I am trying to write a piece of code that will look at a named pipe and move on if there is nothing to read from the pipe. I am using "select" and "vec" examples straight from the documentation (which honestly is leaving me a little confused). Obviously I am doing something wrong here and any insight is greatly appreciated. Here is my code : 
#!/usr/bin/perl -w
use strict;

my $FiFo='/opt/WFmon/logs/cpu.comm';
my $read='';
my $timeout=1;
my ($nfound);

open(FIFO, "<$FiFo") || warn "cannot open fifo\n";
vec($read, fileno(FIFO), 1) = 1;
$nfound = select($read, undef, undef, $timeout);

if($nfound){
  if(vec($read, fileno(FIFO), 1)){
    print "here - $nfound\n";
  }
  else{
    print "not here - $nfound\n";
  }
}
else{
 print "nothing\n";
}

close(FIFO);

[download]
This works in the sence that when I copy/print/echo a string to the pipe (/opt/WFmon/logs/cpu.comm), the script proceeds to the first "if" statement. Otherwise, the script just hangs there waiting for the pipe to complete and never times out.

Thank you!
Bryan

In reply to timeout on dead pipe by Chapter_01

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