490 lines
14 KiB
C
490 lines
14 KiB
C
/*
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* Dlls load order support
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*
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* Copyright 1999 Bertho Stultiens
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* Copyright 2003 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "windef.h"
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#include "winternl.h"
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#include "ntdll_misc.h"
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#include "wine/debug.h"
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#include "wine/unicode.h"
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WINE_DEFAULT_DEBUG_CHANNEL(module);
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#define LOADORDER_ALLOC_CLUSTER 32 /* Allocate with 32 entries at a time */
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typedef struct module_loadorder
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{
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const WCHAR *modulename;
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enum loadorder loadorder;
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} module_loadorder_t;
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struct loadorder_list
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{
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int count;
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int alloc;
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module_loadorder_t *order;
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};
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static const WCHAR separatorsW[] = {',',' ','\t',0};
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static BOOL init_done;
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static struct loadorder_list env_list;
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/***************************************************************************
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* cmp_sort_func (internal, static)
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*
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* Sorting and comparing function used in sort and search of loadorder
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* entries.
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*/
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static int cmp_sort_func(const void *s1, const void *s2)
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{
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return wcsicmp(((const module_loadorder_t *)s1)->modulename, ((const module_loadorder_t *)s2)->modulename);
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}
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/***************************************************************************
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* get_basename
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*
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* Return the base name of a file name (i.e. remove the path components).
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*/
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static const WCHAR *get_basename( const WCHAR *name )
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{
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const WCHAR *ptr;
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if (name[0] && name[1] == ':') name += 2; /* strip drive specification */
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if ((ptr = wcsrchr( name, '\\' ))) name = ptr + 1;
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if ((ptr = wcsrchr( name, '/' ))) name = ptr + 1;
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return name;
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}
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/***************************************************************************
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* remove_dll_ext
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*
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* Remove extension if it is ".dll".
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*/
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static inline void remove_dll_ext( WCHAR *name )
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{
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static const WCHAR dllW[] = {'.','d','l','l',0};
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WCHAR *p = wcsrchr( name, '.' );
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if (p && !wcsicmp( p, dllW )) *p = 0;
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}
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/***************************************************************************
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* debugstr_loadorder
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*
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* Return a loadorder in printable form.
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*/
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static const char *debugstr_loadorder( enum loadorder lo )
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{
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switch(lo)
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{
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case LO_DISABLED: return "";
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case LO_NATIVE: return "n";
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case LO_BUILTIN: return "b";
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case LO_NATIVE_BUILTIN: return "n,b";
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case LO_BUILTIN_NATIVE: return "b,n";
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case LO_DEFAULT: return "default";
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default: return "??";
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}
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}
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/***************************************************************************
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* parse_load_order
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*
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* Parses the loadorder options from the configuration and puts it into
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* a structure.
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*/
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static enum loadorder parse_load_order( const WCHAR *order )
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{
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enum loadorder ret = LO_DISABLED;
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while (*order)
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{
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order += strspnW( order, separatorsW );
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switch(*order)
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{
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case 'N': /* native */
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case 'n':
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if (ret == LO_DISABLED) ret = LO_NATIVE;
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else if (ret == LO_BUILTIN) return LO_BUILTIN_NATIVE;
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break;
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case 'B': /* builtin */
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case 'b':
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if (ret == LO_DISABLED) ret = LO_BUILTIN;
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else if (ret == LO_NATIVE) return LO_NATIVE_BUILTIN;
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break;
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}
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order += strcspnW( order, separatorsW );
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}
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return ret;
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}
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/***************************************************************************
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* add_load_order
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*
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* Adds an entry in the list of environment overrides.
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*/
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static void add_load_order( const module_loadorder_t *plo )
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{
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int i;
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for(i = 0; i < env_list.count; i++)
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{
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if(!cmp_sort_func(plo, &env_list.order[i] ))
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{
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/* replace existing option */
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env_list.order[i].loadorder = plo->loadorder;
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return;
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}
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}
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if (i >= env_list.alloc)
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{
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/* No space in current array, make it larger */
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env_list.alloc += LOADORDER_ALLOC_CLUSTER;
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if (env_list.order)
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env_list.order = RtlReAllocateHeap(GetProcessHeap(), 0, env_list.order,
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env_list.alloc * sizeof(module_loadorder_t));
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else
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env_list.order = RtlAllocateHeap(GetProcessHeap(), 0,
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env_list.alloc * sizeof(module_loadorder_t));
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if(!env_list.order)
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{
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MESSAGE("Virtual memory exhausted\n");
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exit(1);
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}
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}
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env_list.order[i].loadorder = plo->loadorder;
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env_list.order[i].modulename = plo->modulename;
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env_list.count++;
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}
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/***************************************************************************
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* add_load_order_set
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*
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* Adds a set of entries in the list of command-line overrides from the key parameter.
