Much better explanation, thank you. Try this:

#! perl -sw
use strict;

my $file = $ARGV[0];

open I, '<', $file or die $!;

my @outs;
open $outs[ $_ ], '>', "$file.$_" or die $! for 1 .. 4;

my $out = 1;

while( <I> ) {
    print { $outs[ $out ] } $_;
    if( /^5/ ) {
         ++$out;
         $out = 1 if $out > 4;
    }
}

[download]

Call it as scriptname filename. The 4 output files will be named filename.1 filename.2 filename.3 filename.4

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority". I knew I was on the right track :)
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Splitting a Blocked file in Round Robin into smaller files by BrowserUk
in thread Splitting a Blocked file in Round Robin into smaller files by tradersjoe0

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