Help in Perl script (newbiew)

[AlexMahmood]

The soruce is the url to get the status of the server page
Output is as following between lines
------------------------------------------------------------------------------------------
Apache Server Status for test01

Server Version: IBM_HTTP_Server
Server Built: Apr 7 2003 13:38:46

Current Time: Tuesday, 19-Aug-2008 16:11:09 EDT
Restart Time: Sunday, 17-Aug-2008 07:44:21 EDT
Parent Server Generation: 0
Server uptime: 2 days 8 hours 26 minutes 48 seconds
Total accesses: 980721 - Total Traffic: 3.9 GB
CPU Usage: u25654.1 s5329.57 cu0 cs0 - 15.2% CPU load
4.83 requests/sec - 20.2 kB/second - 4285 B/request
6 requests currently being processed, 69 idle workers

------------------------------------------------------------------------------------------
I can get abve ouput in variable

I want to grab the underline and bold values in 4 variables and print those on screen

Thank you in advance.
Alex

[eWish]

What have you tried? How much perl do you know. Please show use the code.

--Kevin

[AlexMahmood]

I know the khs, I understand programming but very basic perl.

my code

#!/usr/bin/perl
#
$output = `wget -q -O- --bind-address=localhost http://test:64999/server-status`; || die "Problems: $!"
$output =~ /CPU Usage: u/;
print "$1 ";

I tried for 1 value to print but no output on the screen.
If I get this working I'll try more in perl.

TIA

What have you tried? How much perl do you know. Please show use the code.

--Kevin

[Ganon11]

I know the khs, I understand programming but very basic perl.

my code

#!/usr/bin/perl
#
$output = `wget -q -O- --bind-address=localhost http://test:64999/server-status`; || die "Problems: $!"
$output =~ /CPU Usage: u/;
print "$1 ";

I tried for 1 value to print but no output on the screen.
If I get this working I'll try more in perl.

TIA

You're trying to print $1, but you haven't captured anything in the previous regexp. In fact, your regexp on line 4 doesn't do anything except match for "CPU Usage: u", and doesn't capture, change, or affect anything else.

Also, the "|| die" portion of your assignment in line 3 is after a semicolon, which should be giving you syntax errors (or would be if you had use strict and use warnings enabled).

[eWish]

Currently you are not capturing the data in your regex. If you want to capture then you will need to use a set of ().

$output =~ /(CPU Usage: u)/;
print $1;

I would suggest that you check out perlre.

--Kevin

[AlexMahmood]

thanks, I'll read the link you posted, meanwhile if you could pls show how to do for 1 var and then I'll try for others.

TIA

[eWish]

Here is an example to help you get started. In this example I am opening a file and reading it line by line and looking for a match according to the regex. If it finds a match then print it what was captured in $1.

open(my $FILE, '<', $test_file) || die "Can't open $test_file: $!\n";
while(<$FILE>) {
    chomp;
    print $1 if /^(CPU Usage:.*?\w\d{4}.\d)/g;    
}
close($FILE);

Since regular expressions are not my strong point someone may point out a better solution.

--Kevin

[AlexMahmood]

Thanks I'll try in the morning.

Here is an example to help you get started. In this example I am opening a file and reading it line by line and looking for a match according to the regex. If it finds a match then print it what was captured in $1.

open(my $FILE, '<', $test_file) || die "Can't open $test_file: $!\n";
while(<$FILE>) {
    chomp;
    print $1 if /^(CPU Usage:.*?\w\d{4}.\d)/g;    
}
close($FILE);

Since regular expressions are not my strong point someone may point out a better solution.

--Kevin