V3/man/man8/ps.8

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.he 'PS (VIII)'1/20/73'PS (VIII)'
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NAME		ps -- process status
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SYNOPSIS	/usr/adm/ps [ -xlt____ ]
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DESCRIPTION
.br
.in 8
ps__
prints certain facts about active
processes.
The information is columnar and consists of:

.in +3
The (numerical) ID of the user associated
with the process;

The last character of the control typewriter of the process
or "x" if there is no control typewriter;
"x" lines are suppressed unless the "x" option
is given.

The number of 512-byte disk blocks holding the core
image of the process;

The process's unique ID (only with "l" option)

The number of hours (mod 100) and minutes of system, disk, and
user-process time accumulated by the process and
all its terminated descendants (only with "t" option)

An educated guess as to the command line which caused the
process to be created.

.in -3
Some caveats:

The guess as to the command name and arguments is obtained by examining
the process's stack.
The process is entitled to destroy this information.
Also, only processes whose core images are on disk have
visible names.
The ps__ command in particular
does not, nor does any other process which happens to
be in core at the same time.
ps__ tries to overcome this limitation by spawning
a subprocess designed to take up the other core
slot, and is usually successful.
Because ps__ examines a dynamically changing data structure,
it can produce incorrect results, for example if
a process's core image moves between the time
ps__ gets its disk address and reads its stack.

Besides its utility for simple spying,
ps__ is the only plausible
way to find the process number of someone you are trying
to kill (VIII).
.sp
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FILES		/dev/rf0,
/sys/sys/unix (to get magic numbers).
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SEE ALSO	kill (VIII)
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DIAGNOSTICS	"Bad RF", if
a bad swap address turns up;
various missing-file diagnostics.
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BUGS		As described.