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Full Discussion: Comparing Version Numbers
Top Forums UNIX for Dummies Questions & Answers Comparing Version Numbers Post 302269331 by jim mcnamara on Wednesday 17th of December 2008 11:43:58 AM
Old 12-17-2008
Oh. details like that help a lot.
One way to do this try this for starters-
Code:
#!/bin/ksh
# input versionstring1   versionstring2  example: 10.10.1  10.8.3
# returns 0 if string1 = string2  
#          <0 if string1 < string2 
#           >0  if string1 > string2
# this assumes xx.xx.xx for version number
vercmp()
{
     IFS=.
     echo "$1"  | read a1 b1 c1
     echo "$2"  | read a2 b2 c2
     IFS=" "
     r1=$((a1 - a2))
     r2=$((b1 - b2))
     r3=$((c1 - c2))
     tot=$((r1 + r2 + r3))
     if [ $tot -eq 0 ] ; then
         print 0
         return 0
     fi
     if [[ $r1 -gt 0 || $r2 -gt 0 || $r3 -gt 0 ]] ; then  # changed
         print 1
         return 0
     fi
     retval="-1"        # changed
     echo  "$retval"  # changed

}

#usage:
if [ $(vercmp 10.10.1 10.2.4) -gt -1 ] ; then
       echo "version okay"
else
       echo "version too old"
fi


Last edited by jim mcnamara; 12-17-2008 at 02:03 PM..
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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