| // Copyright 2011 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. | |
| using namespace std; | |
| void RunBrowsePython(State* state, const char* ninja_command, | |
| const char* input_file, int argc, char* argv[]) { | |
| // Fork off a Python process and have it run our code via its stdin. | |
| // (Actually the Python process becomes the parent.) | |
| int pipefd[2]; | |
| if (pipe(pipefd) < 0) { | |
| perror("ninja: pipe"); | |
| return; | |
| } | |
| pid_t pid = fork(); | |
| if (pid < 0) { | |
| perror("ninja: fork"); | |
| return; | |
| } | |
| if (pid > 0) { // Parent. | |
| close(pipefd[1]); | |
| do { | |
| if (dup2(pipefd[0], 0) < 0) { | |
| perror("ninja: dup2"); | |
| break; | |
| } | |
| std::vector<const char *> command; | |
| command.push_back(NINJA_PYTHON); | |
| command.push_back("-"); | |
| command.push_back("--ninja-command"); | |
| command.push_back(ninja_command); | |
| command.push_back("-f"); | |
| command.push_back(input_file); | |
| for (int i = 0; i < argc; i++) { | |
| command.push_back(argv[i]); | |
| } | |
| command.push_back(NULL); | |
| execvp(command[0], const_cast<char**>(&command[0])); | |
| if (errno == ENOENT) { | |
| printf("ninja: %s is required for the browse tool\n", NINJA_PYTHON); | |
| } else { | |
| perror("ninja: execvp"); | |
| } | |
| } while (false); | |
| _exit(1); | |
| } else { // Child. | |
| close(pipefd[0]); | |
| // Write the script file into the stdin of the Python process. | |
| // Only write n - 1 bytes, because Python 3.11 does not allow null | |
| // bytes in source code anymore, so avoid writing the null string | |
| // terminator. | |
| // See https://github.com/python/cpython/issues/96670 | |
| auto kBrowsePyLength = sizeof(kBrowsePy) - 1; | |
| ssize_t len = write(pipefd[1], kBrowsePy, kBrowsePyLength); | |
| if (len < (ssize_t)kBrowsePyLength) | |
| perror("ninja: write"); | |
| close(pipefd[1]); | |
| exit(0); | |
| } | |
| } | |