Only one I could think of is posix_spawn[0], although it has different constraints than fork()/exec()... [0]: https://pubs.opengroup.org/onlinepubs/9699919799/

Only one I could think of is posix_spawn[0], although it has different constraints than fork()/exec()... [0]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_spawn.html#tag_16_371 https://pubs.opengroup.org/onlinepubs/9699919799/functions/p...