If you post code, logs, data etc. use code-tags for better readability please.
Ok, processing the relevant part of your output:
Setting | as field separator
$NF is the last field, checking if it contains the pattern Alive
If so, the stuff in the curly braces is being done, ie. it increases the record counter r by +1 and the Alive counter a by 1. With the record counter we track how many rows we processed over all.
If it doesn't find the pattern "Alive" in the last field, it will use this line and check $NF for the pattern "Down". It increases the record counter by 1 and the Down counter d. The Down counter is not necessary but maybe for future use.
In the end, when all lines are processed, it checkes the variables and if the Alive counter is not equal the number of processed relevant rows/records, it will spit an error message as you can see.
All other lines that don't fit to the 2 rules $NF ~ /Alive/ or $NF ~ /Down/ are just bypassed.
Last edited by zaxxon; 02-02-2009 at 12:18 PM..
Reason: Exploring the LIST-tag :)
On AIX 5.2, I use "ps -ef " command to display the process status, the field of command looks like: , the detailed contents are:
# ps -ef |grep rtesfmrt
Display:
osa 32455 1 0 18:20 - 1:57
The origianl format shoud be:
osa 32455 1 0 18:20 - 1:57 ... (2 Replies)
Hi,
I am writing a shell script to invoke a C++ program. Before I start the C++ program (oi7loadbalancer), I am checking if the process is already running. I start the process only if it is not already running. I have the following check in my script.
proccount=`ps -f -u $USER_NAME | grep... (8 Replies)
Hi all,
How can a process be aware of the signals it handles. I looked at available signal API, but couldn't find any help.
If a process defines it own handler for a signal, the default handler for that signal becomes overridden.
I am interested in getting to know the... (2 Replies)
hello everybody!!
i want to post a question!
is there any way to get process status using C commands?
To be more specific, i want to know whether a process is running or is stop or killed.
thanks in advance! (3 Replies)
All,
I have fair amount of knowledge about shell scripting, but only liitle on system administration.
I would like to know how to analyze whether the particular linux process is alive or not ? If it is alive, will it affect the performace of other process ?.
Also is it still consuming... (1 Reply)
;)Hi Everyone,
I am using solaris 5.10.
I have a java process running in server mode in unix.
The problem is that it automatically forks i.e creates a child process.
I mean suddenly two instances of that process start running , in which the process-id of first instance is the parent... (0 Replies)
Hi Everyone,
I am using solaris 5.10.
I have a java process running in server mode in unix.
The problem is that it automatically forks i.e creates a child process.
I mean suddenly two instances of that process start running , in which the process-id of first instance is the parent... (5 Replies)
Hi,
I have a cron job which runs every ten minutes, now i hav to check the process whether it is running or not only once and then this should be sent to a log file..
crontab :
00,10,20,30,40,50 * * * * a
process check
ps = 'ps -ef |grep a '
if
then
echo " Success" >... (3 Replies)
I have run 10 instances of the process eg, process name is BG
nohup /WP01IRB1_irbapp/IRBWPROD/RB/bin/BG -c 1 -t 23 -a '-caTop TESTBILLCYCLE='5FEB13_81PT19NPT''>a.txt &
nohup /WP01IRB1_irbapp/IRBWPROD/RB/bin/BG -c 2 -t 23 -a '-caTop TESTBILLCYCLE='5FEB13_81PT19NPT''>b.txt &
nohup... (3 Replies)
Hi,
I want to write one program in C in Unix OS which will check the running status of a process time to time. If the process is stopped somehow by any means, it will ensure that the process is restarted and only one copy of the process image should run in memory at any point of time for the user.... (2 Replies)
Discussion started by: sanzee007
2 Replies
LEARN ABOUT DEBIAN
vend::counterfile
Vend::CounterFile(3pm) User Contributed Perl Documentation Vend::CounterFile(3pm)NAME
Vend::CounterFile - Persistent counter class
SYNOPSIS
use Vend::CounterFile;
$c = new Vend::CounterFile "COUNTER", "aa00";
$id = $c->inc;
open(F, ">F$id");
DESCRIPTION
(This module is modified from Gisle Aas File::CounterFile to use
Interchange's locking protocols -- lack of fcntl locking was causing
counter problems.)
This module implements a persistent counter class. Each counter is represented by a separate file in the file system. File locking is
applied, so multiple processes might try to access the same counters at the same time without risk of counter destruction.
You give the file name as the first parameter to the object constructor ("new"). The file is created if it does not exist.
If the file name does not start with "/" or ".", then it is interpreted as a file relative to $Vend::CounterFile::DEFAULT_DIR. The default
value for this variable is initialized from the environment variable "TMPDIR", or /usr/tmp is no environment variable is defined. You may
want to assign a different value to this variable before creating counters.
If you pass a second parameter to the constructor, that sets the initial value for a new counter. This parameter only takes effect when
the file is created (i.e. it does not exist before the call).
When you call the "inc()" method, you increment the counter value by one. When you call "dec()" the counter value is decrementd. In both
cases the new value is returned. The "dec()" method only works for numerical counters (digits only).
You can peek at the value of the counter (without incrementing it) by using the "value()" method.
The counter can be locked and unlocked with the "lock()" and "unlock()" methods. Incrementing and value retrieval is faster when the
counter is locked, because we do not have to update the counter file all the time. You can query whether the counter is locked with the
"locked()" method.
There is also an operator overloading interface to the Vend::CounterFile object. This means that you might use the "++" operator for
incrementing the counter, "--" operator for decrementing and you can interpolate counters diretly into strings.
BUGS
(This problem alleviated by this modified module)
It uses flock(2) to lock the counter file. This does not work on all systems. Perhaps we should use the File::Lock module?
COPYRIGHT
Copyright (c) 1995-1998 Gisle Aas. All rights reserved. Modifications made by and copyright (C) 2002 Red Hat, Inc. and (c) 2002-2007
Interchange Development Group
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
AUTHOR
Gisle Aas <aas@sn.no>
perl v5.14.2 2010-03-25 Vend::CounterFile(3pm)