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Full Discussion: a shell script for review.
Top Forums Shell Programming and Scripting a shell script for review. Post 302359539 by robsonde on Tuesday 6th of October 2009 11:54:21 PM
Old 10-07-2009
Quote:
Originally Posted by cfajohnson

Translated to portable syntax that will run in any POSIX shell:

Code:
mon=$(( $mon + 1 ))
if [ $mon -lt 4 ]
then
   year=$(( $year - 1 ))
   mon=$(( mon + 12 ))
fi
j=$(( $year * 1461 / 4 + mon * 153 / 5 + $day ))
s=$(( ( ( (j-719606) * 24 + $hour ) * 60 + $min ) * 60 + $sec ))


I don't think you can do the $(( syntax in bourne shell...

my code was written for bourne shell as we dont run ksh or bash in our network.
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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