FORK_FAILURE      326 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      461 src/subshell/common.c         my_exit (FORK_FAILURE);
FORK_FAILURE      520 src/subshell/common.c     my_exit (FORK_FAILURE);
FORK_FAILURE     2146 src/subshell/common.c             if (WIFEXITED (status) && WEXITSTATUS (status) != FORK_FAILURE)