порождать процесс (spawn a process)
Ошибки (Error)
The posix_spawn
() and posix_spawnp
() functions fail only in the
case where the underlying fork(2), vfork(2), or clone(2) call
fails; in these cases, these functions return an error number,
which will be one of the errors described for fork(2), vfork(2),
or clone(2).
In addition, these functions fail if:
ENOSYS
Function not supported on this system.