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Sweden-Number/dlls/ntdll/loadorder.c

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/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"
#include "winternl.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(module);
#define LOADORDER_ALLOC_CLUSTER 32 /* Allocate with 32 entries at a time */
typedef struct module_loadorder
{
const WCHAR *modulename;
enum loadorder_type loadorder[LOADORDER_NTYPES];
} module_loadorder_t;
struct loadorder_list
{
int count;
int alloc;
module_loadorder_t *order;
};
/* dll to load as builtins if not explicitly specified otherwise */
/* the list must remain sorted by dll name */
static const WCHAR default_builtins[][16] =
{
{ 'g','d','i','3','2',0 },
{ 'i','c','m','p',0 },
{ 'k','e','r','n','e','l','3','2',0 },
{ 'm','m','s','y','s','t','e','m',0 },
{ 'n','t','d','l','l',0 },
{ 'o','d','b','c','3','2',0 },
{ 's','o','u','n','d',0 },
{ 't','t','y','d','r','v',0 },
{ 'u','s','e','r','3','2',0 },
{ 'w','3','2','s','k','r','n','l',0 },
{ 'w','3','2','s','y','s',0 },
{ 'w','i','n','3','2','s','1','6',0 },
{ 'w','i','n','a','s','p','i',0 },
{ 'w','i','n','e','d','o','s',0 },
{ 'w','i','n','e','p','s','1','6','.','d','r','v',0 },
{ 'w','i','n','e','p','s',0 },
{ 'w','i','n','m','m',0 },
{ 'w','i','n','s','o','c','k',0 },
{ 'w','n','a','s','p','i','3','2',0 },
{ 'w','o','w','3','2',0 },
{ 'w','s','2','_','3','2',0 },
{ 'w','s','o','c','k','3','2',0 },
{ 'x','1','1','d','r','v',0 }
};
/* default if nothing else specified */
static const enum loadorder_type default_loadorder[LOADORDER_NTYPES] =
{
LOADORDER_BI, LOADORDER_DLL, 0
};
/* default for modules with an explicit path */
static const enum loadorder_type default_path_loadorder[LOADORDER_NTYPES] =
{
LOADORDER_DLL, LOADORDER_BI, 0
};
static const WCHAR separatorsW[] = {',',' ','\t',0};
static int init_done;
static struct loadorder_list env_list;
/***************************************************************************
* 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 strcmpiW(((module_loadorder_t *)s1)->modulename, ((module_loadorder_t *)s2)->modulename);
}
/***************************************************************************
* strcmp_func
*/
static int strcmp_func(const void *s1, const void *s2)
{
return strcmpiW( (WCHAR *)s1, (WCHAR *)s2 );
}
/***************************************************************************
* get_basename
*
* Return the base name of a file name (i.e. remove the path components).
*/
static const WCHAR *get_basename( const WCHAR *name )
{
const WCHAR *ptr;
if (name[0] && name[1] == ':') name += 2; /* strip drive specification */
if ((ptr = strrchrW( name, '\\' ))) name = ptr + 1;
if ((ptr = strrchrW( name, '/' ))) name = ptr + 1;
return name;
}
/***************************************************************************
* remove_dll_ext
*
* Remove extension if it is ".dll".
*/
static inline void remove_dll_ext( WCHAR *ext )
{
if (ext[0] == '.' &&
toupperW(ext[1]) == 'D' &&
toupperW(ext[2]) == 'L' &&
toupperW(ext[3]) == 'L' &&
!ext[4]) ext[0] = 0;
}
/***************************************************************************
* debugstr_loadorder
*
* Return a loadorder in printable form.
*/
static const char *debugstr_loadorder( enum loadorder_type lo[] )
{
int i;
char buffer[LOADORDER_NTYPES*3+1];
buffer[0] = 0;
for(i = 0; i < LOADORDER_NTYPES; i++)
{
if (lo[i] == LOADORDER_INVALID) break;
switch(lo[i])
{
case LOADORDER_DLL: strcat( buffer, "n," ); break;
case LOADORDER_BI: strcat( buffer, "b," ); break;
default: strcat( buffer, "?," ); break;
}
}
if (buffer[0]) buffer[strlen(buffer)-1] = 0;
return debugstr_a(buffer);
}
/***************************************************************************
* append_load_order
*
* Append a load order to the list if necessary.
