process_ctrlc_stub.cpp 5.16 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at info@qt.nokia.com.
**
**************************************************************************/

/* A stub for Windows console processes (like nmake) that is able to terminate
 * its child process via a generated Ctrl-C event.
 * The termination is triggered by sending a custom message to the HWND of
 * this process. */

#ifndef WINVER
#define WINVER 0x0501
#endif

#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <shellapi.h>
#include <wchar.h>
#include <cstdlib>
#include <cstdio>

53
54
const wchar_t szTitle[] = L"qtcctrlcstub";
const wchar_t szWindowClass[] = L"wcqtcctrlcstub";
55
56
57
58
59
UINT uiShutDownWindowMessage;
HWND hwndMain = 0;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
BOOL WINAPI ctrlHandler(DWORD dwCtrlType);
60
bool isSpaceOrTab(const wchar_t c);
61
62
63
64
65
66
67
68
69
70
bool startProcess(wchar_t pCommandLine[]);

int main(int argc, char **)
{
    if (argc < 2) {
        fprintf(stderr, "This is an internal helper of Qt Creator. Do not run it manually.\n");
        return 1;
    }

    SetConsoleCtrlHandler(ctrlHandler, TRUE);
71
    uiShutDownWindowMessage = RegisterWindowMessage(L"qtcctrlcstub_shutdown");
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90

    WNDCLASSEX wcex;
    ZeroMemory(&wcex, sizeof(wcex));
    wcex.cbSize = sizeof(wcex);
    wcex.lpfnWndProc = WndProc;
    wcex.hInstance = GetModuleHandle(0);
    wcex.lpszClassName = szWindowClass;
    if (!RegisterClassEx(&wcex))
        return 1;

    hwndMain = CreateWindow(szWindowClass, szTitle, WS_DISABLED,
                            0, 0, 0, 0, NULL, NULL, wcex.hInstance, NULL);
    if (!hwndMain)
        return FALSE;

    // Get the command line and remove the call to this executable.
    wchar_t *strCommandLine = _wcsdup(GetCommandLine());
    const size_t strCommandLineLength = wcslen(strCommandLine);
    size_t pos = 1;
91
92
93
94
95
96
97
98
99
100
101
102
    bool quoted = false;
    while (pos < strCommandLineLength) {
        if (strCommandLine[pos] == L'"') {
            quoted = !quoted;
        } else if (!quoted && isSpaceOrTab(strCommandLine[pos])) {
            while (isSpaceOrTab(strCommandLine[++pos]));
            break;
        }
        ++pos;
    }

    bool bSuccess = startProcess(strCommandLine + pos);
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
    free(strCommandLine);

    if (!bSuccess)
        return 1;

    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int) msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    if (message == uiShutDownWindowMessage) {
        GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0);
        PostQuitMessage(0);
        return 0;
    }

    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

137
bool isSpaceOrTab(const wchar_t c)
138
{
139
    return c == L' ' || c == L'\t';
140
141
142
143
144
145
146
147
}

BOOL WINAPI ctrlHandler(DWORD /*dwCtrlType*/)
{
    PostMessage(hwndMain, WM_DESTROY, 0, 0);
    return TRUE;
}

148
DWORD WINAPI processWatcherThread(LPVOID lpParameter)
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
{
    HANDLE hProcess = reinterpret_cast<HANDLE>(lpParameter);
    WaitForSingleObject(hProcess, INFINITE);
    PostMessage(hwndMain, WM_DESTROY, 0, 0);
    return 0;
}

bool startProcess(wchar_t *pCommandLine)
{
    SECURITY_ATTRIBUTES sa;
    ZeroMemory(&sa, sizeof(sa));
    sa.nLength = sizeof(sa);
    sa.bInheritHandle = TRUE;

    STARTUPINFO si;
    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);

    PROCESS_INFORMATION pi;
    DWORD dwCreationFlags = 0;
    BOOL bSuccess = CreateProcess(NULL, pCommandLine, &sa, &sa, TRUE, dwCreationFlags, NULL, NULL, &si, &pi);
    if (!bSuccess) {
171
        fwprintf(stderr, L"qtcreator_ctrlc_stub: Command line failed: %s\n", pCommandLine);
172
173
174
175
176
        return false;
    }

    HANDLE hThread = CreateThread(NULL, 0, processWatcherThread, reinterpret_cast<void*>(pi.hProcess), 0, NULL);
    if (!hThread) {
177
        fwprintf(stderr, L"qtcreator_ctrlc_stub: The watch dog thread cannot be started.\n");
178
179
180
181
182
        return false;
    }
    CloseHandle(hThread);
    return true;
}