dbus/dbus-file-win.c - manifest_repos/dbus - Git at Google

 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 /* dbus-file-win.c windows related file implementation (internal to D-Bus implementation)
  *
  * Copyright (C) 2002, 2003, 2006  Red Hat, Inc.
  * Copyright (C) 2003 CodeFactory AB
  *
  * Licensed under the Academic Free License version 2.1
  *
  * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */

 #include <config.h>
 #include "dbus-protocol.h"
 #include "dbus-string.h"
 #include "dbus-internals.h"
 #include "dbus-sysdeps-win.h"
 #include "dbus-pipe.h"

 #include <windows.h>


 /**
  * Thin wrapper around the read() system call that appends
  * the data it reads to the DBusString buffer. It appends
  * up to the given count.
  *
  * @param hnd the HANDLE to read from
  * @param buffer the buffer to append data to
  * @param count the amount of data to read
  * @param error place to set an error
  * @returns the number of bytes read or -1
  */
 static int
 _dbus_file_read (HANDLE            hnd,
                  DBusString       *buffer,
                  int               count,
                  DBusError        *error)
 {
   BOOL result;
   DWORD bytes_read;
   int start;
   char *data;

   _DBUS_ASSERT_ERROR_IS_CLEAR (error);

   _dbus_assert (count >= 0);

   start = _dbus_string_get_length (buffer);

   if (!_dbus_string_lengthen (buffer, count))
     {
       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
       return -1;
     }

   data = _dbus_string_get_data_len (buffer, start, count);

   result = ReadFile (hnd, data, count, &bytes_read, NULL);
   if (result == 0)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                       "Failed to read from 0x%x: %s", hnd, emsg);
       _dbus_win_free_error_string (emsg);
       return -1;
     }

   if (bytes_read)
     {
       /* put length back (doesn't actually realloc) */
       _dbus_string_set_length (buffer, start + bytes_read);

 #if 0
       if (bytes_read > 0)
         _dbus_verbose_bytes_of_string (buffer, start, bytes_read);
 #endif
     }

   return bytes_read;
 }


 /**
  * Appends the contents of the given file to the string,
  * returning error code. At the moment, won't open a file
  * more than a megabyte in size.
  *
  * @param str the string to append to
  * @param filename filename to load
  * @param error place to set an error
  * @returns #FALSE if error was set
  */
 dbus_bool_t
 _dbus_file_get_contents (DBusString       *str,
                          const DBusString *filename,
                          DBusError        *error)
 {
   HANDLE hnd;
   DWORD fsize;
   DWORD fsize_hi;
   int orig_len;
   unsigned int total;
   const char *filename_c;

   _DBUS_ASSERT_ERROR_IS_CLEAR (error);

   filename_c = _dbus_string_get_const_data (filename);

   hnd = CreateFileA (filename_c, GENERIC_READ,
                     FILE_SHARE_READ | FILE_SHARE_WRITE,
                     NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   if (hnd == INVALID_HANDLE_VALUE)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Failed to open \"%s\": %s", filename_c, emsg);
       _dbus_win_free_error_string (emsg);
       return FALSE;
     }

   _dbus_verbose ("file %s hnd %p opened\n", filename_c, hnd);

   fsize = GetFileSize (hnd, &fsize_hi);
   if (fsize == 0xFFFFFFFF && GetLastError() != NO_ERROR)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                       "Failed to get file size for \"%s\": %s",
                       filename_c, emsg);
       _dbus_win_free_error_string (emsg);

       _dbus_verbose ("GetFileSize() failed: %s", emsg);

       CloseHandle (hnd);

       return FALSE;
     }

   if (fsize_hi != 0 || fsize > _DBUS_ONE_MEGABYTE)
     {
       dbus_set_error (error, DBUS_ERROR_FAILED,
                       "File size %lu/%lu of \"%s\" is too large.",
                       (unsigned long) fsize_hi,
                       (unsigned long) fsize, filename_c);
       CloseHandle (hnd);
       return FALSE;
     }

   total = 0;
   orig_len = _dbus_string_get_length (str);
   if (fsize > 0)
     {
       int bytes_read;

       while (total < fsize)
         {
           bytes_read = _dbus_file_read (hnd, str, fsize - total, error);
           if (bytes_read <= 0)
             {
               if (bytes_read == 0)
                 {
                   dbus_set_error (error, DBUS_ERROR_FAILED,
                                   "Premature EOF reading \"%s\"",
                                   filename_c);
                 }
               else
                 _DBUS_ASSERT_ERROR_IS_SET (error);