*/
static void append_load_order(enum loadorder_type lo[], enum loadorder_type append)
{
int i;
for (i = 0; i < LOADORDER_NTYPES; i++)
{
if (lo[i] == LOADORDER_INVALID) /* append it here */
{
lo[i++] = append;
lo[i] = LOADORDER_INVALID;
return;
}
if (lo[i] == append) return; /* already in the list */
}
assert(0); /* cannot get here */
}
/***************************************************************************
* parse_load_order
*
* Parses the loadorder options from the configuration and puts it into
* a structure.
*/
static void parse_load_order( const WCHAR *order, enum loadorder_type lo[] )
{
lo[0] = LOADORDER_INVALID;
while (*order)
{
order += strspnW( order, separatorsW );
switch(*order)
{
case 'N': /* Native */
case 'n':
append_load_order( lo, LOADORDER_DLL );
break;
case 'B': /* Builtin */
case 'b':
append_load_order( lo, LOADORDER_BI );
break;
}
order += strcspnW( order, separatorsW );
}
}
/***************************************************************************
* add_load_order
*
* Adds an entry in the list of environment overrides.
*/
static void add_load_order( const module_loadorder_t *plo )
{
int i;
for(i = 0; i < env_list.count; i++)
{
if(!cmp_sort_func(plo, &env_list.order[i] ))
{
/* replace existing option */
memcpy( env_list.order[i].loadorder, plo->loadorder, sizeof(plo->loadorder));
return;
}
}
if (i >= env_list.alloc)
{
/* No space in current array, make it larger */
env_list.alloc += LOADORDER_ALLOC_CLUSTER;
if (env_list.order)
env_list.order = RtlReAllocateHeap(GetProcessHeap(), 0, env_list.order,
env_list.alloc * sizeof(module_loadorder_t));
else
env_list.order = RtlAllocateHeap(GetProcessHeap(), 0,
env_list.alloc * sizeof(module_loadorder_t));
if(!env_list.order)
{
MESSAGE("Virtual memory exhausted\n");
exit(1);
}
}
memcpy(env_list.order[i].loadorder, plo->loadorder, sizeof(plo->loadorder));
env_list.order[i].modulename = plo->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 )
{
module_loadorder_t ldo;
WCHAR *end = strchrW( entry, '=' );
if (!end) return;
*end++ = 0;
parse_load_order( end, ldo.loadorder );
while (*entry)
{
entry += strspnW( entry, separatorsW );
end = entry + strcspnW( entry, separatorsW );
if (*end) *end++ = 0;
if (*entry)
{
WCHAR *ext = strrchrW(entry, '.');
if (ext) remove_dll_ext( ext );
ldo.modulename = entry;
add_load_order( &ldo );
entry = end;
}
}
}
/***************************************************************************
* init_load_order
*/
static void init_load_order(void)
{
const char *order = getenv( "WINEDLLOVERRIDES" );
UNICODE_STRING strW;
WCHAR *entry, *next;
init_done = 1;
if (!order) return;
if (!strcmp( order, "help" ))
{
MESSAGE( "Syntax:\n"
" WINEDLLOVERRIDES=\"entry;entry;entry...\"\n"
" where each entry is of the form:\n"
" module[,module...]={native|builtin}[,{b|n}]\n"
"\n"
" Only the first letter of the override (native or builtin)\n"
" is significant.\n\n"
"Example:\n"
" WINEDLLOVERRIDES=\"comdlg32,commdlg=n,b;shell,shell32=b\"\n" );
exit(0);
}
RtlCreateUnicodeStringFromAsciiz( &strW, order );
entry = strW.Buffer;
while (*entry)
{
while (*entry && *entry == ';') entry++;
if (!*entry) break;
next = strchrW( entry, ';' );
if (next) *next++ = 0;
else next = entry + strlenW(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 Unicode 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 BOOL get_env_load_order( const WCHAR *module, enum loadorder_type lo[] )
{
module_loadorder_t tmp, *res = NULL;
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)))
memcpy( lo, res->loadorder, sizeof(res->loadorder) );
return (res != NULL);
}
/***************************************************************************
* get_default_load_order
*
* Get the load order for a given module from the default list.
