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Unix Version 7 - man page for ps (v7 section 1)

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PS(1)											    PS(1)

       ps - process status

       ps [ aklx ] [ namelist ]

       Ps prints certain indicia about active processes.  The a option asks for information about
       all processes with terminals (ordinarily only one's own processes are displayed);  x  asks
       even  about processes with no terminal; l asks for a long listing.  The short listing con-
       tains the process ID, tty letter, the cumulative execution time	of  the  process  and  an
       approximation to the command line.

       The long listing is columnar and contains

       F      Flags  associated with the process.  01: in core; 02: system process; 04: locked in
	      core (e.g. for physical I/O); 10:  being	swapped;  20:  being  traced  by  another

       S      The  state of the process.  0: nonexistent; S: sleeping; W: waiting; R: running; I:
	      intermediate; Z: terminated; T: stopped.

       UID    The user ID of the process owner.

       PID    The process ID of the process; as in certain cults it is possible to kill a process
	      if you know its true name.

       PPID   The process ID of the parent process.

       CPU    Processor utilization for scheduling.

       PRI    The priority of the process; high numbers mean low priority.

       NICE   Used in priority computation.

       ADDR   The core address of the process if resident, otherwise the disk address.

       SZ     The size in blocks of the core image of the process.

       WCHAN  The  event  for  which the process is waiting or sleeping; if blank, the process is

       TTY    The controlling tty for the process.

       TIME   The cumulative execution time for the process.

       The command and its arguments.

       A process that has exited and has a parent, but has not yet been waited for by the  parent
       is  marked  <defunct>.  Ps makes an educated guess as to the file name and arguments given
       when the process was created by examining core memory or the swap  area.   The  method  is
       inherently  somewhat  unreliable  and  in  any event a process is entitled to destroy this
       information, so the names cannot be counted on too much.

       If the k option is specified, the file /usr/sys/core is used in place of  /dev/mem.   This
       is used for postmortem system debugging.  If a second argument is given, it is taken to be
       the file containing the system's namelist.

       /unix	     system namelist
       /dev/mem      core memory
       /usr/sys/core alternate core file
       /dev	     searched to find swap device and tty names


       Things can change while ps is running; the picture it gives is only a close  approximation
       to reality.
       Some data printed for defunct processes is irrelevant

					      PDP11					    PS(1)
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