> Thanks for your replies. I understand that system() returns an exit
> code when it is done. My problem is that the command to be run by
> system() is not getting the variable.
>
> Here is the error I get when I run the script...
>
> 98299
> usage: kill [-s signal_name] pid ...
> kill -l [exit_status]
> kill -signal_name pid ...
> kill -signal_number pid ...
>
>
> 98299 is what is found in the pid file. Why is this number not being
> passed to the kill command in system ("kill $mypid"). I have used
> something similar to this in other scripts with no problems.
The something similar is probably:
$mypid = `cat $afile`;
chomp($mypid);
It's not working currently because the cat command prints 98299 to the
screen, and $mypid gets the return value from system.
But really, you don't want to be using cat at all. Open the file yourself
and read the value.
open F, $afile or die "Can't open $afile: $!";
my $mypid = <F>;
chomp $mypid;
close F or die "Can't close $afile: $!";
You want to be using Perl's kill function too:
kill $sig, $mypid or die "Can't signal $mypid";
where $sig is whatever signal you want to send.
perldoc -f kill
>
> -----Original Message-----
> From: Dharmender Rai [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, October 10, 2002 8:40 AM
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED];
> [EMAIL PROTECTED]
> Subject: RE: Problem with variable in system command
>
>
> Anthony,
> system() return the exit status. Type "perldoc -f
> system" . When the command is successful, you will get
> 0.
> --- [EMAIL PROTECTED] wrote: > As a
> test I would print $mypid and it had the
>> correct pid number in it.
>>
>> Here is the complete script, if it will help...
>>
>> #!/usr/bin/perl -w
>> use strict;
>> use File::Find;
>> my $dir = '/usr/local/etc/mrtg';
>> my $ext = '.pid';
>> my (@dirstruct);
>> my $mypid;
>>
>> find(\&wanted,$dir);
>>
>> foreach my $afile (@dirstruct) {
>> $mypid = system("cat $afile");
>> chop($mypid);
>> print "Killing instance...";
>> #print "$mypid";
>> print $mypid;
>> #system("kill $mypid");
>> }
>> exit;
>>
>> sub wanted {
>> my $entry = "$File::Find::name" if -e;
>> push @dirstruct, $entry if (($entry ne '') && ((
>> m/$ext$/) and (substr
>> $entry, 0, -4))); #This will only work with *.pid
>> }
>>
>>
>>
>> -----Original Message-----
>> From: Dharmender Rai
>> [mailto:[EMAIL PROTECTED]]
>> Sent: Thursday, October 10, 2002 8:06 AM
>> To: [EMAIL PROTECTED];
>> [EMAIL PROTECTED]
>> Subject: Re: Problem with variable in system command
>>
>>
>>
>> $mypid contains the status of the process not its
>> pid.
>> --- [EMAIL PROTECTED] wrote: > I've
>> written a script to search for all *.pid files
>> > in a dir, then do
>> > a cat on the file. The script will then use this
>> > variable to kill the
>> > process. The problem I'm having is that the
>> > varibale is not being
>> > read correctly. I run the script and the kill
>> > process tries to run
>> > without the variable. Here is a post of the code
>> I
>> > have. Anyhelp
>> > would be greatly appreciated.
>> >
>> >
>> > find(\&wanted,$dir);
>> >
>> > foreach my $afile (@dirstruct) {
>> > $mypid = system("cat $afile");
>> > chop($mypid);
>> > print "Killing instance...";
>> > system("kill $mypid");
>> >
>> >
>> > I wrote this script a few weeks ago and it worked
>> > great, but I accidentally
>> > deleted it and can't rememeber exactly how it was
>> > written. :-/
>> >
>> >
>> > --
>> > To unsubscribe, e-mail:
>> > [EMAIL PROTECTED]
>> > For additional commands, e-mail:
>> > [EMAIL PROTECTED]
>> >
>>
>> __________________________________________________
>> Do You Yahoo!?
>> Everything you'll ever need on one web page
>> from News and Sport to Email and Music Charts
>> http://uk.my.yahoo.com
>>
>> --
>> To unsubscribe, e-mail:
>> [EMAIL PROTECTED]
>> For additional commands, e-mail:
>> [EMAIL PROTECTED]
>>
>
> __________________________________________________
> Do You Yahoo!?
> Everything you'll ever need on one web page
> from News and Sport to Email and Music Charts
> http://uk.my.yahoo.com
>
> --
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
--
Paul Johnson - [EMAIL PROTECTED]
http://www.pjcj.net
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