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*/
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static void add_load_order_set( WCHAR *entry )
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{
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module_loadorder_t ldo;
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WCHAR *end = wcschr( entry, '=' );
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if (!end) return;
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*end++ = 0;
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ldo.loadorder = parse_load_order( end );
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while (*entry)
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{
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entry += strspnW( entry, separatorsW );
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end = entry + strcspnW( entry, separatorsW );
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if (*end) *end++ = 0;
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if (*entry)
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{
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remove_dll_ext( entry );
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ldo.modulename = entry;
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add_load_order( &ldo );
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entry = end;
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}
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}
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}
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/***************************************************************************
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* init_load_order
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*/
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static void init_load_order(void)
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{
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const char *order = getenv( "WINEDLLOVERRIDES" );
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UNICODE_STRING strW;
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WCHAR *entry, *next;
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init_done = TRUE;
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if (!order) return;
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if (!strcmp( order, "help" ))
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{
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MESSAGE( "Syntax:\n"
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" WINEDLLOVERRIDES=\"entry;entry;entry...\"\n"
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" where each entry is of the form:\n"
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" module[,module...]={native|builtin}[,{b|n}]\n"
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"\n"
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" Only the first letter of the override (native or builtin)\n"
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" is significant.\n\n"
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"Example:\n"
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" WINEDLLOVERRIDES=\"comdlg32=n,b;shell32,shlwapi=b\"\n" );
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exit(0);
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}
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RtlCreateUnicodeStringFromAsciiz( &strW, order );
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entry = strW.Buffer;
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while (*entry)
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{
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while (*entry == ';') entry++;
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if (!*entry) break;
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next = wcschr( entry, ';' );
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if (next) *next++ = 0;
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else next = entry + strlenW(entry);
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add_load_order_set( entry );
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entry = next;
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}
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/* sort the array for quick lookup */
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if (env_list.count)
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qsort(env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func);
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/* Note: we don't free the Unicode string because the
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* stored module names point inside it */
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}
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/***************************************************************************
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* get_env_load_order
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*
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* Get the load order for a given module from the WINEDLLOVERRIDES environment variable.
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*/
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static inline enum loadorder get_env_load_order( const WCHAR *module )
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{
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module_loadorder_t tmp, *res;
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tmp.modulename = module;
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/* some bsearch implementations (Solaris) are buggy when the number of items is 0 */
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if (env_list.count &&
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(res = bsearch(&tmp, env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func)))
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return res->loadorder;
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return LO_INVALID;
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}
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/***************************************************************************
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* get_standard_key
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*
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* Return a handle to the standard DllOverrides registry section.
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*/
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static HANDLE get_standard_key(void)
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{
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static const WCHAR DllOverridesW[] = {'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\',
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'D','l','l','O','v','e','r','r','i','d','e','s',0};
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static HANDLE std_key = (HANDLE)-1;
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if (std_key == (HANDLE)-1)
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{
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OBJECT_ATTRIBUTES attr;
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UNICODE_STRING nameW;
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HANDLE root;
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RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
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attr.Length = sizeof(attr);
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attr.RootDirectory = root;
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attr.ObjectName = &nameW;
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attr.Attributes = 0;
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attr.SecurityDescriptor = NULL;
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attr.SecurityQualityOfService = NULL;
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RtlInitUnicodeString( &nameW, DllOverridesW );
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/* @@ Wine registry key: HKCU\Software\Wine\DllOverrides */
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if (NtOpenKey( &std_key, KEY_ALL_ACCESS, &attr )) std_key = 0;
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NtClose( root );
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}
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return std_key;
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}
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/***************************************************************************
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* get_app_key
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*
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* Get the registry key for the app-specific DllOverrides list.
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*/
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static HANDLE get_app_key( const WCHAR *app_name )
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{
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OBJECT_ATTRIBUTES attr;
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UNICODE_STRING nameW;
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HANDLE root;
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WCHAR *str;
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static const WCHAR AppDefaultsW[] = {'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\',
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'A','p','p','D','e','f','a','u','l','t','s','\\',0};
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static const WCHAR DllOverridesW[] = {'\\','D','l','l','O','v','e','r','r','i','d','e','s',0};
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static HANDLE app_key = (HANDLE)-1;
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if (app_key != (HANDLE)-1) return app_key;
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str = RtlAllocateHeap( GetProcessHeap(), 0,
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sizeof(AppDefaultsW) + sizeof(DllOverridesW) +
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strlenW(app_name) * sizeof(WCHAR) );
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if (!str) return 0;
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wcscpy( str, AppDefaultsW );
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wcscat( str, app_name );
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wcscat( str, DllOverridesW );
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RtlOpenCurrentUser( KEY_ALL_ACCESS, &root );
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attr.Length = sizeof(attr);
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attr.RootDirectory = root;
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attr.ObjectName = &nameW;
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attr.Attributes = 0;
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attr.SecurityDescriptor = NULL;
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attr.SecurityQualityOfService = NULL;
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RtlInitUnicodeString( &nameW, str );
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/* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\DllOverrides */
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if (NtOpenKey( &app_key, KEY_ALL_ACCESS, &attr )) app_key = 0;
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NtClose( root );
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RtlFreeHeap( GetProcessHeap(), 0, str );
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return app_key;
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}
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/***************************************************************************
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* get_registry_value
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*
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* Load the registry loadorder value for a given module.
