Question

incorporating a shell script in Perl

Asked by: saibsk

$curr_count=10;
$prev_count=20;

STATUS =`bc <<EOF
     scale = 4
     curr = $curr_count
     prev = $prev_count
     pct_diff = curr * 100 / prev
     if (prev >= 100 || curr >= 100){
        if (pct_diff < 80){
                print "FAIL"
        }
     }

quit
EOF`

I need to include this in my perl script. Please advise

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Asked On
2009-10-13 at 15:08:11ID24809531
Topic

Perl Programming Language

Participating Experts
4
Points
500
Comments
7

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Answers

 

by: TintinPosted on 2009-10-13 at 15:26:08ID: 25565440

my $curr_count=10;
my $prev_count=20;
 
my $pct_diff = $curr_count * 100 / $prev_count;
 
if ($prev_count >= 100 or $curr_count >= 100) {
   print "FAIL\n" if $pct_diff < 80;
}
                                              
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Select allOpen in new window

 

by: oocytePosted on 2009-10-13 at 15:42:30ID: 25565556

If you need to run a shell script from within perl, and from looking at your script, you probably want the "FAIL" print out, use backticks `` or qx.

my $output = `scriptname`;

 

by: saibskPosted on 2009-10-14 at 05:07:44ID: 25569517

but what is the bc command equivalent in perl

 

by: FishMongerPosted on 2009-10-14 at 05:33:45ID: 25569712

I have not used either of these modules, but is this what you're looking for?

bc - An arbitrary precision calculator language
http://search.cpan.org/~cwest/ppt-0.14/src/bc/bc.pod

Inline::BC - Inline ILSM for bc the arbitrary precision math Language
http://search.cpan.org/~rongrw/Inline-BC-0.08/BC.pm

 

by: saibskPosted on 2009-10-14 at 06:33:15ID: 25570239

how can i change the code in my shell script to perl using the bc function or is there anything equivalent to that,

 

by: TintinPosted on 2009-10-14 at 14:13:08ID: 25575340

What's wrong with the code I already supplied?

 

by: ozoPosted on 2009-10-15 at 21:19:09ID: 25587001

#!/usr/bin/perl
$curr_count=10;
$prev_count=20;

     $curr = $curr_count;
     $prev = $prev_count;
     $pct_diff = $curr * 100 / $prev;
     if ($prev >= 100 || $curr >= 100){
        if ($pct_diff < 80){
                print "FAIL"
        }
     }

20120131-EE-VQP-002

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