               CloseHandle (hnd);
               _dbus_string_set_length (str, orig_len);
               return FALSE;
             }
           else
             total += bytes_read;
         }

       CloseHandle (hnd);
       return TRUE;
     }
   else
     {
       CloseHandle (hnd);
       return TRUE;
     }
 }


 /**
  * Writes a string out to a file. If the file exists,
  * it will be atomically overwritten by the new data.
  *
  * @param str the string to write out
  * @param filename the file to save string to
  * @param world_readable if true, ensure file is world readable
  * @param error error to be filled in on failure
  * @returns #FALSE on failure
  */
 dbus_bool_t
 _dbus_string_save_to_file (const DBusString *str,
                            const DBusString *filename,
                            dbus_bool_t       world_readable,
                            DBusError        *error)
 {
   HANDLE hnd;
   int bytes_to_write;
   const char *filename_c;
   DBusString tmp_filename;
   const char *tmp_filename_c;
   int total;
   const char *str_c;
   dbus_bool_t need_unlink;
   dbus_bool_t retval;

   _DBUS_ASSERT_ERROR_IS_CLEAR (error);

   hnd = INVALID_HANDLE_VALUE;
   retval = FALSE;
   need_unlink = FALSE;

   if (!_dbus_string_init (&tmp_filename))
     {
       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
       return FALSE;
     }

   if (!_dbus_string_copy (filename, 0, &tmp_filename, 0))
     {
       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
       _dbus_string_free (&tmp_filename);
       return FALSE;
     }

   if (!_dbus_string_append (&tmp_filename, "."))
     {
       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
       _dbus_string_free (&tmp_filename);
       return FALSE;
     }

 #define N_TMP_FILENAME_RANDOM_BYTES 8
   if (!_dbus_generate_random_ascii (&tmp_filename, N_TMP_FILENAME_RANDOM_BYTES,
                                     error))
     {
       _dbus_string_free (&tmp_filename);
       return FALSE;
     }

   filename_c = _dbus_string_get_const_data (filename);
   tmp_filename_c = _dbus_string_get_const_data (&tmp_filename);

   /* TODO - support world-readable in an atomic fashion */
   hnd = CreateFileA (tmp_filename_c, GENERIC_WRITE,
                      FILE_SHARE_READ | FILE_SHARE_WRITE,
                      NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL,
                      INVALID_HANDLE_VALUE);
   if (hnd == INVALID_HANDLE_VALUE)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Could not create \"%s\": %s", filename_c, emsg);
       _dbus_win_free_error_string (emsg);
       goto out;
     }
   if (world_readable)
     {
       if (! _dbus_make_file_world_readable (&tmp_filename, error))
         goto out;
     }

   _dbus_verbose ("tmp file %s hnd %p opened\n", tmp_filename_c, hnd);

   need_unlink = TRUE;

   total = 0;
   bytes_to_write = _dbus_string_get_length (str);
   str_c = _dbus_string_get_const_data (str);

   while (total < bytes_to_write)
     {
       DWORD bytes_written;
       BOOL res;

       res = WriteFile (hnd, str_c + total, bytes_to_write - total,
                        &bytes_written, NULL);

       if (res == 0 || bytes_written <= 0)
         {
           char *emsg = _dbus_win_error_string (GetLastError ());
           dbus_set_error (error, _dbus_win_error_from_last_error (),
                            "Could not write to %s: %s", tmp_filename_c, emsg);
           _dbus_win_free_error_string (emsg);
           goto out;
         }

       total += bytes_written;
     }

   if (CloseHandle (hnd) == 0)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Could not close file %s: %s", tmp_filename_c, emsg);
       _dbus_win_free_error_string (emsg);
       goto out;
     }

   hnd = INVALID_HANDLE_VALUE;

