pipe 182 lib/services/services_linux.c if (pipe(data->pipe_fd) == -1) { pipe 1226 lib/services/services_linux.c if (pipe(stdout_fd) < 0) { pipe 1234 lib/services/services_linux.c if (pipe(stderr_fd) < 0) { pipe 1246 lib/services/services_linux.c if (pipe(stdin_fd) < 0) {