Shell script help

[Norberto Meijome]

Kevin Kinsey wrote:
> 
> =================
> 
> # Rule number variable
>   RuleNum=100
> 
> #################################
> # this function increments $RulNum var by 100... #
> #################################
> 
> inc () {
>   RuleNum=$(expr $1 "+" 100)
> }
> 
> 
> ##################
> #   LET'S GET STARTED   #
> ##################
> 
> # flush the ruleset ...
>   /sbin/ipfw -q flush
> 
> # set up the loopback ...
>   $FW $RuleNum allow ip from any to any via $loopback
>   inc $RuleNum
> 
> # deny localhost traffic on other interfaces
>   $FW $RuleNum deny ip from 127.0.0.0/8 to any
>   inc $RuleNum
>   $FW $RuleNum deny ip from any to 127.0.0.0/8
>   inc $RuleNum
> 
> ==================

nice use...but what's the point ? ipfw assigns rule #s automatically.

I agree that you may want to hardcode your rule #s (0-100 for localhost, 
200 - 5000 for LAN, etc) but using your inc() process defeats the 
purpose of this.

just my $0.02
Beto