Sweden-Number/dlls/ntdll/unix/loadorder.c

449 lines
13 KiB
C

/*
* Dlls load order support
*
* Copyright 1999 Bertho Stultiens
* Copyright 2003 Alexandre Julliard
*
* This library 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.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "unix_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(module);
#define LOADORDER_ALLOC_CLUSTER 32 /* Allocate with 32 entries at a time */
struct module_loadorder
{
const WCHAR *modulename;
enum loadorder loadorder;
};
static struct
{
int count;
int alloc;
struct module_loadorder *order;
} env_list;
static const WCHAR separatorsW[] = {',',' ','\t',0};
static BOOL init_done;
/***************************************************************************
* cmp_sort_func (internal, static)
*
* Sorting and comparing function used in sort and search of loadorder
* entries.
*/
static int cmp_sort_func(const void *s1, const void *s2)
{
return wcsicmp( ((const struct module_loadorder *)s1)->modulename,
((const struct module_loadorder *)s2)->modulename );
}
/***************************************************************************
* get_basename
*
* Return the base name of a file name (i.e. remove the path components).
*/
static WCHAR *get_basename( WCHAR *name )
{
WCHAR *ptr;
if (name[0] && name[1] == ':') name += 2; /* strip drive specification */
if ((ptr = wcsrchr( name, '\\' ))) name = ptr + 1;
if ((ptr = wcsrchr( name, '/' ))) name = ptr + 1;
return name;
}
/***************************************************************************
* remove_dll_ext
*
* Remove extension if it is ".dll".
*/
static inline void remove_dll_ext( WCHAR *name )
{
static const WCHAR dllW[] = {'.','d','l','l',0};
WCHAR *p = wcsrchr( name, '.' );
if (p && !wcsicmp( p, dllW )) *p = 0;
}
/***************************************************************************
* debugstr_loadorder
*
* Return a loadorder in printable form.
*/
static const char *debugstr_loadorder( enum loadorder lo )
{
switch(lo)
{
case LO_DISABLED: return "";
case LO_NATIVE: return "n";
case LO_BUILTIN: return "b";
case LO_NATIVE_BUILTIN: return "n,b";
case LO_BUILTIN_NATIVE: return "b,n";
case LO_DEFAULT: return "default";
default: return "??";
}
}
/***************************************************************************
* parse_load_order
*
* Parses the loadorder options from the configuration and puts it into
* a structure.
*/
static enum loadorder parse_load_order( const WCHAR *order )
{
enum loadorder ret = LO_DISABLED;
while (*order)
{
order += wcsspn( order, separatorsW );
switch(*order)
{
case 'N': /* native */
case 'n':
if (ret == LO_DISABLED) ret = LO_NATIVE;
else if (ret == LO_BUILTIN) return LO_BUILTIN_NATIVE;
break;
case 'B': /* builtin */
case 'b':
if (ret == LO_DISABLED) ret = LO_BUILTIN;
else if (ret == LO_NATIVE) return LO_NATIVE_BUILTIN;
break;
}
order += wcscspn( order, separatorsW );
}
return ret;
}
/***************************************************************************
* add_load_order
*
* Adds an entry in the list of environment overrides.
*/
static void add_load_order( const struct module_loadorder *lo )
{
int i;
for(i = 0; i < env_list.count; i++)
{
if (!cmp_sort_func( lo, &env_list.order[i] ))
{
/* replace existing option */
env_list.order[i].loadorder = lo->loadorder;
return;
}
}
if (i >= env_list.alloc)
{
/* No space in current array, make it larger */
env_list.alloc += LOADORDER_ALLOC_CLUSTER;
env_list.order = realloc( env_list.order, env_list.alloc * sizeof(*lo) );
}
env_list.order[i].loadorder = lo->loadorder;
env_list.order[i].modulename = lo->modulename;
env_list.count++;
}
/***************************************************************************
* add_load_order_set
*
* Adds a set of entries in the list of command-line overrides from the key parameter.
*/
static void add_load_order_set( WCHAR *entry )
{
struct module_loadorder ldo;
WCHAR *end = wcschr( entry, '=' );
if (!end) return;
*end++ = 0;
ldo.loadorder = parse_load_order( end );
while (*entry)
{
entry += wcsspn( entry, separatorsW );
end = entry + wcscspn( entry, separatorsW );
if (*end) *end++ = 0;
if (*entry)
{
remove_dll_ext( entry );
ldo.modulename = entry;
add_load_order( &ldo );
entry = end;
}
}
}
/***************************************************************************
* init_load_order
*/
static void init_load_order(void)
{
WCHAR *entry, *next, *order;
const char *overrides = getenv( "WINEDLLOVERRIDES" );
init_done = TRUE;
if (!overrides) return;
order = entry = malloc( (strlen(overrides) + 1) * sizeof(WCHAR) );
ntdll_umbstowcs( overrides, strlen(overrides) + 1, order, strlen(overrides) + 1 );
while (*entry)
{
while (*entry == ';') entry++;
if (!*entry) break;
next = wcschr( entry, ';' );
if (next) *next++ = 0;
else next = entry + wcslen(entry);
add_load_order_set( entry );
entry = next;
}
/* sort the array for quick lookup */
if (env_list.count)
qsort(env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func);
/* note: we don't free the string because the stored module names point inside it */
}
/***************************************************************************
* get_env_load_order
*
* Get the load order for a given module from the WINEDLLOVERRIDES environment variable.
