Thanks for your reply. I am new to Perl language so please be patient with me. for the first problem you mentioned, I dont understand what I should do here. GotToBTru suggested to put while (<DIAG>) first and put inside this loop the rest of the statements. maybe i misunderstand what he suggested. please help me to understand. for problem 2 i put the last as you suggested. for the third issue I completely removed the LOGFILE because I dont need it. the purpose of this script is to check a diagnostic file (.dia) which is continuously updated and once it match a statement "higher than 5 seconds" to shutdown a service and start it again. and then continue to work. below is the updated code please take a look and let me know what should i do as I am desperate :( :( :( 


#!C:\Perl64\bin\perl.exe

use File::Tail;

my $routerip;
my $diagfile;
my $Checkoutput;
my $hostName1;
my $hostName2;

sub init {
    my ($dir) = @_;
    my $line;
    my $var;
    my $val;
    open (LREP2, "$dir/config/param.ini");
    while ($line = <LREP2>) {
           chop $line;
           ($var,$val) = split(/=/, $line);
           if ($var eq "ROUTERIP") {
               $routerip = $val;
           }
           if ($var eq "DIAGFILE") {
               $diagfile = $val;
           }
           if ($var eq "CHECKFILE") {
               $Checkoutput = $val;
           }
           if ($var eq "HOSTNAME1") {
               $hostName1 = $val;
           }
           if ($var eq "HOSTNAME2") {
               $hostName2 = $val;
           }
    }
    close LREP2;
}

#MAIN

die "Usage: $0 <app_root_dir>" unless @ARGV == 1;


my $app_root_dir = shift;
&init($app_root_dir);


my $line;
open (DIAG, "$diagfile");
my $ref=tie *DIAG,"File::Tail",(name=> $diagfile);
my $clock = 0;
while (<DIAG>) { 
    while (1) {
        while ($line = <DIAG>) {
            if ($line =~ /is higher than 5 seconds/) {
                if ($clock == 0) {
                    $clock = 60;
                    my $commandStr2 = "sc \\\\$hostName1 stop AudioSrv
+ >$app_root_dir\\logs\\StopServiceOutput1.txt" ;
                    system($commandStr2);
                    my $commandStr4 = "sc \\\\$hostName2 stop AudioSrv
+ >$app_root_dir\\logs\\StopServiceOutput2.txt" ;
                    system($commandStr4);
                    sleep(5);
                    my $commandStr3 = "sc \\\\$hostName1 start AudioSr
+v >$app_root_dir\\logs\\StartServiceOutput1.txt";
                    system($commandStr3);
                    my $commandStr5 = "sc \\\\$hostName2 start AudioSr
+v >$app_root_dir\\logs\\StartServiceOutput2.txt";
                    system($commandStr5);
                }
                $clock --;
            }
            last;        
        }
    }
}

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In reply to Re^4: trying to implement file tail with regular expression by mkhayat
in thread trying to implement file tail with regular expression by mkhayat

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