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Added LOAD_WITH_ALTERED_SEARCH_PATH support to LoadLibraryEx.

This commit is contained in:
Bill Medland 2001-08-24 21:13:02 +00:00 committed by Alexandre Julliard
parent 9d9dac0947
commit 65fc1c92d4
5 changed files with 199 additions and 23 deletions
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106
files/directory.c
View File

@ -582,8 +582,7 @@ DWORD DIR_SearchPath( LPCSTR path, LPCSTR name, LPCSTR ext,
p = strrchr( name, '.' );
if (p && !strchr( p, '/' ) && !strchr( p, '\\' ))
ext = NULL; /* Ignore the specified extension */
if ((*name && (name[1] == ':')) ||
strchr( name, '/' ) || strchr( name, '\\' ))
if (FILE_contains_path (name))
path = NULL; /* Ignore path if name already contains a path */
if (path && !*path) path = NULL; /* Ignore empty path */
@ -604,7 +603,7 @@ DWORD DIR_SearchPath( LPCSTR path, LPCSTR name, LPCSTR ext,
/* If the name contains an explicit path, everything's easy */
if ((*name && (name[1] == ':')) || strchr( name, '/' ) || strchr( name, '\\' ))
if (FILE_contains_path(name))
{
ret = DOSFS_GetFullName( name, TRUE, full_name );
goto done;
@ -746,3 +745,104 @@ DWORD WINAPI SearchPathW( LPCWSTR path, LPCWSTR name, LPCWSTR ext,
}
/***********************************************************************
* search_alternate_path
*
*
* FIXME: should return long path names.?
*/
static BOOL search_alternate_path(LPCSTR dll_path, LPCSTR name, LPCSTR ext,
DOS_FULL_NAME *full_name)
{
LPCSTR p;
LPSTR tmp = NULL;
BOOL ret = TRUE;
/* First check the supplied parameters */
p = strrchr( name, '.' );
if (p && !strchr( p, '/' ) && !strchr( p, '\\' ))
ext = NULL; /* Ignore the specified extension */
/* Allocate a buffer for the file name and extension */
if (ext)
{
DWORD len = strlen(name) + strlen(ext);
if (!(tmp = HeapAlloc( GetProcessHeap(), 0, len + 1 )))
{
SetLastError( ERROR_OUTOFMEMORY );
return 0;
}
strcpy( tmp, name );
strcat( tmp, ext );
name = tmp;
}
if (DIR_TryEnvironmentPath (name, full_name, dll_path))
;
else if (DOSFS_GetFullName (name, TRUE, full_name)) /* current dir */
;
else if (DIR_TryPath (&DIR_System, name, full_name)) /* System dir */
;
else if (DIR_TryPath (&DIR_Windows, name, full_name)) /* Windows dir */
;
else
ret = DIR_TryEnvironmentPath( name, full_name, NULL );
if (tmp) HeapFree( GetProcessHeap(), 0, tmp );
return ret;
}
/***********************************************************************
* DIR_SearchAlternatePath
*
* Searches for a specified file in the search path.
*
* PARAMS
* dll_path [I] Path to search
* name [I] Filename to search for.
* ext [I] File extension to append to file name. The first
* character must be a period. This parameter is
* specified only if the filename given does not
* contain an extension.
* buflen [I] size of buffer, in characters
* buffer [O] buffer for found filename
* lastpart [O] address of pointer to last used character in
* buffer (the final '\') (May be NULL)
*
* RETURNS
* Success: length of string copied into buffer, not including
* terminating null character. If the filename found is
* longer than the length of the buffer, the length of the
* filename is returned.
* Failure: Zero
*
* NOTES
* If the file is not found, calls SetLastError(ERROR_FILE_NOT_FOUND)
*/
DWORD DIR_SearchAlternatePath( LPCSTR dll_path, LPCSTR name, LPCSTR ext,
DWORD buflen, LPSTR buffer, LPSTR *lastpart )
{
LPSTR p, res;
DOS_FULL_NAME full_name;
if (!search_alternate_path( dll_path, name, ext, &full_name))
{
SetLastError(ERROR_FILE_NOT_FOUND);
return 0;
}
lstrcpynA( buffer, full_name.short_name, buflen );
res = full_name.long_name +
strlen(DRIVE_GetRoot( full_name.short_name[0] - 'A' ));
while (*res == '/') res++;
if (buflen)
{
if (buflen > 3) lstrcpynA( buffer + 3, res, buflen - 3 );
for (p = buffer; *p; p++) if (*p == '/') *p = '\\';
if (lastpart) *lastpart = strrchr( buffer, '\\' ) + 1;
}
TRACE("Returning %d\n", strlen(res) + 3 );
return strlen(res) + 3;
}

