Created
March 27, 2026 01:46
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detect_compile_sdk.py
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| import ctypes | |
| MH_MAGIC = 0xfeedface | |
| MH_MAGIC_64 = 0xfeedfacf | |
| LC_BUILD_VERSION = 0x32 | |
| class MachHeader32(ctypes.Structure): | |
| _fields_ = [ | |
| ("magic", ctypes.c_uint32), | |
| ("cputype", ctypes.c_uint32), | |
| ("cpusubtype", ctypes.c_uint32), | |
| ("filetype", ctypes.c_uint32), | |
| ("ncmds", ctypes.c_uint32), | |
| ("sizeofcmds", ctypes.c_uint32), | |
| ("flags", ctypes.c_uint32), | |
| ] | |
| class MachHeader64(ctypes.Structure): | |
| _fields_ = [ | |
| ("magic", ctypes.c_uint32), | |
| ("cputype", ctypes.c_uint32), | |
| ("cpusubtype", ctypes.c_uint32), | |
| ("filetype", ctypes.c_uint32), | |
| ("ncmds", ctypes.c_uint32), | |
| ("sizeofcmds", ctypes.c_uint32), | |
| ("flags", ctypes.c_uint32), | |
| ("reserved", ctypes.c_uint32), | |
| ] | |
| class LoadCommand(ctypes.Structure): | |
| _fields_ = [ | |
| ("cmd", ctypes.c_uint32), | |
| ("cmdsize", ctypes.c_uint32), | |
| ] | |
| class BuildVersionCommand(ctypes.Structure): | |
| _fields_ = [ | |
| ("cmd", ctypes.c_uint32), | |
| ("cmdsize", ctypes.c_uint32), | |
| ("platform", ctypes.c_uint32), | |
| ("minos", ctypes.c_uint32), | |
| ("sdk", ctypes.c_uint32), | |
| ("ntools", ctypes.c_uint32), | |
| ] | |
| libc = ctypes.CDLL(None) | |
| _dyld_get_image_header = libc._dyld_get_image_header | |
| _dyld_get_image_header.restype = ctypes.c_void_p | |
| _dyld_get_image_header.argtypes = [ctypes.c_uint32] | |
| def decode_version(v): | |
| return f"{v >> 16}.{(v >> 8) & 0xff}.{v & 0xff}" | |
| def get_sdk_version(): | |
| mh_ptr = _dyld_get_image_header(0) | |
| magic = ctypes.c_uint32.from_address(mh_ptr).value | |
| if magic == MH_MAGIC_64: | |
| header = MachHeader64.from_address(mh_ptr) | |
| cmd_ptr = mh_ptr + ctypes.sizeof(MachHeader64) | |
| elif magic == MH_MAGIC: | |
| header = MachHeader32.from_address(mh_ptr) | |
| cmd_ptr = mh_ptr + ctypes.sizeof(MachHeader32) | |
| else: | |
| return None | |
| for _ in range(header.ncmds): | |
| lc = LoadCommand.from_address(cmd_ptr) | |
| if lc.cmd == LC_BUILD_VERSION: | |
| cmd = BuildVersionCommand.from_address(cmd_ptr) | |
| return decode_version(cmd.sdk) | |
| cmd_ptr += lc.cmdsize | |
| return None | |
| __all__ = ["get_sdk_version"] |
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