*/
static inline enum loadorder get_env_load_order( const WCHAR *module )
{
struct module_loadorder tmp, *res;
tmp.modulename = module;
/* some bsearch implementations (Solaris) are buggy when the number of items is 0 */
if (env_list.count &&
(res = bsearch(&tmp, env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func)))
return res->loadorder;
return LO_INVALID;
}
/***************************************************************************
* get_standard_key
*
* Return a handle to the standard DllOverrides registry section.
*/
static HANDLE get_standard_key(void)
{
static HANDLE std_key = (HANDLE)-1;
if (std_key == (HANDLE)-1)
{
/* @@ Wine registry key: HKCU\Software\Wine\DllOverrides */
if (open_hkcu_key( "Software\\Wine\\DllOverrides", &std_key )) std_key = 0;
}
return std_key;
}
/***************************************************************************
* get_app_key
*
* Get the registry key for the app-specific DllOverrides list.
*/
static HANDLE get_app_key( const WCHAR *app_name )
{
static const WCHAR dlloverridesW[] = {'\\','D','l','l','O','v','e','r','r','i','d','e','s',0};
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
HANDLE root;
static HANDLE app_key = (HANDLE)-1;
if (app_key != (HANDLE)-1) return app_key;
if (!open_hkcu_key( "Software\\Wine\\AppDefaults", &root ))
{
ULONG len = wcslen( app_name ) + ARRAY_SIZE(dlloverridesW);
nameW.Length = (len - 1) * sizeof(WCHAR);
nameW.Buffer = malloc( len * sizeof(WCHAR) );
wcscpy( nameW.Buffer, app_name );
wcscat( nameW.Buffer, dlloverridesW );
InitializeObjectAttributes( &attr, &nameW, 0, root, NULL );
/* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DllOverrides */
if (NtOpenKey( &app_key, KEY_ALL_ACCESS, &attr )) app_key = 0;
NtClose( root );
free( nameW.Buffer );
}
return app_key;
}
/***************************************************************************
* get_registry_value
*
* Load the registry loadorder value for a given module.
*/
static enum loadorder get_registry_value( HANDLE hkey, WCHAR *module )
{
UNICODE_STRING valueW;
char buffer[80];
DWORD count;
valueW.Length = wcslen( module ) * sizeof(WCHAR);
valueW.Buffer = module;
if (!NtQueryValueKey( hkey, &valueW, KeyValuePartialInformation,
buffer, sizeof(buffer), &count ))
{
WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
return parse_load_order( str );
}
return LO_INVALID;
}
/***************************************************************************
* get_load_order_value
*
* Get the load order for the exact specified module string, looking in:
* 1. The WINEDLLOVERRIDES environment variable
* 2. The per-application DllOverrides key
* 3. The standard DllOverrides key
*/
static enum loadorder get_load_order_value( HANDLE std_key, HANDLE app_key, WCHAR *module )
{
enum loadorder ret;
if ((ret = get_env_load_order( module )) != LO_INVALID)
{
TRACE( "got environment %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
return ret;
}
if (app_key && ((ret = get_registry_value( app_key, module )) != LO_INVALID))
{
TRACE( "got app defaults %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
return ret;
}
if (std_key && ((ret = get_registry_value( std_key, module )) != LO_INVALID))
{
TRACE( "got standard key %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
return ret;
}
return ret;
}
/***************************************************************************
* get_load_order (internal)
*
* Return the loadorder of a module.
* The system directory and '.dll' extension is stripped from the path.
*/
enum loadorder get_load_order( const UNICODE_STRING *nt_name )
{
static const WCHAR prefixW[] = {'\\','?','?','\\'};
enum loadorder ret = LO_INVALID;
HANDLE std_key, app_key = 0;
const WCHAR *path = nt_name->Buffer;
const WCHAR *p, *app_name = NULL;
WCHAR *module, *basename;
int len;
if (!init_done) init_load_order();
std_key = get_standard_key();
if (NtCurrentTeb()->Peb->ImageBaseAddress)
{
app_name = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
if ((p = wcsrchr( app_name, '\\' ))) app_name = p + 1;
app_key = get_app_key( app_name );
}
if (!wcsncmp( path, prefixW, 4 )) path += 4;
TRACE("looking for %s\n", debugstr_w(path));
/* Strip path information if the module resides in the system directory
*/
if (!wcsnicmp( system_dir + 4, path, wcslen(system_dir) - 4 ))
{
p = path + wcslen( system_dir ) - 4;
while (*p == '\\' || *p == '/') p++;
if (!wcschr( p, '\\' ) && !wcschr( p, '/' )) path = p;
}
if (!(len = wcslen(path))) return ret;
if (!(module = malloc( (len + 2) * sizeof(WCHAR) ))) return ret;
wcscpy( module + 1, path ); /* reserve module[0] for the wildcard char */
remove_dll_ext( module + 1 );
basename = get_basename( module + 1 );
/* first explicit module name */
if ((ret = get_load_order_value( std_key, app_key, module+1 )) != LO_INVALID)
goto done;
/* then module basename preceded by '*' */
basename[-1] = '*';
if ((ret = get_load_order_value( std_key, app_key, basename-1 )) != LO_INVALID)
goto done;
/* then module basename without '*' (only if explicit path) */
if (basename != module+1 && ((ret = get_load_order_value( std_key, app_key, basename )) != LO_INVALID))
goto done;
/* if loading the main exe with an explicit path, try native first */
if (!app_name && basename != module+1)
{
ret = LO_NATIVE_BUILTIN;
TRACE( "got main exe default %s for %s\n", debugstr_loadorder(ret), debugstr_w(path) );
goto done;
}
/* and last the hard-coded default */
ret = LO_DEFAULT;
TRACE( "got hardcoded %s for %s\n", debugstr_loadorder(ret), debugstr_w(path) );
done:
free( module );
return ret;
}