Handling RAM limits
val physical_ram :
unit -> int64
physical_ram () Returns the total amount of physical RAM in bytes.
val ram_limit_spec :
ram_limit_spec command line arguments to set ram limits.
val wrap_block_signals :
(unit -> 'a) -> 'a
wrap_block_signals f blocks all signals before execution of
restores them afterwards.
val ensure_at_exit :
unit -> unit
ensure_at_exit (): catch all signals, run at_exit functions,
then re-deliver the signal to self to ensure the default behavior.
at_exit functions are honored only when terminating by exit, not by signals,
so we need to do some tricks to get it run by signals too
val get_ppids :
Core.Std.Pid.t -> Core.Std.Pid.t list option
get_ppids pid returns the list of parent pids, up to init (1) for pid.