*/
static inline BOOL get_default_load_order( const WCHAR *module, enum loadorder_type lo[] )
{
const int count = sizeof(default_builtins) / sizeof(default_builtins[0]);
if (!bsearch( module, default_builtins, count, sizeof(default_builtins[0]), strcmp_func ))
return FALSE;
lo[0] = LOADORDER_BI;
lo[1] = LOADORDER_INVALID;
return TRUE;
}
/***************************************************************************
* open_app_key
*
* Open the registry key to the app-specific DllOverrides list.
*/
static HKEY open_app_key( const WCHAR *app_name, const WCHAR *module )
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
HKEY hkey;
WCHAR *str;
static const WCHAR AppDefaultsW[] = {'M','a','c','h','i','n','e','\\',
'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\',
'W','i','n','e','\\',
'C','o','n','f','i','g','\\',
'A','p','p','D','e','f','a','u','l','t','s','\\',0};
static const WCHAR DllOverridesW[] = {'\\','D','l','l','O','v','e','r','r','i','d','e','s',0};
str = RtlAllocateHeap( GetProcessHeap(), 0,
sizeof(AppDefaultsW) + sizeof(DllOverridesW) +
strlenW(app_name) * sizeof(WCHAR) );
if (!str) return 0;
strcpyW( str, AppDefaultsW );
strcatW( str, app_name );
strcatW( str, DllOverridesW );
TRACE( "searching %s in %s\n", debugstr_w(module), debugstr_w(str) );
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &nameW, str );
if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) hkey = 0;
RtlFreeHeap( GetProcessHeap(), 0, str );
return hkey;
}
/***************************************************************************
* get_registry_value
*
* Load the registry loadorder value for a given module.
*/
static BOOL get_registry_value( HKEY hkey, const WCHAR *module, enum loadorder_type lo[] )
{
UNICODE_STRING valueW;
char buffer[80];
DWORD count;
BOOL ret;
RtlInitUnicodeString( &valueW, module );
if ((ret = !NtQueryValueKey( hkey, &valueW, KeyValuePartialInformation,
buffer, sizeof(buffer), &count )))
{
int i, n = 0;
WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
while (*str)
{
enum loadorder_type type = LOADORDER_INVALID;
while (*str == ',' || isspaceW(*str)) str++;
if (!*str) break;
switch(tolowerW(*str))
{
case 'n': type = LOADORDER_DLL; break;
case 'b': type = LOADORDER_BI; break;
case 's': break; /* no longer supported, ignore */
case 0: break; /* end of string */
default:
ERR("Invalid load order module-type %s, ignored\n", debugstr_w(str));
break;
}
if (type != LOADORDER_INVALID)
{
for (i = 0; i < n; i++) if (lo[i] == type) break; /* already specified */
if (i == n) lo[n++] = type;
}
while (*str && *str != ',' && !isspaceW(*str)) str++;
}
lo[n] = LOADORDER_INVALID;
}
return ret;
}
/***************************************************************************
* MODULE_GetSystemDirectory
*
* Retrieve the system directory. The string must be freed by the caller.
*/
BOOL MODULE_GetSystemDirectory( UNICODE_STRING *sysdir )
{
static const WCHAR winsysdirW[] = {'w','i','n','s','y','s','d','i','r',0};
UNICODE_STRING name;
RtlInitUnicodeString( &name, winsysdirW );
sysdir->MaximumLength = 0;
if (RtlQueryEnvironmentVariable_U( NULL, &name, sysdir ) != STATUS_BUFFER_TOO_SMALL)
return FALSE;
sysdir->MaximumLength = sysdir->Length + sizeof(WCHAR);
if (!(sysdir->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, sysdir->MaximumLength )))
return FALSE;
if (RtlQueryEnvironmentVariable_U( NULL, &name, sysdir ) == STATUS_SUCCESS)
return TRUE;
RtlFreeUnicodeString( sysdir );
return FALSE;
}
/***************************************************************************
* MODULE_GetLoadOrderW (internal)
*
* Locate the loadorder of a module.
* Any path is stripped from the path-argument and so are the extension
* '.dll' and '.exe'. A lookup in the table can yield an override for
* the specific dll. Otherwise the default load order is returned.
