/*
* Windows cmd: a command line wrapper for GUI applications
*
* Copyright (C) 2012 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Usage:
* If your app is a GUI app compiled with -Wl,--subsystem,windows But
* you still want to run it from the command line to support console
* interaction (input, output), you can compile and install this small
* wrapper as a .com file next to your .exe. (.com takes precedence)
*
* This wrapper will call the .exe with the same arguments, and wait
* until it finished. The child process should attach to the same
* console and redirect standard input/output, this way:
*
* if (AttachConsole(ATTACH_PARENT_PROCESS) != 0) {
* freopen("CONIN$", "r", stdin);
* freopen("CONOUT$", "w", stdout);
* freopen("CONOUT$", "w", stderr);
* dup2(fileno(stdin), STDIN_FILENO);
* dup2(fileno(stdout), STDOUT_FILENO);
* dup2(fileno(stderr), STDERR_FILENO);
* }
* Note: if you have a better solution for hybrid console/windows app,
* I would be glad to learn how!
*
* Author: Marc-André Lureau <marcandre.lureau@redhat.com>
*/
#include <windows.h>
#include <psapi.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
int main(int argc, char *argv[])
{
STARTUPINFO si = { 0, };
PROCESS_INFORMATION pi = { 0, };
TCHAR name[MAX_PATH];
DWORD len = GetModuleFileName(NULL, name, MAX_PATH);
if (len < 5) {
printf("Invalid process name\n");
exit(1);
} else {
// We expect our helper to end with .com
assert(strncmp(name + len - 3, "com", 4) == 0);
// replace .com with .exe
strncpy(name + len - 3, "exe", 3);
}
si.cb = sizeof(si);
if (!CreateProcess(name,
GetCommandLine(),
NULL, // Process handle not inheritable
NULL, // Thread handle not inheritable
FALSE, // Set handle inheritance to FALSE
0, // No creation flags
NULL, // Use parent's environment block
NULL, // Use parent's starting directory
&si,
&pi)) {
printf("CreateProcess failed (%ld).\n", GetLastError());
exit(1);
}
// Wait until child process exits.
WaitForSingleObject(pi.hProcess, INFINITE);
// Close process and thread handles.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return 0;
}