fix usage of locks with vfork

[musl] / src / process / posix_spawn_file_actions_addopen.c

diff --git a/src/process/posix_spawn_file_actions_addopen.c b/src/process/posix_spawn_file_actions_addopen.c
index 5e2c86d..368922c 100644 (file)
--- a/src/process/posix_spawn_file_actions_addopen.c
+++ b/src/process/posix_spawn_file_actions_addopen.c
@@ -4,7 +4,7 @@
 #include <errno.h>
 #include "fdop.h"
 
-int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *fa, int fd, const char *path, int flags, mode_t mode)
+int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *restrict fa, int fd, const char *restrict path, int flags, mode_t mode)
 {
        struct fdop *op = malloc(sizeof *op + strlen(path) + 1);
        if (!op) return ENOMEM;
@@ -13,7 +13,8 @@ int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *fa, int fd, con
        op->oflag = flags;
        op->mode = mode;
        strcpy(op->path, path);
-       op->next = fa->__actions;
+       if ((op->next = fa->__actions)) op->next->prev = op;
+       op->prev = 0;
        fa->__actions = op;
        return 0;
 }