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Top Forums Shell Programming and Scripting compare versions. Post 302537978 by aigles on Monday 11th of July 2011 10:10:51 AM

07-11-2011

Registered User

A ksh solution :

Code:

#!/usr/bin/ksh
# Usage: $0 version1 version2

set -o nounset

oIFS="$IFS" ;IFS='.'
set -A v1 $1
set -A v2 $2
IFS="${oIFS}"

cnt1=${#v1[*]}
cnt2=${#v2[*]}
(( cnt1 > cnt2 )) && cnt=$cnt1 || cnt=$cnt2;

i=0
result="EQUAL"
while (( i <= cnt ))
do
    (( n1 = ${v1[$i]-} + 0 ))
    (( n2 = ${v2[$i]-} + 0 ))
    if (( n1 > n2 ))
    then
        result="GREATER"
        break
    elif (( n1 < n2 ))
    then
        result="LOWER"
        break
    fi
    (( i += 1 ))
done

print ${result} $1 $2

Examples:

Code:

$ ./cmpv.ksh 1.2.3 1.2.3
EQUAL 1.2.3 1.2.3
$ ./cmpv.ksh 1.2.4 1.2.3
GREATER 1.2.4 1.2.3
$ ./cmpv.ksh 1.2.4 1.2.4.1
LOWER 1.2.4 1.2.4.1

Jean-Pierre.

aigles

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LEARN ABOUT XFREE86

let

let(1)                                                             User Commands                                                            let(1)

NAME

       let - shell built-in function to evaluate one or more arithmetic expressions

SYNOPSIS

   ksh
       let arg...

DESCRIPTION

   ksh
       Each arg is a separate "arithmetic expression" to be evaluated.

EXIT STATUS

       The following exit values are returned:

       0        The value of the last expression is non-zero.

       1        The value of the last expression is zero.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), set(1), typeset(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                             let(1)

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