FreeBSD Manual Pages
- posix_spawn_file_actions_addopen(3), posix_spawn_file_actions_adddup2(3), posix_spawn_file_actions_addclose(3), posix_spawn_file_actions_addclosefrom_np(3), posix_spawn_file_actions_addchdir_np(3), posix_spawn_file_actions_addfchdir_np(3)
- add open, dup2, close, closefrom, or chdir/fchdir actions to spawn file actions object