One of the following:
"idle": Process being created by fork, macOS only.
"running": Currently runnable on macOS and Windows. Actually
running on Linux.
"sleeping" Sleeping on a wait or poll.
"disk_sleep" Uninterruptible sleep, waiting for an I/O operation
"stopped" Stopped, either by a job control signal or because it
is being traced.
"tracing_stop" Stopped for tracing (Linux only).
"zombie" Zombie. Finished, but parent has not read out the exit
"dead" Should never be seen (Linux).
"wake_kill" Received fatal signal (Linux only).
"waking" Paging (Linux only, not valid since the 2.6.xx kernel).
Works for zombie processes.
Other process handle functions:
p <- ps_handle() p ps_status(p)