*/
/*
- * Copyright (C) 2013 Eric Biggers
+ * Copyright (C) 2013, 2014 Eric Biggers
*
* This file is part of wimlib, a library for working with WIM files.
*
#include <errno.h>
-#ifdef WITH_NTDLL
-# include <winternl.h>
-#endif
+#include <winternl.h>
#include "wimlib/win32_common.h"
#include "wimlib/assert.h"
set_errno_from_win32_error(GetLastError());
}
-#ifdef WITH_NTDLL
void
set_errno_from_nt_status(NTSTATUS status)
{
set_errno_from_win32_error((*func_RtlNtStatusToDosError)(status));
}
-#endif
/* Given a Windows-style path, return the number of characters of the prefix
* that specify the path to the root directory of a drive, or return 0 if the
HANDLE
win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
{
- return CreateFileW(path,
- dwDesiredAccess,
- FILE_SHARE_READ,
- NULL, /* lpSecurityAttributes */
- OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS |
- FILE_FLAG_OPEN_REPARSE_POINT,
- NULL /* hTemplateFile */);
+ return CreateFile(path,
+ dwDesiredAccess,
+ FILE_SHARE_READ,
+ NULL, /* lpSecurityAttributes */
+ OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS |
+ FILE_FLAG_OPEN_REPARSE_POINT,
+ NULL /* hTemplateFile */);
}
-/* Pointers to functions that are not available on all targetted versions of
- * Windows (XP and later). NOTE: The WINAPI annotations seem to be important; I
- * assume it specifies a certain calling convention. */
-
-/* Vista and later */
-HANDLE (WINAPI *win32func_FindFirstStreamW)(LPCWSTR lpFileName,
- STREAM_INFO_LEVELS InfoLevel,
- LPVOID lpFindStreamData,
- DWORD dwFlags) = NULL;
-
-/* Vista and later */
-BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
- LPVOID lpFindStreamData) = NULL;
-
-/* Vista and later */
-BOOL (WINAPI *win32func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
- const wchar_t *lpTargetFileName,
- DWORD dwFlags) = NULL;
-
-#ifdef WITH_NTDLL
-
-DWORD (WINAPI *func_RtlNtStatusToDosError)(NTSTATUS status);
+/* Pointers to dynamically loaded functions */
+
+/* kernel32.dll: Vista and later */
+BOOL (WINAPI *func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
+ const wchar_t *lpTargetFileName,
+ DWORD dwFlags);
+
+/* ntdll.dll */
+
+NTSTATUS (WINAPI *func_NtOpenFile) (PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ POBJECT_ATTRIBUTES ObjectAttributes,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ ULONG ShareAccess,
+ ULONG OpenOptions);
+
+NTSTATUS (WINAPI *func_NtReadFile) (HANDLE FileHandle,
+ HANDLE Event,
+ PIO_APC_ROUTINE ApcRoutine,
+ PVOID ApcContext,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ PVOID Buffer,
+ ULONG Length,
+ PLARGE_INTEGER ByteOffset,
+ PULONG Key);
+
+NTSTATUS (WINAPI *func_NtOpenFile) (PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ POBJECT_ATTRIBUTES ObjectAttributes,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ ULONG ShareAccess,
+ ULONG OpenOptions);
NTSTATUS (WINAPI *func_NtQueryInformationFile)(HANDLE FileHandle,
PIO_STATUS_BLOCK IoStatusBlock,
PUNICODE_STRING FileName,
BOOLEAN RestartScan);
+NTSTATUS (WINAPI *func_NtQueryVolumeInformationFile) (HANDLE FileHandle,
+ PIO_STATUS_BLOCK IoStatusBlock,
+ PVOID FsInformation,
+ ULONG Length,
+ FS_INFORMATION_CLASS FsInformationClass);
+
NTSTATUS (WINAPI *func_NtSetSecurityObject)(HANDLE Handle,
SECURITY_INFORMATION SecurityInformation,
PSECURITY_DESCRIPTOR SecurityDescriptor);
-#endif /* WITH_NTDLL */
+NTSTATUS (WINAPI *func_NtClose) (HANDLE Handle);
+
+DWORD (WINAPI *func_RtlNtStatusToDosError)(NTSTATUS status);
+
+NTSTATUS (WINAPI *func_RtlCreateSystemVolumeInformationFolder)
+ (PCUNICODE_STRING VolumeRootPath);
static OSVERSIONINFO windows_version_info = {
.dwOSVersionInfoSize = sizeof(OSVERSIONINFO),
};
-static HMODULE hKernel32 = NULL;
-
-#ifdef WITH_NTDLL
-static HMODULE hNtdll = NULL;
-#endif
-
static bool acquired_privileges = false;
bool
windows_version_info.dwMinorVersion >= minor);
}
+struct dll_sym {
+ void **func_ptr;
+ const char *name;
+ bool required;
+};
+
+#define DLL_SYM(name, required) { (void **)&func_##name, #name, required }
+
+#define for_each_sym(sym, spec) \
+ for ((sym) = (spec)->syms; (sym)->name; (sym)++)
+
+struct dll_spec {
+ const wchar_t *name;
+ HMODULE handle;
+ const struct dll_sym syms[];
+};
+
+struct dll_spec ntdll_spec = {
+ .name = L"ntdll.dll",
+ .syms = {
+ DLL_SYM(NtOpenFile, true),
+ DLL_SYM(NtReadFile, true),
