/* init.c - Initialize the GnuPG error library.
Copyright (C) 2005, 2010 g10 Code GmbH
This file is part of libgpg-error.
libgpg-error is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
libgpg-error 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "gpgrt-int.h"
#include "gettext.h"
#include "init.h"
#ifdef HAVE_W32CE_SYSTEM
# include "mkw32errmap.map.c" /* Generated map_w32codes () */
# ifndef TLS_OUT_OF_INDEXES
# define TLS_OUT_OF_INDEXES 0xFFFFFFFF
# endif
# ifndef __MINGW32CE__
# /* Replace the Mingw32CE provided abort function. */
# define abort() do { TerminateProcess (GetCurrentProcess(), 8); } while (0)
# endif
#endif
/* Locale directory support. */
#if HAVE_W32_SYSTEM
#include <windows.h>
static int tls_index = TLS_OUT_OF_INDEXES; /* Index for the TLS functions. */
static char *get_locale_dir (void);
static void drop_locale_dir (char *locale_dir);
#else /*!HAVE_W32_SYSTEM*/
#define get_locale_dir() LOCALEDIR
#define drop_locale_dir(dir)
#endif /*!HAVE_W32_SYSTEM*/
/* The realloc function as set by gpgrt_set_alloc_func. */
static void *(*custom_realloc)(void *a, size_t n);
static void
real_init (void)
{
#ifdef ENABLE_NLS
char *locale_dir;
/* We only have to bind our locale directory to our text domain. */
locale_dir = get_locale_dir ();
if (locale_dir)
{
bindtextdomain (PACKAGE, locale_dir);
drop_locale_dir (locale_dir);
}
#endif
_gpgrt_es_init ();
}
/* Initialize the library. This function should be run early. */
gpg_error_t
_gpg_err_init (void)
{
#ifdef HAVE_W32_SYSTEM
# ifdef DLL_EXPORT
/* We always have a constructor and thus this function is called
automatically. Due to the way the C init code of mingw works,
the constructors are called before our DllMain function is
called. The problem with that is that the TLS has not been setup
and w32-gettext.c requires TLS. To solve this we do nothing here
but call the actual init code from our DllMain. */
# else /*!DLL_EXPORT*/
/* Note that if the TLS is actually used, we can't release the TLS
as there is no way to know when a thread terminates (i.e. no
thread-specific-atexit). You are really better off to use the
DLL! */
if (tls_index == TLS_OUT_OF_INDEXES)
{
tls_index = TlsAlloc ();
if (tls_index == TLS_OUT_OF_INDEXES)
{
/* No way to continue - commit suicide. */
abort ();
}
_gpg_w32__init_gettext_module ();
real_init ();
}
# endif /*!DLL_EXPORT*/
#else
real_init ();
#endif
return 0;
}
/* Deinitialize libgpg-error. This function is only used in special
circumstances. No gpg-error function should be used after this
function has been called. A value of 0 passed for MODE
deinitializes the entire libgpg-error, a value of 1 releases
resources allocated for the current thread and only that thread may
not anymore access libgpg-error after such a call. Under Windows
this function may be called from the DllMain function of a DLL
which statically links to libgpg-error. */
void
_gpg_err_deinit (int mode)
{
#if defined (HAVE_W32_SYSTEM) && !defined(DLL_EXPORT)
struct tls_space_s *tls;
tls = TlsGetValue (tls_index);
if (tls)
{
TlsSetValue (tls_index, NULL);
LocalFree (tls);
}
if (mode == 0)
{
TlsFree (tls_index);
tls_index = TLS_OUT_OF_INDEXES;
}
#else
(void)mode;
#endif
}
/* Register F as allocation function. This function is used for all
APIs which return an allocated buffer. F needs to have standard
realloc semantics. It should be called as early as possible and
not changed later. */
void
_gpgrt_set_alloc_func (void *(*f)(void *a, size_t n))
{
custom_realloc = f;
}
/* The realloc to be used for data returned by the public API. */
void *
_gpgrt_realloc (void *a, size_t n)
{
if (custom_realloc)
return custom_realloc (a, n);
if (!n)
{
free (a);
return NULL;
}
if (!a)
return malloc (n);
return realloc (a, n);
}
/* The malloc to be used for data returned by the public API. */
void *
_gpgrt_malloc (size_t n)
{
if (!n)
n++;
return _gpgrt_realloc (NULL, n);
}
/* The free to be used for data returned by the public API. */
void
_gpgrt_free (void *a)
{
_gpgrt_realloc (a, 0);
}
void
_gpg_err_set_errno (int err)
{
#ifdef HAVE_W32CE_SYSTEM
SetLastError (err);
#else /*!HAVE_W32CE_SYSTEM*/
errno = err;
#endif /*!HAVE_W32CE_SYSTEM*/
}
#ifdef HAVE_W32_SYSTEM
/*****************************************
******** Below is only Windows code. ****
*****************************************/
static char *
get_locale_dir (void)
{
static wchar_t moddir[MAX_PATH+5];
char *result, *p;
int nbytes;
if (!GetModuleFileNameW (NULL, moddir, MAX_PATH))
*moddir = 0;
#define SLDIR "\\share\\locale"
if (*moddir)
{
nbytes = WideCharToMultiByte (CP_UTF8, 0, moddir, -1, NULL, 0, NULL, NULL);
if (nbytes < 0)
return NULL;
result = malloc (nbytes + strlen (SLDIR) + 1);
if (result)
{
nbytes = WideCharToMultiByte (CP_UTF8, 0, moddir, -1,
result, nbytes, NULL, NULL);
if (nbytes < 0)
{
free (result);
result = NULL;
}
else
{
p = strrchr (result, '\\');
if (p)
*p = 0;
/* If we are installed below "bin" strip that part and
use the top directory instead.
