1 // Copyright 2017 Google Inc. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include <Python.h> 16 #include <android-base/file.h> 17 #include <osdefs.h> 18 #include <stdio.h> 19 #include <stdlib.h> 20 #include <string> 21 22 int main(int argc, char *argv[]) { 23 // PYTHONEXECUTABLE is only used on MacOs X, when the Python interpreter 24 // embedded in an application bundle. It is not sure that we have this use case 25 // for Android hermetic Python. So remove this environment variable to make 26 // our self-contained environment more strict. 27 // For user (.py) program, it can access hermetic .par file path through 28 // sys.argv[0]. 29 unsetenv(const_cast<char *>("PYTHONEXECUTABLE")); 30 31 // Always enable Python "-s" option. We don't need user-site directories, 32 // everything's supposed to be hermetic. 33 Py_NoUserSiteDirectory = 1; 34 35 // Ignore PYTHONPATH and PYTHONHOME from the environment. Unless we're not 36 // running from inside the zip file, in which case the user may have 37 // specified a PYTHONPATH. 38 #ifdef ANDROID_AUTORUN 39 Py_IgnoreEnvironmentFlag = 1; 40 #endif 41 42 Py_DontWriteBytecodeFlag = 1; 43 44 // Resolving absolute path based on argv[0] is not reliable since it may 45 // include something unusable, too bad. 46 // android::base::GetExecutablePath() also handles for Darwin/Windows. 47 std::string executable_path = android::base::GetExecutablePath(); 48 49 // Set the equivalent of PYTHONHOME internally. 50 Py_SetPythonHome(strdup(executable_path.c_str())); 51 52 #ifdef ANDROID_AUTORUN 53 argc += 1; 54 char **new_argv = reinterpret_cast<char**>(calloc(argc, sizeof(*argv))); 55 56 // Inject the path to our binary into argv[1] so the Py_Main won't parse any 57 // other options, and will execute the __main__.py script inside the zip file 58 // attached to our executable. 59 new_argv[0] = argv[0]; 60 new_argv[1] = strdup(executable_path.c_str()); 61 for (int i = 1; i < argc - 1; i++) { 62 new_argv[i+1] = argv[i]; 63 } 64 argv = new_argv; 65 #endif 66 67 return Py_Main(argc, argv); 68 } 69
