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w32-util.c
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/* w32-util.c - Utility functions for the W32 API
* Copyright (C) 1999 Free Software Foundation, Inc
* Copyright (C) 2001 Werner Koch (dd9jn)
* Copyright (C) 2001, 2002 g10 Code GmbH
*
* This file is part of GPGME.
*
* GPGME 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.
*
* GPGME 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <signal.h>
#include <fcntl.h>
#include <windows.h>
#include <io.h>
#include "util.h"
DEFINE_STATIC_LOCK (get_path_lock);
/* Return a string from the Win32 Registry or NULL in case of error.
Caller must release the return value. A NULL for root is an alias
for HKEY_CURRENT_USER. */
static char *
read_w32_registry_string (const char *root, const char *dir, const char *name)
{
HKEY root_key, key_handle;
DWORD n1, nbytes;
char *result = NULL;
if (!root)
root_key = HKEY_CURRENT_USER;
else if (!strcmp (root, "HKEY_CLASSES_ROOT"))
root_key = HKEY_CLASSES_ROOT;
else if (!strcmp (root, "HKEY_CURRENT_USER"))
root_key = HKEY_CURRENT_USER;
else if (!strcmp (root, "HKEY_LOCAL_MACHINE"))
root_key = HKEY_LOCAL_MACHINE;
else if (!strcmp (root, "HKEY_USERS"))
root_key = HKEY_USERS;
else if (!strcmp (root, "HKEY_PERFORMANCE_DATA"))
root_key = HKEY_PERFORMANCE_DATA;
else if (!strcmp (root, "HKEY_CURRENT_CONFIG"))
root_key = HKEY_CURRENT_CONFIG;
else
return NULL;
if (RegOpenKeyEx (root_key, dir, 0, KEY_READ, &key_handle))
return NULL; /* No need for a RegClose, so return directly. */
nbytes = 1;
if (RegQueryValueEx (key_handle, name, 0, NULL, NULL, &nbytes))
goto leave;
n1 = nbytes + 1;
result = xtrymalloc (n1);
if (!result)
goto leave;
if (RegQueryValueEx (key_handle, name, 0, NULL, result, &n1))
{
xfree(result);
result = NULL;
goto leave;
}
result[nbytes] = 0; /* Make sure it is really a string. */
leave:
RegCloseKey (key_handle);
return result;
}
static const char *
find_program_in_registry (const char *name)
{
char *program = NULL;
program = read_w32_registry_string (NULL, "Software\\GNU\\GnuPG", name);
if (program)
{
int i;
DEBUG1 ("found %s in registry: `%s'", name, program);
for (i = 0; program[i]; i++)
{
if (program[i] == '/')
program[i] = '\\';
}
}
return program;
}
const char *
_gpgme_get_gpg_path (void)
{
static char *gpg_program;
LOCK (get_path_lock);
if (!gpg_program)
gpg_program = find_program_in_registry ("gpgProgram");
#ifdef GPG_PATH
if (!gpg_program)
gpg_program = GPG_PATH;
#endif
UNLOCK (get_path_lock);
return gpg_program;
}
const char *
_gpgme_get_gpgsm_path (void)
{
static char *gpgsm_program;
LOCK (get_path_lock);
if (!gpgsm_program)
gpgsm_program = find_program_in_registry ("gpgsmProgram");
#ifdef GPGSM_PATH
if (!gpgsm_program)
gpgsm_program = GPGSM_PATH;
#endif
UNLOCK (get_path_lock);
return gpgsm_program;
}

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