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Try to load config.txt from the current dir

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To allow multiple configurations for HackBGRT, or to allow a custom
installation path, try to load config.txt from the same directory as
the executable.
This commit is contained in:
Lauri Kenttä
2025-04-05 16:29:29 +03:00
parent 611ab30db3
commit 96599b1838
3 changed files with 56 additions and 4 deletions
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2
README.md
View File

@@ -71,6 +71,8 @@ If you need it for other systems as well:
To install purely on Linux, you can install with `setup.exe dry-run` and then manually copy files from `dry-run/EFI` to your `[EFI System Partition]/EFI`. For further instructions, consult the documentation of your own Linux system.
HackBGRT tries to read its configuration from the same directory where it's installed, so you can even make (manually) multiple installations in different directories.
## Configuration
The configuration options are described in `config.txt`, which the installer copies into `[EFI System Partition]\EFI\HackBGRT\config.txt`.

27
src/efi.c
View File

@@ -64,6 +64,33 @@ EFI_DEVICE_PATH *FileDevicePath(IN EFI_HANDLE Device OPTIONAL, IN CHAR16 *FileNa
return new_path;
}
CHAR16 *DevicePathToStr(EFI_DEVICE_PATH *DevPath) {
UINTN path_length = 0;
for (EFI_DEVICE_PATH *p0 = DevPath;; p0 = NextDevicePathNode(p0)) {
if (DevicePathType(p0) != MEDIA_DEVICE_PATH || DevicePathSubType(p0) != MEDIA_FILEPATH_DP) {
break;
}
path_length += DevicePathNodeLength(p0) + 1;
}
CHAR16* str;
UINTN size_str = (path_length + 1) * sizeof(*str);
if (!path_length || EFI_ERROR(BS->AllocatePool(EfiBootServicesData, size_str, (void**)&str))) {
return 0;
}
UINTN pos = 0;
for (EFI_DEVICE_PATH *p0 = DevPath; pos < path_length; p0 = NextDevicePathNode(p0)) {
FILEPATH_DEVICE_PATH *f = (FILEPATH_DEVICE_PATH *) p0;
BS->CopyMem(str + pos, f->PathName, StrLen(f->PathName) * sizeof(*str));
pos += DevicePathNodeLength(p0) + 1;
str[pos - 1] = L'\\';
}
str[pos - 1] = 0;
return str;
}
INTN CompareMem(IN CONST VOID *Dest, IN CONST VOID *Src, IN UINTN len) {
CONST UINT8 *d = Dest, *s = Src;
for (UINTN i = 0; i < len; ++i) {

31
src/main.c
View File

@@ -439,16 +439,39 @@ EFI_STATUS EFIAPI efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *ST_) {
goto fail;
}
EFI_FILE_HANDLE base_dir;
if (EFI_ERROR(root_dir->Open(root_dir, &base_dir, L"\\EFI\\HackBGRT", EFI_FILE_MODE_READ, 0))) {
Log(config.debug, L"Failed to HackBGRT directory.\n");
base_dir = root_dir;
CHAR16* default_dir_path = L"\\EFI\\HackBGRT";
Log(config.debug, L"Default directory: %s\n", default_dir_path);
EFI_FILE_HANDLE default_dir;
if (EFI_ERROR(root_dir->Open(root_dir, &default_dir, default_dir_path, EFI_FILE_MODE_READ, 0))) {
Log(config.debug, L"Failed to open HackBGRT default directory.\n");
default_dir = root_dir;
}
CHAR16* working_dir_path = DevicePathToStr(image->FilePath);
for (int i = StrLen(working_dir_path), skipped_last_component = 0; i--;) {
if (working_dir_path[i] == L'/' || working_dir_path[i] == L'\\') {
working_dir_path[i] = skipped_last_component++ ? L'\\' : L'\0';
}
}
Log(config.debug, L"Working directory: %s\n", working_dir_path);
EFI_FILE_HANDLE working_dir;
if (EFI_ERROR(root_dir->Open(root_dir, &working_dir, working_dir_path, EFI_FILE_MODE_READ, 0))) {
Log(config.debug, L"Failed to open HackBGRT working directory.\n");
working_dir = default_dir;
}
EFI_FILE_HANDLE base_dir = working_dir;
EFI_SHELL_PARAMETERS_PROTOCOL *shell_param_proto = NULL;
if (EFI_ERROR(BS->OpenProtocol(image_handle, TmpGuidPtr((EFI_GUID) EFI_SHELL_PARAMETERS_PROTOCOL_GUID), (void**) &shell_param_proto, 0, 0, EFI_OPEN_PROTOCOL_GET_PROTOCOL)) || shell_param_proto->Argc <= 1) {
const CHAR16* config_path = L"config.txt";
retry_read_config:
if (!ReadConfigFile(&config, base_dir, config_path)) {
if (base_dir != default_dir && StrCmp(default_dir_path, working_dir_path) != 0) {
base_dir = default_dir;
Log(config.debug, L"Trying the default directory.\n");
goto retry_read_config;
}
Log(1, L"No config, no command line!\n", config_path);
goto fail;
}