   /* Unlike rename(), MoveFileEx() can replace existing files */
   if (!MoveFileExA (tmp_filename_c, filename_c, MOVEFILE_REPLACE_EXISTING))
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Could not rename %s to %s: %s",
                        tmp_filename_c, filename_c, emsg);
       _dbus_win_free_error_string (emsg);

       goto out;
     }

   need_unlink = FALSE;

   retval = TRUE;

  out:
   /* close first, then unlink */

   if (hnd != INVALID_HANDLE_VALUE)
     CloseHandle (hnd);

   if (need_unlink && DeleteFileA (tmp_filename_c) == 0)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       _dbus_verbose ("Failed to unlink temp file %s: %s", tmp_filename_c,
                      emsg);
       _dbus_win_free_error_string (emsg);
     }

   _dbus_string_free (&tmp_filename);

   if (!retval)
     _DBUS_ASSERT_ERROR_IS_SET (error);

   return retval;
 }


 /** Creates the given file, failing if the file already exists.
  *
  * @param filename the filename
  * @param error error location
  * @returns #TRUE if we created the file and it didn't exist
  */
 dbus_bool_t
 _dbus_create_file_exclusively (const DBusString *filename,
                                DBusError        *error)
 {
   HANDLE hnd;
   const char *filename_c;

   _DBUS_ASSERT_ERROR_IS_CLEAR (error);

   filename_c = _dbus_string_get_const_data (filename);

   hnd = CreateFileA (filename_c, GENERIC_WRITE,
                      FILE_SHARE_READ | FILE_SHARE_WRITE,
                      NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL,
                      INVALID_HANDLE_VALUE);
   if (hnd == INVALID_HANDLE_VALUE)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Could not create file %s: %s",
                        filename_c, emsg);
       _dbus_win_free_error_string (emsg);
       return FALSE;
     }

   _dbus_verbose ("exclusive file %s hnd %p opened\n", filename_c, hnd);

   if (CloseHandle (hnd) == 0)
     {
       char *emsg = _dbus_win_error_string (GetLastError ());
       dbus_set_error (error, _dbus_win_error_from_last_error (),
                        "Could not close file %s: %s",
                        filename_c, emsg);
       _dbus_win_free_error_string (emsg);

       return FALSE;
     }

   return TRUE;
 }
	/* -- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -- */
	/* dbus-file-win.c windows related file implementation (internal to D-Bus implementation)
	*
	* Copyright (C) 2002, 2003, 2006 Red Hat, Inc.
	* Copyright (C) 2003 CodeFactory AB
	*
	* Licensed under the Academic Free License version 2.1
	*
	* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*
	*/

	#include <config.h>
	#include "dbus-protocol.h"
	#include "dbus-string.h"
	#include "dbus-internals.h"
	#include "dbus-sysdeps-win.h"
	#include "dbus-pipe.h"

	#include <windows.h>


	/**
	* Thin wrapper around the read() system call that appends
	* the data it reads to the DBusString buffer. It appends
	* up to the given count.
	*
	* @param hnd the HANDLE to read from
	* @param buffer the buffer to append data to
	* @param count the amount of data to read
	* @param error place to set an error
	* @returns the number of bytes read or -1
	*/
	static int
	_dbus_file_read (HANDLE hnd,
	DBusString *buffer,
	int count,
	DBusError *error)
	{
	BOOL result;
	DWORD bytes_read;
	int start;
	char *data;

	_DBUS_ASSERT_ERROR_IS_CLEAR (error);

	_dbus_assert (count >= 0);

	start = _dbus_string_get_length (buffer);

	if (!_dbus_string_lengthen (buffer, count))
	{
	dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
	return -1;
	}

	data = _dbus_string_get_data_len (buffer, start, count);

	result = ReadFile (hnd, data, count, &bytes_read, NULL);
	if (result == 0)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Failed to read from 0x%x: %s", hnd, emsg);
	_dbus_win_free_error_string (emsg);
	return -1;
	}

	if (bytes_read)
	{
	/* put length back (doesn't actually realloc) */
	_dbus_string_set_length (buffer, start + bytes_read);

