fix backwards posix_spawn file action order

[musl] / src / process / posix_spawn_file_actions_adddup2.c

diff --git a/src/process/posix_spawn_file_actions_adddup2.c b/src/process/posix_spawn_file_actions_adddup2.c
index 9209ee7..26f2c5c 100644 (file)
--- a/src/process/posix_spawn_file_actions_adddup2.c
+++ b/src/process/posix_spawn_file_actions_adddup2.c
@@ -10,7 +10,8 @@ int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int fd, int
        op->cmd = FDOP_DUP2;
        op->fd = fd;
        op->newfd = newfd;
-       op->next = fa->__actions;
+       if ((op->next = fa->__actions)) op->next->prev = op;
+       op->prev = 0;
        fa->__actions = op;
        return 0;
 }