updater: move the windows process starting code to comphelper

Change-Id: I1a499f57d01ee28afdb2c4f85dc976f2e6837dfd
Reviewed-on: https://gerrit.libreoffice.org/40837
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

2 files changed, 1 insertions, 271 deletions

diff --git a/onlineupdate/source/update/updater/updater.cxx b/onlineupdate/source/update/updater/updater.cxx
index 8a1ef8bf5b24..1509d570ba23 100644
--- a/onlineupdate/source/update/updater/updater.cxx
+++ b/onlineupdate/source/update/updater/updater.cxx
@@ -63,7 +63,7 @@
 #include <onlineupdate/mozilla/Types.h>
 
 #ifdef _WIN32
-#include <winhelper/windowsStart.hxx>
+#include <comphelper/windowsStart.hxx>
 #include "uachelper.h"
 #include "pathhash.h"
 
diff --git a/onlineupdate/source/winhelper/windowsStart.cxx b/onlineupdate/source/winhelper/windowsStart.cxx
deleted file mode 100644
index 1c782d7a289f..000000000000
--- a/onlineupdate/source/winhelper/windowsStart.cxx
+++ /dev/null
@@ -1,270 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include <windows.h>
-#include <shellapi.h>
-
-#include <cstddef>
-#include <cwchar>
-
-// Needed for CreateEnvironmentBlock
-#include <userenv.h>
-#pragma comment(lib, "userenv.lib")
-
-/**
- * Get the length that the string will take and takes into account the
- * additional length if the string needs to be quoted and if characters need to
- * be escaped.
- */
-static int ArgStrLen(const wchar_t *s)
-{
-    int backslashes = 0;
-    int i = wcslen(s);
-    BOOL hasDoubleQuote = wcschr(s, L'"') != nullptr;
-    // Only add doublequotes if the string contains a space or a tab
-    BOOL addDoubleQuotes = wcspbrk(s, L" \t") != nullptr;
-
-    if (addDoubleQuotes)
-    {
-        i += 2; // initial and final duoblequote
-    }
-
-    if (hasDoubleQuote)
-    {
-        while (*s)
-        {
-            if (*s == '\\')
-            {
-                ++backslashes;
-            }
-            else
-            {
-                if (*s == '"')
-                {
-                    // Escape the doublequote and all backslashes preceding the doublequote
-                    i += backslashes + 1;
-                }
-
-                backslashes = 0;
-            }
-
-            ++s;
-        }
-    }
-
-    return i;
-}
-
-/**
- * Copy string "s" to string "d", quoting the argument as appropriate and
- * escaping doublequotes along with any backslashes that immediately precede
- * doublequotes.
- * The CRT parses this to retrieve the original argc/argv that we meant,
- * see STDARGV.C in the MSVC CRT sources.
- *
- * @return the end of the string
- */
-static wchar_t* ArgToString(wchar_t *d, const wchar_t *s)
-{
-    int backslashes = 0;
-    BOOL hasDoubleQuote = wcschr(s, L'"') != nullptr;
-    // Only add doublequotes if the string contains a space or a tab
-    BOOL addDoubleQuotes = wcspbrk(s, L" \t") != nullptr;
-
-    if (addDoubleQuotes)
-    {
-        *d = '"'; // initial doublequote
-        ++d;
-    }
-
-    if (hasDoubleQuote)
-    {
-        int i;
-        while (*s)
-        {
-            if (*s == '\\')
-            {
-                ++backslashes;
-            }
-            else
-            {
-                if (*s == '"')
-                {
-                    // Escape the doublequote and all backslashes preceding the doublequote
-                    for (i = 0; i <= backslashes; ++i)
-                    {
-                        *d = '\\';
-                        ++d;
-                    }
-                }
-
-                backslashes = 0;
-            }
-
-            *d = *s;
-            ++d;
-            ++s;
-        }
-    }
-    else
-    {
-        wcscpy(d, s);
-        d += wcslen(s);
-    }
-
-    if (addDoubleQuotes)
-    {
-        *d = '"'; // final doublequote
-        ++d;
-    }
-
-    return d;
-}
-
-/**
- * Creates a command line from a list of arguments. The returned
- * string is allocated with "malloc" and should be "free"d.
- *
- * argv is UTF8
- */
-wchar_t*
