Date: Tue, 10 Jul 2001 00:04:07 GMT
From: "John W. Krahn" <krahnj@acm.org>
Subject: Re: Some perl questions
Message-Id: <3B4A46BF.A5125FF8@acm.org>

Kevin Joseph wrote:
> 
> I have the following Perl related questions. Any assistance would be highly
> appreciated.
> 
> 1.  What does the following do ? Does it return the error level ?

system() returns the return from "some command". Read the documentation.

perldoc -f system

> $rc = 0xffff & system ( "some command" ) ;
> 
> 2.  What does the following do ? Is it for initializing ?

shift() shifts a scalar from an array. Read the documentation.

perldoc -f shift

> $abc = shift ;
> 
> 3. I have written a couple of cgi scripts which run some system commands.
> Say
> 
> print "Content type : text/html" ;
> ..
> ...
> $abc = `ptree 128` ;
> for $i ( 0 .. $#abc ) {
>     print "$abc[$i]<BR> " ;
>   }

print "$_<BR>" for `ptree 128`;


> The problem with this script is that it does not print the spaces which
> appear ( if at all ) before $abc[$i]
> So instead of outputing
>   10 some proces
>          100  some sub process
>                  100 some child process
> 
> it prints
> 
> 10 some proces
> 100  some sub process
> 100 some child process
> 
> How do I fix this ?

That is an HTML question, sorry I don't know HTML.



John
-- 
use Perl;
program
fulfillment