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