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Full Discussion: Q1 :/dev/null Q2 -A
Top Forums UNIX for Advanced & Expert Users Q1 :/dev/null Q2 -A Post 88713 by blowtorch on Tuesday 8th of November 2005 08:51:28 AM
Old 11-08-2005
To answer your second question, I did a little googling:
I got this from the Linux man page:
Quote:
stat STAT multi-character process state. See section PROCESS STATE CODES for the different values meaning. See also s and state if you just want the first character displayed.
If you look up the PROCESS STATE CODES, this is what you get:
Quote:
D
Uninterruptible sleep (usually IO)
R
Running or runnable (on run queue)
S
Interruptible sleep (waiting for an event to complete)
T
Stopped, either by a job control signal or because it is being traced.
W
paging (not valid since the 2.6.xx kernel)
X
dead (should never be seen)
Z
Defunct ("zombie") process, terminated but not reaped by its parent.
The state 'A' does not appear.

--EDIT--
Even the HP-UX man page does not list a process state 'A'. HP ps does not have a STAT column, it has S instead.
S (l) The state of the process:
0 non-existent;
S sleeping;
W waiting;
R running;
I intermediate;
Z terminated;
T stopped;
X growing.
--/EDIT--
--EDIT--
Ditto with Sun
S (l)
The state of the process:
O
Process is running on a processor.
S
Sleeping: process is waiting for an event to complete.
R
Runnable: process is on run queue.
Z
Zombie state: process terminated and parent not waiting.
T
Process is stopped, either by a job control signal or because it is being traced.
--/EDIT--
Last edited by blowtorch; 11-08-2005 at 10:04 AM..
 

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LEARN ABOUT CENTOS

mem

MEM(4)							     Linux Programmer's Manual							    MEM(4)

NAME

       mem, kmem, port - system memory, kernel memory and system ports

DESCRIPTION

       mem  is	a  character  device  file that is an image of the main memory of the computer.  It may be used, for example, to examine (and even
       patch) the system.

       Byte addresses in mem are interpreted as physical memory addresses.  References to nonexistent locations cause errors to be returned.

       Examining and patching is likely to lead to unexpected results when read-only or write-only bits are present.

       It is typically created by:

	      mknod -m 660 /dev/mem c 1 1
	      chown root:kmem /dev/mem

       The file kmem is the same as mem, except that the kernel virtual memory rather than physical memory is accessed.

       It is typically created by:

	      mknod -m 640 /dev/kmem c 1 2
	      chown root:kmem /dev/kmem

       port is similar to mem, but the I/O ports are accessed.

       It is typically created by:

	      mknod -m 660 /dev/port c 1 4
	      chown root:mem /dev/port

FILES

       /dev/mem
       /dev/kmem
       /dev/port

SEE ALSO

       chown(1), mknod(1), ioperm(2)

COLOPHON

       This page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    1992-11-21								    MEM(4)
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