Thanks I should note that "text file busy" only happens after i open the pipe with my perl script and terminate it. After that, this error occurs irrespective of whether later i've got the script (reader) running together with the writer or a writer by itself.
I've checked the pipe is open by one thread only and the descriptor is not maintained after i exit the script.
The code snippet is quite basic:
my $alertsthr = threads->new(\&al_thread);
$SIG{'INT'} = 'CLEANUP';
sub CLEANUP {
print "\nClosing pipe\n";
close PIPE;
exit();
}
sub al_thread
{
my $myline;
while (1) # keep reading from the pipe until we're killed
{
print "$config->{FIFO} open\n" if $config->{VERBOSE};
open (PIPE, "$config->{FIFO}") or die "Could not open the input
+pipe $config->{FIFO}\n";
while($myline = <PIPE>)
{
print "read $myline\n" if $config->{VERBOSE};
process_message($myline);
}
print "$config->{FIFO} EOF\n" if $config->{VERBOSE};
}
}