if (!open my $log_FH, '>', './testlogifle.txt') {
    print "Failure to open log file.\n";
    die "Failure to open log file.\n";
}

[download]

Note that the lexical  $log_FH in the quoted code is local to the if-block and cannot be used by anything except the open failure-handling code — probably not what GreenLantern intends. Instead, the lexical should be declared outside the block if it is ever to be used there.

Also, this might be a good occasion to use the otherwise puzzling idiom I see sometimes in bioinformatics code: wrapping the open in an unless-block: 

my $log_FH;

unless (open $log_FH, '>', './testlogifle.txt') {
    print "Failure to open log file.\n";
    die "Failure to open log file.\n";
    }

do_something_with($log_FH);

...

[download]

Give a man a fish:  <%-{-{-{-<

In reply to Re^4: Multiple actions triggered by failure to open a file by AnomalousMonk
in thread Multiple actions triggered by failure to open a file by GreenLantern

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