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system "xv $imagename";
$output=`more datafile`;
$pid=open READER, "programname arguments|" or die "Can't run the progr +am: $!\n"; while(<READER>){ $output.=$_; } close READER;
$pid=open WRITETOME, "|programname arguments" or die "Couldn't fork pr +ocess"; print WRITETOME "write this\n"; close WRITETOME;