ps(1) DG/UX 4.30 ps(1)
NAME
ps - report process status
SYNOPSIS
ps [ options ]
DESCRIPTION
Ps prints certain information about active processes.
Without options, information is printed about processes
associated with the current terminal. The output consists
of a short listing containing only the process ID, terminal
identifier, cumulative execution time, and the command name.
Otherwise, the information displayed is controlled by the
selection of options.
Options using lists as arguments can specify them in two
forms: a list of identifiers separated by commas, or a list
of identifiers enclosed in double quotes and separated from
one another by a comma and/or one or more spaces.
The options are:
-e Print information about all processes.
-d Print information about all processes, except
process group leaders.
-a Print information about all processes, except
process group leaders and processes not
associated with a terminal.
-f Generate a full listing. (See below for meaning
of columns in a full listing).
-l Generate a long listing (see below).
-t termlist List data only about the processes associated
with the terminals given in termlist. Terminal
identifiers may be specified as: the device's
filename (e.g., tty04) or if the device's
filename starts with tty, just the digit
identifier (e.g., 04).
-p proclist List data only about processes whose process ID
numbers are given in proclist.
-u uidlist List data only about processes whose user ID
numbers or login names are given in uidlist. In
the listing, the numerical user ID is printed
unless the -f option is used, in which case the
login name will be printed.
-g grplist List data only about processes whose process
group leaders are given in grplist.
The column headings and the meaning of the columns in a ps
listing are given below; the letters f and l indicate the
option (full or long) that causes the corresponding heading
to appear; all means that the heading always appears. Note
that these two options determine only what information is
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ps(1) DG/UX 4.30 ps(1)
provided for a process; they do not determine which
processes will be listed.
F (l) Flags (octal and additive) associated with
the process:
1 Process is being traced;
2 Process is bound to a virtual
processor;
4 Process is not bound to a virtual
processor;
S (l) The state of the process:
- Non-existent;
S Sleeping;
W Waiting;
R Running;
I Intermediate;
Z Terminated;
T Stopped;
UID (f,l) The user ID number of the process owner; the
login name is printed under the -f option.
PID (all) The process ID of the process; you can kill
a process if you know this datum.
PPID (f,l) The process ID of the parent process.
C (f,l) Processor utilization, represented by an
integer from 0 to 7. This number reflects a
process' relative interactivity. A process
with 7 is highly interactive. A process
with 0 is not considered interactive, but
uses mostly CPU resources. You cannot
control this value; it is produced
dynamically by the kernel.
PRI (l) The priority of the process; higher numbers
mean lower priority.
NI (l) Nice value; used in priority computation.
ADDR The memory address of the process.
SZ (l) The size in blocks of the resident memory
image of the process including shared and
unshared segments.
WCHAN (l) The event for which the process is waiting
or sleeping; if blank, the process is
running.
STIME (f) Starting time of the process, in
hours:minutes:seconds.
TTY (all) The controlling terminal for the process.
TIME (all) The cumulative execution time for the
process, in minutes:seconds.
CMD (all) The command name; the full command name and
its arguments are printed under the -f
option.
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ps(1) DG/UX 4.30 ps(1)
A process that has exited and has a parent, but has not yet
been waited for by the parent, is marked <defunct>.
Under the -f option, ps tries to determine the command name
and arguments given when the process was created by
examining the process stack. Failing this, the command
name, as it would appear without the -f option, is printed
in square brackets.
EXAMPLES
$ ps
Prints information about active processes associated with
the current terminal. Lists the process ID, the tty number
of the controlling terminal.
$ ps -u xyz,abc
Prints information about active processes belonging to the
login names "xyz" and "abc". Lists the process ID, tty
number, time the process took to execute, and the command.
$ ps -ef
Prints information on all active processes. Lists the user
ID, process ID, process ID of the parent process, scheduling
information, process starting time, tty number, execution
time for the process, and the command and its options.
FILES
/etc/passwd Supplies UID information
/etc/ps_data Internal data structure
/dev Searched to find terminal (tty) names
SEE ALSO
acctcom(1), kill(1), nice(1).
BUGS
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.
NOTES
DG/UX ps extracts information from the currently running
kernel. The -c, -n, and -s options are not implemented.
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