+ DLL_SYM(NtQueryInformationFile, true),
+ DLL_SYM(NtQuerySecurityObject, true),
+ DLL_SYM(NtQueryDirectoryFile, true),
+ DLL_SYM(NtQueryVolumeInformationFile, true),
+ DLL_SYM(NtSetSecurityObject, true),
+ DLL_SYM(NtClose, true),
+ DLL_SYM(RtlNtStatusToDosError, true),
+ DLL_SYM(RtlCreateSystemVolumeInformationFolder, false),
+ {NULL, NULL},
+ },
+};
+
+struct dll_spec kernel32_spec = {
+ .name = L"kernel32.dll",
+ .syms = {
+ DLL_SYM(CreateSymbolicLinkW, false),
+ {NULL, NULL},
+ },
+};
+
+static int
+init_dll(struct dll_spec *spec)
+{
+ const struct dll_sym *sym;
+ void *addr;
+
+ if (!spec->handle)
+ spec->handle = LoadLibrary(spec->name);
+ if (!spec->handle) {
+ for_each_sym(sym, spec) {
+ if (sym->required) {
+ ERROR("%ls could not be loaded!", spec->name);
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+ }
+ return 0;
+ }
+ for_each_sym(sym, spec) {
+ addr = (void *)GetProcAddress(spec->handle, sym->name);
+ if (addr) {
+ *(sym->func_ptr) = addr;
+ } else if (sym->required) {
+ ERROR("Can't find %s in %ls", sym->name, spec->name);
+ return WIMLIB_ERR_UNSUPPORTED;
+ }
+ }
+ return 0;
+}
+
+static void
+cleanup_dll(struct dll_spec *spec)
+{
+ const struct dll_sym *sym;
+
+ if (spec->handle) {
+ FreeLibrary(spec->handle);
+ spec->handle = NULL;
+
+ for_each_sym(sym, spec)
+ *(sym->func_ptr) = NULL;
+ }
+}
+
/* One-time initialization for Windows capture/apply code. */
int
win32_global_init(int init_flags)
{
+ int ret;
+
/* Try to acquire useful privileges. */
if (!(init_flags & WIMLIB_INIT_FLAG_DONT_ACQUIRE_PRIVILEGES)) {
+ ret = WIMLIB_ERR_INSUFFICIENT_PRIVILEGES;
if (!win32_modify_capture_privileges(true))
if (init_flags & WIMLIB_INIT_FLAG_STRICT_CAPTURE_PRIVILEGES)
- goto insufficient_privileges;
+ goto out_drop_privs;
if (!win32_modify_apply_privileges(true))
if (init_flags & WIMLIB_INIT_FLAG_STRICT_APPLY_PRIVILEGES)
- goto insufficient_privileges;
+ goto out_drop_privs;
acquired_privileges = true;
}
GetVersionEx(&windows_version_info);
/* Try to dynamically load some functions. */
- if (hKernel32 == NULL)
- hKernel32 = LoadLibrary(L"Kernel32.dll");
-
- if (hKernel32) {
- win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32,
- "FindFirstStreamW");
- if (win32func_FindFirstStreamW) {
- win32func_FindNextStreamW = (void*)GetProcAddress(hKernel32,
- "FindNextStreamW");
- if (!win32func_FindNextStreamW)
- win32func_FindFirstStreamW = NULL;
- }
- win32func_CreateSymbolicLinkW = (void*)GetProcAddress(hKernel32,
- "CreateSymbolicLinkW");
- }
+ ret = init_dll(&kernel32_spec);
+ if (ret)
+ goto out_drop_privs;
-#ifdef WITH_NTDLL
- if (hNtdll == NULL)
- hNtdll = LoadLibrary(L"ntdll.dll");
-
- if (hNtdll) {
- func_RtlNtStatusToDosError =
- (void*)GetProcAddress(hNtdll, "RtlNtStatusToDosError");
- if (func_RtlNtStatusToDosError) {
-
- func_NtQuerySecurityObject =
- (void*)GetProcAddress(hNtdll, "NtQuerySecurityObject");
-
- func_NtQueryDirectoryFile =
- (void*)GetProcAddress(hNtdll, "NtQueryDirectoryFile");
-
- func_NtQueryInformationFile =
- (void*)GetProcAddress(hNtdll, "NtQueryInformationFile");
-
- func_NtSetSecurityObject =
- (void*)GetProcAddress(hNtdll, "NtSetSecurityObject");
- }
- }
-
- DEBUG("FindFirstStreamW @ %p", win32func_FindFirstStreamW);
- DEBUG("FindNextStreamW @ %p", win32func_FindNextStreamW);
- DEBUG("CreateSymbolicLinkW @ %p", win32func_CreateSymbolicLinkW);
- DEBUG("RtlNtStatusToDosError @ %p", func_RtlNtStatusToDosError);
- DEBUG("NtQuerySecurityObject @ %p", func_NtQuerySecurityObject);
- DEBUG("NtQueryDirectoryFile @ %p", func_NtQueryDirectoryFile);
- DEBUG("NtQueryInformationFile @ %p", func_NtQueryInformationFile);
- DEBUG("NtSetSecurityObject @ %p", func_NtSetSecurityObject);
-#endif
+ ret = init_dll(&ntdll_spec);
+ if (ret)
+ goto out_cleanup_kernel32;
return 0;
-insufficient_privileges:
+out_cleanup_kernel32:
+ cleanup_dll(&kernel32_spec);
+out_drop_privs:
win32_release_capture_and_apply_privileges();
- return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES;
+ return ret;
}
void
{
if (acquired_privileges)
win32_release_capture_and_apply_privileges();
- if (hKernel32 != NULL) {
- FreeLibrary(hKernel32);
- hKernel32 = NULL;
- }
-#ifdef WITH_NTDLL
- if (hNtdll != NULL) {
- FreeLibrary(hNtdll);
- hNtdll = NULL;
- }
-#endif
+
+ cleanup_dll(&kernel32_spec);
+ cleanup_dll(&ntdll_spec);
}
#endif /* __WIN32__ */
git://wimlib.net / wimlib / blobdiff