...2.24, the posix_spawn () function commences by calling clone (2) with CLONE_VM and CLONE_VFORK flags. Older implementations use fork (2), or possibly vfork (2) (see below). The …...2.24, the posix_spawn () function commences by calling clone (2) with CLONE_VM and CLONE_VFORK flags. Older implementations use fork (2), or possibly vfork (2) (see below). The …...created using clone (2), unless the clone flags include CLONE_VM and do not include CLONE_VFORK , in which case any alternate signal stack that was established in the parent is …