6 int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int srcfd, int fd)
8 if (srcfd < 0 || fd < 0) return EBADF;
9 struct fdop *op = malloc(sizeof *op);
10 if (!op) return ENOMEM;
14 if ((op->next = fa->__actions)) op->next->prev = op;