perl로 tail 구현

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#!/usr/bin/perl
open(FD, "log.txt") || die "can't open file";
for (;;)
{
    for($curpos = tell(FD); $line = <FD>; $curpos = tell(FD))
    {
        print $line;
    }
    sleep(1);
    seek(FD, $curpos, 0);
}
 
 
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