Top Forums Shell Programming and Scripting How to calculate time difference between start and end time of a process! Post 302450482 by kchinnam on Thursday 2nd of September 2010 10:56:01 PM
I do not have GNU date. So I got frustrated with limited options to get elapsed time in Unix,, I wrote a method in Java and using it..
If this works I could replace java method with this..

diffTime=`expr ${endTime} - ${startTime}`

Does this approach work if a main program is calling say 1. common functions included from other ksh programs and 2. included java programs(from jar/class) ? I know PID is same thrughout the execution of my program.

In other words can we use this to reliably find elapsed time to execute complex Admin scripts in Unix ?

say my environment variable is this
: once I execute Does it start incrementing SECONDS as soon as any PID starts in the runtime and ends incrimenting before that PID exits from shell !?

Last edited by kchinnam; 09-03-2010 at 01:03 AM.. Reason: more doubts..
Test Your Knowledge in Computers #921
Difficulty: Medium
Unix Epoch Time cannot be extended backwards from the epoch date.
True or False?

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JH_MANIFEST(1)							    Javahelper							    JH_MANIFEST(1)

jh_manifest - Adds or/and modifies manifests for jars SYNOPSIS
jh_manifest [debhelperoptions] [options] jar1 ... jarN jh_manifest [debhelperoptions] [options] DESCRIPTION
Javahelper tool to add or update manifests in a jar file. It can be used in two modes. If passed jar files, it will only process these jar files. Otherwise it will update all jar files in the packages it acts on. When processing a package, the debhelper(7) exclude option will make jh_manifest ignore matching jar files. FILES
debian/package.manifest (or debian/manifest) This file consist of a list of jar files and values to add to their manifests. Values in this file will take precedence over values in the original manifest (and command line arguments over values in this file). It is allowed to list a link in this file instead of an actual jar file, provided that the link can be resolved when jh_manifest processes it. If a jar file is listed here cannot be found, jh_manifest will print a warning, unless the jar file has been excluded. As of javahelper >= 0.32, you may add comments in this file. If the line starts with a "#" it is completely ignored. This file is ignored if jh_manifest is passed jar files via command line. OPTIONS
-c classpath, --classpath=classpath Sets the Class-Path attribute of all processed jar files to classpath. If not passed, then the CLASSPATH environment variable will be used in the given jar file do not have a Class-Path attribute. -m class, --main=class Sets the Main-Class attribute to class in all processed jar files. -o options, --javaopts=options Sets the Debian-Java-Parameters to options in all processed jar files. This attribute is used by jarwrapper to start java with extra options (e.g. to make more memory available). -j /path/to/java/home, --java-home=/path/to/java/home Sets the Debian-Java-Home attribute to /path/to/java/home in all processed jars. This attribute is used by jarwrapper to determine which JVM to use. EXAMPLES
An example debian/manifest file: # use the symlink so we do not have to update with the next upstream release. usr/share/java/my.jar: Class-Path: dep1.jar dep2.jar Main-Class: some.awesome.Class usr/share/java/dep2.jar: Class-Path: dep1.jar SEE ALSO
debhelper(7) This program is a part of javahelper and uses debhelper as backend. There are also tutorials in /usr/share/doc/javahelper. AUTHOR
Copyright 2010 by Niels Thykier This tool is free software; you may redistribute it and/or modify it under the terms of GNU GPL 2. 0.43 2012-03-12 JH_MANIFEST(1)
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