spd.hr == S_OK)
+        spd = CreateSubProcess(cmd, size, hReadPipeInput, hWritePipeOutput, true);
+
+    if (spd.hr == S_OK)
+    {
+        spd.hInput = hWritePipeInput;
+        spd.hOutput = hReadPipeOutput;
+    }
+    else
+    {
+        CloseHandle(hWritePipeInput);
+        CloseHandle(hReadPipeOutput);
+    }
+
+    CloseHandle(hReadPipeInput);
+    CloseHandle(hWritePipeOutput);
+
+    return spd;
+}
+
+void CleanupSubProcess(const SubProcessData* spd)
+{
+    CloseHandle(spd->hOutput);
+    CloseHandle(spd->hInput);
+
+    TerminateProcess(spd->pi.hProcess, 0xFF);
+
+    CloseHandle(spd->pi.hThread);
+    CloseHandle(spd->pi.hProcess);
+    ClosePseudoConsole(spd->hPC);
+}
+
+UINT GetIcon(const SubProcessData* spd, HICON *phIconLarge, HICON *phIconSmall)
+{
+    TCHAR exe[MAX_PATH];
+    DWORD exelen = ARRAYSIZE(exe);
+    QueryFullProcessImageName(spd->pi.hProcess, 0, exe, &exelen);
+
+    WORD iIcon = 0;
+    return ExtractIconEx(exe, 0, phIconLarge, phIconSmall, 1);
+}
-- 
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