As Laurent_R points out, this can be much more simply done in Perl. Taking your raw output as my input, I grep any lines of interest then pass them through a map. Split breaks each line up and I pull out the 9th element (subscript 8 as subscripts are zero-based) from the map and print it.

$ perl -Mstrict -Mwarnings -E '
open my $ntpqFH, q{<}, \ <<EOD or die $!;
     remote           refid      st t when poll reach   delay   offset
+    disp
======================================================================
+========
 LOCAL(0)        LOCAL(0)        10 l   34   64  377     0.00    0.000
+   10.01
*gpstime.domain.l .PPS.            1 u  879 1024  377     1.85   -0.02
+5    0.03
 hitman.domain.lo 0.0.0.0         16 -    - 1024    0     0.00    0.00
+0 16000.0

EOD

my @asteriskLines = grep m{^\*}, <$ntpqFH>;
say for map { ( split )[ 8 ] } @asteriskLines;'
-0.025
$

[download]

I hope this is of interest.

Cheers,

JohnGG

In reply to Re: using Backtick inside perl gives different output by johngg
in thread using Backtick inside perl gives different output by kaka_2

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