I assume I am doing something stupid here. But I just cant figure out what is going on. The first line from reading bash output is missing see here:

# Read in output
my $content;
while( my $line = <> ) {
    print $line;
}
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Then example:

root@dev [/projects/stdin]# head /var/log/messages | ./test
Oct  7 01:30:02 dev modprobe: FATAL: Module ip_tables not found. 
Oct  7 02:00:01 dev last message repeated 3 times
Oct  7 02:30:01 dev last message repeated 6 times
Oct  7 03:00:01 dev last message repeated 3 times
Oct  7 03:30:01 dev last message repeated 3 times
Oct  7 04:00:02 dev last message repeated 3 times
Oct  7 04:30:02 dev last message repeated 6 times
Oct  7 05:00:01 dev last message repeated 3 times
Oct  7 05:30:01 dev last message repeated 3 times
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So yeah.... head by default shows 10 lines, however when piped I am only getting 9.

Update: oohhhhh nvm, i had a -n in the shebang, thanks!