Bash to sh conversion Post: 302891208

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Top Forums Shell Programming and Scripting Bash to sh conversion Post 302891208 by SkySmart on Tuesday 4th of March 2014 11:29:56 AM

03-04-2014

Registered User

Bash to sh conversion

Code:

declare -i DEFINT=1
declare -i DEFDELAY=1
declare -i timeout=DEFTOUT
declare -i interval=DEFINT
declare -i delay=DEFDELAY

if (($# == 0 || interval <= 0)); then
    printUsage
    exit 1
fi

(
    ((t = timeout))

    while ((t > 0)); do
        sleep $interval
        kill -0 $$ || exit 0
        ((t -= interval))
    done

    kill -s SIGTERM $$ && kill -0 $$ || exit 0
    sleep $delay
    kill -s SIGKILL $$
) 2> /dev/null &

this works quite well if the first line of the script is: #!/bin/bash.

but i need this to run in a sh script, a script whose first line is: "#!/bin/sh"

how can the above be written in sh so it passes?

I tried the following and it failed miserably:

Code:

DEFINT=1
DEFDELAY=1
timeout=${DEFTOUT}
interval=${DEFINT}
delay=${DEFDELAY}

if [ $# -eq 0 ] || [ ${interval} -le 0] ; then
    echo "ERROR: WRONG USAGE!"
    exit 1
fi

t=${timeout}

    while (($t > 0)); do
        sleep $interval
        kill -0 $$ || exit 0
        (($t -= $interval))
    done

    kill -s SIGTERM $$ && kill -0 $$ || exit 0
    sleep $delay
    kill -s SIGKILL $$

SkySmart

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perl::critic::policy::subroutines::prohibitbuiltinhomonyms

Perl::Critic::Policy::Subroutines::ProhibitBuiltinHomonyUserpContributed Perl DocumPerl::Critic::Policy::Subroutines::ProhibitBuiltinHomonyms(3pm)

NAME

       Perl::Critic::Policy::Subroutines::ProhibitBuiltinHomonyms - Don't declare your own "open" function.

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Common sense dictates that you shouldn't declare subroutines with the same name as one of Perl's built-in functions or keywords.  See
       perlfunc for a list of built-in functions; see perlsyn for keywords.

	 sub open {}	#not ok
	 sub exit {}	#not ok
	 sub print {}	#not ok
	 sub foreach {} #not ok
	 sub if {}	#not ok

	 #You get the idea...

       Exceptions are made for "BEGIN", "END", "INIT" and "CHECK" blocks, as well as "AUTOLOAD", "DESTROY", and "import" subroutines.

CONFIGURATION

       This Policy is not configurable except for the standard options.

CAVEATS

       It is reasonable to declare an object method with the same name as a Perl built-in function, since they are easily distinguished from each
       other.  However, at this time, Perl::Critic cannot tell whether a subroutine is static or an object method.

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.14.2							    2012-06-07	   Perl::Critic::Policy::Subroutines::ProhibitBuiltinHomonyms(3pm)

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