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*/
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static enum loadorder get_registry_value( HANDLE hkey, const WCHAR *module )
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{
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UNICODE_STRING valueW;
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char buffer[80];
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DWORD count;
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RtlInitUnicodeString( &valueW, module );
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if (!NtQueryValueKey( hkey, &valueW, KeyValuePartialInformation,
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buffer, sizeof(buffer), &count ))
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{
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WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
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return parse_load_order( str );
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}
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return LO_INVALID;
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}
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/***************************************************************************
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* get_load_order_value
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*
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* Get the load order for the exact specified module string, looking in:
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* 1. The WINEDLLOVERRIDES environment variable
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* 2. The per-application DllOverrides key
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* 3. The standard DllOverrides key
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*/
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static enum loadorder get_load_order_value( HANDLE std_key, HANDLE app_key, const WCHAR *module )
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{
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enum loadorder ret;
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if ((ret = get_env_load_order( module )) != LO_INVALID)
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{
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TRACE( "got environment %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
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return ret;
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}
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if (app_key && ((ret = get_registry_value( app_key, module )) != LO_INVALID))
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{
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TRACE( "got app defaults %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
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return ret;
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}
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if (std_key && ((ret = get_registry_value( std_key, module )) != LO_INVALID))
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{
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TRACE( "got standard key %s for %s\n", debugstr_loadorder(ret), debugstr_w(module) );
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return ret;
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}
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return ret;
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}
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/***************************************************************************
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* get_load_order (internal)
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*
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* Return the loadorder of a module.
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* The system directory and '.dll' extension is stripped from the path.
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*/
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enum loadorder get_load_order( const WCHAR *app_name, const UNICODE_STRING *nt_name )
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{
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static const WCHAR nt_prefixW[] = {'\\','?','?','\\',0};
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enum loadorder ret = LO_INVALID;
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HANDLE std_key, app_key = 0;
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const WCHAR *path = nt_name->Buffer;
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WCHAR *module, *basename;
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int len;
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if (!init_done) init_load_order();
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std_key = get_standard_key();
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if (app_name) app_key = get_app_key( app_name );
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if (!strncmpW( path, nt_prefixW, 4 )) path += 4;
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TRACE("looking for %s\n", debugstr_w(path));
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/* Strip path information if the module resides in the system directory
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*/
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if (!wcsnicmp( system_dir, path, strlenW( system_dir )))
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{
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const WCHAR *p = path + strlenW( system_dir );
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while (*p == '\\' || *p == '/') p++;
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if (!wcschr( p, '\\' ) && !wcschr( p, '/' )) path = p;
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}
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if (!(len = strlenW(path))) return ret;
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if (!(module = RtlAllocateHeap( GetProcessHeap(), 0, (len + 2) * sizeof(WCHAR) ))) return ret;
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wcscpy( module+1, path ); /* reserve module[0] for the wildcard char */
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remove_dll_ext( module + 1 );
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basename = (WCHAR *)get_basename( module+1 );
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/* first explicit module name */
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if ((ret = get_load_order_value( std_key, app_key, module+1 )) != LO_INVALID)
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goto done;
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/* then module basename preceded by '*' */
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basename[-1] = '*';
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if ((ret = get_load_order_value( std_key, app_key, basename-1 )) != LO_INVALID)
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goto done;
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/* then module basename without '*' (only if explicit path) */
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if (basename != module+1 && ((ret = get_load_order_value( std_key, app_key, basename )) != LO_INVALID))
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goto done;
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/* if loading the main exe with an explicit path, try native first */
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if (!app_name && basename != module+1)
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{
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ret = LO_NATIVE_BUILTIN;
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TRACE( "got main exe default %s for %s\n", debugstr_loadorder(ret), debugstr_w(path) );
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goto done;
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}
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/* and last the hard-coded default */
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ret = LO_DEFAULT;
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TRACE( "got hardcoded %s for %s\n", debugstr_loadorder(ret), debugstr_w(path) );
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done:
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RtlFreeHeap( GetProcessHeap(), 0, module );
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return ret;
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}
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