FORK_FAILURE      294 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      393 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      450 src/subshell/common.c     my_exit (FORK_FAILURE);
FORK_FAILURE     1880 src/subshell/common.c             if (WIFEXITED (status) && WEXITSTATUS (status) != FORK_FAILURE)