FORK_FAILURE      293 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      428 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      487 src/subshell/common.c     my_exit (FORK_FAILURE);
FORK_FAILURE     1952 src/subshell/common.c             if (WIFEXITED (status) && WEXITSTATUS (status) != FORK_FAILURE)