1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-launch-win.c  dbus-launch utility
3 *
4 * Copyright (C) 2007 Ralf Habacker <ralf.habacker@freenet.de>
5 *
6 * Licensed under the Academic Free License version 2.1
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
21 *
22 */
23
24#include <config.h>
25#ifndef UNICODE
26#define UNICODE 1
27#endif
28#include <windows.h>
29#include <stdio.h>
30#include <string.h>
31#include <assert.h>
32
33/* Save string functions.  Instead of figuring out the exact _MSC_VER
34   that work, override for everybody.  */
35
36#define errno_t int
37#define wcscat_s my_wcscat_s
38#define wcscpy_s my_wcscpy_s
39
40static errno_t
41wcscat_s (wchar_t *dest, size_t size, wchar_t *src)
42{
43  assert (sizeof (wchar_t) * (wcslen (dest) + wcslen (src) + 1) <= size);
44  wcscat (dest, src);
45  return 0;
46}
47
48
49static errno_t
50wcscpy_s (wchar_t *dest, size_t size, wchar_t *src)
51{
52  assert (sizeof (wchar_t) * (wcslen (src) + 1) <= size);
53  wcscpy (dest, src);
54  return 0;
55}
56
57/* TODO (tl): This Windows version of dbus-launch is curretly rather
58 * pointless as it doesn't take the same command-line options as the
59 * UNIX dbus-launch does. A main point of the dbus-launch command is
60 * to pass it for instance a --config-file option to make the started
61 * dbus-daemon use that config file.
62 *
63 * This version also doesn't print out any information, which is a
64 * main point of the UNIX one. It should at least support the
65 * --sh-syntax option, and maybe also a --cmd-syntax to print out the
66 * variable settings in cmd.exe syntax?
67 *
68 * NOTE (rh): The main task of dbus-launch is (from the man page) to start
69 * a session bus and this is archieved by the current implemention.
70 *
71 * Additional on windows the session bus starting in not integrated
72 * into the logon process, so there is no need for any --syntax option.
73 * In fact (at least for kde on windows) the session bus is autostarted
74 * with the first application requesting a session bus.
75 *
76 */
77
78#define AUTO_ACTIVATE_CONSOLE_WHEN_VERBOSE_MODE 1
79
80#define DIM(x) (sizeof(x) / sizeof(x[0]))
81#define WCSTRINGIFY_(x) L ## x
82#define WCSTRINGIFY(x) WCSTRINGIFY_(x)
83
84int
85main (int argc, char **argv)
86{
87  wchar_t dbusDaemonPath[MAX_PATH * 2 + 1];
88  wchar_t command[MAX_PATH * 2 + 1];
89  wchar_t *p;
90  wchar_t *daemon_name;
91  int result;
92  int showConsole = 0;
93#ifdef DBUS_WINCE
94  char *s = NULL;
95#else
96  char *s = getenv("DBUS_VERBOSE");
97#endif
98  int verbose = s && *s != '\0' ? 1 : 0;
99
100  PROCESS_INFORMATION pi;
101  STARTUPINFOW si;
102  BOOL inherit = TRUE;
103  DWORD flags = 0;
104
105#ifdef AUTO_ACTIVATE_CONSOLE_WHEN_VERBOSE_MODE
106  if (verbose)
107      showConsole = 1;
108#endif
109  GetModuleFileNameW (NULL, dbusDaemonPath, DIM (dbusDaemonPath));
110
111  daemon_name = WCSTRINGIFY(DBUS_DAEMON_NAME) L".exe";
112
113  if ((p = wcsrchr (dbusDaemonPath, L'\\')))
114    {
115      p[1] = L'\0';
116      wcscat_s (dbusDaemonPath, sizeof (dbusDaemonPath), daemon_name);
117    }
118  else
119    {
120      if (verbose)
121          fprintf (stderr, "error: could not extract path from current "
122                   "applications module filename\n");
123      return 1;
124    }
125
126#ifdef DBUS_WINCE
127   /* Windows CE has a different interpretation of cmdline: Start with argv[1].  */
128   wcscpy_s (command, sizeof (command), L"--session");
129   if (verbose)
130     fprintf (stderr, "%ls %ls\n", dbusDaemonPath, command);
131#else
132   command[0] = L'\0';
133   /* Windows CE has a different interpretation of cmdline: Start with argv[1].  */
134   wcscpy_s (command, sizeof (command), dbusDaemonPath);
135   wcscat_s (command, sizeof (command), L" --session");
136   if (verbose)
137     fprintf (stderr, "%ls\n", command);
138#endif
139
140  memset (&si, 0, sizeof (si));
141  memset (&pi, 0, sizeof (pi));
142  si.cb = sizeof (si);
143
144  if (verbose)
145    flags |= CREATE_NEW_CONSOLE;
146
147#ifdef DBUS_WINCE
148  inherit = FALSE;
149#else
150  flags |= NORMAL_PRIORITY_CLASS;
151  if (!verbose)
152    flags |= DETACHED_PROCESS;
153#endif
154
155  result = CreateProcessW (dbusDaemonPath, command, 0, 0,
156                           inherit, flags, 0, 0, &si, &pi);
157
158  if (result == 0)
159    {
160      if (verbose)
161        fprintf (stderr, "Could not start " DBUS_DAEMON_NAME ". error=%d\n",
162                 GetLastError ());
163      return 4;
164    }
165
166  CloseHandle (pi.hProcess);
167  CloseHandle (pi.hThread);
168
169  return 0;
170}
171