posix_spawn_file_actions_addclose
int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *, int);
posix_spawn_file_actions_addclose(&action, stdin_pipe[1]);
posix_spawn_file_actions_addclose(&action, stdin_pipe[1]);
posix_spawn_file_actions_addclose(&action, stdin_pipe[1]);
posix_spawn_file_actions_addclose(&action, stdin_pipe[0]);
posix_spawn_file_actions_addclose(&action, stdout_pipe[1]);
posix_spawn_file_actions_addclose(&action,
posix_spawn_file_actions_addclose(&action, STDIN_FILENO);
posix_spawn_file_actions_addclose(&action, pipefds[1]);
if (posix_spawn_file_actions_addclose(&fa, s[0]) != 0) {