Help - I am unable to send notifications

[jonathan williams]

On Tue, 2008-07-22 at 14:06 -0700, Fulton, David wrote:
> 
> > -----Original Message-----
> > From: nagios-users-bounces at lists.sourceforge.net
> > [mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf
> > Of jonathan williams
> > Sent: Tuesday, July 22, 2008 2:36 PM
> > To: Marc Powell
> > Cc: Nagios User list
> > Subject: Re: [Nagios-users] Help - I am unable to send notifications
> >
> >
> > On Tue, 2008-07-22 at 11:14 -0700, Marc Powell wrote:
> > >
> > > On Jul 22, 2008, at 12:26 PM, jonathan williams wrote:
> > > >>
> > >
> > > >> Umm..what can I say?  Wow.  OK.. I fixed that in the
> > send_mail.pl
> > > >> file.  Any other steps I need to take once I did that to make
> it
> > > >> work.
> > > >> I did re-run the sed-i command and still get the same error:
> > > >
> > >
> > > Not unless you experience further errors.
> > >
> > > > root at LOOKINIUM:/usr/local/nagios/libexec# sed -i
> > '1s,.*,#!/usr/bin/
> > > > perl -w,' check_sendmail.pl
> > > > sed: can't read check_sendmail.pl: No such file or directory
> > >
> > > Ok. sed 101.
> > >
> > > sed -i '1s,.*,#!/usr/bin/perl -w,' check_sendmail.pl
> > >
> > > The above is a sed 1-liner. It performs an immediate action
> > and then
> > > exits. What action? Let's break it down --
> > >
> > > sed : this is the command to be executed -i : this tells
> > sed that it's
> > > going to be editing an existing file 1s : the start of the
> > actual sed
> > > script. This means we're going to be doing 1 substitution
> > > .* : this is what we're going to be looking for, essentially any
> > > content on the line #!/usr/bin/perl -w : what the previous
> > match will
> > > be replaced with check_sendmail.pl : The file that sed is
> > going to be
> > > editing
> > >
> > > The end result is that sed would replace the entire first
> > line of the
> > > file check_sendmail.pl, located in your current directory, with
> the
> > > text '#!/usr/bin/perl -w'.
> > >
> > > Your confusion is that the filename should have been
> check_mail.pl,
> > > not check_sendmail.pl.
> > >
> > > --
> > > Marc
> > >
> >
> >
> > Thank you for that breakdown. 
> >
> > I am still having the same error in my nagios.log:
> >
> > "[1216749581] SERVICE NOTIFICATION:
> > nagiosadmin;jwilliamspc;PrintSpooler;OK;service-notify-by-emai
> l;Spooler:
> > Started
> > [1216749581] Warning: Attempting to execute the command
> > "/usr/local/nagios/libexec/send_mail.pl -n "SERVICE RECOVERY"
> -h "jwilliamspc" -s "OK" -a "10.10.113.51" -i "PrintSpooler - >
> Spooler:
> > Started - check_nt!SERVICESTATE!-d SHOWALL -l Spooler" -d "Tue Jul
> 22
> > 10:59:41 PDT 2008" -e "jonathan.williams at us.g4s.com""
> > resulted in a return code of 126.  Make sure the script or
> > binary you are trying to execute actually exists..."
> >
> > The top line in the send_mail.pl script is indeed
> > "#!/usr/bin/perl -w".
> > I am not sure what it does though.  Doesn't the # mean it is
> remarked?
> > I guess my confusion is that there is no such file on my
> > system called check_sendmail.pl or check_mail.pl.  I was
> > unable to locate any of them.
> > There is only a check_mailq.  That is why when you state:
> >
> > #!/usr/bin/perl -w : what the previous match will be replaced with
> > > check_sendmail.pl : The file that sed is going to be editing
> > >
> > > The end result is that sed would replace the entire first
> > line of the
> > > file check_sendmail.pl, located in your current directory, with
> the
> > > text '#!/usr/bin/perl -w'.
> > >
> > > Your confusion is that the filename should have been
> check_mail.pl,
> > > not check_sendmail.pl.
> >
> > I get lost.
> 
> As Marc broke down the sed line I will break down the line above, the
> #
> character is indeed a comment character, but only to PERL. PERL is not
> what tries to load the file initially, the shell tries to load the
> file
> as a compiled program(like /bin/ls is the compiled program that lists
> the files in a directory: I ran this on my nagios server as an
> example):
> 
> [dfulton at nagios01 nagios]$ file /bin/ls
> /bin/ls: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for
> GNU/Linux 2.4.0, dynamically linked (uses shared libs), stripped
> [dfulton at nagios01 nagios]$
> 
> But since a PERL script is interpretted and not compiled (technically
> that isn't true either but it might as well be), the loader normally
> doesn't know what to do with it, so the gods of UNIX decided that the
> characters #! Would have special signifigance to the loader at the
> beginning of the file. They indicate the program that will interpret
> the
> script. So when the loader sees it it then looks for the /usr/bin/perl
> program and execs it with the -w command and the script path so that
> it
> will interpret the script. If /usr/bin/perl does not exist you will
> have
> problems. To verify the existence of it just "ls /usr/bin/perl". Most
> systems have it there, but a few do not, instead they keep it in
> /usr/local/bin/ so you might need to change that line to
> "#!/usr/local/bin/perl -w" instead. But only if it is in that
> location,
> if it isn't you will need to find it. Which may not be so hard since
> nagios probably found it when you installed it and if you do a "file
> *"
> in the plugin directory and then type "head " and the name of a perl
> script you should see where it really is.
> 
> Hope this helps.

That helped a great deal in helping me understand what it is typing to
do.  That top line than of #!/usr/bin/perl -w does exist and the perl
file does exist in /usr/bin so it should all be correct.  Up until you
pointed out my typo of the spelling of perl as "pearl" this obviously
would not work and I was optimistic of this correcting the problem.
However I fixed the spelling and am still getting the same error.  It is
just not seeing send_mail.pl as a valid script.  The script of course is
defined in the commands.cfg file as:

define command{
	command_name	service-notify-by-email
	command_line	$USER1$/send_mail.pl -n "SERVICE $NOTIFICATIONTYPE$" -h
"$HOSTNAME$" -s "$SERVICESTATE$" -a "$HOSTADDRESS$" -i "$SERVICEDESC$ -
$SERVICEOUTPUT$ - $SERVICECHECKCOMMAND$" -d "$LONGDATETIME$" -e
"$CONTACTEMAIL$"
	}


> 

> 
> 

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