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Full Discussion: Determine uniqueness of pid to name output files
Top Forums UNIX for Dummies Questions & Answers Determine uniqueness of pid to name output files Post 302796021 by vkumbhakarna on Thursday 18th of April 2013 06:19:42 PM
Old 04-18-2013
Determine uniqueness of pid to name output files
Hi,

We've a process on AIX UNIX server which is executed by multiple uses during a day. I wish to create a log file for every time the process is executed. I wish to know how unique are PID(s) on AIX UNIX servers if I were to name the log files with <date> and <PID>?

E.g. If I create my output files having the details such as
Code:
`date +%Y%m%d`_${$}_out.csv

With my limited understanding of UNIX and from what I've read on the forum https://www.unix.com/unix-advanced-expert-users/2896-obtaining-process-id-pid.html AIX system sequentially assigns a limited set of PIDs and re-utilizes them as and when processes get freed and slot is available for allocation by dispatcher.

Please suggest a suitable way to uniquely identify the process execution during the day. I am also considering adding datetime hh:mm:ss to the log name to uniquely identify the same E.g. change log file name to
Code:
 `date +%Y%m%d_%H%M%S`_${$}_out.csv

Thanks,
Last edited by vkumbhakarna; 04-18-2013 at 07:25 PM..
 

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LEARN ABOUT REDHAT

logwatch

LOGWATCH(8)							   User Manuals 						       LOGWATCH(8)

NAME

       logwatch - system log analyzer and reporter

SYNOPSIS

       logwatch  [--detail level ] [--logfile log-file-group ] [--service service-name ] [--print] [--mailto address ] [--archives] [--range range
       ] [--debug level ] [--save file-name ] [--logdir directory ] [--hostname hostname ] [--help|--usage]

DESCRIPTION

       LogWatch is a customizable, pluggable log-monitoring system.  It will go through your logs for a given period of time and make a report	in
       the areas that you wish with the detail that you wish.  Easy to use - works right out of the package on almost all systems.

OPTIONS

       --detail level
	      This is the detail level of the report.  level can be high, med, low.

       --logfile log-file-group
	      This will force LogWatch to process only the set of logfiles defined by log-file-group (i.e. messages, xferlog, ...).  LogWatch will
	      therefore process all services that use those logfiles.  This option can be specified more than once to  specify	multiple  logfile-
	      groups.

       --service service-name
	      This will force LogWatch to process only the service specified in service-name (i.e. login, pam, identd, ...).  LogWatch will there-
	      fore also process any log-file-groups necessary to process these services.  This option can be specified more than once  to  specify
	      multiple	services to process.  A useful service-name is All which will process all services (and logfile-groups) for which you have
	      filters installed.

       --print
	      Print the results to stdout (i.e. the screen).

       --mailto address
	      Mail the results to the email address or user specified in address.

       --archives
	      Each log-file-group has basic logfiles (i.e. /var/log/messages) as well  as  archives  (i.e.  /var/log/messages.?  or  /var/log/mes-
	      sages.?.gz).   This  option  will  make  LogWatch search through the archives in addition to the regular logfiles.  The entries must
	      still be in the proper date range (see below) to be processed, however.

       --range range
	      You can specify a date-range to process.	This option is currently limited to only Yesterday, Today and All.

       --debug level
	      For debugging purposes.  level can range from 0 to 100.  This will really clutter up your output.  You probably don't  want  to  use
	      this.

       --save file-name
	      Save the output to file-name instead of displaying or mailing it.

       --logdir directory
	      Look in directory for log files instead of the default directory.

       --hostname hostname
	      Use  hostname for the reports instead of this system's hostname.	In addition, if HostLimit is set in /etc/log.d/logwatch.conf, then
	      only logs from this hostname will be processed (where appropriate).

       --usage
	      Displays usage information

       --help same as --usage.

FILES

       /etc/log.d/logwatch.conf
	      Really a symlink to /etc/log.d/conf/logwatch.conf.  This file sets the default values of all the above options.  These defaults  are
	      used when LogWatch is called without any parameters (i.e. from cron.daily).  The file is well-documented, but the explanations above
	      also apply to this config file.
       /etc/log.d/conf/services/*
	      Configuration files for the various services whose log entries LogWatch can process.
       /etc/log.d/conf/logfiles/*
	      Configuration files for the various logfiles that the above service's log entries are stored in.
       /etc/log.d/scripts/shared/*
	      Filters common to many services and/or logfiles.
       /etc/log.d/scripts/logfiles/*
	      Filters specific to just particular logfiles.
       /etc/log.d/scripts/services/*
	      Actual filter programs for the various services.

EXAMPLES

       logwatch --service ftpd-xferlog --range all --detail high --print --archives
	      This will print out all FTP transfers that are stored in all current and archived xferlogs.
       logwatch --service pam_pwdb --range yesterday --detail high --print
	      This will print out login information for the previous day...

MORE INFORMATION

       For information on adding your own filter, please see the file HOWTO-Make-Filter which should have been included  with  Logwatch.   If  you
       installed from an RPM, it is probably under /usr/share/doc/logwatch-XXX.

BUGS

       The --range option is very weak... this will be fixed in the future.

AUTHOR

       Kirk Bauer <kirk@kaybee.org>

       http://www.kaybee.org/~kirk

       ftp://ftp.kaybee.org/pub/redhat/RPMS

Linux								    MARCH 1998							       LOGWATCH(8)
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