Background: Under Windows we don't install GnuPG
below bin/ but in the top directory with only share/,
lib/, and etc/ below it. One of the reasons is to
keep the the length of the filenames at bay so not to
increase the limited length of the PATH envvar.
Another and more important reason, however, is that
the very first GPG versions on W32 were installed
into a flat directory structure and for best
compatibility with these versions we didn't changed
that later. For WindowsCE we can right away install
it under bin, though. The hack with detection of the
bin directory part allows us to eventually migrate to
such a directory layout under plain Windows without
the need to change libgpg-error. */
p = strrchr (result, '\\');
if (p && !strcmp (p+1, "bin"))
*p = 0;
/* Append the static part. */
strcat (result, SLDIR);
}
}
}
else /* Use the old default value. */
{
result = malloc (10 + strlen (SLDIR) + 1);
if (result)
{
strcpy (result, "c:\\gnupg");
strcat (result, SLDIR);
}
}
#undef SLDIR
return result;
}
static void
drop_locale_dir (char *locale_dir)
{
free (locale_dir);
}
/* Return the tls object. This function is guaranteed to return a
valid non-NULL object. */
struct tls_space_s *
get_tls (void)
{
struct tls_space_s *tls;
tls = TlsGetValue (tls_index);
if (!tls)
{
/* Called by a thread which existed before this DLL was loaded.
Allocate the space. */
tls = LocalAlloc (LPTR, sizeof *tls);
if (!tls)
{
/* No way to continue - commit suicide. */
abort ();
}
tls->gt_use_utf8 = 0;
TlsSetValue (tls_index, tls);
}
return tls;
}
/* Return the value of the ERRNO variable. This needs to be a
function so that we can have a per-thread ERRNO. This is used only
on WindowsCE because that OS misses an errno. */
#ifdef HAVE_W32CE_SYSTEM
int
_gpg_w32ce_get_errno (void)
{
return map_w32codes ( GetLastError () );
}
#endif /*HAVE_W32CE_SYSTEM*/
/* Replacement strerror function for WindowsCE. */
#ifdef HAVE_W32CE_SYSTEM
char *
_gpg_w32ce_strerror (int err)
{
struct tls_space_s *tls = get_tls ();
wchar_t tmpbuf[STRBUFFER_SIZE];
int n;
if (err == -1)
err = _gpg_w32ce_get_errno ();
/* Note: On a German HTC Touch Pro2 device I also tried
LOCALE_USER_DEFAULT and LOCALE_SYSTEM_DEFAULT - both returned
English messages. */
if (FormatMessageW (FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
tmpbuf, STRBUFFER_SIZE -1,
NULL))
{
n = WideCharToMultiByte (CP_UTF8, 0, tmpbuf, -1,
tls->strerror_buffer,
sizeof tls->strerror_buffer -1,
NULL, NULL);
}
else
n = -1;
if (n < 0)
snprintf (tls->strerror_buffer, sizeof tls->strerror_buffer -1,
"[w32err=%d]", err);
return tls->strerror_buffer;
}
#endif /*HAVE_W32CE_SYSTEM*/
/* Entry point called by the DLL loader. */
#ifdef DLL_EXPORT
int WINAPI
DllMain (HINSTANCE hinst, DWORD reason, LPVOID reserved)
{
struct tls_space_s *tls;
(void)reserved;
(void)hinst;
switch (reason)
{
case DLL_PROCESS_ATTACH:
tls_index = TlsAlloc ();
if (tls_index == TLS_OUT_OF_INDEXES)
return FALSE;
#ifndef _GPG_ERR_HAVE_CONSTRUCTOR
/* If we have not constructors (e.g. MSC) we call it here. */
_gpg_w32__init_gettext_module ();
#endif
/* falltru. */
case DLL_THREAD_ATTACH:
tls = LocalAlloc (LPTR, sizeof *tls);
if (!tls)
return FALSE;
tls->gt_use_utf8 = 0;
TlsSetValue (tls_index, tls);
if (reason == DLL_PROCESS_ATTACH)
{
real_init ();
}
break;
case DLL_THREAD_DETACH:
tls = TlsGetValue (tls_index);
if (tls)
LocalFree (tls);
break;
case DLL_PROCESS_DETACH:
tls = TlsGetValue (tls_index);
if (tls)
LocalFree (tls);
TlsFree (tls_index);
break;
default:
break;
}
return TRUE;
}
#endif /*DLL_EXPORT*/
#endif /*HAVE_W32_SYSTEM*/