-MakeCommandLine(int argc, wchar_t **argv)
-{
-    int i;
-    int len = 0;
-
-    // The + 1 of the last argument handles the allocation for null termination
-    for (i = 0; i < argc; ++i)
-        len += ArgStrLen(argv[i]) + 1;
-
-    // Protect against callers that pass 0 arguments
-    if (len == 0)
-        len = 1;
-
-    wchar_t *s = (wchar_t*) malloc(len * sizeof(wchar_t));
-    if (!s)
-        return nullptr;
-
-    wchar_t *c = s;
-    for (i = 0; i < argc; ++i)
-    {
-        c = ArgToString(c, argv[i]);
-        if (i + 1 != argc)
-        {
-            *c = ' ';
-            ++c;
-        }
-    }
-
-    *c = '\0';
-
-    return s;
-}
-
-/**
- * Launch a child process with the specified arguments.
- * @note argv[0] is ignored
- * @note The form of this function that takes char **argv expects UTF-8
- */
-BOOL
-WinLaunchChild(const wchar_t *exePath,
-               int argc, wchar_t **argv,
-               HANDLE userToken = nullptr,
-               HANDLE *hProcess = nullptr);
-
-BOOL
-WinLaunchChild(const wchar_t *exePath,
-               int argc,
-               wchar_t **argv,
-               HANDLE userToken,
-               HANDLE *hProcess)
-{
-    wchar_t *cl;
-    BOOL ok;
-
-    cl = MakeCommandLine(argc, argv);
-    if (!cl)
-    {
-        return FALSE;
-    }
-
-    STARTUPINFOW si = {0};
-    si.cb = sizeof(STARTUPINFOW);
-    si.lpDesktop = L"winsta0\\Default";
-    PROCESS_INFORMATION pi = {0};
-
-    if (userToken == nullptr)
-    {
-        ok = CreateProcessW(exePath,
-                            cl,
-                            nullptr,  // no special security attributes
-                            nullptr,  // no special thread attributes
-                            FALSE, // don't inherit filehandles
-                            0,     // creation flags
-                            nullptr,  // inherit my environment
-                            nullptr,  // use my current directory
-                            &si,
-                            &pi);
-    }
-    else
-    {
-        // Create an environment block for the process we're about to start using
-        // the user's token.
-        LPVOID environmentBlock = nullptr;
-        if (!CreateEnvironmentBlock(&environmentBlock, userToken, TRUE))
-        {
-            environmentBlock = nullptr;
-        }
-
-        ok = CreateProcessAsUserW(userToken,
-                                  exePath,
-                                  cl,
-                                  nullptr,  // no special security attributes
-                                  nullptr,  // no special thread attributes
-                                  FALSE,    // don't inherit filehandles
-                                  0,        // creation flags
-                                  environmentBlock,
-                                  nullptr,  // use my current directory
-                                  &si,
-                                  &pi);
-
-        if (environmentBlock)
-        {
-            DestroyEnvironmentBlock(environmentBlock);
-        }
-    }
-
-    if (ok)
-    {
-        if (hProcess)
-        {
-            *hProcess = pi.hProcess; // the caller now owns the HANDLE
-        }
-        else
-        {
-            CloseHandle(pi.hProcess);
-        }
-        CloseHandle(pi.hThread);
-    }
-    else
-    {
-        LPVOID lpMsgBuf = nullptr;
-        FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
-                      FORMAT_MESSAGE_FROM_SYSTEM |
-                      FORMAT_MESSAGE_IGNORE_INSERTS,
-                      nullptr,
-                      GetLastError(),
-                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                      (LPTSTR) &lpMsgBuf,
-                      0,
-                      nullptr);
-        wprintf(L"Error restarting: %s\n", lpMsgBuf ? lpMsgBuf : L"(null)");
-        if (lpMsgBuf)
-            LocalFree(lpMsgBuf);
-    }
-
-    free(cl);
-
-    return ok;
-}