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// Copyright 2017 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <Python.h>
#include <android-base/file.h>
#include <osdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
int main(int argc, char *argv[]) {
// PYTHONEXECUTABLE is only used on MacOs X, when the Python interpreter
// embedded in an application bundle. It is not sure that we have this use case
// for Android hermetic Python. So remove this environment variable to make
// our self-contained environment more strict.
// For user (.py) program, it can access hermetic .par file path through
// sys.argv[0].
unsetenv(const_cast<char *>("PYTHONEXECUTABLE"));
// Always enable Python "-s" option. We don't need user-site directories,
// everything's supposed to be hermetic.
Py_NoUserSiteDirectory = 1;
// Ignore PYTHONPATH and PYTHONHOME from the environment.
Py_IgnoreEnvironmentFlag = 1;
Py_DontWriteBytecodeFlag = 1;
// Resolving absolute path based on argv[0] is not reliable since it may
// include something unusable, too bad.
// android::base::GetExecutablePath() also handles for Darwin/Windows.
std::string executable_path = android::base::GetExecutablePath();
// Set the equivalent of PYTHONHOME internally.
Py_SetPythonHome(strdup(executable_path.c_str()));
int new_argc = argc + 1;
char **new_argv = reinterpret_cast<char**>(calloc(new_argc, sizeof(*argv)));
// Inject the path to our binary into argv[1] so the Py_Main won't parse any
// other options, and will execute the __main__.py script inside the zip file
// attached to our executable.
new_argv[0] = argv[0];
new_argv[1] = strdup(executable_path.c_str());
for (int i = 1; i < argc; i++) {
new_argv[i+1] = argv[i];
}
return Py_Main(new_argc, new_argv);
}
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