Shell Programming and Scripting

$ 
$ cat data.log.1
###s1
main.build.3495
main.build.199
main.build.3408

###s2
main.build.3495
main.build.3408
main.build.199
$ 
$ ##
$ perl -ne 'chomp;
>           if (/^###s1/) {$s1=true} elsif(/^###s2/) {$s2=true}
>           if ($s2) {push @s2,$_} elsif($_ ne "" && $s1) {push @s1,$_}
>           END {print "Array \@s1:\n";foreach $i (@s1) {print $i,"\n"}
>                print "Array \@s2:\n";foreach $i (@s2) {print $i,"\n"}}' data.log.1
Array @s1:
###s1
main.build.3495
main.build.199
main.build.3408
Array @s2:
###s2
main.build.3495
main.build.3408
main.build.199
$