*/
void MODULE_GetLoadOrderW( enum loadorder_type loadorder[], const WCHAR *app_name,
const WCHAR *path, BOOL win32 )
{
static const WCHAR DllOverridesW[] = {'M','a','c','h','i','n','e','\\',
'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\',
'W','i','n','e','\\',
'C','o','n','f','i','g','\\',
'D','l','l','O','v','e','r','r','i','d','e','s',0};
static HKEY std_key = (HKEY)-1; /* key to standard section, cached */
HKEY app_key = 0;
WCHAR *module, *basename;
int len;
if (!init_done) init_load_order();
TRACE("looking for %s\n", debugstr_w(path));
loadorder[0] = LOADORDER_INVALID; /* in case something bad happens below */
/* Strip path information if the module resides in the system directory
* (path is already stripped by caller for 16-bit modules)
*/
if (win32)
{
UNICODE_STRING path_str, sysdir;
if (!MODULE_GetSystemDirectory( &sysdir )) return;
RtlInitUnicodeString( &path_str, path );
if (RtlPrefixUnicodeString( &sysdir, &path_str, TRUE ))
{
const WCHAR *p = path + sysdir.Length / sizeof(WCHAR);
while (*p == '\\' || *p == '/') p++;
if (!strchrW( p, '\\' ) && !strchrW( p, '/' )) path = p;
}
RtlFreeUnicodeString( &sysdir );
}
if (!(len = strlenW(path))) return;
if (!(module = RtlAllocateHeap( GetProcessHeap(), 0, (len + 2) * sizeof(WCHAR) ))) return;
strcpyW( module+1, path ); /* reserve module[0] for the wildcard char */
if (len >= 4) remove_dll_ext( module + 1 + len - 4 );
/* check environment variable first */
if (get_env_load_order( module+1, loadorder ))
{
TRACE( "got environment %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* then explicit module name in AppDefaults */
if (app_name)
{
app_key = open_app_key( app_name, module+1 );
if (app_key && get_registry_value( app_key, module+1, loadorder ))
{
TRACE( "got app defaults %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
}
/* then explicit module name in standard section */
if (std_key == (HKEY)-1)
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING nameW;
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
RtlInitUnicodeString( &nameW, DllOverridesW );
if (NtOpenKey( &std_key, KEY_ALL_ACCESS, &attr )) std_key = 0;
}
if (std_key && get_registry_value( std_key, module+1, loadorder ))
{
TRACE( "got standard entry %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* then module basename preceded by '*' in AppDefaults */
basename = (WCHAR *)get_basename( module+1 );
basename[-1] = '*';
if (app_key && get_registry_value( app_key, basename-1, loadorder ))
{
TRACE( "got app defaults basename %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* then module name preceded by '*' in standard section */
if (std_key && get_registry_value( std_key, basename-1, loadorder ))
{
TRACE( "got standard base name %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* then base name matching compiled-in defaults */
if (get_default_load_order( basename, loadorder ))
{
TRACE( "got compiled-in default %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
if (basename == module+1)
{
static const WCHAR wildcardW[] = {'*',0};
/* then wildcard entry in AppDefaults (only if no explicit path) */
if (app_key && get_registry_value( app_key, wildcardW, loadorder ))
{
TRACE( "got app defaults wildcard %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* then wildcard entry in standard section (only if no explicit path) */
if (std_key && get_registry_value( std_key, wildcardW, loadorder ))
{
TRACE( "got standard wildcard %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
goto done;
}
/* and last the hard-coded default */
memcpy( loadorder, default_loadorder, sizeof(default_loadorder) );
TRACE( "got hardcoded default %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
}
else /* module contains an explicit path */
{
memcpy( loadorder, default_path_loadorder, sizeof(default_path_loadorder) );
TRACE( "got hardcoded path default %s for %s\n",
debugstr_loadorder(loadorder), debugstr_w(path) );
}
done:
if (app_key) NtClose( app_key );
RtlFreeHeap( GetProcessHeap(), 0, module );
}
/***************************************************************************
* MODULE_GetLoadOrderA (internal)
*
* Locate the loadorder of a module.
* Any path is stripped from the path-argument and so are the extension
* '.dll' and '.exe'. A lookup in the table can yield an override for
* the specific dll. Otherwise the default load order is returned.
*
* FIXME: should be removed, everything should be Unicode.
*/
void MODULE_GetLoadOrderA( enum loadorder_type loadorder[], const WCHAR *app_name,
const char *path, BOOL win32 )
{
UNICODE_STRING pathW;
RtlCreateUnicodeStringFromAsciiz( &pathW, path );
MODULE_GetLoadOrderW( loadorder, app_name, pathW.Buffer, win32 );
RtlFreeUnicodeString( &pathW );
}
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