	#if 0
	if (bytes_read > 0)
	_dbus_verbose_bytes_of_string (buffer, start, bytes_read);
	#endif
	}

	return bytes_read;
	}


	/**
	* Appends the contents of the given file to the string,
	* returning error code. At the moment, won't open a file
	* more than a megabyte in size.
	*
	* @param str the string to append to
	* @param filename filename to load
	* @param error place to set an error
	* @returns #FALSE if error was set
	*/
	dbus_bool_t
	_dbus_file_get_contents (DBusString *str,
	const DBusString *filename,
	DBusError *error)
	{
	HANDLE hnd;
	DWORD fsize;
	DWORD fsize_hi;
	int orig_len;
	unsigned int total;
	const char *filename_c;

	_DBUS_ASSERT_ERROR_IS_CLEAR (error);

	filename_c = _dbus_string_get_const_data (filename);

	hnd = CreateFileA (filename_c, GENERIC_READ,
	FILE_SHARE_READ \| FILE_SHARE_WRITE,
	NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if (hnd == INVALID_HANDLE_VALUE)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Failed to open \"%s\": %s", filename_c, emsg);
	_dbus_win_free_error_string (emsg);
	return FALSE;
	}

	_dbus_verbose ("file %s hnd %p opened\n", filename_c, hnd);

	fsize = GetFileSize (hnd, &fsize_hi);
	if (fsize == 0xFFFFFFFF && GetLastError() != NO_ERROR)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Failed to get file size for \"%s\": %s",
	filename_c, emsg);
	_dbus_win_free_error_string (emsg);

	_dbus_verbose ("GetFileSize() failed: %s", emsg);

	CloseHandle (hnd);

	return FALSE;
	}

	if (fsize_hi != 0 \|\| fsize > _DBUS_ONE_MEGABYTE)
	{
	dbus_set_error (error, DBUS_ERROR_FAILED,
	"File size %lu/%lu of \"%s\" is too large.",
	(unsigned long) fsize_hi,
	(unsigned long) fsize, filename_c);
	CloseHandle (hnd);
	return FALSE;
	}

	total = 0;
	orig_len = _dbus_string_get_length (str);
	if (fsize > 0)
	{
	int bytes_read;

	while (total < fsize)
	{
	bytes_read = _dbus_file_read (hnd, str, fsize - total, error);
	if (bytes_read <= 0)
	{
	if (bytes_read == 0)
	{
	dbus_set_error (error, DBUS_ERROR_FAILED,
	"Premature EOF reading \"%s\"",
	filename_c);
	}
	else
	_DBUS_ASSERT_ERROR_IS_SET (error);

	CloseHandle (hnd);
	_dbus_string_set_length (str, orig_len);
	return FALSE;
	}
	else
	total += bytes_read;
	}

	CloseHandle (hnd);
	return TRUE;
	}
	else
	{
	CloseHandle (hnd);
	return TRUE;
	}
	}


	/**
	* Writes a string out to a file. If the file exists,
	* it will be atomically overwritten by the new data.
	*
	* @param str the string to write out
	* @param filename the file to save string to
	* @param world_readable if true, ensure file is world readable
	* @param error error to be filled in on failure
	* @returns #FALSE on failure
	*/
	dbus_bool_t
	_dbus_string_save_to_file (const DBusString *str,
	const DBusString *filename,
	dbus_bool_t world_readable,
	DBusError *error)
	{
	HANDLE hnd;
	int bytes_to_write;
	const char *filename_c;
	DBusString tmp_filename;
	const char *tmp_filename_c;
	int total;
	const char *str_c;
	dbus_bool_t need_unlink;
	dbus_bool_t retval;

	_DBUS_ASSERT_ERROR_IS_CLEAR (error);

	hnd = INVALID_HANDLE_VALUE;
	retval = FALSE;
	need_unlink = FALSE;

	if (!_dbus_string_init (&tmp_filename))
	{
	dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
	return FALSE;
	}

	if (!_dbus_string_copy (filename, 0, &tmp_filename, 0))
	{
	dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
	_dbus_string_free (&tmp_filename);
	return FALSE;
	}

	if (!_dbus_string_append (&tmp_filename, "."))
	{
	dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
	_dbus_string_free (&tmp_filename);
	return FALSE;
	}

