Simple problem. I have 2 perl programs, one feeding the other with an infinite loop of "\n" terminated data lines. I'm running perl v5.10.0 built for i486-linux-gnu-thread-multi. I get no output on the following: 
% ./buff1.pl | ./buff2.pl  
(out of memory)

[download]
-----buff1.pl----- 
#!/usr/bin/perl
use strict;
use FileHandle;

my $tslast = "";
while( 1 == 1 )
{
    my $timestamp = time();

    if( $timestamp ne $tslast )
    {
    my $ofh = select STDOUT;
    $| = 1;
    select $ofh;
        $ofh->autoflush(1);
        print STDOUT $timestamp . "\n";
        $tslast = $timestamp;
    }

}

[download]
------ end buff1.pl ------------------------ ------- buff2.pl ------------------------ 
#!/usr/bin/perl
use FileHandle;

foreach my $line ( <STDIN> )
{
    my $ofh = select STDOUT;
    $| = 1;
    select $ofh;
    $ofh->autoflush(1);

    print STDOUT $line;
}

[download]
------ end buff2.pl ---------------

How can I remove buffering so that buff2.pl spits out my timestamps?

In reply to Stop buffering on STDOUT by afroncio

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