Ok well in case anyone else is wondering, here's the solution I came up with: # cat /usr/local/nagios/libexec/check_io.pl #!/usr/bin/perl # author: alex harvey # email: <a href="mailto:alexh19740110@gmail.com">alexh19740110@gmail.com</a> # definitions use constant OK => 0; use constant WARNING => 1; use constant CRITICAL => 2; # read in config file require "/usr/local/nagios/etc/check_io.cfg"; # main open IOSTAT, "$IOSTAT $INTERVAL 3 | $TAIL -${LINES} |"; while ( <IOSTAT> ) { @col = split ' '; foreach $disk (keys %DISKS) { if ( $disk eq $col[0] ) { if ( $col[0] eq $disk ) { $DISKS{$disk}[0] = $col[1]; $DISKS{$disk}[1] = $col[2]; $DISKS{$disk}[2] = $col[7]; $DISKS{$disk}[3] = $col[9]; } } } } close IOSTAT; $exit_state = OK; foreach $disk (sort (keys %DISKS)) { if ( $DISKS{$disk}[2] >= $SVC_T_WTHRESHOLD && $DISKS{$disk}[3] >= $PC_B_WTHRESHOLD ) { if ( $DISKS{$disk}[2] < $SVC_T_CTHRESHOLD && $DISKS{$disk}[3] < $PC_B_WTHRESHOLD ) { $exit_state = ($exit_state < CRITICAL) ? WARNING : $exit_state; } else { $exit_state = CRITICAL; } } $exit_message = $exit_message. " ".$disk. ":: [ r/s: ".$DISKS{$disk}[0]. ", w/s: ".$DISKS{$disk}[1]. ", svc_t: ".$DISKS{$disk}[2]. ", and %b: ".$DISKS{$disk}[3]. " ],"; } if ( $exit_state == OK ) { $exit_message = "OK -$exit_message"; } elsif ( $exit_state == WARNING ) { $exit_message = "WARNING -$exit_message"; } else { $exit_message = "CRITICAL -$exit_message"; } $exit_message =~ s/,$/\n/; print $exit_message; exit $exit_state And the configuration file: # cat /usr/local/nagios/etc/check_io.cfg # check_io.cfg # constants $DISKS = 3; # number of physical disk partitions # diskid => [ r/s, w/s, service_time, %busy ] %DISKS = ( sd0 => [ 0, 0, 0, 0 ], sd1 => [ 0, 0, 0, 0 ], sd6 => [ 0, 0, 0, 0 ] ); $IOSTAT = '/usr/bin/iostat -x'; $TAIL = '/usr/bin/tail'; $LINES = 7; # number of lines in iostat -x $INTERVAL = 5; # second interval for iostat $SVC_T_WTHRESHOLD = 30; $PC_B_WTHRESHOLD = 5; $SVC_T_CTHRESHOLD = 40; $PC_B_CTHRESHOLD = 10; This is for a Solaris box whose iostat output looks like this: # iostat -x extended device statistics device r/s w/s kr/s kw/s wait actv svc_t %w %b sd0 0.0 1.4 0.3 9.4 0.0 0.0 31.6 0 1 sd1 0.0 0.0 0.0 0.0 0.0 0.0 3.4 0 0 sd6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 st12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 nfs1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 Regards, Alex <div>On 10/17/06, Andreas Ericsson <<a href="mailto:ae@op5.se">ae@op5.se</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Alexander Harvey wrote: > That doesn't look like a Solaris script to me but as far as your coding is > concerned, my thoughts are > [ excellent and non-disputed points removed ] > (iv) for security you ought to use full paths to all of your binaries: > i.e. > /usr/bin/echo > instead of > echo > "echo" is a built-in feature of pretty much all shells, so just using plain 'echo' is a perfectly viable and more performance friendly option. A better solution, for security's sake, is to force the $PATH to a safe value at the beginning of the script and not bother with full paths. As a last note, "echo" is required to exist on the root partition, which places it in /bin on all systems I've ever come across. -- Andreas Ericsson <a href="mailto:andreas.ericsson@op5.se">andreas.ericsson@op5.se</a> OP5 AB <a href="http://www.op5.se"> www.op5.se</a> Tel: +46 8-230225 Fax: +46 8-230231 </blockquote></div>