	#define N_TMP_FILENAME_RANDOM_BYTES 8
	if (!_dbus_generate_random_ascii (&tmp_filename, N_TMP_FILENAME_RANDOM_BYTES,
	error))
	{
	_dbus_string_free (&tmp_filename);
	return FALSE;
	}

	filename_c = _dbus_string_get_const_data (filename);
	tmp_filename_c = _dbus_string_get_const_data (&tmp_filename);

	/* TODO - support world-readable in an atomic fashion */
	hnd = CreateFileA (tmp_filename_c, GENERIC_WRITE,
	FILE_SHARE_READ \| FILE_SHARE_WRITE,
	NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL,
	INVALID_HANDLE_VALUE);
	if (hnd == INVALID_HANDLE_VALUE)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not create \"%s\": %s", filename_c, emsg);
	_dbus_win_free_error_string (emsg);
	goto out;
	}
	if (world_readable)
	{
	if (! _dbus_make_file_world_readable (&tmp_filename, error))
	goto out;
	}

	_dbus_verbose ("tmp file %s hnd %p opened\n", tmp_filename_c, hnd);

	need_unlink = TRUE;

	total = 0;
	bytes_to_write = _dbus_string_get_length (str);
	str_c = _dbus_string_get_const_data (str);

	while (total < bytes_to_write)
	{
	DWORD bytes_written;
	BOOL res;

	res = WriteFile (hnd, str_c + total, bytes_to_write - total,
	&bytes_written, NULL);

	if (res == 0 \|\| bytes_written <= 0)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not write to %s: %s", tmp_filename_c, emsg);
	_dbus_win_free_error_string (emsg);
	goto out;
	}

	total += bytes_written;
	}

	if (CloseHandle (hnd) == 0)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not close file %s: %s", tmp_filename_c, emsg);
	_dbus_win_free_error_string (emsg);
	goto out;
	}

	hnd = INVALID_HANDLE_VALUE;

	/* Unlike rename(), MoveFileEx() can replace existing files */
	if (!MoveFileExA (tmp_filename_c, filename_c, MOVEFILE_REPLACE_EXISTING))
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not rename %s to %s: %s",
	tmp_filename_c, filename_c, emsg);
	_dbus_win_free_error_string (emsg);

	goto out;
	}

	need_unlink = FALSE;

	retval = TRUE;

	out:
	/* close first, then unlink */

	if (hnd != INVALID_HANDLE_VALUE)
	CloseHandle (hnd);

	if (need_unlink && DeleteFileA (tmp_filename_c) == 0)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	_dbus_verbose ("Failed to unlink temp file %s: %s", tmp_filename_c,
	emsg);
	_dbus_win_free_error_string (emsg);
	}

	_dbus_string_free (&tmp_filename);

	if (!retval)
	_DBUS_ASSERT_ERROR_IS_SET (error);

	return retval;
	}


	/** Creates the given file, failing if the file already exists.
	*
	* @param filename the filename
	* @param error error location
	* @returns #TRUE if we created the file and it didn't exist
	*/
	dbus_bool_t
	_dbus_create_file_exclusively (const DBusString *filename,
	DBusError *error)
	{
	HANDLE hnd;
	const char *filename_c;

	_DBUS_ASSERT_ERROR_IS_CLEAR (error);

	filename_c = _dbus_string_get_const_data (filename);

	hnd = CreateFileA (filename_c, GENERIC_WRITE,
	FILE_SHARE_READ \| FILE_SHARE_WRITE,
	NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL,
	INVALID_HANDLE_VALUE);
	if (hnd == INVALID_HANDLE_VALUE)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not create file %s: %s",
	filename_c, emsg);
	_dbus_win_free_error_string (emsg);
	return FALSE;
	}

	_dbus_verbose ("exclusive file %s hnd %p opened\n", filename_c, hnd);

	if (CloseHandle (hnd) == 0)
	{
	char *emsg = _dbus_win_error_string (GetLastError ());
	dbus_set_error (error, _dbus_win_error_from_last_error (),
	"Could not close file %s: %s",
	filename_c, emsg);
	_dbus_win_free_error_string (emsg);

	return FALSE;
	}

	return TRUE;
	}