8
include/file.h
View File

@ -61,6 +61,12 @@ inline static char FILE_toupper( char c )
return c;
}
inline static int FILE_contains_path (LPCSTR name)
{
return ((*name && (name[1] == ':')) ||
strchr (name, '/') || strchr (name, '\\'));
}
/* files/file.c */
extern int FILE_strcasecmp( const char *str1, const char *str2 );
extern int FILE_strncasecmp( const char *str1, const char *str2, int len );
@ -80,6 +86,8 @@ extern LONG WINAPI WIN16_hread(HFILE16,SEGPTR,LONG);
extern int DIR_Init(void);
extern UINT DIR_GetWindowsUnixDir( LPSTR path, UINT count );
extern UINT DIR_GetSystemUnixDir( LPSTR path, UINT count );
extern DWORD DIR_SearchAlternatePath( LPCSTR dll_path, LPCSTR name, LPCSTR ext,
DWORD buflen, LPSTR buffer, LPSTR *lastpart);
extern DWORD DIR_SearchPath( LPCSTR path, LPCSTR name, LPCSTR ext,
DOS_FULL_NAME *full_name, BOOL win32 );

1
include/module.h
View File

@ -234,6 +234,7 @@ extern WINE_MODREF *PE_CreateModule( HMODULE hModule, LPCSTR filename,
DWORD flags, HANDLE hFile, BOOL builtin );
extern void PE_InitTls(void);
extern BOOL PE_InitDLL( HMODULE module, DWORD type, LPVOID lpReserved );
extern DWORD PE_fixup_imports(WINE_MODREF *wm);
/* loader/loadorder.c */
extern void MODULE_InitLoadOrder(void);

