/* Pointers to dynamically loaded functions */
/* kernel32.dll: Vista and later */
-BOOL (WINAPI *win32func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
- const wchar_t *lpTargetFileName,
- DWORD dwFlags);
+BOOL (WINAPI *func_CreateSymbolicLinkW)(const wchar_t *lpSymlinkFileName,
+ const wchar_t *lpTargetFileName,
+ DWORD dwFlags);
/* ntdll.dll */
-DWORD (WINAPI *func_RtlNtStatusToDosError)(NTSTATUS status);
+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);
+NTSTATUS (WINAPI *func_NtClose) (HANDLE Handle);
+
+DWORD (WINAPI *func_RtlNtStatusToDosError)(NTSTATUS status);
+
NTSTATUS (WINAPI *func_RtlCreateSystemVolumeInformationFolder)
(PCUNICODE_STRING VolumeRootPath);
.dwOSVersionInfoSize = sizeof(OSVERSIONINFO),
};
-static HMODULE hKernel32 = NULL;
-
-static HMODULE hNtdll = NULL;
-
static bool acquired_privileges = false;
bool
windows_version_info.dwMinorVersion >= minor);
}
-#define NTDLL_SYM(name) { (void **)&func_##name, #name }
-static const struct ntdll_sym {
+struct dll_sym {
void **func_ptr;
const char *name;
-} ntdll_syms[] = {
- NTDLL_SYM(RtlNtStatusToDosError),
- NTDLL_SYM(NtQueryInformationFile),
- NTDLL_SYM(NtQuerySecurityObject),
- NTDLL_SYM(NtQueryDirectoryFile),
- NTDLL_SYM(NtSetSecurityObject),
- {NULL, NULL},
+ 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},
+ },
};
-#undef NTDLL_SYM
+
+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_CreateSymbolicLinkW =
- (void *)GetProcAddress(hKernel32, "CreateSymbolicLinkW");
- }
+ ret = init_dll(&kernel32_spec);
+ if (ret)
+ goto out_drop_privs;
- if (hNtdll == NULL)
- hNtdll = LoadLibrary(L"ntdll.dll");
+ ret = init_dll(&ntdll_spec);
+ if (ret)
+ goto out_cleanup_kernel32;
- if (!hNtdll) {
- ERROR("ntdll.dll could not be loaded!");
- return WIMLIB_ERR_UNSUPPORTED;
- }
-
- for (const struct ntdll_sym *sym = ntdll_syms; sym->name; sym++) {
- void *addr = (void *)GetProcAddress(hNtdll, sym->name);
- if (!addr) {
- ERROR("Can't find %s() in ntdll.dll", sym->name);
- return WIMLIB_ERR_UNSUPPORTED;
- }
- *(sym->func_ptr) = addr;
- }
-
- func_RtlCreateSystemVolumeInformationFolder =
- (void *)GetProcAddress(hNtdll, "RtlCreateSystemVolumeInformationFolder");
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);
- win32func_CreateSymbolicLinkW = NULL;
- hKernel32 = NULL;
- }
- if (hNtdll != NULL) {
- FreeLibrary(hNtdll);
- for (const struct ntdll_sym *sym = ntdll_syms; sym->name; sym++)
- *(sym->func_ptr) = NULL;
- func_RtlCreateSystemVolumeInformationFolder = NULL;
- hNtdll = NULL;
- }
+
+ cleanup_dll(&kernel32_spec);
+ cleanup_dll(&ntdll_spec);
}
#endif /* __WIN32__ */
git://wimlib.net / wimlib / blobdiff