93
loader/module.c
View File

@ -1315,6 +1315,37 @@ HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
return wm ? wm->module : 0;
}
/***********************************************************************
* allocate_lib_dir
*
* helper for MODULE_LoadLibraryExA. Allocate space to hold the directory
* portion of the provided name and put the name in it.
*
*/
static LPCSTR allocate_lib_dir(LPCSTR libname)
{
LPCSTR p, pmax;
LPSTR result;
int length;
pmax = libname;
if ((p = strrchr( pmax, '\\' ))) pmax = p + 1;
if ((p = strrchr( pmax, '/' ))) pmax = p + 1; /* Naughty. MSDN says don't */
if (pmax == libname && pmax[0] && pmax[1] == ':') pmax += 2;
length = pmax - libname;
result = HeapAlloc (GetProcessHeap(), 0, length+1);
if (result)
{
strncpy (result, libname, length);
result [length] = '\0';
}
return result;
}
/***********************************************************************
* MODULE_LoadLibraryExA (internal)
*
@ -1325,6 +1356,16 @@ HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
* ignore the parameter because it would be extremely difficult to
* integrate this with different types of module represenations.
*
* libdir is used to support LOAD_WITH_ALTERED_SEARCH_PATH during the recursion
* on this function. When first called from LoadLibraryExA it will be
* NULL but thereafter it may point to a buffer containing the path
* portion of the library name. Note that the recursion all occurs
* within a Critical section (see LoadLibraryExA) so the use of a
* static is acceptable.
* (We have to use a static variable at some point anyway, to pass the
* information from BUILTIN32_dlopen through dlopen and the builtin's
* init function into load_library).
* allocated_libdir is TRUE in the stack frame that allocated libdir
*/
WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
{
@ -1334,14 +1375,30 @@ WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
enum loadorder_type loadorder[LOADORDER_NTYPES];
LPSTR filename, p;
const char *filetype = "";
DWORD found;
BOOL allocated_libdir = FALSE;
static LPCSTR libdir = NULL; /* See above */
if ( !libname ) return NULL;
filename = HeapAlloc ( GetProcessHeap(), 0, MAX_PATH + 1 );
if ( !filename ) return NULL;
RtlAcquirePebLock();
if ((flags & LOAD_WITH_ALTERED_SEARCH_PATH) && FILE_contains_path(libname))
{
if (!(libdir = allocate_lib_dir(libname))) goto error;
allocated_libdir = TRUE;
}
if (!libdir || allocated_libdir)
found = SearchPathA(NULL, libname, ".dll", MAX_PATH, filename, NULL);
else
found = DIR_SearchAlternatePath(libdir, libname, ".dll", MAX_PATH, filename, NULL);
/* build the modules filename */
if (!SearchPathA( NULL, libname, ".dll", MAX_PATH, filename, NULL ))
if (!found)
{
if ( ! GetSystemDirectoryA ( filename, MAX_PATH ) )
goto error;
@ -1357,26 +1414,18 @@ WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
strcpy ( filename, libname );
else
{
if ( strchr ( libname, '\\' ) || strchr ( libname, ':') || strchr ( libname, '/' ) )
goto error;
else
{
if (FILE_contains_path(libname)) goto error;
strcat ( filename, "\\" );
strcat ( filename, libname );
}
}
/* if the filename doesn't have an extension append .DLL */
if (!(p = strrchr( filename, '.')) || strchr( p, '/' ) || strchr( p, '\\'))
strcat( filename, ".DLL" );
strcat( filename, ".dll" );
}
RtlAcquirePebLock();
/* Check for already loaded module */
if (!(pwm = MODULE_FindModule(filename)) &&
/* no path in libpath */
!strchr( libname, '\\' ) && !strchr( libname, ':') && !strchr( libname, '/' ))
if (!(pwm = MODULE_FindModule(filename)) && !FILE_contains_path(libname))
{
LPSTR fn = HeapAlloc ( GetProcessHeap(), 0, MAX_PATH + 1 );
if (fn)
@ -1404,11 +1453,15 @@ WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
if ((pwm->flags & WINE_MODREF_DONT_RESOLVE_REFS) &&
!(flags & DONT_RESOLVE_DLL_REFERENCES))
{
extern DWORD fixup_imports(WINE_MODREF *wm); /*FIXME*/
pwm->flags &= ~WINE_MODREF_DONT_RESOLVE_REFS;
fixup_imports( pwm );
PE_fixup_imports( pwm );
}
TRACE("Already loaded module '%s' at 0x%08x, count=%d, \n", filename, pwm->module, pwm->refCount);
if (allocated_libdir)
{
HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
libdir = NULL;
}
RtlReleasePebLock();
HeapFree ( GetProcessHeap(), 0, filename );
return pwm;
@ -1456,6 +1509,11 @@ WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
/* decrement the dependencies through the MODULE_FreeLibrary call. */
pwm->refCount++;
if (allocated_libdir)
{
HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
libdir = NULL;
}
RtlReleasePebLock();
SetLastError( err ); /* restore last error */
HeapFree ( GetProcessHeap(), 0, filename );
@ -1466,8 +1524,13 @@ WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
break;
}
RtlReleasePebLock();
error:
if (allocated_libdir)
{
HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
libdir = NULL;
}
RtlReleasePebLock();
WARN("Failed to load module '%s'; error=0x%08lx, \n", filename, GetLastError());
HeapFree ( GetProcessHeap(), 0, filename );
return NULL;

10
loader/pe_image.c
View File

@ -17,7 +17,7 @@
* - If you want to enhance, speed up or clean up something in here, think
* twice WHY it is implemented in that strange way. There is usually a reason.
* Though sometimes it might just be lazyness ;)
* - In PE_MapImage, right before fixup_imports() all external and internal
* - In PE_MapImage, right before PE_fixup_imports() all external and internal
* state MUST be correct since this function can be called with the SAME image
* AGAIN. (Thats recursion for you.) That means MODREF.module and
* NE_MODULE.module32.
@ -242,7 +242,10 @@ static FARPROC PE_FindExportedFunction(
}
}
DWORD fixup_imports( WINE_MODREF *wm )
/****************************************************************
* PE_fixup_imports
*/
DWORD PE_fixup_imports( WINE_MODREF *wm )
{
IMAGE_IMPORT_DESCRIPTOR *pe_imp;
unsigned int load_addr = wm->module;
@ -633,7 +636,8 @@ WINE_MODREF *PE_CreateModule( HMODULE hModule, LPCSTR filename, DWORD flags,
/* Fixup Imports */
if (!(wm->flags & WINE_MODREF_DONT_RESOLVE_REFS) && fixup_imports( wm ))
if (!(wm->flags & WINE_MODREF_DONT_RESOLVE_REFS) &&
PE_fixup_imports( wm ))
{
/* remove entry from modref chain */